diff options
Diffstat (limited to 'arch/openrisc')
50 files changed, 707 insertions, 1399 deletions
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index bc428b5f126..e71d712afb7 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -7,23 +7,25 @@ config OPENRISC def_bool y select OF select OF_EARLY_FLATTREE + select IRQ_DOMAIN select HAVE_MEMBLOCK - select ARCH_WANT_OPTIONAL_GPIOLIB + select ARCH_REQUIRE_GPIOLIB select HAVE_ARCH_TRACEHOOK - select HAVE_GENERIC_HARDIRQS select GENERIC_IRQ_CHIP select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW select GENERIC_IOMAP select GENERIC_CPU_DEVICES + select GENERIC_ATOMIC64 + select GENERIC_CLOCKEVENTS + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER + select MODULES_USE_ELF_RELA + select HAVE_DEBUG_STACKOVERFLOW config MMU def_bool y -config SYMBOL_PREFIX - string - default "" - config HAVE_DMA_ATTRS def_bool y @@ -39,13 +41,7 @@ config RWSEM_XCHGADD_ALGORITHM config GENERIC_HWEIGHT def_bool y -config NO_IOPORT - def_bool y - -config GENERIC_GPIO - def_bool y - -config GENERIC_CLOCKEVENTS +config NO_IOPORT_MAP def_bool y config TRACE_IRQFLAGS_SUPPORT @@ -56,11 +52,9 @@ config TRACE_IRQFLAGS_SUPPORT config GENERIC_CSUM def_bool y -config GENERIC_FIND_NEXT_BIT - def_bool y - source "init/Kconfig" +source "kernel/Kconfig.freezer" menu "Processor type and features" @@ -107,7 +101,6 @@ config OPENRISC_HAVE_INST_DIV endmenu -source "kernel/time/Kconfig" source kernel/Kconfig.hz source kernel/Kconfig.preempt source "mm/Kconfig" @@ -136,16 +129,6 @@ config CMDLINE menu "Debugging options" -config DEBUG_STACKOVERFLOW - bool "Check for kernel stack overflow" - default y - help - Make extra checks for space avaliable on stack in some - critical functions. This will cause kernel to run a bit slower, - but will catch most of kernel stack overruns and exit gracefuly. - - Say Y if you are unsure. - config JUMP_UPON_UNHANDLED_EXCEPTION bool "Try to die gracefully" default y diff --git a/arch/openrisc/Makefile b/arch/openrisc/Makefile index 158ae4c0dc6..89076a66eee 100644 --- a/arch/openrisc/Makefile +++ b/arch/openrisc/Makefile @@ -24,7 +24,7 @@ OBJCOPYFLAGS := -O binary -R .note -R .comment -S LDFLAGS_vmlinux := LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name) -KBUILD_CFLAGS += -pipe -ffixed-r10 +KBUILD_CFLAGS += -pipe -ffixed-r10 -D__linux__ ifeq ($(CONFIG_OPENRISC_HAVE_INST_MUL),y) KBUILD_CFLAGS += $(call cc-option,-mhard-mul) @@ -38,7 +38,7 @@ else KBUILD_CFLAGS += $(call cc-option,-msoft-div) endif -head-y := arch/openrisc/kernel/head.o arch/openrisc/kernel/init_task.o +head-y := arch/openrisc/kernel/head.o core-y += arch/openrisc/lib/ \ arch/openrisc/kernel/ \ @@ -50,6 +50,6 @@ BUILTIN_DTB := y else BUILTIN_DTB := n endif -core-$(BUILTIN_DTB) += arch/openrisc/boot/ +core-$(BUILTIN_DTB) += arch/openrisc/boot/dts/ all: vmlinux diff --git a/arch/openrisc/boot/Makefile b/arch/openrisc/boot/dts/Makefile index 09958358601..b092d30d6c2 100644 --- a/arch/openrisc/boot/Makefile +++ b/arch/openrisc/boot/dts/Makefile @@ -1,5 +1,3 @@ - - ifneq '$(CONFIG_OPENRISC_BUILTIN_DTB)' '""' BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_OPENRISC_BUILTIN_DTB)).dtb.o else @@ -10,6 +8,3 @@ obj-y += $(BUILTIN_DTB) clean-files := *.dtb.S #DTC_FLAGS ?= -p 1024 - -$(obj)/%.dtb: $(src)/dts/%.dts FORCE - $(call if_changed_dep,dtc) diff --git a/arch/openrisc/configs/or1ksim_defconfig b/arch/openrisc/configs/or1ksim_defconfig index ea172bdfa36..42fe5303a37 100644 --- a/arch/openrisc/configs/or1ksim_defconfig +++ b/arch/openrisc/configs/or1ksim_defconfig @@ -1,9 +1,9 @@ CONFIG_CROSS_COMPILE="or32-linux-" +CONFIG_NO_HZ=y CONFIG_LOG_BUF_SHIFT=14 CONFIG_BLK_DEV_INITRD=y # CONFIG_RD_GZIP is not set CONFIG_EXPERT=y -# CONFIG_SYSCTL_SYSCALL is not set # CONFIG_KALLSYMS is not set # CONFIG_EPOLL is not set # CONFIG_TIMERFD is not set @@ -15,7 +15,6 @@ CONFIG_SLOB=y CONFIG_MODULES=y # CONFIG_BLOCK is not set CONFIG_OPENRISC_BUILTIN_DTB="or1ksim" -CONFIG_NO_HZ=y CONFIG_HZ_100=y CONFIG_NET=y CONFIG_PACKET=y @@ -39,11 +38,8 @@ CONFIG_DEVTMPFS_MOUNT=y # CONFIG_FW_LOADER is not set CONFIG_PROC_DEVICETREE=y CONFIG_NETDEVICES=y -CONFIG_MICREL_PHY=y -CONFIG_NET_ETHERNET=y CONFIG_ETHOC=y -# CONFIG_NETDEV_1000 is not set -# CONFIG_NETDEV_10000 is not set +CONFIG_MICREL_PHY=y # CONFIG_WLAN is not set # CONFIG_INPUT is not set # CONFIG_SERIO is not set @@ -55,11 +51,9 @@ CONFIG_SERIAL_8250_CONSOLE=y CONFIG_SERIAL_OF_PLATFORM=y # CONFIG_HW_RANDOM is not set # CONFIG_HWMON is not set -# CONFIG_MFD_SUPPORT is not set # CONFIG_USB_SUPPORT is not set # CONFIG_DNOTIFY is not set CONFIG_TMPFS=y CONFIG_NFS_FS=y -CONFIG_NFS_V3=y # CONFIG_ENABLE_WARN_DEPRECATED is not set # CONFIG_ENABLE_MUST_CHECK is not set diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild index 11162e6c878..480af0d9c2f 100644 --- a/arch/openrisc/include/asm/Kbuild +++ b/arch/openrisc/include/asm/Kbuild @@ -1,17 +1,17 @@ -include include/asm-generic/Kbuild.asm -header-y += spr_defs.h +header-y += ucontext.h generic-y += atomic.h generic-y += auxvec.h +generic-y += barrier.h generic-y += bitsperlong.h generic-y += bug.h generic-y += bugs.h generic-y += cacheflush.h generic-y += checksum.h -generic-y += cmpxchg.h +generic-y += clkdev.h generic-y += cmpxchg-local.h -generic-y += cpumask.h +generic-y += cmpxchg.h generic-y += cputime.h generic-y += current.h generic-y += device.h @@ -19,11 +19,13 @@ generic-y += div64.h generic-y += dma.h generic-y += emergency-restart.h generic-y += errno.h +generic-y += exec.h generic-y += fb.h generic-y += fcntl.h generic-y += ftrace.h generic-y += futex.h generic-y += hardirq.h +generic-y += hash.h generic-y += hw_irq.h generic-y += ioctl.h generic-y += ioctls.h @@ -31,7 +33,9 @@ generic-y += ipcbuf.h generic-y += irq_regs.h generic-y += kdebug.h generic-y += kmap_types.h +generic-y += kvm_para.h generic-y += local.h +generic-y += mcs_spinlock.h generic-y += mman.h generic-y += module.h generic-y += msgbuf.h @@ -39,8 +43,8 @@ generic-y += pci.h generic-y += percpu.h generic-y += poll.h generic-y += posix_types.h +generic-y += preempt.h generic-y += resource.h -generic-y += rmap.h generic-y += scatterlist.h generic-y += sections.h generic-y += segment.h @@ -52,13 +56,18 @@ generic-y += siginfo.h generic-y += signal.h generic-y += socket.h generic-y += sockios.h -generic-y += statfs.h generic-y += stat.h +generic-y += statfs.h generic-y += string.h generic-y += swab.h +generic-y += switch_to.h generic-y += termbits.h generic-y += termios.h generic-y += topology.h +generic-y += trace_clock.h generic-y += types.h generic-y += ucontext.h generic-y += user.h +generic-y += vga.h +generic-y += word-at-a-time.h +generic-y += xor.h diff --git a/arch/openrisc/include/asm/bitops.h b/arch/openrisc/include/asm/bitops.h index a9e11efae14..3003cdad561 100644 --- a/arch/openrisc/include/asm/bitops.h +++ b/arch/openrisc/include/asm/bitops.h @@ -27,14 +27,7 @@ #include <linux/irqflags.h> #include <linux/compiler.h> - -/* - * clear_bit may not imply a memory barrier - */ -#ifndef smp_mb__before_clear_bit -#define smp_mb__before_clear_bit() smp_mb() -#define smp_mb__after_clear_bit() smp_mb() -#endif +#include <asm/barrier.h> #include <asm/bitops/__ffs.h> #include <asm-generic/bitops/ffz.h> @@ -54,6 +47,7 @@ #include <asm-generic/bitops/atomic.h> #include <asm-generic/bitops/non-atomic.h> +#include <asm-generic/bitops/le.h> #include <asm-generic/bitops/ext2-atomic.h> #endif /* __ASM_GENERIC_BITOPS_H */ diff --git a/arch/openrisc/include/asm/dma-mapping.h b/arch/openrisc/include/asm/dma-mapping.h index b206ba4608b..fab8628e1b6 100644 --- a/arch/openrisc/include/asm/dma-mapping.h +++ b/arch/openrisc/include/asm/dma-mapping.h @@ -20,150 +20,71 @@ /* * See Documentation/DMA-API-HOWTO.txt and * Documentation/DMA-API.txt for documentation. - * - * This file is written with the intention of eventually moving over - * to largely using asm-generic/dma-mapping-common.h in its place. */ #include <linux/dma-debug.h> #include <asm-generic/dma-coherent.h> #include <linux/kmemcheck.h> +#include <linux/dma-mapping.h> #define DMA_ERROR_CODE (~(dma_addr_t)0x0) +extern struct dma_map_ops or1k_dma_map_ops; -#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) -#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) - -void *or1k_dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag); -void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle); -dma_addr_t or1k_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir, - struct dma_attrs *attrs); -void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction dir, - struct dma_attrs *attrs); -int or1k_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - struct dma_attrs *attrs); -void or1k_unmap_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - struct dma_attrs *attrs); -void or1k_sync_single_for_cpu(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir); -void or1k_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir); - -static inline void *dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t flag) +static inline struct dma_map_ops *get_dma_ops(struct device *dev) { - void *memory; - - memory = or1k_dma_alloc_coherent(dev, size, dma_handle, flag); - - debug_dma_alloc_coherent(dev, size, *dma_handle, memory); - return memory; + return &or1k_dma_map_ops; } -static inline void dma_free_coherent(struct device *dev, size_t size, - void *cpu_addr, dma_addr_t dma_handle) -{ - debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); - or1k_dma_free_coherent(dev, size, cpu_addr, dma_handle); -} +#include <asm-generic/dma-mapping-common.h> -static inline dma_addr_t dma_map_single(struct device *dev, void *ptr, - size_t size, - enum dma_data_direction dir) -{ - dma_addr_t addr; - - kmemcheck_mark_initialized(ptr, size); - BUG_ON(!valid_dma_direction(dir)); - addr = or1k_map_page(dev, virt_to_page(ptr), - (unsigned long)ptr & ~PAGE_MASK, size, - dir, NULL); - debug_dma_map_page(dev, virt_to_page(ptr), - (unsigned long)ptr & ~PAGE_MASK, size, - dir, addr, true); - return addr; -} +#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) -static inline void dma_unmap_single(struct device *dev, dma_addr_t addr, - size_t size, - enum dma_data_direction dir) +static inline void *dma_alloc_attrs(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) { - BUG_ON(!valid_dma_direction(dir)); - or1k_unmap_page(dev, addr, size, dir, NULL); - debug_dma_unmap_page(dev, addr, size, dir, true); -} + struct dma_map_ops *ops = get_dma_ops(dev); + void *memory; -static inline int dma_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir) -{ - int i, ents; - struct scatterlist *s; + memory = ops->alloc(dev, size, dma_handle, gfp, attrs); - for_each_sg(sg, s, nents, i) - kmemcheck_mark_initialized(sg_virt(s), s->length); - BUG_ON(!valid_dma_direction(dir)); - ents = or1k_map_sg(dev, sg, nents, dir, NULL); - debug_dma_map_sg(dev, sg, nents, ents, dir); + debug_dma_alloc_coherent(dev, size, *dma_handle, memory); - return ents; + return memory; } -static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir) -{ - BUG_ON(!valid_dma_direction(dir)); - debug_dma_unmap_sg(dev, sg, nents, dir); - or1k_unmap_sg(dev, sg, nents, dir, NULL); -} +#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) -static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, - size_t offset, size_t size, - enum dma_data_direction dir) +static inline void dma_free_attrs(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_handle, + struct dma_attrs *attrs) { - dma_addr_t addr; + struct dma_map_ops *ops = get_dma_ops(dev); - kmemcheck_mark_initialized(page_address(page) + offset, size); - BUG_ON(!valid_dma_direction(dir)); - addr = or1k_map_page(dev, page, offset, size, dir, NULL); - debug_dma_map_page(dev, page, offset, size, dir, addr, false); + debug_dma_free_coherent(dev, size, cpu_addr, dma_handle); - return addr; + ops->free(dev, size, cpu_addr, dma_handle, attrs); } -static inline void dma_unmap_page(struct device *dev, dma_addr_t addr, - size_t size, enum dma_data_direction dir) +static inline void *dma_alloc_noncoherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp) { - BUG_ON(!valid_dma_direction(dir)); - or1k_unmap_page(dev, addr, size, dir, NULL); - debug_dma_unmap_page(dev, addr, size, dir, true); -} + struct