Skip to content

L
linux
Commit e3b334c9 authored by Russell King's avatar Russell King
Browse files
Options

Add more big endian support to ARM, specifically stat structures and 

checksum functions.
parent 050bfcfe
Hide whitespace changes
Inline Side-by-side
Showing with 104 additions and 76 deletions
arch/arm/lib/csumpartial.S
View file @ e3b334c9
......@@ -41,7 +41,7 @@ td3 .req lr
tst buf, #1 @ odd address?
ldrneb td0, [buf], #1
subne len, len, #1
adcnes sum, sum, td0, lsl #8
adcnes sum, sum, td0, lsl #byte(1)
.less4: tst len, #6
beq .less8_byte
......@@ -56,7 +56,11 @@ td3 .req lr
ldrb td0, [buf], #1
ldrb td3, [buf], #1
sub len, len, #2
#ifndef __ARMEB__
orr td0, td0, td3, lsl #8
#else
orr td0, td3, td0, lsl #8
#endif
#endif
adcs sum, sum, td0
tst len, #6
......@@ -64,7 +68,7 @@ td3 .req lr
.less8_byte: tst len, #1 @ odd number of bytes
ldrneb td0, [buf], #1 @ include last byte
adcnes sum, sum, td0 @ update checksum
adcnes sum, sum, td0, lsl #byte(0) @ update checksum
.done: adc r0, sum, #0 @ collect up the last carry
ldr td0, [sp], #4
......@@ -76,7 +80,7 @@ td3 .req lr
.not_aligned: tst buf, #1 @ odd address
ldrneb td0, [buf], #1 @ make even
subne len, len, #1
adcnes sum, sum, td0, lsl #8 @ update checksum
adcnes sum, sum, td0, lsl #byte(1) @ update checksum
tst buf, #2 @ 32-bit aligned?
#ifdef __ARM_ARCH_4__
......@@ -86,7 +90,11 @@ td3 .req lr
ldrneb td0, [buf], #1
ldrneb ip, [buf], #1
subne len, len, #2
#ifndef __ARMEB__
orrne td0, td0, ip, lsl #8
#else
orrne td0, ip, td0, lsl #8
#endif
#endif
adcnes sum, sum, td0 @ update checksum
mov pc, lr
......
arch/arm/lib/csumpartialcopygeneric.S
View file @ e3b334c9
......@@ -36,16 +36,16 @@ sum .req r3
load1b ip
sub len, len, #1
adcs sum, sum, ip, lsl #8 @ update checksum
adcs sum, sum, ip, lsl #byte(1) @ update checksum
strb ip, [dst], #1
tst dst, #2
moveq pc, lr @ dst is now 32bit aligned
.dst_16bit: load2b r8, ip
sub len, len, #2
adcs sum, sum, r8
adcs sum, sum, r8, lsl #byte(0)
strb r8, [dst], #1
adcs sum, sum, ip, lsl #8
adcs sum, sum, ip, lsl #byte(1)
strb ip, [dst], #1
mov pc, lr @ dst is now 32bit aligned
......@@ -63,16 +63,16 @@ sum .req r3
/* Align dst */
load1b ip
sub len, len, #1
adcs sum, sum, ip, lsl #8 @ update checksum
adcs sum, sum, ip, lsl #byte(1) @ update checksum
strb ip, [dst], #1
tst len, #6
beq .less8_byteonly
1: load2b r8, ip
sub len, len, #2
adcs sum, sum, r8
adcs sum, sum, r8, lsl #byte(0)
strb r8, [dst], #1
adcs sum, sum, ip, lsl #8
adcs sum, sum, ip, lsl #byte(1)
strb ip, [dst], #1
.less8_aligned: tst len, #6
bne 1b
......@@ -80,7 +80,7 @@ sum .req r3
tst len, #1
beq .done
load1b r8
adcs sum, sum, r8 @ update checksum
adcs sum, sum, r8, lsl #byte(0) @ update checksum
strb r8, [dst], #1
b .done
......@@ -137,18 +137,19 @@ FN_ENTRY
4: ands len, len, #3
beq .done
load1l r4
load1l r5
tst len, #2
mov r4, r5, lsr #byte(0)
beq .exit
adcs sum, sum, r4, lsl #16
adcs sum, sum, r5, push #16
