diff options
Diffstat (limited to 'arch/hexagon')
49 files changed, 797 insertions, 569 deletions
diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 0744f7d7b1f..0fd6138f620 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -4,7 +4,6 @@ comment "Linux Kernel Configuration for Hexagon" config HEXAGON def_bool y select HAVE_OPROFILE - select USE_GENERIC_SMP_HELPERS if SMP # Other pending projects/to-do items. # select HAVE_REGS_AND_STACK_ACCESS_API # select HAVE_HW_BREAKPOINT if PERF_EVENTS @@ -12,18 +11,15 @@ config HEXAGON # select ARCH_WANT_OPTIONAL_GPIOLIB # select ARCH_REQUIRE_GPIOLIB # select HAVE_CLK - # select IRQ_PER_CPU # select GENERIC_PENDING_IRQ if SMP - select HAVE_IRQ_WORK select GENERIC_ATOMIC64 select HAVE_PERF_EVENTS - select HAVE_GENERIC_HARDIRQS # GENERIC_ALLOCATOR is used by dma_alloc_coherent() select GENERIC_ALLOCATOR select GENERIC_IRQ_SHOW select HAVE_ARCH_KGDB select HAVE_ARCH_TRACEHOOK - select NO_IOPORT + select NO_IOPORT_MAP select GENERIC_IOMAP select GENERIC_SMP_IDLE_THREAD select STACKTRACE_SUPPORT @@ -31,21 +27,16 @@ config HEXAGON select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST select MODULES_USE_ELF_RELA + select GENERIC_CPU_DEVICES + select HAVE_DMA_ATTRS ---help--- Qualcomm Hexagon is a processor architecture designed for high performance and low power across a wide variety of applications. -config HEXAGON_ARCH_V1 - bool - -config HEXAGON_ARCH_V2 - bool - -config HEXAGON_ARCH_V3 - bool - -config HEXAGON_ARCH_V4 - bool +config HEXAGON_PHYS_OFFSET + def_bool y + ---help--- + Platforms that don't load the kernel at zero set this. config FRAME_POINTER def_bool y @@ -83,9 +74,6 @@ config RWSEM_GENERIC_SPINLOCK config RWSEM_XCHGADD_ALGORITHM def_bool y -config GENERIC_FIND_NEXT_BIT - def_bool y - config GENERIC_HWEIGHT def_bool y @@ -105,14 +93,14 @@ choice config HEXAGON_COMET bool "Comet Board" - select HEXAGON_ARCH_V2 ---help--- Support for the Comet platform. endchoice -config HEXAGON_VM - def_bool y +config HEXAGON_ARCH_VERSION + int "Architecture version" + default 2 config CMDLINE string "Default kernel command string" @@ -124,12 +112,6 @@ config CMDLINE minimum, you should specify the memory size and the root device (e.g., mem=64M root=/dev/nfs). -config HEXAGON_ANGEL_TRAPS - bool "Use Angel Traps" - default n - ---help--- - Enable angel debug traps (for printk's). - config SMP bool "Multi-Processing support" ---help--- @@ -172,12 +154,10 @@ source "mm/Kconfig" source "kernel/Kconfig.hz" -config GENERIC_GPIO - def_bool n - endmenu source "init/Kconfig" +source "kernel/Kconfig.freezer" source "drivers/Kconfig" source "fs/Kconfig" diff --git a/arch/hexagon/Makefile b/arch/hexagon/Makefile index d00d900b256..207711a0fd0 100644 --- a/arch/hexagon/Makefile +++ b/arch/hexagon/Makefile @@ -15,20 +15,9 @@ KBUILD_CFLAGS += -fno-short-enums # LDFLAGS_MODULE += -shared CFLAGS_MODULE += -mlong-calls -cflags-$(CONFIG_HEXAGON_ARCH_V1) += $(call cc-option,-mv1) -cflags-$(CONFIG_HEXAGON_ARCH_V2) += $(call cc-option,-mv2) -cflags-$(CONFIG_HEXAGON_ARCH_V3) += $(call cc-option,-mv3) -cflags-$(CONFIG_HEXAGON_ARCH_V4) += $(call cc-option,-mv4) - -aflags-$(CONFIG_HEXAGON_ARCH_V1) += $(call cc-option,-mv1) -aflags-$(CONFIG_HEXAGON_ARCH_V2) += $(call cc-option,-mv2) -aflags-$(CONFIG_HEXAGON_ARCH_V3) += $(call cc-option,-mv3) -aflags-$(CONFIG_HEXAGON_ARCH_V4) += $(call cc-option,-mv4) - -ldflags-$(CONFIG_HEXAGON_ARCH_V1) += $(call cc-option,-mv1) -ldflags-$(CONFIG_HEXAGON_ARCH_V2) += $(call cc-option,-mv2) -ldflags-$(CONFIG_HEXAGON_ARCH_V3) += $(call cc-option,-mv3) -ldflags-$(CONFIG_HEXAGON_ARCH_V4) += $(call cc-option,-mv4) +cflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION}) +aflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION}) +ldflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION}) KBUILD_CFLAGS += $(cflags-y) KBUILD_AFLAGS += $(aflags-y) diff --git a/arch/hexagon/include/asm/Kbuild b/arch/hexagon/include/asm/Kbuild index bdb54ceb53b..0e69796b58c 100644 --- a/arch/hexagon/include/asm/Kbuild +++ b/arch/hexagon/include/asm/Kbuild @@ -2,6 +2,7 @@ header-y += ucontext.h generic-y += auxvec.h +generic-y += barrier.h generic-y += bug.h generic-y += bugs.h generic-y += clkdev.h @@ -15,6 +16,7 @@ generic-y += fb.h generic-y += fcntl.h generic-y += ftrace.h generic-y += hardirq.h +generic-y += hash.h generic-y += hw_irq.h generic-y += ioctl.h generic-y += ioctls.h @@ -23,28 +25,31 @@ generic-y += ipcbuf.h generic-y += irq_regs.h generic-y += kdebug.h generic-y += kmap_types.h -generic-y += local64.h -generic-y += local.h generic-y += local.h +generic-y += local64.h +generic-y += mcs_spinlock.h generic-y += mman.h generic-y += msgbuf.h 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 += rwsem.h generic-y += scatterlist.h generic-y += sections.h generic-y += segment.h generic-y += sembuf.h +generic-y += serial.h generic-y += shmbuf.h generic-y += shmparam.h generic-y += siginfo.h +generic-y += sizes.h generic-y += socket.h generic-y += sockios.h -generic-y += statfs.h generic-y += stat.h +generic-y += statfs.h generic-y += termbits.h generic-y += termios.h generic-y += topology.h @@ -52,4 +57,5 @@ generic-y += trace_clock.h generic-y += types.h generic-y += ucontext.h generic-y += unaligned.h +generic-y += vga.h generic-y += xor.h diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h index 468fbb0781c..de916b11bff 100644 --- a/arch/hexagon/include/asm/atomic.h +++ b/arch/hexagon/include/asm/atomic.h @@ -1,7 +1,7 @@ /* * Atomic operations for the Hexagon architecture * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * * This program is free software; you can redistribute it and/or modify @@ -24,9 +24,23 @@ #include <linux/types.h> #include <asm/cmpxchg.h> +#include <asm/barrier.h> #define ATOMIC_INIT(i) { (i) } -#define atomic_set(v, i) ((v)->counter = (i)) + +/* Normal writes in our arch don't clear lock reservations */ + +static inline void atomic_set(atomic_t *v, int new) +{ + asm volatile( + "1: r6 = memw_locked(%0);\n" + " memw_locked(%0,p0) = %1;\n" + " if (!P0) jump 1b;\n" + : + : "r" (&v->counter), "r" (new) + : "memory", "p0", "r6" + ); +} /** * atomic_read - reads a word, atomically @@ -117,35 +131,37 @@ static inline int atomic_sub_return(int i, atomic_t *v) #define atomic_sub(i, v) atomic_sub_return(i, (v)) /** - * atomic_add_unless - add unless the number is a given value + * __atomic_add_unless - add unless the number is a given value * @v: pointer to value * @a: amount to add * @u: unless value is equal to u * - * Returns 1 if the add happened, 0 if it didn't. + * Returns old value. + * */ + static inline int __atomic_add_unless(atomic_t *v, int a, int u) { - int output, __oldval; + int __oldval; + register int tmp; + asm volatile( "1: %0 = memw_locked(%2);" " {" " p3 = cmp.eq(%0, %4);" " if (p3.new) jump:nt 2f;" - " %0 = add(%0, %3);" - " %1 = #0;" + " %1 = add(%0, %3);" " }" - " memw_locked(%2, p3) = %0;" + " memw_locked(%2, p3) = %1;" " {" " if !p3 jump 1b;" - " %1 = #1;" " }" "2:" - : "=&r" (__oldval), "=&r" (output) + : "=&r" (__oldval), "=&r" (tmp) : "r" (v), "r" (a), "r" (u) : "memory", "p3" ); - return output; + return __oldval; } #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) @@ -158,7 +174,6 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) #define atomic_sub_and_test(i, v) (atomic_sub_return(i, (v)) == 0) #define atomic_add_negative(i, v) (atomic_add_return(i, (v)) < 0) - #define atomic_inc_return(v) (atomic_add_return(1, v)) #define atomic_dec_return(v) (atomic_sub_return(1, v)) diff --git a/arch/hexagon/include/asm/barrier.h b/arch/hexagon/include/asm/barrier.h deleted file mode 100644 index 1041a8e70ce..00000000000 --- a/arch/hexagon/include/asm/barrier.h +++ /dev/null @@ -1,41 +0,0 @@ -/* - * Memory barrier definitions for the Hexagon architecture - * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#ifndef _ASM_BARRIER_H -#define _ASM_BARRIER_H - -#define rmb() barrier() -#define read_barrier_depends() barrier() -#define wmb() barrier() -#define mb() barrier() -#define smp_rmb() barrier() -#define smp_read_barrier_depends() barrier() -#define smp_wmb() barrier() -#define smp_mb() barrier() -#define smp_mb__before_atomic_dec() barrier() -#define smp_mb__after_atomic_dec() barrier() -#define smp_mb__before_atomic_inc() barrier() -#define smp_mb__after_atomic_inc() barrier() - -/* Set a value and use a memory barrier. Used by the scheduler somewhere. */ -#define set_mb(var, value) \ - do { var = value; mb(); } while (0) - -#endif /* _ASM_BARRIER_H */ diff --git a/arch/hexagon/include/asm/bitops.h b/arch/hexagon/include/asm/bitops.h index 9b1e4afbab3..5e4a59b3ec1 100644 --- a/arch/hexagon/include/asm/bitops.h +++ b/arch/hexagon/include/asm/bitops.h @@ -25,12 +25,10 @@ #include <linux/compiler.h> #include <asm/byteorder.h> #include <asm/atomic.h> +#include <asm/barrier.h> #ifdef __KERNEL__ -#define smp_mb__before_clear_bit() barrier() -#define smp_mb__after_clear_bit() barrier() - /* * The offset calculations for these are based on BITS_PER_LONG == 32 * (i.e. I get to shift by #5-2 (32 bits per long, 4 bytes per access), diff --git a/arch/hexagon/include/asm/delay.h b/arch/hexagon/include/asm/delay.h index 53079719d66..8933b9b1a3b 100644 --- a/arch/hexagon/include/asm/delay.h +++ b/arch/hexagon/include/asm/delay.h @@ -21,6 +21,7 @@ #include <asm/param.h> +extern void __delay(unsigned long cycles); extern void __udelay(unsigned long usecs); #define udelay(usecs) __udelay((usecs)) diff --git a/arch/hexagon/include/asm/dma-mapping.h