dma_attrs attrs; -static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr, - size_t size, - enum dma_data_direction dir) -{ - BUG_ON(!valid_dma_direction(dir)); - or1k_sync_single_for_cpu(dev, addr, size, dir); - debug_dma_sync_single_for_cpu(dev, addr, size, dir); + dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs); + + return dma_alloc_attrs(dev, size, dma_handle, gfp, &attrs); } -static inline void dma_sync_single_for_device(struct device *dev, - dma_addr_t addr, size_t size, - enum dma_data_direction dir) +static inline void dma_free_noncoherent(struct device *dev, size_t size, + void *cpu_addr, dma_addr_t dma_handle) { - BUG_ON(!valid_dma_direction(dir)); - or1k_sync_single_for_device(dev, addr, size, dir); - debug_dma_sync_single_for_device(dev, addr, size, dir); + struct dma_attrs attrs; + + dma_set_attr(DMA_ATTR_NON_CONSISTENT, &attrs); + + dma_free_attrs(dev, size, cpu_addr, dma_handle, &attrs); } static inline int dma_supported(struct device *dev, u64 dma_mask) diff --git a/arch/openrisc/include/asm/elf.h b/arch/openrisc/include/asm/elf.h index 2ce603bbfdd..d334e204bbd 100644 --- a/arch/openrisc/include/asm/elf.h +++ b/arch/openrisc/include/asm/elf.h @@ -15,52 +15,12 @@ * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ - #ifndef __ASM_OPENRISC_ELF_H #define __ASM_OPENRISC_ELF_H -/* - * ELF register definitions.. - */ -#include <linux/types.h> -#include <linux/ptrace.h> - -/* The OR1K relocation types... not all relevant for module loader */ -#define R_OR32_NONE 0 -#define R_OR32_32 1 -#define R_OR32_16 2 -#define R_OR32_8 3 -#define R_OR32_CONST 4 -#define R_OR32_CONSTH 5 -#define R_OR32_JUMPTARG 6 -#define R_OR32_VTINHERIT 7 -#define R_OR32_VTENTRY 8 - -typedef unsigned long elf_greg_t; - -/* - * Note that NGREG is defined to ELF_NGREG in include/linux/elfcore.h, and is - * thus exposed to user-space. - */ -#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t)) -typedef elf_greg_t elf_gregset_t[ELF_NGREG]; - -/* A placeholder; OR32 does not have fp support yes, so no fp regs for now. */ -typedef unsigned long elf_fpregset_t; - -/* This should be moved to include/linux/elf.h */ -#define EM_OR32 0x8472 -#define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */ - -/* - * These are used to set parameters in the core dumps. - */ -#define ELF_ARCH EM_OR32 -#define ELF_CLASS ELFCLASS32 -#define ELF_DATA ELFDATA2MSB - -#ifdef __KERNEL__ +#include <linux/types.h> +#include <uapi/asm/elf.h> /* * This is used to ensure we don't load something for the wrong architecture. @@ -102,7 +62,4 @@ extern void dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt); #define ELF_PLATFORM (NULL) -#define SET_PERSONALITY(ex) set_personality(PER_LINUX) - -#endif /* __KERNEL__ */ #endif diff --git a/arch/openrisc/include/asm/gpio.h b/arch/openrisc/include/asm/gpio.h index 0b0d174f47c..b3799d88ffc 100644 --- a/arch/openrisc/include/asm/gpio.h +++ b/arch/openrisc/include/asm/gpio.h @@ -1,65 +1,4 @@ -/* - * OpenRISC Linux - * - * Linux architectural port borrowing liberally from similar works of - * others. All original copyrights apply as per the original source - * declaration. - * - * OpenRISC implementation: - * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> - * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> - * et al. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#ifndef __ASM_OPENRISC_GPIO_H -#define __ASM_OPENRISC_GPIO_H - -#include <linux/errno.h> -#include <asm-generic/gpio.h> - -#ifdef CONFIG_GPIOLIB - -/* - * OpenRISC (or1k) does not have on-chip GPIO's so there is not really - * any standardized implementation that makes sense here. If passing - * through gpiolib becomes a bottleneck then it may make sense, on a - * case-by-case basis, to implement these inlined/rapid versions. - * - * Just call gpiolib. - */ -static inline int gpio_get_value(unsigned int gpio) -{ - return __gpio_get_value(gpio); -} - -static inline void gpio_set_value(unsigned int gpio, int value) -{ - __gpio_set_value(gpio, value); -} - -static inline int gpio_cansleep(unsigned int gpio) -{ - return __gpio_cansleep(gpio); -} - -/* - * Not implemented, yet. - */ -static inline int gpio_to_irq(unsigned int gpio) -{ - return -ENOSYS; -} - -static inline int irq_to_gpio(unsigned int irq) -{ - return -EINVAL; -} - -#endif /* CONFIG_GPIOLIB */ - -#endif /* __ASM_OPENRISC_GPIO_H */ +#ifndef __LINUX_GPIO_H +#warning Include linux/gpio.h instead of asm/gpio.h +#include <linux/gpio.h> +#endif diff --git a/arch/openrisc/include/asm/io.h b/arch/openrisc/include/asm/io.h index 07f5299d6c2..7c691399da3 100644 --- a/arch/openrisc/include/asm/io.h +++ b/arch/openrisc/include/asm/io.h @@ -30,6 +30,7 @@ #define PIO_MASK 0 #include <asm-generic/io.h> +#include <asm/pgtable.h> extern void __iomem *__ioremap(phys_addr_t offset, unsigned long size, pgprot_t prot); diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/page.h index b041b344b22..108906f991d 100644 --- a/arch/openrisc/include/asm/page.h +++ b/arch/openrisc/include/asm/page.h @@ -71,9 +71,6 @@ typedef struct page *pgtable_t; #define __pgd(x) ((pgd_t) { (x) }) #define __pgprot(x) ((pgprot_t) { (x) }) -extern unsigned long memory_start; -extern unsigned long memory_end; - #endif /* !__ASSEMBLY__ */ @@ -94,8 +91,7 @@ extern unsigned long memory_end; #define pfn_valid(pfn) ((pfn) < max_mapnr) -#define virt_addr_valid(kaddr) (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \ - ((void *)(kaddr) < (void *)memory_end)) +#define virt_addr_valid(kaddr) (pfn_valid(virt_to_pfn(kaddr))) #endif /* __ASSEMBLY__ */ diff --git a/arch/openrisc/include/asm/pgalloc.h b/arch/openrisc/include/asm/pgalloc.h index 05c39ecd2ef..21484e5b9e9 100644 --- a/arch/openrisc/include/asm/pgalloc.h +++ b/arch/openrisc/include/asm/pgalloc.h @@ -78,8 +78,13 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, { struct page *pte; pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0); - if (pte) - clear_page(page_address(pte)); + if (!pte) + return NULL; + clear_page(page_address(pte)); + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } @@ -90,6 +95,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) static inline void pte_free(struct mm_struct *mm, struct page *pte) { + pgtable_page_dtor(pte); __free_page(pte); } diff --git a/arch/openrisc/include/asm/pgtable.h b/arch/openrisc/include/asm/pgtable.h index 043505d7f68..37bf6a3ef8f 100644 --- a/arch/openrisc/include/asm/pgtable.h +++ b/arch/openrisc/include/asm/pgtable.h @@ -446,16 +446,12 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, #define kern_addr_valid(addr) (1) -#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ - remap_pfn_range(vma, vaddr, pfn, size, prot) - #include <asm-generic/pgtable.h> /* * No page table caches to initialise */ #define pgtable_cache_init() do { } while (0) -#define io_remap_page_range remap_page_range typedef pte_t *pte_addr_t; diff --git a/arch/openrisc/include/asm/processor.h b/arch/openrisc/include/asm/processor.h index bb54c97b978..cab746fa9e8 100644 --- a/arch/openrisc/include/asm/processor.h +++ b/arch/openrisc/include/asm/processor.h @@ -70,22 +70,15 @@ struct thread_struct { */ #define task_pt_regs(task) user_regs(task_thread_info(task)) -#define current_regs() user_regs(current_thread_info()) - -extern inline void prepare_to_copy(struct task_struct *tsk) -{ -} #define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack) #define INIT_THREAD { } -#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc); -#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp); - +#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc) +#define KSTK_ESP(tsk) (task_pt_regs(tsk)->sp) -extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp); void release_thread(struct task_struct *); @@ -107,7 +100,7 @@ extern unsigned long thread_saved_pc(struct task_struct *t); #define init_stack (init_thread_union.stack) -#define cpu_relax() do { } while (0) +#define cpu_relax() barrier() #endif /* __ASSEMBLY__ */ #endif /* __ASM_OPENRISC_PROCESSOR_H */ diff --git a/arch/openrisc/include/asm/prom.h b/arch/openrisc/include/asm/prom.h deleted file mode 100644 index e1f3fe26606..00000000000 --- a/arch/openrisc/include/asm/prom.h +++ /dev/null @@ -1,77 +0,0 @@ -/* - * OpenRISC Linux - * - * Linux architectural port borrowing liberally from similar works of - * others. All original copyrights apply as per the original source - * declaration. - * - * OpenRISC implementation: - * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> - * et al. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/of.h> /* linux/of.h gets to determine #include ordering */ - -#ifndef _ASM_OPENRISC_PROM_H -#define _ASM_OPENRISC_PROM_H -#ifdef __KERNEL__ -#ifndef __ASSEMBLY__ - -#include <linux/types.h> -#include <asm/irq.h> -#include <linux/atomic.h> -#include <linux/of_irq.h> -#include <linux/of_fdt.h> -#include <linux/of_address.h> -#include <linux/proc_fs.h> -#include <linux/platform_device.h> -#define HAVE_ARCH_DEVTREE_FIXUPS - -/* Other Prototypes */ -extern int early_uartlite_console(void); - -/* Parse the ibm,dma-window property of an OF node into the busno, phys and - * size parameters. - */ -void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, - unsigned long *busno, unsigned long *phys, unsigned long *size); - -extern void kdump_move_device_tree(void); - -/* CPU OF node matching */ -struct device_node *of_get_cpu_node(int cpu, unsigned int *thread); - -/* Get the MAC address */ -extern const void *of_get_mac_address(struct device_node *np); - -/** - * of_irq_map_pci - Resolve the interrupt for a PCI device - * @pdev: the device whose interrupt is to be resolved - * @out_irq: structure of_irq filled by this function - * - * This function resolves the PCI interrupt for a given PCI device. If a - * device-node exists for a given pci_dev, it will use normal OF tree - * walking. If not, it will implement standard swizzling and walk up the - * PCI tree until an device-node is found, at which point it will finish - * resolving using the OF tree walking. - */ -struct pci_dev; -extern int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq); - -/* This routine is here to provide compatibility with how powerpc - * handles IRQ mapping for OF device nodes. We precompute and permanently - * register them in the platform_device objects, whereas powerpc computes them - * on request. - */ -static inline void irq_dispose_mapping(unsigned int virq) -{ -} - -#endif /* __ASSEMBLY__ */ -#endif /* __KERNEL__ */ -#endif /* _ASM_OPENRISC_PROM_H */ diff --git a/arch/openrisc/include/asm/ptrace.h b/arch/openrisc/include/asm/ptrace.h index e612ce4512c..6ca17264c39 100644 --- a/arch/openrisc/include/asm/ptrace.h +++ b/arch/openrisc/include/asm/ptrace.h @@ -15,27 +15,12 @@ * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ - #ifndef __ASM_OPENRISC_PTRACE_H #define __ASM_OPENRISC_PTRACE_H -#include <asm/spr_defs.h> -#ifndef __ASSEMBLY__ -/* - * This is the layout of the regset returned by the GETREGSET ptrace call - */ -struct user_regs_struct { - /* GPR R0-R31... */ - unsigned long gpr[32]; - unsigned long pc; - unsigned long sr; - unsigned long pad1; - unsigned long pad2; -}; -#endif - -#ifdef __KERNEL__ +#include <asm/spr_defs.h> +#include <uapi/asm/ptrace.h> /* * Make kernel PTrace/register structures opaque to userspace... userspace can @@ -73,9 +58,13 @@ struct pt_regs { }; }; long pc; + /* For restarting system calls: + * Set to syscall number for syscall exceptions, + * -1 for all other exceptions. + */ long orig_gpr11; /* For restarting system calls */ - long syscallno; /* Syscall number (used by strace) */ long dummy; /* Cheap alignment fix */ + long dummy2; /* Cheap alignment fix */ }; /* TODO: Rename this to REDZONE because that's what it is */ @@ -132,6 +121,4 @@ static inline long regs_return_value(struct pt_regs *regs) #define PT_ORIG_GPR11 132 #define PT_SYSCALLNO 136 -#endif /* __KERNEL__ */ - #endif /* __ASM_OPENRISC_PTRACE_H */ diff --git a/arch/openrisc/include/asm/syscall.h b/arch/openrisc/include/asm/syscall.h index 9f0337055d2..b752bb67891 100644 --- a/arch/openrisc/include/asm/syscall.h +++ b/arch/openrisc/include/asm/syscall.h @@ -25,7 +25,7 @@ static inline int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) { - return regs->syscallno ? regs->syscallno : -1; + return regs->orig_gpr11; } static inline void @@ -50,10 +50,7 @@ static inline void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, int error, long val) { - if (error) - regs->gpr[11] = -error; - else - regs->gpr[11] = val; + regs->gpr[11] = (long) error ?: val; } static inline void diff --git a/arch/openrisc/include/asm/syscalls.h b/arch/openrisc/include/asm/syscalls.h index 84a978af44d..8ee816812a9 100644 --- a/arch/openrisc/include/asm/syscalls.h +++ b/arch/openrisc/include/asm/syscalls.h @@ -24,4 +24,11 @@ asmlinkage long sys_or1k_atomic(unsigned long type, unsigned long *v1, #include <asm-generic/syscalls.h> +asmlinkage long __sys_clone(unsigned long clone_flags, unsigned long newsp, + void __user *parent_tid, void __user *child_tid, int tls); +asmlinkage long __sys_fork(void); + +#define sys_clone __sys_clone +#define sys_fork __sys_fork + #endif /* __ASM_OPENRISC_SYSCALLS_H */ diff --git a/arch/openrisc/include/asm/thread_info.h b/arch/openrisc/include/asm/thread_info.h index 07a8bc080ef..d797acc901e 100644 --- a/arch/openrisc/include/asm/thread_info.h +++ b/arch/openrisc/include/asm/thread_info.h @@ -121,7 +121,6 @@ register struct thread_info *current_thread_info_reg asm("r10"); #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP) -#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) diff --git a/arch/openrisc/include/asm/uaccess.h b/arch/openrisc/include/asm/uaccess.h index c310e45b538..ab2e7a198a4 100644 --- a/arch/openrisc/include/asm/uaccess.h +++ b/arch/openrisc/include/asm/uaccess.h @@ -26,7 +26,6 @@ #include <linux/thread_info.h> #include <linux/prefetch.h> #include <linux/string.h> -#include <linux/thread_info.h> #include <asm/page.h> #define VERIFY_READ 0 @@ -314,42 +313,12 @@ clear_user(void *addr, unsigned long size) return size; } -extern int __strncpy_from_user(char *dst, const char *src, long count); - -static inline long strncpy_from_user(char *dst, const char *src, long count) -{ - if (access_ok(VERIFY_READ, src, 1)) - return __strncpy_from_user(dst, src, count); - return -EFAULT; -} - -/* - * Return the size of a string (including the ending 0) - * - * Return 0 for error - */ - -extern int __strnlen_user(const char *str, long len, unsigned long top); - -/* - * Returns the length of the string at str (including the null byte), - * or 0 if we hit a page we can't access, - * or something > len if we didn't find a null byte. - * - * The `top' parameter to __strnlen_user is to make sure that - * we can never overflow from the user area into kernel space. - */ -static inline long strnlen_user(const char __user *str, long len) -{ - unsigned long top = (unsigned long)get_fs(); - unsigned long res = 0; - - if (__addr_ok(str)) - res = __strnlen_user(str, len, top); +#define user_addr_max() \ + (segment_eq(get_fs(), USER_DS) ? TASK_SIZE : ~0UL) - return res; -} +extern long strncpy_from_user(char *dest, const char __user *src, long count); -#define strlen_user(str) strnlen_user(str, TASK_SIZE-1) +extern __must_check long strlen_user(const char __user *str); +extern __must_check long strnlen_user(const char __user *str, long n); #endif /* __ASM_OPENRISC_UACCESS_H */ diff --git a/arch/openrisc/include/uapi/asm/Kbuild b/arch/openrisc/include/uapi/asm/Kbuild new file mode 100644 index 00000000000..80761eb82b5 --- /dev/null +++ b/arch/openrisc/include/uapi/asm/Kbuild @@ -0,0 +1,10 @@ +# UAPI Header export list +include include/uapi/asm-generic/Kbuild.asm + +header-y += byteorder.h +header-y += elf.h +header-y += kvm_para.h +header-y += param.h +header-y += ptrace.h +header-y += sigcontext.h +header-y += unistd.h diff --git a/arch/openrisc/include/asm/byteorder.h b/arch/openrisc/include/uapi/asm/byteorder.h index 60d14f7e14e..60d14f7e14e 100644 --- a/arch/openrisc/include/asm/byteorder.h +++ b/arch/openrisc/include/uapi/asm/byteorder.h diff --git a/arch/openrisc/include/uapi/asm/elf.h b/arch/openrisc/include/uapi/asm/elf.h new file mode 100644 index 00000000000..f02ea583042 --- /dev/null +++ b/arch/openrisc/include/uapi/asm/elf.h @@ -0,0 +1,69 @@ +/* + * OpenRISC Linux + * + * Linux architectural port borrowing liberally from similar works of + * others. All original copyrights apply as per the original source + * declaration. + * + * OpenRISC implementation: + * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> + * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> + * et al. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef _UAPI__ASM_OPENRISC_ELF_H +#define _UAPI__ASM_OPENRISC_ELF_H + +/* + * This files is partially exported to userspace. This allows us to keep + * the ELF bits in one place which should assist in keeping the kernel and + * userspace in sync. + */ + +/* + * ELF register definitions.. + */ + +/* for struct user_regs_struct definition */ +#include <asm/ptrace.h> + +/* The OR1K relocation types... not all relevant for module loader */ +#define R_OR32_NONE 0 +#define R_OR32_32 1 +#define R_OR32_16 2 +#define R_OR32_8 3 +#define R_OR32_CONST 4 +#define R_OR32_CONSTH 5 +#define R_OR32_JUMPTARG 6 +#define R_OR32_VTINHERIT 7 +#define R_OR32_VTENTRY 8 + +typedef unsigned long elf_greg_t; + +/* + * Note that NGREG is defined to ELF_NGREG in include/linux/elfcore.h, and is + * thus exposed to user-space. + */ +#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t)) +typedef elf_greg_t elf_gregset_t[ELF_NGREG]; + +/* A placeholder; OR32 does not have fp support yes, so no fp regs for now. */ +typedef unsigned long elf_fpregset_t; + +/* This should be moved to include/linux/elf.h */ +#define EM_OR32 0x8472 +#define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */ + +/* + * These are used to set parameters in the core dumps. + */ +#define ELF_ARCH EM_OR32 +#define ELF_CLASS ELFCLASS32 +#define ELF_DATA ELFDATA2MSB + +#endif /* _UAPI__ASM_OPENRISC_ELF_H */ diff --git a/arch/openrisc/include/asm/param.h b/arch/openrisc/include/uapi/asm/param.h index c39a336610e..c39a336610e 100644 --- a/arch/openrisc/include/asm/param.h +++ b/arch/openrisc/include/uapi/asm/param.h diff --git a/arch/openrisc/include/asm/system.h b/arch/openrisc/include/uapi/asm/ptrace.h index cf658882186..9760bd17fbc 100644 --- a/arch/openrisc/include/asm/system.h +++ b/arch/openrisc/include/uapi/asm/ptrace.h @@ -16,20 +16,20 @@ * (at your option) any later version. */ -#ifndef __ASM_OPENRISC_SYSTEM_H -#define __ASM_OPENRISC_SYSTEM_H +#ifndef _UAPI__ASM_OPENRISC_PTRACE_H +#define _UAPI__ASM_OPENRISC_PTRACE_H -#ifdef __KERNEL__ #ifndef __ASSEMBLY__ - -#include <asm/spr.h> -#include <asm-generic/system.h> - -/* We probably need this definition, but the generic system.h provides it - * and it's not used on our arch anyway... +/* + * This is the layout of the regset returned by the GETREGSET ptrace call */ -/*#define nop() __asm__ __volatile__ ("l.nop"::)*/ +struct user_regs_struct { + /* GPR R0-R31... */ + unsigned long gpr[32]; + unsigned long pc; + unsigned long sr; +}; +#endif + -#endif /* __ASSEMBLY__ */ -#endif /* __KERNEL__ */ -#endif /* __ASM_OPENRISC_SYSTEM_H */ +#endif /* _UAPI__ASM_OPENRISC_PTRACE_H */ diff --git a/arch/openrisc/include/asm/sigcontext.h b/arch/openrisc/include/uapi/asm/sigcontext.h index b79c2b19afb..b79c2b19afb 100644 --- a/arch/openrisc/include/asm/sigcontext.h +++ b/arch/openrisc/include/uapi/asm/sigcontext.h diff --git a/arch/openrisc/include/asm/unistd.h b/arch/openrisc/include/uapi/asm/unistd.h index 89af3ab5c2e..ce40b71df00 100644 --- a/arch/openrisc/include/asm/unistd.h +++ b/arch/openrisc/include/uapi/asm/unistd.h @@ -16,16 +16,14 @@ * (at your option) any later version. */ -#if !defined(__ASM_OPENRISC_UNISTD_H) || defined(__SYSCALL) -#define __ASM_OPENRISC_UNISTD_H - #define __ARCH_HAVE_MMU #define sys_mmap2 sys_mmap_pgoff +#define __ARCH_WANT_SYS_FORK +#define __ARCH_WANT_SYS_CLONE + #include <asm-generic/unistd.h> #define __NR_or1k_atomic __NR_arch_specific_syscall __SYSCALL(__NR_or1k_atomic, sys_or1k_atomic) - -#endif /* __ASM_OPENRISC_UNISTD_H */ diff --git a/arch/openrisc/kernel/Makefile b/arch/openrisc/kernel/Makefile index 9a4c2706d79..ec6d9d37cef 100644 --- a/arch/openrisc/kernel/Makefile +++ b/arch/openrisc/kernel/Makefile @@ -2,10 +2,10 @@ # Makefile for the linux kernel. # -extra-y := head.o vmlinux.lds init_task.o +extra-y := head.o vmlinux.lds -obj-y := setup.o idle.o or32_ksyms.o process.o dma.o \ - traps.o time.o irq.o entry.o ptrace.o signal.o sys_or32.o \ +obj-y := setup.o or32_ksyms.o process.o dma.o \ + traps.o time.o irq.o entry.o ptrace.o signal.o \ sys_call_table.o obj-$(CONFIG_MODULES) += module.o diff --git a/arch/openrisc/kernel/asm-offsets.c b/arch/openrisc/kernel/asm-offsets.c index 1a242a0d758..ddb73685586 100644 --- a/arch/openrisc/kernel/asm-offsets.c +++ b/arch/openrisc/kernel/asm-offsets.c @@ -34,15 +34,11 @@ #include <linux/mm.h> #include <linux/io.h> #include <linux/thread_info.h> +#include <linux/kbuild.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/processor.h> -#define DEFINE(sym, val) \ - asm volatile("\n->" #sym " %0 " #val : : "i" (val)) - -#define BLANK() asm volatile("\n->" : : ) - int main(void) { /* offsets into the task_struct */ diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c index f1c8ee2895d..0b77ddb1ee0 100644 --- a/arch/openrisc/kernel/dma.c +++ b/arch/openrisc/kernel/dma.c @@ -21,13 +21,16 @@ #include <linux/dma-mapping.h> #include <linux/dma-debug.h> +#include <linux/export.h> +#include <linux/dma-attrs.h> #include <asm/cpuinfo.h> #include <asm/spr_defs.h> #include <asm/tlbflush.h> -static int page_set_nocache(pte_t *pte, unsigned long addr, - unsigned long next, struct mm_walk *walk) +static int +page_set_nocache(pte_t *pte, unsigned long addr, + unsigned long next, struct mm_walk *walk) { unsigned long cl; @@ -46,8 +49,9 @@ static int page_set_nocache(pte_t *pte, unsigned long addr, return 0; } -static int page_clear_nocache(pte_t *pte, unsigned long addr, - unsigned long next, struct mm_walk *walk) +static int +page_clear_nocache(pte_t *pte, unsigned long addr, + unsigned long next, struct mm_walk *walk) { pte_val(*pte) &= ~_PAGE_CI; @@ -67,9 +71,19 @@ static int page_clear_nocache(pte_t *pte, unsigned long addr, * cache-inhibit bit on those pages, and makes sure that the pages are * flushed out of the cache before they are used. * + * If the NON_CONSISTENT attribute is set, then this function just + * returns "normal", cachable memory. + * + * There are additional flags WEAK_ORDERING and WRITE_COMBINE to take + * into consideration here, too. All current known implementations of + * the OR1K support only strongly ordered memory accesses, so that flag + * is being ignored for now; uncached but write-combined memory is a + * missing feature of the OR1K. */ -void *or1k_dma_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp) +static void * +or1k_dma_alloc(struct device *dev, size_t size, + dma_addr_t *dma_handle, gfp_t gfp, + struct dma_attrs *attrs) { unsigned long va; void *page; @@ -87,20 +101,23 @@ void *or1k_dma_alloc_coherent(struct device *dev, size_t size, va = (unsigned long)page; - /* - * We need to iterate through the pages, clearing the dcache for - * them and setting the cache-inhibit bit. - */ - if (walk_page_range(va, va + size, &walk)) { - free_pages_exact(page, size); - return NULL; + if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) { + /* + * We need to iterate through the pages, clearing the dcache for + * them and setting the cache-inhibit bit. + */ + if (walk_page_range(va, va + size, &walk)) { + free_pages_exact(page, size); + return NULL; + } } return (void *)va; } -void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr, - dma_addr_t dma_handle) +static void +or1k_dma_free(struct device *dev, size_t size, void *vaddr, + dma_addr_t dma_handle, struct dma_attrs *attrs) { unsigned long va = (unsigned long)vaddr; struct mm_walk walk = { @@ -108,16 +125,19 @@ void or1k_dma_free_coherent(struct device *dev, size_t size, void *vaddr, .mm = &init_mm }; - /* walk_page_range