strb r4, [dst], #1
mov r4, r4, lsr #8
mov r4, r5, lsr #byte(1)
strb r4, [dst], #1
mov r4, r4, lsr #8
mov r4, r5, lsr #byte(2)
.exit: tst len, #1
strneb r4, [dst], #1
andne r4, r4, #255
adcnes sum, sum, r4
adcnes sum, sum, r4, lsl #byte(0)
/*
* If the dst pointer was not 16-bit aligned, we
......@@ -167,27 +168,27 @@ FN_ENTRY
adc sum, sum, #0 @ include C from dst alignment
and ip, src, #3
bic src, src, #3
load1l r4
load1l r5
cmp ip, #2
beq .src2_aligned
bhi .src3_aligned
mov r4, r4, lsr #8 @ C = 0
mov r4, r5, pull #8 @ C = 0
bics ip, len, #15
beq 2f
1: load4l r5, r6, r7, r8
orr r4, r4, r5, lsl #24
mov r5, r5, lsr #8
orr r5, r5, r6, lsl #24
mov r6, r6, lsr #8
orr r6, r6, r7, lsl #24
mov r7, r7, lsr #8
orr r7, r7, r8, lsl #24
orr r4, r4, r5, push #24
mov r5, r5, pull #8
orr r5, r5, r6, push #24
mov r6, r6, pull #8
orr r6, r6, r7, push #24
mov r7, r7, pull #8
orr r7, r7, r8, push #24
stmia dst!, {r4, r5, r6, r7}
adcs sum, sum, r4
adcs sum, sum, r5
adcs sum, sum, r6
adcs sum, sum, r7
mov r4, r8, lsr #8
mov r4, r8, pull #8
sub ip, ip, #16
teq ip, #0
bne 1b
......@@ -196,49 +197,50 @@ FN_ENTRY
tst ip, #8
beq 3f
load2l r5, r6
orr r4, r4, r5, lsl #24
mov r5, r5, lsr #8
orr r5, r5, r6, lsl #24
orr r4, r4, r5, push #24
mov r5, r5, pull #8
orr r5, r5, r6, push #24
stmia dst!, {r4, r5}
adcs sum, sum, r4
adcs sum, sum, r5
mov r4, r6, lsr #8
mov r4, r6, pull #8
tst ip, #4
beq 4f
3: load1l r5
orr r4, r4, r5, lsl #24
orr r4, r4, r5, push #24
str r4, [dst], #4
adcs sum, sum, r4
mov r4, r5, lsr #8
4: ands len, len, #3
beq .done
mov r4, r5, lsr #byte(1)
tst len, #2
beq .exit
adcs sum, sum, r4, lsl #16
bic r5, r5, #0xff << byte(0)
adcs sum, sum, r5, push #8
strb r4, [dst], #1
mov r4, r4, lsr #8
mov r4, r5, lsr #byte(2)
strb r4, [dst], #1
mov r4, r4, lsr #8
mov r4, r5, lsr #byte(3)
b .exit
.src2_aligned: mov r4, r4, lsr #16
.src2_aligned: mov r4, r5, pull #16
adds sum, sum, #0
bics ip, len, #15
beq 2f
1: load4l r5, r6, r7, r8
orr r4, r4, r5, lsl #16
mov r5, r5, lsr #16
orr r5, r5, r6, lsl #16
mov r6, r6, lsr #16
orr r6, r6, r7, lsl #16
mov r7, r7, lsr #16
orr r7, r7, r8, lsl #16
orr r4, r4, r5, push #16
mov r5, r5, pull #16
orr r5, r5, r6, push #16
mov r6, r6, pull #16
orr r6, r6, r7, push #16
mov r7, r7, pull #16
orr r7, r7, r8, push #16
stmia dst!, {r4, r5, r6, r7}
adcs sum, sum, r4
adcs sum, sum, r5
adcs sum, sum, r6
adcs sum, sum, r7
mov r4, r8, lsr #16
mov r4, r8, pull #16
sub ip, ip, #16
teq ip, #0
bne 1b
......@@ -247,51 +249,51 @@ FN_ENTRY
tst ip, #8
beq 3f
load2l r5, r6
orr r4, r4, r5, lsl #16
mov r5, r5, lsr #16
orr r5, r5, r6, lsl #16
orr r4, r4, r5, push #16
mov r5, r5, pull #16
orr r5, r5, r6, push #16
stmia dst!, {r4, r5}
adcs sum, sum, r4
adcs sum, sum, r5
mov r4, r6, lsr #16
mov r4, r6, pull #16
tst ip, #4
beq 4f
3: load1l r5
orr r4, r4, r5, lsl #16
orr r4, r4, r5, push #16
str r4, [dst], #4
adcs sum, sum, r4
mov r4, r5, lsr #16
4: ands len, len, #3
beq .done
