| /* |
| * Copyright (C) 2013,2014 - ARM Ltd |
| * Author: Marc Zyngier <marc.zyngier@arm.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <config.h> |
| #include <linux/linkage.h> |
| #include <asm/psci.h> |
| |
| .pushsection ._secure.text, "ax" |
| |
| .arch_extension sec |
| |
| .align 5 |
| .globl _psci_vectors |
| _psci_vectors: |
| b default_psci_vector @ reset |
| b default_psci_vector @ undef |
| b _smc_psci @ smc |
| b default_psci_vector @ pabort |
| b default_psci_vector @ dabort |
| b default_psci_vector @ hyp |
| b default_psci_vector @ irq |
| b psci_fiq_enter @ fiq |
| |
| ENTRY(psci_fiq_enter) |
| movs pc, lr |
| ENDPROC(psci_fiq_enter) |
| .weak psci_fiq_enter |
| |
| ENTRY(default_psci_vector) |
| movs pc, lr |
| ENDPROC(default_psci_vector) |
| .weak default_psci_vector |
| |
| ENTRY(psci_cpu_suspend) |
| ENTRY(psci_cpu_off) |
| ENTRY(psci_cpu_on) |
| ENTRY(psci_migrate) |
| mov r0, #ARM_PSCI_RET_NI @ Return -1 (Not Implemented) |
| mov pc, lr |
| ENDPROC(psci_migrate) |
| ENDPROC(psci_cpu_on) |
| ENDPROC(psci_cpu_off) |
| ENDPROC(psci_cpu_suspend) |
| .weak psci_cpu_suspend |
| .weak psci_cpu_off |
| .weak psci_cpu_on |
| .weak psci_migrate |
| |
| _psci_table: |
| .word ARM_PSCI_FN_CPU_SUSPEND |
| .word psci_cpu_suspend |
| .word ARM_PSCI_FN_CPU_OFF |
| .word psci_cpu_off |
| .word ARM_PSCI_FN_CPU_ON |
| .word psci_cpu_on |
| .word ARM_PSCI_FN_MIGRATE |
| .word psci_migrate |
| .word 0 |
| .word 0 |
| |
| _smc_psci: |
| push {r4-r7,lr} |
| |
| @ Switch to secure |
| mrc p15, 0, r7, c1, c1, 0 |
| bic r4, r7, #1 |
| mcr p15, 0, r4, c1, c1, 0 |
| isb |
| |
| adr r4, _psci_table |
| 1: ldr r5, [r4] @ Load PSCI function ID |
| ldr r6, [r4, #4] @ Load target PC |
| cmp r5, #0 @ If reach the end, bail out |
| moveq r0, #ARM_PSCI_RET_INVAL @ Return -2 (Invalid) |
| beq 2f |
| cmp r0, r5 @ If not matching, try next entry |
| addne r4, r4, #8 |
| bne 1b |
| |
| blx r6 @ Execute PSCI function |
| |
| @ Switch back to non-secure |
| 2: mcr p15, 0, r7, c1, c1, 0 |
| |
| pop {r4-r7, lr} |
| movs pc, lr @ Return to the kernel |
| |
| .popsection |