1 /* 2 * linux/include/asm-sh/io.h 3 * 4 * Copyright (C) 1996-2000 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * Modifications: 11 * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both 12 * constant addresses and variable addresses. 13 * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture 14 * specific IO header files. 15 * 27-Mar-1999 PJB Second parameter of memcpy_toio is const.. 16 * 04-Apr-1999 PJB Added check_signature. 17 * 12-Dec-1999 RMK More cleanups 18 * 18-Jun-2000 RMK Removed virt_to_* and friends definitions 19 */ 20 #ifndef __ASM_SH_IO_H 21 #define __ASM_SH_IO_H 22 23 #ifdef __KERNEL__ 24 25 #include <linux/types.h> 26 #include <asm/byteorder.h> 27 28 /* 29 * Generic virtual read/write. Note that we don't support half-word 30 * read/writes. We define __arch_*[bl] here, and leave __arch_*w 31 * to the architecture specific code. 32 */ 33 #define __arch_getb(a) (*(volatile unsigned char *)(a)) 34 #define __arch_getw(a) (*(volatile unsigned short *)(a)) 35 #define __arch_getl(a) (*(volatile unsigned int *)(a)) 36 37 #define __arch_putb(v, a) (*(volatile unsigned char *)(a) = (v)) 38 #define __arch_putw(v, a) (*(volatile unsigned short *)(a) = (v)) 39 #define __arch_putl(v, a) (*(volatile unsigned int *)(a) = (v)) 40 41 extern void __raw_writesb(unsigned int addr, const void *data, int bytelen); 42 extern void __raw_writesw(unsigned int addr, const void *data, int wordlen); 43 extern void __raw_writesl(unsigned int addr, const void *data, int longlen); 44 45 extern void __raw_readsb(unsigned int addr, void *data, int bytelen); 46 extern void __raw_readsw(unsigned int addr, void *data, int wordlen); 47 extern void __raw_readsl(unsigned int addr, void *data, int longlen); 48 49 #define __raw_writeb(v, a) __arch_putb(v, a) 50 #define __raw_writew(v, a) __arch_putw(v, a) 51 #define __raw_writel(v, a) __arch_putl(v, a) 52 53 #define __raw_readb(a) __arch_getb(a) 54 #define __raw_readw(a) __arch_getw(a) 55 #define __raw_readl(a) __arch_getl(a) 56 57 /* 58 * The compiler seems to be incapable of optimising constants 59 * properly. Spell it out to the compiler in some cases. 60 * These are only valid for small values of "off" (< 1<<12) 61 */ 62 #define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off) 63 #define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off) 64 #define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off) 65 66 #define __raw_base_readb(base, off) __arch_base_getb(base, off) 67 #define __raw_base_readw(base, off) __arch_base_getw(base, off) 68 #define __raw_base_readl(base, off) __arch_base_getl(base, off) 69 70 /* 71 * IO port access primitives 72 * ------------------------- 73 * 74 * The SH doesn't have special IO access instructions; all IO is memory 75 * mapped. Note that these are defined to perform little endian accesses 76 * only. Their primary purpose is to access PCI and ISA peripherals. 77 * 78 * Note that we prevent GCC re-ordering or caching values in expressions 79 * by introducing sequence points into the in*() definitions. Note that 80 * __raw_* do not guarantee this behaviour. 81 * 82 * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space. 83 */ 84 #define outb(v, p) __raw_writeb(v, p) 85 #define outw(v, p) __raw_writew(cpu_to_le16(v), p) 86 #define outl(v, p) __raw_writel(cpu_to_le32(v), p) 87 88 #define inb(p) ({ unsigned int __v = __raw_readb(p); __v; }) 89 #define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; }) 90 #define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; }) 91 92 #define outsb(p, d, l) __raw_writesb(p, d, l) 93 #define outsw(p, d, l) __raw_writesw(p, d, l) 94 #define outsl(p, d, l) __raw_writesl(p, d, l) 95 96 #define insb(p, d, l) __raw_readsb(p, d, l) 97 #define insw(p, d, l) __raw_readsw(p, d, l) 98 #define insl(p, d, l) __raw_readsl(p, d, l) 99 100 #define outb_p(val, port) outb((val), (port)) 101 #define outw_p(val, port) outw((val), (port)) 102 #define outl_p(val, port) outl((val), (port)) 103 #define inb_p(port) inb((port)) 104 #define inw_p(port) inw((port)) 105 #define inl_p(port) inl((port)) 106 107 #define outsb_p(port, from, len) outsb(port, from, len) 108 #define outsw_p(port, from, len) outsw(port, from, len) 109 #define outsl_p(port, from, len) outsl(port, from, len) 110 #define insb_p(port, to, len) insb(port, to, len) 111 #define insw_p(port, to, len) insw(port, to, len) 112 #define insl_p(port, to, len) insl(port, to, len) 113 114 /* for U-Boot PCI */ 115 #define out_8(port, val) outb(val, port) 116 #define out_le16(port, val) outw(val, port) 117 #define out_le32(port, val) outl(val, port) 118 #define in_8(port) inb(port) 119 #define in_le16(port) inw(port) 120 #define in_le32(port) inl(port) 121 122 /* 