include/asm-sparc/io.h

   1 /*
   2  * $Id: io.h,v 1.30 2001/12/21 01:23:21 davem Exp $
   3  */
   4 #ifndef __SPARC_IO_H
   5 #define __SPARC_IO_H
   6
   7 #include <linux/kernel.h>
   8 #include <linux/types.h>
   9 #include <linux/ioport.h>  /* struct resource */
  10
  11 #include <asm/page.h>      /* IO address mapping routines need this */
  12 #include <asm/system.h>
  13
  14 #define page_to_phys(page)      (((page) - mem_map) << PAGE_SHIFT)
  15
  16 static inline u32 flip_dword (u32 l)
  17 {
  18         return ((l&0xff)<<24) | (((l>>8)&0xff)<<16) | (((l>>16)&0xff)<<8)| ((l>>24)&0xff);
  19 }
  20
  21 static inline u16 flip_word (u16 w)
  22 {
  23         return ((w&0xff) << 8) | ((w>>8)&0xff);
  24 }
  25
  26 #define mmiowb()
  27
  28 /*
  29  * Memory mapped I/O to PCI
  30  */
  31
  32 static inline u8 __raw_readb(const volatile void __iomem *addr)
  33 {
  34         return *(__force volatile u8 *)addr;
  35 }
  36
  37 static inline u16 __raw_readw(const volatile void __iomem *addr)
  38 {
  39         return *(__force volatile u16 *)addr;
  40 }
  41
  42 static inline u32 __raw_readl(const volatile void __iomem *addr)
  43 {
  44         return *(__force volatile u32 *)addr;
  45 }
  46
  47 static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
  48 {
  49         *(__force volatile u8 *)addr = b;
  50 }
  51
  52 static inline void __raw_writew(u16 w, volatile void __iomem *addr)
  53 {
  54         *(__force volatile u16 *)addr = w;
  55 }
  56
  57 static inline void __raw_writel(u32 l, volatile void __iomem *addr)
  58 {
  59         *(__force volatile u32 *)addr = l;
  60 }
  61
  62 static inline u8 __readb(const volatile void __iomem *addr)
  63 {
  64         return *(__force volatile u8 *)addr;
  65 }
  66
  67 static inline u16 __readw(const volatile void __iomem *addr)
  68 {
  69         return flip_word(*(__force volatile u16 *)addr);
  70 }
  71
  72 static inline u32 __readl(const volatile void __iomem *addr)
  73 {
  74         return flip_dword(*(__force volatile u32 *)addr);
  75 }
  76
  77 static inline void __writeb(u8 b, volatile void __iomem *addr)
  78 {
  79         *(__force volatile u8 *)addr = b;
  80 }
  81
  82 static inline void __writew(u16 w, volatile void __iomem *addr)
  83 {
  84         *(__force volatile u16 *)addr = flip_word(w);
  85 }
  86
  87 static inline void __writel(u32 l, volatile void __iomem *addr)
  88 {
  89         *(__force volatile u32 *)addr = flip_dword(l);
  90 }
  91
  92 #define readb(__addr)           __readb(__addr)
  93 #define readw(__addr)           __readw(__addr)
  94 #define readl(__addr)           __readl(__addr)
  95 #define readb_relaxed(__addr)   readb(__addr)
  96 #define readw_relaxed(__addr)   readw(__addr)
  97 #define readl_relaxed(__addr)   readl(__addr)
  98
  99 #define writeb(__b, __addr)     __writeb((__b),(__addr))
 100 #define writew(__w, __addr)     __writew((__w),(__addr))
 101 #define writel(__l, __addr)     __writel((__l),(__addr))
 102
 103 /*
 104  * I/O space operations
 105  *
 106  * Arrangement on a Sun is somewhat complicated.
 107  *
 108  * First of all, we want to use standard Linux drivers
 109  * for keyboard, PC serial, etc. These drivers think
 110  * they access I/O space and use inb/outb.
 111  * On the other hand, EBus bridge accepts PCI *memory*
 112  * cycles and converts them into ISA *I/O* cycles.
 113  * Ergo, we want inb & outb to generate PCI memory cycles.
 114  *
 115  * If we want to issue PCI *I/O* cycles, we do this
 116  * with a low 64K fixed window in PCIC. This window gets
 117  * mapped somewhere into virtual kernel space and we
 118  * can use inb/outb again.
 119  */
 120 #define inb_local(__addr)       __readb((void __iomem *)(unsigned long)(__addr))
 121 #define inb(__addr)             __readb((void __iomem *)(unsigned long)(__addr))
 122 #define inw(__addr)             __readw((void __iomem *)(unsigned long)(__addr))
 123 #define inl(__addr)             __readl((void __iomem *)(unsigned long)(__addr))
 124
 125 #define outb_local(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
 126 #define outb(__b, __addr)       __writeb(__b, (void __iomem *)(unsigned long)(__addr))
 127 #define outw(__w, __addr)       __writew(__w, (void __iomem *)(unsigned long)(__addr))
 128 #define outl(__l, __addr)       __writel(__l, (void __iomem *)(unsigned long)(__addr))
 129
 130 #define inb_p(__addr)           inb(__addr)
 131 #define outb_p(__b, __addr)     outb(__b, __addr)
 132 #define inw_p(__addr)           inw(__addr)
 133 #define outw_p(__w, __addr)     outw(__w, __addr)
 134 #define inl_p(__addr)           inl(__addr)
 135 #define outl_p(__l, __addr)     outl(__l, __addr)
 136
 137 void outsb(unsigned long addr, const void *src, unsigned long cnt);
 138 void outsw(unsigned long addr, const void *src, unsigned long cnt);
 139 void outsl(unsigned long addr, const void *src, unsigned long cnt);
 140 void insb(unsigned long addr, void *dst, unsigned long count);
 141 void insw(unsigned long addr, void *dst, unsigned long count);
 142 void insl(unsigned long addr, void *dst, unsigned long count);
 143
 144 #define IO_SPACE_LIMIT 0xffffffff
 145
 146 /*
 147  * SBus accessors.
