release/src-rt-6.x/linux/linux-2.6/include/asm-h8300/io.h

   1 #ifndef _H8300_IO_H
   2 #define _H8300_IO_H
   3
   4 #ifdef __KERNEL__
   5
   6 #include <asm/virtconvert.h>
   7
   8 #if defined(CONFIG_H83007) || defined(CONFIG_H83068)
   9 #include <asm/regs306x.h>
  10 #elif defined(CONFIG_H8S2678)
  11 #include <asm/regs267x.h>
  12 #else
  13 #error UNKNOWN CPU TYPE
  14 #endif
  15
  16
  17 /*
  18  * These are for ISA/PCI shared memory _only_ and should never be used
  19  * on any other type of memory, including Zorro memory. They are meant to
  20  * access the bus in the bus byte order which is little-endian!.
  21  *
  22  * readX/writeX() are used to access memory mapped devices. On some
  23  * architectures the memory mapped IO stuff needs to be accessed
  24  * differently. On the m68k architecture, we just read/write the
  25  * memory location directly.
  26  */
  27 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
  28  * two accesses to memory, which may be undesireable for some devices.
  29  */
  30
  31 /*
  32  * swap functions are sometimes needed to interface little-endian hardware
  33  */
  34
  35 static inline unsigned short _swapw(volatile unsigned short v)
  36 {
  37 #ifndef H8300_IO_NOSWAP
  38         unsigned short r;
  39         __asm__("xor.b %w0,%x0\n\t"
  40                 "xor.b %x0,%w0\n\t"
  41                 "xor.b %w0,%x0"
  42                 :"=r"(r)
  43                 :"0"(v));
  44         return r;
  45 #else
  46         return v;
  47 #endif
  48 }
  49
  50 static inline unsigned long _swapl(volatile unsigned long v)
  51 {
  52 #ifndef H8300_IO_NOSWAP
  53         unsigned long r;
  54         __asm__("xor.b %w0,%x0\n\t"
  55                 "xor.b %x0,%w0\n\t"
  56                 "xor.b %w0,%x0\n\t"
  57                 "xor.w %e0,%f0\n\t"
  58                 "xor.w %f0,%e0\n\t"
  59                 "xor.w %e0,%f0\n\t"
  60                 "xor.b %w0,%x0\n\t"
  61                 "xor.b %x0,%w0\n\t"
  62                 "xor.b %w0,%x0"
  63                 :"=r"(r)
  64                 :"0"(v));
  65         return r;
  66 #else
  67         return v;
  68 #endif
  69 }
  70
  71 #define readb(addr) \
  72     ({ unsigned char __v = \
  73      *(volatile unsigned char *)((unsigned long)(addr) & 0x00ffffff); \
  74      __v; })
  75 #define readw(addr) \
  76     ({ unsigned short __v = \
  77      *(volatile unsigned short *)((unsigned long)(addr) & 0x00ffffff); \
  78      __v; })
  79 #define readl(addr) \
  80     ({ unsigned long __v = \
  81      *(volatile unsigned long *)((unsigned long)(addr) & 0x00ffffff); \
  82      __v; })
  83
  84 #define writeb(b,addr) (void)((*(volatile unsigned char *) \
  85                              ((unsigned long)(addr) & 0x00ffffff)) = (b))
  86 #define writew(b,addr) (void)((*(volatile unsigned short *) \
  87                              ((unsigned long)(addr) & 0x00ffffff)) = (b))
  88 #define writel(b,addr) (void)((*(volatile unsigned long *) \
  89                              ((unsigned long)(addr) & 0x00ffffff)) = (b))
  90 #define readb_relaxed(addr) readb(addr)
  91 #define readw_relaxed(addr) readw(addr)
  92 #define readl_relaxed(addr) readl(addr)
  93
  94 #define __raw_readb readb
  95 #define __raw_readw readw
  96 #define __raw_readl readl
  97 #define __raw_writeb writeb
  98 #define __raw_writew writew
  99 #define __raw_writel writel
 100
 101 static inline int h8300_buswidth(unsigned int addr)
 102 {
 103         return (*(volatile unsigned char *)ABWCR & (1 << ((addr >> 21) & 7))) == 0;
 104 }
 105
 106 static inline void io_outsb(unsigned int addr, const void *buf, int len)
 107 {
 108         volatile unsigned char  *ap_b = (volatile unsigned char *) addr;
 109         volatile unsigned short *ap_w = (volatile unsigned short *) addr;
