1 /*
2 * linux/include/asm-sh/io.h
3 *
4 * Copyright (C) 1996-2000 Russell King
5 *
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.
9 *
10 * Modifications:
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
19 */
20 #ifndef __ASM_SH_IO_H
21 #define __ASM_SH_IO_H
22
23 #ifdef __KERNEL__
24
25 #include <linux/types.h>
26 #include <asm/byteorder.h>
27
28 /*
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.
32 */
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))
36
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))
40
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);
44
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);
48
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)
52
53 #define __raw_readb(a) __arch_getb(a)
54 #define __raw_readw(a) __arch_getw(a)
55 #define __raw_readl(a) __arch_getl(a)
56
57 /*
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)
61 */
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)
65
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)
69
70 /*
71 * IO port access primitives
72 * -------------------------
73 *
74 * The SH doesn't have special IO access instructions; all IO is memory
75 * mapped. Note that these are defined to perform little endian accesses
76 * only. Their primary purpose is to access PCI and ISA peripherals.
77 *
78 * Note that we prevent GCC re-ordering or caching values in expressions
79 * by introducing sequence points into the in*() definitions. Note that
80 * __raw_* do not guarantee this behaviour.
81 *
82 * The {in,out}[bwl] macros are for emulating x86-style PCI/ISA IO space.
83 */
84 #define outb(v, p) __raw_writeb(v, p)
85 #define outw(v, p) __raw_writew(cpu_to_le16(v), p)
86 #define outl(v, p) __raw_writel(cpu_to_le32(v), p)
87
88 #define inb(p) ({ unsigned int __v = __raw_readb(p); __v; })
89 #define inw(p) ({ unsigned int __v = __le16_to_cpu(__raw_readw(p)); __v; })
90 #define inl(p) ({ unsigned int __v = __le32_to_cpu(__raw_readl(p)); __v; })
91
92 #define outsb(p, d, l) __raw_writesb(p, d, l)
93 #define outsw(p, d, l) __raw_writesw(p, d, l)
94 #define outsl(p, d, l) __raw_writesl(p, d, l)
95
96 #define insb(p, d, l) __raw_readsb(p, d, l)
97 #define insw(p, d, l) __raw_readsw(p, d, l)
98 #define insl(p, d, l) __raw_readsl(p, d, l)
99
100 #define outb_p(val, port) outb((val), (port))
101 #define outw_p(val, port) outw((val), (port))
102 #define outl_p(val, port) outl((val), (port))
103 #define inb_p(port) inb((port))
104 #define inw_p(port) inw((port))
105 #define inl_p(port) inl((port))
106
107 #define outsb_p(port, from, len) outsb(port, from, len)
108 #define outsw_p(port, from, len) outsw(port, from, len)
109 #define outsl_p(port, from, len) outsl(port, from, len)
110 #define insb_p(port, to, len) insb(port, to, len)
111 #define insw_p(port, to, len) insw(port, to, len)
112 #define insl_p(port, to, len) insl(port, to, len)
113
114 /* for U-Boot PCI */
115 #define out_8(port, val) outb(val, port)
116 #define out_le16(port, val) outw(val, port)
117 #define out_le32(port, val) outl(val, port)
118 #define in_8(port) inb(port)
119 #define in_le16(port) inw(port)
120 #define in_le32(port) inl(port)
121
122 /*
123 * DMA-consistent mapping functions. These allocate/free a region of
124 * uncached, unwrite-buffered mapped memory space for use with DMA
125 * devices. This is the "generic" version. The PCI specific version
126 * is in pci.h
127 */
128 extern void *consistent_alloc(int gfp, size_t size, dma_addr_t *handle);
129 extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
130 extern void consistent_sync(void *vaddr, size_t size, int rw);
131
132 /*
133 * String version of IO memory access ops:
134 */
135 extern void _memcpy_fromio(void *, unsigned long, size_t);
136 extern void _memcpy_toio(unsigned long, const void *, size_t);
137 extern void _memset_io(unsigned long, int, size_t);
138
139 /*
140 * If this architecture has PCI memory IO, then define the read/write
141 * macros. These should only be used with the cookie passed from
142 * ioremap.
143 */
144 #ifdef __mem_pci
145
146 #define readb(c) ({ unsigned int __v = __raw_readb(__mem_pci(c)); __v; })
147 #define readw(c)\
148 ({ unsigned int __v = le16_to_cpu(__raw_readw(__mem_pci(c))); __v; })
149 #define readl(c)\
150 ({ unsigned int __v = le32_to_cpu(__raw_readl(__mem_pci(c))); __v; })
151
152 #define writeb(v, c) __raw_writeb(v, __mem_pci(c))
153 #define writew(v, c) __raw_writew(cpu_to_le16(v), __mem_pci(c))
154 #define writel(v, c) __raw_writel(cpu_to_le32(v), __mem_pci(c))
155
156 #define memset_io(c, v, l) _memset_io(__mem_pci(c), (v), (l))
157 #define memcpy_fromio(a, c, l) _memcpy_fromio((a), __mem_pci(c), (l))
158 #define memcpy_toio(c, a, l) _memcpy_toio(__mem_pci(c), (a), (l))
159
160 #define eth_io_copy_and_sum(s, c, l, b) \
161 eth_copy_and_sum((s), __mem_pci(c), (l), (b))
162
163 static inline int
check_signature(unsigned long io_addr,const unsigned char * signature,int length)164 check_signature(unsigned long io_addr, const unsigned char *signature,
165 int length)
166 {
167 int retval = 0;
168 do {
169 if (readb(io_addr) != *signature)
170 goto out;
171 io_addr++;
172 signature++;
173 length--;
174 } while (length);
175 retval = 1;
176 out:
177 return retval;
178 }
179
180 #elif !defined(readb)
181
182 #define readb(addr) __raw_readb(addr)
183 #define readw(addr) __raw_readw(addr)
184 #define readl(addr) __raw_readl(addr)
185 #define writeb(v, addr) __raw_writeb(v, addr)
186 #define writew(v, addr) __raw_writew(v, addr)
187 #define writel(v, addr) __raw_writel(v, addr)
188
189 #define check_signature(io, sig, len) (0)
190
191 #endif /* __mem_pci */
192
sync(void)193 static inline void sync(void)
194 {
195 }
196
197 /*
198 * Clear and set bits in one shot. These macros can be used to clear and
199 * set multiple bits in a register using a single call. These macros can
200 * also be used to set a multiple-bit bit pattern using a mask, by
201 * specifying the mask in the 'clear' parameter and the new bit pattern
202 * in the 'set' parameter.
203 */
204
205 #define clrbits(type, addr, clear) \
206 out_##type((addr), in_##type(addr) & ~(clear))
207
208 #define setbits(type, addr, set) \
209 out_##type((addr), in_##type(addr) | (set))
210
211 #define clrsetbits(type, addr, clear, set) \
212 out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
213
214 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
215 #define setbits_be32(addr, set) setbits(be32, addr, set)
216 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
217
218 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
219 #define setbits_le32(addr, set) setbits(le32, addr, set)
220 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
221
222 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
223 #define setbits_be16(addr, set) setbits(be16, addr, set)
224 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
225
226 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
227 #define setbits_le16(addr, set) setbits(le16, addr, set)
228 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
229
230 #define clrbits_8(addr, clear) clrbits(8, addr, clear)
231 #define setbits_8(addr, set) setbits(8, addr, set)
232 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
233
234 #include <asm-generic/io.h>
235
236 #endif /* __KERNEL__ */
237 #endif /* __ASM_SH_IO_H */
238