diff options
| author | Elliot Berman <eberman@codeaurora.org> | 2020-01-08 00:04:18 +0300 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-01-08 09:14:22 +0300 |
| commit | 0224898152bdca2dee603d3f0b592026ff871d63 (patch) | |
| tree | a87ff4b853d54f50bebce90c370f31d6e660bf74 /drivers/firmware | |
| parent | 5dad8deee29b7a64854e8bceb90337fa4db610de (diff) | |
| download | linux-0224898152bdca2dee603d3f0b592026ff871d63.tar.xz | |
firmware: qcom_scm-32: Use SMC arch wrappers
Use SMC arch wrappers instead of inline assembly.
Tested-by: Brian Masney <masneyb@onstation.org> # arm32
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Elliot Berman <eberman@codeaurora.org>
Link: https://lore.kernel.org/r/1578431066-19600-10-git-send-email-eberman@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/Makefile | 1 | ||||
| -rw-r--r-- | drivers/firmware/qcom_scm-32.c | 71 |
2 files changed, 17 insertions, 55 deletions
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile index 3fcb91975bdc..747fb73b264c 100644 --- a/drivers/firmware/Makefile +++ b/drivers/firmware/Makefile @@ -20,7 +20,6 @@ obj-$(CONFIG_FW_CFG_SYSFS) += qemu_fw_cfg.o obj-$(CONFIG_QCOM_SCM) += qcom_scm.o obj-$(CONFIG_QCOM_SCM_64) += qcom_scm-64.o obj-$(CONFIG_QCOM_SCM_32) += qcom_scm-32.o -CFLAGS_qcom_scm-32.o :=$(call as-instr,.arch armv7-a\n.arch_extension sec,-DREQUIRES_SEC=1) -march=armv7-a obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o obj-$(CONFIG_TURRIS_MOX_RWTM) += turris-mox-rwtm.o diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c index 8b5724069f27..362d0423e0a7 100644 --- a/drivers/firmware/qcom_scm-32.c +++ b/drivers/firmware/qcom_scm-32.c @@ -10,6 +10,7 @@ #include <linux/errno.h> #include <linux/err.h> #include <linux/qcom_scm.h> +#include <linux/arm-smccc.h> #include <linux/dma-mapping.h> #include "qcom_scm.h" @@ -121,25 +122,13 @@ static inline void *scm_legacy_get_response_buffer( static u32 __scm_legacy_do(u32 cmd_addr) { int context_id; - register u32 r0 asm("r0") = 1; - register u32 r1 asm("r1") = (u32)&context_id; - register u32 r2 asm("r2") = cmd_addr; + struct arm_smccc_res res; do { - asm volatile( - __asmeq("%0", "r0") - __asmeq("%1", "r0") - __asmeq("%2", "r1") - __asmeq("%3", "r2") -#ifdef REQUIRES_SEC - ".arch_extension sec\n" -#endif - "smc #0 @ switch to secure world\n" - : "=r" (r0) - : "r" (r0), "r" (r1), "r" (r2) - : "r3", "r12"); - } while (r0 == QCOM_SCM_INTERRUPTED); - - return r0; + arm_smccc_smc(1, (unsigned long)&context_id, cmd_addr, + 0, 0, 0, 0, 0, &res); + } while (res.a0 == QCOM_SCM_INTERRUPTED); + + return res.a0; } /** @@ -237,24 +226,12 @@ out: static s32 qcom_scm_call_atomic1(u32 svc, u32 cmd, u32 arg1) { int context_id; + struct arm_smccc_res res; + + arm_smccc_smc(SCM_LEGACY_ATOMIC_ID(svc, cmd, 1), + (unsigned long)&context_id, arg1, 0, 0, 0, 0, 0, &res); - register u32 r0 asm("r0") = SCM_LEGACY_ATOMIC_ID(svc, cmd, 1); - register u32 r1 asm("r1") = (u32)&context_id; - register u32 r2 asm("r2") = arg1; - - asm volatile( - __asmeq("%0", "r0") - __asmeq("%1", "r0") - __asmeq("%2", "r1") - __asmeq("%3", "r2") -#ifdef REQUIRES_SEC - ".arch_extension sec\n" -#endif - "smc #0 @ switch to secure world\n" - : "=r" (r0) - : "r" (r0), "r" (r1), "r" (r2) - : "r3", "r12"); - return r0; + return res.a0; } /** @@ -270,26 +247,12 @@ static s32 qcom_scm_call_atomic1(u32 svc, u32 cmd, u32 arg1) static s32 qcom_scm_call_atomic2(u32 svc, u32 cmd, u32 arg1, u32 arg2) { int context_id; + struct arm_smccc_res res; + + arm_smccc_smc(SCM_LEGACY_ATOMIC_ID(svc, cmd, 2), + (unsigned long)&context_id, arg1, 0, 0, 0, 0, 0, &res); - register u32 r0 asm("r0") = SCM_LEGACY_ATOMIC_ID(svc, cmd, 2); - register u32 r1 asm("r1") = (u32)&context_id; - register u32 r2 asm("r2") = arg1; - register u32 r3 asm("r3") = arg2; - - asm volatile( - __asmeq("%0", "r0") - __asmeq("%1", "r0") - __asmeq("%2", "r1") - __asmeq("%3", "r2") - __asmeq("%4", "r3") -#ifdef REQUIRES_SEC - ".arch_extension sec\n" -#endif - "smc #0 @ switch to secure world\n" - : "=r" (r0) - : "r" (r0), "r" (r1), "r" (r2), "r" (r3) - : "r12"); - return r0; + return res.a0; } /** |