include/asm-parisc/io.h

   1 #ifndef _ASM_IO_H
   2 #define _ASM_IO_H
   3
   4 #include <linux/types.h>
   5 #include <asm/pgtable.h>
   6
   7 extern unsigned long parisc_vmerge_boundary;
   8 extern unsigned long parisc_vmerge_max_size;
   9
  10 #define BIO_VMERGE_BOUNDARY     parisc_vmerge_boundary
  11 #define BIO_VMERGE_MAX_SIZE     parisc_vmerge_max_size
  12
  13 #define virt_to_phys(a) ((unsigned long)__pa(a))
  14 #define phys_to_virt(a) __va(a)
  15 #define virt_to_bus virt_to_phys
  16 #define bus_to_virt phys_to_virt
  17
  18 /*
  19  * Memory mapped I/O
  20  *
  21  * readX()/writeX() do byteswapping and take an ioremapped address
  22  * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
  23  * gsc_*() don't byteswap and operate on physical addresses;
  24  *   eg dev->hpa or 0xfee00000.
  25  */
  26
  27 static inline unsigned char gsc_readb(unsigned long addr)
  28 {
  29         long flags;
  30         unsigned char ret;
  31
  32         __asm__ __volatile__(
  33         "       rsm     2,%0\n"
  34         "       ldbx    0(%2),%1\n"
  35         "       mtsm    %0\n"
  36         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  37
  38         return ret;
  39 }
  40
  41 static inline unsigned short gsc_readw(unsigned long addr)
  42 {
  43         long flags;
  44         unsigned short ret;
  45
  46         __asm__ __volatile__(
  47         "       rsm     2,%0\n"
  48         "       ldhx    0(%2),%1\n"
  49         "       mtsm    %0\n"
  50         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  51
  52         return ret;
  53 }
  54
  55 static inline unsigned int gsc_readl(unsigned long addr)
  56 {
  57         u32 ret;
  58
  59         __asm__ __volatile__(
  60         "       ldwax   0(%1),%0\n"
  61         : "=r" (ret) : "r" (addr) );
  62
  63         return ret;
  64 }
  65
  66 static inline unsigned long long gsc_readq(unsigned long addr)
  67 {
  68         unsigned long long ret;
  69
  70 #ifdef __LP64__
  71         __asm__ __volatile__(
  72         "       ldda    0(%1),%0\n"
  73         :  "=r" (ret) : "r" (addr) );
  74 #else
  75         /* two reads may have side effects.. */
  76         ret = ((u64) gsc_readl(addr)) << 32;
  77         ret |= gsc_readl(addr+4);
  78 #endif
  79         return ret;
  80 }
  81
  82 static inline void gsc_writeb(unsigned char val, unsigned long addr)
  83 {
  84         long flags;
  85         __asm__ __volatile__(
  86         "       rsm     2,%0\n"
  87         "       stbs    %1,0(%2)\n"
  88         "       mtsm    %0\n"
  89         : "=&r" (flags) :  "r" (val), "r" (addr) );
  90 }
  91
  92 static inline void gsc_writew(unsigned short val, unsigned long addr)
  93 {
  94         long flags;
  95         __asm__ __volatile__(
  96         "       rsm     2,%0\n"
  97         "       sths    %1,0(%2)\n"
  98         "       mtsm    %0\n"
  99         : "=&r" (flags) :  "r" (val), "r" (addr) );
 100 }
 101
 102 static inline void gsc_writel(unsigned int val, unsigned long addr)
 103 {
 104         __asm__ __volatile__(
 105         "       stwas   %0,0(%1)\n"
 106         : :  "r" (val), "r" (addr) );
 107 }
 108
 109 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
 110 {
 111 #ifdef __LP64__
 112         __asm__ __volatile__(
 113         "       stda    %0,0(%1)\n"
 114         : :  "r" (val), "r" (addr) );
 115 #else
 116         /* two writes may have side effects.. */
 117         gsc_writel(val >> 32, addr);
 118         gsc_writel(val, addr+4);
 119 #endif
 120 }
 121
 122 /*
 123  * The standard PCI ioremap interfaces
 124  */
 125
 126 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 127
 128 /* Most machines react poorly to I/O-space being cacheable... Instead let's
 129  * define ioremap() in terms of ioremap_nocache().