shouldn't be able to fail here */ - WARN_ON(walk_page_range(va, va + size, &walk)); + if (!dma_get_attr(DMA_ATTR_NON_CONSISTENT, attrs)) { + /* walk_page_range shouldn't be able to fail here */ + WARN_ON(walk_page_range(va, va + size, &walk)); + } free_pages_exact(vaddr, size); } -dma_addr_t or1k_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, - enum dma_data_direction dir, - struct dma_attrs *attrs) +static dma_addr_t +or1k_map_page(struct device *dev, struct page *page, + unsigned long offset, size_t size, + enum dma_data_direction dir, + struct dma_attrs *attrs) { unsigned long cl; dma_addr_t addr = page_to_phys(page) + offset; @@ -147,16 +167,18 @@ dma_addr_t or1k_map_page(struct device *dev, struct page *page, return addr; } -void or1k_unmap_page(struct device *dev, dma_addr_t dma_handle, - size_t size, enum dma_data_direction dir, - struct dma_attrs *attrs) +static void +or1k_unmap_page(struct device *dev, dma_addr_t dma_handle, + size_t size, enum dma_data_direction dir, + struct dma_attrs *attrs) { /* Nothing special to do here... */ } -int or1k_map_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - struct dma_attrs *attrs) +static int +or1k_map_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + struct dma_attrs *attrs) { struct scatterlist *s; int i; @@ -169,9 +191,10 @@ int or1k_map_sg(struct device *dev, struct scatterlist *sg, return nents; } -void or1k_unmap_sg(struct device *dev, struct scatterlist *sg, - int nents, enum dma_data_direction dir, - struct dma_attrs *attrs) +static void +or1k_unmap_sg(struct device *dev, struct scatterlist *sg, + int nents, enum dma_data_direction dir, + struct dma_attrs *attrs) { struct scatterlist *s; int i; @@ -181,9 +204,10 @@ void or1k_unmap_sg(struct device *dev, struct scatterlist *sg, } } -void or1k_sync_single_for_cpu(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir) +static void +or1k_sync_single_for_cpu(struct device *dev, + dma_addr_t dma_handle, size_t size, + enum dma_data_direction dir) { unsigned long cl; dma_addr_t addr = dma_handle; @@ -193,9 +217,10 @@ void or1k_sync_single_for_cpu(struct device *dev, mtspr(SPR_DCBIR, cl); } -void or1k_sync_single_for_device(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir) +static void +or1k_sync_single_for_device(struct device *dev, + dma_addr_t dma_handle, size_t size, + enum dma_data_direction dir) { unsigned long cl; dma_addr_t addr = dma_handle; @@ -205,6 +230,18 @@ void or1k_sync_single_for_device(struct device *dev, mtspr(SPR_DCBFR, cl); } +struct dma_map_ops or1k_dma_map_ops = { + .alloc = or1k_dma_alloc, + .free = or1k_dma_free, + .map_page = or1k_map_page, + .unmap_page = or1k_unmap_page, + .map_sg = or1k_map_sg, + .unmap_sg = or1k_unmap_sg, + .sync_single_for_cpu = or1k_sync_single_for_cpu, + .sync_single_for_device = or1k_sync_single_for_device, +}; +EXPORT_SYMBOL(or1k_dma_map_ops); + /* Number of entries preallocated for DMA-API debugging */ #define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16) diff --git a/arch/openrisc/kernel/entry.S b/arch/openrisc/kernel/entry.S index d5f9c35a583..fec8bf97d80 100644 --- a/arch/openrisc/kernel/entry.S +++ b/arch/openrisc/kernel/entry.S @@ -95,7 +95,6 @@ handler: ;\ /* r1, EPCR, ESR a already saved */ ;\ l.sw PT_GPR2(r1),r2 ;\ l.sw PT_GPR3(r1),r3 ;\ - l.sw PT_ORIG_GPR11(r1),r11 ;\ /* r4 already save */ ;\ l.sw PT_GPR5(r1),r5 ;\ l.sw PT_GPR6(r1),r6 ;\ @@ -125,7 +124,9 @@ handler: ;\ /* r30 already save */ ;\ /* l.sw PT_GPR30(r1),r30*/ ;\ l.sw PT_GPR31(r1),r31 ;\ - l.sw PT_SYSCALLNO(r1),r0 + /* Store -1 in orig_gpr11 for non-syscall exceptions */ ;\ + l.addi r30,r0,-1 ;\ + l.sw PT_ORIG_GPR11(r1),r30 #define UNHANDLED_EXCEPTION(handler,vector) \ .global handler ;\ @@ -133,7 +134,6 @@ handler: ;\ /* r1, EPCR, ESR already saved */ ;\ l.sw PT_GPR2(r1),r2 ;\ l.sw PT_GPR3(r1),r3 ;\ - l.sw PT_ORIG_GPR11(r1),r11 ;\ l.sw PT_GPR5(r1),r5 ;\ l.sw PT_GPR6(r1),r6 ;\ l.sw PT_GPR7(r1),r7 ;\ @@ -162,7 +162,9 @@ handler: ;\ /* r31 already saved */ ;\ l.sw PT_GPR30(r1),r30 ;\ /* l.sw PT_GPR31(r1),r31 */ ;\ - l.sw PT_SYSCALLNO(r1),r0 ;\ + /* Store -1 in orig_gpr11 for non-syscall exceptions */ ;\ + l.addi r30,r0,-1 ;\ + l.sw PT_ORIG_GPR11(r1),r30 ;\ l.addi r3,r1,0 ;\ /* r4 is exception EA */ ;\ l.addi r5,r0,vector ;\ @@ -199,12 +201,17 @@ EXCEPTION_ENTRY(_bus_fault_handler) l.nop /* ---[ 0x300: Data Page Fault exception ]------------------------------- */ +EXCEPTION_ENTRY(_dtlb_miss_page_fault_handler) + l.and r5,r5,r0 + l.j 1f + l.nop EXCEPTION_ENTRY(_data_page_fault_handler) /* set up parameters for do_page_fault */ + l.ori r5,r0,0x300 // exception vector +1: l.addi r3,r1,0 // pt_regs /* r4 set be EXCEPTION_HANDLE */ // effective address of fault - l.ori r5,r0,0x300 // exception vector /* * __PHX__: TODO @@ -274,12 +281,17 @@ EXCEPTION_ENTRY(_data_page_fault_handler) l.nop /* ---[ 0x400: Insn Page Fault exception ]------------------------------- */ +EXCEPTION_ENTRY(_itlb_miss_page_fault_handler) + l.and r5,r5,r0 + l.j 1f + l.nop EXCEPTION_ENTRY(_insn_page_fault_handler) /* set up parameters for do_page_fault */ + l.ori r5,r0,0x400 // exception vector +1: l.addi r3,r1,0 // pt_regs /* r4 set be EXCEPTION_HANDLE */ // effective address of fault - l.ori r5,r0,0x400 // exception vector l.ori r6,r0,0x0 // !write access /* call fault.c handler in or32/mm/fault.c */ @@ -554,6 +566,7 @@ ENTRY(_sys_call_handler) l.sw PT_GPR9(r1),r9 /* r10 already saved */ l.sw PT_GPR11(r1),r11 + /* orig_gpr11 must be set for syscalls */ l.sw PT_ORIG_GPR11(r1),r11 /* r12,r13 already saved */ @@ -567,9 +580,6 @@ ENTRY(_sys_call_handler) /* r30 is the only register we clobber in the fast path */ /* r30 already saved */ /* l.sw PT_GPR30(r1),r30 */ - /* This is used by do_signal to determine whether to check for - * syscall restart or not */ - l.sw PT_SYSCALLNO(r1),r11 _syscall_check_trace_enter: /* If TIF_SYSCALL_TRACE is set, then we want to do syscall tracing */ @@ -731,7 +741,7 @@ _syscall_trace_enter: * so that we can do the syscall for real and return to the syscall * hot path. */ - l.lwz r11,PT_SYSCALLNO(r1) + l.lwz r11,PT_GPR11(r1) l.lwz r3,PT_GPR3(r1) l.lwz r4,PT_GPR4(r1) l.lwz r5,PT_GPR5(r1) @@ -843,37 +853,44 @@ UNHANDLED_EXCEPTION(_vector_0x1f00,0x1f00) /* ========================================================[ return ] === */ +_resume_userspace: + DISABLE_INTERRUPTS(r3,r4) + l.lwz r4,TI_FLAGS(r10) + l.andi r13,r4,_TIF_WORK_MASK + l.sfeqi r13,0 + l.bf _restore_all + l.nop + _work_pending: - /* - * if (current_thread_info->flags & _TIF_NEED_RESCHED) - * schedule(); - */ - l.lwz r5,TI_FLAGS(r10) - l.andi r3,r5,_TIF_NEED_RESCHED - l.sfnei r3,0 - l.bnf _work_notifysig + l.lwz r5,PT_ORIG_GPR11(r1) + l.sfltsi r5,0 + l.bnf 1f l.nop - l.jal schedule + l.andi r5,r5,0 +1: + l.jal do_work_pending + l.ori r3,r1,0 /* pt_regs */ + + l.sfeqi r11,0 + l.bf _restore_all l.nop - l.j _resume_userspace + l.sfltsi r11,0 + l.bnf 1f l.nop - -/* Handle pending signals and notify-resume requests. - * do_notify_resume must be passed the latest pushed pt_regs, not - * necessarily the "userspace" ones. Also, pt_regs->syscallno - * must be set so that the syscall restart functionality works. - */ -_work_notifysig: - l.jal do_notify_resume - l.ori r3,r1,0 /* pt_regs */ - -_resume_userspace: - DISABLE_INTERRUPTS(r3,r4) - l.lwz r3,TI_FLAGS(r10) - l.andi r3,r3,_TIF_WORK_MASK - l.sfnei r3,0 - l.bf _work_pending + l.and r11,r11,r0 + l.ori r11,r11,__NR_restart_syscall + l.j _syscall_check_trace_enter l.nop +1: + l.lwz r11,PT_ORIG_GPR11(r1) + /* Restore arg registers */ + l.lwz r3,PT_GPR3(r1) + l.lwz r4,PT_GPR4(r1) + l.lwz r5,PT_GPR5(r1) + l.lwz r6,PT_GPR6(r1) + l.lwz r7,PT_GPR7(r1) + l.j _syscall_check_trace_enter + l.lwz r8,PT_GPR8(r1) _restore_all: RESTORE_ALL @@ -894,6 +911,16 @@ ENTRY(ret_from_fork) l.jal schedule_tail l.nop + /* Check if we are a kernel thread */ + l.sfeqi r20,0 + l.bf 1f + l.nop + + /* ...we are a kernel thread so invoke the requested callback */ + l.jalr r20 + l.or r3,r22,r0 + +1: /* _syscall_returns expect r11 to contain return value */ l.lwz r11,PT_GPR11(r1) @@ -915,26 +942,6 @@ ENTRY(ret_from_fork) l.j _syscall_return l.nop -/* Since syscalls don't save call-clobbered registers, the args to - * kernel_thread_helper will need to be passed through callee-saved - * registers and copied to the parameter registers when the thread - * begins running. - * - * See arch/openrisc/kernel/process.c: - * The args are passed as follows: - * arg1 (r3) : passed in r20 - * arg2 (r4) : passed in r22 - */ - -ENTRY(_kernel_thread_helper) - l.or r3,r20,r0 - l.or r4,r22,r0 - l.movhi r31,hi(kernel_thread_helper) - l.ori r31,r31,lo(kernel_thread_helper) - l.jr r31 - l.nop - - /* ========================================================[ switch ] === */ /* @@ -1044,8 +1051,13 @@ ENTRY(_switch) /* Unwind stack to pre-switch state */ l.addi r1,r1,(INT_FRAME_SIZE) - /* Return via the link-register back to where we 'came from', where that can be - * either schedule() or return_from_fork()... */ + /* Return via the link-register back to where we 'came from', where + * that may be either schedule(), ret_from_fork(), or + * ret_from_kernel_thread(). If we are returning to a new thread, + * we are expected to have set up the arg to schedule_tail already, + * hence we do so here unconditionally: + */ + l.lwz r3,TI_TASK(r3) /* Load 'prev' as schedule_tail arg */ l.jr r9 l.nop @@ -1076,26 +1088,18 @@ _fork_save_extra_regs_and_call: l.jr r29 l.sw PT_GPR28(r1),r28 -ENTRY(sys_clone) - l.movhi r29,hi(_sys_clone) - l.ori r29,r29,lo(_sys_clone) +ENTRY(__sys_clone) + l.movhi r29,hi(sys_clone) + l.ori r29,r29,lo(sys_clone) l.j _fork_save_extra_regs_and_call l.addi r7,r1,0 -ENTRY(sys_fork) - l.movhi r29,hi(_sys_fork) - l.ori r29,r29,lo(_sys_fork) +ENTRY(__sys_fork) + l.movhi r29,hi(sys_fork) + l.ori r29,r29,lo(sys_fork) l.j _fork_save_extra_regs_and_call l.addi r3,r1,0 -ENTRY(sys_execve) - l.j _sys_execve - l.addi r6,r1,0 - -ENTRY(sys_sigaltstack) - l.j _sys_sigaltstack - l.addi r5,r1,0 - ENTRY(sys_rt_sigreturn) l.j _sys_rt_sigreturn l.addi r3,r1,0 @@ -1117,10 +1121,10 @@ ENTRY(sys_rt_sigreturn) ENTRY(sys_or1k_atomic) /* FIXME: This ignores r3 and always does an XCHG */ DISABLE_INTERRUPTS(r17,r19) - l.lwz r30,0(r4) - l.lwz r28,0(r5) - l.sw 0(r4),r28 - l.sw 0(r5),r30 + l.lwz r29,0(r4) + l.lwz r27,0(r5) + l.sw 0(r4),r27 + l.sw 0(r5),r29 ENABLE_INTERRUPTS(r17) l.jr r9 l.or r11,r0,r0 diff --git a/arch/openrisc/kernel/head.S b/arch/openrisc/kernel/head.S index c75018d2264..1d3c9c28ac2 100644 --- a/arch/openrisc/kernel/head.S +++ b/arch/openrisc/kernel/head.S @@ -19,6 +19,7 @@ #include <linux/threads.h> #include <linux/errno.h> #include <linux/init.h> +#include <linux/serial_reg.h> #include <asm/processor.h> #include <asm/page.h> #include <asm/mmu.h> @@ -26,6 +27,7 @@ #include <asm/cache.h> #include <asm/spr_defs.h> #include <asm/asm-offsets.h> +#include <linux/of_fdt.h> #define tophys(rd,rs) \ l.movhi rd,hi(-KERNELBASE) ;\ @@ -290,9 +292,9 @@ /* Jump to .init code at _start which lives in the .head section * and will be discarded after boot. */ - LOAD_SYMBOL_2_GPR(r4, _start) - tophys (r3,r4) /* MMU disabled */ - l.jr r3 + LOAD_SYMBOL_2_GPR(r15, _start) + tophys (r13,r15) /* MMU disabled */ + l.jr r13 l.nop /* ---[ 0x200: BUS exception ]------------------------------------------- */ @@ -440,6 +442,9 @@ _dispatch_do_ipage_fault: __HEAD .global _start _start: + /* save kernel parameters */ + l.or r25,r0,r3 /* pointer to fdt */ + /* * ensure a deterministic start */ @@ -471,7 +476,6 @@ _start: CLEAR_GPR(r22) CLEAR_GPR(r23) CLEAR_GPR(r24) - CLEAR_GPR(r25) CLEAR_GPR(r26) CLEAR_GPR(r27) CLEAR_GPR(r28) @@ -565,6 +569,18 @@ enable_mmu: // reset the simulation counters l.nop 5 + /* check fdt header magic word */ + l.lwz r3,0(r25) /* load magic from fdt into r3 */ + l.movhi r4,hi(OF_DT_HEADER) + l.ori r4,r4,lo(OF_DT_HEADER) + l.sfeq r3,r4 + l.bf _fdt_found + l.nop + /* magic number mismatch, set fdt pointer to null */ + l.or r25,r0,r0 +_fdt_found: + /* pass fdt pointer to or32_early_setup in r3 */ + l.or r3,r0,r25 LOAD_SYMBOL_2_GPR(r24, or32_early_setup) l.jalr r24 l.nop @@ -1054,8 +1070,7 @@ d_pte_not_present: EXCEPTION_LOAD_GPR4 EXCEPTION_LOAD_GPR5 