b/arch/hexagon/include/asm/dma-mapping.h index 85e9935660c..16965427f6b 100644 --- a/arch/hexagon/include/asm/dma-mapping.h +++ b/arch/hexagon/include/asm/dma-mapping.h @@ -25,7 +25,6 @@ #include <linux/cache.h> #include <linux/mm.h> #include <linux/scatterlist.h> -#include <linux/dma-mapping.h> #include <linux/dma-debug.h> #include <linux/dma-attrs.h> #include <asm/io.h> diff --git a/arch/hexagon/include/asm/elf.h b/arch/hexagon/include/asm/elf.h index 1ba4b3bff5e..80311e7b8ca 100644 --- a/arch/hexagon/include/asm/elf.h +++ b/arch/hexagon/include/asm/elf.h @@ -1,7 +1,7 @@ /* * ELF definitions for the Hexagon architecture * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -104,6 +104,16 @@ typedef unsigned long elf_fpregset_t; * Bypass the whole "regsets" thing for now and use the define. */ +#if CONFIG_HEXAGON_ARCH_VERSION >= 4 +#define CS_COPYREGS(DEST,REGS) \ +do {\ + DEST.cs0 = REGS->cs0;\ + DEST.cs1 = REGS->cs1;\ +} while (0) +#else +#define CS_COPYREGS(DEST,REGS) +#endif + #define ELF_CORE_COPY_REGS(DEST, REGS) \ do { \ DEST.r0 = REGS->r00; \ @@ -148,13 +158,12 @@ do { \ DEST.p3_0 = REGS->preds; \ DEST.gp = REGS->gp; \ DEST.ugp = REGS->ugp; \ - DEST.pc = pt_elr(REGS); \ + CS_COPYREGS(DEST,REGS); \ + DEST.pc = pt_elr(REGS); \ DEST.cause = pt_cause(REGS); \ DEST.badva = pt_badva(REGS); \ } while (0); - - /* * This is used to ensure we don't load something for the wrong architecture. * Checks the machine and ABI type. @@ -168,15 +177,15 @@ do { \ #define ELF_DATA ELFDATA2LSB #define ELF_ARCH EM_HEXAGON -#ifdef CONFIG_HEXAGON_ARCH_V2 +#if CONFIG_HEXAGON_ARCH_VERSION == 2 #define ELF_CORE_EFLAGS 0x1 #endif -#ifdef CONFIG_HEXAGON_ARCH_V3 +#if CONFIG_HEXAGON_ARCH_VERSION == 3 #define ELF_CORE_EFLAGS 0x2 #endif -#ifdef CONFIG_HEXAGON_ARCH_V4 +#if CONFIG_HEXAGON_ARCH_VERSION == 4 #define ELF_CORE_EFLAGS 0x3 #endif @@ -193,7 +202,7 @@ do { \ #define CORE_DUMP_USE_REGSET /* Hrm is this going to cause problems for changing PAGE_SIZE? */ -#define ELF_EXEC_PAGESIZE 4096 +#define ELF_EXEC_PAGESIZE PAGE_SIZE /* * This is the location that an ET_DYN program is loaded if exec'ed. Typical @@ -216,11 +225,6 @@ do { \ */ #define ELF_PLATFORM (NULL) -#ifdef __KERNEL__ -#define SET_PERSONALITY(ex) \ - set_personality(PER_LINUX | (current->personality & (~PER_MASK))) -#endif - #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 struct linux_binprm; extern int arch_setup_additional_pages(struct linux_binprm *bprm, diff --git a/arch/hexagon/include/asm/fixmap.h b/arch/hexagon/include/asm/fixmap.h index b75b6bf4269..1387f84b42b 100644 --- a/arch/hexagon/include/asm/fixmap.h +++ b/arch/hexagon/include/asm/fixmap.h @@ -26,45 +26,7 @@ */ #include <asm/mem-layout.h> -/* - * Full fixmap support involves set_fixmap() functions, but - * these may not be needed if all we're after is an area for - * highmem kernel mappings. - */ -#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) -#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) - -extern void __this_fixmap_does_not_exist(void); - -/** - * fix_to_virt -- "index to address" translation. - * - * If anyone tries to use the idx directly without translation, - * we catch the bug with a NULL-deference kernel oops. Illegal - * ranges of incoming indices are caught too. - */ -static inline unsigned long fix_to_virt(const unsigned int idx) -{ - /* - * This branch gets completely eliminated after inlining, - * except when someone tries to use fixaddr indices in an - * illegal way. (such as mixing up address types or using - * out-of-range indices). - * - * If it doesn't get removed, the linker will complain - * loudly with a reasonably clear error message.. - */ - if (idx >= __end_of_fixed_addresses) - __this_fixmap_does_not_exist(); - - return __fix_to_virt(idx); -} - -static inline unsigned long virt_to_fix(const unsigned long vaddr) -{ - BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); - return __virt_to_fix(vaddr); -} +#include <asm-generic/fixmap.h> #define kmap_get_fixmap_pte(vaddr) \ pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), \ diff --git a/arch/hexagon/include/asm/hexagon_vm.h b/arch/hexagon/include/asm/hexagon_vm.h index c144bee6cab..1f6918b428d 100644 --- a/arch/hexagon/include/asm/hexagon_vm.h +++ b/arch/hexagon/include/asm/hexagon_vm.h @@ -1,7 +1,7 @@ /* * Declarations for to Hexagon Virtal Machine. * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -31,35 +31,51 @@ * for tracing/debugging. */ -/* - * Lets make this stuff visible only if configured, - * so we can unconditionally include the file. - */ +#define HVM_TRAP1_VMVERSION 0 +#define HVM_TRAP1_VMRTE 1 +#define HVM_TRAP1_VMSETVEC 2 +#define HVM_TRAP1_VMSETIE 3 +#define HVM_TRAP1_VMGETIE 4 +#define HVM_TRAP1_VMINTOP 5 +#define HVM_TRAP1_VMCLRMAP 10 +#define HVM_TRAP1_VMNEWMAP 11 +#define HVM_TRAP1_FORMERLY_VMWIRE 12 +#define HVM_TRAP1_VMCACHE 13 +#define HVM_TRAP1_VMGETTIME 14 +#define HVM_TRAP1_VMSETTIME 15 +#define HVM_TRAP1_VMWAIT 16 +#define HVM_TRAP1_VMYIELD 17 +#define HVM_TRAP1_VMSTART 18 +#define HVM_TRAP1_VMSTOP 19 +#define HVM_TRAP1_VMVPID 20 +#define HVM_TRAP1_VMSETREGS 21 +#define HVM_TRAP1_VMGETREGS 22 +#define HVM_TRAP1_VMTIMEROP 24 #ifndef __ASSEMBLY__ enum VM_CACHE_OPS { - ickill, - dckill, - l2kill, - dccleaninva, - icinva, - idsync, - fetch_cfg + hvmc_ickill, + hvmc_dckill, + hvmc_l2kill, + hvmc_dccleaninva, + hvmc_icinva, + hvmc_idsync, + hvmc_fetch_cfg }; enum VM_INT_OPS { - nop, - globen, - globdis, - locen, - locdis, - affinity, - get, - peek, - status, - post, - clear + hvmi_nop, + hvmi_globen, + hvmi_globdis, + hvmi_locen, + hvmi_locdis, + hvmi_affinity, + hvmi_get, + hvmi_peek, + hvmi_status, + hvmi_post, + hvmi_clear }; extern void _K_VM_event_vector(void); @@ -82,124 +98,112 @@ long __vmvpid(void); static inline long __vmcache_ickill(void) { - return __vmcache(ickill, 0, 0); + return __vmcache(hvmc_ickill, 0, 0); } static inline long __vmcache_dckill(void) { - return __vmcache(dckill, 0, 0); + return __vmcache(hvmc_dckill, 0, 0); } static inline long __vmcache_l2kill(void) { - return __vmcache(l2kill, 0, 0); + return __vmcache(hvmc_l2kill, 0, 0); } static inline long __vmcache_dccleaninva(unsigned long addr, unsigned long len) { - return __vmcache(dccleaninva, addr, len); + return __vmcache(hvmc_dccleaninva, addr, len); } static inline long __vmcache_icinva(unsigned long addr, unsigned long len) { - return __vmcache(icinva, addr, len); + return __vmcache(hvmc_icinva, addr, len); } static inline long __vmcache_idsync(unsigned long addr, unsigned long len) { - return __vmcache(idsync, addr, len); + return __vmcache(hvmc_idsync, addr, len); } static inline long __vmcache_fetch_cfg(unsigned long val) { - return __vmcache(fetch_cfg, val, 0); + return __vmcache(hvmc_fetch_cfg, val, 0); } /* interrupt operations */ static inline long __vmintop_nop(void) { - return __vmintop(nop, 0, 0, 0, 0); + return __vmintop(hvmi_nop, 0, 0, 0, 0); } static inline long __vmintop_globen(long i) { - return __vmintop(globen, i, 0, 0, 0); + return __vmintop(hvmi_globen, i, 0, 0, 0); } static inline long __vmintop_globdis(long i) { - return __vmintop(globdis, i, 0, 0, 0); + return __vmintop(hvmi_globdis, i, 0, 0, 0); } static inline long __vmintop_locen(long i) { - return __vmintop(locen, i, 0, 0, 0); + return __vmintop(hvmi_locen, i, 0, 0, 0); } static inline long __vmintop_locdis(long i) { - return __vmintop(locdis, i, 0, 0, 0); + return __vmintop(hvmi_locdis, i, 0, 0, 0); } static inline long __vmintop_affinity(long i, long cpu) { - return __vmintop(locdis, i, cpu, 0, 0); + return __vmintop(hvmi_affinity, i, cpu, 0, 0); } static inline long __vmintop_get(void) { - return __vmintop(get, 0, 0, 0, 0); + return __vmintop(hvmi_get, 0, 0, 0, 0); } static inline long __vmintop_peek(void) { - return __vmintop(peek, 0, 0, 0, 0); + return __vmintop(hvmi_peek, 0, 0, 0, 0); } static inline long __vmintop_status(long i) { - return __vmintop(status, i, 0, 0, 0); + return __vmintop(hvmi_status, i, 0, 0, 0); } static inline long __vmintop_post(long i) { - return __vmintop(post, i, 0, 0, 0); + return __vmintop(hvmi_post, i, 0, 0, 0); } static inline long __vmintop_clear(long i) { - return __vmintop(clear, i, 0, 0, 0); + return __vmintop(hvmi_clear, i, 0, 0, 0); } #else /* Only assembly code should reference these */ -#define HVM_TRAP1_VMRTE 1 -#define HVM_TRAP1_VMSETVEC 2 -#define HVM_TRAP1_VMSETIE 3 -#define HVM_TRAP1_VMGETIE 4 -#define HVM_TRAP1_VMINTOP 5 -#define HVM_TRAP1_VMCLRMAP 10 -#define HVM_TRAP1_VMNEWMAP 11 -#define HVM_TRAP1_FORMERLY_VMWIRE 12 -#define HVM_TRAP1_VMCACHE 13 -#define HVM_TRAP1_VMGETTIME 14 -#define HVM_TRAP1_VMSETTIME 15 -#define HVM_TRAP1_VMWAIT 16 -#define HVM_TRAP1_VMYIELD 17 -#define HVM_TRAP1_VMSTART 18 -#define HVM_TRAP1_VMSTOP 19 -#define HVM_TRAP1_VMVPID 20 -#define HVM_TRAP1_VMSETREGS 21 -#define HVM_TRAP1_VMGETREGS 22 - #endif /* __ASSEMBLY__ */ /* * Constants for virtual instruction parameters and return values */ +/* vmnewmap arguments */ + +#define VM_TRANS_TYPE_LINEAR 0 +#define VM_TRANS_TYPE_TABLE 1 +#define VM_TLB_INVALIDATE_FALSE 0 +#define VM_TLB_INVALIDATE_TRUE 1 + /* vmsetie arguments */ #define VM_INT_DISABLE 0 @@ -224,6 +228,8 @@ static inline long __vmintop_clear(long i) #define HVM_VMEST_UM_MSK 1 #define HVM_VMEST_IE_SFT 30 #define HVM_VMEST_IE_MSK 1 +#define HVM_VMEST_SS_SFT 29 +#define HVM_VMEST_SS_MSK 1 #define HVM_VMEST_EVENTNUM_SFT 16 #define HVM_VMEST_EVENTNUM_MSK 0xff #define HVM_VMEST_CAUSE_SFT 0 @@ -260,6 +266,8 @@ static inline long __vmintop_clear(long i) #define HVM_GE_C_INVI 0x15 #define HVM_GE_C_PRIVI 