 110         unsigned char *bp = (unsigned char *) buf;
 111
 112         if(h8300_buswidth(addr) && (addr & 1)) {
 113                 while (len--)
 114                         *ap_w = *bp++;
 115         } else {
 116                 while (len--)
 117                         *ap_b = *bp++;
 118         }
 119 }
 120
 121 static inline void io_outsw(unsigned int addr, const void *buf, int len)
 122 {
 123         volatile unsigned short *ap = (volatile unsigned short *) addr;
 124         unsigned short *bp = (unsigned short *) buf;
 125         while (len--)
 126                 *ap = _swapw(*bp++);
 127 }
 128
 129 static inline void io_outsl(unsigned int addr, const void *buf, int len)
 130 {
 131         volatile unsigned long *ap = (volatile unsigned long *) addr;
 132         unsigned long *bp = (unsigned long *) buf;
 133         while (len--)
 134                 *ap = _swapl(*bp++);
 135 }
 136
 137 static inline void io_outsw_noswap(unsigned int addr, const void *buf, int len)
 138 {
 139         volatile unsigned short *ap = (volatile unsigned short *) addr;
 140         unsigned short *bp = (unsigned short *) buf;
 141         while (len--)
 142                 *ap = *bp++;
 143 }
 144
 145 static inline void io_outsl_noswap(unsigned int addr, const void *buf, int len)
 146 {
 147         volatile unsigned long *ap = (volatile unsigned long *) addr;
 148         unsigned long *bp = (unsigned long *) buf;
 149         while (len--)
 150                 *ap = *bp++;
 151 }
 152
 153 static inline void io_insb(unsigned int addr, void *buf, int len)
 154 {
 155         volatile unsigned char  *ap_b;
 156         volatile unsigned short *ap_w;
 157         unsigned char *bp = (unsigned char *) buf;
 158
 159         if(h8300_buswidth(addr)) {
 160                 ap_w = (volatile unsigned short *)(addr & ~1);
 161                 while (len--)
 162                         *bp++ = *ap_w & 0xff;
 163         } else {
 164                 ap_b = (volatile unsigned char *)addr;
 165                 while (len--)
 166                         *bp++ = *ap_b;
 167         }
 168 }
 169
 170 static inline void io_insw(unsigned int addr, void *buf, int len)
 171 {
 172         volatile unsigned short *ap = (volatile unsigned short *) addr;
 173         unsigned short *bp = (unsigned short *) buf;
 174         while (len--)
 175                 *bp++ = _swapw(*ap);
 176 }
 177
 178 static inline void io_insl(unsigned int addr, void *buf, int len)
 179 {
 180         volatile unsigned long *ap = (volatile unsigned long *) addr;
 181         unsigned long *bp = (unsigned long *) buf;
 182         while (len--)
 183                 *bp++ = _swapl(*ap);
 184 }
 185
 186 static inline void io_insw_noswap(unsigned int addr, void *buf, int len)
 187 {
 188         volatile unsigned short *ap = (volatile unsigned short *) addr;
 189         unsigned short *bp = (unsigned short *) buf;
 190         while (len--)
 191                 *bp++ = *ap;
 192 }
 193
 194 static inline void io_insl_noswap(unsigned int addr, void *buf, int len)
 195 {
 196         volatile unsigned long *ap = (volatile unsigned long *) addr;
 197         unsigned long *bp = (unsigned long *) buf;
 198         while (len--)
 199                 *bp++ = *ap;
 200 }
 201
 202 /*
 203  *      make the short names macros so specific devices
 204  *      can override them as required
 205  */
 206
 207 #define memset_io(a,b,c)        memset((void *)(a),(b),(c))
 208 #define memcpy_fromio(a,b,c)    memcpy((a),(void *)(b),(c))
 209 #define memcpy_toio(a,b,c)      memcpy((void *)(a),(b),(c))
 210
 211 #define mmiowb()
 212
 213 #define inb(addr)    ((h8300_buswidth(addr))?readw((addr) & ~1) & 0xff:readb(addr))
 214 #define inw(addr)    _swapw(readw(addr))
 215 #define inl(addr)    _swapl(readl(addr))
 216 #define outb(x,addr) ((void)((h8300_buswidth(addr) && \
