1 /* originally from linux source. 2 * removed the dependencies on CONFIG_ values 3 * removed virt_to_phys stuff (and in fact everything surrounded by #if __KERNEL__) 4 * Modified By Rob Taylor, Flying Pig Systems, 2000 5 */ 6 7 #ifndef _PPC_IO_H 8 #define _PPC_IO_H 9 10 #include <asm/byteorder.h> 11 12 #ifdef CONFIG_ADDR_MAP 13 #include <addr_map.h> 14 #endif 15 16 #define SIO_CONFIG_RA 0x398 17 #define SIO_CONFIG_RD 0x399 18 19 #ifndef _IO_BASE 20 #define _IO_BASE 0 21 #endif 22 23 #define readb(addr) in_8((volatile u8 *)(addr)) 24 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b)) 25 #if !defined(__BIG_ENDIAN) 26 #define readw(addr) (*(volatile u16 *) (addr)) 27 #define readl(addr) (*(volatile u32 *) (addr)) 28 #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b)) 29 #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b)) 30 #else 31 #define readw(addr) in_le16((volatile u16 *)(addr)) 32 #define readl(addr) in_le32((volatile u32 *)(addr)) 33 #define writew(b,addr) out_le16((volatile u16 *)(addr),(b)) 34 #define writel(b,addr) out_le32((volatile u32 *)(addr),(b)) 35 #endif 36 37 /* 38 * The insw/outsw/insl/outsl macros don't do byte-swapping. 39 * They are only used in practice for transferring buffers which 40 * are arrays of bytes, and byte-swapping is not appropriate in 41 * that case. - paulus 42 */ 43 #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns)) 44 #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns)) 45 #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 46 #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 47 #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 48 #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 49 50 #define inb(port) in_8((u8 *)((port)+_IO_BASE)) 51 #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val)) 52 #if !defined(__BIG_ENDIAN) 53 #define inw(port) in_be16((u16 *)((port)+_IO_BASE)) 54 #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val)) 55 #define inl(port) in_be32((u32 *)((port)+_IO_BASE)) 56 #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val)) 57 #else 58 #define inw(port) in_le16((u16 *)((port)+_IO_BASE)) 59 #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val)) 60 #define inl(port) in_le32((u32 *)((port)+_IO_BASE)) 61 #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val)) 62 #endif 63 64 #define inb_p(port) in_8((u8 *)((port)+_IO_BASE)) 65 #define outb_p(val, port) out_8((u8 *)((port)+_IO_BASE), (val)) 66 #define inw_p(port) in_le16((u16 *)((port)+_IO_BASE)) 67 #define outw_p(val, port) out_le16((u16 *)((port)+_IO_BASE), (val)) 68 #define inl_p(port) in_le32((u32 *)((port)+_IO_BASE)) 69 #define outl_p(val, port) out_le32((u32 *)((port)+_IO_BASE), (val)) 70 71 extern void _insb(volatile u8 *port, void *buf, int ns); 72 extern void _outsb(volatile u8 *port, const void *buf, int ns); 73 extern void _insw(volatile u16 *port, void *buf, int ns); 74 extern void _outsw(volatile u16 *port, const void *buf, int ns); 75 extern void _insl(volatile u32 *port, void *buf, int nl); 76 extern void _outsl(volatile u32 *port, const void *buf, int nl); 77 extern void _insw_ns(volatile u16 *port, void *buf, int ns); 78 extern void _outsw_ns(volatile u16 *port, const void *buf, int ns); 79 extern void _insl_ns(volatile u32 *port, void *buf, int nl); 80 extern void _outsl_ns(volatile u32 *port, const void *buf, int nl); 81 82 /* 83 * The *_ns versions below don't do byte-swapping. 