0x1B #define HVM_GE_C_XMAL 0x1C +#define HVM_GE_C_WREG 0x1D +#define HVM_GE_C_PCAL 0x1E #define HVM_GE_C_RMAL 0x20 #define HVM_GE_C_WMAL 0x21 #define HVM_GE_C_RPROT 0x22 diff --git a/arch/hexagon/include/asm/io.h b/arch/hexagon/include/asm/io.h index e527cfeff5b..70298996e9b 100644 --- a/arch/hexagon/include/asm/io.h +++ b/arch/hexagon/include/asm/io.h @@ -1,7 +1,7 @@ /* * IO definitions for the Hexagon architecture * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -40,6 +40,8 @@ #define IO_SPACE_LIMIT 0xffff #define _IO_BASE ((void __iomem *)0xfe000000) +#define IOMEM(x) ((void __force __iomem *)(x)) + extern int remap_area_pages(unsigned long start, unsigned long phys_addr, unsigned long end, unsigned long flags); @@ -176,6 +178,20 @@ static inline void writel(u32 data, volatile void __iomem *addr) #define __raw_readl readl /* + * http://comments.gmane.org/gmane.linux.ports.arm.kernel/117626 + */ + +#define readb_relaxed __raw_readb +#define readw_relaxed __raw_readw +#define readl_relaxed __raw_readl + +#define writeb_relaxed __raw_writeb +#define writew_relaxed __raw_writew +#define writel_relaxed __raw_writel + +#define mmiowb() + +/* * Need an mtype somewhere in here, for cache type deals? * This is probably too long for an inline. */ diff --git a/arch/hexagon/include/asm/kgdb.h b/arch/hexagon/include/asm/kgdb.h index 32a6fb66944..ccd3ac336b2 100644 --- a/arch/hexagon/include/asm/kgdb.h +++ b/arch/hexagon/include/asm/kgdb.h @@ -34,10 +34,11 @@ static inline void arch_kgdb_breakpoint(void) * 32 gpr + sa0/1 + lc0/1 + m0/1 + gp + ugp + pred + pc = 42 total. * vm regs = psp+elr+est+badva = 4 * syscall+restart = 2 more - * so 48 = 42 +4 + 2 + * also add cs0/1 = 2 + * so 48 = 42 + 4 + 2 + 2 */ #define DBG_USER_REGS 42 -#define DBG_MAX_REG_NUM (DBG_USER_REGS + 6) +#define DBG_MAX_REG_NUM (DBG_USER_REGS + 8) #define NUMREGBYTES (DBG_MAX_REG_NUM*4) #endif /* __HEXAGON_KGDB_H__ */ diff --git a/arch/hexagon/include/asm/mem-layout.h b/arch/hexagon/include/asm/mem-layout.h index af16e977c55..60556f8c45d 100644 --- a/arch/hexagon/include/asm/mem-layout.h +++ b/arch/hexagon/include/asm/mem-layout.h @@ -1,7 +1,7 @@ /* * Memory layout definitions for the Hexagon architecture * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -32,16 +32,25 @@ #define PAGE_OFFSET _AC(0xc0000000, UL) /* - * LOAD_ADDRESS is the physical/linear address of where in memory - * the kernel gets loaded. The 12 least significant bits must be zero (0) - * due to limitations on setting the EVB - * + * Compiling for a platform that needs a crazy physical offset + * (like if the memory starts at 1GB and up) means we need + * an actual PHYS_OFFSET. Should be set up in head.S. */ -#ifndef LOAD_ADDRESS -#define LOAD_ADDRESS 0x00000000 +#ifdef CONFIG_HEXAGON_PHYS_OFFSET +#ifndef __ASSEMBLY__ +extern unsigned long __phys_offset; +#endif +#define PHYS_OFFSET __phys_offset +#endif + +#ifndef PHYS_OFFSET +#define PHYS_OFFSET 0 #endif +#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT) +#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET + #define TASK_SIZE (PAGE_OFFSET) /* not sure how these are used yet */ @@ -55,7 +64,7 @@ enum fixed_addresses { __end_of_fixed_addresses }; -#define MIN_KERNEL_SEG 0x300 /* From 0xc0000000 */ +#define MIN_KERNEL_SEG (PAGE_OFFSET >> PGDIR_SHIFT) /* L1 shift is 22 bits */ extern int max_kernel_seg; /* @@ -63,8 +72,7 @@ extern int max_kernel_seg; * supposed to be based on the amount of physical memory available */ -#define VMALLOC_START (PAGE_OFFSET + VMALLOC_OFFSET + \ - (unsigned long)high_memory) +#define VMALLOC_START ((unsigned long) __va(high_memory + VMALLOC_OFFSET)) /* Gap between physical ram and vmalloc space for guard purposes. */ #define VMALLOC_OFFSET PAGE_SIZE diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h index 692adc21342..93f5669b4aa 100644 --- a/arch/hexagon/include/asm/page.h +++ b/arch/hexagon/include/asm/page.h @@ -1,7 +1,7 @@ /* * Page management definitions for the Hexagon architecture * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -96,8 +96,8 @@ typedef struct page *pgtable_t; * MIPS says they're only used during mem_init. * also, check if we need a PHYS_OFFSET. */ -#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET) -#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET)) +#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET) +#define __va(x) ((void *)((unsigned long)(x) - PHYS_OFFSET + PAGE_OFFSET)) /* The "page frame" descriptor is defined in linux/mm.h */ struct page; @@ -140,6 +140,11 @@ static inline void clear_page(void *page) */ #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) +#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) +#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) + +#define page_to_virt(page) __va(page_to_phys(page)) + /* * For port to Hexagon Virtual Machine, MAYBE we check for attempts * to reference reserved HVM space, but in any case, the VM will be @@ -147,6 +152,7 @@ static inline void clear_page(void *page) */ #define kern_addr_valid(addr) (1) +#include <asm/mem-layout.h> #include <asm-generic/memory_model.h> /* XXX Todo: implement assembly-optimized version of getorder. */ #include <asm-generic/getorder.h> diff --git a/arch/hexagon/include/asm/pgalloc.h b/arch/hexagon/include/asm/pgalloc.h index 679bf6d6648..77da3b0ae3c 100644 --- a/arch/hexagon/include/asm/pgalloc.h +++ b/arch/hexagon/include/asm/pgalloc.h @@ -45,7 +45,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm) * map with a copy of the kernel's persistent map. */ - memcpy(pgd, swapper_pg_dir, PTRS_PER_PGD*sizeof(pgd_t *)); + memcpy(pgd, swapper_pg_dir, PTRS_PER_PGD*sizeof(pgd_t)); mm->context.generation = kmap_generation; /* Physical version is what is passed to virtual machine on switch */ @@ -65,10 +65,12 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, struct page *pte; pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO); - - if (pte) - pgtable_page_ctor(pte); - + if (!pte) + return NULL; + if (!pgtable_page_ctor(pte)) { + __free_page(pte); + return NULL; + } return pte; } diff --git a/arch/hexagon/include/asm/pgtable.h b/arch/hexagon/include/asm/pgtable.h index 20d55f69fe5..d8bd54fa431 100644 --- a/arch/hexagon/include/asm/pgtable.h +++ b/arch/hexagon/include/asm/pgtable.h @@ -452,10 +452,6 @@ static inline int pte_exec(pte_t pte) #define __pte_offset(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) -/* Nothing special about IO remapping at this point */ -#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ - remap_pfn_range(vma, vaddr, pfn, size, prot) - /* I think this is in case we have page table caches; needed by init/main.c */ #define pgtable_cache_init() do { } while (0) diff --git a/arch/hexagon/include/asm/processor.h b/arch/hexagon/include/asm/processor.h index 6dd5d370686..45a825402f6 100644 --- a/arch/hexagon/include/asm/processor.h +++ b/arch/hexagon/include/asm/processor.h @@ -1,7 +1,7 @@ /* * Process/processor support for the Hexagon architecture * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -100,12 +100,49 @@ extern unsigned long get_wchan(struct task_struct *p); */ struct hexagon_switch_stack { - unsigned long long r1716; - unsigned long long r1918; - unsigned long long r2120; - unsigned long long r2322; - unsigned long long r2524; - unsigned long long r2726; + union { + struct { + unsigned long r16; + unsigned long r17; + }; + unsigned long long r1716; + }; + union { + struct { + unsigned long r18; + unsigned long r19; + }; + unsigned long long r1918; + }; + union { + struct { + unsigned long r20; + unsigned long r21; + }; + unsigned long long r2120; + }; + union { + struct { + unsigned long r22; + unsigned long r23; + }; + unsigned long long r2322; + }; + union { + struct { + unsigned long r24; + unsigned long r25; + }; + unsigned long long r2524; + }; + union { + struct { + unsigned long r26; + unsigned long r27; + }; + unsigned long long r2726; + }; + unsigned long fp; unsigned long lr; }; diff --git a/arch/hexagon/include/asm/smp.h b/arch/hexagon/include/asm/smp.h index 2b9b974e095..ca171c13891 100644 --- a/arch/hexagon/include/asm/smp.h +++ b/arch/hexagon/include/asm/smp.h @@ -29,7 +29,6 @@ enum ipi_message_type { IPI_NOP = 0, IPI_RESCHEDULE = 1, IPI_CALL_FUNC, - IPI_CALL_FUNC_SINGLE, IPI_CPU_STOP, IPI_TIMER, }; diff --git a/arch/hexagon/include/asm/thread_info.h b/arch/hexagon/include/asm/thread_info.h index f7c32406a71..a59dad3b369 100644 --- a/arch/hexagon/include/asm/thread_info.h +++ b/arch/hexagon/include/asm/thread_info.h @@ -73,10 +73,6 @@ struct thread_info { #endif /* __ASSEMBLY__ */ -/* looks like "linux/hardirq.h" uses this. */ - -#define PREEMPT_ACTIVE 0x10000000 - #ifndef __ASSEMBLY__ #define INIT_THREAD_INFO(tsk) \ diff --git a/arch/hexagon/include/asm/vm_mmu.h b/arch/hexagon/include/asm/vm_mmu.h index 9a94de7969b..096537d8f4c 100644 --- a/arch/hexagon/include/asm/vm_mmu.h +++ b/arch/hexagon/include/asm/vm_mmu.h @@ -1,7 +1,7 @@ /* * Hexagon VM page table entry definitions * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2011,2013 The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -68,14 +68,13 @@ #define __HEXAGON_C_WB 0x0 /* Write-back, no L2 */ #define __HEXAGON_C_WT 0x1 /* Write-through, no L2 */ +#define __HEXAGON_C_UNC 0x6 /* Uncached memory */ +#if CONFIG_HEXAGON_ARCH_VERSION >= 2 #define __HEXAGON_C_DEV 0x4 /* Device register space */ -#define __HEXAGON_C_WT_L2 0x5 /* Write-through, with L2 */ -/* this really should be #if CONFIG_HEXAGON_ARCH = 2 but that's not defined */ -#if