projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 64909882 G |
1 | /* |
| 2 | * linux/arch/unicore32/kernel/hibernate_asm.S | |
| 3 | * | |
| 4 | * Code specific to PKUnity SoC and UniCore ISA | |
| 5 | * | |
| 6 | * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> | |
| 7 | * Copyright (C) 2001-2010 Guan Xuetao | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU General Public License version 2 as | |
| 11 | * published by the Free Software Foundation. | |
| 12 | */ | |
| 13 | ||
| 14 | #include <linux/sys.h> | |
| 15 | #include <linux/errno.h> | |
| 16 | #include <linux/linkage.h> | |
| 17 | #include <generated/asm-offsets.h> | |
| 18 | #include <asm/page.h> | |
| 19 | #include <asm/pgtable.h> | |
| 20 | #include <asm/assembler.h> | |
| 21 | ||
| 22 | @ restore_image(pgd_t *resume_pg_dir, struct pbe *restore_pblist) | |
| 23 | @ r0: resume_pg_dir | |
| 24 | @ r1: restore_pblist | |
| 25 | @ copy restore_pblist pages | |
| 26 | @ restore registers from swsusp_arch_regs_cpu0 | |
| 27 | @ | |
| 28 | ENTRY(restore_image) | |
| 29 | sub r0, r0, #PAGE_OFFSET | |
| 30 | mov r5, #0 | |
| 31 | movc p0.c6, r5, #6 @invalidate ITLB & DTLB | |
| 32 | movc p0.c2, r0, #0 | |
| 33 | nop | |
| 34 | nop | |
| 35 | nop | |
| 36 | nop | |
| 37 | nop | |
| 38 | nop | |
| 39 | nop | |
| 40 | ||
| 41 | .p2align 4,,7 | |
| 42 | 101: | |
| 43 | csub.a r1, #0 | |
| 44 | beq 109f | |
| 45 | ||
| 46 | ldw r6, [r1+], #PBE_ADDRESS | |
| 47 | ldw r7, [r1+], #PBE_ORIN_ADDRESS | |
| 48 | ||
| 49 | movl ip, #128 | |
| 50 | 102: ldm.w (r8 - r15), [r6]+ | |
| 51 | stm.w (r8 - r15), [r7]+ | |
| 52 | sub.a ip, ip, #1 | |
| 53 | bne 102b | |
| 54 | ||
| 55 | ldw r1, [r1+], #PBE_NEXT | |
| 56 | b 101b | |
| 57 | ||
| 58 | .p2align 4,,7 | |
| 59 | 109: | |
| 60 | /* go back to the original page tables */ | |
| 61 | ldw r0, =swapper_pg_dir | |
| 62 | sub r0, r0, #PAGE_OFFSET | |
| 63 | mov r5, #0 | |
| 64 | movc p0.c6, r5, #6 | |
| 65 | movc p0.c2, r0, #0 | |
| 66 | nop | |
| 67 | nop | |
| 68 | nop | |
| 69 | nop | |
| 70 | nop | |
| 71 | nop | |
| 72 | nop | |
| 73 | ||
| 74 | #ifdef CONFIG_UNICORE_FPU_F64 | |
| 75 | ldw ip, 1f | |
| 76 | add ip, ip, #SWSUSP_FPSTATE | |
| 77 | lfm.w (f0 - f7 ), [ip]+ | |
| 78 | lfm.w (f8 - f15), [ip]+ | |
| 79 | lfm.w (f16 - f23), [ip]+ | |
| 80 | lfm.w (f24 - f31), [ip]+ | |
| 81 | ldw r4, [ip] | |
| 82 | ctf r4, s31 | |
| 83 | #endif | |
| 84 | mov r0, #0x0 | |
| 85 | ldw ip, 1f | |
| 86 | add ip, ip, #SWSUSP_CPU | |
| 87 | ldm.w (r4 - r15), [ip]+ | |
| 88 | ldm (r16 - r27, sp, pc), [ip]+ @ Load all regs saved previously | |
| 89 | ||
| 90 | .align 2 | |
| 91 | 1: .long swsusp_arch_regs_cpu0 | |
| 92 | ||
| 93 | ||
| 94 | @ swsusp_arch_suspend() | |
| 95 | @ - prepare pc for resume, return from function without swsusp_save on resume | |
| 96 | @ - save registers in swsusp_arch_regs_cpu0 | |
| 97 | @ - call swsusp_save write suspend image | |
| 98 | ||
| 99 | ENTRY(swsusp_arch_suspend) | |
| 100 | ldw ip, 1f | |
| 101 | add ip, ip, #SWSUSP_CPU | |
| 102 | stm.w (r4 - r15), [ip]+ | |
| 103 | stm.w (r16 - r27, sp, lr), [ip]+ | |
| 104 | ||
| 105 | #ifdef CONFIG_UNICORE_FPU_F64 | |
| 106 | ldw ip, 1f | |
| 107 | add ip, ip, #SWSUSP_FPSTATE | |
| 108 | sfm.w (f0 - f7 ), [ip]+ | |
| 109 | sfm.w (f8 - f15), [ip]+ | |
| 110 | sfm.w (f16 - f23), [ip]+ | |
| 111 | sfm.w (f24 - f31), [ip]+ | |
| 112 | cff r4, s31 | |
| 113 | stw r4, [ip] | |
| 114 | #endif | |
| 115 | b swsusp_save @ no return | |
| 116 | ||
| 117 | 1: .long swsusp_arch_regs_cpu0 |