#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