1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_IA64_IO_H 3 #define _ASM_IA64_IO_H 4 5 /* 6 * This file contains the definitions for the emulated IO instructions 7 * inb/inw/inl/outb/outw/outl and the "string versions" of the same 8 * (insb/insw/insl/outsb/outsw/outsl). You can also use "pausing" 9 * versions of the single-IO instructions (inb_p/inw_p/..). 10 * 11 * This file is not meant to be obfuscating: it's just complicated to 12 * (a) handle it all in a way that makes gcc able to optimize it as 13 * well as possible and (b) trying to avoid writing the same thing 14 * over and over again with slight variations and possibly making a 15 * mistake somewhere. 16 * 17 * Copyright (C) 1998-2003 Hewlett-Packard Co 18 * David Mosberger-Tang <davidm@hpl.hp.com> 19 * Copyright (C) 1999 Asit Mallick <asit.k.mallick@intel.com> 20 * Copyright (C) 1999 Don Dugger <don.dugger@intel.com> 21 */ 22 23 #include <asm/unaligned.h> 24 #include <asm/early_ioremap.h> 25 26 /* We don't use IO slowdowns on the ia64, but.. */ 27 #define __SLOW_DOWN_IO do { } while (0) 28 #define SLOW_DOWN_IO do { } while (0) 29 30 #define __IA64_UNCACHED_OFFSET RGN_BASE(RGN_UNCACHED) 31 32 /* 33 * The legacy I/O space defined by the ia64 architecture supports only 65536 ports, but 34 * large machines may have multiple other I/O spaces so we can't place any a priori limit 35 * on IO_SPACE_LIMIT. These additional spaces are described in ACPI. 36 */ 37 #define IO_SPACE_LIMIT 0xffffffffffffffffUL 38 39 #define MAX_IO_SPACES_BITS 8 40 #define MAX_IO_SPACES (1UL << MAX_IO_SPACES_BITS) 41 #define IO_SPACE_BITS 24 42 #define IO_SPACE_SIZE (1UL << IO_SPACE_BITS) 43 44 #define IO_SPACE_NR(port) ((port) >> IO_SPACE_BITS) 45 #define IO_SPACE_BASE(space) ((space) << IO_SPACE_BITS) 46 #define IO_SPACE_PORT(port) ((port) & (IO_SPACE_SIZE - 1)) 47 48 #define IO_SPACE_SPARSE_ENCODING(p) ((((p) >> 2) << 12) | ((p) & 0xfff)) 49 50 struct io_space { 51 unsigned long mmio_base; /* base in MMIO space */ 52 int sparse; 53 }; 54 55 extern struct io_space io_space[]; 56 extern unsigned int num_io_spaces; 57 58 # ifdef __KERNEL__ 59 60 /* 61 * All MMIO iomem cookies are in region 6; anything less is a PIO cookie: 62 * 0xCxxxxxxxxxxxxxxx MMIO cookie (return from ioremap) 63 * 0x000000001SPPPPPP PIO cookie (S=space number, P..P=port) 64 * 65 * ioread/writeX() uses the leading 1 in PIO cookies (PIO_OFFSET) to catch 66 * code that uses bare port numbers without the prerequisite pci_iomap(). 67 */ 68 #define PIO_OFFSET (1UL << (MAX_IO_SPACES_BITS + IO_SPACE_BITS)) 69 #define PIO_MASK (PIO_OFFSET - 1) 70 #define PIO_RESERVED __IA64_UNCACHED_OFFSET 71 #define HAVE_ARCH_PIO_SIZE 72 73 #include <asm/intrinsics.h> 74 #include <asm/machvec.h> 75 #include <asm/page.h> 76 #include <asm-generic/iomap.h> 77 78 /* 79 * Change virtual addresses to physical addresses and vv. 80 */ 81 static inline unsigned long 82 virt_to_phys (volatile void *address) 83 { 84 return (unsigned long) address - PAGE_OFFSET; 85 } 86 #define virt_to_phys virt_to_phys 87 88 static inline void* 89 phys_to_virt (unsigned long address) 90 { 91 return (void *) (address + PAGE_OFFSET); 92 } 93 #define phys_to_virt phys_to_virt 94 95 #define ARCH_HAS_VALID_PHYS_ADDR_RANGE 96 extern u64 kern_mem_attribute (unsigned long phys_addr, unsigned long size); 97 extern int valid_phys_addr_range (phys_addr_t addr, size_t count); /* efi.c */ 98 extern int valid_mmap_phys_addr_range (unsigned long pfn, size_t count); 99 100 /* 101 * The following two macros are deprecated and scheduled for removal. 102 * Please use the PCI-DMA interface defined in <asm/pci.h> instead. 103 */ 104 #define bus_to_virt phys_to_virt 105 #define virt_to_bus virt_to_phys 106 #define page_to_bus page_to_phys 107 108 # endif /* KERNEL */ 109 110 /* 111 * Memory fence w/accept. This should never be used in code that is 112 * not IA-64 specific. 