diff options
Diffstat (limited to 'arch/mips/include/asm/io.h')
| -rw-r--r-- | arch/mips/include/asm/io.h | 82 |
1 files changed, 63 insertions, 19 deletions
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h index 501a40b9f18..933b50e125a 100644 --- a/arch/mips/include/asm/io.h +++ b/arch/mips/include/asm/io.h @@ -7,7 +7,7 @@ * Copyright (C) 1994 - 2000, 06 Ralf Baechle * Copyright (C) 1999, 2000 Silicon Graphics, Inc. * Copyright (C) 2004, 2005 MIPS Technologies, Inc. All rights reserved. - * Author: Maciej W. Rozycki <macro@mips.com> + * Author: Maciej W. Rozycki <macro@mips.com> */ #ifndef _ASM_IO_H #define _ASM_IO_H @@ -15,8 +15,10 @@ #include <linux/compiler.h> #include <linux/kernel.h> #include <linux/types.h> +#include <linux/irqflags.h> #include <asm/addrspace.h> +#include <asm/bug.h> #include <asm/byteorder.h> #include <asm/cpu.h> #include <asm/cpu-features.h> @@ -116,7 +118,7 @@ static inline void set_io_port_base(unsigned long base) */ static inline unsigned long virt_to_phys(volatile const void *address) { - return (unsigned long)address - PAGE_OFFSET + PHYS_OFFSET; + return __pa(address); } /* @@ -168,6 +170,11 @@ static inline void * isa_bus_to_virt(unsigned long address) extern void __iomem * __ioremap(phys_t offset, phys_t size, unsigned long flags); extern void __iounmap(const volatile void __iomem *addr); +#ifndef CONFIG_PCI +struct pci_dev; +static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr) {} +#endif + static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size, unsigned long flags) { @@ -242,7 +249,7 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size, * This version of ioremap ensures that the memory is marked uncachable * on the CPU as well as honouring existing caching rules from things like * the PCI bus. Note that there are other caches and buffers on many - * busses. In paticular driver authors should read up on PCI writes + * busses. In particular driver authors should read up on PCI writes * * It's useful if some control registers are in such an area and * write combining or read caching is not desirable: @@ -251,9 +258,9 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size, __ioremap_mode((offset), (size), _CACHE_UNCACHED) /* - * ioremap_cachable - map bus memory into CPU space - * @offset: bus address of the memory - * @size: size of the resource to map + * ioremap_cachable - map bus memory into CPU space + * @offset: bus address of the memory + * @size: size of the resource to map * * ioremap_nocache performs a platform specific sequence of operations to * make bus memory CPU accessible via the readb/readw/readl/writeb/ @@ -262,14 +269,14 @@ static inline void __iomem * __ioremap_mode(phys_t offset, unsigned long size, * address. * * This version of ioremap ensures that the memory is marked cachable by - * the CPU. Also enables full write-combining. Useful for some + * the CPU. Also enables full write-combining. Useful for some * memory-like regions on I/O busses. */ #define ioremap_cachable(offset, size) \ __ioremap_mode((offset), (size), _page_cachable_default) /* - * These two are MIPS specific ioremap variant. ioremap_cacheable_cow + * These two are MIPS specific ioremap variant. ioremap_cacheable_cow * requests a cachable mapping, ioremap_uncached_accelerated requests a * mapping using the uncached accelerated mode which isn't supported on * all processors. @@ -295,6 +302,12 @@ static inline void iounmap(const volatile void __iomem *addr) #undef __IS_KSEG1 } +#ifdef CONFIG_CPU_CAVIUM_OCTEON +#define war_octeon_io_reorder_wmb() wmb() +#else +#define war_octeon_io_reorder_wmb() do { } while (0) +#endif + #define __BUILD_MEMORY_SINGLE(pfx, bwlq, type, irq) \ \ static inline void pfx##write##bwlq(type val, \ @@ -303,11 +316,13 @@ static inline void pfx##write##bwlq(type val, \ volatile type *__mem; \ type __val; \ \ + war_octeon_io_reorder_wmb(); \ + \ __mem = (void *)__swizzle_addr_##bwlq((unsigned long)(mem)); \ \ __val = pfx##ioswab##bwlq(__mem, val); \ \ - if (sizeof(type) != sizeof(u64) || sizeof(u64) == sizeof(long)) \ + if (sizeof(type) != sizeof(u64) || sizeof(u64) == sizeof(long)) \ *__mem = __val; \ else if (cpu_has_64bits) { \ unsigned long __flags; \ @@ -316,10 +331,10 @@ static inline void pfx##write##bwlq(type val, \ if (irq) \ local_irq_save(__flags); \ __asm__ __volatile__( \ - ".set mips3" "\t\t# __writeq""\n\t" \ - "dsll32 %L0, %L0, 0" "\n\t" \ - "dsrl32 %L0, %L0, 0" "\n\t" \ - "dsll32 %M0, %M0, 0" "\n\t" \ + ".set arch=r4000" "\t\t# __writeq""\n\t" \ + "dsll32 %L0, %L0, 0" "\n\t" \ + "dsrl32 %L0, %L0, 0" "\n\t" \ + "dsll32 %M0, %M0, 0" "\n\t" \ "or %L0, %L0, %M0" "\n\t" \ "sd %L0, %2" "\n\t" \ ".set mips0" "\n" \ @@ -338,7 +353,7 @@ static inline type pfx##read##bwlq(const volatile void __iomem *mem) \ \ __mem = (void *)__swizzle_addr_##bwlq((unsigned long)(mem)); \ \ - if (sizeof(type) != sizeof(u64) || sizeof(u64) == sizeof(long)) \ + if (sizeof(type) != sizeof(u64) || sizeof(u64) == sizeof(long)) \ __val = *__mem; \ else if (cpu_has_64bits) { \ unsigned long __flags; \ @@ -346,9 +361,9 @@ static inline type pfx##read##bwlq(const volatile void __iomem *mem) \ if (irq) \ local_irq_save(__flags); \ __asm__ __volatile__( \ - ".set mips3" "\t\t# __readq" "\n\t" \ + ".set arch=r4000" "\t\t# __readq" "\n\t" \ "ld %L0, %1" "\n\t" \ - "dsra32 %M0, %L0, 0" "\n\t" \ + "dsra32 %M0, %L0, 0" "\n\t" \ "sll %L0, %L0, 0" "\n\t" \ ".set mips0" "\n" \ : "=r" (__val) \ @@ -370,6 +385,8 @@ static inline void pfx##out##bwlq##p(type val, unsigned long port) \ volatile type *__addr; \ type __val; \ \ + war_octeon_io_reorder_wmb(); \ + \ __addr = (void *)__swizzle_addr_##bwlq(mips_io_port_base + port); \ \ __val = pfx##ioswab##bwlq(__addr, val); \ @@ -437,6 +454,29 @@ __BUILDIO(q, u64) #define readl_relaxed readl #define readq_relaxed readq +#define writeb_relaxed writeb +#define writew_relaxed writew +#define writel_relaxed writel +#define writeq_relaxed writeq + +#define readb_be(addr) \ + __raw_readb((__force unsigned *)(addr)) +#define readw_be(addr) \ + be16_to_cpu(__raw_readw((__force unsigned *)(addr))) +#define readl_be(addr) \ + be32_to_cpu(__raw_readl((__force unsigned *)(addr))) +#define readq_be(addr) \ + be64_to_cpu(__raw_readq((__force unsigned *)(addr))) + +#define writeb_be(val, addr) \ + __raw_writeb((val), (__force unsigned *)(addr)) +#define writew_be(val, addr) \ + __raw_writew(cpu_to_be16((val)), (__force unsigned *)(addr)) +#define writel_be(val, addr) \ + __raw_writel(cpu_to_be32((val)), (__force unsigned *)(addr)) +#define writeq_be(val, addr) \ + __raw_writeq(cpu_to_be64((val)), (__force unsigned *)(addr)) + /* * Some code tests for these symbols */ @@ -504,8 +544,12 @@ BUILDSTRING(q, u64) #endif +#ifdef CONFIG_CPU_CAVIUM_OCTEON +#define mmiowb() wmb() +#else /* Depends on MIPS II instruction set */ #define mmiowb() asm volatile ("sync" ::: "memory") +#endif static inline void memset_io(volatile void __iomem *addr, unsigned char val, int count) { @@ -540,7 +584,7 @@ static inline void memcpy_toio(volatile void __iomem *dst, const void *src, int * * This API used to be exported; it now is for arch code internal use only. */ -#ifdef CONFIG_DMA_NONCOHERENT +#if defined(CONFIG_DMA_NONCOHERENT) || defined(CONFIG_DMA_MAYBE_COHERENT) extern void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size); extern void (*_dma_cache_wback)(unsigned long start, unsigned long size); @@ -552,14 +596,14 @@ extern void (*_dma_cache_inv)(unsigned long start, unsigned long size); #else /* Sane hardware */ -#define dma_cache_wback_inv(start,size) \ +#define dma_cache_wback_inv(start,size) \ do { (void) (start); (void) (size); } while (0) #define dma_cache_wback(start,size) \ do { (void) (start); (void) (size); } while (0) #define dma_cache_inv(start,size) \ do { (void) (start); (void) (size); } while (0) -#endif /* CONFIG_DMA_NONCOHERENT */ +#endif /* CONFIG_DMA_NONCOHERENT || CONFIG_DMA_MAYBE_COHERENT */ /* * Read a 32-bit register that requires a 64-bit read cycle on the bus. |