| /* SPDX-License-Identifier: GPL-2.0 */ |
| #include <asm/reg.h> |
| #include <asm/ppc_asm.h> |
| #include <asm/processor.h> |
| |
| |
| .text |
| |
| _GLOBAL(mpc52xx_deep_sleep) |
| mpc52xx_deep_sleep: /* args r3-r6: SRAM, SDRAM regs, CDM regs, INTR regs */ |
| |
| /* enable interrupts */ |
| mfmsr r7 |
| ori r7, r7, 0x8000 /* EE */ |
| mtmsr r7 |
| sync; isync; |
| |
| li r10, 0 /* flag that irq handler sets */ |
| |
| /* enable tmr7 (or any other) interrupt */ |
| lwz r8, 0x14(r6) /* intr->main_mask */ |
| ori r8, r8, 0x1 |
| xori r8, r8, 0x1 |
| stw r8, 0x14(r6) |
| sync |
| |
| /* emulate tmr7 interrupt */ |
| li r8, 0x1 |
| stw r8, 0x40(r6) /* intr->main_emulate */ |
| sync |
| |
| /* wait for it to happen */ |
| 1: |
| cmpi cr0, r10, 1 |
| bne cr0, 1b |
| |
| /* lock icache */ |
| mfspr r10, SPRN_HID0 |
| ori r10, r10, 0x2000 |
| sync; isync; |
| mtspr SPRN_HID0, r10 |
| sync; isync; |
| |
| |
| mflr r9 /* save LR */ |
| |
| /* jump to sram */ |
| mtlr r3 |
| blrl |
| |
| mtlr r9 /* restore LR */ |
| |
| /* unlock icache */ |
| mfspr r10, SPRN_HID0 |
| ori r10, r10, 0x2000 |
| xori r10, r10, 0x2000 |
| sync; isync; |
| mtspr SPRN_HID0, r10 |
| sync; isync; |
| |
| |
| /* return to C code */ |
| blr |
| |
| |
| _GLOBAL(mpc52xx_ds_sram) |
| mpc52xx_ds_sram: |
| /* put SDRAM into self-refresh */ |
| lwz r8, 0x4(r4) /* sdram->ctrl */ |
| |
| oris r8, r8, 0x8000 /* mode_en */ |
| stw r8, 0x4(r4) |
| sync |
| |
| ori r8, r8, 0x0002 /* soft_pre */ |
| stw r8, 0x4(r4) |
| sync |
| xori r8, r8, 0x0002 |
| |
| xoris r8, r8, 0x8000 /* !mode_en */ |
| stw r8, 0x4(r4) |
| sync |
| |
| oris r8, r8, 0x5000 |
| xoris r8, r8, 0x4000 /* ref_en !cke */ |
| stw r8, 0x4(r4) |
| sync |
| |
| /* disable SDRAM clock */ |
| lwz r8, 0x14(r5) /* cdm->clkenable */ |
| ori r8, r8, 0x0008 |
| xori r8, r8, 0x0008 |
| stw r8, 0x14(r5) |
| sync |
| |
| |
| /* put mpc5200 to sleep */ |
| mfmsr r10 |
| oris r10, r10, 0x0004 /* POW = 1 */ |
| sync; isync; |
| mtmsr r10 |
| sync; isync; |
| |
| |
| /* enable clock */ |
| lwz r8, 0x14(r5) |
| ori r8, r8, 0x0008 |
| stw r8, 0x14(r5) |
| sync |
| |
| /* get ram out of self-refresh */ |
| lwz r8, 0x4(r4) |
| oris r8, r8, 0x5000 /* cke ref_en */ |
| stw r8, 0x4(r4) |
| sync |
| |
| blr |
| _GLOBAL(mpc52xx_ds_sram_size) |
| mpc52xx_ds_sram_size: |
| .long $-mpc52xx_ds_sram |
| |
| |
| /* ### interrupt handler for wakeup from deep-sleep ### */ |
| _GLOBAL(mpc52xx_ds_cached) |
| mpc52xx_ds_cached: |
| mtspr SPRN_SPRG0, r7 |
| mtspr SPRN_SPRG1, r8 |
| |
| /* disable emulated interrupt */ |
| mfspr r7, 311 /* MBAR */ |
| addi r7, r7, 0x540 /* intr->main_emul */ |
| li r8, 0 |
| stw r8, 0(r7) |
| sync |
| dcbf 0, r7 |
| |
| /* acknowledge wakeup, so CCS releases power pown */ |
| mfspr r7, 311 /* MBAR */ |
| addi r7, r7, 0x524 /* intr->enc_status */ |
| lwz r8, 0(r7) |
| ori r8, r8, 0x0400 |
| stw r8, 0(r7) |
| sync |
| dcbf 0, r7 |
| |
| /* flag - we handled the interrupt */ |
| li r10, 1 |
| |
| mfspr r8, SPRN_SPRG1 |
| mfspr r7, SPRN_SPRG0 |
| |
| rfi |
| _GLOBAL(mpc52xx_ds_cached_size) |
| mpc52xx_ds_cached_size: |
| .long $-mpc52xx_ds_cached |
