openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

powerpc: Remove open coded byte swap macro in alignment handler 

Use swab64/32/16 instead of open coding it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2013-09-23 12:04:46 +10:00 committed by Benjamin Herrenschmidt
parent 5c0484e25e
commit f626190d27
1 changed files with 12 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
arch/powerpc/kernel/align.c
View File

@ -54,8 +54,6 @@ struct aligninfo {
/* DSISR bits reported for a DCBZ instruction: */
#define DCBZ 0x5f /* 8xx/82xx dcbz faults when cache not enabled */
#define SWAP(a, b) (t = (a), (a) = (b), (b) = t)
/*
* The PowerPC stores certain bits of the instruction that caused the
* alignment exception in the DSISR register. This array maps those
@ -458,7 +456,7 @@ static struct aligninfo spe_aligninfo[32] = {
static int emulate_spe(struct pt_regs *regs, unsigned int reg,
unsigned int instr)
{
int t, ret;
int ret;
union {
u64 ll;
u32 w[2];
@ -581,24 +579,18 @@ static int emulate_spe(struct pt_regs *regs, unsigned int reg,
if (flags & SW) {
switch (flags & 0xf0) {
case E8:
SWAP(data.v[0], data.v[7]);
SWAP(data.v[1], data.v[6]);
SWAP(data.v[2], data.v[5]);
SWAP(data.v[3], data.v[4]);
data.ll = swab64(data.ll);
break;
case E4:
SWAP(data.v[0], data.v[3]);
SWAP(data.v[1], data.v[2]);
SWAP(data.v[4], data.v[7]);
SWAP(data.v[5], data.v[6]);
data.w[0] = swab32(data.w[0]);
data.w[1] = swab32(data.w[1]);
break;
/* Its half word endian */
default:
SWAP(data.v[0], data.v[1]);
SWAP(data.v[2], data.v[3]);
SWAP(data.v[4], data.v[5]);
SWAP(data.v[6], data.v[7]);
data.h[0] = swab16(data.h[0]);
data.h[1] = swab16(data.h[1]);
data.h[2] = swab16(data.h[2]);
data.h[3] = swab16(data.h[3]);
break;
}
}
@ -710,7 +702,7 @@ int fix_alignment(struct pt_regs *regs)
unsigned int dsisr;
unsigned char __user *addr;
unsigned long p, swiz;
int ret, t;
int ret;
union {
u64 ll;
double dd;
@ -915,17 +907,13 @@ int fix_alignment(struct pt_regs *regs)
if (flags & SW) {
switch (nb) {
case 8:
SWAP(data.v[0], data.v[7]);
SWAP(data.v[1], data.v[6]);
SWAP(data.v[2], data.v[5]);
SWAP(data.v[3], data.v[4]);
data.ll = swab64(data.ll);
break;
case 4:
SWAP(data.v[4], data.v[7]);
SWAP(data.v[5], data.v[6]);
data.x32.low32 = swab32(data.x32.low32);
break;
case 2:
SWAP(data.v[6], data.v[7]);
data.x16.low16 = swab16(data.x16.low16);
break;
}
}