forked from Minki/linux
5ab5d57cc0
Update license to use SPDX-License-Identifier instead of verbose license text. Link: http://lkml.kernel.org/r/87bm60csyl.wl-kuninori.morimoto.gx@renesas.com Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Cc: Rich Felker <dalias@libc.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
145 lines
2.8 KiB
ArmAsm
145 lines
2.8 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0
|
|
*
|
|
* arch/sh/kernel/cpu/sh3/swsusp.S
|
|
*
|
|
* Copyright (C) 2009 Magnus Damm
|
|
*/
|
|
#include <linux/sys.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/page.h>
|
|
|
|
#define k0 r0
|
|
#define k1 r1
|
|
#define k2 r2
|
|
#define k3 r3
|
|
#define k4 r4
|
|
|
|
! swsusp_arch_resume()
|
|
! - copy restore_pblist pages
|
|
! - restore registers from swsusp_arch_regs_cpu0
|
|
|
|
ENTRY(swsusp_arch_resume)
|
|
mov.l 1f, r15
|
|
mov.l 2f, r4
|
|
mov.l @r4, r4
|
|
|
|
swsusp_copy_loop:
|
|
mov r4, r0
|
|
cmp/eq #0, r0
|
|
bt swsusp_restore_regs
|
|
|
|
mov.l @(PBE_ADDRESS, r4), r2
|
|
mov.l @(PBE_ORIG_ADDRESS, r4), r5
|
|
|
|
mov #(PAGE_SIZE >> 10), r3
|
|
shll8 r3
|
|
shlr2 r3 /* PAGE_SIZE / 16 */
|
|
swsusp_copy_page:
|
|
dt r3
|
|
mov.l @r2+,r1 /* 16n+0 */
|
|
mov.l r1,@r5
|
|
add #4,r5
|
|
mov.l @r2+,r1 /* 16n+4 */
|
|
mov.l r1,@r5
|
|
add #4,r5
|
|
mov.l @r2+,r1 /* 16n+8 */
|
|
mov.l r1,@r5
|
|
add #4,r5
|
|
mov.l @r2+,r1 /* 16n+12 */
|
|
mov.l r1,@r5
|
|
bf/s swsusp_copy_page
|
|
add #4,r5
|
|
|
|
bra swsusp_copy_loop
|
|
mov.l @(PBE_NEXT, r4), r4
|
|
|
|
swsusp_restore_regs:
|
|
! BL=0: R7->R0 is bank0
|
|
mov.l 3f, r8
|
|
mov.l 4f, r5
|
|
jsr @r5
|
|
nop
|
|
|
|
! BL=1: R7->R0 is bank1
|
|
lds k2, pr
|
|
ldc k3, ssr
|
|
|
|
mov.l @r15+, r0
|
|
mov.l @r15+, r1
|
|
mov.l @r15+, r2
|
|
mov.l @r15+, r3
|
|
mov.l @r15+, r4
|
|
mov.l @r15+, r5
|
|
mov.l @r15+, r6
|
|
mov.l @r15+, r7
|
|
|
|
rte
|
|
nop
|
|
! BL=0: R7->R0 is bank0
|
|
|
|
.align 2
|
|
1: .long swsusp_arch_regs_cpu0
|
|
2: .long restore_pblist
|
|
3: .long 0x20000000 ! RB=1
|
|
4: .long restore_regs
|
|
|
|
! swsusp_arch_suspend()
|
|
! - prepare pc for resume, return from function without swsusp_save on resume
|
|
! - save registers in swsusp_arch_regs_cpu0
|
|
! - call swsusp_save write suspend image
|
|
|
|
ENTRY(swsusp_arch_suspend)
|
|
sts pr, r0 ! save pr in r0
|
|
mov r15, r2 ! save sp in r2
|
|
mov r8, r5 ! save r8 in r5
|
|
stc sr, r1
|
|
ldc r1, ssr ! save sr in ssr
|
|
mov.l 1f, r1
|
|
ldc r1, spc ! setup pc value for resuming
|
|
mov.l 5f, r15 ! use swsusp_arch_regs_cpu0 as stack
|
|
mov.l 6f, r3
|
|
add r3, r15 ! save from top of structure
|
|
|
|
! BL=0: R7->R0 is bank0
|
|
mov.l 2f, r3 ! get new SR value for bank1
|
|
mov #0, r4
|
|
mov.l 7f, r1
|
|
jsr @r1 ! switch to bank1 and save bank1 r7->r0
|
|
not r4, r4
|
|
|
|
! BL=1: R7->R0 is bank1
|
|
stc r2_bank, k0 ! fetch old sp from r2_bank0
|
|
mov.l 3f, k4 ! SR bits to clear in k4
|
|
mov.l 8f, k1
|
|
jsr @k1 ! switch to bank0 and save all regs
|
|
stc r0_bank, k3 ! fetch old pr from r0_bank0
|
|
|
|
! BL=0: R7->R0 is bank0
|
|
mov r2, r15 ! restore old sp
|
|
mov r5, r8 ! restore old r8
|
|
stc ssr, r1
|
|
ldc r1, sr ! restore old sr
|
|
lds r0, pr ! restore old pr
|
|
mov.l 4f, r0
|
|
jmp @r0
|
|
nop
|
|
|
|
swsusp_call_save:
|
|
mov r2, r15 ! restore old sp
|
|
mov r5, r8 ! restore old r8
|
|
lds r0, pr ! restore old pr
|
|
rts
|
|
mov #0, r0
|
|
|
|
.align 2
|
|
1: .long swsusp_call_save
|
|
2: .long 0x20000000 ! RB=1
|
|
3: .long 0xdfffffff ! RB=0
|
|
4: .long swsusp_save
|
|
5: .long swsusp_arch_regs_cpu0
|
|
6: .long SWSUSP_ARCH_REGS_SIZE
|
|
7: .long save_low_regs
|
|
8: .long save_regs
|