84 * Neither do the standard versions now, these are just here 85 * for older code. 86 */ 87 #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 88 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 89 #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 90 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 91 92 93 #define IO_SPACE_LIMIT ~0 94 95 #define memset_io(a,b,c) memset((void *)(a),(b),(c)) 96 #define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c)) 97 #define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c)) 98 99 /* 100 * Enforce In-order Execution of I/O: 101 * Acts as a barrier to ensure all previous I/O accesses have 102 * completed before any further ones are issued. 103 */ 104 static inline void eieio(void) 105 { 106 __asm__ __volatile__ ("eieio" : : : "memory"); 107 } 108 109 static inline void sync(void) 110 { 111 __asm__ __volatile__ ("sync" : : : "memory"); 112 } 113 114 static inline void isync(void) 115 { 116 __asm__ __volatile__ ("isync" : : : "memory"); 117 } 118 119 /* Enforce in-order execution of data I/O. 120 * No distinction between read/write on PPC; use eieio for all three. 121 */ 122 #define iobarrier_rw() eieio() 123 #define iobarrier_r() eieio() 124 #define iobarrier_w() eieio() 125 126 #define mb() sync() 127 #define isb() isync() 128 129 /* 130 * Non ordered and non-swapping "raw" accessors 131 */ 132 #define PCI_FIX_ADDR(addr) (addr) 133 134 static inline unsigned char __raw_readb(const volatile void __iomem *addr) 135 { 136 return *(volatile unsigned char *)PCI_FIX_ADDR(addr); 137 } 138 static inline unsigned short __raw_readw(const volatile void __iomem *addr) 139 { 140 return *(volatile unsigned short *)PCI_FIX_ADDR(addr); 141 } 142 static inline unsigned int __raw_readl(const volatile void __iomem *addr) 143 { 144 return *(volatile unsigned int *)PCI_FIX_ADDR(addr); 145 } 146 static inline void __raw_writeb(unsigned char v, volatile void __iomem *addr) 147 { 148 *(volatile unsigned char *)PCI_FIX_ADDR(addr) = v; 149 } 150 static inline void __raw_writew(unsigned short v, volatile void __iomem *addr) 151 { 152 *(volatile unsigned short *)PCI_FIX_ADDR(addr) = v; 153 } 154 static inline void __raw_writel(unsigned int v, volatile void __iomem *addr) 155 { 156 *(volatile unsigned int *)PCI_FIX_ADDR(addr) = v; 157 } 158 159 /* 160 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier. 161 * 162 * Read operations have additional twi & isync to make sure the read 163 * is actually performed (i.e. the data has come back) before we start 164 * executing any following instructions. 165 */ 166 extern inline u8 in_8(const volatile unsigned char __iomem *addr) 167 { 168 u8 ret; 169 170 __asm__ __volatile__( 171 "sync; lbz%U1%X1 %0,%1;\n" 172 "twi 0,%0,0;\n" 173 "isync" : "=r" (ret) : "m" (*addr)); 174 return ret; 175 } 176 177 extern inline void out_8(volatile unsigned char __iomem *addr, u8 val) 178 { 179 __asm__ __volatile__("sync;\n" 180 "stb%U0%X0 %1,%0;\n" 181 : "=m" (*addr) 182 : "r" (val)); 183 } 184 185 extern inline u16 in_le16(const volatile unsigned short __iomem *addr) 186 { 187 u16 ret; 188 189 __asm__ __volatile__("sync; lhbrx %0,0,%1;\n" 190 "twi 0,%0,0;\n" 191 "isync" : "=r" (ret) : 192 "r" (addr), "m" (*addr)); 193 return ret; 194 } 195 196 extern inline u16 in_be16(const volatile unsigned short __iomem *addr) 197 { 198 u16 ret; 199 200 __asm__ __volatile__("sync; lhz%U1%X1 %0,%1;\n" 201 "twi 0,%0,0;\n" 202 "isync" : "=r" (ret) : "m" (*addr)); 203 return ret; 204 } 205 206 extern inline void out_le16(volatile unsigned short __iomem *addr, u16 val) 207 { 208 __asm__ __volatile__("sync; sthbrx %1,0,%2" : "=m" (*addr) : 209 "r" (val), "r" (addr)); 210 } 211 212 extern inline void out_be16(volatile unsigned short __iomem *addr, u16 val) 213 { 214 __asm__ __volatile__("sync; sth%U0%X0 %1,%0" : "=m" (*addr) : "r" (val)); 215 } 216 217 extern inline u32 in_le32(const volatile unsigned __iomem *addr) 218 { 219 u32 ret; 220 221 __asm__ __volatile__("sync; lwbrx %0,0,%1;\n" 222 "twi 0,%0,0;\n" 223 "isync" : "=r" (ret) : 224 "r" (addr), "m" (*addr)); 225 return ret; 226 } 227 228 extern inline u32 in_be32(const volatile unsigned __iomem *addr) 229 { 230 u32 ret; 231 232 __asm__ __volatile__("sync; lwz%U1%X1 %0,%1;\n" 233 "twi 0,%0,0;\n" 234 "isync" : "=r" (ret) : "m" (*addr)); 235 return ret; 236 } 237 238 extern inline void out_le32(volatile unsigned __iomem *addr, u32 val) 239 { 240 __asm__ __volatile__("sync; stwbrx %1,0,%2" : "=m" (*addr) : 241 "r" (val), "r" (addr)); 242 } 243 244 extern inline void out_be32(volatile unsigned __iomem *addr, u32 val) 245 { 246 __asm__ __volatile__("sync; stw%U0%X0 %1,%0" : "=m" (*addr) : "r" (val)); 247 } 248 249 /* Clear and set bits in one shot. These macros can be used to clear and 250 * set multiple bits in a register using a single call. These macros can 251 * also be used to set a multiple-bit bit pattern using a mask, by 252 * specifying the mask in the 'clear' parameter and the new bit pattern 253 * in the 'set' parameter. 254 */ 255 256 #define clrbits(type, addr, clear) \ 257 out_##type((addr), in_##type(addr) & ~(clear)) 258 259 #define setbits(type, addr, set) \ 260 out_##type((addr), in_##type(addr) | (set)) 261 262 #define clrsetbits(type, addr, clear, set) \ 263 out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) 264 265 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear) 266 #define setbits_be32(addr, set) setbits(be32, addr, set) 267 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) 268 269 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear) 270 #define setbits_le32(addr, set) setbits(le32, addr, set) 271 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) 272 273 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear) 274 #define setbits_be16(addr, set) setbits(be16, addr, set) 275 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) 276 277 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear) 278 #define setbits_le16(addr, set) setbits(le16, addr, set) 279 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) 280 281 #define clrbits_8(addr, clear) clrbits(8, addr, clear) 282 #define setbits_8(addr, set) setbits(8, addr, set) 283 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) 284 285 /* 286 * Given a physical address and a length, return a virtual address 287 * that can be used to access the memory range with the caching 288 * properties specified by "flags". 289 */ 290 #define MAP_NOCACHE (0) 291 #define MAP_WRCOMBINE (0) 292 #define MAP_WRBACK (0) 293 #define MAP_WRTHROUGH (0) 294 295 static inline void * 296 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) 297 { 298 #ifdef CONFIG_ADDR_MAP 299 return addrmap_phys_to_virt(paddr); 300 #else 301 return (void *)((unsigned long)paddr); 302 #endif 303 } 304 305 /* 306 * Take down a mapping set up by map_physmem(). 307 */ 308 static inline void unmap_physmem(void *vaddr, unsigned long flags) 309 { 310 311 } 312 313 static inline phys_addr_t virt_to_phys(void * vaddr) 314 { 315 #ifdef CONFIG_ADDR_MAP 316 return addrmap_virt_to_phys(vaddr); 317 #else 318 return (phys_addr_t)((unsigned long)vaddr); 319 #endif 320 } 321 322 #endif 323