LXR linux/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
  13static inline unsigned long isa_bus_to_virt(unsigned long addr) {
  14        BUG();
  15        return 0;
  16}
  17
  18static 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
  32static 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
  46static 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
  60static 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
  71static 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
  87static 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
  97static 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
 107static 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
 114static 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 */
 130void __iomem *ioremap(unsigned long offset, unsigned long size);
 131#define ioremap_wc                      ioremap
 132#define ioremap_uc                      ioremap
 133
 134extern void iounmap(const volatile void __iomem *addr);
 135
 136static inline unsigned char __raw_readb(const volatile void __iomem *addr)
 137{
 138        return (*(volatile unsigned char __force *) (addr));
 139}
 140static inline unsigned short __raw_readw(const volatile void __iomem *addr)
 141{
 142        return *(volatile unsigned short __force *) addr;
 143}
 144static inline unsigned int __raw_readl(const volatile void __iomem *addr)
 145{
 146        return *(volatile unsigned int __force *) addr;
 147}
 148static inline unsigned long long __raw_readq(const volatile void __iomem *addr)
 149{
 150        return *(volatile unsigned long long __force *) addr;
 151}
 152
 153static inline void __raw_writeb(unsigned char b, volatile void __iomem *addr)
 154{
 155        *(volatile unsigned char __force *) addr = b;
 156}
 157static inline void __raw_writew(unsigned short b, volatile void __iomem *addr)
 158{
 159        *(volatile unsigned short __force *) addr = b;
 160}
 161static inline void __raw_writel(unsigned int b, volatile void __iomem *addr)
 162{
 163        *(volatile unsigned int __force *) addr = b;
 164}
 165static inline void __raw_writeq(unsigned long long b, volatile void __iomem *addr)
 166{
 167        *(volatile unsigned long long __force *) addr = b;
 168}
 169
 170static inline unsigned char readb(const volatile void __iomem *addr)
 171{
 172        return __raw_readb(addr);
 173}
 174static inline unsigned short readw(const volatile void __iomem *addr)
 175{
 176        return le16_to_cpu((__le16 __force) __raw_readw(addr));
 177}
 178static inline unsigned int readl(const volatile void __iomem *addr)
 179{
 180        return le32_to_cpu((__le32 __force) __raw_readl(addr));
 181}
 182static inline unsigned long long readq(const volatile void __iomem *addr)
 183{
 184        return le64_to_cpu((__le64 __force) __raw_readq(addr));
 185}
 186
 187static inline void writeb(unsigned char b, volatile void __iomem *addr)
 188{
 189        __raw_writeb(b, addr);
 190}
 191static inline void writew(unsigned short w, volatile void __iomem *addr)
 192{
 193        __raw_writew((__u16 __force) cpu_to_le16(w), addr);
 194}
 195static inline void writel(unsigned int l, volatile void __iomem *addr)
 196{
 197        __raw_writel((__u32 __force) cpu_to_le32(l), addr);
 198}
 199static 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
 222void memset_io(volatile void __iomem *addr, unsigned char val, int count);
 223void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
 224void 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
 235extern unsigned char eisa_in8(unsigned short port);
 236extern unsigned short eisa_in16(unsigned short port);
 237extern unsigned int eisa_in32(unsigned short port);
 238extern void eisa_out8(unsigned char data, unsigned short port);
 239extern void eisa_out16(unsigned short data, unsigned short port);
 240extern void eisa_out32(unsigned int data, unsigned short port);
 241
 242#if defined(CONFIG_PCI)
 243extern unsigned char inb(int addr);
 244extern unsigned short inw(int addr);
 245extern unsigned int inl(int addr);
 246
 247extern void outb(unsigned char b, int addr);
 248extern void outw(unsigned short b, int addr);
 249extern 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
 258static inline char inb(unsigned long addr)
 259{
 260        BUG();
 261        return -1;
 262}
 263
 264static inline short inw(unsigned long addr)
 265{
 266        BUG();
 267        return -1;
 268}
 269
 270static 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 */
 284extern void insb (unsigned long port, void *dst, unsigned long count);
 285extern void insw (unsigned long port, void *dst, unsigned long count);
 286extern void insl (unsigned long port, void *dst, unsigned long count);
 287extern void outsb (unsigned long port, const void *src, unsigned long count);
 288extern void outsw (unsigned long port, const void *src, unsigned long count);
 289extern 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
 306extern u64 ioread64(const void __iomem *addr);
 307extern u64 ioread64be(const void __iomem *addr);
 308extern void iowrite64(u64 val, void __iomem *addr);
 309extern 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
 319extern int devmem_is_allowed(unsigned long pfn);
 320
 321#endif
 322