273 lines
5.2 KiB
ArmAsm
273 lines
5.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* PowerPC 64-bit swsusp implementation
|
|
*
|
|
* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
|
|
*/
|
|
|
|
#include <linux/threads.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/page.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/ppc_asm.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <asm/feature-fixups.h>
|
|
|
|
/*
|
|
* Structure for storing CPU registers on the save area.
|
|
*/
|
|
#define SL_r1 0x00 /* stack pointer */
|
|
#define SL_PC 0x08
|
|
#define SL_MSR 0x10
|
|
#define SL_SDR1 0x18
|
|
#define SL_XER 0x20
|
|
#define SL_TB 0x40
|
|
#define SL_r2 0x48
|
|
#define SL_CR 0x50
|
|
#define SL_LR 0x58
|
|
#define SL_r12 0x60
|
|
#define SL_r13 0x68
|
|
#define SL_r14 0x70
|
|
#define SL_r15 0x78
|
|
#define SL_r16 0x80
|
|
#define SL_r17 0x88
|
|
#define SL_r18 0x90
|
|
#define SL_r19 0x98
|
|
#define SL_r20 0xa0
|
|
#define SL_r21 0xa8
|
|
#define SL_r22 0xb0
|
|
#define SL_r23 0xb8
|
|
#define SL_r24 0xc0
|
|
#define SL_r25 0xc8
|
|
#define SL_r26 0xd0
|
|
#define SL_r27 0xd8
|
|
#define SL_r28 0xe0
|
|
#define SL_r29 0xe8
|
|
#define SL_r30 0xf0
|
|
#define SL_r31 0xf8
|
|
#define SL_SPRG1 0x100
|
|
#define SL_TCR 0x108
|
|
#define SL_SIZE SL_TCR+8
|
|
|
|
/* these macros rely on the save area being
|
|
* pointed to by r11 */
|
|
|
|
#define SAVE_SPR(register) \
|
|
mfspr r0, SPRN_##register ;\
|
|
std r0, SL_##register(r11)
|
|
#define RESTORE_SPR(register) \
|
|
ld r0, SL_##register(r11) ;\
|
|
mtspr SPRN_##register, r0
|
|
#define SAVE_SPECIAL(special) \
|
|
mf##special r0 ;\
|
|
std r0, SL_##special(r11)
|
|
#define RESTORE_SPECIAL(special) \
|
|
ld r0, SL_##special(r11) ;\
|
|
mt##special r0
|
|
#define SAVE_REGISTER(reg) \
|
|
std reg, SL_##reg(r11)
|
|
#define RESTORE_REGISTER(reg) \
|
|
ld reg, SL_##reg(r11)
|
|
|
|
/* space for storing cpu state */
|
|
.section .data
|
|
.align 5
|
|
swsusp_save_area:
|
|
.space SL_SIZE
|
|
|
|
.section ".toc","aw"
|
|
swsusp_save_area_ptr:
|
|
.tc swsusp_save_area[TC],swsusp_save_area
|
|
restore_pblist_ptr:
|
|
.tc restore_pblist[TC],restore_pblist
|
|
|
|
.section .text
|
|
.align 5
|
|
_GLOBAL(swsusp_arch_suspend)
|
|
ld r11,swsusp_save_area_ptr@toc(r2)
|
|
SAVE_SPECIAL(LR)
|
|
SAVE_REGISTER(r1)
|
|
SAVE_SPECIAL(CR)
|
|
SAVE_SPECIAL(TB)
|
|
SAVE_REGISTER(r2)
|
|
SAVE_REGISTER(r12)
|
|
SAVE_REGISTER(r13)
|
|
SAVE_REGISTER(r14)
|
|
SAVE_REGISTER(r15)
|
|
SAVE_REGISTER(r16)
|
|
SAVE_REGISTER(r17)
|
|
SAVE_REGISTER(r18)
|
|
SAVE_REGISTER(r19)
|
|
SAVE_REGISTER(r20)
|
|
SAVE_REGISTER(r21)
|
|
SAVE_REGISTER(r22)
|
|
SAVE_REGISTER(r23)
|
|
SAVE_REGISTER(r24)
|
|
SAVE_REGISTER(r25)
|
|
SAVE_REGISTER(r26)
|
|
SAVE_REGISTER(r27)
|
|
SAVE_REGISTER(r28)
|
|
SAVE_REGISTER(r29)
|
|
SAVE_REGISTER(r30)
|
|
SAVE_REGISTER(r31)
|
|
SAVE_SPECIAL(MSR)
|
|
SAVE_SPECIAL(XER)
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
BEGIN_FW_FTR_SECTION
|
|
SAVE_SPECIAL(SDR1)
|
|
END_FW_FTR_SECTION_IFCLR(FW_FEATURE_LPAR)
|
|
#else
|
|
SAVE_SPR(TCR)
|
|
|
|
/* Save SPRG1, SPRG1 be used save paca */
|
|
