Blame view
lib/iomap.c
6.45 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 4 5 6 |
/* * Implement the default iomap interfaces * * (C) Copyright 2004 Linus Torvalds */ #include <linux/pci.h> |
9ac7849e3 devres: device re... |
7 |
#include <linux/io.h> |
1da177e4c Linux-2.6.12-rc2 |
8 |
#include <linux/module.h> |
1da177e4c Linux-2.6.12-rc2 |
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 |
/* * Read/write from/to an (offsettable) iomem cookie. It might be a PIO * access or a MMIO access, these functions don't care. The info is * encoded in the hardware mapping set up by the mapping functions * (or the cookie itself, depending on implementation and hw). * * The generic routines don't assume any hardware mappings, and just * encode the PIO/MMIO as part of the cookie. They coldly assume that * the MMIO IO mappings are not in the low address range. * * Architectures for which this is not true can't use this generic * implementation and should do their own copy. */ #ifndef HAVE_ARCH_PIO_SIZE /* * We encode the physical PIO addresses (0-0xffff) into the * pointer by offsetting them with a constant (0x10000) and * assuming that all the low addresses are always PIO. That means * we can do some sanity checks on the low bits, and don't * need to just take things for granted. */ #define PIO_OFFSET 0x10000UL #define PIO_MASK 0x0ffffUL #define PIO_RESERVED 0x40000UL #endif |
6cbf0c704 iomap: make the d... |
36 37 38 39 40 |
static void bad_io_access(unsigned long port, const char *access) { static int count = 10; if (count) { count--; |
5cd2b459d Use WARN() in lib/ |
41 42 |
WARN(1, KERN_ERR "Bad IO access at port %#lx (%s) ", port, access); |
6cbf0c704 iomap: make the d... |
43 44 |
} } |
1da177e4c Linux-2.6.12-rc2 |
45 46 47 |
/* * Ugly macros are a way of life. */ |
1da177e4c Linux-2.6.12-rc2 |
48 49 |
#define IO_COND(addr, is_pio, is_mmio) do { \ unsigned long port = (unsigned long __force)addr; \ |
6cbf0c704 iomap: make the d... |
50 51 52 |
if (port >= PIO_RESERVED) { \ is_mmio; \ } else if (port > PIO_OFFSET) { \ |
1da177e4c Linux-2.6.12-rc2 |
53 54 |
port &= PIO_MASK; \ is_pio; \ |
6cbf0c704 iomap: make the d... |
55 56 |
} else \ bad_io_access(port, #is_pio ); \ |
1da177e4c Linux-2.6.12-rc2 |
57 |
} while (0) |
34ba8a5cd [PATCH] Arch prov... |
58 59 60 61 62 63 64 65 66 |
#ifndef pio_read16be #define pio_read16be(port) swab16(inw(port)) #define pio_read32be(port) swab32(inl(port)) #endif #ifndef mmio_read16be #define mmio_read16be(addr) be16_to_cpu(__raw_readw(addr)) #define mmio_read32be(addr) be32_to_cpu(__raw_readl(addr)) #endif |
9f741cb8f lib: remove fastc... |
67 |
unsigned int ioread8(void __iomem *addr) |
1da177e4c Linux-2.6.12-rc2 |
68 69 |
{ IO_COND(addr, return inb(port), return readb(addr)); |
6cbf0c704 iomap: make the d... |
70 |
return 0xff; |
1da177e4c Linux-2.6.12-rc2 |
71 |
} |
9f741cb8f lib: remove fastc... |
72 |
unsigned int ioread16(void __iomem *addr) |
1da177e4c Linux-2.6.12-rc2 |
73 74 |
{ IO_COND(addr, return inw(port), return readw(addr)); |
6cbf0c704 iomap: make the d... |
75 |
return 0xffff; |
1da177e4c Linux-2.6.12-rc2 |
76 |
} |
9f741cb8f lib: remove fastc... |
77 |
unsigned int ioread16be(void __iomem *addr) |
dae409a27 [PATCH] add Big E... |
78 |
{ |
34ba8a5cd [PATCH] Arch prov... |
79 |
IO_COND(addr, return pio_read16be(port), return mmio_read16be(addr)); |
6cbf0c704 iomap: make the d... |
80 |
return 0xffff; |
dae409a27 [PATCH] add Big E... |
81 |
} |
9f741cb8f lib: remove fastc... |