 217                       ((addr) & 1))?writew(x,(addr) & ~1):writeb(x,addr)))
 218 #define outw(x,addr) ((void) writew(_swapw(x),addr))
 219 #define outl(x,addr) ((void) writel(_swapl(x),addr))
 220
 221 #define inb_p(addr)    inb(addr)
 222 #define inw_p(addr)    inw(addr)
 223 #define inl_p(addr)    inl(addr)
 224 #define outb_p(x,addr) outb(x,addr)
 225 #define outw_p(x,addr) outw(x,addr)
 226 #define outl_p(x,addr) outl(x,addr)
 227
 228 #define outsb(a,b,l) io_outsb(a,b,l)
 229 #define outsw(a,b,l) io_outsw(a,b,l)
 230 #define outsl(a,b,l) io_outsl(a,b,l)
 231
 232 #define insb(a,b,l) io_insb(a,b,l)
 233 #define insw(a,b,l) io_insw(a,b,l)
 234 #define insl(a,b,l) io_insl(a,b,l)
 235
 236 #define IO_SPACE_LIMIT 0xffffff
 237
 238
 239 /* Values for nocacheflag and cmode */
 240 #define IOMAP_FULL_CACHING              0
 241 #define IOMAP_NOCACHE_SER               1
 242 #define IOMAP_NOCACHE_NONSER            2
 243 #define IOMAP_WRITETHROUGH              3
 244
 245 extern void *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag);
 246 extern void __iounmap(void *addr, unsigned long size);
 247
 248 static inline void *ioremap(unsigned long physaddr, unsigned long size)
 249 {
 250         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 251 }
 252 static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
 253 {
 254         return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
 255 }
 256 static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size)
 257 {
 258         return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
 259 }
 260 static inline void *ioremap_fullcache(unsigned long physaddr, unsigned long size)
 261 {
 262         return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
 263 }
 264
 265 extern void iounmap(void *addr);
 266
 267 /* Nothing to do */
 268
 269 #define dma_cache_inv(_start,_size)             do { } while (0)
 270 #define dma_cache_wback(_start,_size)           do { } while (0)
 271 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 272
 273 /* H8/300 internal I/O functions */
 274 static __inline__ unsigned char ctrl_inb(unsigned long addr)
 275 {
 276         return *(volatile unsigned char*)addr;
 277 }
 278
 279 static __inline__ unsigned short ctrl_inw(unsigned long addr)
 280 {
 281         return *(volatile unsigned short*)addr;
 282 }
 283
 284 static __inline__ unsigned long ctrl_inl(unsigned long addr)
 285 {
 286         return *(volatile unsigned long*)addr;
 287 }
 288
 289 static __inline__ void ctrl_outb(unsigned char b, unsigned long addr)
 290 {
 291         *(volatile unsigned char*)addr = b;
 292 }
 293
 294 static __inline__ void ctrl_outw(unsigned short b, unsigned long addr)
 295 {
 296         *(volatile unsigned short*)addr = b;
 297 }
 298
 299 static __inline__ void ctrl_outl(unsigned long b, unsigned long addr)
 300 {
 301         *(volatile unsigned long*)addr = b;
 302 }
 303
 304 /* Pages to physical address... */
 305 #define page_to_phys(page)      ((page - mem_map) << PAGE_SHIFT)
 306 #define page_to_bus(page)       ((page - mem_map) << PAGE_SHIFT)
 307
 308 /*
 309  * Macros used for converting between virtual and physical mappings.
 310  */
 311 #define mm_ptov(vaddr)          ((void *) (vaddr))
 312 #define mm_vtop(vaddr)          ((unsigned long) (vaddr))
 313 #define phys_to_virt(vaddr)     ((void *) (vaddr))
 314 #define virt_to_phys(vaddr)     ((unsigned long) (vaddr))
 315
 316 #define virt_to_bus virt_to_phys
 317 #define bus_to_virt phys_to_virt
 318
 319 /*
 320  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 321  * access
 322  */
 323 #define xlate_dev_mem_ptr(p)    __va(p)
 324
 325 /*
 326  * Convert a virtual cached pointer to an uncached pointer
 327  */
 328 #define xlate_dev_kmem_ptr(p)   p
 329
 330 #endif /* __KERNEL__ */
 331
 332 #endif /* _H8300_IO_H */