2 * linux/arch/sh/kernel/io.c
4 * Copyright (C) 2000 Stuart Menefy
5 * Copyright (C) 2005 Paul Mundt
7 * Provide real functions which expand to whatever the header file defined.
8 * Also definitions of machine independent IO functions.
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file "COPYING" in the main directory of this archive
14 #include <linux/module.h>
15 #include <asm/machvec.h>
19 * Copy data from IO memory space to "real" memory space.
20 * This needs to be optimized.
22 void memcpy_fromio(void *to, volatile void __iomem *from, unsigned long count)
27 *p = readb((void __iomem *)from);
32 EXPORT_SYMBOL(memcpy_fromio);
35 * Copy data from "real" memory space to IO memory space.
36 * This needs to be optimized.
38 void memcpy_toio(volatile void __iomem *to, const void *from, unsigned long count)
43 writeb(*p, (void __iomem *)to);
48 EXPORT_SYMBOL(memcpy_toio);
51 * "memset" on IO memory space.
52 * This needs to be optimized.
54 void memset_io(volatile void __iomem *dst, int c, unsigned long count)
58 writeb(c, (void __iomem *)dst);
62 EXPORT_SYMBOL(memset_io);
64 void __raw_readsl(unsigned long addr, void *datap, int len)
68 for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)
69 *data++ = ctrl_inl(addr);
71 if (likely(len >= (0x20 >> 2))) {
72 int tmp2, tmp3, tmp4, tmp5, tmp6;
79 "movca.l r0, @%0 \n\t"
89 "mov.l %2, @(0x04,%0) \n\t"
90 "mov #0x20>>2, %2 \n\t"
91 "mov.l %3, @(0x08,%0) \n\t"
93 "mov.l %4, @(0x0c,%0) \n\t"
94 "cmp/hi %1, %2 ! T if 32 > len \n\t"
95 "mov.l %5, @(0x10,%0) \n\t"
96 "mov.l %6, @(0x14,%0) \n\t"
97 "mov.l r7, @(0x18,%0) \n\t"
98 "mov.l r0, @(0x1c,%0) \n\t"
100 " add #0x20, %0 \n\t"
101 : "=&r" (data), "=&r" (len),
102 "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4),
103 "=&r" (tmp5), "=&r" (tmp6)
104 : "r"(addr), "0" (data), "1" (len)
105 : "r0", "r7", "t", "memory");
108 for (; len != 0; len--)
109 *data++ = ctrl_inl(addr);
111 EXPORT_SYMBOL(__raw_readsl);
113 void __raw_writesl(unsigned long addr, const void *data, int len)
115 if (likely(len != 0)) {
118 __asm__ __volatile__ (
120 "mov.l @%0+, %1 \n\t"
123 " mov.l %1, @%4 \n\t"
124 : "=&r" (data), "=&r" (tmp1)
125 : "0" (data), "r" (len), "r"(addr)
129 EXPORT_SYMBOL(__raw_writesl);
131 void __iomem *ioport_map(unsigned long port, unsigned int nr)
133 return sh_mv.mv_ioport_map(port, nr);
135 EXPORT_SYMBOL(ioport_map);
137 void ioport_unmap(void __iomem *addr)
139 sh_mv.mv_ioport_unmap(addr);
141 EXPORT_SYMBOL(ioport_unmap);