EXCEPTION_LOAD_GPR6 - l.j _dispatch_do_dpage_fault - l.nop + EXCEPTION_HANDLE(_dtlb_miss_page_fault_handler) /* ==============================================[ ITLB miss handler ]=== */ ENTRY(itlb_miss_handler) @@ -1177,8 +1192,7 @@ i_pte_not_present: EXCEPTION_LOAD_GPR4 EXCEPTION_LOAD_GPR5 EXCEPTION_LOAD_GPR6 - l.j _dispatch_do_ipage_fault - l.nop + EXCEPTION_HANDLE(_itlb_miss_page_fault_handler) /* ==============================================[ boot tlb handlers ]=== */ diff --git a/arch/openrisc/kernel/idle.c b/arch/openrisc/kernel/idle.c deleted file mode 100644 index e5fc7887783..00000000000 --- a/arch/openrisc/kernel/idle.c +++ /dev/null @@ -1,79 +0,0 @@ -/* - * OpenRISC idle.c - * - * Linux architectural port borrowing liberally from similar works of - * others. All original copyrights apply as per the original source - * declaration. - * - * Modifications for the OpenRISC architecture: - * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> - * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * Idle daemon for or32. Idle daemon will handle any action - * that needs to be taken when the system becomes idle. - */ - -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/smp.h> -#include <linux/stddef.h> -#include <linux/unistd.h> -#include <linux/ptrace.h> -#include <linux/slab.h> -#include <linux/tick.h> - -#include <asm/pgtable.h> -#include <asm/uaccess.h> -#include <asm/system.h> -#include <asm/io.h> -#include <asm/processor.h> -#include <asm/mmu.h> -#include <asm/cache.h> -#include <asm/pgalloc.h> - -void (*powersave) (void) = NULL; - -static inline void pm_idle(void) -{ - barrier(); -} - -void cpu_idle(void) -{ - set_thread_flag(TIF_POLLING_NRFLAG); - - /* endless idle loop with no priority at all */ - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - - while (!need_resched()) { - check_pgt_cache(); - rmb(); - - clear_thread_flag(TIF_POLLING_NRFLAG); - - local_irq_disable(); - /* Don't trace irqs off for idle */ - stop_critical_timings(); - if (!need_resched() && powersave != NULL) - powersave(); - start_critical_timings(); - local_irq_enable(); - set_thread_flag(TIF_POLLING_NRFLAG); - } - - rcu_idle_exit(); - tick_nohz_idle_exit(); - preempt_enable_no_resched(); - schedule(); - preempt_disable(); - } -} diff --git a/arch/openrisc/kernel/init_task.c b/arch/openrisc/kernel/init_task.c deleted file mode 100644 index ca534082d5f..00000000000 --- a/arch/openrisc/kernel/init_task.c +++ /dev/null @@ -1,42 +0,0 @@ -/* - * OpenRISC init_task.c - * - * Linux architectural port borrowing liberally from similar works of - * others. All original copyrights apply as per the original source - * declaration. - * - * Modifications for the OpenRISC architecture: - * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> - * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - */ - -#include <linux/init_task.h> -#include <linux/mqueue.h> -#include <linux/export.h> - -static struct signal_struct init_signals = INIT_SIGNALS(init_signals); -static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand); - -/* - * Initial thread structure. - * - * We need to make sure that this is THREAD_SIZE aligned due to the - * way process stacks are handled. This is done by having a special - * "init_task" linker map entry.. - */ -union thread_union init_thread_union __init_task_data = { - INIT_THREAD_INFO(init_task) -}; - -/* - * Initial task structure. - * - * All other task structs will be allocated on slabs in fork.c - */ -struct task_struct init_task = INIT_TASK(init_task); -EXPORT_SYMBOL(init_task); diff --git a/arch/openrisc/kernel/irq.c b/arch/openrisc/kernel/irq.c index 4bfead22095..8ec77bc9f1e 100644 --- a/arch/openrisc/kernel/irq.c +++ b/arch/openrisc/kernel/irq.c @@ -14,17 +14,13 @@ * 2 of the License, or (at your option) any later version. */ -#include <linux/ptrace.h> -#include <linux/errno.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/of.h> #include <linux/ftrace.h> #include <linux/irq.h> -#include <linux/seq_file.h> -#include <linux/kernel_stat.h> #include <linux/export.h> - +#include <linux/irqdomain.h> #include <linux/irqflags.h> /* read interrupt enabled status */ @@ -50,19 +46,19 @@ EXPORT_SYMBOL(arch_local_irq_restore); static void or1k_pic_mask(struct irq_data *data) { - mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->irq)); + mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq)); } static void or1k_pic_unmask(struct irq_data *data) { - mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (1UL << data->irq)); + mtspr(SPR_PICMR, mfspr(SPR_PICMR) | (1UL << data->hwirq)); } static void or1k_pic_ack(struct irq_data *data) { /* EDGE-triggered interrupts need to be ack'ed in order to clear * the latch. - * LEVER-triggered interrupts do not need to be ack'ed; however, + * LEVEL-triggered interrupts do not need to be ack'ed; however, * ack'ing the interrupt has no ill-effect and is quicker than * trying to figure out what type it is... */ @@ -79,10 +75,10 @@ static void or1k_pic_ack(struct irq_data *data) * as opposed to a 1 as mandated by the spec */ - mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->irq)); + mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq)); #else - WARN(1, "Interrupt handling possibily broken\n"); - mtspr(SPR_PICSR, (1UL << irq)); + WARN(1, "Interrupt handling possibly broken\n"); + mtspr(SPR_PICSR, (1UL << data->hwirq)); #endif } @@ -91,13 +87,16 @@ static void or1k_pic_mask_ack(struct irq_data *data) /* Comments for pic_ack apply here, too */ #ifdef CONFIG_OR1K_1200 - mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->irq)); + mtspr(SPR_PICMR, mfspr(SPR_PICMR) & ~(1UL << data->hwirq)); + mtspr(SPR_PICSR, mfspr(SPR_PICSR) & ~(1UL << data->hwirq)); #else - WARN(1, "Interrupt handling possibily broken\n"); - mtspr(SPR_PICSR, (1UL << irq)); + WARN(1, "Interrupt handling possibly broken\n"); + mtspr(SPR_PICMR, (1UL << data->hwirq)); + mtspr(SPR_PICSR, (1UL << data->hwirq)); #endif } +#if 0 static int or1k_pic_set_type(struct irq_data *data, unsigned int flow_type) { /* There's nothing to do in the PIC configuration when changing @@ -107,43 +106,64 @@ static int or1k_pic_set_type(struct irq_data *data, unsigned int flow_type) return irq_setup_alt_chip(data, flow_type); } +#endif + +static struct irq_chip or1k_dev = { + .name = "or1k-PIC", + .irq_unmask = or1k_pic_unmask, + .irq_mask = or1k_pic_mask, + .irq_ack = or1k_pic_ack, + .irq_mask_ack = or1k_pic_mask_ack, +}; + +static struct irq_domain *root_domain; static inline int pic_get_irq(int first) { - int irq; + int hwirq; - irq = ffs(mfspr(SPR_PICSR) >> first); + hwirq = ffs(mfspr(SPR_PICSR) >> first); + if (!hwirq) + return NO_IRQ; + else + hwirq = hwirq + first -1; - return irq ? irq + first - 1 : NO_IRQ; + return irq_find_mapping(root_domain, hwirq); } -static void __init or1k_irq_init(void) + +static int or1k_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) { - struct irq_chip_generic *gc; - struct irq_chip_type *ct; + irq_set_chip_and_handler_name(irq, &or1k_dev, + handle_level_irq, "level"); + irq_set_status_flags(irq, IRQ_LEVEL | IRQ_NOPROBE); - /* Disable all interrupts until explicitly requested */ - mtspr(SPR_PICMR, (0UL)); + return 0; +} - gc = irq_alloc_generic_chip("or1k-PIC", 1, 0, 0, handle_level_irq); - ct = gc->chip_types; +static const struct irq_domain_ops or1k_irq_domain_ops = { + .xlate = irq_domain_xlate_onecell, + .map = or1k_map, +}; - ct->chip.irq_unmask = or1k_pic_unmask; - ct->chip.irq_mask = or1k_pic_mask; - ct->chip.irq_ack = or1k_pic_ack; - ct->chip.irq_mask_ack = or1k_pic_mask_ack; - ct->chip.irq_set_type = or1k_pic_set_type; +/* + * This sets up the IRQ domain for the PIC built in to the OpenRISC + * 1000 CPU. This is the "root" domain as these are the interrupts + * that directly trigger an exception in the CPU. + */ +static void __init or1k_irq_init(void) +{ + struct device_node *intc = NULL; - /* The OR1K PIC can handle both level and edge trigged - * interrupts in roughly the same manner - */ -#if 0 - /* FIXME: chip.type??? */ - ct->chip.type = IRQ_TYPE_EDGE_BOTH | IRQ_TYPE_LEVEL_MASK; -#endif + /* The interrupt controller device node is mandatory */ + intc = of_find_compatible_node(NULL, NULL, "opencores,or1k-pic"); + BUG_ON(!intc); - irq_setup_generic_chip(gc, IRQ_MSK(NR_IRQS), 0, - IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE); + /* Disable all interrupts until explicitly requested */ + mtspr(SPR_PICMR, (0UL)); + + root_domain = irq_domain_add_linear(intc, 32, + &or1k_irq_domain_ops, NULL); } void __init init_IRQ(void) @@ -164,10 +184,3 @@ void __irq_entry do_IRQ(struct pt_regs *regs) irq_exit(); set_irq_regs(old_regs); } - -unsigned int irq_create_of_mapping(struct device_node *controller, - const u32 *intspec, unsigned int intsize) -{ - return intspec[0]; -} -EXPORT_SYMBOL_GPL(irq_create_of_mapping); diff --git a/arch/openrisc/kernel/module.c b/arch/openrisc/kernel/module.c index 10ff50f0202..ef872ae4c87 100644 --- a/arch/openrisc/kernel/module.c +++ b/arch/openrisc/kernel/module.c @@ -47,12 +47,10 @@ int apply_relocate_add(Elf32_Shdr *sechdrs, *location = value; break; case R_OR32_CONST: - location = (uint16_t *)location + 1; - *((uint16_t *)location) = (uint16_t) (value); + *((uint16_t *)location + 1) = value; break; case R_OR32_CONSTH: - location = (uint16_t *)location + 1; - *((uint16_t *)location) = (uint16_t) (value >> 16); + *((uint16_t *)location + 1) = value >> 16; break; case R_OR32_JUMPTARG: value -= (uint32_t)location; diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c index e4209af879e..386af258591 100644 --- a/arch/openrisc/kernel/process.c +++ b/arch/openrisc/kernel/process.c @@ -38,7 +38,6 @@ #include <asm/uaccess.h> #include <asm/pgtable.h> -#include <asm/system.h> #include <asm/io.h> #include <asm/processor.h> #include <asm/spr_defs.h> @@ -91,6 +90,7 @@ void show_regs(struct pt_regs *regs) { extern void show_registers(struct pt_regs *regs); + show_regs_print_info(KERN_DEFAULT); /* __PHX__ cleanup this mess */ show_registers(regs); } @@ -110,66 +110,83 @@ void release_thread(struct task_struct *dead_task) */ extern asmlinkage void ret_from_fork(void); +/* + * copy_thread + * @clone_flags: flags + * @usp: user stack pointer or fn for kernel thread + * @arg: arg to fn for kernel thread; always NULL for userspace thread + * @p: the newly created task + * @regs: CPU context to copy for userspace thread; always NULL for kthread + * + * At the top of a newly initialized kernel stack are two stacked pt_reg + * structures. The first (topmost) is the userspace context of the thread. + * The second is the kernelspace context of the thread. + * + * A kernel thread will not be returning to userspace, so the topmost pt_regs + * struct can be uninitialized; it _does_ need to exist, though, because + * a kernel thread can become a userspace thread by doing a kernel_execve, in + * which case the topmost context will be initialized and used for 'returning' + * to userspace. + * + * The second pt_reg struct needs to be initialized to 'return' to + * ret_from_fork. A kernel thread will need to set r20 to the address of + * a function to call into (with arg in r22); userspace threads need to set + * r20 to NULL in which case ret_from_fork will just continue a return to + * userspace. + * + * A kernel thread 'fn' may return; this is effectively what happens when + * kernel_execve is called. In that case, the userspace pt_regs must have + * been initialized (which kernel_execve takes care of, see start_thread + * below); ret_from_fork will then continue its execution causing the + * 'kernel thread' to return to userspace as a userspace thread. + */ + int copy_thread(unsigned long clone_flags, unsigned long usp, - unsigned long unused, struct task_struct *p, struct pt_regs *regs) + unsigned long arg, struct task_struct *p) { - struct pt_regs *childregs; + struct pt_regs *userregs; struct pt_regs *kregs; unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE; - struct thread_info *ti; unsigned long top_of_kernel_stack; top_of_kernel_stack = sp; p->set_child_tid = p->clear_child_tid = NULL; - /* Copy registers */ - /* redzone */ - sp -= STACK_FRAME_OVERHEAD; + /* Locate