| Thomas Gleixner | 9c92ab6 | 2019-05-29 07:17:56 -0700 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Jens Wiklander | b329f95 | 2016-01-04 15:42:55 +0100 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2015, Linaro Limited |
| Jens Wiklander | b329f95 | 2016-01-04 15:42:55 +0100 | [diff] [blame] | 4 | */ |
| 5 | #include <linux/linkage.h> |
| 6 | |
| 7 | #include <asm/opcodes-sec.h> |
| 8 | #include <asm/opcodes-virt.h> |
| 9 | #include <asm/unwind.h> |
| 10 | |
| 11 | /* |
| 12 | * Wrap c macros in asm macros to delay expansion until after the |
| 13 | * SMCCC asm macro is expanded. |
| 14 | */ |
| 15 | .macro SMCCC_SMC |
| 16 | __SMC(0) |
| 17 | .endm |
| 18 | |
| 19 | .macro SMCCC_HVC |
| 20 | __HVC(0) |
| 21 | .endm |
| 22 | |
| 23 | .macro SMCCC instr |
| 24 | UNWIND( .fnstart) |
| 25 | mov r12, sp |
| 26 | push {r4-r7} |
| 27 | UNWIND( .save {r4-r7}) |
| 28 | ldm r12, {r4-r7} |
| 29 | \instr |
| 30 | pop {r4-r7} |
| 31 | ldr r12, [sp, #(4 * 4)] |
| 32 | stm r12, {r0-r3} |
| 33 | bx lr |
| 34 | UNWIND( .fnend) |
| 35 | .endm |
| 36 | |
| 37 | /* |
| 38 | * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2, |
| 39 | * unsigned long a3, unsigned long a4, unsigned long a5, |
| Andy Gross | 680a087 | 2017-02-01 11:28:27 -0600 | [diff] [blame] | 40 | * unsigned long a6, unsigned long a7, struct arm_smccc_res *res, |
| 41 | * struct arm_smccc_quirk *quirk) |
| Jens Wiklander | b329f95 | 2016-01-04 15:42:55 +0100 | [diff] [blame] | 42 | */ |
| Andy Gross | 680a087 | 2017-02-01 11:28:27 -0600 | [diff] [blame] | 43 | ENTRY(__arm_smccc_smc) |
| Jens Wiklander | b329f95 | 2016-01-04 15:42:55 +0100 | [diff] [blame] | 44 | SMCCC SMCCC_SMC |
| Andy Gross | 680a087 | 2017-02-01 11:28:27 -0600 | [diff] [blame] | 45 | ENDPROC(__arm_smccc_smc) |
| Jens Wiklander | b329f95 | 2016-01-04 15:42:55 +0100 | [diff] [blame] | 46 | |
| 47 | /* |
| 48 | * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2, |
| 49 | * unsigned long a3, unsigned long a4, unsigned long a5, |
| Andy Gross | 680a087 | 2017-02-01 11:28:27 -0600 | [diff] [blame] | 50 | * unsigned long a6, unsigned long a7, struct arm_smccc_res *res, |
| 51 | * struct arm_smccc_quirk *quirk) |
| Jens Wiklander | b329f95 | 2016-01-04 15:42:55 +0100 | [diff] [blame] | 52 | */ |
| Andy Gross | 680a087 | 2017-02-01 11:28:27 -0600 | [diff] [blame] | 53 | ENTRY(__arm_smccc_hvc) |
| Jens Wiklander | b329f95 | 2016-01-04 15:42:55 +0100 | [diff] [blame] | 54 | SMCCC SMCCC_HVC |
| Andy Gross | 680a087 | 2017-02-01 11:28:27 -0600 | [diff] [blame] | 55 | ENDPROC(__arm_smccc_hvc) |
