Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef __ASM_SH_IO_H |
| 2 | #define __ASM_SH_IO_H |
| 3 | |
| 4 | /* |
| 5 | * Convention: |
| 6 | * read{b,w,l}/write{b,w,l} are for PCI, |
| 7 | * while in{b,w,l}/out{b,w,l} are for ISA |
| 8 | * These may (will) be platform specific function. |
| 9 | * In addition we have 'pausing' versions: in{b,w,l}_p/out{b,w,l}_p |
| 10 | * and 'string' versions: ins{b,w,l}/outs{b,w,l} |
| 11 | * For read{b,w,l} and write{b,w,l} there are also __raw versions, which |
| 12 | * do not have a memory barrier after them. |
| 13 | * |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 14 | * In addition, we have |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | * ctrl_in{b,w,l}/ctrl_out{b,w,l} for SuperH specific I/O. |
| 16 | * which are processor specific. |
| 17 | */ |
| 18 | |
| 19 | /* |
| 20 | * We follow the Alpha convention here: |
| 21 | * __inb expands to an inline function call (which calls via the mv) |
| 22 | * _inb is a real function call (note ___raw fns are _ version of __raw) |
| 23 | * inb by default expands to _inb, but the machine specific code may |
| 24 | * define it to __inb if it chooses. |
| 25 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 26 | #include <linux/config.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/cache.h> |
| 28 | #include <asm/system.h> |
| 29 | #include <asm/addrspace.h> |
| 30 | #include <asm/machvec.h> |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 31 | #include <asm/pgtable.h> |
| 32 | #include <asm-generic/iomap.h> |
| 33 | |
| 34 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
| 36 | /* |
| 37 | * Depending on which platform we are running on, we need different |
| 38 | * I/O functions. |
| 39 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 40 | #define __IO_PREFIX generic |
| 41 | #include <asm/io_generic.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 43 | #define maybebadio(port) \ |
| 44 | printk(KERN_ERR "bad PC-like io %s:%u for port 0x%lx at 0x%08x\n", \ |
| 45 | __FUNCTION__, __LINE__, (port), (u32)__builtin_return_address(0)) |
| 46 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | /* |
| 48 | * Since boards are able to define their own set of I/O routines through |
| 49 | * their respective machine vector, we always wrap through the mv. |
| 50 | * |
| 51 | * Also, in the event that a board hasn't provided its own definition for |
| 52 | * a given routine, it will be wrapped to generic code at run-time. |
| 53 | */ |
| 54 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 55 | #define __inb(p) sh_mv.mv_inb((p)) |
| 56 | #define __inw(p) sh_mv.mv_inw((p)) |
| 57 | #define __inl(p) sh_mv.mv_inl((p)) |
| 58 | #define __outb(x,p) sh_mv.mv_outb((x),(p)) |
| 59 | #define __outw(x,p) sh_mv.mv_outw((x),(p)) |
| 60 | #define __outl(x,p) sh_mv.mv_outl((x),(p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 62 | #define __inb_p(p) sh_mv.mv_inb_p((p)) |
| 63 | #define __inw_p(p) sh_mv.mv_inw_p((p)) |
| 64 | #define __inl_p(p) sh_mv.mv_inl_p((p)) |
| 65 | #define __outb_p(x,p) sh_mv.mv_outb_p((x),(p)) |
| 66 | #define __outw_p(x,p) sh_mv.mv_outw_p((x),(p)) |
| 67 | #define __outl_p(x,p) sh_mv.mv_outl_p((x),(p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 69 | #define __insb(p,b,c) sh_mv.mv_insb((p), (b), (c)) |
| 70 | #define __insw(p,b,c) sh_mv.mv_insw((p), (b), (c)) |
| 71 | #define __insl(p,b,c) sh_mv.mv_insl((p), (b), (c)) |
| 72 | #define __outsb(p,b,c) sh_mv.mv_outsb((p), (b), (c)) |
| 73 | #define __outsw(p,b,c) sh_mv.mv_outsw((p), (b), (c)) |
| 74 | #define __outsl(p,b,c) sh_mv.mv_outsl((p), (b), (c)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 76 | #define __readb(a) sh_mv.mv_readb((a)) |
| 77 | #define __readw(a) sh_mv.mv_readw((a)) |
| 78 | #define __readl(a) sh_mv.mv_readl((a)) |
| 79 | #define __writeb(v,a) sh_mv.mv_writeb((v),(a)) |
| 80 | #define __writew(v,a) sh_mv.mv_writew((v),(a)) |
| 81 | #define __writel(v,a) sh_mv.mv_writel((v),(a)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 83 | #define inb __inb |
| 84 | #define inw __inw |
| 85 | #define inl __inl |
| 86 | #define outb __outb |
| 87 | #define outw __outw |
