2 * linux/include/asm-sh/io.h
4 * Copyright (C) 1996-2000 Russell King
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 * 16-Sep-1996 RMK Inlined the inx/outx functions & optimised for both
12 * constant addresses and variable addresses.
13 * 04-Dec-1997 RMK Moved a lot of this stuff to the new architecture
14 * specific IO header files.
15 * 27-Mar-1999 PJB Second parameter of memcpy_toio is const..
16 * 04-Apr-1999 PJB Added check_signature.
17 * 12-Dec-1999 RMK More cleanups
18 * 18-Jun-2000 RMK Removed virt_to_* and friends definitions
25 #include <linux/types.h>
26 #include <asm/byteorder.h>
29 * Generic virtual read/write. Note that we don't support half-word
30 * read/writes. We define __arch_*[bl] here, and leave __arch_*w
31 * to the architecture specific code.
33 #define __arch_getb(a) (*(volatile unsigned char *)(a))
34 #define __arch_getw(a) (*(volatile unsigned short *)(a))
35 #define __arch_getl(a) (*(volatile unsigned int *)(a))
37 #define __arch_putb(v, a) (*(volatile unsigned char *)(a) = (v))
38 #define __arch_putw(v, a) (*(volatile unsigned short *)(a) = (v))
39 #define __arch_putl(v, a) (*(volatile unsigned int *)(a) = (v))
41 extern void __raw_writesb(unsigned int addr, const void *data, int bytelen);
42 extern void __raw_writesw(unsigned int addr, const void *data, int wordlen);
43 extern void __raw_writesl(unsigned int addr, const void *data, int longlen);
45 extern void __raw_readsb(unsigned int addr, void *data, int bytelen);
46 extern void __raw_readsw(unsigned int addr, void *data, int wordlen);
47 extern void __raw_readsl(unsigned int addr, void *data, int longlen);
49 #define __raw_writeb(v, a) __arch_putb(v, a)
50 #define __raw_writew(v, a) __arch_putw(v, a)
51 #define __raw_writel(v, a) __arch_putl(v, a)
53 #define __raw_readb(a) __arch_getb(a)
54 #define __raw_readw(a) __arch_getw(a)
55 #define __raw_readl(a) __arch_getl(a)
58 * The compiler seems to be incapable of optimising constants
59 * properly. Spell it out to the compiler in some cases.
60 * These are only valid for small values of "off" (< 1<<12)
62 #define __raw_base_writeb(val, base, off) __arch_base_putb(val, base, off)
63 #define __raw_base_writew(val, base, off) __arch_base_putw(val, base, off)
64 #define __raw_base_writel(val, base, off) __arch_base_putl(val, base, off)
66 #define __raw_base_readb(base, off) __arch_base_getb(base, off)
67 #define __raw_base_readw(base, off) __arch_base_getw(base, off)
68 #define __raw_base_readl(base, off) __arch_base_getl(base, off)
71 * Now, pick up the machine-defined IO definitions
74 #include <asm/arch/io.h>
75 #endif /* XXX###XXX */
78 * IO port access primitives
79 * -------------------------
81 * The SH doesn't have special IO access instructions; all IO is memory
82 * mapped. Note that these are defined to perform little endian accesses
83 * only. Their primary purpose is to access PCI and ISA peripherals.
85 * The machine specific io.h include defines __io to translate an "IO"
86 * address to a memory address.
88 * Note that we prevent GCC re-ordering or caching values in expressions
89 * by introducing sequence points into the in*() definitions. Note that
90 * __raw_* do not guarantee this behaviour.
