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 11static inline unsigned long isa_bus_to_virt(unsigned long addr) { 12 BUG(); 13 return 0; 14} 15 16static inline unsigned long isa_virt_to_bus(void *addr) { 17 BUG(); 18 return 0; 19} 20 21/* 22 * Memory mapped I/O 23 * 24 * readX()/writeX() do byteswapping and take an ioremapped address 25 * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. 26 * gsc_*() don't byteswap and operate on physical addresses; 27 * eg dev->hpa or 0xfee00000. 28 */ 29 30static inline unsigned char gsc_readb(unsigned long addr) 31{ 32 long flags; 33 unsigned char ret; 34 35 __asm__ __volatile__( 36 " rsm %3,%0\n" 37 " ldbx 0(%2),%1\n" 38 " mtsm %0\n" 39 : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) ); 40 41 return ret; 42} 43 44static inline unsigned short gsc_readw(unsigned long addr) 45{ 46 long flags; 47 unsigned short ret; 48 49 __asm__ __volatile__( 50 " rsm %3,%0\n" 51 " ldhx 0(%2),%1\n" 52 " mtsm %0\n" 53 : "=&r" (flags), "=r" (ret) : "r" (addr), "i" (PSW_SM_D) ); 54 55 return ret; 56} 57 58static inline unsigned int gsc_readl(unsigned long addr) 59{ 60 u32 ret; 61 62 __asm__ __volatile__( 63 " ldwax 0(%1),%0\n" 64 : "=r" (ret) : "r" (addr) ); 65 66 return ret; 67} 68 69static inline unsigned long long gsc_readq(unsigned long addr) 70{ 71 unsigned long long ret; 72 73#ifdef CONFIG_64BIT 74 __asm__ __volatile__( 75 " ldda 0(%1),%0\n" 76 : "=r" (ret) : "r" (addr) ); 77#else 78 /* two reads may have side effects.. */ 79 ret = ((u64) gsc_readl(addr)) << 32; 80 ret |= gsc_readl(addr+4); 81#endif 82 return ret; 83} 84 85static inline void gsc_writeb(unsigned char val, unsigned long addr) 86{ 87 long flags; 88 __asm__ __volatile__( 89 " rsm %3,%0\n" 90 " stbs %1,0(%2)\n" 91 " mtsm %0\n" 92 : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) ); 93} 94 95static inline void gsc_writew(unsigned short val, unsigned long addr) 96{ 97 long flags; 98 __asm__ __volatile__( 99 " rsm %3,%0\n" 100 " sths %1,0(%2)\n" 101 " mtsm %0\n" 102 : "=&r" (flags) : "r" (val), "r" (addr), "i" (PSW_SM_D) ); 103} 104 105static inline void gsc_writel(unsigned int val, unsigned long addr) 106{ 107 __asm__ __volatile__( 108 " stwas %0,0(%1)\n" 109 : : "r" (val), "r" (addr) ); 110} 111 112static inline void gsc_writeq(unsigned long long val, unsigned long addr) 113{ 114#ifdef CONFIG_64BIT 115 __asm__ __volatile__( 116 " stda %0,0(%1)\n" 117 : : "r" (val), "r" (addr) ); 118#else 119 /* two writes may have side effects.. */ 120 gsc_writel(val >> 32, addr); 121 gsc_writel(val, addr+4); 122#endif 123} 124 125/* 126 * The standard PCI ioremap interfaces 127 */ 128#define ioremap_prot ioremap_prot 129 130#define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \ 131 _PAGE_ACCESSED | _PAGE_NO_CACHE) 132 133#define ioremap_wc(addr, size) \ 134 ioremap_prot((addr), (size), _PAGE_IOREMAP) 135 136#define pci_iounmap pci_iounmap 137 138void memset_io(volatile void __iomem *addr, unsigned char val, int count); 139void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); 140void memcpy_toio(volatile void __iomem *dst, const void *src, int count); 141#define memset_io memset_io 142#define memcpy_fromio memcpy_fromio 143#define memcpy_toio memcpy_toio 144 145/* Port-space IO */ 146 147#define inb_p inb 148#define inw_p inw 149#define inl_p inl 150#define outb_p outb 151#define outw_p outw 152#define outl_p outl 153 154extern unsigned char eisa_in8(unsigned short port); 155extern unsigned short eisa_in16(unsigned short port); 156extern unsigned int eisa_in32(unsigned short port); 157extern void eisa_out8(unsigned char data, unsigned short