| 88 | #define outl __outl |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 90 | #define inb_p __inb_p |
| 91 | #define inw_p __inw_p |
| 92 | #define inl_p __inl_p |
| 93 | #define outb_p __outb_p |
| 94 | #define outw_p __outw_p |
| 95 | #define outl_p __outl_p |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 97 | #define insb __insb |
| 98 | #define insw __insw |
| 99 | #define insl __insl |
| 100 | #define outsb __outsb |
| 101 | #define outsw __outsw |
| 102 | #define outsl __outsl |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 104 | #define __raw_readb(a) __readb((void __iomem *)(a)) |
| 105 | #define __raw_readw(a) __readw((void __iomem *)(a)) |
| 106 | #define __raw_readl(a) __readl((void __iomem *)(a)) |
| 107 | #define __raw_writeb(v, a) __writeb(v, (void __iomem *)(a)) |
| 108 | #define __raw_writew(v, a) __writew(v, (void __iomem *)(a)) |
| 109 | #define __raw_writel(v, a) __writel(v, (void __iomem *)(a)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 111 | /* |
| 112 | * The platform header files may define some of these macros to use |
| 113 | * the inlined versions where appropriate. These macros may also be |
| 114 | * redefined by userlevel programs. |
| 115 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 116 | #ifdef __readb |
| 117 | # define readb(a) ({ unsigned long r_ = __raw_readb(a); mb(); r_; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #endif |
| 119 | #ifdef __raw_readw |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 120 | # define readw(a) ({ unsigned long r_ = __raw_readw(a); mb(); r_; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | #endif |
| 122 | #ifdef __raw_readl |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 123 | # define readl(a) ({ unsigned long r_ = __raw_readl(a); mb(); r_; }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | #endif |
| 125 | |
| 126 | #ifdef __raw_writeb |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 127 | # define writeb(v,a) ({ __raw_writeb((v),(a)); mb(); }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #endif |
| 129 | #ifdef __raw_writew |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 130 | # define writew(v,a) ({ __raw_writew((v),(a)); mb(); }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | #endif |
| 132 | #ifdef __raw_writel |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 133 | # define writel(v,a) ({ __raw_writel((v),(a)); mb(); }) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | #endif |
| 135 | |
| 136 | #define readb_relaxed(a) readb(a) |
| 137 | #define readw_relaxed(a) readw(a) |
| 138 | #define readl_relaxed(a) readl(a) |
| 139 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 140 | /* Simple MMIO */ |
| 141 | #define ioread8(a) readb(a) |
| 142 | #define ioread16(a) readw(a) |
| 143 | #define ioread16be(a) be16_to_cpu(__raw_readw((a))) |
| 144 | #define ioread32(a) readl(a) |
| 145 | #define ioread32be(a) be32_to_cpu(__raw_readl((a))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 147 | #define iowrite8(v,a) writeb((v),(a)) |
| 148 | #define iowrite16(v,a) writew((v),(a)) |
| 149 | #define iowrite16be(v,a) __raw_writew(cpu_to_be16((v)),(a)) |
| 150 | #define iowrite32(v,a) writel((v),(a)) |
| 151 | #define iowrite32be(v,a) __raw_writel(cpu_to_be32((v)),(a)) |
| 152 | |
| 153 | #define ioread8_rep(a,d,c) insb((a),(d),(c)) |
| 154 | #define ioread16_rep(a,d,c) insw((a),(d),(c)) |
| 155 | #define ioread32_rep(a,d,c) insl((a),(d),(c)) |
| 156 | |
| 157 | #define iowrite8_rep(a,s,c) outsb((a),(s),(c)) |
| 158 | #define iowrite16_rep(a,s,c) outsw((a),(s),(c)) |
| 159 | #define iowrite32_rep(a,s,c) outsl((a),(s),(c)) |
| 160 | |
| 161 | #define mmiowb() wmb() /* synco on SH-4A, otherwise a nop */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
| 163 | /* |
| 164 | * This function provides a method for the generic case where a board-specific |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 165 | * ioport_map simply needs to return the port + some arbitrary port base. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | * |
