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 11 static inline unsigned long isa_bus_to_virt(unsigned long addr) { 12 BUG(); 13 return 0; 14 } 15 16 static 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 30 static 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 44 static 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 58 static 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 69 static 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 85 static 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 95 static 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 } 104 105 static 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 } 111 112 static 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 137 138 void memset_io(volatile void __iomem *addr, unsigned char val, int count); 139 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); 140 void 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 153 154 extern unsigned char eisa_in8(unsigned short port); 155 extern unsigned short eisa_in16(unsigned short port); 156 extern unsigned int eisa_in32(unsigned short port); 157 extern void eisa_out8(unsigned char data, unsigned short port); 158 extern void eisa_out16(unsigned short data, unsigned short port); 159 extern void eisa_out32(unsigned int data, unsigned short port); 160 161 #if defined(CONFIG_PCI) 162 extern unsigned char inb(int addr); 163 extern unsigned short inw(int addr); 164 extern unsigned int inl(int addr); 165 extern void outb(unsigned char b, int addr); 166 extern void outw(unsigned short b, int addr); 167 extern 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 182 static inline char inb(unsigned long addr) 183 { 184 BUG(); 185 return -1; 186 } 187 188 static inline short inw(unsigned long addr) 189 { 190 BUG(); 191 return -1; 192 } 193 194 static 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 */ 210 extern void insb (unsigned long port, void *dst, unsigned long count); 211 extern void insw (unsigned long port, void *dst, unsigned long count); 212 extern void insl (unsigned long port, void *dst, unsigned long count); 213 extern void outsb (unsigned long port, const void *src, unsigned long count); 214 extern void outsw (unsigned long port, const void *src, unsigned long count); 215 extern 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 238 extern u64 ioread64(const void __iomem *addr); 239 extern u64 ioread64be(const void __iomem *addr); 240 extern void iowrite64(u64 val, void __iomem *addr); 241 extern 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 267 268 extern int devmem_is_allowed(unsigned long pfn); 269 270 #include <asm-generic/io.h> 271 272 #endif 273