defined(CONFIG_HEXAGON_COMET) || defined(CONFIG_QDSP6_ST1) -#define __HEXAGON_C_UNC __HEXAGON_C_DEV #else -#define __HEXAGON_C_UNC 0x6 /* Uncached memory */ +#define __HEXAGON_C_DEV __HEXAGON_C_UNC #endif +#define __HEXAGON_C_WT_L2 0x5 /* Write-through, with L2 */ #define __HEXAGON_C_WB_L2 0x7 /* Write-back, with L2 */ /* diff --git a/arch/hexagon/include/uapi/asm/ptrace.h b/arch/hexagon/include/uapi/asm/ptrace.h index 1ffce0c6ee0..065e5b32313 100644 --- a/arch/hexagon/include/uapi/asm/ptrace.h +++ b/arch/hexagon/include/uapi/asm/ptrace.h @@ -36,4 +36,9 @@ extern const char *regs_query_register_name(unsigned int offset); ((struct pt_regs *) \ ((unsigned long)current_thread_info() + THREAD_SIZE) - 1) +#if CONFIG_HEXAGON_ARCH_VERSION >= 4 +#define arch_has_single_step() (1) +#endif + + #endif diff --git a/arch/hexagon/include/uapi/asm/registers.h b/arch/hexagon/include/uapi/asm/registers.h index c20406f63b5..e7be31840a9 100644 --- a/arch/hexagon/include/uapi/asm/registers.h +++ b/arch/hexagon/include/uapi/asm/registers.h @@ -6,8 +6,6 @@ #ifndef _ASM_REGISTERS_H #define _ASM_REGISTERS_H -#define SP r29 - #ifndef __ASSEMBLY__ /* See kernel/entry.S for further documentation. */ @@ -57,10 +55,17 @@ struct pt_regs { }; union { struct { - unsigned long gp; unsigned long ugp; + unsigned long gp; + }; + long long int gpugp; + }; + union { + struct { + unsigned long cs0; + unsigned long cs1; }; - long long int ugpgp; + long long int cs1cs0; }; /* * Be extremely careful with rearranging these, if at all. Some code @@ -204,9 +209,11 @@ struct pt_regs { #define pt_psp(regs) ((regs)->hvmer.vmpsp) #define pt_badva(regs) ((regs)->hvmer.vmbadva) +#define pt_set_singlestep(regs) ((regs)->hvmer.vmest |= (1<<HVM_VMEST_SS_SFT)) +#define pt_clr_singlestep(regs) ((regs)->hvmer.vmest &= ~(1<<HVM_VMEST_SS_SFT)) + #define pt_set_rte_sp(regs, sp) do {\ - pt_psp(regs) = (sp);\ - (regs)->SP = (unsigned long) &((regs)->hvmer);\ + pt_psp(regs) = (regs)->r29 = (sp);\ } while (0) #define pt_set_kmode(regs) \ diff --git a/arch/hexagon/include/uapi/asm/setup.h b/arch/hexagon/include/uapi/asm/setup.h index e48285e4af9..7e3952d6221 100644 --- a/arch/hexagon/include/uapi/asm/setup.h +++ b/arch/hexagon/include/uapi/asm/setup.h @@ -19,7 +19,12 @@ #ifndef _ASM_SETUP_H #define _ASM_SETUP_H +#ifdef __KERNEL__ #include <linux/init.h> +#else +#define __init +#endif + #include <asm-generic/setup.h> extern char external_cmdline_buffer; diff --git a/arch/hexagon/include/uapi/asm/signal.h b/arch/hexagon/include/uapi/asm/signal.h index 939556817d3..98106e55ad4 100644 --- a/arch/hexagon/include/uapi/asm/signal.h +++ b/arch/hexagon/include/uapi/asm/signal.h @@ -19,8 +19,12 @@ #ifndef _ASM_SIGNAL_H #define _ASM_SIGNAL_H +#include <uapi/asm/registers.h> + extern unsigned long __rt_sigtramp_template[2]; +void do_signal(struct pt_regs *regs); + #include <asm-generic/signal.h> #endif diff --git a/arch/hexagon/include/uapi/asm/unistd.h b/arch/hexagon/include/uapi/asm/unistd.h index 4a87cc47075..ffee405d680 100644 --- a/arch/hexagon/include/uapi/asm/unistd.h +++ b/arch/hexagon/include/uapi/asm/unistd.h @@ -27,6 +27,9 @@ */ #define sys_mmap2 sys_mmap_pgoff +#define __ARCH_WANT_SYS_EXECVE #define __ARCH_WANT_SYS_CLONE +#define __ARCH_WANT_SYS_VFORK +#define __ARCH_WANT_SYS_FORK #include <asm-generic/unistd.h> diff --git a/arch/hexagon/include/uapi/asm/user.h b/arch/hexagon/include/uapi/asm/user.h index cef13ee1413..3dae94d9ced 100644 --- a/arch/hexagon/include/uapi/asm/user.h +++ b/arch/hexagon/include/uapi/asm/user.h @@ -55,9 +55,15 @@ struct user_regs_struct { unsigned long pc; unsigned long cause; unsigned long badva; +#if CONFIG_HEXAGON_ARCH_VERSION < 4 unsigned long pad1; /* pad out to 48 words total */ unsigned long pad2; /* pad out to 48 words total */ unsigned long pad3; /* pad out to 48 words total */ +#else + unsigned long cs0; + unsigned long cs1; + unsigned long pad1; /* pad out to 48 words total */ +#endif }; #endif diff --git a/arch/hexagon/kernel/Makefile b/arch/hexagon/kernel/Makefile index 6c19501b487..009228b8611 100644 --- a/arch/hexagon/kernel/Makefile +++ b/arch/hexagon/kernel/Makefile @@ -1,6 +1,6 @@ extra-y := head.o vmlinux.lds -obj-$(CONFIG_SMP) += smp.o topology.o +obj-$(CONFIG_SMP) += smp.o obj-y += setup.o irq_cpu.o traps.o syscalltab.o signal.o time.o obj-y += process.o trampoline.o reset.o ptrace.o vdso.o @@ -15,3 +15,5 @@ obj-y += vm_vectors.o obj-$(CONFIG_HAS_DMA) += dma.o obj-$(CONFIG_STACKTRACE) += stacktrace.o + +obj-$(CONFIG_VGA_CONSOLE) += screen_info.o diff --git a/arch/hexagon/kernel/asm-offsets.c b/arch/hexagon/kernel/asm-offsets.c index 2d5e84d3b00..308be68d4fb 100644 --- a/arch/hexagon/kernel/asm-offsets.c +++ b/arch/hexagon/kernel/asm-offsets.c @@ -5,7 +5,7 @@ * Kevin Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com * Copyright (C) 2000 MIPS Technologies, Inc. * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -44,7 +44,8 @@ int main(void) COMMENT("Hexagon pt_regs definitions"); OFFSET(_PT_SYSCALL_NR, pt_regs, syscall_nr); - OFFSET(_PT_UGPGP, pt_regs, ugpgp); + OFFSET(_PT_GPUGP, pt_regs, gpugp); + OFFSET(_PT_CS1CS0, pt_regs, cs1cs0); OFFSET(_PT_R3130, pt_regs, r3130); OFFSET(_PT_R2928, pt_regs, r2928); OFFSET(_PT_R2726, pt_regs, r2726); diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c index 65c7bdcf565..b74f9bae31a 100644 --- a/arch/hexagon/kernel/dma.c +++ b/arch/hexagon/kernel/dma.c @@ -1,7 +1,7 @@ /* * DMA implementation for Hexagon * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -23,12 +23,18 @@ #include <linux/genalloc.h> #include <asm/dma-mapping.h> #include <linux/module.h> +#include <asm/page.h> struct dma_map_ops *dma_ops; EXPORT_SYMBOL(dma_ops); int bad_dma_address; /* globals are automatically initialized to zero */ +static inline void *dma_addr_to_virt(dma_addr_t dma_addr) +{ + return phys_to_virt((unsigned long) dma_addr); +} + int dma_supported(struct device *dev, u64 mask) { if (mask == DMA_BIT_MASK(32)) @@ -60,6 +66,12 @@ static void *hexagon_dma_alloc_coherent(struct device *dev, size_t size, { void *ret; + /* + * Our max_low_pfn should have been backed off by 16MB in + * mm/init.c to create DMA coherent space. Use that as the VA + * for the pool. + */ + if (coherent_pool == NULL) { coherent_pool = gen_pool_create(PAGE_SHIFT, -1); @@ -67,7 +79,7 @@ static void *hexagon_dma_alloc_coherent(struct device *dev, size_t size, panic("Can't create %s() memory pool!", __func__); else gen_pool_add(coherent_pool, - (PAGE_OFFSET + (max_low_pfn << PAGE_SHIFT)), + pfn_to_virt(max_low_pfn), hexagon_coherent_pool_size, -1); } @@ -75,7 +87,7 @@ static void *hexagon_dma_alloc_coherent(struct device *dev, size_t size, if (ret) { memset(ret, 0, size); - *dma_addr = (dma_addr_t) (ret - PAGE_OFFSET); + *dma_addr = (dma_addr_t) virt_to_phys(ret); } else *dma_addr = ~0; @@ -118,8 +130,8 @@ static int hexagon_map_sg(struct device *hwdev, struct scatterlist *sg, s->dma_length = s->length; - flush_dcache_range(PAGE_OFFSET + s->dma_address, - PAGE_OFFSET + s->dma_address + s->length); + flush_dcache_range(dma_addr_to_virt(s->dma_address), + dma_addr_to_virt(s->dma_address + s->length)); } return nents; @@ -149,11 +161,6 @@ static inline void dma_sync(void *addr, size_t size, } } -static inline void *dma_addr_to_virt(dma_addr_t dma_addr) -{ - return phys_to_virt((unsigned long) dma_addr); -} - /** * hexagon_map_page() - maps an address for device DMA * @dev: pointer to DMA device diff --git a/arch/hexagon/kernel/head.S b/arch/hexagon/kernel/head.S index d859402c73b..b9b63d085db 100644 --- a/arch/hexagon/kernel/head.S +++ b/arch/hexagon/kernel/head.S @@ -1,7 +1,7 @@ /* * Early kernel startup code for Hexagon * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * * This program is free software; you can redistribute it and/or modify @@ -25,6 +25,9 @@ #include <asm/mem-layout.h> #include <asm/vm_mmu.h> #include <asm/page.h> +#include <asm/hexagon_vm.h> + +#define SEGTABLE_ENTRIES #0x0e0 __INIT ENTRY(stext) @@ -43,40 +46,93 @@ ENTRY(stext) * Symbol is kernel segment address, but we need * the logical/physical address. */ - r24 = asl(r24, #2) - r24 = lsr(r24, #2) + r25 = pc; + r2.h = #0xffc0; + r2.l = #0x0000; + r25 = and(r2,r25); /* R25 holds PHYS_OFFSET now */ + r1.h = #HI(PAGE_OFFSET); + r1.l = #LO(PAGE_OFFSET); + r24 = sub(r24,r1); /* swapper_pg_dir - PAGE_OFFSET */ + r24 = add(r24,r25); /* + PHYS_OFFSET */ - r0 = r24 + r0 = r24; /* aka __pa(swapper_pg_dir) */ /* - * Initialize a 16MB PTE to make the virtual and physical + * Initialize page dir to make the virtual and physical * addresses where the kernel was loaded be identical. + * Done in 4MB chunks. */ #define PTE_BITS ( __HVM_PTE_R | __HVM_PTE_W | __HVM_PTE_X \ | __HEXAGON_C_WB_L2 << 6 \ | __HVM_PDE_S_4MB) - r1 = pc - r2.H = #0xffc0 - r2.L = #0x0000 - r1 = and(r1,r2) /* round PC to 4MB boundary */ + /* + * Get number of VA=PA entries; only really needed for jump + * to hyperspace; gets blown away immediately after + */ + + { + r1.l = #LO(_end); + r2.l = #LO(stext); + r3 = #1; + } + { + r1.h = #HI(_end); + r2.h = #HI(stext); + r3 = asl(r3, #22); + } + { + r1 = sub(r1, r2); + r3 = add(r3, #-1); + } /* r1 = _end - stext */ + r1 = add(r1, r3); /* + (4M-1) */ + r26 = lsr(r1, #22); /* / 4M = # of entries */ + + r1 = r25; + r2.h = #0xffc0; + r2.l = #0x0000; /* round back down to 4MB boundary */ + r1 = and(r1,r2); r2 = lsr(r1, #22) /* 4MB page number */ r2 = asl(r2, #2) /* times sizeof(PTE) (4bytes) */ r0 = add(r0,r2) /* r0 = address of correct PTE */ r2 = #PTE_BITS r1 = add(r1,r2) /* r1 = 4MB PTE for the first entry */ r2.h = #0x0040 - r2.l = #0x0000 /* 4MB */ - memw(r0 ++ #4) = r1 - r1 = add(r1, r2) + r2.l = #0x0000 /* 4MB increments */ + loop0(1f,r26); +1: memw(r0 ++ #4) = r1 + { r1 = add(r1, r2); } :endloop0 + + /* Also need to overwrite the initial 0xc0000000 entries */ + /* PAGE_OFFSET >> (4MB shift - 4 bytes per entry shift) */ + R1.H = #HI(PAGE_OFFSET >> (22 - 2)) + R1.L = #LO(PAGE_OFFSET >> (22 - 2)) + + r0 = add(r1, r24); /* advance to 0xc0000000 entry */ + r1 = r25; + r2.h = #0xffc0; + r2.l = #0x0000; /* round back down to 4MB boundary */ + r1 = and(r1,r2); /* for huge page */ + r2 = #PTE_BITS + r1 = add(r1,r2); + r2.h = #0x0040 + r2.l = #0x0000 /* 4MB increments */ - r0 = r24 + loop0(1f,SEGTABLE_ENTRIES); +1: + memw(r0 ++ #4) = r1; + { r1 = add(r1,r2); } :endloop0 + + r0 = r24; /* * The subroutine wrapper around the virtual instruction touches * no memory, so we should be able to use it even here. + * Note that in this version, R1 and R2 get "clobbered"; see + * vm_ops.S */ + r1 = #VM_TRANS_TYPE_TABLE call __vmnewmap; /* Jump into virtual address range. */ @@ -90,17 +146,29 @@ ENTRY(stext) __head_s_vaddr_target: /* * Tear down VA=PA translation now that we are running - * in the desgnated kernel segments. + * in kernel virtual space. */ r0 = #__HVM_PDE_S_INVALID - r1 = r24 - loop0(1f,#0x100) + + r1.h = #0xffc0; + r1.l = #0x0000; + r2 = r25; /* phys_offset */ + r2 = and(r1,r2); + + r1.l = #lo(swapper_pg_dir) + r1.h = #hi(swapper_pg_dir) + r2 = lsr(r2, #22) /* 4MB page number */ + r2 = asl(r2, #2) /* times sizeof(PTE) (4bytes) */ + r1 = add(r1,r2); + loop0(1f,r26) + 1: { memw(R1 ++ #4) = R0 }:endloop0 r0 = r24 + r1 = #VM_TRANS_TYPE_TABLE call __vmnewmap /* Go ahead and install the trap0 return so angel calls work */ @@ -143,6 +211,13 @@ __head_s_vaddr_target: r2 = sub(r2,r0); call memset; + /* Set PHYS_OFFSET; should be in R25 */ +#ifdef CONFIG_HEXAGON_PHYS_OFFSET + r0.l = #LO(__phys_offset); + r0.h = #HI(__phys_offset); + memw(r0) = r25; +#endif + /* Time to make the doughnuts. */ call start_kernel diff --git a/arch/hexagon/kernel/hexagon_ksyms.c b/arch/hexagon/kernel/hexagon_ksyms.c index 32b1379d687..c041d8ecb1e 100644 --- a/arch/hexagon/kernel/hexagon_ksyms.c +++ b/arch/hexagon/kernel/hexagon_ksyms.c @@ -18,23 +18,39 @@ * 02110-1301, USA. */ +#include <linux/dma-mapping.h> #include <asm/hexagon_vm.h> +#include <asm/io.h> #include <asm/uaccess.h> +/* Additional functions */ +EXPORT_SYMBOL(__clear_user_hexagon); EXPORT_SYMBOL(__copy_from_user_hexagon); EXPORT_SYMBOL(__copy_to_user_hexagon); +EXPORT_SYMBOL(__iounmap); +EXPORT_SYMBOL(__strnlen_user); EXPORT_SYMBOL(__vmgetie); EXPORT_SYMBOL(__vmsetie); +EXPORT_SYMBOL(__vmyield); +EXPORT_SYMBOL(empty_zero_page); +EXPORT_SYMBOL(ioremap_nocache); EXPORT_SYMBOL(memcpy); EXPORT_SYMBOL(memset); +/* Additional variables */ +EXPORT_SYMBOL(__phys_offset); +EXPORT_SYMBOL(_dflt_cache_att); +EXPORT_SYMBOL(bad_dma_address); + #define DECLARE_EXPORT(name) \ extern void name(void); EXPORT_SYMBOL(name) /* Symbols found in libgcc that assorted kernel modules need */ DECLARE_EXPORT(__hexagon_memcpy_likely_aligned_min32bytes_mult8bytes); -DECLARE_EXPORT(__hexagon_divsi3); -DECLARE_EXPORT(__hexagon_modsi3); -DECLARE_EXPORT(__hexagon_udivsi3); -DECLARE_EXPORT(__hexagon_umodsi3); +/* Additional functions */ +DECLARE_EXPORT(__divsi3); +DECLARE_EXPORT(__modsi3); +DECLARE_EXPORT(__udivsi3); +DECLARE_EXPORT(__umodsi3); +DECLARE_EXPORT(csum_tcpudp_magic); diff --git a/arch/hexagon/kernel/kgdb.c b/arch/hexagon/kernel/kgdb.c index 34464537064..038580cc5ab 100644 --- a/arch/hexagon/kernel/kgdb.c +++ b/arch/hexagon/kernel/kgdb.c @@ -1,7 +1,7 @@ /* * arch/hexagon/kernel/kgdb.c - Hexagon KGDB Support * - * Copyright (c) 2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2011-2012, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -18,6 +18,8 @@ * 02110-1301, USA. */ +#include <linux/irq.h> +#include <linux/sched.h> #include <linux/kdebug.h> #include <linux/kgdb.h> @@ -70,6 +72,8 @@ struct dbg_reg_def_t dbg_reg_def[DBG_MAX_REG_NUM] = { { "lc1", GDB_SIZEOF_REG, offsetof(struct pt_regs, lc1)}, { " gp", GDB_SIZEOF_REG, offsetof(struct pt_regs, gp)}, { "ugp", GDB_SIZEOF_REG, offsetof(struct pt_regs, ugp)}, + { "cs0", GDB_SIZEOF_REG, offsetof(struct pt_regs, cs0)}, + { "cs1", GDB_SIZEOF_REG, offsetof(struct pt_regs, cs1)}, { "psp", GDB_SIZEOF_REG, offsetof(struct pt_regs, hvmer.vmpsp)}, { "elr", GDB_SIZEOF_REG, offsetof(struct pt_regs, hvmer.vmel)}, { "est", GDB_SIZEOF_REG, offsetof(struct pt_regs, hvmer.vmest)}, diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c index 06ae9ffcabd..0a0dd5c05b4 100644 --- a/arch/hexagon/kernel/process.c +++ b/arch/hexagon/kernel/process.c @@ -24,6 +24,7 @@ #include <linux/tick.h> #include <linux/uaccess.h> #include <linux/slab.h> +#include <linux/tracehook.h> /* * Program thread launch. Often defined as a macro in processor.h, @@ -51,28 +52,11 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp) * If hardware or VM offer wait termination even though interrupts * are disabled. */ -static void default_idle(void) +void arch_cpu_idle(void) { __vmwait(); -} - -void (*idle_sleep)(void) = default_idle; - -void cpu_idle(void) -{ - while (1) { - tick_nohz_idle_enter(); - local_irq_disable(); - while (!need_resched()) { - idle_sleep(); - /* interrupts wake us up, but aren't serviced */ - local_irq_enable(); /* service interrupt */ - local_irq_disable(); - } - local_irq_enable(); - tick_nohz_idle_exit(); - schedule(); - } + /* interrupts wake us up, but irqs are still disabled */ + local_irq_enable(); } /* @@ -112,7 +96,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, if (unlikely(p->flags & PF_KTHREAD)) { memset(childregs, 0, sizeof(struct pt_regs)); /* r24 <- fn, r25 <- arg */ - ss->r2524 = usp | ((u64)arg << 32); + ss->r24 = usp; + ss->r25 = arg; pt_set_kmode(childregs); return 0; } @@ -202,3 +187,41 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) { return 0; } + + +/* + * Called on the exit path of event entry; see vm_entry.S + * + * Interrupts will already be disabled. + * + * Returns 0 if there's no need to re-check for more work. + */ + +int do_work_pending(struct pt_regs *regs, u32 thread_info_flags) +{ + if (!(thread_info_flags & _TIF_WORK_MASK)) { + return 0; + } /* shortcut -- no work to be done */ + + local_irq_enable(); + + if (thread_info_flags & _TIF_NEED_RESCHED) { + schedule(); + return 1; + } + + if (thread_info_flags & _TIF_SIGPENDING) { + do_signal(regs); + return 1; + } + + if (thread_info_flags & _TIF_NOTIFY_RESUME) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + return 1; + } + + /* Should not even reach here */ + panic("%s: bad thread_info flags 0x%08x\n", __func__, + thread_info_flags); +} diff --git a/arch/hexagon/kernel/ptrace.c b/arch/hexagon/kernel/ptrace.c index 670b1b0bee6..390a9ad14ca 100644 --- a/arch/hexagon/kernel/ptrace.c +++ b/arch/hexagon/kernel/ptrace.c @@ -1,7 +1,7 @@ /* * Ptrace support for Hexagon * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -32,6 +32,21 @@ #include <asm/user.h> +#if arch_has_single_step() +/* Both called from ptrace_resume */ +void user_enable_single_step(struct task_struct *child) +{ + pt_set_singlestep(task_pt_regs(child)); + set_tsk_thread_flag(child, TIF_SINGLESTEP); +} + +void user_disable_single_step(struct task_struct *child) +{ + pt_clr_singlestep(task_pt_regs(child)); + clear_tsk_thread_flag(child, TIF_SINGLESTEP); +} +#endif + static int genregs_get(struct task_struct *target, const struct user_regset *regset, unsigned int pos, unsigned int count, @@ -76,6 +91,10 @@ static int genregs_get(struct task_struct *target, dummy = pt_cause(regs); ONEXT(&dummy, cause); ONEXT(&pt_badva(regs), badva); +#if CONFIG_HEXAGON_ARCH_VERSION >=4 + ONEXT(®s->cs0, cs0); + ONEXT(®s->cs1, cs1); +#endif /* Pad the rest with zeros, if needed */ if (!ret) @@ -123,6 +142,11 @@ static int genregs_set(struct task_struct *target, INEXT(&bucket, cause); INEXT(&bucket, badva); +#if CONFIG_HEXAGON_ARCH_VERSION >=4 + INEXT(®s->cs0, cs0); + INEXT(®s->cs1, cs1); +#endif + /* Ignore the rest, if needed */ if (!ret) ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, @@ -159,6 +183,7 @@ static const struct user_regset_view hexagon_user_view = { .e_machine = ELF_ARCH, .ei_osabi = ELF_OSABI, .regsets = hexagon_regsets, + .e_flags = ELF_CORE_EFLAGS, .n = ARRAY_SIZE(hexagon_regsets) }; diff --git a/arch/hexagon/kernel/reset.c b/arch/hexagon/kernel/reset.c index 6aeabc962b3..76483c10130 100644 --- a/arch/hexagon/kernel/reset.c +++ b/arch/hexagon/kernel/reset.c @@ -33,6 +33,5 @@ void machine_restart(char *cmd) { } -void pm_power_off(void) -{ -} +void (*pm_power_off)(void) = NULL; +EXPORT_SYMBOL(pm_power_off); diff --git a/arch/hexagon/kernel/screen_info.c b/arch/hexagon/kernel/screen_info.c new file mode 100644 index 00000000000..1e1ceb18baf --- /dev/null +++ b/arch/hexagon/kernel/screen_info.c @@ -0,0 +1,3 @@ +#include <linux/screen_info.h> + +struct screen_info screen_info; diff --git a/arch/hexagon/kernel/setup.c b/arch/hexagon/kernel/setup.c index 94a38783500..0e7c1dbb37b 100644 --- a/arch/hexagon/kernel/setup.c +++ b/arch/hexagon/kernel/setup.c @@ -1,7 +1,7 @@ /* * Arch related setup for Hexagon * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -32,16 +32,13 @@ #include <asm/hexagon_vm.h> #include <asm/vm_mmu.h> #include <asm/time.h> -#ifdef CONFIG_OF -#include <asm/prom.h> -#endif char cmd_line[COMMAND_LINE_SIZE]; static char default_command_line[COMMAND_LINE_SIZE] __initdata = CONFIG_CMDLINE; int on_simulator; -void __cpuinit calibrate_delay(void) +void calibrate_delay(void) { loops_per_jiffy = thread_freq_mhz * 1000000 / HZ; } @@ -68,6 +65,8 @@ void __init setup_arch(char **cmdline_p) */ __vmsetvec(_K_VM_event_vector); + printk(KERN_INFO "PHYS_OFFSET=0x%08x\n", PHYS_OFFSET); + /* * Simulator has a few differences from the hardware. * For now, check uninitialized-but-mapped memory @@ -128,6 +127,11 @@ static int show_cpuinfo(struct seq_file *m, void *v) { int cpu = (unsigned long) v - 1; +#ifdef CONFIG_SMP + if (!cpu_online(cpu)) + return 0; +#endif + seq_printf(m, "processor\t: %d\n", cpu); seq_printf(m, "model name\t: Hexagon Virtual Machine\n"); seq_printf(m, "BogoMips\t: %lu.