SAVE_SPR(SPRG1)
|
|
#endif
|
|
|
|
/* we push the stack up 128 bytes but don't store the
|
|
* stack pointer on the stack like a real stackframe */
|
|
addi r1,r1,-128
|
|
|
|
bl swsusp_save
|
|
|
|
/* restore LR */
|
|
ld r11,swsusp_save_area_ptr@toc(r2)
|
|
RESTORE_SPECIAL(LR)
|
|
addi r1,r1,128
|
|
|
|
blr
|
|
|
|
/* Resume code */
|
|
_GLOBAL(swsusp_arch_resume)
|
|
/* Stop pending alitvec streams and memory accesses */
|
|
BEGIN_FTR_SECTION
|
|
PPC_DSSALL
|
|
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
|
|
sync
|
|
|
|
ld r12,restore_pblist_ptr@toc(r2)
|
|
ld r12,0(r12)
|
|
|
|
cmpdi r12,0
|
|
beq- nothing_to_copy
|
|
li r15,PAGE_SIZE>>3
|
|
copyloop:
|
|
ld r13,pbe_address(r12)
|
|
ld r14,pbe_orig_address(r12)
|
|
|
|
mtctr r15
|
|
li r10,0
|
|
copy_page_loop:
|
|
ldx r0,r10,r13
|
|
stdx r0,r10,r14
|
|
addi r10,r10,8
|
|
bdnz copy_page_loop
|
|
|
|
ld r12,pbe_next(r12)
|
|
cmpdi r12,0
|
|
bne+ copyloop
|
|
nothing_to_copy:
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
/* flush caches */
|
|
lis r3, 0x10
|
|
mtctr r3
|
|
li r3, 0
|
|
ori r3, r3, CONFIG_KERNEL_START>>48
|
|
li r0, 48
|
|
sld r3, r3, r0
|
|
li r0, 0
|
|
1:
|
|
dcbf 0,r3
|
|
addi r3,r3,0x20
|
|
bdnz 1b
|
|
|
|
sync
|
|
|
|
tlbia
|
|
#endif
|
|
|
|
ld r11,swsusp_save_area_ptr@toc(r2)
|
|
|
|
RESTORE_SPECIAL(CR)
|
|
|
|
/* restore timebase */
|
|
/* load saved tb */
|
|
ld r1, SL_TB(r11)
|
|
/* get upper 32 bits of it */
|
|
srdi r2, r1, 32
|
|
/* clear tb lower to avoid wrap */
|
|
li r0, 0
|
|
mttbl r0
|
|
/* set tb upper */
|
|
mttbu r2
|
|
/* set tb lower */
|
|
mttbl r1
|
|
|
|
/* restore registers */
|
|
RESTORE_REGISTER(r1)
|
|
RESTORE_REGISTER(r2)
|
|
RESTORE_REGISTER(r12)
|
|
RESTORE_REGISTER(r13)
|
|
RESTORE_REGISTER(r14)
|
|
RESTORE_REGISTER(r15)
|
|
RESTORE_REGISTER(r16)
|
|
RESTORE_REGISTER(r17)
|
|
RESTORE_REGISTER(r18)
|
|
RESTORE_REGISTER(r19)
|
|
RESTORE_REGISTER(r20)
|
|
RESTORE_REGISTER(r21)
|
|
RESTORE_REGISTER(r22)
|
|
RESTORE_REGISTER(r23)
|
|
RESTORE_REGISTER(r24)
|
|
RESTORE_REGISTER(r25)
|
|
RESTORE_REGISTER(r26)
|
|
RESTORE_REGISTER(r27)
|
|
RESTORE_REGISTER(r28)
|
|
RESTORE_REGISTER(r29)
|
|
RESTORE_REGISTER(r30)
|
|
RESTORE_REGISTER(r31)
|
|
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
/* can't use RESTORE_SPECIAL(MSR) */
|
|
ld r0, SL_MSR(r11)
|
|
mtmsrd r0, 0
|
|
BEGIN_FW_FTR_SECTION
|
|
RESTORE_SPECIAL(SDR1)
|
|
END_FW_FTR_SECTION_IFCLR(FW_FEATURE_LPAR)
|
|
#else
|
|
/* Restore SPRG1, be used to save paca */
|
|
ld r0, SL_SPRG1(r11)
|
|
mtsprg 1, r0
|
|
|
|
RESTORE_SPECIAL(MSR)
|
|
|
|
/* Restore TCR and clear any pending bits in TSR. */
|
|
RESTORE_SPR(TCR)
|
|
lis r0, (TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS)@h
|
|
mtspr SPRN_TSR, r0
|
|
|
|
/* Kick decrementer */
|
|
li r0, 1
|
|
mtdec r0
|
|
|
|
/* Invalidate all tlbs */
|
|
bl _tlbil_all
|
|
#endif
|
|
RESTORE_SPECIAL(XER)
|
|
|
|
sync
|
|
|
|
addi r1,r1,-128
|
|
#ifdef CONFIG_PPC_BOOK3S_64
|
|
bl slb_flush_and_restore_bolted
|
|
#endif
|
|
bl do_after_copyback
|
|
addi r1,r1,128
|
|
|
|
ld r11,swsusp_save_area_ptr@toc(r2)
|
|
RESTORE_SPECIAL(LR)
|
|
|
|
li r3, 0
|
|
blr
|