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Diffstat (limited to 'include/asm-parisc/io.h')
| -rw-r--r-- | include/asm-parisc/io.h | 418 |
1 files changed, 418 insertions, 0 deletions
diff --git a/include/asm-parisc/io.h b/include/asm-parisc/io.h new file mode 100644 index 00000000000..b9bb5946ecc --- /dev/null +++ b/include/asm-parisc/io.h @@ -0,0 +1,418 @@ +#ifndef _ASM_IO_H +#define _ASM_IO_H + +#include <linux/config.h> +#include <linux/types.h> +#include <asm/pgtable.h> + +extern unsigned long parisc_vmerge_boundary; +extern unsigned long parisc_vmerge_max_size; + +#define BIO_VMERGE_BOUNDARY parisc_vmerge_boundary +#define BIO_VMERGE_MAX_SIZE parisc_vmerge_max_size + +#define virt_to_phys(a) ((unsigned long)__pa(a)) +#define phys_to_virt(a) __va(a) +#define virt_to_bus virt_to_phys +#define bus_to_virt phys_to_virt + +/* + * Memory mapped I/O + * + * readX()/writeX() do byteswapping and take an ioremapped address + * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. + * gsc_*() don't byteswap and operate on physical addresses; + * eg dev->hpa or 0xfee00000. + */ + +#ifdef CONFIG_DEBUG_IOREMAP +#ifdef CONFIG_64BIT +#define NYBBLE_SHIFT 60 +#else +#define NYBBLE_SHIFT 28 +#endif +extern void gsc_bad_addr(unsigned long addr); +extern void __raw_bad_addr(const volatile void __iomem *addr); +#define gsc_check_addr(addr) \ + if ((addr >> NYBBLE_SHIFT) != 0xf) { \ + gsc_bad_addr(addr); \ + addr |= 0xfUL << NYBBLE_SHIFT; \ + } +#define __raw_check_addr(addr) \ + if (((unsigned long)addr >> NYBBLE_SHIFT) != 0xe) \ + __raw_bad_addr(addr); \ + addr = (void *)((unsigned long)addr | (0xfUL << NYBBLE_SHIFT)); +#else +#define gsc_check_addr(addr) +#define __raw_check_addr(addr) +#endif + +static inline unsigned char gsc_readb(unsigned long addr) +{ + long flags; + unsigned char ret; + + gsc_check_addr(addr); + + __asm__ __volatile__( + " rsm 2,%0\n" + " ldbx 0(%2),%1\n" + " mtsm %0\n" + : "=&r" (flags), "=r" (ret) : "r" (addr) ); + + return ret; +} + +static inline unsigned short gsc_readw(unsigned long addr) +{ + long flags; + unsigned short ret; + + gsc_check_addr(addr); + + __asm__ __volatile__( + " rsm 2,%0\n" + " ldhx 0(%2),%1\n" + " mtsm %0\n" + : "=&r" (flags), "=r" (ret) : "r" (addr) ); + + return ret; +} + +static inline unsigned int gsc_readl(unsigned long addr) +{ + u32 ret; + + gsc_check_addr(addr); + + __asm__ __volatile__( + " ldwax 0(%1),%0\n" + : "=r" (ret) : "r" (addr) ); + + return ret; +} + +static inline unsigned long long gsc_readq(unsigned long addr) +{ + unsigned long long ret; + gsc_check_addr(addr); + +#ifdef __LP64__ + __asm__ __volatile__( + " ldda 0(%1),%0\n" + : "=r" (ret) : "r" (addr) ); +#else + /* two reads may have side effects.. */ + ret = ((u64) gsc_readl(addr)) << 32; + ret |= gsc_readl(addr+4); +#endif + return ret; +} + +static inline void gsc_writeb(unsigned char val, unsigned long addr) +{ + long flags; + gsc_check_addr(addr); + + __asm__ __volatile__( + " rsm 2,%0\n" + " stbs %1,0(%2)\n" + " mtsm %0\n" + : "=&r" (flags) : "r" (val), "r" (addr) ); +} + +static inline void gsc_writew(unsigned short val, unsigned long addr) +{ + long flags; + gsc_check_addr(addr); + + __asm__ __volatile__( + " rsm 2,%0\n" + " sths %1,0(%2)\n" + " mtsm %0\n" + : "=&r" (flags) : "r" (val), "r" (addr) ); +} + +static inline void gsc_writel(unsigned int val, unsigned long addr) +{ + gsc_check_addr(addr); + + __asm__ __volatile__( + " stwas %0,0(%1)\n" + : : "r" (val), "r" (addr) ); +} + +static inline void gsc_writeq(unsigned long long val, unsigned long addr) +{ + gsc_check_addr(addr); + +#ifdef __LP64__ + __asm__ __volatile__( + " stda %0,0(%1)\n" + : : "r" (val), "r" (addr) ); +#else + /* two writes may have side effects.. */ + gsc_writel(val >> 32, addr); + gsc_writel(val, addr+4); +#endif +} + +/* + * The standard PCI ioremap interfaces + */ + +extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); + +extern