include/asm-parisc/io.h

   1 #ifndef _ASM_IO_H
   2 #define _ASM_IO_H
   3
   4 #include <linux/config.h>
   5 #include <linux/types.h>
   6 #include <asm/pgtable.h>
   7
   8 extern unsigned long parisc_vmerge_boundary;
   9 extern unsigned long parisc_vmerge_max_size;
  10
  11 #define BIO_VMERGE_BOUNDARY     parisc_vmerge_boundary
  12 #define BIO_VMERGE_MAX_SIZE     parisc_vmerge_max_size
  13
  14 #define virt_to_phys(a) ((unsigned long)__pa(a))
  15 #define phys_to_virt(a) __va(a)
  16 #define virt_to_bus virt_to_phys
  17 #define bus_to_virt phys_to_virt
  18
  19 /*
  20  * Memory mapped I/O
  21  *
  22  * readX()/writeX() do byteswapping and take an ioremapped address
  23  * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
  24  * gsc_*() don't byteswap and operate on physical addresses;
  25  *   eg dev->hpa or 0xfee00000.
  26  */
  27
  28 static inline unsigned char gsc_readb(unsigned long addr)
  29 {
  30         long flags;
  31         unsigned char ret;
  32
  33         __asm__ __volatile__(
  34         "       rsm     2,%0\n"
  35         "       ldbx    0(%2),%1\n"
  36         "       mtsm    %0\n"
  37         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  38
  39         return ret;
  40 }
  41
  42 static inline unsigned short gsc_readw(unsigned long addr)
  43 {
  44         long flags;
  45         unsigned short ret;
  46
  47         __asm__ __volatile__(
  48         "       rsm     2,%0\n"
  49         "       ldhx    0(%2),%1\n"
  50         "       mtsm    %0\n"
  51         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  52
  53         return ret;
  54 }
  55
  56 static inline unsigned int gsc_readl(unsigned long addr)
  57 {
  58         u32 ret;
  59
  60         __asm__ __volatile__(
  61         "       ldwax   0(%1),%0\n"
  62         : "=r" (ret) : "r" (addr) );
  63
  64         return ret;
  65 }
  66
  67 static inline unsigned long long gsc_readq(unsigned long addr)
  68 {
  69         unsigned long long ret;
  70
  71 #ifdef __LP64__
  72         __asm__ __volatile__(
  73         "       ldda    0(%1),%0\n"
  74         :  "=r" (ret) : "r" (addr) );
  75 #else
  76         /* two reads may have side effects.. */
  77         ret = ((u64) gsc_readl(addr)) << 32;
  78         ret |= gsc_readl(addr+4);
  79 #endif
  80         return ret;
  81 }
  82
  83 static inline void gsc_writeb(unsigned char val, unsigned long addr)
  84 {
  85         long flags;
  86         __asm__ __volatile__(
  87         "       rsm     2,%0\n"
  88         "       stbs    %1,0(%2)\n"
  89         "       mtsm    %0\n"
  90         : "=&r" (flags) :  "r" (val), "r" (addr) );
  91 }
  92
  93 static inline void gsc_writew(unsigned short val, unsigned long addr)
  94 {
  95         long flags;
  96         __asm__ __volatile__(
  97         "       rsm     2,%0\n"
  98         "       sths    %1,0(%2)\n"
  99         "       mtsm    %0\n"
 100         : "=&r" (flags) :  "r" (val), "r" (addr) );
 101 }
 102
 103 static inline void gsc_writel(unsigned int val, unsigned long addr)
 104 {
 105         __asm__ __volatile__(
 106         "       stwas   %0,0(%1)\n"
 107         : :  "r" (val), "r" (addr) );
 108 }
 109
 110 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
 111 {
 112 #ifdef __LP64__
 113         __asm__ __volatile__(
 114         "       stda    %0,0(%1)\n"
 115         : :  "r" (val), "r" (addr) );
 116 #else
 117         /* two writes may have side effects.. */
 118         gsc_writel(val >> 32, addr);
 119         gsc_writel(val, addr+4);
 120 #endif
 121 }
 122
 123 /*
 124  * The standard PCI ioremap interfaces
 125  */
 126
 127 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 128
 129 extern inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 130 {
 131         return __ioremap(offset, size, 0);
 132 }
 133
 134 /*
 135  * This one maps high address device memory and turns off caching for that area.