 130  */
 131 extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 132 {
 133         return __ioremap(offset, size, _PAGE_NO_CACHE);
 134 }
 135 #define ioremap_nocache(off, sz)        ioremap((off), (sz))
 136
 137 extern void iounmap(void __iomem *addr);
 138
 139 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 140 {
 141         return (*(volatile unsigned char __force *) (addr));
 142 }
 143 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 144 {
 145         return *(volatile unsigned short __force *) addr;
 146 }
 147 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 148 {
 149         return *(volatile unsigned int __force *) addr;
 150 }
 151 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 152 {
 153         return *(volatile unsigned long long __force *) addr;
 154 }
 155
 156 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 157 {
 158         *(volatile unsigned char __force *) addr = b;
 159 }
 160 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 161 {
 162         *(volatile unsigned short __force *) addr = b;
 163 }
 164 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 165 {
 166         *(volatile unsigned int __force *) addr = b;
 167 }
 168 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 169 {
 170         *(volatile unsigned long long __force *) addr = b;
 171 }
 172
 173 /* readb can never be const, so use __fswab instead of le*_to_cpu */
 174 #define readb(addr) __raw_readb(addr)
 175 #define readw(addr) __fswab16(__raw_readw(addr))
 176 #define readl(addr) __fswab32(__raw_readl(addr))
 177 #define readq(addr) __fswab64(__raw_readq(addr))
 178 #define writeb(b, addr) __raw_writeb(b, addr)
 179 #define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
 180 #define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
 181 #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
 182
 183 #define readb_relaxed(addr) readb(addr)
 184 #define readw_relaxed(addr) readw(addr)
 185 #define readl_relaxed(addr) readl(addr)
 186 #define readq_relaxed(addr) readq(addr)
 187
 188 #define mmiowb() do { } while (0)
 189
 190 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 191 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 192 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 193
 194 /*
 195  * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and
 196  * just copy it. The net code will then do the checksum later. Presently
 197  * only used by some shared memory 8390 Ethernet cards anyway.
 198  */
 199
 200 #define eth_io_copy_and_sum(skb,src,len,unused) \
 201   memcpy_fromio((skb)->data,(src),(len))
 202
 203 /* Port-space IO */
 204
 205 #define inb_p inb
 206 #define inw_p inw
 207 #define inl_p inl
 208 #define outb_p outb
 209 #define outw_p outw
 210 #define outl_p outl
 211
 212 extern unsigned char eisa_in8(unsigned short port);
 213 extern unsigned short eisa_in16(unsigned short port);
 214 extern unsigned int eisa_in32(unsigned short port);
 215 extern void eisa_out8(unsigned char data, unsigned short port);
 216 extern void eisa_out16(unsigned short data, unsigned short port);
 217 extern void eisa_out32(unsigned int data, unsigned short port);
 218
 219 #if defined(CONFIG_PCI)
 220 extern unsigned char inb(int addr);
 221 extern unsigned short inw(int addr);
 222 extern unsigned int inl(int addr);
 223
 224 extern void outb(unsigned char b, int addr);
 225 extern void outw(unsigned short b, int addr);
 226 extern void outl(unsigned int b, int addr);
 227 #elif defined(CONFIG_EISA)
 228 #define inb eisa_in8
 229 #define inw eisa_in16
 230 #define inl eisa_in32
 231 #define outb eisa_out8
 232 #define outw eisa_out16
 233 #define outl eisa_out32
 234 #else
 235 static inline char inb(unsigned long addr)
 236 {
 237         BUG();
 238         return -1;
 239 }
 240
 241 static inline short inw(unsigned long addr)
 242 {
 243         BUG();
 244         return -1;
 245 }
 246
 247 static inline int inl(unsigned long addr)
 248 {
 249         BUG();
 250         return -1;
 251 }
 252
 253 #define outb(x, y)      BUG()
 254 #define outw(x, y)      BUG()
 255 #define outl(x, y)      BUG()
 256 #endif
 257
 258 /*
 259  * String versions of in/out ops:
 260  */
 261 extern void insb (unsigned long port, void *dst, unsigned long count);
 262 extern void insw (unsigned long port, void *dst, unsigned long count);
 263 extern void insl (unsigned long port, void *dst, unsigned long count);
 264 extern void outsb (unsigned long port, const void *src, unsigned long count);
 265 extern void outsw (unsigned long port, const void *src, unsigned long count);
 266 extern void outsl (unsigned long port, const void *src, unsigned long count);
 267
 268
 269 /* IO Port space is :      BBiiii   where BB is HBA number. */
 270 #define IO_SPACE_LIMIT 0x00ffffff
 271
 272
 273 #define dma_cache_inv(_start,_size)             do { flush_kernel_dcache_range(_start,_size); } while (0)
 274 #define dma_cache_wback(_start,_size)           do { flush_kernel_dcache_range(_start,_size); } while (0)
 275 #define dma_cache_wback_inv(_start,_size)       do { flush_kernel_dcache_range(_start,_size); } while (0)
 276
 277 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 278  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 279  * mode (essentially just sign extending.  This macro takes in a 32
 280  * bit I/O address (still with the leading f) and outputs the correct
 281  * value for either 32 or 64 bit mode */
 282 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 283
 284 #include <asm-generic/iomap.h>
 285
 286 /*
 287  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 288  * access
 289  */
 290 #define xlate_dev_mem_ptr(p)    __va(p)
 291
 292 /*
 293  * Convert a virtual cached pointer to an uncached pointer
 294  */
 295 #define xlate_dev_kmem_ptr(p)   p
 296
 297 #endif