1 #ifndef _ASM_IO_H 2 #define _ASM_IO_H 3 4 #include <linux/types.h> 5 #include <asm/pgtable.h> 6 7 extern unsigned long parisc_vmerge_boundary; 8 extern 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 static inline unsigned long isa_bus_to_virt(unsigned long addr) { 19 BUG(); 20 return 0; 21 } 22 23 static inline unsigned long isa_virt_to_bus(void *addr) { 24 BUG(); 25 return 0; 26 } 27 28 /* 29 * Memory mapped I/O 30 * 31 * readX()/writeX() do byteswapping and take an ioremapped address 32 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. 33 * gsc_*() don't byteswap and operate on physical addresses; 34 * eg dev->hpa or 0xfee00000. 35 */ 36 37 static inline unsigned char gsc_readb(unsigned long addr) 38 { 39 long flags; 40 unsigned char ret; 41 42 __asm__ __volatile__( 43 " rsm 2,%0\n" 44 " ldbx 0(%2),%1\n" 45 " mtsm %0\n" 46 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 47 48 return ret; 49 } 50 51 static inline unsigned short gsc_readw(unsigned long addr) 52 { 53 long flags; 54 unsigned short ret; 55 56 __asm__ __volatile__( 57 " rsm 2,%0\n" 58 " ldhx 0(%2),%1\n" 59 " mtsm %0\n" 60 : "=&r" (flags), "=r" (ret) : "r" (addr) ); 61 62 return ret; 63 } 64 65 static inline unsigned int gsc_readl(unsigned long addr) 66 { 67 u32 ret; 68 69 __asm__ __volatile__( 70 " ldwax 0(%1),%0\n" 71 : "=r" (ret) : "r" (addr) ); 72 73 return ret; 74 } 75 76 static inline unsigned long long gsc_readq(unsigned long addr) 77 { 78 unsigned long long ret; 79 80 #ifdef CONFIG_64BIT 81 __asm__ __volatile__( 82 " ldda 0(%1),%0\n" 83 : "=r" (ret) : "r" (addr) ); 84 #else 85 /* two reads may have side effects.. */ 86 ret = ((u64) gsc_readl(addr)) << 32; 87 ret |= gsc_readl(addr+4); 88 #endif 89 return ret; 90 } 91 92 static inline void gsc_writeb(unsigned char val, unsigned long addr) 93 { 94 long flags; 95 __asm__ __volatile__( 96 " rsm 2,%0\n" 97 " stbs %1,0(%2)\n" 98 " mtsm %0\n" 99 : "=&r" (flags) : "r" (val), "r" (addr) ); 100 } 101 102 static inline void gsc_writew(unsigned short val, unsigned long addr) 103 { 104 long flags; 105 __asm__ __volatile__( 106 " rsm 2,%0\n" 107 " sths %1,0(%2)\n" 108 " mtsm %0\n" 109 : "=&r" (flags) : "r" (val), "r" (addr) ); 110 } 111 112 static inline void gsc_writel(unsigned int val, unsigned long addr) 113 { 114 __asm__ __volatile__( 115 " stwas %0,0(%1)\n" 116 : : "r" (val), "r" (addr) ); 117 } 118 119 static inline void gsc_writeq(unsigned long long val, unsigned long addr) 120 { 121 #ifdef CONFIG_64BIT 122 __asm__ __volatile__( 123 " stda %0,0(%1)\n" 124 : : "r" (val), "r" (addr) ); 125 #else 126 /* two writes may have side effects.. */ 127 gsc_writel(val >> 32, addr); 128 gsc_writel(val, addr+4); 129 #endif 130 } 131 132 /* 133 * The standard PCI ioremap interfaces 134 */ 135 136 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags); 137 138 /* Most machines react poorly to I/O-space being cacheable... Instead let's 139 * define ioremap() in terms of ioremap_nocache(). 140 */ 141 static inline void __iomem * ioremap(unsigned long offset, unsigned long size) 142 { 143 return __ioremap(offset, size, _PAGE_NO_CACHE); 144 } 145 #define ioremap_nocache(off, sz) ioremap((off), (sz)) 146 147 extern void iounmap(const volatile void __iomem *addr); 148 149 static inline unsigned char __raw_readb(const volatile void __iomem *addr) 150 { 151 return (*(volatile unsigned char __force *) (addr)); 152 } 153 static inline unsigned short __raw_readw(const volatile void __iomem *addr) 154 { 155 return *(volatile unsigned short __force *) addr; 156 } 157 static inline unsigned int __raw_readl(const volatile void __iomem *addr) 158 { 159 return *(volatile unsigned int __force *) addr; 160 } 161 static inline unsigned long long __raw_readq(const volatile void __iomem *addr) 162 { 163 return *(volatile unsigned long long __force *) addr; 164 } 165 166 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr) 167 { 168 *(volatile unsigned char __force *) addr = b; 169 } 170 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr) 