| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd |
| 4 | * Author: Tony Xie <tony.xie@rock-chips.com> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <linux/linkage.h> |
| 8 | #include <asm/assembler.h> |
| 9 | #include <asm/memory.h> |
| 10 | |
| 11 | .data |
| 12 | /* |
| 13 | * this code will be copied from |
| 14 | * ddr to sram for system resumeing. |
| 15 | * so it is ".data section". |
| 16 | */ |
| 17 | .align 2 |
| 18 | |
| 19 | ENTRY(rockchip_slp_cpu_resume) |
| 20 | setmode PSR_I_BIT | PSR_F_BIT | SVC_MODE, r1 @ set svc, irqs off |
| 21 | mrc p15, 0, r1, c0, c0, 5 |
| 22 | and r1, r1, #0xf |
| 23 | cmp r1, #0 |
| 24 | /* olny cpu0 can continue to run, the others is halt here */ |
| 25 | beq cpu0run |
| 26 | secondary_loop: |
| 27 | wfe |
| 28 | b secondary_loop |
| 29 | cpu0run: |
| 30 | ldr r3, rkpm_bootdata_l2ctlr_f |
| 31 | cmp r3, #0 |
| 32 | beq sp_set |
| 33 | ldr r3, rkpm_bootdata_l2ctlr |
| 34 | mcr p15, 1, r3, c9, c0, 2 |
| 35 | sp_set: |
| 36 | ldr sp, rkpm_bootdata_cpusp |
| 37 | ldr r1, rkpm_bootdata_cpu_code |
| 38 | bx r1 |
| 39 | ENDPROC(rockchip_slp_cpu_resume) |
| 40 | |
| 41 | /* Parameters filled in by the kernel */ |
| 42 | |
| 43 | /* Flag for whether to restore L2CTLR on resume */ |
| 44 | .global rkpm_bootdata_l2ctlr_f |
| 45 | rkpm_bootdata_l2ctlr_f: |
| 46 | .long 0 |
| 47 | |
| 48 | /* Saved L2CTLR to restore on resume */ |
| 49 | .global rkpm_bootdata_l2ctlr |
| 50 | rkpm_bootdata_l2ctlr: |
| 51 | .long 0 |
| 52 | |
| 53 | /* CPU resume SP addr */ |
| 54 | .globl rkpm_bootdata_cpusp |
| 55 | rkpm_bootdata_cpusp: |
| 56 | .long 0 |
| 57 | |
| 58 | /* CPU resume function (physical address) */ |
| 59 | .globl rkpm_bootdata_cpu_code |
| 60 | rkpm_bootdata_cpu_code: |
| 61 | .long 0 |
| 62 | |
| 63 | ENTRY(rk3288_bootram_sz) |
| 64 | .word . - rockchip_slp_cpu_resume |