arch/sparc/include/asm/io_32.h

   1 #ifndef __SPARC_IO_H
   2 #define __SPARC_IO_H
   3
   4 #include <linux/kernel.h>
   5 #include <linux/types.h>
   6 #include <linux/ioport.h>  /* struct resource */
   7
   8 #include <asm/page.h>      /* IO address mapping routines need this */
   9 #include <asm/system.h>
  10
  11 #define page_to_phys(page)      (((page) - mem_map) << PAGE_SHIFT)
  12
  13 static inline u32 flip_dword (u32 l)
  14 {
  15         return ((l&0xff)<<24) | (((l>>8)&0xff)<<16) | (((l>>16)&0xff)<<8)| ((l>>24)&0xff);
  16 }
  17
  18 static inline u16 flip_word (u16 w)
  19 {
  20         return ((w&0xff) << 8) | ((w>>8)&0xff);
  21 }
  22
  23 #define mmiowb()
  24
  25 /*
  26  * Memory mapped I/O to PCI
  27  */
  28
  29 static inline u8 __raw_readb(const volatile void __iomem *addr)
  30 {
  31         return *(__force volatile u8 *)addr;
  32 }
  33
  34 static inline u16 __raw_readw(const volatile void __iomem *addr)
  35 {
  36         return *(__force volatile u16 *)addr;
  37 }
  38
  39 static inline u32 __raw_readl(const volatile void __iomem *addr)
  40 {
  41         return *(__force volatile u32 *)addr;
  42 }
  43
  44 static inline void __raw_writeb(u8 b, volatile void __iomem *addr)
  45 {
  46         *(__force volatile u8 *)addr = b;
  47 }
  48
  49 static inline void __raw_writew(u16 w, volatile void __iomem *addr)
  50 {
  51         *(__force volatile u16 *)addr = w;
  52 }
  53
  54 static inline void __raw_writel(u32 l, volatile void __iomem *addr)
  55 {
  56         *(__force volatile u32 *)addr = l;
  57 }
  58
  59 static inline u8 __readb(const volatile void __iomem *addr)
  60 {
  61         return *(__force volatile u8 *)addr;
  62 }
  63
  64 static inline u16 __readw(const volatile void __iomem *addr)
  65 {
  66         return flip_word(*(__force volatile u16 *)addr);
  67 }
  68
  69 static inline u32 __readl(const volatile void __iomem *addr)
  70 {
  71         return flip_dword(*(__force volatile u32 *)addr);
  72 }
  73
  74 static inline void __writeb(u8 b, volatile void __iomem *addr)
  75 {
  76         *(__force volatile u8 *)addr = b;
  77 }
  78
  79 static inline void __writew(u16 w, volatile void __iomem *addr)
  80 {
  81         *(__force volatile u16 *)addr = flip_word(w);
  82 }
  83
  84 static inline void __writel(u32 l, volatile void __iomem *addr)
  85 {
  86         *(__force volatile u32 *)addr = flip_dword(l);
  87 }
  88
  89 #define readb(__addr)           __readb(__addr)
  90 #define readw(__addr)           __readw(__addr)
  91 #define readl(__addr)           __readl(__addr)
  92 #define readb_relaxed(__addr)   readb(__addr)
  93 #define readw_relaxed(__addr)   readw(__addr)
  94 #define readl_relaxed(__addr)   readl(__addr)
  95
  96 #define writeb(__b, __addr)     __writeb((__b),(__addr))
  97 #define writew(__w, __addr)     __writew((__w),(__addr))
  98 #define writel(__l, __addr)     __writel((__l),(__addr))
  99
 100 /*
 101  * I/O space operations
 102  *
 103  * Arrangement on a Sun is somewhat complicated.
 104  *
 105  * First of all, we want to use standard Linux drivers
 106  * for keyboard, PC serial, etc. These drivers think
 107  * they access I/O space and use inb/outb.
 108  * On the other hand, EBus bridge accepts PCI *memory*
 109  * cycles and converts them into ISA *I/O* cycles.
 110  * Ergo, we want inb & outb to generate PCI memory cycles.
 111  *
 112  * If we want to issue PCI *I/O* cycles, we do this
 113  * with a low 64K fixed window in PCIC. This window gets
 114  * mapped somewhere into virtual kernel space and we
 115  * can use inb/outb again.
