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 static inline unsigned long isa_bus_to_virt(unsigned long addr) {
  19         BUG();
  20         return 0;
  21 }
  22
  23 static inline unsigned long isa_virt_to_bus(void *addr) {
  24         BUG();
  25         return 0;
  26 }
  27
  28 /*
  29  * Memory mapped I/O
  30  *
  31  * readX()/writeX() do byteswapping and take an ioremapped address
  32  * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
  33  * gsc_*() don't byteswap and operate on physical addresses;
  34  *   eg dev->hpa or 0xfee00000.
  35  */
  36
  37 static inline unsigned char gsc_readb(unsigned long addr)
  38 {
  39         long flags;
  40         unsigned char ret;
  41
  42         __asm__ __volatile__(
  43         "       rsm     2,%0\n"
  44         "       ldbx    0(%2),%1\n"
  45         "       mtsm    %0\n"
  46         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  47
  48         return ret;
  49 }
  50
  51 static inline unsigned short gsc_readw(unsigned long addr)
  52 {
  53         long flags;
  54         unsigned short ret;
  55
  56         __asm__ __volatile__(
  57         "       rsm     2,%0\n"
  58         "       ldhx    0(%2),%1\n"
  59         "       mtsm    %0\n"
  60         : "=&r" (flags), "=r" (ret) : "r" (addr) );
  61
  62         return ret;
  63 }
  64
  65 static inline unsigned int gsc_readl(unsigned long addr)
  66 {
  67         u32 ret;
  68
  69         __asm__ __volatile__(
  70         "       ldwax   0(%1),%0\n"
  71         : "=r" (ret) : "r" (addr) );
  72
  73         return ret;
  74 }
  75
  76 static inline unsigned long long gsc_readq(unsigned long addr)
  77 {
  78         unsigned long long ret;
  79
  80 #ifdef CONFIG_64BIT
  81         __asm__ __volatile__(
  82         "       ldda    0(%1),%0\n"
  83         :  "=r" (ret) : "r" (addr) );
  84 #else
  85         /* two reads may have side effects.. */
  86         ret = ((u64) gsc_readl(addr)) << 32;
  87         ret |= gsc_readl(addr+4);
  88 #endif
  89         return ret;
  90 }
  91
  92 static inline void gsc_writeb(unsigned char val, unsigned long addr)
  93 {
  94         long flags;
  95         __asm__ __volatile__(
  96         "       rsm     2,%0\n"
  97         "       stbs    %1,0(%2)\n"
  98         "       mtsm    %0\n"
  99         : "=&r" (flags) :  "r" (val), "r" (addr) );
 100 }
 101
 102 static inline void gsc_writew(unsigned short val, unsigned long addr)
 103 {
 104         long flags;
 105         __asm__ __volatile__(
 106         "       rsm     2,%0\n"
 107         "       sths    %1,0(%2)\n"
 108         "       mtsm    %0\n"
 109         : "=&r" (flags) :  "r" (val), "r" (addr) );
 110 }
 111
 112 static inline void gsc_writel(unsigned int val, unsigned long addr)
 113 {
 114         __asm__ __volatile__(
 115         "       stwas   %0,0(%1)\n"
 116         : :  "r" (val), "r" (addr) );
 117 }
 118
 119 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
 120 {
 121 #ifdef CONFIG_64BIT
 122         __asm__ __volatile__(
 123         "       stda    %0,0(%1)\n"
 124         : :  "r" (val), "r" (addr) );
 125 #else
 126         /* two writes may have side effects.. */
 127         gsc_writel(val >> 32, addr);
 128         gsc_writel(val, addr+4);
 129 #endif
 130 }
 131
 132 /*
 133  * The standard PCI ioremap interfaces
 134  */
 135
 136 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 137
 138 /* Most machines react poorly to I/O-space being cacheable... Instead let's
 139  * define ioremap() in terms of ioremap_nocache().
