1#ifndef _ASM_IO_H 2#define _ASM_IO_H 3 4#include <linux/types.h> 5#include <asm/pgtable.h> 6 7extern unsigned long parisc_vmerge_boundary; 8extern unsigned long parisc_vmerge_max_size; 9 10#define BIO_VMERGE_BOUNDARY parisc_vmerge_boundary 11#define BIO_VMERGE_MAX_SIZE parisc_vmerge_max_size 12 13#define virt_to_phys(a) ((unsigned long)__pa(a)) 14#define phys_to_virt(a) __va(a) 15#define virt_to_bus virt_to_phys 16#define bus_to_virt phys_to_virt 17 18/* 19 * Memory mapped I/O 20 * 21 * readX()/writeX() do byteswapping and take an ioremapped address 22 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. 23 * gsc_*() don't byteswap and operate on physical addresses; 24 * eg dev->hpa or 0xfee00000. 25 */ 26 27static inline unsigned char gsc_readb(unsigned long addr) 28{ 29 long flags; 30 unsigned char ret; 31 32 __asm__ __volatile__( 33 " rsm 2,%0\n" 34 " ldbx 0(%2),%1\n" 35 " mtsm %0\n" 36 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 37 38 return ret; 39} 40 41static inline unsigned short gsc_readw(unsigned long addr) 42{ 43 long flags; 44 unsigned short ret; 45 46 __asm__ __volatile__( 47 " rsm 2,%0\n" 48 " ldhx 0(%2),%1\n" 49 " mtsm %0\n" 50 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 51 52 return ret; 53} 54 55static inline unsigned int gsc_readl(unsigned long addr) 56{ 57 u32 ret; 58 59 __asm__ __volatile__( 60 " ldwax 0(%1),%0\n" 61 : "=r" (ret) : "r" (addr) ); 62 63 return ret; 64} 65 66static inline unsigned long long gsc_readq(unsigned long addr) 67{ 68 unsigned long long ret; 69 70#ifdef CONFIG_64BIT 71 __asm__ __volatile__( 72 " ldda 0(%1),%0\n" 73 : "=r" (ret) : "r" (addr) ); 74#else 75 /* two reads may have side effects.. */ 76 ret = ((u64) gsc_readl(addr)) << 32; 77 ret |= gsc_readl(addr+4); 78#endif 79 return ret; 80} 81 82static inline void gsc_writeb(unsigned char val, unsigned long addr) 83{ 84 long flags; 85 __asm__ __volatile__( 86 " rsm 2,%0\n" 87 " stbs %1,0(%2)\n" 88 " mtsm %0\n" 89 : "=&r" (flags) : "r" (val), "r" (addr) ); 90} 91 92static inline void gsc_writew(unsigned short val, unsigned long addr) 93{ 94 long flags; 95 __asm__ __volatile__( 96 " rsm 2,%0\n" 97 " sths %1,0(%2)\n" 98 " mtsm %0\n" 99 : "=&r" (flags) : "r" (val), "r" (addr) ); 100} 101 102static inline void gsc_writel(unsigned int val, unsigned long addr) 103{ 104 __asm__ __volatile__( 105 " stwas %0,0(%1)\n" 106 : : "r" (val), "r" (addr) ); 107} 108 109static inline void gsc_writeq(unsigned long long val, unsigned long addr) 110{ 111#ifdef CONFIG_64BIT 112 __asm__ __volatile__( 113 " stda %0,0(%1)\n" 114 : : "r" (val), "r" (addr) ); 115#else 116 /* two writes may have side effects.. */ 117 gsc_writel(val >> 32, addr); 118 gsc_writel(val, addr+4); 119#endif 120} 121 122/* 123 * The standard PCI ioremap interfaces 124 */ 125 126extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); 127 128/* Most machines react poorly to I/O-space being cacheable... Instead let's 129 * define ioremap() in terms of ioremap_nocache(). 130 */ 131extern inline void __iomem * ioremap(unsigned long offset, unsigned long size) 132{ 133 return __ioremap(offset, size, _PAGE_NO_CACHE); 134} 135#define ioremap_nocache(off, sz) ioremap((off), (sz)) 136 137extern void iounmap(const volatile void __iomem *addr); 138 139static inline unsigned char __raw_readb(const volatile void __iomem *addr) 140{ 141 return (*(volatile unsigned char __force *) (addr)); 142} 143static inline unsigned short __raw_readw(const volatile void __iomem *addr) 144{ 145 return *(volatile unsigned short __force *) addr; 146} 147static inline unsigned int __raw_readl(const volatile void __iomem *addr) 148{ 149 return *(volatile unsigned int __force *) addr; 150} 151static inline unsigned long long __raw_readq(const volatile void __iomem *addr) 152{ 153 return *(volatile unsigned long long __force *) addr; 154} 155 156static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr) 157{ 158 *(volatile unsigned char __force *) addr = b; 159} 160static inline void __raw_writew(unsigned short b, volatile void __iomem *addr) 161{ 162 *(volatile unsigned short __force *) addr = b; 163} 164static inline void __raw_writel(unsigned int b, volatile void __iomem *addr) 165{ 166 *(volatile unsigned int __force *) addr = b; 167} 168static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr) 169{ 170 *(volatile unsigned long long __force *) addr = b; 171} 172 173/* readb can never be const, so use __fswab instead of le*_to_cpu */ 174#define readb(addr) __raw_readb(addr) 175#define readw(addr) __fswab16(__raw_readw(addr)) 176#define readl(addr) __fswab32(__raw_readl(addr)) 177#define readq(addr) __fswab64(__raw_readq(addr)) 178#define writeb(b, addr) __raw_writeb(b, addr) 179#define writew(b, addr) __raw_writew(cpu_to_le16(b), addr) 180#define writel(b, addr) __raw_writel(cpu_to_le32(b), addr) 181#define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr) 182 183#define readb_relaxed(addr) readb(addr) 184#define readw_relaxed(addr) readw(addr) 185#define readl_relaxed(addr) readl(addr) 186#define readq_relaxed(addr) readq(addr) 187 188#define mmiowb() do { } while (0) 189 190void memset_io(volatile void __iomem *addr, unsigned char val, int count); 191void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); 192void memcpy_toio(volatile void __iomem *dst, const void *src, int count); 193 194/* Port-space IO */ 195 196#define inb_p inb 197#define inw_p inw 198#define inl_p inl 199#define outb_p outb 200#define outw_p outw 201#define outl_p outl 202 203extern unsigned char eisa_in8(unsigned short port); 204extern unsigned short eisa_in16(unsigned short port); 205extern unsigned int eisa_in32(unsigned short port); 206extern void eisa_out8(unsigned char data, unsigned short port); 207extern void eisa_out16(unsigned short data, unsigned short port); 208extern void eisa_out32(unsigned int data, unsigned short port); 209 210#if defined(CONFIG_PCI) 211extern unsigned char inb(int addr); 212extern unsigned short inw(int addr); 213extern unsigned int inl(int addr); 214 215extern void outb(unsigned char b, int addr); 216extern void outw(unsigned short b, int addr); 217extern void outl(unsigned int b, int addr); 218#elif defined(CONFIG_EISA) 219#define inb eisa_in8 220#define inw eisa_in16 221#define inl eisa_in32 222#define outb eisa_out8 223#define outw eisa_out16 224#define outl eisa_out32 225#else 226static inline char inb(unsigned long addr) 227{ 228 BUG(); 229 return -1; 230} 231 232static inline short inw(unsigned long addr) 233{ 234 BUG(); 235 return -1; 236} 237 238static inline int inl(unsigned long addr) 239{ 240 BUG(); 241 return -1; 242} 243 244#define outb(x, y) BUG() 245#define outw(x, y) BUG() 246#define outl(x, y) BUG() 247#endif 248 249/* 250 * String versions of in/out ops: 251 */ 252extern void insb (unsigned long port, void *dst, unsigned long count); 253extern void insw (unsigned long port, void *dst, unsigned long count); 254extern void insl (unsigned long port, void *dst, unsigned long count); 255extern void outsb (unsigned long port, const void *src, unsigned long count); 256extern void outsw (unsigned long port, const void *src, unsigned long count); 257extern void outsl (unsigned long port, const void *src, unsigned long count); 258 259 260/* IO Port space is : BBiiii where BB is HBA number. */ 261#define IO_SPACE_LIMIT 0x00ffffff 262 263 264#define dma_cache_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) 265#define dma_cache_wback(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) 266#define dma_cache_wback_inv(_start,_size) do { flush_kernel_dcache_range(_start,_size); } while (0) 267 268/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 269 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit 270 * mode (essentially just sign extending. This macro takes in a 32 271 * bit I/O address (still with the leading f) and outputs the correct 272 * value for either 32 or 64 bit mode */ 273#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) 274 275#include <asm-generic/iomap.h> 276 277/* 278 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 279 * access 280 */ 281#define xlate_dev_mem_ptr(p) __va(p) 282 283/* 284 * Convert a virtual cached pointer to an uncached pointer 285 */ 286#define xlate_dev_kmem_ptr(p) p 287 288#endif 289