inline void __iomem * ioremap(unsigned long offset, unsigned long size) +{ + return __ioremap(offset, size, 0); +} + +/* + * This one maps high address device memory and turns off caching for that area. + * it's useful if some control registers are in such an area and write combining + * or read caching is not desirable: + */ +extern inline void * ioremap_nocache(unsigned long offset, unsigned long size) +{ + return __ioremap(offset, size, _PAGE_NO_CACHE /* _PAGE_PCD */); +} + +extern void iounmap(void __iomem *addr); + +/* + * USE_HPPA_IOREMAP is the magic flag to enable or disable real ioremap() + * functionality. It's currently disabled because it may not work on some + * machines. + */ +#define USE_HPPA_IOREMAP 0 + +#if USE_HPPA_IOREMAP +static inline unsigned char __raw_readb(const volatile void __iomem *addr) +{ + return (*(volatile unsigned char __force *) (addr)); +} +static inline unsigned short __raw_readw(const volatile void __iomem *addr) +{ + return *(volatile unsigned short __force *) addr; +} +static inline unsigned int __raw_readl(const volatile void __iomem *addr) +{ + return *(volatile unsigned int __force *) addr; +} +static inline unsigned long long __raw_readq(const volatile void __iomem *addr) +{ + return *(volatile unsigned long long __force *) addr; +} + +static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr) +{ + *(volatile unsigned char __force *) addr = b; +} +static inline void __raw_writew(unsigned short b, volatile void __iomem *addr) +{ + *(volatile unsigned short __force *) addr = b; +} +static inline void __raw_writel(unsigned int b, volatile void __iomem *addr) +{ + *(volatile unsigned int __force *) addr = b; +} +static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr) +{ + *(volatile unsigned long long __force *) addr = b; +} +#else /* !USE_HPPA_IOREMAP */ +static inline unsigned char __raw_readb(const volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + return gsc_readb((unsigned long) addr); +} +static inline unsigned short __raw_readw(const volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + return gsc_readw((unsigned long) addr); +} +static inline unsigned int __raw_readl(const volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + return gsc_readl((unsigned long) addr); +} +static inline unsigned long long __raw_readq(const volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + return gsc_readq((unsigned long) addr); +} + +static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + gsc_writeb(b, (unsigned long) addr); +} +static inline void __raw_writew(unsigned short b, volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + gsc_writew(b, (unsigned long) addr); +} +static inline void __raw_writel(unsigned int b, volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + gsc_writel(b, (unsigned long) addr); +} +static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr) +{ + __raw_check_addr(addr); + + gsc_writeq(b, (unsigned long) addr); +} +#endif /* !USE_HPPA_IOREMAP */ + +/* readb can never be const, so use __fswab instead of le*_to_cpu */ +#define readb(addr) __raw_readb(addr) +#define readw(addr) __fswab16(__raw_readw(addr)) +#define readl(addr) __fswab32(__raw_readl(addr)) +#define readq(addr) __fswab64(__raw_readq(addr)) +#define writeb(b, addr) __raw_writeb(b, addr) +#define writew(b, addr) __raw_writew(cpu_to_le16(b), addr) +#define writel(b, addr) __raw_writel(cpu_to_le32(b), addr) +#define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr) + +#define readb_relaxed(addr) readb(addr) +#define readw_relaxed(addr) readw(addr) +#define readl_relaxed(addr) readl(addr) +#define readq_relaxed(addr) readq(addr) + +#define mmiowb() do { } while (0) + +void memset_io(volatile void __iomem *addr, unsigned char val, int count); +void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); +void