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Add a new API to let platform-specific ports provide functions for big

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copy/zeroing.
This commit is contained in:
Olivier Houchard 2005-10-03 14:12:10 +00:00
parent 87351d5fd2
commit 0122bd1470
4 changed files with 159 additions and 0 deletions
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47
sys/arm/arm/bcopyinout.S
View file

@ -40,6 +40,11 @@
#include <machine/asm.h>
.L_arm_memcpy:
.word _C_LABEL(_arm_memcpy)
.L_min_memcpy_size:
.word _C_LABEL(_min_memcpy_size)
__FBSDID("$FreeBSD$");
#ifdef __XSCALE__
#include <arm/arm/bcopyinout_xscale.S>
@ -82,6 +87,27 @@ ENTRY(copyin)
moveq r0, #0
RETeq
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormal
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormal
stmfd sp!, {r0-r2, r4, lr}
mov r3, r0
mov r0, r1
mov r1, r3
mov r3, #2 /* SRC_IS_USER */
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
moveq r0, #0
RETeq
SAVE_REGS
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */
@ -306,6 +332,27 @@ ENTRY(copyout)
moveq r0, #0
RETeq
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormale
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormale
stmfd sp!, {r0-r2, r4, lr}
mov r3, r0
mov r0, r1
mov r1, r3
mov r3, #1 /* DST_IS_USER */
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
moveq r0, #0
RETeq
SAVE_REGS
#ifdef MULTIPROCESSOR
/* XXX Probably not appropriate for non-Hydra SMPs */

44
sys/arm/arm/bcopyinout_xscale.S
View file

@ -61,6 +61,28 @@ ENTRY(copyin)
movle r0, #0x00
movle pc, lr /* Bail early if length is <= 0 */
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormal
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormal
stmfd sp!, {r0-r2, r4, lr}
mov r3, r0
mov r0, r1
mov r1, r3
mov r3, #2 /* SRC_IS_USER */
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
moveq r0, #0
RETeq
.Lnormal:
stmfd sp!, {r10-r11, lr}
#ifdef MULTIPROCESSOR
@ -491,6 +513,28 @@ ENTRY(copyout)
movle r0, #0x00
movle pc, lr /* Bail early if length is <= 0 */
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormale
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormale
stmfd sp!, {r0-r2, r4, lr}
mov r3, r0
mov r0, r1
mov r1, r3
mov r3, #1 /* DST_IS_USER */
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
moveq r0, #0
RETeq
.Lnormale:
stmfd sp!, {r10-r11, lr}
#ifdef MULTIPROCESSOR

58
sys/arm/arm/support.S
View file

@ -30,6 +30,14 @@ __FBSDID("$FreeBSD$");
#include "assym.s"
.L_arm_memcpy:
.word _C_LABEL(_arm_memcpy)
.L_arm_bzero:
.word _C_LABEL(_arm_bzero)
.L_min_memcpy_size:
.word _C_LABEL(_min_memcpy_size)
.L_min_bzero_size:
.word _C_LABEL(_min_bzero_size)
/*
* memset: Sets a block of memory to the specified value
*
@ -43,6 +51,22 @@ __FBSDID("$FreeBSD$");
*/
/* LINTSTUB: Func: void bzero(void *, size_t) */
ENTRY(bzero)
ldr r3, .L_arm_bzero
ldr r3, [r3]
cmp r3, #0
beq .Lnormal0
ldr r2, .L_min_bzero_size
ldr r2, [r2]
cmp r1, r2
blt .Lnormal0
stmfd sp!, {r0, r1, lr}
mov r2, #0
mov lr, pc
mov pc, r3
cmp r0, #0
ldmfd sp!, {r0, r1, lr}
RETeq
.Lnormal0:
mov r3, #0x00
b do_memset
@ -847,6 +871,23 @@ ENTRY(memmove)
#if !defined(__XSCALE__)
ENTRY(memcpy)
/* save leaf functions having to store this away */
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormal
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormal
stmfd sp!, {r0-r2, r4, lr}
mov r3, #0
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
RETeq
stmdb sp!, {r0, lr} /* memcpy() returns dest addr */
subs r2, r2, #4
@ -1054,6 +1095,23 @@ ENTRY(memcpy)
pld [r1]
cmp r2, #0x0c
ble .Lmemcpy_short /* <= 12 bytes */
ldr r3, .L_arm_memcpy
ldr r3, [r3]
cmp r3, #0
beq .Lnormal
ldr r3, .L_min_memcpy_size
ldr r3, [r3]
cmp r2, r3
blt .Lnormal
stmfd sp!, {r0-r2, r4, lr}
mov r3, #0
ldr r4, .L_arm_memcpy
mov lr, pc
ldr pc, [r4]
cmp r0, #0
ldmfd sp!, {r0-r2, r4, lr}
RETeq
.Lnormal:
mov r3, r0 /* We must not clobber r0 */
/* Word-align the destination buffer */

10
sys/arm/include/md_var.h
View file

@ -36,4 +36,14 @@
extern char sigcode[];
extern int szsigcode;
extern int (*_arm_memcpy)(void *, void *, int, int);
extern int (*_arm_bzero)(void *, int, int);
extern int _min_memcpy_size;
extern int _min_bzero_size;
#define DST_IS_USER 0x1
#define SRC_IS_USER 0x2
#define IS_PHYSICAL 0x4
#endif /* !_MACHINE_MD_VAR_H_ */