projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2e1ee1f7 DP |
2 | #include <asm/reg.h> |
| 3 | #include <asm/ppc_asm.h> | |
| 4 | #include <asm/processor.h> | |
| 5 | ||
| 6 | ||
| 7 | .text | |
| 8 | ||
| 9 | _GLOBAL(mpc52xx_deep_sleep) | |
| 10 | mpc52xx_deep_sleep: /* args r3-r6: SRAM, SDRAM regs, CDM regs, INTR regs */ | |
| 11 | ||
| 12 | /* enable interrupts */ | |
| 13 | mfmsr r7 | |
| 14 | ori r7, r7, 0x8000 /* EE */ | |
| 15 | mtmsr r7 | |
| 16 | sync; isync; | |
| 17 | ||
| 18 | li r10, 0 /* flag that irq handler sets */ | |
| 19 | ||
| 20 | /* enable tmr7 (or any other) interrupt */ | |
| 21 | lwz r8, 0x14(r6) /* intr->main_mask */ | |
| 22 | ori r8, r8, 0x1 | |
| 23 | xori r8, r8, 0x1 | |
| 24 | stw r8, 0x14(r6) | |
| 25 | sync | |
| 26 | ||
| 27 | /* emulate tmr7 interrupt */ | |
| 28 | li r8, 0x1 | |
| 29 | stw r8, 0x40(r6) /* intr->main_emulate */ | |
| 30 | sync | |
| 31 | ||
| 32 | /* wait for it to happen */ | |
| 33 | 1: | |
| 34 | cmpi cr0, r10, 1 | |
| 35 | bne cr0, 1b | |
| 36 | ||
| 37 | /* lock icache */ | |
| 38 | mfspr r10, SPRN_HID0 | |
| 39 | ori r10, r10, 0x2000 | |
| 40 | sync; isync; | |
| 41 | mtspr SPRN_HID0, r10 | |
| 42 | sync; isync; | |
| 43 | ||
| 44 | ||
| 45 | mflr r9 /* save LR */ | |
| 46 | ||
| 47 | /* jump to sram */ | |
| 48 | mtlr r3 | |
| 49 | blrl | |
| 50 | ||
| 51 | mtlr r9 /* restore LR */ | |
| 52 | ||
| 53 | /* unlock icache */ | |
| 54 | mfspr r10, SPRN_HID0 | |
| 55 | ori r10, r10, 0x2000 | |
| 56 | xori r10, r10, 0x2000 | |
| 57 | sync; isync; | |
| 58 | mtspr SPRN_HID0, r10 | |
| 59 | sync; isync; | |
| 60 | ||
| 61 | ||
| 62 | /* return to C code */ | |
| 63 | blr | |
| 64 | ||
| 65 | ||
| 66 | _GLOBAL(mpc52xx_ds_sram) | |
| 67 | mpc52xx_ds_sram: | |
| 68 | /* put SDRAM into self-refresh */ | |
| 69 | lwz r8, 0x4(r4) /* sdram->ctrl */ | |
| 70 | ||
| 71 | oris r8, r8, 0x8000 /* mode_en */ | |
| 72 | stw r8, 0x4(r4) | |
| 73 | sync | |
| 74 | ||
| 75 | ori r8, r8, 0x0002 /* soft_pre */ | |
| 76 | stw r8, 0x4(r4) | |
| 77 | sync | |
| 78 | xori r8, r8, 0x0002 | |
| 79 | ||
| 80 | xoris r8, r8, 0x8000 /* !mode_en */ | |
| 81 | stw r8, 0x4(r4) | |
| 82 | sync | |
| 83 | ||
| 84 | oris r8, r8, 0x5000 | |
| 85 | xoris r8, r8, 0x4000 /* ref_en !cke */ | |
| 86 | stw r8, 0x4(r4) | |
| 87 | sync | |
| 88 | ||
| 89 | /* disable SDRAM clock */ | |
| 90 | lwz r8, 0x14(r5) /* cdm->clkenable */ | |
| 91 | ori r8, r8, 0x0008 | |
| 92 | xori r8, r8, 0x0008 | |
| 93 | stw r8, 0x14(r5) | |
| 94 | sync | |
| 95 | ||
| 96 | ||
| 97 | /* put mpc5200 to sleep */ | |
| 98 | mfmsr r10 | |
| 99 | oris r10, r10, 0x0004 /* POW = 1 */ | |
| 100 | sync; isync; | |
| 101 | mtmsr r10 | |
| 102 | sync; isync; | |
| 103 | ||
| 104 | ||
| 105 | /* enable clock */ | |
| 106 | lwz r8, 0x14(r5) | |
| 107 | ori r8, r8, 0x0008 | |
| 108 | stw r8, 0x14(r5) | |
| 109 | sync | |
| 110 | ||
| 111 | /* get ram out of self-refresh */ | |
| 112 | lwz r8, 0x4(r4) | |
| 113 | oris r8, r8, 0x5000 /* cke ref_en */ | |
| 114 | stw r8, 0x4(r4) | |
| 115 | sync | |
| 116 | ||
| 117 | blr | |
| 118 | _GLOBAL(mpc52xx_ds_sram_size) | |
| 119 | mpc52xx_ds_sram_size: | |
| 120 | .long $-mpc52xx_ds_sram | |
| 121 | ||
| 122 | ||
| 123 | /* ### interrupt handler for wakeup from deep-sleep ### */ | |
| 124 | _GLOBAL(mpc52xx_ds_cached) | |
| 125 | mpc52xx_ds_cached: | |
| 126 | mtspr SPRN_SPRG0, r7 | |
| 127 | mtspr SPRN_SPRG1, r8 | |
| 128 | ||
| 129 | /* disable emulated interrupt */ | |
| 130 | mfspr r7, 311 /* MBAR */ | |
| 131 | addi r7, r7, 0x540 /* intr->main_emul */ | |
| 132 | li r8, 0 | |
| 133 | stw r8, 0(r7) | |
| 134 | sync | |
| 135 | dcbf 0, r7 | |
| 136 | ||
| 137 | /* acknowledge wakeup, so CCS releases power pown */ | |
| 138 | mfspr r7, 311 /* MBAR */ | |
| 139 | addi r7, r7, 0x524 /* intr->enc_status */ | |
| 140 | lwz r8, 0(r7) | |
| 141 | ori r8, r8, 0x0400 | |
| 142 | stw r8, 0(r7) | |
| 143 | sync | |
| 144 | dcbf 0, r7 | |
| 145 | ||
| 146 | /* flag - we handled the interrupt */ | |
| 147 | li r10, 1 | |
| 148 | ||
| 149 | mfspr r8, SPRN_SPRG1 | |
| 150 | mfspr r7, SPRN_SPRG0 | |
| 151 | ||
| 152 | rfi | |
| 153 | _GLOBAL(mpc52xx_ds_cached_size) | |
| 154 | mpc52xx_ds_cached_size: | |
| 155 | .long $-mpc52xx_ds_cached |