memcpy_toio(volatile void __iomem *dst, const void *src, int count); + +/* Support old drivers which don't ioremap. + * NB this interface is scheduled to disappear in 2.5 + */ + +#define __isa_addr(x) (void __iomem *)(F_EXTEND(0xfc000000) | (x)) +#define isa_readb(a) readb(__isa_addr(a)) +#define isa_readw(a) readw(__isa_addr(a)) +#define isa_readl(a) readl(__isa_addr(a)) +#define isa_writeb(b,a) writeb((b), __isa_addr(a)) +#define isa_writew(b,a) writew((b), __isa_addr(a)) +#define isa_writel(b,a) writel((b), __isa_addr(a)) +#define isa_memset_io(a,b,c) memset_io(__isa_addr(a), (b), (c)) +#define isa_memcpy_fromio(a,b,c) memcpy_fromio((a), __isa_addr(b), (c)) +#define isa_memcpy_toio(a,b,c) memcpy_toio(__isa_addr(a), (b), (c)) + + +/* + * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and + * just copy it. The net code will then do the checksum later. Presently + * only used by some shared memory 8390 Ethernet cards anyway. + */ + +#define eth_io_copy_and_sum(skb,src,len,unused) \ + memcpy_fromio((skb)->data,(src),(len)) +#define isa_eth_io_copy_and_sum(skb,src,len,unused) \ + isa_memcpy_fromio((skb)->data,(src),(len)) + +/* Port-space IO */ + +#define inb_p inb +#define inw_p inw +#define inl_p inl +#define outb_p outb +#define outw_p outw +#define outl_p outl + +extern unsigned char eisa_in8(unsigned short port); +extern unsigned short eisa_in16(unsigned short port); +extern unsigned int eisa_in32(unsigned short port); +extern void eisa_out8(unsigned char data, unsigned short port); +extern void eisa_out16(unsigned short data, unsigned short port); +extern void eisa_out32(unsigned int data, unsigned short port); + +#if defined(CONFIG_PCI) +extern unsigned char inb(int addr); +extern unsigned short inw(int addr); +extern unsigned int inl(int addr); + +extern void outb(unsigned char b, int addr); +extern void outw(unsigned short b, int addr); +extern void outl(unsigned int b, int addr); +#elif defined(CONFIG_EISA) +#define inb eisa_in8 +#define inw eisa_in16 +#define inl eisa_in32 +#define outb eisa_out8 +#define outw eisa_out16 +#define outl eisa_out32 +#else +static inline char inb(unsigned long addr) +{ + BUG(); + return -1; +} + +static inline short inw(unsigned long addr) +{ + BUG(); + return -1; +} + +static inline int inl(unsigned long addr) +{ + BUG(); + return -1; +} + +#define outb(x, y) BUG() +#define outw(x, y) BUG() +#define outl(x, y) BUG() +#endif + +/* + * String versions of in/out ops: + */ +extern void insb (unsigned long port, void *dst, unsigned long count); +extern void insw (unsigned long port, void *dst, unsigned long count); +extern void insl (unsigned long port, void *dst, unsigned long count); +extern void outsb (unsigned long port, const void *src, unsigned long count); +extern void outsw (unsigned long port, const void *src, unsigned long count); +extern void outsl (unsigned long port, const void *src, unsigned long count); + + +/* IO Port space is : BBiiii where BB is HBA number. */ +#define IO_SPACE_LIMIT 0x00ffffff + + +#define dma_cache_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) +#define dma_cache_wback(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) +#define dma_cache_wback_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) + +/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 + * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit + * mode (essentially just sign extending. This macro takes in a 32 + * bit I/O address (still with the leading f) and outputs the correct + * value for either 32 or 64 bit mode */ +#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) + +#include <asm-generic/iomap.h> + +/* + * Convert a physical pointer to a virtual kernel pointer for /dev/mem + * access + */ +#define xlate_dev_mem_ptr(p) __va(p) + +/* + * Convert a virtual cached pointer to an uncached pointer + */ +#define xlate_dev_kmem_ptr(p) p + +#endif |