mov r4, r5, lsr #byte(2)
tst len, #2
beq .exit
adcs sum, sum, r4, lsl #16
adcs sum, sum, r5, pull #16
strb r4, [dst], #1
mov r4, r4, lsr #8
mov r4, r5, lsr #byte(3)
strb r4, [dst], #1
tst len, #1
beq .done
load1b r4
b .exit
.src3_aligned: mov r4, r4, lsr #24
.src3_aligned: mov r4, r5, pull #24
adds sum, sum, #0
bics ip, len, #15
beq 2f
1: load4l r5, r6, r7, r8
orr r4, r4, r5, lsl #8
mov r5, r5, lsr #24
orr r5, r5, r6, lsl #8
mov r6, r6, lsr #24
orr r6, r6, r7, lsl #8
mov r7, r7, lsr #24
orr r7, r7, r8, lsl #8
orr r4, r4, r5, push #8
mov r5, r5, pull #24
orr r5, r5, r6, push #8
mov r6, r6, pull #24
orr r6, r6, r7, push #8
mov r7, r7, pull #24
orr r7, r7, r8, push #8
stmia dst!, {r4, r5, r6, r7}
adcs sum, sum, r4
adcs sum, sum, r5
adcs sum, sum, r6
adcs sum, sum, r7
mov r4, r8, lsr #24
mov r4, r8, pull #24
sub ip, ip, #16
teq ip, #0
bne 1b
......@@ -300,28 +302,29 @@ FN_ENTRY
tst ip, #8
beq 3f
load2l r5, r6
orr r4, r4, r5, lsl #8
mov r5, r5, lsr #24
orr r5, r5, r6, lsl #8
orr r4, r4, r5, push #8
mov r5, r5, pull #24
orr r5, r5, r6, push #8
stmia dst!, {r4, r5}
adcs sum, sum, r4
adcs sum, sum, r5
mov r4, r6, lsr #24
mov r4, r6, pull #24
tst ip, #4
beq 4f
3: load1l r5
orr r4, r4, r5, lsl #8
orr r4, r4, r5, push #8
str r4, [dst], #4
adcs sum, sum, r4
mov r4, r5, lsr #24
4: ands len, len, #3
beq .done
mov r4, r5, lsr #byte(3)
tst len, #2
beq .exit
adcs sum, sum, r4, lsl #16
adcs sum, sum, r5, pull #24
strb r4, [dst], #1
load1l r4
load1l r5
mov r4, r5, lsr #byte(0)
strb r4, [dst], #1
adcs sum, sum, r4, lsl #24
mov r4, r4, lsr #8
adcs sum, sum, r4, push #24
mov r4, r5, lsr #byte(1)
b .exit
include/asm-arm/stat.h
View file @ e3b334c9
......@@ -42,8 +42,14 @@ struct stat {
* insane amounts of padding around dev_t's.
*/
struct stat64 {
unsigned short st_dev;
unsigned char __pad0[10];
#if defined(__ARMEB__)
unsigned char __pad0b[6];
unsigned short st_dev;
#else
unsigned short st_dev;
unsigned char __pad0b[6];
#endif
unsigned char __pad0[4];
#define STAT64_HAS_BROKEN_ST_INO 1
unsigned long __st_ino;
......@@ -53,14 +59,25 @@ struct stat64 {
unsigned long st_uid;
unsigned long st_gid;
unsigned short st_rdev;
unsigned char __pad3[10];
#if defined(__ARMEB__)
unsigned char __pad3b[6];
unsigned short st_rdev;
#else /* Must be little */
unsigned short st_rdev;
unsigned char __pad3b[6];
#endif
unsigned char __pad3[4];
long long st_size;
unsigned long st_blksize;
unsigned long st_blocks; /* Number 512-byte blocks allocated. */
unsigned long __pad4; /* future possible st_blocks high bits */
#if defined(__ARMEB__)
unsigned long __pad4; /* Future possible st_blocks hi bits */
unsigned long st_blocks; /* Number 512-byte blocks allocated. */
#else /* Must be little */
unsigned long st_blocks; /* Number 512-byte blocks allocated. */
unsigned long __pad4; /* Future possible st_blocks hi bits */
#endif
unsigned long st_atime;
unsigned long __pad5;
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7