123 * DMA-consistent mapping functions. These allocate/free a region of 124 * uncached, unwrite-buffered mapped memory space for use with DMA 125 * devices. This is the "generic" version. The PCI specific version 126 * is in pci.h 127 */ 128 extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle); 129 extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle); 130 extern void consistent_sync(void *vaddr, size_t size, int rw); 131 132 /* 133 * String version of IO memory access ops: 134 */ 135 extern void _memcpy_fromio(void *, unsigned long, size_t); 136 extern void _memcpy_toio(unsigned long, const void *, size_t); 137 extern void _memset_io(unsigned long, int, size_t); 138 139 /* 140 * If this architecture has PCI memory IO, then define the read/write 141 * macros. These should only be used with the cookie passed from 142 * ioremap. 143 */ 144 #ifdef __mem_pci 145 146 #define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; }) 147 #define readw(c)\ 148 ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; }) 149 #define readl(c)\ 150 ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; }) 151 152 #define writeb(v, c) __raw_writeb(v, __mem_pci(c)) 153 #define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c)) 154 #define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c)) 155 156 #define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l)) 157 #define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l)) 158 #define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l)) 159 160 #define eth_io_copy_and_sum(s, c, l, b) \ 161 eth_copy_and_sum((s), __mem_pci(c), (l), (b)) 162 163 static inline int 164 check_signature(unsigned long io_addr, const unsigned char *signature, 165 int length) 166 { 167 int retval = 0; 168 do { 169 if (readb(io_addr) != *signature) 170 goto out; 171 io_addr++; 172 signature++; 173 length--; 174 } while (length); 175 retval = 1; 176 out: 177 return retval; 178 } 179 180 #elif !defined(readb) 181 182 #define readb(addr) __raw_readb(addr) 183 #define readw(addr) __raw_readw(addr) 184 #define readl(addr) __raw_readl(addr) 185 #define writeb(v, addr) __raw_writeb(v, addr) 186 #define writew(v, addr) __raw_writew(v, addr) 187 #define writel(v, addr) __raw_writel(v, addr) 188 189 #define check_signature(io, sig, len) (0) 190 191 #endif /* __mem_pci */ 192 193 static inline void sync(void) 194 { 195 } 196 197 /* 198 * Clear and set bits in one shot. These macros can be used to clear and 199 * set multiple bits in a register using a single call. These macros can 200 * also be used to set a multiple-bit bit pattern using a mask, by 201 * specifying the mask in the 'clear' parameter and the new bit pattern 202 * in the 'set' parameter. 203 */ 204 205 #define clrbits(type, addr, clear) \ 206 out_##type((addr), in_##type(addr) & ~(clear)) 207 208 #define setbits(type, addr, set) \ 209 out_##type((addr), in_##type(addr) | (set)) 210 211 #define clrsetbits(type, addr, clear, set) \ 212 out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) 213 214 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear) 215 #define setbits_be32(addr, set) setbits(be32, addr, set) 216 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) 217 218 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear) 219 #define setbits_le32(addr, set) setbits(le32, addr, set) 220 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) 221 222 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear) 223 #define setbits_be16(addr, set) setbits(be16, addr, set) 224 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) 225 226 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear) 227 #define setbits_le16(addr, set) setbits(le16, addr, set) 228 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) 229 230 #define clrbits_8(addr, clear) clrbits(8, addr, clear) 231 #define setbits_8(addr, set) setbits(8, addr, set) 232 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) 233 234 /* 235 * Given a physical address and a length, return a virtual address 236 * that can be used to access the memory range with the caching 237 * properties specified by "flags". 238 */ 239 #define MAP_NOCACHE (0) 240 #define MAP_WRCOMBINE (0) 241 #define MAP_WRBACK (0) 242 #define MAP_WRTHROUGH (0) 243 244 static inline void * 245 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags) 246 { 247 return (void *)paddr; 248 } 249 250 /* 251 * Take down a mapping set up by map_physmem(). 252 */ 253 static inline void unmap_physmem(void *vaddr, unsigned long flags) 254 { 255 256 } 257 258 static inline phys_addr_t virt_to_phys(void *vaddr) 259 { 260 return (phys_addr_t)(vaddr); 261 } 262 263 #endif /* __KERNEL__ */ 264 #endif /* __ASM_SH_IO_H */ 265