arch/parisc/include/asm/io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_IO_H
   3 #define _ASM_IO_H
   4
   5 #include <linux/types.h>
   6 #include <asm/pgtable.h>
   7
   8 #define virt_to_phys(a) ((unsigned long)__pa(a))
   9 #define phys_to_virt(a) __va(a)
  10 #define virt_to_bus virt_to_phys
  11 #define bus_to_virt phys_to_virt
  12
  13 static inline unsigned long isa_bus_to_virt(unsigned long addr) {
  14         BUG();
  15         return 0;
  16 }
  17
  18 static inline unsigned long isa_virt_to_bus(void *addr) {
  19         BUG();
  20         return 0;
  21 }
  22
  23 /*
  24  * Memory mapped I/O
  25  *
  26  * readX()/writeX() do byteswapping and take an ioremapped address
  27  * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address.
  28  * gsc_*() don't byteswap and operate on physical addresses;
  29  *   eg dev->hpa or 0xfee00000.
  30  */
  31
  32 static inline unsigned char gsc_readb(unsigned long addr)
  33 {
  34         long flags;
  35         unsigned char ret;
  36
  37         __asm__ __volatile__(
  38         "       rsm     %3,%0\n"
  39         "       ldbx    0(%2),%1\n"
  40         "       mtsm    %0\n"
  41         : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
  42
  43         return ret;
  44 }
  45
  46 static inline unsigned short gsc_readw(unsigned long addr)
  47 {
  48         long flags;
  49         unsigned short ret;
  50
  51         __asm__ __volatile__(
  52         "       rsm     %3,%0\n"
  53         "       ldhx    0(%2),%1\n"
  54         "       mtsm    %0\n"
  55         : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) );
  56
  57         return ret;
  58 }
  59
  60 static inline unsigned int gsc_readl(unsigned long addr)
  61 {
  62         u32 ret;
  63
  64         __asm__ __volatile__(
  65         "       ldwax   0(%1),%0\n"
  66         : "=r" (ret) : "r" (addr) );
  67
  68         return ret;
  69 }
  70
  71 static inline unsigned long long gsc_readq(unsigned long addr)
  72 {
  73         unsigned long long ret;
  74
  75 #ifdef CONFIG_64BIT
  76         __asm__ __volatile__(
  77         "       ldda    0(%1),%0\n"
  78         :  "=r" (ret) : "r" (addr) );
  79 #else
  80         /* two reads may have side effects.. */
  81         ret = ((u64) gsc_readl(addr)) << 32;
  82         ret |= gsc_readl(addr+4);
  83 #endif
  84         return ret;
  85 }
  86
  87 static inline void gsc_writeb(unsigned char val, unsigned long addr)
  88 {
  89         long flags;
  90         __asm__ __volatile__(
  91         "       rsm     %3,%0\n"
  92         "       stbs    %1,0(%2)\n"
  93         "       mtsm    %0\n"
  94         : "=&r" (flags) :  "r" (val), "r" (addr), "i" (PSW_SM_D) );
  95 }
  96
  97 static inline void gsc_writew(unsigned short val, unsigned long addr)
  98 {
  99         long flags;
 100         __asm__ __volatile__(
 101         "       rsm     %3,%0\n"
 102         "       sths    %1,0(%2)\n"
 103         "       mtsm    %0\n"
 104         : "=&r" (flags) :  "r" (val), "r" (addr), "i" (PSW_SM_D) );
 105 }
 106
 107 static inline void gsc_writel(unsigned int val, unsigned long addr)
 108 {
 109         __asm__ __volatile__(
 110         "       stwas   %0,0(%1)\n"
 111         : :  "r" (val), "r" (addr) );
 112 }
 113
 114 static inline void gsc_writeq(unsigned long long val, unsigned long addr)
 115 {
 116 #ifdef CONFIG_64BIT
 117         __asm__ __volatile__(
 118         "       stda    %0,0(%1)\n"
 119         : :  "r" (val), "r" (addr) );
 120 #else
 121         /* two writes may have side effects.. */
 122         gsc_writel(val >> 32, addr);
 123         gsc_writel(val, addr+4);
 124 #endif
 125 }
 126
 127 /*
 128  * The standard PCI ioremap interfaces
 129  */
 130
 131 extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsigned long flags);
 132
 133 /* Most machines react poorly to I/O-space being cacheable... Instead let's
 134  * define ioremap() in terms of ioremap_nocache().