 140  */
 141 static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 142 {
 143         return __ioremap(offset, size, _PAGE_NO_CACHE);
 144 }
 145 #define ioremap_nocache(off, sz)        ioremap((off), (sz))
 146
 147 extern void iounmap(const volatile void __iomem *addr);
 148
 149 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 150 {
 151         return (*(volatile unsigned char __force *) (addr));
 152 }
 153 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 154 {
 155         return *(volatile unsigned short __force *) addr;
 156 }
 157 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 158 {
 159         return *(volatile unsigned int __force *) addr;
 160 }
 161 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 162 {
 163         return *(volatile unsigned long long __force *) addr;
 164 }
 165
 166 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 167 {
 168         *(volatile unsigned char __force *) addr = b;
 169 }
 170 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 171 {
 172         *(volatile unsigned short __force *) addr = b;
 173 }
 174 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 175 {
 176         *(volatile unsigned int __force *) addr = b;
 177 }
 178 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 179 {
 180         *(volatile unsigned long long __force *) addr = b;
 181 }
 182
 183 /* readb can never be const, so use __fswab instead of le*_to_cpu */
 184 #define readb(addr) __raw_readb(addr)
 185 #define readw(addr) __fswab16(__raw_readw(addr))
 186 #define readl(addr) __fswab32(__raw_readl(addr))
 187 #define readq(addr) __fswab64(__raw_readq(addr))
 188 #define writeb(b, addr) __raw_writeb(b, addr)
 189 #define writew(b, addr) __raw_writew(cpu_to_le16(b), addr)
 190 #define writel(b, addr) __raw_writel(cpu_to_le32(b), addr)
 191 #define writeq(b, addr) __raw_writeq(cpu_to_le64(b), addr)
 192
 193 #define readb_relaxed(addr) readb(addr)
 194 #define readw_relaxed(addr) readw(addr)
 195 #define readl_relaxed(addr) readl(addr)
 196 #define readq_relaxed(addr) readq(addr)
 197
 198 #define mmiowb() do { } while (0)
 199
 200 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 201 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 202 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 203
 204 /* Port-space IO */
 205
 206 #define inb_p inb
 207 #define inw_p inw
 208 #define inl_p inl
 209 #define outb_p outb
 210 #define outw_p outw
 211 #define outl_p outl
 212
 213 extern unsigned char eisa_in8(unsigned short port);
 214 extern unsigned short eisa_in16(unsigned short port);
 215 extern unsigned int eisa_in32(unsigned short port);
 216 extern void eisa_out8(unsigned char data, unsigned short port);
 217 extern void eisa_out16(unsigned short data, unsigned short port);
 218 extern void eisa_out32(unsigned int data, unsigned short port);
 219
 220 #if defined(CONFIG_PCI)
 221 extern unsigned char inb(int addr);
 222 extern unsigned short inw(int addr);
 223 extern unsigned int inl(int addr);
 224
 225 extern void outb(unsigned char b, int addr);
 226 extern void outw(unsigned short b, int addr);
 227 extern void outl(unsigned int b, int addr);
 228 #elif defined(CONFIG_EISA)
 229 #define inb eisa_in8
 230 #define inw eisa_in16
 231 #define inl eisa_in32
 232 #define outb eisa_out8
 233 #define outw eisa_out16
 234 #define outl eisa_out32
 235 #else
 236 static inline char inb(unsigned long addr)
 237 {
 238         BUG();
 239         return -1;
 240 }
 241
 242 static inline short inw(unsigned long addr)
 243 {
 244         BUG();
 245         return -1;
 246 }
 247
 248 static inline int inl(unsigned long addr)
 249 {
 250         BUG();
 251         return -1;
 252 }
 253
 254 #define outb(x, y)      BUG()
 255 #define outw(x, y)      BUG()
 256 #define outl(x, y)      BUG()
 257 #endif
 258
 259 /*
 260  * String versions of in/out ops:
 261  */
 262 extern void insb (unsigned long port, void *dst, unsigned long count);
 263 extern void insw (unsigned long port, void *dst, unsigned long count);
 264 extern void insl (unsigned long port, void *dst, unsigned long count);
 265 extern void outsb (unsigned long port, const void *src, unsigned long count);
 266 extern void outsw (unsigned long port, const void *src, unsigned long count);
 267 extern void outsl (unsigned long port, const void *src, unsigned long count);
 268
 269
 270 /* IO Port space is :      BBiiii   where BB is HBA number. */
 271 #define IO_SPACE_LIMIT 0x00ffffff
 272
 273 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 274  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 275  * mode (essentially just sign extending.  This macro takes in a 32
 276  * bit I/O address (still with the leading f) and outputs the correct
 277  * value for either 32 or 64 bit mode */
 278 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 279
 280 #include <asm-generic/iomap.h>
 281
 282 /*
 283  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 284  * access
 285  */
 286 #define xlate_dev_mem_ptr(p)    __va(p)
 287
 288 /*
 289  * Convert a virtual cached pointer to an uncached pointer
 290  */
 291 #define xlate_dev_kmem_ptr(p)   p
 292
 293 #endif