| 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) 2015, Linaro Limited |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 4 | */ |
| 5 | #include <linux/linkage.h> |
| Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 6 | #include <linux/arm-smccc.h> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 7 | |
| Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 8 | #include <asm/asm-offsets.h> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 9 | #include <asm/opcodes-sec.h> |
| 10 | #include <asm/opcodes-virt.h> |
| 11 | #include <asm/unwind.h> |
| 12 | |
| 13 | /* |
| 14 | * Wrap c macros in asm macros to delay expansion until after the |
| 15 | * SMCCC asm macro is expanded. |
| 16 | */ |
| 17 | .macro SMCCC_SMC |
| 18 | __SMC(0) |
| 19 | .endm |
| 20 | |
| 21 | .macro SMCCC_HVC |
| 22 | __HVC(0) |
| 23 | .endm |
| 24 | |
| 25 | .macro SMCCC instr |
| 26 | UNWIND( .fnstart) |
| 27 | mov r12, sp |
| 28 | push {r4-r7} |
| 29 | UNWIND( .save {r4-r7}) |
| 30 | ldm r12, {r4-r7} |
| 31 | \instr |
| Olivier Deprez | 0e64123 | 2021-09-23 10:07:05 +0200 | [diff] [blame] | 32 | ldr r4, [sp, #36] |
| 33 | cmp r4, #0 |
| 34 | beq 1f // No quirk structure |
| 35 | ldr r5, [r4, #ARM_SMCCC_QUIRK_ID_OFFS] |
| 36 | cmp r5, #ARM_SMCCC_QUIRK_QCOM_A6 |
| 37 | bne 1f // No quirk present |
| 38 | str r6, [r4, #ARM_SMCCC_QUIRK_STATE_OFFS] |
| 39 | 1: pop {r4-r7} |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 40 | ldr r12, [sp, #(4 * 4)] |
| 41 | stm r12, {r0-r3} |
| 42 | bx lr |
| 43 | UNWIND( .fnend) |
| 44 | .endm |
| 45 | |
| 46 | /* |
| 47 | * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2, |
| 48 | * unsigned long a3, unsigned long a4, unsigned long a5, |
| 49 | * unsigned long a6, unsigned long a7, struct arm_smccc_res *res, |
| 50 | * struct arm_smccc_quirk *quirk) |
| 51 | */ |
| 52 | ENTRY(__arm_smccc_smc) |
| 53 | SMCCC SMCCC_SMC |
| 54 | ENDPROC(__arm_smccc_smc) |
| 55 | |
| 56 | /* |
| 57 | * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2, |
| 58 | * unsigned long a3, unsigned long a4, unsigned long a5, |
| 59 | * unsigned long a6, unsigned long a7, struct arm_smccc_res *res, |
| 60 | * struct arm_smccc_quirk *quirk) |
| 61 | */ |
| 62 | ENTRY(__arm_smccc_hvc) |
| 63 | SMCCC SMCCC_HVC |
| 64 | ENDPROC(__arm_smccc_hvc) |