 148  *
 149  * SBus has only one, memory mapped, I/O space.
 150  * We do not need to flip bytes for SBus of course.
 151  */
 152 static inline u8 _sbus_readb(const volatile void __iomem *addr)
 153 {
 154         return *(__force volatile u8 *)addr;
 155 }
 156
 157 static inline u16 _sbus_readw(const volatile void __iomem *addr)
 158 {
 159         return *(__force volatile u16 *)addr;
 160 }
 161
 162 static inline u32 _sbus_readl(const volatile void __iomem *addr)
 163 {
 164         return *(__force volatile u32 *)addr;
 165 }
 166
 167 static inline void _sbus_writeb(u8 b, volatile void __iomem *addr)
 168 {
 169         *(__force volatile u8 *)addr = b;
 170 }
 171
 172 static inline void _sbus_writew(u16 w, volatile void __iomem *addr)
 173 {
 174         *(__force volatile u16 *)addr = w;
 175 }
 176
 177 static inline void _sbus_writel(u32 l, volatile void __iomem *addr)
 178 {
 179         *(__force volatile u32 *)addr = l;
 180 }
 181
 182 /*
 183  * The only reason for #define's is to hide casts to unsigned long.
 184  */
 185 #define sbus_readb(__addr)              _sbus_readb(__addr)
 186 #define sbus_readw(__addr)              _sbus_readw(__addr)
 187 #define sbus_readl(__addr)              _sbus_readl(__addr)
 188 #define sbus_writeb(__b, __addr)        _sbus_writeb(__b, __addr)
 189 #define sbus_writew(__w, __addr)        _sbus_writew(__w, __addr)
 190 #define sbus_writel(__l, __addr)        _sbus_writel(__l, __addr)
 191
 192 static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n)
 193 {
 194         while(n--) {
 195                 sbus_writeb(c, __dst);
 196                 __dst++;
 197         }
 198 }
 199
 200 static inline void
 201 _memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
 202 {
 203         volatile void __iomem *d = dst;
 204
 205         while (n--) {
 206                 writeb(c, d);
 207                 d++;
 208         }
 209 }
 210
 211 #define memset_io(d,c,sz)       _memset_io(d,c,sz)
 212
 213 static inline void
 214 _memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n)
 215 {
 216         char *d = dst;
 217
 218         while (n--) {
 219                 char tmp = readb(src);
 220                 *d++ = tmp;
 221                 src++;
 222         }
 223 }
 224
 225 #define memcpy_fromio(d,s,sz)   _memcpy_fromio(d,s,sz)
 226
 227 static inline void
 228 _memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n)
 229 {
 230         const char *s = src;
 231         volatile void __iomem *d = dst;
 232
 233         while (n--) {
 234                 char tmp = *s++;
 235                 writeb(tmp, d);
 236                 d++;
 237         }
 238 }
 239
 240 #define memcpy_toio(d,s,sz)     _memcpy_toio(d,s,sz)
 241
 242 #ifdef __KERNEL__
 243
 244 /*
 245  * Bus number may be embedded in the higher bits of the physical address.
 246  * This is why we have no bus number argument to ioremap().
 247  */
 248 extern void __iomem *ioremap(unsigned long offset, unsigned long size);
 249 #define ioremap_nocache(X,Y)    ioremap((X),(Y))
 250 extern void iounmap(volatile void __iomem *addr);
 251
 252 /*
 253  * Bus number may be in res->flags... somewhere.
 254  */
 255 extern void __iomem *sbus_ioremap(struct resource *res, unsigned long offset,
 256     unsigned long size, char *name);
 257 extern void sbus_iounmap(volatile void __iomem *vaddr, unsigned long size);
 258
 259
 260 /*
 261  * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
 262  * so rtc_port is static in it. This should not change unless a new
 263  * hardware pops up.
 264  */
 265 #define RTC_PORT(x)   (rtc_port + (x))
 266 #define RTC_ALWAYS_BCD  0
 267
 268 /* Nothing to do */
 269 /* P3: Only IDE DMA may need these. XXX Verify that it still does... */
 270
 271 #define dma_cache_inv(_start,_size)             do { } while (0)
 272 #define dma_cache_wback(_start,_size)           do { } while (0)
 273 #define dma_cache_wback_inv(_start,_size)       do { } while (0)
 274
 275 #endif
 276
 277 #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED          1
 278
 279 /*
 280  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 281  * access
 282  */
 283 #define xlate_dev_mem_ptr(p)    __va(p)
 284
 285 /*
 286  * Convert a virtual cached pointer to an uncached pointer
 287  */
 288 #define xlate_dev_kmem_ptr(p)   p
 289
 290 #endif /* !(__SPARC_IO_H) */