| /* |
| * PowerPC 64-bit swsusp implementation |
| * |
| * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> |
| * |
| * GPLv2 |
| */ |
| |
| #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> |
| |
| /* |
| * 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_SIZE SL_r31+8 |
| |
| /* these macros rely on the save area being |
| * pointed to by r11 */ |
| #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(SDR1) |
| SAVE_SPECIAL(XER) |
| |
| /* 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 _iommu_save |
| 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 |
| 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 r15,512 |
| 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: |
| |
| /* 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 r0,r3 |
| addi r3,r3,0x20 |
| bdnz 1b |
| |
| sync |
| |
| tlbia |
| |
| 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) |
| /* can't use RESTORE_SPECIAL(MSR) */ |
| ld r0, SL_MSR(r11) |
| mtmsrd r0, 0 |
| RESTORE_SPECIAL(SDR1) |
| RESTORE_SPECIAL(XER) |
| |
| sync |
| |
| addi r1,r1,-128 |
| bl slb_flush_and_rebolt |
| bl do_after_copyback |
| addi r1,r1,128 |
| |
| ld r11,swsusp_save_area_ptr@toc(r2) |
| RESTORE_SPECIAL(LR) |
| |
| li r3, 0 |
| blr |
