| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Tkhai Kirill | bdde6b3 | 2013-03-19 15:11:07 +0000 | [diff] [blame] | 2 | /* |
| 3 | * hibernate_asm.S: Hibernaton support specific for sparc64. |
| 4 | * |
| 5 | * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru) |
| 6 | */ |
| 7 | |
| 8 | #include <linux/linkage.h> |
| 9 | |
| 10 | #include <asm/asm-offsets.h> |
| 11 | #include <asm/cpudata.h> |
| 12 | #include <asm/page.h> |
| 13 | |
| 14 | ENTRY(swsusp_arch_suspend) |
| 15 | save %sp, -128, %sp |
| 16 | save %sp, -128, %sp |
| 17 | flushw |
| 18 | |
| 19 | setuw saved_context, %g3 |
| 20 | |
| 21 | /* Save window regs */ |
| 22 | rdpr %cwp, %g2 |
| 23 | stx %g2, [%g3 + SC_REG_CWP] |
| 24 | rdpr %wstate, %g2 |
| 25 | stx %g2, [%g3 + SC_REG_WSTATE] |
| 26 | stx %fp, [%g3 + SC_REG_FP] |
| 27 | |
| 28 | /* Save state regs */ |
| 29 | rdpr %tick, %g2 |
| 30 | stx %g2, [%g3 + SC_REG_TICK] |
| 31 | rdpr %pstate, %g2 |
| 32 | stx %g2, [%g3 + SC_REG_PSTATE] |
| 33 | |
| 34 | /* Save global regs */ |
| 35 | stx %g4, [%g3 + SC_REG_G4] |
| 36 | stx %g5, [%g3 + SC_REG_G5] |
| 37 | stx %g6, [%g3 + SC_REG_G6] |
| 38 | |
| 39 | call swsusp_save |
| 40 | nop |
| 41 | |
| 42 | mov %o0, %i0 |
| 43 | restore |
| 44 | |
| 45 | mov %o0, %i0 |
| 46 | ret |
| 47 | restore |
| 48 | |
| 49 | ENTRY(swsusp_arch_resume) |
| 50 | /* Write restore_pblist to %l0 */ |
| 51 | sethi %hi(restore_pblist), %l0 |
| 52 | ldx [%l0 + %lo(restore_pblist)], %l0 |
| 53 | |
| 54 | call __flush_tlb_all |
| 55 | nop |
| 56 | |
| 57 | /* Write PAGE_OFFSET to %g7 */ |
| David S. Miller | 9d0713e | 2014-09-24 21:05:30 -0700 | [diff] [blame] | 58 | sethi %hi(PAGE_OFFSET), %g7 |
| 59 | ldx [%g7 + %lo(PAGE_OFFSET)], %g7 |
| Tkhai Kirill | bdde6b3 | 2013-03-19 15:11:07 +0000 | [diff] [blame] | 60 | |
| 61 | setuw (PAGE_SIZE-8), %g3 |
| 62 | |
| 63 | /* Use MMU Bypass */ |
| 64 | rd %asi, %g1 |
| 65 | wr %g0, ASI_PHYS_USE_EC, %asi |
| 66 | |
| 67 | ba fill_itlb |
| 68 | nop |
| 69 | |
| 70 | pbe_loop: |
| 71 | cmp %l0, %g0 |
| 72 | be restore_ctx |
| 73 | sub %l0, %g7, %l0 |
| 74 | |
| 75 | ldxa [%l0 ] %asi, %l1 /* address */ |
| 76 | ldxa [%l0 + 8] %asi, %l2 /* orig_address */ |
| 77 | |
| 78 | /* phys addr */ |
| 79 | sub %l1, %g7, %l1 |
| 80 | sub %l2, %g7, %l2 |
| 81 | |
| 82 | mov %g3, %l3 /* PAGE_SIZE-8 */ |
| 83 | copy_loop: |
| 84 | ldxa [%l1 + %l3] ASI_PHYS_USE_EC, %g2 |
| 85 | stxa %g2, [%l2 + %l3] ASI_PHYS_USE_EC |
| 86 | cmp %l3, %g0 |
| 87 | bne copy_loop |
| 88 | sub %l3, 8, %l3 |
| 89 | |
| 90 | /* next pbe */ |
| 91 | ba pbe_loop |
| 92 | ldxa [%l0 + 16] %asi, %l0 |
| 93 | |
| 94 | restore_ctx: |
| 95 | setuw saved_context, %g3 |
| 96 | |
| 97 | /* Restore window regs */ |
| 98 | wrpr %g0, 0, %canrestore |
| 99 | wrpr %g0, 0, %otherwin |
| 100 | wrpr %g0, 6, %cansave |
| 101 | wrpr %g0, 0, %cleanwin |
| 102 | |
| 103 | ldxa [%g3 + SC_REG_CWP] %asi, %g2 |
| 104 | wrpr %g2, %cwp |
| 105 | ldxa [%g3 + SC_REG_WSTATE] %asi, %g2 |
| 106 | wrpr %g2, %wstate |
| 107 | ldxa [%g3 + SC_REG_FP] %asi, %fp |
| 108 | |
| 109 | /* Restore state regs */ |
| 110 | ldxa [%g3 + SC_REG_PSTATE] %asi, %g2 |
| 111 | wrpr %g2, %pstate |
| 112 | ldxa [%g3 + SC_REG_TICK] %asi, %g2 |
| 113 | wrpr %g2, %tick |
| 114 | |
| 115 | /* Restore global regs */ |
| 116 | ldxa [%g3 + SC_REG_G4] %asi, %g4 |
| 117 | ldxa [%g3 + SC_REG_G5] %asi, %g5 |
| 118 | ldxa [%g3 + SC_REG_G6] %asi, %g6 |
| 119 | |
| 120 | wr %g1, %g0, %asi |
| 121 | |
| 122 | restore |
| 123 | restore |
| 124 | |
| 125 | wrpr %g0, 14, %pil |
| 126 | |
| 127 | retl |
| 128 | mov %g0, %o0 |
| 129 | |
| 130 | fill_itlb: |
| 131 | ba pbe_loop |
| 132 | wrpr %g0, 15, %pil |