diff options
author | Jens Wiklander <jens.wiklander@linaro.org> | 2016-01-04 15:44:32 +0100 |
---|---|---|
committer | Jon Medhurst <tixy@linaro.org> | 2016-04-20 16:05:36 +0100 |
commit | 5cc08749cc12670a6f06c15abc42b914791fa827 (patch) | |
tree | 7125c818f82c7454c0fec5845cb168ac61bc6f61 | |
parent | ea3a593049eeb588772f1b764581c9aebe0cbc8c (diff) |
ARM: 8480/2: arm64: add implementation for arm-smccc
Adds implementation for arm-smccc and enables CONFIG_HAVE_SMCCC.
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r-- | arch/arm64/Kconfig | 1 | ||||
-rw-r--r-- | arch/arm64/kernel/Makefile | 3 | ||||
-rw-r--r-- | arch/arm64/kernel/arm64ksyms.c | 5 | ||||
-rw-r--r-- | arch/arm64/kernel/asm-offsets.c | 3 | ||||
-rw-r--r-- | arch/arm64/kernel/smccc-call.S | 43 |
5 files changed, 54 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 00b9c4870230..01889538f1c2 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -73,6 +73,7 @@ config ARM64 select SPARSE_IRQ select SYSCTL_EXCEPTION_TRACE select HAVE_CONTEXT_TRACKING + select HAVE_ARM_SMCCC help ARM 64-bit (AArch64) Linux support. diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index da2272811a31..cdd16431d48b 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -15,7 +15,8 @@ arm64-obj-y := cputable.o debug-monitors.o entry.o irq.o fpsimd.o \ entry-fpsimd.o process.o ptrace.o setup.o signal.o \ sys.o stacktrace.o time.o traps.o io.o vdso.o \ hyp-stub.o psci.o cpu_ops.o insn.o return_address.o \ - cpuinfo.o cpu_errata.o alternative.o + cpuinfo.o cpu_errata.o alternative.o \ + smccc-call.o arm64-obj-$(CONFIG_COMPAT) += sys32.o kuser32.o signal32.o \ sys_compat.o diff --git a/arch/arm64/kernel/arm64ksyms.c b/arch/arm64/kernel/arm64ksyms.c index a85843ddbde8..b3c072bde850 100644 --- a/arch/arm64/kernel/arm64ksyms.c +++ b/arch/arm64/kernel/arm64ksyms.c @@ -26,6 +26,7 @@ #include <linux/syscalls.h> #include <linux/uaccess.h> #include <linux/io.h> +#include <linux/arm-smccc.h> #include <asm/checksum.h> @@ -65,3 +66,7 @@ EXPORT_SYMBOL(test_and_change_bit); #ifdef CONFIG_FUNCTION_TRACER EXPORT_SYMBOL(_mcount); #endif + + /* arm-smccc */ +EXPORT_SYMBOL(arm_smccc_smc); +EXPORT_SYMBOL(arm_smccc_hvc); diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 9a9fce090d58..a48fc21b60dc 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -29,6 +29,7 @@ #include <asm/suspend.h> #include <asm/vdso_datapage.h> #include <linux/kbuild.h> +#include <linux/arm-smccc.h> int main(void) { @@ -161,5 +162,7 @@ int main(void) DEFINE(SLEEP_SAVE_SP_PHYS, offsetof(struct sleep_save_sp, save_ptr_stash_phys)); DEFINE(SLEEP_SAVE_SP_VIRT, offsetof(struct sleep_save_sp, save_ptr_stash)); #endif + DEFINE(ARM_SMCCC_RES_X0_OFFS, offsetof(struct arm_smccc_res, a0)); + DEFINE(ARM_SMCCC_RES_X2_OFFS, offsetof(struct arm_smccc_res, a2)); return 0; } diff --git a/arch/arm64/kernel/smccc-call.S b/arch/arm64/kernel/smccc-call.S new file mode 100644 index 000000000000..ae0496fa4235 --- /dev/null +++ b/arch/arm64/kernel/smccc-call.S @@ -0,0 +1,43 @@ +/* + * 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 <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] + 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) + */ +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) + */ +ENTRY(arm_smccc_hvc) + SMCCC hvc +ENDPROC(arm_smccc_hvc) |