171 { 172 *(volatile unsigned short __force *) addr = b; 173 } 174 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr) 175 { 176 *(volatile unsigned int __force *) addr = b; 177 } 178 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr) 179 { 180 *(volatile unsigned long long __force *) addr = b; 181 } 182 183 /* readb can never be const, so use __fswab instead of le*_to_cpu */ 184 #define readb(addr) __raw_readb(addr) 185 #define readw(addr) __fswab16(__raw_readw(addr)) 186 #define readl(addr) __fswab32(__raw_readl(addr)) 187 #define readq(addr) __fswab64(__raw_readq(addr)) 188 #define writeb(b, addr) __raw_writeb(b, addr) 189 #define writew(b, addr) __raw_writew(cpu_to_le16(b), addr) 190 #define writel(b, addr) __raw_writel(cpu_to_le32(b), addr) 191 #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr) 192 193 #define readb_relaxed(addr) readb(addr) 194 #define readw_relaxed(addr) readw(addr) 195 #define readl_relaxed(addr) readl(addr) 196 #define readq_relaxed(addr) readq(addr) 197 198 #define mmiowb() do { } while (0) 199 200 void memset_io(volatile void __iomem *addr, unsigned char val, int count); 201 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); 202 void memcpy_toio(volatile void __iomem *dst, const void *src, int count); 203 204 /* Port-space IO */ 205 206 #define inb_p inb 207 #define inw_p inw 208 #define inl_p inl 209 #define outb_p outb 210 #define outw_p outw 211 #define outl_p outl 212 213 extern unsigned char eisa_in8(unsigned short port); 214 extern unsigned short eisa_in16(unsigned short port); 215 extern unsigned int eisa_in32(unsigned short port); 216 extern void eisa_out8(unsigned char data, unsigned short port); 217 extern void eisa_out16(unsigned short data, unsigned short port); 218 extern void eisa_out32(unsigned int data, unsigned short port); 219 220 #if defined(CONFIG_PCI) 221 extern unsigned char inb(int addr); 222 extern unsigned short inw(int addr); 223 extern unsigned int inl(int addr); 224 225 extern void outb(unsigned char b, int addr); 226 extern void outw(unsigned short b, int addr); 227 extern void outl(unsigned int b, int addr); 228 #elif defined(CONFIG_EISA) 229 #define inb eisa_in8 230 #define inw eisa_in16 231 #define inl eisa_in32 232 #define outb eisa_out8 233 #define outw eisa_out16 234 #define outl eisa_out32 235 #else 236 static inline char inb(unsigned long addr) 237 { 238 BUG(); 239 return -1; 240 } 241 242 static inline short inw(unsigned long addr) 243 { 244 BUG(); 245 return -1; 246 } 247 248 static inline int inl(unsigned long addr) 249 { 250 BUG(); 251 return -1; 252 } 253 254 #define outb(x, y) BUG() 255 #define outw(x, y) BUG() 256 #define outl(x, y) BUG() 257 #endif 258 259 /* 260 * String versions of in/out ops: 261 */ 262 extern void insb (unsigned long port, void *dst, unsigned long count); 263 extern void insw (unsigned long port, void *dst, unsigned long count); 264 extern void insl (unsigned long port, void *dst, unsigned long count); 265 extern void outsb (unsigned long port, const void *src, unsigned long count); 266 extern void outsw (unsigned long port, const void *src, unsigned long count); 267 extern void outsl (unsigned long port, const void *src, unsigned long count); 268 269 270 /* IO Port space is : BBiiii where BB is HBA number. */ 271 #define IO_SPACE_LIMIT 0x00ffffff 272 273 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 274 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit 275 * mode (essentially just sign extending. This macro takes in a 32 276 * bit I/O address (still with the leading f) and outputs the correct 277 * value for either 32 or 64 bit mode */ 278 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) 279 280 #include <asm-generic/iomap.h> 281 282 /* 283 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 284 * access 285 */ 286 #define xlate_dev_mem_ptr(p) __va(p) 287 288 /* 289 * Convert a virtual cached pointer to an uncached pointer 290 */ 291 #define xlate_dev_kmem_ptr(p) p 292 293 #endif 294