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 <linux/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 void __iomem *ioremap(unsigned long offset, unsigned long size);
 131 #define ioremap_wc                      ioremap
 132 #define ioremap_uc                      ioremap
 133
 134 extern void iounmap(const volatile void __iomem *addr);
 135
 136 static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 137 {
 138         return (*(volatile unsigned char __force *) (addr));
 139 }
 140 static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 141 {
 142         return *(volatile unsigned short __force *) addr;
 143 }
 144 static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 145 {
 146         return *(volatile unsigned int __force *) addr;
 147 }
 148 static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 149 {
 150         return *(volatile unsigned long long __force *) addr;
 151 }
 152
 153 static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 154 {
 155         *(volatile unsigned char __force *) addr = b;
 156 }
 157 static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 158 {
 159         *(volatile unsigned short __force *) addr = b;
 160 }
 161 static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 162 {
 163         *(volatile unsigned int __force *) addr = b;
 164 }
 165 static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 166 {
 167         *(volatile unsigned long long __force *) addr = b;
 168 }
 169
 170 static inline unsigned char readb(const volatile void __iomem *addr)
 171 {
 172         return __raw_readb(addr);
 173 }
 174 static inline unsigned short readw(const volatile void __iomem *addr)
 175 {
 176         return le16_to_cpu((__le16 __force) __raw_readw(addr));
 177 }
 178 static inline unsigned int readl(const volatile void __iomem *addr)
 179 {
 180         return le32_to_cpu((__le32 __force) __raw_readl(addr));
 181 }
 182 static inline unsigned long long readq(const volatile void __iomem *addr)
 183 {
 184         return le64_to_cpu((__le64 __force) __raw_readq(addr));
 185 }
 186
 187 static inline void writeb(unsigned char b, volatile void __iomem *addr)
 188 {
 189         __raw_writeb(b, addr);
 190 }
 191 static inline void writew(unsigned short w, volatile void __iomem *addr)
 192 {
 193         __raw_writew((__u16 __force) cpu_to_le16(w), addr);
 194 }
 195 static inline void writel(unsigned int l, volatile void __iomem *addr)
 196 {
 197         __raw_writel((__u32 __force) cpu_to_le32(l), addr);
 198 }
 199 static inline void writeq(unsigned long long q, volatile void __iomem *addr)
 200 {
 201         __raw_writeq((__u64 __force) cpu_to_le64(q), addr);
 202 }
 203
 204 #define readb   readb
 205 #define readw   readw
 206 #define readl   readl
 207 #define readq   readq
 208 #define writeb  writeb
 209 #define writew  writew
 210 #define writel  writel
 211 #define writeq  writeq
 212
 213 #define readb_relaxed(addr)     readb(addr)
 214 #define readw_relaxed(addr)     readw(addr)
 215 #define readl_relaxed(addr)     readl(addr)
 216 #define readq_relaxed(addr)     readq(addr)
 217 #define writeb_relaxed(b, addr) writeb(b, addr)
 218 #define writew_relaxed(w, addr) writew(w, addr)
 219 #define writel_relaxed(l, addr) writel(l, addr)
 220 #define writeq_relaxed(q, addr) writeq(q, addr)
 221
 222 void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 223 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 224 void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
 225
 226 /* Port-space IO */
 227
 228 #define inb_p inb
 229 #define inw_p inw
 230 #define inl_p inl
 231 #define outb_p outb
 232 #define outw_p outw
 233 #define outl_p outl
 234
 235 extern unsigned char eisa_in8(unsigned short port);
 236 extern unsigned short eisa_in16(unsigned short port);
 237 extern unsigned int eisa_in32(unsigned short port);
 238 extern void eisa_out8(unsigned char data, unsigned short port);
 239 extern void eisa_out16(unsigned short data, unsigned short port);
 240 extern void eisa_out32(unsigned int data, unsigned short port);
 241
 242 #if defined(CONFIG_PCI)
 243 extern unsigned char inb(int addr);
 244 extern unsigned short inw(int addr);
 245 extern unsigned int inl(int addr);
 246
 247 extern void outb(unsigned char b, int addr);
 248 extern void outw(unsigned short b, int addr);
 249 extern void outl(unsigned int b, int addr);
 250 #elif defined(CONFIG_EISA)
 251 #define inb eisa_in8
 252 #define inw eisa_in16
 253 #define inl eisa_in32
 254 #define outb eisa_out8
 255 #define outw eisa_out16
 256 #define outl eisa_out32
 257 #else
 258 static inline char inb(unsigned long addr)
 259 {
 260         BUG();
 261         return -1;
 262 }
 263
 264 static inline short inw(unsigned long addr)
 265 {
 266         BUG();
 267         return -1;
 268 }
 269
 270 static inline int inl(unsigned long addr)
 271 {
 272         BUG();
 273         return -1;
 274 }
 275
 276 #define outb(x, y)      BUG()
 277 #define outw(x, y)      BUG()
 278 #define outl(x, y)      BUG()
 279 #endif
 280
 281 /*
 282  * String versions of in/out ops:
 283  */
 284 extern void insb (unsigned long port, void *dst, unsigned long count);
 285 extern void insw (unsigned long port, void *dst, unsigned long count);
 286 extern void insl (unsigned long port, void *dst, unsigned long count);
 287 extern void outsb (unsigned long port, const void *src, unsigned long count);
 288 extern void outsw (unsigned long port, const void *src, unsigned long count);
 289 extern void outsl (unsigned long port, const void *src, unsigned long count);
 290
 291
 292 /* IO Port space is :      BBiiii   where BB is HBA number. */
 293 #define IO_SPACE_LIMIT 0x00ffffff
 294
 295 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32
 296  * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit
 297  * mode (essentially just sign extending.  This macro takes in a 32
 298  * bit I/O address (still with the leading f) and outputs the correct
 299  * value for either 32 or 64 bit mode */
 300 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 301
 302 #define ioread64 ioread64
 303 #define ioread64be ioread64be
 304 #define iowrite64 iowrite64
 305 #define iowrite64be iowrite64be
 306 extern u64 ioread64(const void __iomem *addr);
 307 extern u64 ioread64be(const void __iomem *addr);
 308 extern void iowrite64(u64 val, void __iomem *addr);
 309 extern void iowrite64be(u64 val, void __iomem *addr);
 310
 311 #include <asm-generic/iomap.h>
 312
 313 /*
 314  * Convert a physical pointer to a virtual kernel pointer for /dev/mem
 315  * access
 316  */
 317 #define xlate_dev_mem_ptr(p)    __va(p)
 318
 319 /*
 320  * Convert a virtual cached pointer to an uncached pointer
 321  */
 322 #define xlate_dev_kmem_ptr(p)   p
 323
 324 #endif