%02lu\n", diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c index fe0d1373165..d7c73874b51 100644 --- a/arch/hexagon/kernel/signal.c +++ b/arch/hexagon/kernel/signal.c @@ -1,7 +1,7 @@ /* * Signal support for Hexagon processor * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -41,6 +41,10 @@ static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, { unsigned long sp = regs->r29; + /* check if we would overflow the alt stack */ + if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size))) + return (void __user __force *)-1UL; + /* Switch to signal stack if appropriate */ if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0)) sp = current->sas_ss_sp + current->sas_ss_size; @@ -66,7 +70,10 @@ static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc) err |= __put_user(regs->preds, &sc->sc_regs.p3_0); err |= __put_user(regs->gp, &sc->sc_regs.gp); err |= __put_user(regs->ugp, &sc->sc_regs.ugp); - +#if CONFIG_HEXAGON_ARCH_VERSION >= 4 + err |= __put_user(regs->cs0, &sc->sc_regs.cs0); + err |= __put_user(regs->cs1, &sc->sc_regs.cs1); +#endif tmp = pt_elr(regs); err |= __put_user(tmp, &sc->sc_regs.pc); tmp = pt_cause(regs); err |= __put_user(tmp, &sc->sc_regs.cause); tmp = pt_badva(regs); err |= __put_user(tmp, &sc->sc_regs.badva); @@ -93,7 +100,10 @@ static int restore_sigcontext(struct pt_regs *regs, err |= __get_user(regs->preds, &sc->sc_regs.p3_0); err |= __get_user(regs->gp, &sc->sc_regs.gp); err |= __get_user(regs->ugp, &sc->sc_regs.ugp); - +#if CONFIG_HEXAGON_ARCH_VERSION >= 4 + err |= __get_user(regs->cs0, &sc->sc_regs.cs0); + err |= __get_user(regs->cs1, &sc->sc_regs.cs1); +#endif err |= __get_user(tmp, &sc->sc_regs.pc); pt_set_elr(regs, tmp); return err; @@ -125,6 +135,7 @@ static int setup_rt_frame(int signr, struct k_sigaction *ka, siginfo_t *info, err |= __put_user(0x5400c004, &frame->tramp[1]); err |= setup_sigcontext(regs, &frame->uc.uc_mcontext); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); + err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs)); if (err) goto sigsegv; @@ -192,7 +203,7 @@ static void handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka, /* * Called from return-from-event code. */ -static void do_signal(struct pt_regs *regs) +void do_signal(struct pt_regs *regs) { struct k_sigaction sigact; siginfo_t info; @@ -209,8 +220,9 @@ static void do_signal(struct pt_regs *regs) } /* - * If we came from a system call, handle the restart. + * No (more) signals; if we came from a system call, handle the restart. */ + if (regs->syscall_nr >= 0) { switch (regs->r00) { case -ERESTARTNOHAND: @@ -233,26 +245,9 @@ no_restart: restore_saved_sigmask(); } -void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) -{ - if (thread_info_flags & _TIF_SIGPENDING) - do_signal(regs); - - if (thread_info_flags & _TIF_NOTIFY_RESUME) { - clear_thread_flag(TIF_NOTIFY_RESUME); - tracehook_notify_resume(regs); - } -} - /* * Architecture-specific wrappers for signal-related system calls */ -asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss) -{ - struct pt_regs *regs = current_pt_regs(); - - return do_sigaltstack(uss, uoss, regs->r29); -} asmlinkage int sys_rt_sigreturn(void) { @@ -277,28 +272,12 @@ asmlinkage int sys_rt_sigreturn(void) /* Restore the user's stack as well */ pt_psp(regs) = regs->r29; - /* - * Leave a trace in the stack frame that this was a sigreturn. - * If the system call is to replay, we've already restored the - * number in the GPR slot and it will be regenerated on the - * new system call trap entry. Note that if restore_sigcontext() - * did something other than a bulk copy of the pt_regs struct, - * we could avoid this assignment by simply not overwriting - * regs->syscall_nr. - */ - regs->syscall_nr = __NR_rt_sigreturn; + regs->syscall_nr = -1; - /* - * If we were meticulous, we'd only call this if we knew that - * we were actually going to use an alternate stack, and we'd - * consider any error to be fatal. What we do here, in common - * with many other architectures, is call it blindly and only - * consider the -EFAULT return case to be proof of a problem. - */ - if (do_sigaltstack(&frame->uc.uc_stack, NULL, pt_psp(regs)) == -EFAULT) + if (restore_altstack(&frame->uc.uc_stack)) goto badframe; - return 0; + return regs->r00; badframe: force_sig(SIGSEGV, current); diff --git a/arch/hexagon/kernel/smp.c b/arch/hexagon/kernel/smp.c index 8e095dffd07..ff759f26b96 100644 --- a/arch/hexagon/kernel/smp.c +++ b/arch/hexagon/kernel/smp.c @@ -64,10 +64,6 @@ static inline void __handle_ipi(unsigned long *ops, struct ipi_data *ipi, generic_smp_call_function_interrupt(); break; - case IPI_CALL_FUNC_SINGLE: - generic_smp_call_function_single_interrupt(); - break; - case IPI_CPU_STOP: /* * call vmstop() @@ -146,7 +142,7 @@ void __init smp_prepare_boot_cpu(void) * to point to current thread info */ -void __cpuinit start_secondary(void) +void start_secondary(void) { unsigned int cpu; unsigned long thread_ptr; @@ -184,7 +180,7 @@ void __cpuinit start_secondary(void) local_irq_enable(); - cpu_idle(); + cpu_startup_entry(CPUHP_ONLINE); } @@ -194,7 +190,7 @@ void __cpuinit start_secondary(void) * maintains control until "cpu_online(cpu)" is set. */ -int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *idle) +int __cpu_up(unsigned int cpu, struct task_struct *idle) { struct thread_info *thread = (struct thread_info *)idle->stack; void *stack_start; @@ -248,7 +244,7 @@ void smp_send_stop(void) void arch_send_call_function_single_ipi(int cpu) { - send_ipi(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE); + send_ipi(cpumask_of(cpu), IPI_CALL_FUNC); } void arch_send_call_function_ipi_mask(const struct cpumask *mask) diff --git a/arch/hexagon/kernel/time.c b/arch/hexagon/kernel/time.c index 9903fad997f..17fbf45bf15 100644 --- a/arch/hexagon/kernel/time.c +++ b/arch/hexagon/kernel/time.c @@ -191,9 +191,6 @@ void __init time_init_deferred(void) { struct resource *resource = NULL; struct clock_event_device *ce_dev = &hexagon_clockevent_dev; - struct device_node *dn; - struct resource r; - int err; ce_dev->cpumask = cpu_all_mask; @@ -232,6 +229,15 @@ void __init time_init(void) late_time_init = time_init_deferred; } +void __delay(unsigned long cycles) +{ + unsigned long long start = __vmgettime(); + + while ((__vmgettime() - start) < cycles) + cpu_relax(); +} +EXPORT_SYMBOL(__delay); + /* * This could become parametric or perhaps even computed at run-time, * but for now we take the observed simulator jitter. diff --git a/arch/hexagon/kernel/topology.c b/arch/hexagon/kernel/topology.c deleted file mode 100644 index 352f27e809f..00000000000 --- a/arch/hexagon/kernel/topology.c +++ /dev/null @@ -1,52 +0,0 @@ -/* - * CPU topology for Hexagon - * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#include <linux/cpu.h> -#include <linux/cpumask.h> -#include <linux/init.h> -#include <linux/node.h> -#include <linux/nodemask.h> -#include <linux/percpu.h> - -/* Swiped from MIPS. */ - -static DEFINE_PER_CPU(struct cpu, cpu_devices); - -static int __init topology_init(void) -{ - int i, ret; - - for_each_present_cpu(i) { - - /* - * register_cpu takes a per_cpu pointer and - * just points it at another per_cpu struct... - */ - - ret = register_cpu(&per_cpu(cpu_devices, i), i); - if (ret) - printk(KERN_WARNING "topology_init: register_cpu %d " - "failed (%d)\n", i, ret); - } - - return 0; -} - -subsys_initcall(topology_init); diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c index a41eeb8eeaa..7858663352b 100644 --- a/arch/hexagon/kernel/traps.c +++ b/arch/hexagon/kernel/traps.c @@ -1,7 +1,7 @@ /* * Kernel traps/events for Hexagon processor * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -65,6 +65,10 @@ static const char *ex_name(int ex) return "Write protection fault"; case HVM_GE_C_XMAL: return "Misaligned instruction"; + case HVM_GE_C_WREG: + return "Multiple writes to same register in packet"; + case HVM_GE_C_PCAL: + return "Program counter values that are not properly aligned"; case HVM_GE_C_RMAL: return "Misaligned data load"; case HVM_GE_C_WMAL: @@ -191,14 +195,6 @@ void show_stack(struct task_struct *task, unsigned long *fp) do_show_stack(task, fp, 0); } -void dump_stack(void) -{ - unsigned long *fp; - asm("%0 = r30" : "=r" (fp)); - show_stack(current, fp); -} -EXPORT_SYMBOL(dump_stack); - int die(const char *str, struct pt_regs *regs, long err) { static struct { @@ -225,7 +221,7 @@ int die(const char *str, struct pt_regs *regs, long err) do_show_stack(current, ®s->r30, pt_elr(regs)); bust_spinlocks(0); - add_taint(TAINT_DIE); + add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE); spin_unlock_irq(&die.lock); @@ -324,6 +320,12 @@ void do_genex(struct pt_regs *regs) case HVM_GE_C_XMAL: misaligned_instruction(regs); break; + case HVM_GE_C_WREG: + illegal_instruction(regs); + break; + case HVM_GE_C_PCAL: + misaligned_instruction(regs); + break; case HVM_GE_C_RMAL: misaligned_data_load(regs); break; @@ -356,7 +358,6 @@ long sys_syscall(void) void do_trap0(struct pt_regs *regs) { - unsigned long syscallret = 0; syscall_fn syscall; switch (pt_cause(regs)) { @@ -396,21 +397,11 @@ void do_trap0(struct pt_regs *regs) } else { syscall = (syscall_fn) (sys_call_table[regs->syscall_nr]); - syscallret = syscall(regs->r00, regs->r01, + regs->r00 = syscall(regs->r00, regs->r01, regs->r02, regs->r03, regs->r04, regs->r05); } - /* - * If it was a sigreturn system call, don't overwrite - * r0 value in stack frame with return value. - * - * __NR_sigreturn doesn't seem to exist in new unistd.h - */ - - if (regs->syscall_nr != __NR_rt_sigreturn) - regs->r00 = syscallret; - /* allow strace to get the syscall return state */ if (unlikely(test_thread_flag(TIF_SYSCALL_TRACE))) tracehook_report_syscall_exit(regs, 0); @@ -452,3 +443,14 @@ void do_machcheck(struct pt_regs *regs) /* Halt and catch fire */ __vmstop(); } + +/* + * Treat this like the old 0xdb trap. + */ + +void do_debug_exception(struct pt_regs *regs) +{ + regs->hvmer.vmest &= ~HVM_VMEST_CAUSE_MSK; + regs->hvmer.vmest |= (TRAP_DEBUG << HVM_VMEST_CAUSE_SFT); + do_trap0(regs); +} diff --git a/arch/hexagon/kernel/vm_entry.S b/arch/hexagon/kernel/vm_entry.S index 425e50c694f..67c6ccc1477 100644 --- a/arch/hexagon/kernel/vm_entry.S +++ b/arch/hexagon/kernel/vm_entry.S @@ -1,7 +1,7 @@ /* * Event entry/exit for Hexagon * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -45,48 +45,88 @@ * number in the case where we decode a system call (trap0(#1)). */ +#if CONFIG_HEXAGON_ARCH_VERSION < 4 #define save_pt_regs()\ - memd(R0 + #_PT_R3130) = R31:30; \ + memd(R0 + #_PT_R3130) = R31:30; \ + { memw(R0 + #_PT_R2928) = R28; \ + R31 = memw(R0 + #_PT_ER_VMPSP); }\ + { memw(R0 + #(_PT_R2928 + 4)) = R31; \ + R31 = ugp; } \ + { memd(R0 + #_PT_R2726) = R27:26; \ + R30 = gp ; } \ + memd(R0 + #_PT_R2524) = R25:24; \ + memd(R0 + #_PT_R2322) = R23:22; \ + memd(R0 + #_PT_R2120) = R21:20; \ + memd(R0 + #_PT_R1918) = R19:18; \ + memd(R0 + #_PT_R1716) = R17:16; \ + memd(R0 + #_PT_R1514) = R15:14; \ + memd(R0 + #_PT_R1312) = R13:12; \ + { memd(R0 + #_PT_R1110) = R11:10; \ + R15 = lc0; } \ + { memd(R0 + #_PT_R0908) = R9:8; \ + R14 = sa0; } \ + { memd(R0 + #_PT_R0706) = R7:6; \ + R13 = lc1; } \ + { memd(R0 + #_PT_R0504) = R5:4; \ + R12 = sa1; } \ + { memd(R0 + #_PT_GPUGP) = R31:30; \ + R11 = m1; \ + R2.H = #HI(_THREAD_SIZE); } \ + { memd(R0 + #_PT_LC0SA0) = R15:14; \ + R10 = m0; \ + R2.L = #LO(_THREAD_SIZE); } \ + { memd(R0 + #_PT_LC1SA1) = R13:12; \ + R15 = p3:0; \ + R2 = neg(R2); } \ + { memd(R0 + #_PT_M1M0) = R11:10; \ + R14 = usr; \ + R2 = and(R0,R2); } \ + { memd(R0 + #_PT_PREDSUSR) = R15:14; \ + THREADINFO_REG = R2; } \ + { r24 = memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS); \ + memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS) = R0; \ + R2 = #-1; } \ + { memw(R0 + #_PT_SYSCALL_NR) = R2; \ + R30 = #0; } +#else +/* V4+ */ +/* the # ## # syntax inserts a literal ## */ +#define save_pt_regs()\ + { memd(R0 + #_PT_R3130) = R31:30; \ + R30 = memw(R0 + #_PT_ER_VMPSP); }\ { memw(R0 + #_PT_R2928) = R28; \ - R31 = memw(R0 + #_PT_ER_VMPSP); }\ - { memw(R0 + #(_PT_R2928 + 4)) = R31; \ - R31 = ugp; } \ - { memd(R0 + #_PT_R2726) = R27:26; \ - R30 = gp ; } \ - memd(R0 + #_PT_R2524) = R25:24; \ - memd(R0 + #_PT_R2322) = R23:22; \ - memd(R0 + #_PT_R2120) = R21:20; \ - memd(R0 + #_PT_R1918) = R19:18; \ - memd(R0 + #_PT_R1716) = R17:16; \ - memd(R0 + #_PT_R1514) = R15:14; \ - memd(R0 + #_PT_R1312) = R13:12; \ + memw(R0 + #(_PT_R2928 + 4)) = R30; }\ + { R31:30 = C11:10; \ + memd(R0 + #_PT_R2726) = R27:26; \ + memd(R0 + #_PT_R2524) = R25:24; }\ + { memd(R0 + #_PT_R2322) = R23:22; \ + memd(R0 + #_PT_R2120) = R21:20; }\ + { memd(R0 + #_PT_R1918) = R19:18; \ + memd(R0 + #_PT_R1716) = R17:16; }\ + { memd(R0 + #_PT_R1514) = R15:14; \ + memd(R0 + #_PT_R1312) = R13:12; \ + R17:16 = C13:12; }\ { memd(R0 + #_PT_R1110) = R11:10; \ - R15 = lc0; } \ - { memd(R0 + #_PT_R0908) = R9:8; \ - R14 = sa0; } \ + memd(R0 + #_PT_R0908) = R9:8; \ + R15:14 = C1:0; } \ { memd(R0 + #_PT_R0706) = R7:6; \ - R13 = lc1; } \ - { memd(R0 + #_PT_R0504) = R5:4; \ - R12 = sa1; } \ - { memd(R0 + #_PT_UGPGP) = R31:30; \ - R11 = m1; \ - R2.H = #HI(_THREAD_SIZE); } \ - { memd(R0 + #_PT_LC0SA0) = R15:14; \ - R10 = m0; \ - R2.L = #LO(_THREAD_SIZE); } \ - { memd(R0 + #_PT_LC1SA1) = R13:12; \ - R15 = p3:0; \ - R2 = neg(R2); } \ + memd(R0 + #_PT_R0504) = R5:4; \ + R13:12 = C3:2; } \ + { memd(R0 + #_PT_GPUGP) = R31:30; \ + memd(R0 + #_PT_LC0SA0) = R15:14; \ + R11:10 = C7:6; }\ + { THREADINFO_REG = and(R0, # ## #-_THREAD_SIZE); \ + memd(R0 + #_PT_LC1SA1) = R13:12; \ + R15 = p3:0; }\ { memd(R0 + #_PT_M1M0) = R11:10; \ - R14 = usr; \ - R2 = and(R0,R2); } \ - { memd(R0 + #_PT_PREDSUSR) = R15:14; \ - THREADINFO_REG = R2; } \ + memw(R0 + #_PT_PREDSUSR + 4) = R15; }\ { r24 = memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS); \ memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS) = R0; \ R2 = #-1; } \ { memw(R0 + #_PT_SYSCALL_NR) = R2; \ + memd(R0 + #_PT_CS1CS0) = R17:16; \ R30 = #0; } +#endif /* * Restore registers and thread_info.regs state. THREADINFO_REG @@ -94,6 +134,7 @@ * preserved. Don't restore R29 (SP) until later. */ +#if CONFIG_HEXAGON_ARCH_VERSION < 4 #define restore_pt_regs() \ { memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS) = R24; \ R15:14 = memd(R0 + #_PT_PREDSUSR); } \ @@ -121,11 +162,44 @@ R23:22 = memd(R0 + #_PT_R2322); } \ { R25:24 = memd(R0 + #_PT_R2524); \ R27:26 = memd(R0 + #_PT_R2726); } \ - R31:30 = memd(R0 + #_PT_UGPGP); \ + R31:30 = memd(R0 + #_PT_GPUGP); \ { R28 = memw(R0 + #_PT_R2928); \ ugp = R31; } \ { R31:30 = memd(R0 + #_PT_R3130); \ gp = R30; } +#else +/* V4+ */ +#define restore_pt_regs() \ + { memw(THREADINFO_REG + #_THREAD_INFO_PT_REGS) = R24; \ + R15:14 = memd(R0 + #_PT_PREDSUSR); } \ + { R11:10 = memd(R0 + #_PT_M1M0); \ + R13:12 = memd(R0 + #_PT_LC1SA1); \ + p3:0 = R15; } \ + { R15:14 = memd(R0 + #_PT_LC0SA0); \ + R3:2 = memd(R0 + #_PT_R0302); \ + usr = R14; } \ + { R5:4 = memd(R0 + #_PT_R0504); \ + R7:6 = memd(R0 + #_PT_R0706); \ + C7:6 = R11:10; }\ + { R9:8 = memd(R0 + #_PT_R0908); \ + R11:10 = memd(R0 + #_PT_R1110); \ + C3:2 = R13:12; }\ + { R13:12 = memd(R0 + #_PT_R1312); \ + R15:14 = memd(R0 + #_PT_R1514); \ + C1:0 = R15:14; }\ + { R17:16 = memd(R0 + #_PT_R1716); \ + R19:18 = memd(R0 + #_PT_R1918); } \ + { R21:20 = memd(R0 + #_PT_R2120); \ + R23:22 = memd(R0 + #_PT_R2322); } \ + { R25:24 = memd(R0 + #_PT_R2524); \ + R27:26 = memd(R0 + #_PT_R2726); } \ + R31:30 = memd(R0 + #_PT_CS1CS0); \ + { C13:12 = R31:30; \ + R31:30 = memd(R0 + #_PT_GPUGP) ; \ + R28 = memw(R0 + #_PT_R2928); }\ + { C11:10 = R31:30; \ + R31:30 = memd(R0 + #_PT_R3130); } +#endif /* * Clears off enough space for the rest of pt_regs; evrec is a part @@ -139,6 +213,7 @@ * Need to save off R0, R1, R2, R3 immediately. */ +#if CONFIG_HEXAGON_ARCH_VERSION < 4 #define vm_event_entry(CHandler) \ { \ R29 = add(R29, #-(_PT_REGS_SIZE)); \ @@ -158,6 +233,34 @@ R1.H = #HI(CHandler); \ jump event_dispatch; \ } +#else +/* V4+ */ +/* turn on I$ prefetch early */ +/* the # ## # syntax inserts a literal ## */ +#define vm_event_entry(CHandler) \ + { \ + R29 = add(R29, #-(_PT_REGS_SIZE)); \ + memd(R29 + #(_PT_R0100 + -_PT_REGS_SIZE)) = R1:0; \ + memd(R29 + #(_PT_R0302 + -_PT_REGS_SIZE)) = R3:2; \ + R0 = usr; \ + } \ + { \ + memw(R29 + #_PT_PREDSUSR) = R0; \ + R0 = setbit(R0, #16); \ + } \ + usr = R0; \ + R1:0 = G1:0; \ + { \ + memd(R29 + #_PT_ER_VMEL) = R1:0; \ + R1 = # ## #(CHandler); \ + R3:2 = G3:2; \ + } \ + { \ + R0 = R29; \ + memd(R29 + #_PT_ER_VMPSP) = R3:2; \ + jump event_dispatch; \ + } +#endif .text /* @@ -171,6 +274,9 @@ event_dispatch: callr r1 /* + * Coming back from the C-world, our thread info pointer + * should be in the designated register (usually R19) + * * If we were in kernel mode, we don't need to check scheduler * or signals if CONFIG_PREEMPT is not set. If set, then it has * to jump to a need_resched kind of block. @@ -183,69 +289,68 @@ event_dispatch: #endif /* "Nested control path" -- if the previous mode was kernel */ - R0 = memw(R29 + #_PT_ER_VMEST); - P0 = tstbit(R0, #HVM_VMEST_UM_SFT); - if !P0 jump restore_all; - /* - * Returning from system call, normally coming back from user mode - */ -return_from_syscall: - /* Disable interrupts while checking TIF */ - R0 = #VM_INT_DISABLE - trap1(#HVM_TRAP1_VMSETIE) - - /* - * Coming back from the C-world, our thread info pointer - * should be in the designated register (usually R19) - */ - R1.L = #LO(_TIF_ALLWORK_MASK) { - R1.H = #HI(_TIF_ALLWORK_MASK); - R0 = memw(THREADINFO_REG + #_THREAD_INFO_FLAGS); + R0 = memw(R29 + #_PT_ER_VMEST); + R26.L = #LO(do_work_pending); + } + { + P0 = tstbit(R0, #HVM_VMEST_UM_SFT); + if (!P0.new) jump:nt restore_all; + R26.H = #HI(do_work_pending); + R0 = #VM_INT_DISABLE; } /* - * Compare against the "return to userspace" _TIF_WORK_MASK + * Check also the return from fork/system call, normally coming back from + * user mode + * + * R26 needs to have do_work_pending, and R0 should have VM_INT_DISABLE */ - R1 = and(R1,R0); - { P0 = cmp.eq(R1,#0); if (!P0.new) jump:t work_pending;} - jump restore_all; /* we're outta here! */ -work_pending: +check_work_pending: + /* Disable interrupts while checking TIF */ + trap1(#HVM_TRAP1_VMSETIE) { - P0 = tstbit(R1, #TIF_NEED_RESCHED); - if (!P0.new) jump:nt work_notifysig; + R0 = R29; /* regs should still be at top of stack */ + R1 = memw(THREADINFO_REG + #_THREAD_INFO_FLAGS); + callr R26; } - call