 116  */
 117 #define inb_local(__addr)       __readb((void __iomem *)(unsigned long)(__addr))
 118 #define inb(__addr)             __readb((void __iomem *)(unsigned long)(__addr))
 119 #define inw(__addr)             __readw((void __iomem *)(unsigned long)(__addr))
 120 #define inl(__addr)             __readl((void __iomem *)(unsigned long)(__addr))
 121
 122 #define outb_local(__b, __addr) __writeb(__b, (void __iomem *)(unsigned long)(__addr))
 123 #define outb(__b, __addr)       __writeb(__b, (void __iomem *)(unsigned long)(__addr))
 124 #define outw(__w, __addr)       __writew(__w, (void __iomem *)(unsigned long)(__addr))
 125 #define outl(__l, __addr)       __writel(__l, (void __iomem *)(unsigned long)(__addr))
 126
 127 #define inb_p(__addr)           inb(__addr)
 128 #define outb_p(__b, __addr)     outb(__b, __addr)
 129 #define inw_p(__addr)           inw(__addr)
 130 #define outw_p(__w, __addr)     outw(__w, __addr)
 131 #define inl_p(__addr)           inl(__addr)
 132 #define outl_p(__l, __addr)     outl(__l, __addr)
 133
 134 void outsb(unsigned long addr, const void *src, unsigned long cnt);
 135 void outsw(unsigned long addr, const void *src, unsigned long cnt);
 136 void outsl(unsigned long addr, const void *src, unsigned long cnt);
 137 void insb(unsigned long addr, void *dst, unsigned long count);
 138 void insw(unsigned long addr, void *dst, unsigned long count);
 139 void insl(unsigned long addr, void *dst, unsigned long count);
 140
 141 #define IO_SPACE_LIMIT 0xffffffff
 142
 143 /*
 144  * SBus accessors.
 145  *
 146  * SBus has only one, memory mapped, I/O space.
 147  * We do not need to flip bytes for SBus of course.
 148  */
 149 static inline u8 _sbus_readb(const volatile void __iomem *addr)
 150 {
 151         return *(__force volatile u8 *)addr;
 152 }
 153
 154 static inline u16 _sbus_readw(const volatile void __iomem *addr)
 155 {
 156         return *(__force volatile u16 *)addr;
 157 }
 158
 159 static inline u32 _sbus_readl(const volatile void __iomem *addr)
 160 {
 161         return *(__force volatile u32 *)addr;
 162 }
 163
 164 static inline void _sbus_writeb(u8 b, volatile void __iomem *addr)
 165 {
 166         *(__force volatile u8 *)addr = b;
 167 }
 168
 169 static inline void _sbus_writew(u16 w, volatile void __iomem *addr)
 170 {
 171         *(__force volatile u16 *)addr = w;
 172 }
 173
 174 static inline void _sbus_writel(u32 l, volatile void __iomem *addr)
 175 {
 176         *(__force volatile u32 *)addr = l;
 177 }
 178
 179 /*
 180  * The only reason for #define's is to hide casts to unsigned long.
 181  */
 182 #define sbus_readb(__addr)              _sbus_readb(__addr)
 183 #define sbus_readw(__addr)              _sbus_readw(__addr)
 184 #define sbus_readl(__addr)              _sbus_readl(__addr)
 185 #define sbus_writeb(__b, __addr)        _sbus_writeb(__b, __addr)
 186 #define sbus_writew(__w, __addr)        _sbus_writew(__w, __addr)
 187 #define sbus_writel(__l, __addr)        _sbus_writel(__l, __addr)
 188
 189 static inline void sbus_memset_io(volatile void __iomem *__dst, int c, __kernel_size_t n)
 190 {
 191         while(n--) {
 192                 sbus_writeb(c, __dst);
 193                 __dst++;
 194         }
 195 }
 196
 197 static inline void
 198 _memset_io(volatile void __iomem *dst, int c, __kernel_size_t n)
 199 {
 200         volatile void __iomem *d = dst;
 201
 202         while (n--) {
 203                 writeb(c, d);
 204                 d++;
 205         }
 206 }
 207
 208 #define memset_io(d,c,sz)       _memset_io(d,c,sz)
 209
 210 static inline void
 211 _memcpy_fromio(void *dst, const volatile void __iomem *src, __kernel_size_t n)
 212 {
 213         char *d = dst;
 214
 215         while (n--) {
 216                 char tmp = readb(src);
 217                 *d++ = tmp;
 218                 src++;
 219         }
 220 }
 221
 222 #define memcpy_fromio(d,s,sz)   _memcpy_fromio(d,s,sz)
 223
 224 static inline void
 225 _memcpy_toio(volatile void __iomem *dst, const void *src, __kernel_size_t n)
 226 {
 227         const char *s = src;
 228         volatile void __iomem *d = dst;
 229
 230         while (n--) {
 231                 char tmp = *s++;
 232                 writeb(tmp, d);
 233                 d++;
 234         }
 235 }
 236
 237 #define memcpy_toio(d,s,sz)     _memcpy_toio(d,s,sz)
 238
 239 #ifdef __KERNEL__
 240
 241 /*
 242  * Bus number may be embedded in the higher bits of the physical address.