| 167 | * We use this at board setup time to implicitly set the port base, and |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 168 | * as a result, we can use the generic ioport_map. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | */ |
| 170 | static inline void __set_io_port_base(unsigned long pbase) |
| 171 | { |
| 172 | extern unsigned long generic_io_base; |
| 173 | |
| 174 | generic_io_base = pbase; |
| 175 | } |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | /* We really want to try and get these to memcpy etc */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 178 | extern void memcpy_fromio(void *, volatile void __iomem *, unsigned long); |
| 179 | extern void memcpy_toio(volatile void __iomem *, const void *, unsigned long); |
| 180 | extern void memset_io(volatile void __iomem *, int, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
| 182 | /* SuperH on-chip I/O functions */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 183 | static inline unsigned char ctrl_inb(unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
| 185 | return *(volatile unsigned char*)addr; |
| 186 | } |
| 187 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 188 | static inline unsigned short ctrl_inw(unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | { |
| 190 | return *(volatile unsigned short*)addr; |
| 191 | } |
| 192 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 193 | static inline unsigned int ctrl_inl(unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | { |
| 195 | return *(volatile unsigned long*)addr; |
| 196 | } |
| 197 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 198 | static inline void ctrl_outb(unsigned char b, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | { |
| 200 | *(volatile unsigned char*)addr = b; |
| 201 | } |
| 202 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 203 | static inline void ctrl_outw(unsigned short b, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
| 205 | *(volatile unsigned short*)addr = b; |
| 206 | } |
| 207 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 208 | static inline void ctrl_outl(unsigned int b, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | { |
| 210 | *(volatile unsigned long*)addr = b; |
| 211 | } |
| 212 | |
| 213 | #define IO_SPACE_LIMIT 0xffffffff |
| 214 | |
| 215 | /* |
| 216 | * Change virtual addresses to physical addresses and vv. |
| 217 | * These are trivial on the 1:1 Linux/SuperH mapping |
| 218 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 219 | static inline unsigned long virt_to_phys(volatile void *address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
| 221 | return PHYSADDR(address); |
| 222 | } |
| 223 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 224 | static inline void *phys_to_virt(unsigned long address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
| 226 | return (void *)P1SEGADDR(address); |
| 227 | } |
| 228 | |
| 229 | #define virt_to_bus virt_to_phys |
| 230 | #define bus_to_virt phys_to_virt |
| 231 | #define page_to_bus page_to_phys |
| 232 | |
| 233 | /* |
| 234 | * readX/writeX() are used to access memory mapped devices. On some |
| 235 | * architectures the memory mapped IO stuff needs to be accessed |
| 236 | * differently. On the x86 architecture, we just read/write the |
| 237 | * memory location directly. |
| 238 | * |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 239 | * On SH, we traditionally have the whole physical address space mapped |
| 240 | * at all times (as MIPS does), so "ioremap()" and "iounmap()" do not |
| 241 | * need to do anything but place the address in the proper segment. This |
| 242 | * is true for P1 and P2 addresses, as well as some P3 ones. However, |
| 243 | * most of the P3 addresses and newer cores using extended addressing |
| 244 | * need to map through page tables, so the ioremap() implementation |
| 245 | * becomes a bit more complicated. See arch/sh/mm/ioremap.c for |
| 246 | * additional notes on this. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | * |
| 248 | * We cheat a bit and always return uncachable areas until we've fixed |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 249 | * the drivers to handle caching properly. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | */ |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 251 | #ifdef CONFIG_MMU |