schedule - jump return_from_syscall; /* check for more work */ -work_notifysig: - /* this is the part that's kind of fuzzy. */ - R1 = and(R0, #(_TIF_SIGPENDING | _TIF_NOTIFY_RESUME)); - P0 = cmp.eq(R1, #0); - if P0 jump restore_all - R1 = R0; /* unsigned long thread_info_flags */ - R0 = R29; /* regs should still be at top of stack */ - call do_notify_resume + { + P0 = cmp.eq(R0, #0); if (!P0.new) jump:nt check_work_pending; + R0 = #VM_INT_DISABLE; + } restore_all: - /* Disable interrupts, if they weren't already, before reg restore. */ - R0 = #VM_INT_DISABLE + /* + * Disable interrupts, if they weren't already, before reg restore. + * R0 gets preloaded with #VM_INT_DISABLE before we get here. + */ trap1(#HVM_TRAP1_VMSETIE) /* do the setregs here for VM 0.5 */ /* R29 here should already be pointing at pt_regs */ - R1:0 = memd(R29 + #_PT_ER_VMEL); - R3:2 = memd(R29 + #_PT_ER_VMPSP); + { + R1:0 = memd(R29 + #_PT_ER_VMEL); + R3:2 = memd(R29 + #_PT_ER_VMPSP); + } +#if CONFIG_HEXAGON_ARCH_VERSION < 4 trap1(#HVM_TRAP1_VMSETREGS); +#else + G1:0 = R1:0; + G3:2 = R3:2; +#endif R0 = R29 restore_pt_regs() - R1:0 = memd(R29 + #_PT_R0100); - R29 = add(R29, #_PT_REGS_SIZE); + { + R1:0 = memd(R29 + #_PT_R0100); + R29 = add(R29, #_PT_REGS_SIZE); + } trap1(#HVM_TRAP1_VMRTE) /* Notreached */ + .globl _K_enter_genex _K_enter_genex: vm_event_entry(do_genex) @@ -262,12 +367,27 @@ _K_enter_trap0: _K_enter_machcheck: vm_event_entry(do_machcheck) + .globl _K_enter_debug +_K_enter_debug: + vm_event_entry(do_debug_exception) .globl ret_from_fork ret_from_fork: - call schedule_tail - P0 = cmp.eq(R24, #0); - if P0 jump return_from_syscall - R0 = R25; - callr R24 - jump return_from_syscall + { + call schedule_tail + R26.H = #HI(do_work_pending); + } + { + P0 = cmp.eq(R24, #0); + R26.L = #LO(do_work_pending); + R0 = #VM_INT_DISABLE; + } + if P0 jump check_work_pending + { + R0 = R25; + callr R24 + } + { + jump check_work_pending + R0 = #VM_INT_DISABLE; + } diff --git a/arch/hexagon/kernel/vm_events.c b/arch/hexagon/kernel/vm_events.c index 9b5a4a295a6..741aaa917cd 100644 --- a/arch/hexagon/kernel/vm_events.c +++ b/arch/hexagon/kernel/vm_events.c @@ -1,7 +1,7 @@ /* * Mostly IRQ support for Hexagon * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -33,6 +33,8 @@ */ void show_regs(struct pt_regs *regs) { + show_regs_print_info(KERN_EMERG); + printk(KERN_EMERG "restart_r0: \t0x%08lx syscall_nr: %ld\n", regs->restart_r0, regs->syscall_nr); printk(KERN_EMERG "preds: \t\t0x%08lx\n", regs->preds); @@ -42,6 +44,8 @@ void show_regs(struct pt_regs *regs) regs->lc1, regs->sa1, regs->m1); printk(KERN_EMERG "gp: \t0x%08lx ugp: 0x%08lx usr: 0x%08lx\n", regs->gp, regs->ugp, regs->usr); + printk(KERN_EMERG "cs0: \t0x%08lx cs1: 0x%08lx\n", + regs->cs0, regs->cs1); printk(KERN_EMERG "r0: \t0x%08lx %08lx %08lx %08lx\n", regs->r00, regs->r01, regs->r02, diff --git a/arch/hexagon/kernel/vm_vectors.S b/arch/hexagon/kernel/vm_vectors.S index 620f42cc582..791a7422dde 100644 --- a/arch/hexagon/kernel/vm_vectors.S +++ b/arch/hexagon/kernel/vm_vectors.S @@ -1,7 +1,7 @@ /* * Event jump tables * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2012,2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -41,7 +41,7 @@ _K_VM_event_vector: jump 1b; /* Reset */ jump _K_enter_machcheck; jump _K_enter_genex; - jump 1b; /* 3 Rsvd */ + jump _K_enter_debug; jump 1b; /* 4 Rsvd */ jump _K_enter_trap0; jump 1b; /* 6 Rsvd */ diff --git a/arch/hexagon/kernel/vmlinux.lds.S b/arch/hexagon/kernel/vmlinux.lds.S index 14e793f6abb..44d8c47bae2 100644 --- a/arch/hexagon/kernel/vmlinux.lds.S +++ b/arch/hexagon/kernel/vmlinux.lds.S @@ -1,7 +1,7 @@ /* * Linker script for Hexagon kernel * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -18,8 +18,6 @@ * 02110-1301, USA. */ -#define LOAD_OFFSET PAGE_OFFSET - #include <asm-generic/vmlinux.lds.h> #include <asm/asm-offsets.h> /* Most of the kernel defines are here */ #include <asm/mem-layout.h> /* except for page_offset */ @@ -36,13 +34,9 @@ See asm-generic/sections.h for seemingly required labels. #define PAGE_SIZE _PAGE_SIZE -/* This LOAD_OFFSET is temporary for debugging on the simulator; it may change - for hypervisor pseudo-physical memory. */ - - SECTIONS { - . = PAGE_OFFSET + LOAD_ADDRESS; + . = PAGE_OFFSET; __init_begin = .; HEAD_TEXT_SECTION @@ -52,7 +46,7 @@ SECTIONS . = ALIGN(_PAGE_SIZE); _stext = .; - .text : AT(ADDR(.text) - LOAD_OFFSET) { + .text : AT(ADDR(.text)) { _text = .; TEXT_TEXT SCHED_TEXT diff --git a/arch/hexagon/mm/init.c b/arch/hexagon/mm/init.c index 69ffcfd2879..88977e42af0 100644 --- a/arch/hexagon/mm/init.c +++ b/arch/hexagon/mm/init.c @@ -1,7 +1,7 @@ /* * Memory subsystem initialization for Hexagon * - * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and @@ -31,9 +31,10 @@ * Define a startpg just past the end of the kernel image and a lastpg * that corresponds to the end of real or simulated platform memory. */ -#define bootmem_startpg (PFN_UP(((unsigned long) _end) - PAGE_OFFSET)) +#define bootmem_startpg (PFN_UP(((unsigned long) _end) - PAGE_OFFSET + PHYS_OFFSET)) -unsigned long bootmem_lastpg; /* Should be set by platform code */ +unsigned long bootmem_lastpg; /* Should be set by platform code */ +unsigned long __phys_offset; /* physical kernel offset >> 12 */ /* Set as variable to limit PMD copies */ int max_kernel_seg = 0x303; @@ -44,7 +45,6 @@ unsigned long zero_page_mask; /* indicate pfn's of high memory */ unsigned long highstart_pfn, highend_pfn; -/* struct mmu_gather defined in asm-generic.h; */ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); /* Default cache attribute for newly created page tables */ @@ -70,10 +70,8 @@ unsigned long long kmap_generation; void __init mem_init(void) { /* No idea where this is actually declared. Seems to evade LXR. */ - totalram_pages += free_all_bootmem(); - num_physpages = bootmem_lastpg; /* seriously, what? */ - - printk(KERN_INFO "totalram_pages = %ld\n", totalram_pages); + free_all_bootmem(); + mem_init_print_info(NULL); /* * To-Do: someone somewhere should wipe out the bootmem map @@ -193,6 +191,9 @@ void __init setup_arch_memory(void) * This needs to change for highmem setups. */ + /* Prior to this, bootmem_lastpg is actually mem size */ + bootmem_lastpg += ARCH_PFN_OFFSET; + /* Memory size needs to be a multiple of 16M */ bootmem_lastpg = PFN_DOWN((bootmem_lastpg << PAGE_SHIFT) & ~((BIG_KERNEL_PAGE_SIZE) - 1)); @@ -201,12 +202,15 @@ void __init setup_arch_memory(void) * Reserve the top DMA_RESERVE bytes of RAM for DMA (uncached) * memory allocation */ - bootmap_size = init_bootmem(bootmem_startpg, bootmem_lastpg - - PFN_DOWN(DMA_RESERVED_BYTES)); + + max_low_pfn = bootmem_lastpg - PFN_DOWN(DMA_RESERVED_BYTES); + min_low_pfn = ARCH_PFN_OFFSET; + bootmap_size = init_bootmem_node(NODE_DATA(0), bootmem_startpg, min_low_pfn, max_low_pfn); printk(KERN_INFO "bootmem_startpg: 0x%08lx\n", bootmem_startpg); printk(KERN_INFO "bootmem_lastpg: 0x%08lx\n", bootmem_lastpg); printk(KERN_INFO "bootmap_size: %d\n", bootmap_size); + printk(KERN_INFO "min_low_pfn: 0x%08lx\n", min_low_pfn); printk(KERN_INFO "max_low_pfn: 0x%08lx\n", max_low_pfn); /* @@ -221,14 +225,17 @@ void __init setup_arch_memory(void) /* this actually only goes to the end of the first gig */ segtable_end = segtable + (1<<(30-22)); - /* Move forward to the start of empty pages */ - segtable += bootmem_lastpg >> (22-PAGE_SHIFT); + /* + * Move forward to the start of empty pages; take into account + * phys_offset shift. + */ + segtable += (bootmem_lastpg-ARCH_PFN_OFFSET)>>(22-PAGE_SHIFT); { - int i; + int i; - for (i = 1 ; i <= DMA_RESERVE ; i++) - segtable[-i] = ((segtable[-i] & __HVM_PTE_PGMASK_4MB) + for (i = 1 ; i <= DMA_RESERVE ; i++) + segtable[-i] = ((segtable[-i] & __HVM_PTE_PGMASK_4MB) | __HVM_PTE_R | __HVM_PTE_W | __HVM_PTE_X | __HEXAGON_C_UNC << 6 | __HVM_PDE_S_4MB); @@ -256,7 +263,7 @@ void __init setup_arch_memory(void) * Free all the memory that wasn't taken up by the bootmap, the DMA * reserve, or kernel itself. */ - free_bootmem(PFN_PHYS(bootmem_startpg)+bootmap_size, + free_bootmem(PFN_PHYS(bootmem_startpg) + bootmap_size, PFN_PHYS(bootmem_lastpg - bootmem_startpg) - bootmap_size - DMA_RESERVED_BYTES); diff --git a/arch/hexagon/mm/vm_fault.c b/arch/hexagon/mm/vm_fault.c index 308ef0ce648..8704c932003 100644 --- a/arch/hexagon/mm/vm_fault.c +++ b/arch/hexagon/mm/vm_fault.c @@ -53,8 +53,7 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs) int si_code = SEGV_MAPERR; int fault; const struct exception_table_entry *fixup; - unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE | - (cause > 0 ? FAULT_FLAG_WRITE : 0); + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; /* * If we're in an interrupt or have no user context, @@ -65,6 +64,8 @@ void do_page_fault(unsigned long address, long cause, struct pt_regs *regs) local_irq_enable(); + if (user_mode(regs)) + flags |= FAULT_FLAG_USER; retry: down_read(&mm->mmap_sem); vma = find_vma(mm, address); @@ -96,6 +97,7 @@ good_area: case FLT_STORE: if (!(vma->vm_flags & VM_WRITE)) goto bad_area; + flags |= FAULT_FLAG_WRITE; break; } @@ -147,7 +149,7 @@ good_area: } info.si_errno = 0; info.si_addr = (void __user *)address; - force_sig_info(info.si_code, &info, current); + force_sig_info(info.si_signo, &info, current); return; bad_area: @@ -158,7 +160,7 @@ bad_area: info.si_errno = 0; info.si_code = si_code; info.si_addr = (void *)address; - force_sig_info(SIGSEGV, &info, current); + force_sig_info(info.si_signo, &info, current); return; } /* Kernel-mode fault falls through */ |