mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-09-22 15:42:04 +00:00
2fbe47b7e7
Use PSCI device to query Arm SMCCC v1.1 support from secure monitor and if so, bind drivers for the SMCCC features that monitor supports. Drivers willing to be bound from Arm SMCCC features discovery can use macro ARM_SMCCC_FEATURE_DRIVER() to register to smccc feature discovery, providing target driver name and a callback function that returns whether or not the SMCCC feature is supported by the system. Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
145 lines
4.8 KiB
C
145 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2015, Linaro Limited
|
|
*/
|
|
#ifndef __LINUX_ARM_SMCCC_H
|
|
#define __LINUX_ARM_SMCCC_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
|
|
*/
|
|
|
|
#define ARM_SMCCC_STD_CALL 0UL
|
|
#define ARM_SMCCC_FAST_CALL 1UL
|
|
#define ARM_SMCCC_TYPE_SHIFT 31
|
|
|
|
#define ARM_SMCCC_SMC_32 0
|
|
#define ARM_SMCCC_SMC_64 1
|
|
#define ARM_SMCCC_CALL_CONV_SHIFT 30
|
|
|
|
#define ARM_SMCCC_OWNER_MASK 0x3F
|
|
#define ARM_SMCCC_OWNER_SHIFT 24
|
|
|
|
#define ARM_SMCCC_FUNC_MASK 0xFFFF
|
|
|
|
#define ARM_SMCCC_IS_FAST_CALL(smc_val) \
|
|
((smc_val) & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT))
|
|
#define ARM_SMCCC_IS_64(smc_val) \
|
|
((smc_val) & (ARM_SMCCC_SMC_64 << ARM_SMCCC_CALL_CONV_SHIFT))
|
|
#define ARM_SMCCC_FUNC_NUM(smc_val) ((smc_val) & ARM_SMCCC_FUNC_MASK)
|
|
#define ARM_SMCCC_OWNER_NUM(smc_val) \
|
|
(((smc_val) >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK)
|
|
|
|
#define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
|
|
(((type) << ARM_SMCCC_TYPE_SHIFT) | \
|
|
((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) | \
|
|
(((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \
|
|
((func_num) & ARM_SMCCC_FUNC_MASK))
|
|
|
|
#define ARM_SMCCC_OWNER_ARCH 0
|
|
#define ARM_SMCCC_OWNER_CPU 1
|
|
#define ARM_SMCCC_OWNER_SIP 2
|
|
#define ARM_SMCCC_OWNER_OEM 3
|
|
#define ARM_SMCCC_OWNER_STANDARD 4
|
|
#define ARM_SMCCC_OWNER_TRUSTED_APP 48
|
|
#define ARM_SMCCC_OWNER_TRUSTED_APP_END 49
|
|
#define ARM_SMCCC_OWNER_TRUSTED_OS 50
|
|
#define ARM_SMCCC_OWNER_TRUSTED_OS_END 63
|
|
|
|
#define ARM_SMCCC_QUIRK_NONE 0
|
|
#define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */
|
|
|
|
#define ARM_SMCCC_ARCH_FEATURES 0x80000001
|
|
|
|
#define ARM_SMCCC_RET_NOT_SUPPORTED ((unsigned long)-1)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/linkage.h>
|
|
#include <linux/types.h>
|
|
/**
|
|
* struct arm_smccc_res - Result from SMC/HVC call
|
|
* @a0-a3 result values from registers 0 to 3
|
|
*/
|
|
struct arm_smccc_res {
|
|
unsigned long a0;
|
|
unsigned long a1;
|
|
unsigned long a2;
|
|
unsigned long a3;
|
|
};
|
|
|
|
/**
|
|
* struct arm_smccc_quirk - Contains quirk information
|
|
* @id: quirk identification
|
|
* @state: quirk specific information
|
|
* @a6: Qualcomm quirk entry for returning post-smc call contents of a6
|
|
*/
|
|
struct arm_smccc_quirk {
|
|
int id;
|
|
union {
|
|
unsigned long a6;
|
|
} state;
|
|
};
|
|
|
|
/**
|
|
* struct arm_smccc_feature - Driver registration data for discoverable feature
|
|
* @driver_name: name of the driver relate to the SMCCC feature
|
|
* @is_supported: callback to test if SMCCC feature is supported
|
|
*/
|
|
struct arm_smccc_feature {
|
|
const char *driver_name;
|
|
bool (*is_supported)(void (*invoke_fn)(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));
|
|
};
|
|
|
|
#define ARM_SMCCC_FEATURE_DRIVER(__name) \
|
|
ll_entry_declare(struct arm_smccc_feature, __name, arm_smccc_feature)
|
|
|
|
/**
|
|
* __arm_smccc_smc() - make SMC calls
|
|
* @a0-a7: arguments passed in registers 0 to 7
|
|
* @res: result values from registers 0 to 3
|
|
* @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required.
|
|
*
|
|
* This function is used to make SMC calls following SMC Calling Convention.
|
|
* The content of the supplied param are copied to registers 0 to 7 prior
|
|
* to the SMC instruction. The return values are updated with the content
|
|
* from register 0 to 3 on return from the SMC instruction. An optional
|
|
* quirk structure provides vendor specific behavior.
|
|
*/
|
|
asmlinkage 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);
|
|
|
|
/**
|
|
* __arm_smccc_hvc() - make HVC calls
|
|
* @a0-a7: arguments passed in registers 0 to 7
|
|
* @res: result values from registers 0 to 3
|
|
* @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required.
|
|
*
|
|
* This function is used to make HVC calls following SMC Calling
|
|
* Convention. The content of the supplied param are copied to registers 0
|
|
* to 7 prior to the HVC instruction. The return values are updated with
|
|
* the content from register 0 to 3 on return from the HVC instruction. An
|
|
* optional quirk structure provides vendor specific behavior.
|
|
*/
|
|
asmlinkage 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);
|
|
|
|
#define arm_smccc_smc(...) __arm_smccc_smc(__VA_ARGS__, NULL)
|
|
|
|
#define arm_smccc_smc_quirk(...) __arm_smccc_smc(__VA_ARGS__)
|
|
|
|
#define arm_smccc_hvc(...) __arm_smccc_hvc(__VA_ARGS__, NULL)
|
|
|
|
#define arm_smccc_hvc_quirk(...) __arm_smccc_hvc(__VA_ARGS__)
|
|
|
|
#endif /*__ASSEMBLY__*/
|
|
#endif /*__LINUX_ARM_SMCCC_H*/
|