113 */ 114 #define __ia64_mf_a() ia64_mfa() 115 116 static inline void* 117 __ia64_mk_io_addr (unsigned long port) 118 { 119 struct io_space *space; 120 unsigned long offset; 121 122 space = &io_space[IO_SPACE_NR(port)]; 123 port = IO_SPACE_PORT(port); 124 if (space->sparse) 125 offset = IO_SPACE_SPARSE_ENCODING(port); 126 else 127 offset = port; 128 129 return (void *) (space->mmio_base | offset); 130 } 131 132 /* 133 * For the in/out routines, we need to do "mf.a" _after_ doing the I/O access to ensure 134 * that the access has completed before executing other I/O accesses. Since we're doing 135 * the accesses through an uncachable (UC) translation, the CPU will execute them in 136 * program order. However, we still need to tell the compiler not to shuffle them around 137 * during optimization, which is why we use "volatile" pointers. 138 */ 139 140 #define inb inb 141 static inline unsigned int inb(unsigned long port) 142 { 143 volatile unsigned char *addr = __ia64_mk_io_addr(port); 144 unsigned char ret; 145 146 ret = *addr; 147 __ia64_mf_a(); 148 return ret; 149 } 150 151 #define inw inw 152 static inline unsigned int inw(unsigned long port) 153 { 154 volatile unsigned short *addr = __ia64_mk_io_addr(port); 155 unsigned short ret; 156 157 ret = *addr; 158 __ia64_mf_a(); 159 return ret; 160 } 161 162 #define inl inl 163 static inline unsigned int inl(unsigned long port) 164 { 165 volatile unsigned int *addr = __ia64_mk_io_addr(port); 166 unsigned int ret; 167 168 ret = *addr; 169 __ia64_mf_a(); 170 return ret; 171 } 172 173 #define outb outb 174 static inline void outb(unsigned char val, unsigned long port) 175 { 176 volatile unsigned char *addr = __ia64_mk_io_addr(port); 177 178 *addr = val; 179 __ia64_mf_a(); 180 } 181 182 #define outw outw 183 static inline void outw(unsigned short val, unsigned long port) 184 { 185 volatile unsigned short *addr = __ia64_mk_io_addr(port); 186 187 *addr = val; 188 __ia64_mf_a(); 189 } 190 191 #define outl outl 192 static inline void outl(unsigned int val, unsigned long port) 193 { 194 volatile unsigned int *addr = __ia64_mk_io_addr(port); 195 196 *addr = val; 197 __ia64_mf_a(); 198 } 199 200 #define insb insb 201 static inline void insb(unsigned long port, void *dst, unsigned long count) 202 { 203 unsigned char *dp = dst; 204 205 while (count--) 206 *dp++ = inb(port); 207 } 208 209 #define insw insw 210 static inline void insw(unsigned long port, void *dst, unsigned long count) 211 { 212 unsigned short *dp = dst; 213 214 while (count--) 215 put_unaligned(inw(port), dp++); 216 } 217 218 #define insl insl 219 static inline void insl(unsigned long port, void *dst, unsigned long count) 220 { 221 unsigned int *dp = dst; 222 223 while (count--) 224 put_unaligned(inl(port), dp++); 225 } 226 227 #define outsb outsb 228 static inline void outsb(unsigned long port, const void *src, 229 unsigned long count) 230 { 231 const unsigned char *sp = src; 232 233 while (count--) 234 outb(*sp++, port); 235 } 236 237 #define outsw outsw 238 static inline void outsw(unsigned long port, const void *src, 239 unsigned long count) 240 { 241 const unsigned short *sp = src; 242 243 while (count--) 244 outw(get_unaligned(sp++), port); 245 } 246 247 #define outsl outsl 248 static inline void outsl(unsigned long port, const void *src, 249 unsigned long count) 250 { 251 const unsigned int *sp = src; 252 253 while (count--) 254 outl(get_unaligned(sp++), port); 255 } 256 257 # ifdef __KERNEL__ 258 259 extern void __iomem * ioremap(unsigned long offset, unsigned long size); 260 extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size); 261 extern void iounmap (volatile void __iomem *addr); 262 static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size) 263 { 264 return ioremap(phys_addr, size); 265 } 266 #define ioremap ioremap 267 #define ioremap_nocache ioremap_nocache 268 #define ioremap_cache ioremap_cache 269 #define ioremap_uc ioremap_nocache 270 #define iounmap iounmap 271 272 /* 273 * String version of IO memory access ops: 274 */ 275 extern void memcpy_fromio(void *dst, const volatile void __iomem *src, long n); 276 extern void memcpy_toio(volatile void __iomem *dst, const void *src, long n); 277 extern void memset_io(volatile void __iomem *s, int c, long n); 278 279 #define memcpy_fromio memcpy_fromio 280 #define memcpy_toio memcpy_toio 281 #define memset_io memset_io 282 #define xlate_dev_kmem_ptr xlate_dev_kmem_ptr 283 #define xlate_dev_mem_ptr xlate_dev_mem_ptr 284 #include <asm-generic/io.h> 285 #undef PCI_IOBASE 286 287 # endif /* __KERNEL__ */ 288 289 #endif /* _ASM_IA64_IO_H */ 290