115 lines
2.1 KiB
ArmAsm
115 lines
2.1 KiB
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
||
|
|
/*
|
||
|
|
* linux/arch/unicore32/kernel/hibernate_asm.S
|
||
|
|
*
|
||
|
|
* Code specific to PKUnity SoC and UniCore ISA
|
||
|
|
*
|
||
|
|
* Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn>
|
||
|
|
* Copyright (C) 2001-2010 Guan Xuetao
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/sys.h>
|
||
|
|
#include <linux/errno.h>
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <generated/asm-offsets.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
#include <asm/pgtable.h>
|
||
|
|
#include <asm/assembler.h>
|
||
|
|
|
||
|
|
@ restore_image(pgd_t *resume_pg_dir, struct pbe *restore_pblist)
|
||
|
|
@ r0: resume_pg_dir
|
||
|
|
@ r1: restore_pblist
|
||
|
|
@ copy restore_pblist pages
|
||
|
|
@ restore registers from swsusp_arch_regs_cpu0
|
||
|
|
@
|
||
|
|
ENTRY(restore_image)
|
||
|
|
sub r0, r0, #PAGE_OFFSET
|
||
|
|
mov r5, #0
|
||
|
|
movc p0.c6, r5, #6 @invalidate ITLB & DTLB
|
||
|
|
movc p0.c2, r0, #0
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
|
||
|
|
.p2align 4,,7
|
||
|
|
101:
|
||
|
|
csub.a r1, #0
|
||
|
|
beq 109f
|
||
|
|
|
||
|
|
ldw r6, [r1+], #PBE_ADDRESS
|
||
|
|
ldw r7, [r1+], #PBE_ORIN_ADDRESS
|
||
|
|
|
||
|
|
movl ip, #128
|
||
|
|
102: ldm.w (r8 - r15), [r6]+
|
||
|
|
stm.w (r8 - r15), [r7]+
|
||
|
|
sub.a ip, ip, #1
|
||
|
|
bne 102b
|
||
|
|
|
||
|
|
ldw r1, [r1+], #PBE_NEXT
|
||
|
|
b 101b
|
||
|
|
|
||
|
|
.p2align 4,,7
|
||
|
|
109:
|
||
|
|
/* go back to the original page tables */
|
||
|
|
ldw r0, =swapper_pg_dir
|
||
|
|
sub r0, r0, #PAGE_OFFSET
|
||
|
|
mov r5, #0
|
||
|
|
movc p0.c6, r5, #6
|
||
|
|
movc p0.c2, r0, #0
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
nop
|
||
|
|
|
||
|
|
#ifdef CONFIG_UNICORE_FPU_F64
|
||
|
|
ldw ip, 1f
|
||
|
|
add ip, ip, #SWSUSP_FPSTATE
|
||
|
|
lfm.w (f0 - f7 ), [ip]+
|
||
|
|
lfm.w (f8 - f15), [ip]+
|
||
|
|
lfm.w (f16 - f23), [ip]+
|
||
|
|
lfm.w (f24 - f31), [ip]+
|
||
|
|
ldw r4, [ip]
|
||
|
|
ctf r4, s31
|
||
|
|
#endif
|
||
|
|
mov r0, #0x0
|
||
|
|
ldw ip, 1f
|
||
|
|
add ip, ip, #SWSUSP_CPU
|
||
|
|
ldm.w (r4 - r15), [ip]+
|
||
|
|
ldm (r16 - r27, sp, pc), [ip]+ @ Load all regs saved previously
|
||
|
|
|
||
|
|
.align 2
|
||
|
|
1: .long swsusp_arch_regs_cpu0
|
||
|
|
|
||
|
|
|
||
|
|
@ 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)
|
||
|
|
ldw ip, 1f
|
||
|
|
add ip, ip, #SWSUSP_CPU
|
||
|
|
stm.w (r4 - r15), [ip]+
|
||
|
|
stm.w (r16 - r27, sp, lr), [ip]+
|
||
|
|
|
||
|
|
#ifdef CONFIG_UNICORE_FPU_F64
|
||
|
|
ldw ip, 1f
|
||
|
|
add ip, ip, #SWSUSP_FPSTATE
|
||
|
|
sfm.w (f0 - f7 ), [ip]+
|
||
|
|
sfm.w (f8 - f15), [ip]+
|
||
|
|
sfm.w (f16 - f23), [ip]+
|
||
|
|
sfm.w (f24 - f31), [ip]+
|
||
|
|
cff r4, s31
|
||
|
|
stw r4, [ip]
|
||
|
|
#endif
|
||
|
|
b swsusp_save @ no return
|
||
|
|
|
||
|
|
1: .long swsusp_arch_regs_cpu0
|