mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
096d471a76
add support for x0-x17 registers used by the SMC calls In SMCCC v1.2 [1] arguments are passed in registers x1-x17. Results are returned in x0-x17. This work is inspired from the following kernel commit: arm64: smccc: Add support for SMCCCv1.2 extended input/output registers [1]: https://documentation-service.arm.com/static/5f8edaeff86e16515cdbe4c6?token= Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com> Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org> Cc: Tom Rini <trini@konsulko.com>
190 lines
6 KiB
C
190 lines
6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2015, Linaro Limited
|
|
* Copyright 2022-2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
|
|
*
|
|
* Authors:
|
|
* Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
|
|
*/
|
|
#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;
|
|
};
|
|
|
|
#ifdef CONFIG_ARM64
|
|
/**
|
|
* struct arm_smccc_1_2_regs - Arguments for or Results from SMC call
|
|
* @a0-a17 argument values from registers 0 to 17
|
|
*/
|
|
struct arm_smccc_1_2_regs {
|
|
unsigned long a0;
|
|
unsigned long a1;
|
|
unsigned long a2;
|
|
unsigned long a3;
|
|
unsigned long a4;
|
|
unsigned long a5;
|
|
unsigned long a6;
|
|
unsigned long a7;
|
|
unsigned long a8;
|
|
unsigned long a9;
|
|
unsigned long a10;
|
|
unsigned long a11;
|
|
unsigned long a12;
|
|
unsigned long a13;
|
|
unsigned long a14;
|
|
unsigned long a15;
|
|
unsigned long a16;
|
|
unsigned long a17;
|
|
};
|
|
|
|
/**
|
|
* arm_smccc_1_2_smc() - make SMC calls
|
|
* @args: arguments passed via struct arm_smccc_1_2_regs
|
|
* @res: result values via struct arm_smccc_1_2_regs
|
|
*
|
|
* This function is used to make SMC calls following SMC Calling Convention
|
|
* v1.2 or above. The content of the supplied param are copied from the
|
|
* structure to registers prior to the SMC instruction. The return values
|
|
* are updated with the content from registers on return from the SMC
|
|
* instruction.
|
|
*/
|
|
asmlinkage void arm_smccc_1_2_smc(const struct arm_smccc_1_2_regs *args,
|
|
struct arm_smccc_1_2_regs *res);
|
|
#endif
|
|
|
|
/**
|
|
* 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*/
|