userspace context on stack... */ + sp -= STACK_FRAME_OVERHEAD; /* redzone */ sp -= sizeof(struct pt_regs); - childregs = (struct pt_regs *)sp; + userregs = (struct pt_regs *) sp; - /* Copy parent registers */ - *childregs = *regs; + /* ...and kernel context */ + sp -= STACK_FRAME_OVERHEAD; /* redzone */ + sp -= sizeof(struct pt_regs); + kregs = (struct pt_regs *)sp; - if ((childregs->sr & SPR_SR_SM) == 1) { - /* for kernel thread, set `current_thread_info' - * and stackptr in new task - */ - childregs->sp = (unsigned long)task_stack_page(p) + THREAD_SIZE; - childregs->gpr[10] = (unsigned long)task_thread_info(p); + if (unlikely(p->flags & PF_KTHREAD)) { + memset(kregs, 0, sizeof(struct pt_regs)); + kregs->gpr[20] = usp; /* fn, kernel thread */ + kregs->gpr[22] = arg; } else { - childregs->sp = usp; - } - - childregs->gpr[11] = 0; /* Result from fork() */ + *userregs = *current_pt_regs(); - /* - * The way this works is that at some point in the future - * some task will call _switch to switch to the new task. - * That will pop off the stack frame created below and start - * the new task running at ret_from_fork. The new task will - * do some house keeping and then return from the fork or clone - * system call, using the stack frame created above. - */ - /* redzone */ - sp -= STACK_FRAME_OVERHEAD; - sp -= sizeof(struct pt_regs); - kregs = (struct pt_regs *)sp; + if (usp) + userregs->sp = usp; + userregs->gpr[11] = 0; /* Result from fork() */ - ti = task_thread_info(p); - ti->ksp = sp; + kregs->gpr[20] = 0; /* Userspace thread */ + } - /* kregs->sp must store the location of the 'pre-switch' kernel stack - * pointer... for a newly forked process, this is simply the top of - * the kernel stack. + /* + * _switch wants the kernel stack page in pt_regs->sp so that it + * can restore it to thread_info->ksp... see _switch for details. */ kregs->sp = top_of_kernel_stack; - kregs->gpr[3] = (unsigned long)current; /* arg to schedule_tail */ - kregs->gpr[10] = (unsigned long)task_thread_info(p); kregs->gpr[9] = (unsigned long)ret_from_fork; + task_thread_info(p)->ksp = (unsigned long)kregs; + return 0; } @@ -178,16 +195,14 @@ copy_thread(unsigned long clone_flags, unsigned long usp, */ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp) { - unsigned long sr = regs->sr & ~SPR_SR_SM; + unsigned long sr = mfspr(SPR_SR) & ~SPR_SR_SM; set_fs(USER_DS); - memset(regs->gpr, 0, sizeof(regs->gpr)); + memset(regs, 0, sizeof(struct pt_regs)); regs->pc = pc; regs->sr = sr; regs->sp = sp; - -/* printk("start thread, ksp = %lx\n", current_thread_info()->ksp);*/ } /* Fill in the fpu structure for a core dump. */ @@ -238,74 +253,9 @@ void dump_elf_thread(elf_greg_t *dest, struct pt_regs* regs) dest[35] = 0; } -extern void _kernel_thread_helper(void); - -void __noreturn kernel_thread_helper(int (*fn) (void *), void *arg) -{ - do_exit(fn(arg)); -} - -/* - * Create a kernel thread. - */ -int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags) -{ - struct pt_regs regs; - - memset(®s, 0, sizeof(regs)); - - regs.gpr[20] = (unsigned long)fn; - regs.gpr[22] = (unsigned long)arg; - regs.sr = mfspr(SPR_SR); - regs.pc = (unsigned long)_kernel_thread_helper; - - return do_fork(flags | CLONE_VM | CLONE_UNTRACED, - 0, ®s, 0, NULL, NULL); -} - -/* - * sys_execve() executes a new program. - */ -asmlinkage long _sys_execve(const char __user *name, - const char __user * const __user *argv, - const char __user * const __user *envp, - struct pt_regs *regs) -{ - int error; - char *filename; - - filename = getname(name); - error = PTR_ERR(filename); - - if (IS_ERR(filename)) - goto out; - - error = do_execve(filename, argv, envp, regs); - putname(filename); - -out: - return error; -} - unsigned long get_wchan(struct task_struct *p) { /* TODO */ return 0; } - -int kernel_execve(const char *filename, char *const argv[], char *const envp[]) -{ - register long __res asm("r11") = __NR_execve; - register long __a asm("r3") = (long)(filename); - register long __b asm("r4") = (long)(argv); - register long __c asm("r5") = (long)(envp); - __asm__ volatile ("l.sys 1" - : "=r" (__res), "=r"(__a), "=r"(__b), "=r"(__c) - : "0"(__res), "1"(__a), "2"(__b), "3"(__c) - : "r6", "r7", "r8", "r12", "r13", "r15", - "r17", "r19", "r21", "r23", "r25", "r27", - "r29", "r31"); - __asm__ volatile ("l.nop"); - return __res; -} diff --git a/arch/openrisc/kernel/prom.c b/arch/openrisc/kernel/prom.c index 3d4478f6c94..6a44340d1b1 100644 --- a/arch/openrisc/kernel/prom.c +++ b/arch/openrisc/kernel/prom.c @@ -18,90 +18,15 @@ * */ -#include <stdarg.h> -#include <linux/kernel.h> -#include <linux/string.h> #include <linux/init.h> -#include <linux/threads.h> -#include <linux/spinlock.h> #include <linux/types.h> -#include <linux/pci.h> -#include <linux/stringify.h> -#include <linux/delay.h> -#include <linux/initrd.h> -#include <linux/bitops.h> -#include <linux/module.h> -#include <linux/kexec.h> -#include <linux/debugfs.h> -#include <linux/irq.h> #include <linux/memblock.h> #include <linux/of_fdt.h> -#include <asm/prom.h> #include <asm/page.h> -#include <asm/processor.h> -#include <asm/irq.h> -#include <linux/io.h> -#include <asm/system.h> -#include <asm/mmu.h> -#include <asm/pgtable.h> -#include <asm/sections.h> -#include <asm/setup.h> - -extern char cmd_line[COMMAND_LINE_SIZE]; - -void __init early_init_dt_add_memory_arch(u64 base, u64 size) -{ - size &= PAGE_MASK; - memblock_add(base, size); -} - -void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) -{ - return __va(memblock_alloc(size, align)); -} void __init early_init_devtree(void *params) { - void *alloc; - - /* Setup flat device-tree pointer */ - initial_boot_params = params; - - - /* Retrieve various informations from the /chosen node of the - * device-tree, including the platform type, initrd location and - * size, TCE reserve, and more ... - */ - of_scan_flat_dt(early_init_dt_scan_chosen, cmd_line); - - /* Scan memory nodes and rebuild MEMBLOCKs */ - of_scan_flat_dt(early_init_dt_scan_root, NULL); - of_scan_flat_dt(early_init_dt_scan_memory, NULL); - - /* Save command line for /proc/cmdline and then parse parameters */ - strlcpy(boot_command_line, cmd_line, COMMAND_LINE_SIZE); - + early_init_dt_scan(params); memblock_allow_resize(); - - /* We must copy the flattend device tree from init memory to regular - * memory because the device tree references the strings in it - * directly. - */ - - alloc = __va(memblock_alloc(initial_boot_params->totalsize, PAGE_SIZE)); - - memcpy(alloc, initial_boot_params, initial_boot_params->totalsize); - - initial_boot_params = alloc; -} - -#ifdef CONFIG_BLK_DEV_INITRD -void __init early_init_dt_setup_initrd_arch(unsigned long start, - unsigned long end) -{ - initrd_start = (unsigned long)__va(start); - initrd_end = (unsigned long)__va(end); - initrd_below_start_ok = 1; } -#endif diff --git a/arch/openrisc/kernel/ptrace.c b/arch/openrisc/kernel/ptrace.c index 7259047d5f9..71a2a0c34c6 100644 --- a/arch/openrisc/kernel/ptrace.c +++ b/arch/openrisc/kernel/ptrace.c @@ -33,7 +33,6 @@ #include <asm/segment.h> #include <asm/page.h> #include <asm/pgtable.h> -#include <asm/system.h> /* * Copy the thread state to a regset that can be interpreted by userspace. @@ -188,11 +187,11 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs) */ ret = -1L; - audit_syscall_entry(audit_arch(), regs->syscallno, + audit_syscall_entry(AUDIT_ARCH_OPENRISC, regs->gpr[11], regs->gpr[3], regs->gpr[4], regs->gpr[5], regs->gpr[6]); - return ret ? : regs->syscallno; + return ret ? : regs->gpr[11]; } asmlinkage void do_syscall_trace_leave(struct pt_regs *regs) diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c index 1422f747f52..4fc7ccc0a2c 100644 --- a/arch/openrisc/kernel/setup.c +++ b/arch/openrisc/kernel/setup.c @@ -40,8 +40,8 @@ #include <linux/device.h> #include <linux/of_platform.h> +#include <asm/sections.h> #include <asm/segment.h> -#include <asm/system.h> #include <asm/pgtable.h> #include <asm/types.h> #include <asm/setup.h> @@ -51,8 +51,6 @@ #include "vmlinux.h" -char __initdata cmd_line[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; - static unsigned long __init setup_memory(void) { unsigned long bootmap_size; @@ -78,7 +76,7 @@ static unsigned long __init setup_memory(void) ram_start_pfn = PFN_UP(memory_start); /* free_ram_start_pfn is first page after kernel */ - free_ram_start_pfn = PFN_UP(__pa(&_end)); + free_ram_start_pfn = PFN_UP(__pa(_end)); ram_end_pfn = PFN_DOWN(memblock_end_of_DRAM()); max_pfn = ram_end_pfn; @@ -207,18 +205,18 @@ void __init setup_cpuinfo(void) * Handles the pointer to the device tree that this kernel is to use * for establishing the available platform devices. * - * For now, this is limited to using the built-in device tree. In the future, - * it is intended that this function will take a pointer to the device tree - * that is potentially built-in, but potentially also passed in by the - * bootloader, or discovered by some equally clever means... + * Falls back on built-in device tree in case null pointer is passed. */ -void __init or32_early_setup(void) +void __init or32_early_setup(void *fdt) { - - early_init_devtree(__dtb_start); - - printk(KERN_INFO "Compiled-in FDT at 0x%p\n", __dtb_start); + if (fdt) + pr_info("FDT at %p\n", fdt); + else { + fdt = __dtb_start; + pr_info("Compiled-in FDT at %p\n", fdt); + } + early_init_devtree(fdt); } static int __init openrisc_device_probe(void) @@ -268,7 +266,7 @@ void __init detect_unit_config(unsigned long upr, unsigned long mask, * */ -void __cpuinit calibrate_delay(void) +void calibrate_delay(void) { const int *val; struct device_node *cpu = NULL; @@ -286,15 +284,15 @@ void __init setup_arch(char **cmdline_p) { unsigned long max_low_pfn; - unflatten_device_tree(); + unflatten_and_copy_device_tree(); setup_cpuinfo(); /* process 1's initial memory region is the kernel code/data */ - init_mm.start_code = (unsigned long)&_stext; - init_mm.end_code = (unsigned long)&_etext; - init_mm.end_data = (unsigned long)&_edata; - init_mm.brk = (unsigned long)&_end; + init_mm.start_code = (unsigned long)_stext; + init_mm.end_code = (unsigned long)_etext; + init_mm.end_data = (unsigned long)_edata; + init_mm.brk = (unsigned long)_end; #ifdef CONFIG_BLK_DEV_INITRD initrd_start = (unsigned long)&__initrd_start; @@ -317,7 +315,7 @@ void __init setup_arch(char **cmdline_p) conswitchp = &dummy_con; #endif - *cmdline_p = cmd_line; + *cmdline_p = boot_command_line; printk(KERN_INFO "OpenRISC Linux -- http://openrisc.net\n"); } diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c index 95207ab0c99..66775bc07a8 100644 --- a/arch/openrisc/kernel/signal.c +++ b/arch/openrisc/kernel/signal.c @@ -28,32 +28,24 @@ #include <linux/tracehook.h> #include <asm/processor.h> +#include <asm/syscall.h> #include <asm/ucontext.h> #include <asm/uaccess.h> #define DEBUG_SIG 0 -#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) - -asmlinkage long -_sys_sigaltstack(const stack_t *uss, stack_t *uoss, struct pt_regs *regs) -{ - return do_sigaltstack(uss, uoss, regs->sp); -} - struct rt_sigframe { - struct siginfo *pinfo; - void *puc; struct siginfo info; struct ucontext uc; unsigned char retcode[16]; /* trampoline code */ }; -static int restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc) +static int restore_sigcontext(struct pt_regs *regs, + struct sigcontext __user *sc) { - unsigned int err = 0; + int err = 0; - /* Alwys make any pending restarted system call return -EINTR */ + /* Always make any pending restarted system calls return -EINTR */ current_thread_info()->restart_block.fn = do_no_restart_syscall; /* @@ -61,32 +53,27 @@ static int restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc) * (sc is already checked for VERIFY_READ since the sigframe was * checked in sys_sigreturn previously) */ - if (__copy_from_user(regs, sc->regs.gpr, 32 * sizeof(unsigned long))) - goto badframe; - if (__copy_from_user(®s->pc, &sc->regs.pc, sizeof(unsigned long))) - goto badframe; - if (__copy_from_user(®s->sr, &sc->regs.sr, sizeof(unsigned long))) - goto badframe; + err |= __copy_from_user(regs, sc->regs.gpr, 32 * sizeof(unsigned long)); + err |= __copy_from_user(®s->pc, &sc->regs.pc, sizeof(unsigned