 136  * it's useful if some control registers are in such an area and write combining
 137  * or read caching is not desirable:
 138  */
 139 extern inline void * ioremap_nocache(unsigned long offset, unsigned long size)
 140 {
 141         return __ioremap(offset, size, _PAGE_NO_CACHE /* _PAGE_PCD */);
 142 }
 143
 144 extern void iounmap(void __iomem *addr);
 145
 146
 147 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 148 {
 149         return (*(volatile unsigned char __force *) (addr));
 150 }
 151 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 152 {
 153         return *(volatile unsigned short __force *) addr;
 154 }
 155 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 156 {
 157         return *(volatile unsigned int __force *) addr;
 158 }
 159 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 160 {
 161         return *(volatile unsigned long long __force *) addr;
 162 }
 163
 164 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 165 {
 166         *(volatile unsigned char __force *) addr = b;
 167 }
 168 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 169 {
 170         *(volatile unsigned short __force *) addr = b;
 171 }
 172 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 173 {
 174         *(volatile unsigned int __force *) addr = b;
 175 }
 176 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 177 {
 178         *(volatile unsigned long long __force *) addr = b;
 179 }
 180
 181 /* readb can never be const, so use __fswab instead of le*_to_cpu */
 182 #define readb(addr) __raw_readb(addr)
 183 #define readw(addr) __fswab16(__raw_readw(addr))
 184 #define readl(addr) __fswab32(__raw_readl(addr))
 185 #define readq(addr) __fswab64(__raw_readq(addr))
 186 #define writeb(b, addr) __raw_writeb(b, addr)
 187 #define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
 188 #define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
 189 #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
 190
 191 #define readb_relaxed(addr) readb(addr)
 192 #define readw_relaxed(addr) readw(addr)
 193 #define readl_relaxed(addr) readl(addr)
 194 #define readq_relaxed(addr) readq(addr)
 195
 196 #define mmiowb() do { } while (0)
 197
 198 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 199 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 200 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 201
 202 /*
 203  * XXX - We don't have csum_partial_copy_fromio() yet, so we cheat here and
 204  * just copy it. The net code will then do the checksum later. Presently
 205  * only used by some shared memory 8390 Ethernet cards anyway.
 206  */
 207
 208 #define eth_io_copy_and_sum(skb,src,len,unused) \
 209   memcpy_fromio((skb)->data,(src),(len))
 210
 211 /* Port-space IO */
 212
 213 #define inb_p inb
 214 #define inw_p inw
 215 #define inl_p inl
 216 #define outb_p outb
 217 #define outw_p outw
 218 #define outl_p outl
 219
 220 extern unsigned char eisa_in8(unsigned short port);
 221 extern unsigned short eisa_in16(unsigned short port);
 222 extern unsigned int eisa_in32(unsigned short port);
 223 extern void eisa_out8(unsigned char data, unsigned short port);
 224 extern void eisa_out16(unsigned short data, unsigned short port);
 225 extern void eisa_out32(unsigned int data, unsigned short port);
 226
 227 #if defined(CONFIG_PCI)
 228 extern unsigned char inb(int addr);
 229 extern unsigned short inw(int addr);
 230 extern unsigned int inl(int addr);
 231
 232 extern void outb(unsigned char b, int addr);
 233 extern void outw(unsigned short b, int addr);
 234 extern void outl(unsigned int b, int addr);
 235 #elif defined(CONFIG_EISA)
 236 #define inb eisa_in8
 237 #define inw eisa_in16
 238 #define inl eisa_in32
 239 #define outb eisa_out8
 240 #define outw eisa_out16
 241 #define outl eisa_out32
 242 #else
 243 static inline char inb(unsigned long addr)
 244 {
 245         BUG();
 246         return -1;
 247 }
 248
 249 static inline short inw(unsigned long addr)
 250 {
 251         BUG();
 252         return -1;
 253 }
 254
 255 static inline int inl(unsigned long addr)
 256 {
 257         BUG();
 258         return -1;
 259 }
 260
 261 #define outb(x, y)      BUG()
 262 #define outw(x, y)      BUG()
 263 #define outl(x, y)      BUG()
 264 #endif
 265
 266 /*
 267  * String versions of in/out ops:
 268  */
 269 extern void insb (unsigned long port, void *dst, unsigned long count);
 270 extern void insw (unsigned long port, void *dst, unsigned long count);
 271 extern void insl (unsigned long port, void *dst, unsigned long count);
 272 extern void outsb (unsigned long port, const void *src, unsigned long count);
 273 extern void outsw (unsigned long port, const void *src, unsigned long count);
 274 extern void outsl (unsigned long port, const void *src, unsigned long count);
 275
 276
 277 /* IO Port space is :      BBiiii   where BB is HBA number. */
 278 #define IO_SPACE_LIMIT 0x00ffffff
 279
 280
 281 #define dma_cache_inv(_start,_size)             do { flush_kernel_dcache_range(_start,_size); } while (0)
 282 #define dma_cache_wback(_start,_size)           do { flush_kernel_dcache_range(_start,_size); } while (0)
 283 #define dma_cache_wback_inv(_start,_size)       do { flush_kernel_dcache_range(_start,_size); } while (0)
 284
 285 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 286  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 287  * mode (essentially just sign extending.  This macro takes in a 32
 288  * bit I/O address (still with the leading f) and outputs the correct
 289  * value for either 32 or 64 bit mode */
 290 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 291
 292 #include <asm-generic/iomap.h>
 293
 294 /*
 295  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 296  * access
 297  */
 298 #define xlate_dev_mem_ptr(p)    __va(p)
 299
 300 /*
 301  * Convert a virtual cached pointer to an uncached pointer
 302  */
 303 #define xlate_dev_kmem_ptr(p)   p
 304
 305 #endif