port); 158extern void eisa_out16(unsigned short data, unsigned short port); 159extern void eisa_out32(unsigned int data, unsigned short port); 160 161#if defined(CONFIG_PCI) 162extern unsigned char inb(int addr); 163extern unsigned short inw(int addr); 164extern unsigned int inl(int addr); 165extern void outb(unsigned char b, int addr); 166extern void outw(unsigned short b, int addr); 167extern void outl(unsigned int b, int addr); 168#define inb inb 169#define inw inw 170#define inl inl 171#define outb outb 172#define outw outw 173#define outl outl 174#elif defined(CONFIG_EISA) 175#define inb eisa_in8 176#define inw eisa_in16 177#define inl eisa_in32 178#define outb eisa_out8 179#define outw eisa_out16 180#define outl eisa_out32 181#else 182static inline char inb(unsigned long addr) 183{ 184 BUG(); 185 return -1; 186} 187 188static inline short inw(unsigned long addr) 189{ 190 BUG(); 191 return -1; 192} 193 194static inline int inl(unsigned long addr) 195{ 196 BUG(); 197 return -1; 198} 199#define inb inb 200#define inw inw 201#define inl inl 202#define outb(x, y) ({(void)(x); (void)(y); BUG(); 0;}) 203#define outw(x, y) ({(void)(x); (void)(y); BUG(); 0;}) 204#define outl(x, y) ({(void)(x); (void)(y); BUG(); 0;}) 205#endif 206 207/* 208 * String versions of in/out ops: 209 */ 210extern void insb (unsigned long port, void *dst, unsigned long count); 211extern void insw (unsigned long port, void *dst, unsigned long count); 212extern void insl (unsigned long port, void *dst, unsigned long count); 213extern void outsb (unsigned long port, const void *src, unsigned long count); 214extern void outsw (unsigned long port, const void *src, unsigned long count); 215extern void outsl (unsigned long port, const void *src, unsigned long count); 216#define insb insb 217#define insw insw 218#define insl insl 219#define outsb outsb 220#define outsw outsw 221#define outsl outsl 222 223/* IO Port space is : BBiiii where BB is HBA number. */ 224#define IO_SPACE_LIMIT 0x00ffffff 225 226/* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 227 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit 228 * mode (essentially just sign extending. This macro takes in a 32 229 * bit I/O address (still with the leading f) and outputs the correct 230 * value for either 32 or 64 bit mode */ 231#define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) 232 233#ifdef CONFIG_64BIT 234#define ioread64 ioread64 235#define ioread64be ioread64be 236#define iowrite64 iowrite64 237#define iowrite64be iowrite64be 238extern u64 ioread64(const void __iomem *addr); 239extern u64 ioread64be(const void __iomem *addr); 240extern void iowrite64(u64 val, void __iomem *addr); 241extern void iowrite64be(u64 val, void __iomem *addr); 242#endif 243 244#include <asm-generic/iomap.h> 245/* 246 * These get provided from <asm-generic/iomap.h> since parisc does not 247 * select GENERIC_IOMAP. 248 */ 249#define ioport_map ioport_map 250#define ioport_unmap ioport_unmap 251#define ioread8 ioread8 252#define ioread16 ioread16 253#define ioread32 ioread32 254#define ioread16be ioread16be 255#define ioread32be ioread32be 256#define iowrite8 iowrite8 257#define iowrite16 iowrite16 258#define iowrite32 iowrite32 259#define iowrite16be iowrite16be 260#define iowrite32be iowrite32be 261#define ioread8_rep ioread8_rep 262#define ioread16_rep ioread16_rep 263#define ioread32_rep ioread32_rep 264#define iowrite8_rep iowrite8_rep 265#define iowrite16_rep iowrite16_rep 266#define iowrite32_rep iowrite32_rep 267 268extern int devmem_is_allowed(unsigned long pfn); 269 270#include <asm-generic/io.h> 271 272#endif 273