82 |
unsigned int ioread32(void __iomem *addr) |
1da177e4c Linux-2.6.12-rc2 |
83 84 |
{ IO_COND(addr, return inl(port), return readl(addr)); |
6cbf0c704 iomap: make the d... |
85 |
return 0xffffffff; |
1da177e4c Linux-2.6.12-rc2 |
86 |
} |
9f741cb8f lib: remove fastc... |
87 |
unsigned int ioread32be(void __iomem *addr) |
dae409a27 [PATCH] add Big E... |
88 |
{ |
34ba8a5cd [PATCH] Arch prov... |
89 |
IO_COND(addr, return pio_read32be(port), return mmio_read32be(addr)); |
6cbf0c704 iomap: make the d... |
90 |
return 0xffffffff; |
dae409a27 [PATCH] add Big E... |
91 |
} |
1da177e4c Linux-2.6.12-rc2 |
92 93 |
EXPORT_SYMBOL(ioread8); EXPORT_SYMBOL(ioread16); |
dae409a27 [PATCH] add Big E... |
94 |
EXPORT_SYMBOL(ioread16be); |
1da177e4c Linux-2.6.12-rc2 |
95 |
EXPORT_SYMBOL(ioread32); |
dae409a27 [PATCH] add Big E... |
96 |
EXPORT_SYMBOL(ioread32be); |
1da177e4c Linux-2.6.12-rc2 |
97 |
|
34ba8a5cd [PATCH] Arch prov... |
98 99 100 101 102 103 104 105 106 |
#ifndef pio_write16be #define pio_write16be(val,port) outw(swab16(val),port) #define pio_write32be(val,port) outl(swab32(val),port) #endif #ifndef mmio_write16be #define mmio_write16be(val,port) __raw_writew(be16_to_cpu(val),port) #define mmio_write32be(val,port) __raw_writel(be32_to_cpu(val),port) #endif |
9f741cb8f lib: remove fastc... |
107 |
void iowrite8(u8 val, void __iomem *addr) |
1da177e4c Linux-2.6.12-rc2 |
108 109 110 |
{ IO_COND(addr, outb(val,port), writeb(val, addr)); } |
9f741cb8f lib: remove fastc... |
111 |
void iowrite16(u16 val, void __iomem *addr) |
1da177e4c Linux-2.6.12-rc2 |
112 113 114 |
{ IO_COND(addr, outw(val,port), writew(val, addr)); } |
9f741cb8f lib: remove fastc... |
115 |
void iowrite16be(u16 val, void __iomem *addr) |
dae409a27 [PATCH] add Big E... |
116 |
{ |
34ba8a5cd [PATCH] Arch prov... |
117 |
IO_COND(addr, pio_write16be(val,port), mmio_write16be(val, addr)); |
dae409a27 [PATCH] add Big E... |
118 |
} |
9f741cb8f lib: remove fastc... |
119 |
void iowrite32(u32 val, void __iomem *addr) |
1da177e4c Linux-2.6.12-rc2 |
120 121 122 |
{ IO_COND(addr, outl(val,port), writel(val, addr)); } |
9f741cb8f lib: remove fastc... |
123 |
void iowrite32be(u32 val, void __iomem *addr) |
dae409a27 [PATCH] add Big E... |
124 |
{ |
34ba8a5cd [PATCH] Arch prov... |
125 |
IO_COND(addr, pio_write32be(val,port), mmio_write32be(val, addr)); |
dae409a27 [PATCH] add Big E... |
126 |
} |
1da177e4c Linux-2.6.12-rc2 |
127 128 |
EXPORT_SYMBOL(iowrite8); EXPORT_SYMBOL(iowrite16); |
dae409a27 [PATCH] add Big E... |
129 |
EXPORT_SYMBOL(iowrite16be); |
1da177e4c Linux-2.6.12-rc2 |
130 |
EXPORT_SYMBOL(iowrite32); |
dae409a27 [PATCH] add Big E... |
131 |
EXPORT_SYMBOL(iowrite32be); |
1da177e4c Linux-2.6.12-rc2 |
132 133 134 135 136 137 138 |
/* * These are the "repeat MMIO read/write" functions. * Note the "__raw" accesses, since we don't want to * convert to CPU byte order. We write in "IO byte * order" (we also don't have IO barriers). */ |
34ba8a5cd [PATCH] Arch prov... |
139 |
#ifndef mmio_insb |
1da177e4c Linux-2.6.12-rc2 |
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 |
static inline void mmio_insb(void __iomem *addr, u8 *dst, int count) { while (--count >= 0) { u8 data = __raw_readb(addr); *dst = data; dst++; } } static inline void mmio_insw(void __iomem *addr, u16 *dst, int count) { while (--count >= 0) { u16 data = __raw_readw(addr); *dst = data; dst++; } } static inline void mmio_insl(void __iomem *addr, u32 *dst, int count) { while (--count >= 0) { u32 data = __raw_readl(addr); *dst = data; dst++; } } |