 243  * This is why we have no bus number argument to ioremap().
 244  */
 245 extern void __iomem *ioremap(unsigned long offset, unsigned long size);
 246 #define ioremap_nocache(X,Y)    ioremap((X),(Y))
 247 #define ioremap_wc(X,Y)         ioremap((X),(Y))
 248 extern void iounmap(volatile void __iomem *addr);
 249
 250 #define ioread8(X)                      readb(X)
 251 #define ioread16(X)                     readw(X)
 252 #define ioread32(X)                     readl(X)
 253 #define iowrite8(val,X)                 writeb(val,X)
 254 #define iowrite16(val,X)                writew(val,X)
 255 #define iowrite32(val,X)                writel(val,X)
 256
 257 static inline void ioread8_rep(void __iomem *port, void *buf, unsigned long count)
 258 {
 259         insb((unsigned long __force)port, buf, count);
 260 }
 261 static inline void ioread16_rep(void __iomem *port, void *buf, unsigned long count)
 262 {
 263         insw((unsigned long __force)port, buf, count);
 264 }
 265
 266 static inline void ioread32_rep(void __iomem *port, void *buf, unsigned long count)
 267 {
 268         insl((unsigned long __force)port, buf, count);
 269 }
 270
 271 static inline void iowrite8_rep(void __iomem *port, const void *buf, unsigned long count)
 272 {
 273         outsb((unsigned long __force)port, buf, count);
 274 }
 275
 276 static inline void iowrite16_rep(void __iomem *port, const void *buf, unsigned long count)
 277 {
 278         outsw((unsigned long __force)port, buf, count);
 279 }
 280
 281 static inline void iowrite32_rep(void __iomem *port, const void *buf, unsigned long count)
 282 {
 283         outsl((unsigned long __force)port, buf, count);
 284 }
 285
 286 /* Create a virtual mapping cookie for an IO port range */
 287 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
 288 extern void ioport_unmap(void __iomem *);
 289
 290 /* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
 291 struct pci_dev;
 292 extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
 293 extern void pci_iounmap(struct pci_dev *dev, void __iomem *);
 294
 295 /*
 296  * At the moment, we do not use CMOS_READ anywhere outside of rtc.c,
 297  * so rtc_port is static in it. This should not change unless a new
 298  * hardware pops up.
 299  */
 300 #define RTC_PORT(x)   (rtc_port + (x))
 301 #define RTC_ALWAYS_BCD  0
 302
 303 static inline int sbus_can_dma_64bit(void)
 304 {
 305         return 0; /* actually, sparc_cpu_model==sun4d */
 306 }
 307 static inline int sbus_can_burst64(void)
 308 {
 309         return 0; /* actually, sparc_cpu_model==sun4d */
 310 }
 311 struct device;
 312 extern void sbus_set_sbus64(struct device *, int);
 313
 314 #endif
 315
 316 #define __ARCH_HAS_NO_PAGE_ZERO_MAPPED          1
 317
 318 /*
 319  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 320  * access
 321  */
 322 #define xlate_dev_mem_ptr(p)    __va(p)
 323
 324 /*
 325  * Convert a virtual cached pointer to an uncached pointer
 326  */
 327 #define xlate_dev_kmem_ptr(p)   p
 328
 329 #endif /* !(__SPARC_IO_H) */