diff options
Diffstat (limited to 'include/linux/arm-smccc.h')
| -rw-r--r-- | include/linux/arm-smccc.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h index 59494df0f55b..56d6a5c6e353 100644 --- a/include/linux/arm-smccc.h +++ b/include/linux/arm-smccc.h @@ -5,12 +5,15 @@ #ifndef __LINUX_ARM_SMCCC_H #define __LINUX_ARM_SMCCC_H +#include <linux/init.h> #include <uapi/linux/const.h> /* * This file provides common defines for ARM SMC Calling Convention as * specified in - * http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html + * https://developer.arm.com/docs/den0028/latest + * + * This code is up-to-date with version DEN 0028 C */ #define ARM_SMCCC_STD_CALL _AC(0,U) @@ -56,6 +59,7 @@ #define ARM_SMCCC_VERSION_1_0 0x10000 #define ARM_SMCCC_VERSION_1_1 0x10001 +#define ARM_SMCCC_VERSION_1_2 0x10002 #define ARM_SMCCC_VERSION_FUNC_ID \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ @@ -98,6 +102,19 @@ enum arm_smccc_conduit { enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void); /** + * arm_smccc_get_version() + * + * Returns the version to be used for SMCCCv1.1 or later. + * + * When SMCCCv1.1 or above is not present, returns SMCCCv1.0, but this + * does not imply the presence of firmware or a valid conduit. Caller + * handling SMCCCv1.0 must determine the conduit by other means. + */ +u32 arm_smccc_get_version(void); + +void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit); + +/** * struct arm_smccc_res - Result from SMC/HVC call * @a0-a3 result values from registers 0 to 3 */ @@ -314,10 +331,14 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, */ #define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__) -/* Return codes defined in ARM DEN 0070A */ +/* + * Return codes defined in ARM DEN 0070A + * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C + */ #define SMCCC_RET_SUCCESS 0 #define SMCCC_RET_NOT_SUPPORTED -1 #define SMCCC_RET_NOT_REQUIRED -2 +#define SMCCC_RET_INVALID_PARAMETER -3 /* * Like arm_smccc_1_1* but always returns SMCCC_RET_NOT_SUPPORTED. |