92 * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
94 #define outb(v, p) __raw_writeb(v, p)
95 #define outw(v, p) __raw_writew(cpu_to_le16(v), p)
96 #define outl(v, p) __raw_writel(cpu_to_le32(v), p)
98 #define inb(p) ({ unsigned int __v = __raw_readb(p); __v; })
99 #define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
100 #define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })
102 #define outsb(p, d, l) __raw_writesb(p, d, l)
103 #define outsw(p, d, l) __raw_writesw(p, d, l)
104 #define outsl(p, d, l) __raw_writesl(p, d, l)
106 #define insb(p, d, l) __raw_readsb(p, d, l)
107 #define insw(p, d, l) __raw_readsw(p, d, l)
108 #define insl(p, d, l) __raw_readsl(p, d, l)
110 #define outb_p(val, port) outb((val), (port))
111 #define outw_p(val, port) outw((val), (port))
112 #define outl_p(val, port) outl((val), (port))
113 #define inb_p(port) inb((port))
114 #define inw_p(port) inw((port))
115 #define inl_p(port) inl((port))
117 #define outsb_p(port, from, len) outsb(port, from, len)
118 #define outsw_p(port, from, len) outsw(port, from, len)
119 #define outsl_p(port, from, len) outsl(port, from, len)
120 #define insb_p(port, to, len) insb(port, to, len)
121 #define insw_p(port, to, len) insw(port, to, len)
122 #define insl_p(port, to, len) insl(port, to, len)
125 #define out_8(port, val) outb(val, port)
126 #define out_le16(port, val) outw(val, port)
127 #define out_le32(port, val) outl(val, port)
128 #define in_8(port) inb(port)
129 #define in_le16(port) inw(port)
130 #define in_le32(port) inl(port)
133 * DMA-consistent mapping functions. These allocate/free a region of
134 * uncached, unwrite-buffered mapped memory space for use with DMA
135 * devices. This is the "generic" version. The PCI specific version
138 extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
139 extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
140 extern void consistent_sync(void *vaddr, size_t size, int rw);
143 * String version of IO memory access ops:
145 extern void _memcpy_fromio(void *, unsigned long, size_t);
146 extern void _memcpy_toio(unsigned long, const void *, size_t);
147 extern void _memset_io(unsigned long, int, size_t);
150 * If this architecture has PCI memory IO, then define the read/write
151 * macros. These should only be used with the cookie passed from
156 #define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; })
158 ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
160 ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
162 #define writeb(v, c) __raw_writeb(v, __mem_pci(c))
163 #define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c))
164 #define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c))
166 #define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l))
167 #define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l))
168 #define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l))
170 #define eth_io_copy_and_sum(s, c, l, b) \
171 eth_copy_and_sum((s), __mem_pci(c), (l), (b))
174 check_signature(unsigned long io_addr, const unsigned char *signature,
179 if (readb(io_addr) != *signature)
190 #elif !defined(readb)
192 #define readb(addr) __raw_readb(addr)
193 #define readw(addr) __raw_readw(addr)
194 #define readl(addr) __raw_readl(addr)
195 #define writeb(v, addr) __raw_writeb(v, addr)
196 #define writew(v, addr) __raw_writew(v, addr)
197 #define writel(v, addr) __raw_writel(v, addr)
199 #define check_signature(io, sig, len) (0)
201 #endif /* __mem_pci */
203 static inline void sync(void)
208 * Clear and set bits in one shot. These macros can be used to clear and
209 * set multiple bits in a register using a single call. These macros can
210 * also be used to set a multiple-bit bit pattern using a mask, by
211 * specifying the mask in the 'clear' parameter and the new bit pattern
212 * in the 'set' parameter.
215 #define clrbits(type, addr, clear) \
216 out_##type((addr), in_##type(addr) & ~(clear))
218 #define setbits(type, addr, set) \
219 out_##type((addr), in_##type(addr) | (set))
221 #define clrsetbits(type, addr, clear, set) \
222 out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
224 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
225 #define setbits_be32(addr, set) setbits(be32, addr, set)
226 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
228 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
229 #define setbits_le32(addr, set) setbits(le32, addr, set)
230 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
232 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
233 #define setbits_be16(addr, set) setbits(be16, addr, set)
234 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
236 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
237 #define setbits_le16(addr, set) setbits(le16, addr, set)
238 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
240 #define clrbits_8(addr, clear) clrbits(8, addr, clear)
241 #define setbits_8(addr, set) setbits(8, addr, set)
242 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
245 * Given a physical address and a length, return a virtual address
246 * that can be used to access the memory range with the caching
247 * properties specified by "flags".
249 #define MAP_NOCACHE (0)
250 #define MAP_WRCOMBINE (0)
251 #define MAP_WRBACK (0)
252 #define MAP_WRTHROUGH (0)
255 map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
257 return (void *)paddr;
261 * Take down a mapping set up by map_physmem().
263 static inline void unmap_physmem(void *vaddr, unsigned long flags)
268 static inline phys_addr_t virt_to_phys(void *vaddr)
270 return (phys_addr_t)(vaddr);
273 #endif /* __KERNEL__ */
274 #endif /* __ASM_SH_IO_H */