| 252 | void __iomem *__ioremap(unsigned long offset, unsigned long size, |
| 253 | unsigned long flags); |
| 254 | void __iounmap(void __iomem *addr); |
| 255 | #else |
| 256 | #define __ioremap(offset, size, flags) ((void __iomem *)(offset)) |
| 257 | #define __iounmap(addr) do { } while (0) |
| 258 | #endif /* CONFIG_MMU */ |
| 259 | |
| 260 | static inline void __iomem * |
| 261 | __ioremap_mode(unsigned long offset, unsigned long size, unsigned long flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | { |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 263 | unsigned long last_addr = offset + size - 1; |
| 264 | |
| 265 | /* |
| 266 | * For P1 and P2 space this is trivial, as everything is already |
| 267 | * mapped. Uncached access for P1 addresses are done through P2. |
| 268 | * In the P3 case or for addresses outside of the 29-bit space, |
| 269 | * mapping must be done by the PMB or by using page tables. |
| 270 | */ |
| 271 | if (likely(PXSEG(offset) < P3SEG && PXSEG(last_addr) < P3SEG)) { |
| 272 | if (unlikely(flags & _PAGE_CACHABLE)) |
| 273 | return (void __iomem *)P1SEGADDR(offset); |
| 274 | |
| 275 | return (void __iomem *)P2SEGADDR(offset); |
| 276 | } |
| 277 | |
| 278 | return __ioremap(offset, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 281 | #define ioremap(offset, size) \ |
| 282 | __ioremap_mode((offset), (size), 0) |
| 283 | #define ioremap_nocache(offset, size) \ |
| 284 | __ioremap_mode((offset), (size), 0) |
| 285 | #define ioremap_cache(offset, size) \ |
| 286 | __ioremap_mode((offset), (size), _PAGE_CACHABLE) |
| 287 | #define p3_ioremap(offset, size, flags) \ |
| 288 | __ioremap((offset), (size), (flags)) |
| 289 | #define iounmap(addr) \ |
| 290 | __iounmap((addr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
Paul Mundt | b66c1a3 | 2006-01-16 22:14:15 -0800 | [diff] [blame] | 292 | static inline int check_signature(char __iomem *io_addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | const unsigned char *signature, int length) |
| 294 | { |
| 295 | int retval = 0; |
| 296 | do { |
| 297 | if (readb(io_addr) != *signature) |
| 298 | goto out; |
| 299 | io_addr++; |
| 300 | signature++; |
| 301 | length--; |
| 302 | } while (length); |
| 303 | retval = 1; |
| 304 | out: |
| 305 | return retval; |
| 306 | } |
| 307 | |
| 308 | /* |
| 309 | * The caches on some architectures aren't dma-coherent and have need to |
| 310 | * handle this in software. There are three types of operations that |
| 311 | * can be applied to dma buffers. |
| 312 | * |
| 313 | * - dma_cache_wback_inv(start, size) makes caches and RAM coherent by |
| 314 | * writing the content of the caches back to memory, if necessary. |
| 315 | * The function also invalidates the affected part of the caches as |
| 316 | * necessary before DMA transfers from outside to memory. |
| 317 | * - dma_cache_inv(start, size) invalidates the affected parts of the |
| 318 | * caches. Dirty lines of the caches may be written back or simply |
| 319 | * be discarded. This operation is necessary before dma operations |
| 320 | * to the memory. |
| 321 | * - dma_cache_wback(start, size) writes back any dirty lines but does |
| 322 | * not invalidate the cache. This can be used before DMA reads from |
| 323 | * memory, |
| 324 | */ |
| 325 | |
| 326 | #define dma_cache_wback_inv(_start,_size) \ |
| 327 | __flush_purge_region(_start,_size) |
| 328 | #define dma_cache_inv(_start,_size) \ |
| 329 | __flush_invalidate_region(_start,_size) |
| 330 | #define dma_cache_wback(_start,_size) \ |
| 331 | __flush_wback_region(_start,_size) |
| 332 | |
| 333 | /* |
| 334 | * Convert a physical pointer to a virtual kernel pointer for /dev/mem |
| 335 | * access |
| 336 | */ |
| 337 | #define xlate_dev_mem_ptr(p) __va(p) |
| 338 | |
| 339 | /* |
| 340 | * Convert a virtual cached pointer to an uncached pointer |
| 341 | */ |
| 342 | #define xlate_dev_kmem_ptr(p) p |
| 343 | |
| 344 | #endif /* __KERNEL__ */ |
| 345 | |
| 346 | #endif /* __ASM_SH_IO_H */ |