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authorPaul Mundt <lethal@linux-sh.org>2006-09-27 05:25:24 -0400
committerPaul Mundt <lethal@linux-sh.org>2006-09-27 05:25:24 -0400
commit05ae91585167410dadd1bc8f2e207a062e638a16 (patch)
tree8814def2576aeb54ea3860b4563c54bc3fe3be35 /arch
parent2220d164933a8776d1336c814e3c2e5573256d34 (diff)
sh: Optimized readsl()/writesl() support.
Implement optimized copies of readsl()/writesl(). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/kernel/io.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/sh/kernel/io.c b/arch/sh/kernel/io.c
index 71c9fde2fd90..501fe03e3715 100644
--- a/arch/sh/kernel/io.c
+++ b/arch/sh/kernel/io.c
@@ -61,6 +61,73 @@ void memset_io(volatile void __iomem *dst, int c, unsigned long count)
61} 61}
62EXPORT_SYMBOL(memset_io); 62EXPORT_SYMBOL(memset_io);
63 63
64void __raw_readsl(unsigned long addr, void *datap, int len)
65{
66 u32 *data;
67
68 for (data = datap; (len != 0) && (((u32)data & 0x1f) != 0); len--)
69 *data++ = ctrl_inl(addr);
70
71 if (likely(len >= (0x20 >> 2))) {
72 int tmp2, tmp3, tmp4, tmp5, tmp6;
73
74 __asm__ __volatile__(
75 "1: \n\t"
76 "mov.l @%7, r0 \n\t"
77 "mov.l @%7, %2 \n\t"
78#ifdef CONFIG_CPU_SH4
79 "movca.l r0, @%0 \n\t"
80#else
81 "mov.l r0, @%0 \n\t"
82#endif
83 "mov.l @%7, %3 \n\t"
84 "mov.l @%7, %4 \n\t"
85 "mov.l @%7, %5 \n\t"
86 "mov.l @%7, %6 \n\t"
87 "mov.l @%7, r7 \n\t"
88 "mov.l @%7, r0 \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"
92 "sub %2, %1 \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"
99 "bf.s 1b \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");
106 }
107
108 for (; len != 0; len--)
109 *data++ = ctrl_inl(addr);
110}
111EXPORT_SYMBOL(__raw_readsl);
112
113void __raw_writesl(unsigned long addr, const void *data, int len)
114{
115 if (likely(len != 0)) {
116 int tmp1;
117
118 __asm__ __volatile__ (
119 "1: \n\t"
120 "mov.l @%0+, %1 \n\t"
121 "dt %3 \n\t"
122 "bf.s 1b \n\t"
123 " mov.l %1, @%4 \n\t"
124 : "=&r" (data), "=&r" (tmp1)
125 : "0" (data), "r" (len), "r"(addr)
126 : "t", "memory");
127 }
128}
129EXPORT_SYMBOL(__raw_writesl);
130
64void __iomem *ioport_map(unsigned long port, unsigned int nr) 131void __iomem *ioport_map(unsigned long port, unsigned int nr)
65{ 132{
66 return sh_mv.mv_ioport_map(port, nr); 133 return sh_mv.mv_ioport_map(port, nr);