 135  */
 136 static inline void __iomem * ioremap(unsigned long offset, unsigned long size)
 137 {
 138         return __ioremap(offset, size, _PAGE_NO_CACHE);
 139 }
 140 #define ioremap_nocache(off, sz)        ioremap((off), (sz))
 141 #define ioremap_wc                      ioremap_nocache
 142 #define ioremap_uc                      ioremap_nocache
 143
 144 extern void iounmap(const volatile void __iomem *addr);
 145
 146 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 147 {
 148         return (*(volatile unsigned char __force *) (addr));
 149 }
 150 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 151 {
 152         return *(volatile unsigned short __force *) addr;
 153 }
 154 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 155 {
 156         return *(volatile unsigned int __force *) addr;
 157 }
 158 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 159 {
 160         return *(volatile unsigned long long __force *) addr;
 161 }
 162
 163 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 164 {
 165         *(volatile unsigned char __force *) addr = b;
 166 }
 167 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 168 {
 169         *(volatile unsigned short __force *) addr = b;
 170 }
 171 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 172 {
 173         *(volatile unsigned int __force *) addr = b;
 174 }
 175 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 176 {
 177         *(volatile unsigned long long __force *) addr = b;
 178 }
 179
 180 static inline unsigned char readb(const volatile void __iomem *addr)
 181 {
 182         return __raw_readb(addr);
 183 }
 184 static inline unsigned short readw(const volatile void __iomem *addr)
 185 {
 186         return le16_to_cpu(__raw_readw(addr));
 187 }
 188 static inline unsigned int readl(const volatile void __iomem *addr)
 189 {
 190         return le32_to_cpu(__raw_readl(addr));
 191 }
 192 static inline unsigned long long readq(const volatile void __iomem *addr)
 193 {
 194         return le64_to_cpu(__raw_readq(addr));
 195 }
 196
 197 static inline void writeb(unsigned char b, volatile void __iomem *addr)
 198 {
 199         __raw_writeb(b, addr);
 200 }
 201 static inline void writew(unsigned short w, volatile void __iomem *addr)
 202 {
 203         __raw_writew(cpu_to_le16(w), addr);
 204 }
 205 static inline void writel(unsigned int l, volatile void __iomem *addr)
 206 {
 207         __raw_writel(cpu_to_le32(l), addr);
 208 }
 209 static inline void writeq(unsigned long long q, volatile void __iomem *addr)
 210 {
 211         __raw_writeq(cpu_to_le64(q), addr);
 212 }
 213
 214 #define readb   readb
 215 #define readw   readw
 216 #define readl   readl
 217 #define readq   readq
 218 #define writeb  writeb
 219 #define writew  writew
 220 #define writel  writel
 221 #define writeq  writeq
 222
 223 #define readb_relaxed(addr)     readb(addr)
 224 #define readw_relaxed(addr)     readw(addr)
 225 #define readl_relaxed(addr)     readl(addr)
 226 #define readq_relaxed(addr)     readq(addr)
 227 #define writeb_relaxed(b, addr) writeb(b, addr)
 228 #define writew_relaxed(w, addr) writew(w, addr)
 229 #define writel_relaxed(l, addr) writel(l, addr)
 230 #define writeq_relaxed(q, addr) writeq(q, addr)
 231
 232 #define mmiowb() do { } while (0)
 233
 234 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 235 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 236 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 237
 238 /* Port-space IO */
 239
 240 #define inb_p inb
 241 #define inw_p inw
 242 #define inl_p inl
 243 #define outb_p outb
 244 #define outw_p outw
 245 #define outl_p outl
 246
 247 extern unsigned char eisa_in8(unsigned short port);
 248 extern unsigned short eisa_in16(unsigned short port);
 249 extern unsigned int eisa_in32(unsigned short port);
 250 extern void eisa_out8(unsigned char data, unsigned short port);
 251 extern void eisa_out16(unsigned short data, unsigned short port);
 252 extern void eisa_out32(unsigned int data, unsigned short port);
 253
 254 #if defined(CONFIG_PCI)
 255 extern unsigned char inb(int addr);
 256 extern unsigned short inw(int addr);
 257 extern unsigned int inl(int addr);
 258
 259 extern void outb(unsigned char b, int addr);
 260 extern void outw(unsigned short b, int addr);
 261 extern void outl(unsigned int b, int addr);
 262 #elif defined(CONFIG_EISA)
 263 #define inb eisa_in8
 264 #define inw eisa_in16
 265 #define inl eisa_in32
 266 #define outb eisa_out8
 267 #define outw eisa_out16
 268 #define outl eisa_out32
 269 #else
 270 static inline char inb(unsigned long addr)
 271 {
 272         BUG();
 273         return -1;
 274 }
 275
 276 static inline short inw(unsigned long addr)
 277 {
 278         BUG();
 279         return -1;
 280 }
 281
 282 static inline int inl(unsigned long addr)
 283 {
 284         BUG();
 285         return -1;
 286 }
 287
 288 #define outb(x, y)      BUG()
 289 #define outw(x, y)      BUG()
 290 #define outl(x, y)      BUG()
 291 #endif
 292
 293 /*
 294  * String versions of in/out ops:
 295  */
 296 extern void insb (unsigned long port, void *dst, unsigned long count);
 297 extern void insw (unsigned long port, void *dst, unsigned long count);
 298 extern void insl (unsigned long port, void *dst, unsigned long count);
 299 extern void outsb (unsigned long port, const void *src, unsigned long count);
 300 extern void outsw (unsigned long port, const void *src, unsigned long count);
 301 extern void outsl (unsigned long port, const void *src, unsigned long count);
 302
 303
 304 /* IO Port space is :      BBiiii   where BB is HBA number. */
 305 #define IO_SPACE_LIMIT 0x00ffffff
 306
 307 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 308  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 309  * mode (essentially just sign extending.  This macro takes in a 32
 310  * bit I/O address (still with the leading f) and outputs the correct
 311  * value for either 32 or 64 bit mode */
 312 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 313
 314 #include <asm-generic/iomap.h>
 315
 316 /*
 317  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 318  * access
 319  */
 320 #define xlate_dev_mem_ptr(p)    __va(p)
 321
 322 /*
 323  * Convert a virtual cached pointer to an uncached pointer
 324  */
 325 #define xlate_dev_kmem_ptr(p)   p
 326
 327 #endif