diff options
| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2018-07-19 18:03:47 -0700 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-08-08 08:27:24 +0200 |
| commit | 2c20674f0cf324d64f3de3ebd5a349fe252e0254 (patch) | |
| tree | b0dd815c276a7f59a7ae2dc1e0407d498d72241a /arch/arm/cpu/smccc-call_64.S | |
| parent | e70be9e1d95e34fe9c6235b02076bb0095fc48b6 (diff) | |
| download | barebox-2c20674f0cf324d64f3de3ebd5a349fe252e0254.tar.gz barebox-2c20674f0cf324d64f3de3ebd5a349fe252e0254.tar.xz | |
ARM: Add code to support SMCCC on AArch64
Port SMCCC code from Linux kernel. To accomodate that:
- Introduce CONFIG_ARM_SMCCC, to allow enabling the code
independent of CONFIG_ARM_SECURE_MONITOR
- Bring <linux/arm-smccc.h> in
- Add necessary constants to arch/arm/asm-offsets.c
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/cpu/smccc-call_64.S')
| -rw-r--r-- | arch/arm/cpu/smccc-call_64.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/arch/arm/cpu/smccc-call_64.S b/arch/arm/cpu/smccc-call_64.S new file mode 100644 index 0000000000..44888fb594 --- /dev/null +++ b/arch/arm/cpu/smccc-call_64.S @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2015, Linaro Limited + * + * 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. + * + */ +#include <linux/linkage.h> +#include <linux/arm-smccc.h> +#include <asm/asm-offsets.h> + + .macro SMCCC instr + .cfi_startproc + \instr #0 + ldr x4, [sp] + stp x0, x1, [x4, #ARM_SMCCC_RES_X0_OFFS] + stp x2, x3, [x4, #ARM_SMCCC_RES_X2_OFFS] + ldr x4, [sp, #8] + cbz x4, 1f /* no quirk structure */ + ldr x9, [x4, #ARM_SMCCC_QUIRK_ID_OFFS] + cmp x9, #ARM_SMCCC_QUIRK_QCOM_A6 + b.ne 1f + str x6, [x4, ARM_SMCCC_QUIRK_STATE_OFFS] +1: ret + .cfi_endproc + .endm + +/* + * void arm_smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2, + * unsigned long a3, unsigned long a4, unsigned long a5, + * unsigned long a6, unsigned long a7, struct arm_smccc_res *res, + * struct arm_smccc_quirk *quirk) + */ +ENTRY(__arm_smccc_smc) + SMCCC smc +ENDPROC(__arm_smccc_smc) + +/* + * void arm_smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2, + * unsigned long a3, unsigned long a4, unsigned long a5, + * unsigned long a6, unsigned long a7, struct arm_smccc_res *res, + * struct arm_smccc_quirk *quirk) + */ +ENTRY(__arm_smccc_hvc) + SMCCC hvc +ENDPROC(__arm_smccc_hvc)
\ No newline at end of file |