long)); + err |= __copy_from_user(®s->sr, &sc->regs.sr, sizeof(unsigned long)); /* make sure the SM-bit is cleared so user-mode cannot fool us */ regs->sr &= ~SPR_SR_SM; + regs->orig_gpr11 = -1; /* Avoid syscall restart checks */ + /* TODO: the other ports use regs->orig_XX to disable syscall checks * after this completes, but we don't use that mechanism. maybe we can * use it now ? */ return err; - -badframe: - return 1; } asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs) { struct rt_sigframe *frame = (struct rt_sigframe __user *)regs->sp; sigset_t set; - stack_t st; /* * Since we stacked the signal on a dword boundary, @@ -101,20 +88,13 @@ asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs) if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set))) goto badframe; - sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) goto badframe; - if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st))) + if (restore_altstack(&frame->uc.uc_stack)) goto badframe; - /* It is more difficult to avoid calling this function than to - call it and ignore errors. */ - do_sigaltstack(&st, NULL, regs->sp); return regs->gpr[11]; @@ -127,21 +107,18 @@ badframe: * Set up a signal frame. */ -static int setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, - unsigned long mask) +static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc) { int err = 0; /* copy the regs */ - + /* There should be no need to save callee-saved registers here... + * ...but we save them anyway. Revisit this + */ err |= __copy_to_user(sc->regs.gpr, regs, 32 * sizeof(unsigned long)); err |= __copy_to_user(&sc->regs.pc, ®s->pc, sizeof(unsigned long)); err |= __copy_to_user(&sc->regs.sr, ®s->sr, sizeof(unsigned long)); - /* then some other stuff */ - - err |= __put_user(mask, &sc->oldmask); - return err; } @@ -189,89 +166,70 @@ static inline void __user *get_sigframe(struct k_sigaction *ka, * trampoline which performs the syscall sigreturn, or a provided * user-mode trampoline. */ -static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, - sigset_t *set, struct pt_regs *regs) +static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, + struct pt_regs *regs) { struct rt_sigframe *frame; unsigned long return_ip; int err = 0; - frame = get_sigframe(ka, regs, sizeof(*frame)); + frame = get_sigframe(&ksig->ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) - goto give_sigsegv; - - err |= __put_user(&frame->info, &frame->pinfo); - err |= __put_user(&frame->uc, &frame->puc); + return -EFAULT; - if (ka->sa.sa_flags & SA_SIGINFO) - err |= copy_siginfo_to_user(&frame->info, info); - if (err) - goto give_sigsegv; + /* Create siginfo. */ + if (ksig->ka.sa.sa_flags & SA_SIGINFO) + err |= copy_siginfo_to_user(&frame->info, &ksig->info); - /* Clear all the bits of the ucontext we don't use. */ - err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext)); + /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); err |= __put_user(NULL, &frame->uc.uc_link); - err |= __put_user((void *)current->sas_ss_sp, - &frame->uc.uc_stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags); - err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); - err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]); + err |= __save_altstack(&frame->uc.uc_stack, regs->sp); + err |= setup_sigcontext(regs, &frame->uc.uc_mcontext); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); if (err) - goto give_sigsegv; + return -EFAULT; /* trampoline - the desired return ip is the retcode itself */ return_ip = (unsigned long)&frame->retcode; - /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */ - err |= __put_user(0xa960, (short *)(frame->retcode + 0)); - err |= __put_user(__NR_rt_sigreturn, (short *)(frame->retcode + 2)); + /* This is: + l.ori r11,r0,__NR_sigreturn + l.sys 1 + */ + err |= __put_user(0xa960, (short *)(frame->retcode + 0)); + err |= __put_user(__NR_rt_sigreturn, (short *)(frame->retcode + 2)); err |= __put_user(0x20000001, (unsigned long *)(frame->retcode + 4)); err |= __put_user(0x15000000, (unsigned long *)(frame->retcode + 8)); if (err) - goto give_sigsegv; + return -EFAULT; /* TODO what is the current->exec_domain stuff and invmap ? */ /* Set up registers for signal handler */ - regs->pc = (unsigned long)ka->sa.sa_handler; /* what we enter NOW */ + regs->pc = (unsigned long)ksig->ka.sa.sa_handler; /* what we enter NOW */ regs->gpr[9] = (unsigned long)return_ip; /* what we enter LATER */ - regs->gpr[3] = (unsigned long)sig; /* arg 1: signo */ + regs->gpr[3] = (unsigned long)ksig->sig; /* arg 1: signo */ regs->gpr[4] = (unsigned long)&frame->info; /* arg 2: (siginfo_t*) */ regs->gpr[5] = (unsigned long)&frame->uc; /* arg 3: ucontext */ /* actually move the usp to reflect the stacked frame */ regs->sp = (unsigned long)frame; - return; - -give_sigsegv: - if (sig == SIGSEGV) - ka->sa.sa_handler = SIG_DFL; - force_sig(SIGSEGV, current); + return 0; } static inline void -handle_signal(unsigned long sig, - siginfo_t *info, struct k_sigaction *ka, - sigset_t *oldset, struct pt_regs *regs) +handle_signal(struct ksignal *ksig, struct pt_regs *regs) { - setup_rt_frame(sig, ka, info, oldset, regs); + int ret; - if (ka->sa.sa_flags & SA_ONESHOT) - ka->sa.sa_handler = SIG_DFL; + ret = setup_rt_frame(ksig, sigmask_to_save(), regs); - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, sig); - recalc_sigpending(); - - spin_unlock_irq(¤t->sighand->siglock); + signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP)); } /* @@ -286,104 +244,99 @@ handle_signal(unsigned long sig, * mode below. */ -void do_signal(struct pt_regs *regs) +int do_signal(struct pt_regs *regs, int syscall) { - siginfo_t info; - int signr; - struct k_sigaction ka; - - /* - * We want the common case to go fast, which - * is why we may in certain cases get here from - * kernel mode. Just return without doing anything - * if so. - */ - if (!user_mode(regs)) - return; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - - /* If we are coming out of a syscall then we need - * to check if the syscall was interrupted and wants to be - * restarted after handling the signal. If so, the original - * syscall number is put back into r11 and the PC rewound to - * point at the l.sys instruction that resulted in the - * original syscall. Syscall results other than the four - * below mean that the syscall executed to completion and no - * restart is necessary. - */ - if (regs->syscallno) { - int restart = 0; - - switch (regs->gpr[11]) { + struct ksignal ksig; + unsigned long continue_addr = 0; + unsigned long restart_addr = 0; + unsigned long retval = 0; + int restart = 0; + + if (syscall) { + continue_addr = regs->pc; + restart_addr = continue_addr - 4; + retval = regs->gpr[11]; + + /* + * Setup syscall restart here so that a debugger will + * see the already changed PC. + */ + switch (retval) { case -ERESTART_RESTARTBLOCK: + restart = -2; + /* Fall through */ case -ERESTARTNOHAND: - /* Restart if there is no signal handler */ - restart = (signr <= 0); - break; case -ERESTARTSYS: - /* Restart if there no signal handler or - * SA_RESTART flag is set */ - restart = (signr <= 0 || (ka.sa.sa_flags & SA_RESTART)); - break; case -ERESTARTNOINTR: - /* Always restart */ - restart = 1; + restart++; + regs->gpr[11] = regs->orig_gpr11; + regs->pc = restart_addr; break; } - - if (restart) { - if (regs->gpr[11] == -ERESTART_RESTARTBLOCK) - regs->gpr[11] = __NR_restart_syscall; - else - regs->gpr[11] = regs->orig_gpr11; - regs->pc -= 4; - } else { - regs->gpr[11] = -EINTR; - } } - if (signr <= 0) { - /* no signal to deliver so we just put the saved sigmask - * back */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); - sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); + /* + * Get the signal to deliver. During the call to get_signal the + * debugger may change all our registers so we may need to revert + * the decision to restart the syscall; specifically, if the PC is + * changed, don't restart the syscall. + */ + if (get_signal(&ksig)) { + if (unlikely(restart) && regs->pc == restart_addr) { + if (retval == -ERESTARTNOHAND || + retval == -ERESTART_RESTARTBLOCK + || (retval == -ERESTARTSYS + && !(ksig.ka.sa.sa_flags & SA_RESTART))) { + /* No automatic restart */ + regs->gpr[11] = -EINTR; + regs->pc = continue_addr; + } + } + handle_signal(&ksig, regs); + } else { + /* no handler */ + restore_saved_sigmask(); + /* + * Restore pt_regs PC as syscall restart will be handled by + * kernel without return to userspace + */ + if (unlikely(restart) && regs->pc == restart_addr) { + regs->pc = continue_addr; + return restart; } - - } else { /* signr > 0 */ - sigset_t *oldset; - - if (current_thread_info()->flags & _TIF_RESTORE_SIGMASK) - oldset = ¤t->saved_sigmask; - else - oldset = ¤t->blocked; - - /* Whee! Actually deliver the signal. */ - handle_signal(signr, &info, &ka, oldset, regs); - /* a signal was successfully delivered; the saved - * sigmask will have been stored in the signal frame, - * and will be restored by sigreturn, so we can simply - * clear the TIF_RESTORE_SIGMASK flag */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - - tracehook_signal_handler(signr, &info, &ka, regs, - test_thread_flag(TIF_SINGLESTEP)); } - return; + return 0; } -asmlinkage void do_notify_resume(struct pt_regs *regs) +asmlinkage int +do_work_pending(struct pt_regs *regs, unsigned int thread_flags, int syscall) { - if (current_thread_info()->flags & _TIF_SIGPENDING) - do_signal(regs); - - if (current_thread_info()->flags & _TIF_NOTIFY_RESUME) { - clear_thread_flag(TIF_NOTIFY_RESUME); - tracehook_notify_resume(regs); - if (current->replacement_session_keyring) - key_replace_session_keyring(); - } + do { + if (likely(thread_flags & _TIF_NEED_RESCHED)) { + schedule(); + } else { + if (unlikely(!user_mode(regs))) + return 0; + local_irq_enable(); + if (thread_flags & _TIF_SIGPENDING) { + int restart = do_signal(regs, syscall); + if (unlikely(restart)) { + /* + * Restart without handlers. + * Deal with it without leaving + * the kernel space. + */ + return restart; + } + syscall = 0; + } else { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + } + } + local_irq_disable(); + thread_flags = current_thread_info()->flags; + } while (thread_flags & _TIF_WORK_MASK); + return 0; } diff --git a/arch/openrisc/kernel/sys_or32.c b/arch/openrisc/kernel/sys_or32.c deleted file mode 100644 index 57060084c0c..00000000000 --- a/arch/openrisc/kernel/sys_or32.c +++ /dev/null @@ -1,57 +0,0 @@ -/* - * OpenRISC sys_or32.c - * - * Linux architectural port borrowing liberally from similar works of - * others. All original copyrights apply as per the original source - * declaration. - * - * Modifications for the OpenRISC architecture: - * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> - * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * This file contains various random system calls that - * have a non-standard calling sequence on some platforms. - * Since we don't have to do any backwards compatibility, our - * versions are done in the most "normal" way possible. - */ - -#include <linux/errno.h> -#include <linux/syscalls.h> -#include <linux/mm.h> - -#include <asm/syscalls.h> - -/* These are secondary entry points as the primary entry points are defined in - * entry.S where we add the 'regs' parameter value - */ - -asmlinkage long _sys_clone(unsigned long clone_flags, unsigned long newsp, - int __user *parent_tid, int __user *child_tid, - struct pt_regs *regs) -{ - long ret; - - /* FIXME: Is alignment necessary? */ - /* newsp = ALIGN(newsp, 4); */ - - if (!newsp) - newsp = regs->sp; - - ret = do_fork(clone_flags, newsp, regs, 0, parent_tid, child_tid); - - return ret; -} - -asmlinkage int _sys_fork(struct pt_regs *regs) -{ -#ifdef CONFIG_MMU - return do_fork(SIGCHLD, regs->sp, regs, 0, NULL, NULL); -#else - return -EINVAL; -#endif -} diff --git a/arch/openrisc/kernel/time.c b/arch/openrisc/kernel/time.c index bd946ef1623..7c52e9494a8 100644 --- a/arch/openrisc/kernel/time.c +++ b/arch/openrisc/kernel/time.c @@ -125,16 +125,13 @@ irqreturn_t __irq_entry timer_interrupt(struct pt_regs *regs) static __init void