34ba8a5cd [PATCH] Arch prov... |
164 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
165 |
|
34ba8a5cd [PATCH] Arch prov... |
166 |
#ifndef mmio_outsb |
1da177e4c Linux-2.6.12-rc2 |
167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 |
static inline void mmio_outsb(void __iomem *addr, const u8 *src, int count) { while (--count >= 0) { __raw_writeb(*src, addr); src++; } } static inline void mmio_outsw(void __iomem *addr, const u16 *src, int count) { while (--count >= 0) { __raw_writew(*src, addr); src++; } } static inline void mmio_outsl(void __iomem *addr, const u32 *src, int count) { while (--count >= 0) { __raw_writel(*src, addr); src++; } } |
34ba8a5cd [PATCH] Arch prov... |
188 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
189 |
|
9f741cb8f lib: remove fastc... |
190 |
void ioread8_rep(void __iomem *addr, void *dst, unsigned long count) |
1da177e4c Linux-2.6.12-rc2 |
191 192 193 |
{ IO_COND(addr, insb(port,dst,count), mmio_insb(addr, dst, count)); } |
9f741cb8f lib: remove fastc... |
194 |
void ioread16_rep(void __iomem *addr, void *dst, unsigned long count) |
1da177e4c Linux-2.6.12-rc2 |
195 196 197 |
{ IO_COND(addr, insw(port,dst,count), mmio_insw(addr, dst, count)); } |
9f741cb8f lib: remove fastc... |
198 |
void ioread32_rep(void __iomem *addr, void *dst, unsigned long count) |
1da177e4c Linux-2.6.12-rc2 |
199 200 201 202 203 204 |
{ IO_COND(addr, insl(port,dst,count), mmio_insl(addr, dst, count)); } EXPORT_SYMBOL(ioread8_rep); EXPORT_SYMBOL(ioread16_rep); EXPORT_SYMBOL(ioread32_rep); |
9f741cb8f lib: remove fastc... |
205 |
void iowrite8_rep(void __iomem *addr, const void *src, unsigned long count) |
1da177e4c Linux-2.6.12-rc2 |
206 207 208 |
{ IO_COND(addr, outsb(port, src, count), mmio_outsb(addr, src, count)); } |
9f741cb8f lib: remove fastc... |
209 |
void iowrite16_rep(void __iomem *addr, const void *src, unsigned long count) |
1da177e4c Linux-2.6.12-rc2 |
210 211 212 |
{ IO_COND(addr, outsw(port, src, count), mmio_outsw(addr, src, count)); } |
9f741cb8f lib: remove fastc... |
213 |
void iowrite32_rep(void __iomem *addr, const void *src, unsigned long count) |
1da177e4c Linux-2.6.12-rc2 |
214 215 216 217 218 219 |
{ IO_COND(addr, outsl(port, src,count), mmio_outsl(addr, src, count)); } EXPORT_SYMBOL(iowrite8_rep); EXPORT_SYMBOL(iowrite16_rep); EXPORT_SYMBOL(iowrite32_rep); |
82ed223c2 iomap: make IOPOR... |
220 |
#ifdef CONFIG_HAS_IOPORT |
1da177e4c Linux-2.6.12-rc2 |
221 222 223 224 225 226 227 228 229 230 231 232 233 234 |
/* Create a virtual mapping cookie for an IO port range */ void __iomem *ioport_map(unsigned long port, unsigned int nr) { if (port > PIO_MASK) return NULL; return (void __iomem *) (unsigned long) (port + PIO_OFFSET); } void ioport_unmap(void __iomem *addr) { /* Nothing to do */ } EXPORT_SYMBOL(ioport_map); EXPORT_SYMBOL(ioport_unmap); |
82ed223c2 iomap: make IOPOR... |
235 |
#endif /* CONFIG_HAS_IOPORT */ |
1da177e4c Linux-2.6.12-rc2 |
236 |
|
82ed223c2 iomap: make IOPOR... |
237 |
#ifdef CONFIG_PCI |
66eab4df2 lib: add GENERIC_... |
238 239 |
/* Hide the details if this is a MMIO or PIO address space and just do what * you expect in the correct way. */ |
1da177e4c Linux-2.6.12-rc2 |
240 241 242 243 |
void pci_iounmap(struct pci_dev *dev, void __iomem * addr) { IO_COND(addr, /* nothing */, iounmap(addr)); } |
1da177e4c Linux-2.6.12-rc2 |
244 |
EXPORT_SYMBOL(pci_iounmap); |
82ed223c2 iomap: make IOPOR... |
245 |
#endif /* CONFIG_PCI */ |