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authorHarvey Harrison <harvey.harrison@gmail.com>2008-10-29 15:33:28 -0700
committerDavid S. Miller <davem@davemloft.net>2008-10-29 15:33:28 -0700
commit1758ef68a07f42983371dc1d2bf0ae80b4d8ea16 (patch)
treeb4f5693760c5a8e0f42272715407566f02a86714
parent60b8267338aafde5315fc65ff385f3d4d75eccfe (diff)
sparc64: remove byteshifting from out* helpers
__raw_write avoids the need to byteswap, as we are reading from a host-endian area, just deref the pointers directly, taking care of alignment. As before, outsw must be called with a 2-byte aligned pointer. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/sparc64/lib/PeeCeeI.c139
1 files changed, 47 insertions, 92 deletions
diff --git a/arch/sparc64/lib/PeeCeeI.c b/arch/sparc64/lib/PeeCeeI.c
index 8b313f11bc8d..46053e6ddd7b 100644
--- a/arch/sparc64/lib/PeeCeeI.c
+++ b/arch/sparc64/lib/PeeCeeI.c
@@ -20,107 +20,62 @@ void outsw(unsigned long __addr, const void *src, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
- if (count) {
- u16 *ps = (u16 *)src;
- u32 *pi;
-
- if (((u64)src) & 0x2) {
- u16 val = le16_to_cpup(ps);
- outw(val, addr);
- ps++;
- count--;
- }
- pi = (u32 *)ps;
- while (count >= 2) {
- u32 w = le32_to_cpup(pi);
-
- pi++;
- outw(w >> 0, addr);
- outw(w >> 16, addr);
- count -= 2;
- }
- ps = (u16 *)pi;
- if (count) {
- u16 val = le16_to_cpup(ps);
- outw(val, addr);
- }
+ while (count--) {
+ __raw_writew(*(u16 *)src, addr);
+ src += sizeof(u16);
}
}
void outsl(unsigned long __addr, const void *src, unsigned long count)
{
void __iomem *addr = (void __iomem *) __addr;
+ u32 l, l2;
- if (count) {
- if ((((u64)src) & 0x3) == 0) {
- u32 *p = (u32 *)src;
- while (count--) {
- u32 val = cpu_to_le32p(p);
- outl(val, addr);
- p++;
- }
- } else {
- u8 *pb;
- u16 *ps = (u16 *)src;
- u32 l = 0, l2;
- u32 *pi;
-
- switch (((u64)src) & 0x3) {
- case 0x2:
- count -= 1;
- l = cpu_to_le16p(ps) << 16;
- ps++;
- pi = (u32 *)ps;
- while (count--) {
- l2 = cpu_to_le32p(pi);
- pi++;
- outl(((l >> 16) | (l2 << 16)), addr);
- l = l2;
- }
- ps = (u16 *)pi;
- l2 = cpu_to_le16p(ps);
- outl(((l >> 16) | (l2 << 16)), addr);
- break;
-
- case 0x1:
- count -= 1;
- pb = (u8 *)src;
- l = (*pb++ << 8);
- ps = (u16 *)pb;
- l2 = cpu_to_le16p(ps);
- ps++;
- l |= (l2 << 16);
- pi = (u32 *)ps;
- while (count--) {
- l2 = cpu_to_le32p(pi);
- pi++;
- outl(((l >> 8) | (l2 << 24)), addr);
- l = l2;
- }
- pb = (u8 *)pi;
- outl(((l >> 8) | (*pb << 24)), addr);
- break;
+ if (!count)
+ return;
- case 0x3:
- count -= 1;
- pb = (u8 *)src;
- l = (*pb++ << 24);
- pi = (u32 *)pb;
- while (count--) {
- l2 = cpu_to_le32p(pi);
- pi++;
- outl(((l >> 24) | (l2 << 8)), addr);
- l = l2;
- }
- ps = (u16 *)pi;
- l2 = cpu_to_le16p(ps);
- ps++;
- pb = (u8 *)ps;
- l2 |= (*pb << 16);
- outl(((l >> 24) | (l2 << 8)), addr);
- break;
- }
+ switch (((unsigned long)src) & 0x3) {
+ case 0x0:
+ /* src is naturally aligned */
+ while (count--) {
+ __raw_writel(*(u32 *)src, addr);
+ src += sizeof(u32);
+ }
+ break;
+ case 0x2:
+ /* 2-byte alignment */
+ while (count--) {
+ l = (*(u16 *)src) << 16;
+ l |= *(u16 *)(src + sizeof(u16));
+ __raw_writel(l, addr);
+ src += sizeof(u32);
+ }
+ break;
+ case 0x1:
+ /* Hold three bytes in l each time, grab a byte from l2 */
+ l = (*(u8 *)src) << 24;
+ l |= (*(u16 *)(src + sizeof(u8))) << 8;
+ src += sizeof(u8) + sizeof(u16);
+ while (count--) {
+ l2 = *(u32 *)src;
+ l |= (l2 >> 24);
+ __raw_writel(l, addr);
+ l = l2 << 8;
+ src += sizeof(u32);
+ }
+ break;
+ case 0x3:
+ /* Hold a byte in l each time, grab 3 bytes from l2 */
+ l = (*(u8 *)src) << 24;
+ src += sizeof(u8);
+ while (count--) {
+ l2 = *(u32 *)src;
+ l |= (l2 >> 8);
+ __raw_writel(l, addr);
+ l = l2 << 24;
+ src += sizeof(u32);
}
+ break;
}
}

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