openrisc_clockevent_init(void) { - clockevents_calc_mult_shift(&clockevent_openrisc_timer, - cpuinfo.clock_frequency, 4); + clockevent_openrisc_timer.cpumask = cpumask_of(0); /* We only have 28 bits */ - clockevent_openrisc_timer.max_delta_ns = - clockevent_delta2ns((u32) 0x0fffffff, &clockevent_openrisc_timer); - clockevent_openrisc_timer.min_delta_ns = - clockevent_delta2ns(1, &clockevent_openrisc_timer); - clockevent_openrisc_timer.cpumask = cpumask_of(0); - clockevents_register_device(&clockevent_openrisc_timer); + clockevents_config_and_register(&clockevent_openrisc_timer, + cpuinfo.clock_frequency, + 100, 0x0fffffff); + } /** diff --git a/arch/openrisc/kernel/traps.c b/arch/openrisc/kernel/traps.c index a4ec44a052b..3d3f6062f49 100644 --- a/arch/openrisc/kernel/traps.c +++ b/arch/openrisc/kernel/traps.c @@ -33,7 +33,6 @@ #include <linux/kallsyms.h> #include <asm/uaccess.h> -#include <asm/system.h> #include <asm/segment.h> #include <asm/io.h> #include <asm/pgtable.h> @@ -106,16 +105,6 @@ void show_trace_task(struct task_struct *tsk) */ } -/* - * The architecture-independent backtrace generator - */ -void dump_stack(void) -{ - unsigned long stack; - - show_stack(current, &stack); -} - void show_registers(struct pt_regs *regs) { int i; @@ -145,8 +134,8 @@ void show_registers(struct pt_regs *regs) regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]); printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n", regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]); - printk(" RES: %08lx oGPR11: %08lx syscallno: %08lx\n", - regs->gpr[11], regs->orig_gpr11, regs->syscallno); + printk(" RES: %08lx oGPR11: %08lx\n", + regs->gpr[11], regs->orig_gpr11); printk("Process %s (pid: %d, stackpage=%08lx)\n", current->comm, current->pid, (unsigned long)current); @@ -207,8 +196,8 @@ void nommu_dump_state(struct pt_regs *regs, regs->gpr[24], regs->gpr[25], regs->gpr[26], regs->gpr[27]); printk("GPR28: %08lx GPR29: %08lx GPR30: %08lx GPR31: %08lx\n", regs->gpr[28], regs->gpr[29], regs->gpr[30], regs->gpr[31]); - printk(" RES: %08lx oGPR11: %08lx syscallno: %08lx\n", - regs->gpr[11], regs->orig_gpr11, regs->syscallno); + printk(" RES: %08lx oGPR11: %08lx\n", + regs->gpr[11], regs->orig_gpr11); printk("Process %s (pid: %d, stackpage=%08lx)\n", ((struct task_struct *)(__pa(current)))->comm, diff --git a/arch/openrisc/kernel/vmlinux.h b/arch/openrisc/kernel/vmlinux.h index ee842a2d3f3..bbcdf21b0b3 100644 --- a/arch/openrisc/kernel/vmlinux.h +++ b/arch/openrisc/kernel/vmlinux.h @@ -1,12 +1,8 @@ #ifndef __OPENRISC_VMLINUX_H_ #define __OPENRISC_VMLINUX_H_ -extern char _stext, _etext, _edata, _end; #ifdef CONFIG_BLK_DEV_INITRD extern char __initrd_start, __initrd_end; -extern char __initramfs_start; #endif -extern u32 __dtb_start[]; - #endif diff --git a/arch/openrisc/lib/delay.c b/arch/openrisc/lib/delay.c index 01d9740ae6f..c82b09f4a10 100644 --- a/arch/openrisc/lib/delay.c +++ b/arch/openrisc/lib/delay.c @@ -22,7 +22,7 @@ #include <asm/timex.h> #include <asm/processor.h> -int __devinit read_current_timer(unsigned long *timer_value) +int read_current_timer(unsigned long *timer_value) { *timer_value = mfspr(SPR_TTCR); return 0; @@ -30,9 +30,9 @@ int __devinit read_current_timer(unsigned long *timer_value) void __delay(unsigned long cycles) { - cycles_t target = get_cycles() + cycles; + cycles_t start = get_cycles(); - while (get_cycles() < target) + while ((get_cycles() - start) < cycles) cpu_relax(); } EXPORT_SYMBOL(__delay); @@ -41,7 +41,7 @@ inline void __const_udelay(unsigned long xloops) { unsigned long long loops; - loops = xloops * loops_per_jiffy * HZ; + loops = (unsigned long long)xloops * loops_per_jiffy * HZ; __delay(loops >> 32); } diff --git a/arch/openrisc/lib/string.S b/arch/openrisc/lib/string.S index 465f04bc7de..c09fee7dec1 100644 --- a/arch/openrisc/lib/string.S +++ b/arch/openrisc/lib/string.S @@ -103,102 +103,3 @@ __clear_user: .section __ex_table, "a" .long 9b, 99b // write fault .previous - -/* - * long strncpy_from_user(char *dst, const char *src, long count) - * - * - */ - .global __strncpy_from_user -__strncpy_from_user: - l.addi r1,r1,-16 - l.sw 0(r1),r6 - l.sw 4(r1),r5 - l.sw 8(r1),r4 - l.sw 12(r1),r3 - - l.addi r11,r5,0 -2: l.sfeq r5,r0 - l.bf 1f - l.addi r5,r5,-1 -8: l.lbz r6,0(r4) - l.sfeq r6,r0 - l.bf 1f -9: l.sb 0(r3),r6 - l.addi r3,r3,1 - l.j 2b - l.addi r4,r4,1 -1: - l.lwz r6,0(r1) - l.addi r5,r5,1 - l.sub r11,r11,r5 // r11 holds the return value - - l.lwz r6,0(r1) - l.lwz r5,4(r1) - l.lwz r4,8(r1) - l.lwz r3,12(r1) - l.jr r9 - l.addi r1,r1,16 - - .section .fixup, "ax" -99: - l.movhi r11,hi(-EFAULT) - l.ori r11,r11,lo(-EFAULT) - - l.lwz r6,0(r1) - l.lwz r5,4(r1) - l.lwz r4,8(r1) - l.lwz r3,12(r1) - l.jr r9 - l.addi r1,r1,16 - .previous - - .section __ex_table, "a" - .long 8b, 99b // read fault - .previous - -/* - * extern int __strnlen_user(const char *str, long len, unsigned long top); - * - * - * RTRN: - length of a string including NUL termination character - * - on page fault 0 - */ - - .global __strnlen_user -__strnlen_user: - l.addi r1,r1,-8 - l.sw 0(r1),r6 - l.sw 4(r1),r3 - - l.addi r11,r0,0 -2: l.sfeq r11,r4 - l.bf 1f - l.addi r11,r11,1 -8: l.lbz r6,0(r3) - l.sfeq r6,r0 - l.bf 1f - l.sfgeu r3,r5 // are we over the top ? - l.bf 99f - l.j 2b - l.addi r3,r3,1 - -1: - l.lwz r6,0(r1) - l.lwz r3,4(r1) - l.jr r9 - l.addi r1,r1,8 - - .section .fixup, "ax" -99: - l.addi r11,r0,0 - - l.lwz r6,0(r1) - l.lwz r3,4(r1) - l.jr r9 - l.addi r1,r1,8 - .previous - - .section __ex_table, "a" - .long 8b, 99b // read fault - .previous diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c index a5dce82f864..0703acf7d32 100644 --- a/arch/openrisc/mm/fault.c +++ b/arch/openrisc/mm/fault.c @@ -54,6 +54,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, struct vm_area_struct *vma; siginfo_t info; int fault; + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; tsk = current; @@ -85,6 +86,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, if (user_mode(regs)) { /* Exception was in userspace: reenable interrupts */ local_irq_enable(); + flags |= FAULT_FLAG_USER; } else { /* If exception was in a syscall, then IRQ's may have * been enabled or disabled. If they were enabled, @@ -105,6 +107,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address, if (in_interrupt() || !mm) goto no_context; +retry: down_read(&mm->mmap_sem); vma = find_vma(mm, address); @@ -143,6 +146,7 @@ good_area: if (write_acc) { if (!(vma->vm_flags & VM_WRITE)) goto bad_area; + flags |= FAULT_FLAG_WRITE; } else { /* not present */ if (!(vma->vm_flags & (VM_READ | VM_EXEC))) @@ -159,7 +163,11 @@ good_area: * the fault. */ - fault = handle_mm_fault(mm, vma, address, write_acc); + fault = handle_mm_fault(mm, vma, address, flags); + + if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) + return; + if (unlikely(fault & VM_FAULT_ERROR)) { if (fault & VM_FAULT_OOM) goto out_of_memory; @@ -167,11 +175,25 @@ good_area: goto do_sigbus; BUG(); } - /*RGD modeled on Cris */ - if (fault & VM_FAULT_MAJOR) - tsk->maj_flt++; - else - tsk->min_flt++; + + if (flags & FAULT_FLAG_ALLOW_RETRY) { + /*RGD modeled on Cris */ + if (fault & VM_FAULT_MAJOR) + tsk->maj_flt++; + else + tsk->min_flt++; + if (fault & VM_FAULT_RETRY) { + flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; + + /* No need to up_read(&mm->mmap_sem) as we would + * have already released it in __lock_page_or_retry + * in mm/filemap.c. + */ + + goto retry; + } + } up_read(&mm->mmap_sem); return; @@ -246,10 +268,10 @@ out_of_memory: __asm__ __volatile__("l.nop 1"); up_read(&mm->mmap_sem); - printk("VM: killing process %s\n", tsk->comm); - if (user_mode(regs)) - do_exit(SIGKILL); - goto no_context; + if (!user_mode(regs)) + goto no_context; + pagefault_out_of_memory(); + return; do_sigbus: up_read(&mm->mmap_sem); diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c index 359dcb20fe8..7f94652311d 100644 --- a/arch/openrisc/mm/init.c +++ b/arch/openrisc/mm/init.c @@ -33,7 +33,6 @@ #include <linux/pagemap.h> #include <linux/memblock.h> -#include <asm/system.h> #include <asm/segment.h> #include <asm/pgalloc.h> #include <asm/pgtable.h> @@ -44,6 +43,7 @@ #include <asm/kmap_types.h> #include <asm/fixmap.h> #include <asm/tlbflush.h> +#include <asm/sections.h> int mem_init_done; @@ -168,15 +168,26 @@ void __init paging_init(void) unsigned long *dtlb_vector = __va(0x900); unsigned long *itlb_vector = __va(0xa00); + printk(KERN_INFO "itlb_miss_handler %p\n", &itlb_miss_handler); + *itlb_vector = ((unsigned long)&itlb_miss_handler - + (unsigned long)itlb_vector) >> 2; + + /* Soft ordering constraint to ensure that dtlb_vector is + * the last thing updated + */ + barrier(); + printk(KERN_INFO "dtlb_miss_handler %p\n", &dtlb_miss_handler); *dtlb_vector = ((unsigned long)&dtlb_miss_handler - (unsigned long)dtlb_vector) >> 2; - printk(KERN_INFO "itlb_miss_handler %p\n", &itlb_miss_handler); - *itlb_vector = ((unsigned long)&itlb_miss_handler - - (unsigned long)itlb_vector) >> 2; } + /* Soft ordering constraint to ensure that cache invalidation and + * TLB flush really happen _after_ code has been modified. + */ + barrier(); + /* Invalidate instruction caches after code modification */ mtspr(SPR_ICBIR, 0x900); mtspr(SPR_ICBIR, 0xa00); @@ -191,60 +202,20 @@ void __init paging_init(void) /* References to section boundaries */ -extern char _stext, _etext, _edata, __bss_start, _end; -extern char __init_begin, __init_end; - -static int __init free_pages_init(void) -{ - int reservedpages, pfn; - - /* this will put all low memory onto the freelists */ - totalram_pages = free_all_bootmem(); - - reservedpages = 0; - for (pfn = 0; pfn < max_low_pfn; pfn++) { - /* - * Only count reserved RAM pages - */ - if (PageReserved(mem_map + pfn)) - reservedpages++; - } - - return reservedpages; -} - -static void __init set_max_mapnr_init(void) -{ - max_mapnr = num_physpages = max_low_pfn; -} - void __init mem_init(void) { - int codesize, reservedpages, datasize, initsize; - - if (!mem_map) - BUG(); - - set_max_mapnr_init(); + BUG_ON(!mem_map); + max_mapnr = max_low_pfn; high_memory = (void *)__va(max_low_pfn * PAGE_SIZE); /* clear the zero-page */ memset((void *)empty_zero_page, 0, PAGE_SIZE); - reservedpages = free_pages_init(); - - codesize = (unsigned long)&_etext - (unsigned long)&_stext; - datasize = (unsigned long)&_edata - (unsigned long)&_etext; - initsize = (unsigned long)&__init_end - (unsigned long)&__init_begin; + /* this will put all low memory onto the freelists */ + free_all_bootmem(); - printk(KERN_INFO - "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init, %ldk highmem)\n", - (unsigned long)nr_free_pages() << (PAGE_SHIFT - 10), - max_mapnr << (PAGE_SHIFT - 10), codesize >> 10, - reservedpages << (PAGE_SHIFT - 10), datasize >> 10, - initsize >> 10, (unsigned long)(0 << (PAGE_SHIFT - 10)) - ); + mem_init_print_info(NULL); printk("mem_init_done ...........................................\n"); mem_init_done = 1; @@ -254,30 +225,11 @@ void __init mem_init(void) #ifdef CONFIG_BLK_DEV_INITRD void free_initrd_mem(unsigned long start, unsigned long end) { - printk(KERN_INFO "Freeing initrd memory: %ldk freed\n", - (end - start) >> 10); - - for (; start < end; start += PAGE_SIZE) { - ClearPageReserved(virt_to_page(start)); - init_page_count(virt_to_page(start)); - free_page(start); - totalram_pages++; - } + free_reserved_area((void *)start, (void *)end, -1, "initrd"); } #endif void free_initmem(void) { - unsigned long addr; - - addr = (unsigned long)(&__init_begin); - for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { - ClearPageReserved(virt_to_page(addr)); - init_page_count(virt_to_page(addr)); - free_page(addr); - totalram_pages++; - } - printk(KERN_INFO "Freeing unused kernel memory: %luk freed\n", - ((unsigned long)&__init_end - - (unsigned long)&__init_begin) >> 10); + free_initmem_default(-1); } diff --git a/arch/openrisc/mm/tlb.c b/arch/openrisc/mm/tlb.c index 56b0b89624a..683bd4d31c7 100644 --- a/arch/openrisc/mm/tlb.c +++ b/arch/openrisc/mm/tlb.c @@ -26,7 +26,6 @@ #include <linux/mm.h> #include <linux/init.h> -#include <asm/system.h> #include <asm/segment.h> #include <asm/tlbflush.h> #include <asm/pgtable.h> |