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 #define ioremap_uc(addr, size) \ 136 ioremap_prot((addr), (size), _PAGE_IOREMAP) 137 138 #define pci_iounmap pci_iounmap 139 140 void memset_io(volatile void __iomem *addr, unsigned char val, int count); 141 void memcpy_fromio(void *dst, const volatile void __iomem *src, int count); 142 void memcpy_toio(volatile void __iomem *dst, const void *src, int count); 143 #define memset_io memset_io 144 #define memcpy_fromio memcpy_fromio 145 #define memcpy_toio memcpy_toio 146 147 /* Port-space IO */ 148 149 #define inb_p inb 150 #define inw_p inw 151 #define inl_p inl 152 #define outb_p outb 153 #define outw_p outw 154 #define outl_p outl 155 156 extern unsigned char eisa_in8(unsigned short port); 157 extern unsigned short eisa_in16(unsigned short port); 158 extern unsigned int eisa_in32(unsigned short port); 159 extern void eisa_out8(unsigned char data, unsigned short port); 160 extern void eisa_out16(unsigned short data, unsigned short port); 161 extern void eisa_out32(unsigned int data, unsigned short port); 162 163 #if defined(CONFIG_PCI) 164 extern unsigned char inb(int addr); 165 extern unsigned short inw(int addr); 166 extern unsigned int inl(int addr); 167 extern void outb(unsigned char b, int addr); 168 extern void outw(unsigned short b, int addr); 169 extern void outl(unsigned int b, int addr); 170 #define inb inb 171 #define inw inw 172 #define inl inl 173 #define outb outb 174 #define outw outw 175 #define outl outl 176 #elif defined(CONFIG_EISA) 177 #define inb eisa_in8 178 #define inw eisa_in16 179 #define inl eisa_in32 180 #define outb eisa_out8 181 #define outw eisa_out16 182 #define outl eisa_out32 183 #else 184 static inline char inb(unsigned long addr) 185 { 186 BUG(); 187 return -1; 188 } 189 190 static inline short inw(unsigned long addr) 191 { 192 BUG(); 193 return -1; 194 } 195 196 static inline int inl(unsigned long addr) 197 { 198 BUG(); 199 return -1; 200 } 201 #define inb inb 202 #define inw inw 203 #define inl inl 204 #define outb(x, y) ({(void)(x); (void)(y); BUG(); 0;}) 205 #define outw(x, y) ({(void)(x); (void)(y); BUG(); 0;}) 206 #define outl(x, y) ({(void)(x); (void)(y); BUG(); 0;}) 207 #endif 208 209 /* 210 * String versions of in/out ops: 211 */ 212 extern void insb (unsigned long port, void *dst, unsigned long count); 213 extern void insw (unsigned long port, void *dst, unsigned long count); 214 extern void insl (unsigned long port, void *dst, unsigned long count); 215 extern void outsb (unsigned long port, const void *src, unsigned long count); 216 extern void outsw (unsigned long port, const void *src, unsigned long count); 217 extern void outsl (unsigned long port, const void *src, unsigned long count); 218 #define insb insb 219 #define insw insw 220 #define insl insl 221 #define outsb outsb 222 #define outsw outsw 223 #define outsl outsl 224 225 /* IO Port space is : BBiiii where BB is HBA number. */ 226 #define IO_SPACE_LIMIT 0x00ffffff 227 228 /* PA machines have an MM I/O space from 0xf0000000-0xffffffff in 32 229 * bit mode and from 0xfffffffff0000000-0xfffffffffffffff in 64 bit 230 * mode (essentially just sign extending. This macro takes in a 32 231 * bit I/O address (still with the leading f) and outputs the correct 232 * value for either 32 or 64 bit mode */ 233 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL))) 234 235 #ifdef CONFIG_64BIT 236 #define ioread64 ioread64 237 #define ioread64be ioread64be 238 #define iowrite64 iowrite64 239 #define iowrite64be iowrite64be 240 extern u64 ioread64(const void __iomem *addr); 241 extern u64 ioread64be(const void __iomem *addr); 242 extern void iowrite64(u64 val, void __iomem *addr); 243 extern void iowrite64be(u64 val, void __iomem *addr); 244 #endif 245 246 #include <asm-generic/iomap.h> 247 /* 248 * These get provided from <asm-generic/iomap.h> since parisc does not 249 * select GENERIC_IOMAP. 250 */ 251 #define ioport_map ioport_map 252 #define ioport_unmap ioport_unmap 253 #define ioread8 ioread8 254 #define ioread16 ioread16 255 #define ioread32 ioread32 256 #define ioread16be ioread16be 257 #define ioread32be ioread32be 258 #define iowrite8 iowrite8 259 #define iowrite16 iowrite16 260 #define iowrite32 iowrite32 261 #define iowrite16be iowrite16be 262 #define iowrite32be iowrite32be 263 #define ioread8_rep ioread8_rep 264 #define ioread16_rep ioread16_rep 265 #define ioread32_rep ioread32_rep 266 #define iowrite8_rep iowrite8_rep 267 #define iowrite16_rep iowrite16_rep 268 #define iowrite32_rep iowrite32_rep 269 270 /* 271 * Convert a physical pointer to a virtual kernel pointer for /dev/mem 272 * access 273 */ 274 #define xlate_dev_mem_ptr(p) __va(p) 275 276 extern int devmem_is_allowed(unsigned long pfn); 277 278 #include <asm-generic/io.h> 279 280 #endif 281