[J-u-boot.git] / include / linux / arm-smccc.h

/*
 * Copyright (c) 2015, Linaro Limited
 *
 * SPDX-License-Identifier:	GPL-2.0
 */
#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		0
#define ARM_SMCCC_FAST_CALL		1
#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 */

#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;
};

/**
 * __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*/
Commit	Line	Data
c2da86f3 MY	1	/*
	2	* Copyright (c) 2015, Linaro Limited
	3	*
c54bcf68	4	* SPDX-License-Identifier: GPL-2.0
c2da86f3 MY	5	*/
	6	#ifndef __LINUX_ARM_SMCCC_H
	7	#define __LINUX_ARM_SMCCC_H
	8
	9	/*
	10	* This file provides common defines for ARM SMC Calling Convention as
	11	* specified in
	12	* http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
	13	*/
	14
	15	#define ARM_SMCCC_STD_CALL 0
	16	#define ARM_SMCCC_FAST_CALL 1
	17	#define ARM_SMCCC_TYPE_SHIFT 31
	18
	19	#define ARM_SMCCC_SMC_32 0
	20	#define ARM_SMCCC_SMC_64 1
	21	#define ARM_SMCCC_CALL_CONV_SHIFT 30
	22
	23	#define ARM_SMCCC_OWNER_MASK 0x3F
	24	#define ARM_SMCCC_OWNER_SHIFT 24
	25
	26	#define ARM_SMCCC_FUNC_MASK 0xFFFF
	27
	28	#define ARM_SMCCC_IS_FAST_CALL(smc_val) \
	29	((smc_val) & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT))
	30	#define ARM_SMCCC_IS_64(smc_val) \
	31	((smc_val) & (ARM_SMCCC_SMC_64 << ARM_SMCCC_CALL_CONV_SHIFT))
	32	#define ARM_SMCCC_FUNC_NUM(smc_val) ((smc_val) & ARM_SMCCC_FUNC_MASK)
	33	#define ARM_SMCCC_OWNER_NUM(smc_val) \
	34	(((smc_val) >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK)
	35
	36	#define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
	37	(((type) << ARM_SMCCC_TYPE_SHIFT) \| \
	38	((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) \| \
	39	(((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) \| \
	40	((func_num) & ARM_SMCCC_FUNC_MASK))
	41
	42	#define ARM_SMCCC_OWNER_ARCH 0
	43	#define ARM_SMCCC_OWNER_CPU 1
	44	#define ARM_SMCCC_OWNER_SIP 2
	45	#define ARM_SMCCC_OWNER_OEM 3
	46	#define ARM_SMCCC_OWNER_STANDARD 4
	47	#define ARM_SMCCC_OWNER_TRUSTED_APP 48
	48	#define ARM_SMCCC_OWNER_TRUSTED_APP_END 49
	49	#define ARM_SMCCC_OWNER_TRUSTED_OS 50
	50	#define ARM_SMCCC_OWNER_TRUSTED_OS_END 63
	51
	52	#define ARM_SMCCC_QUIRK_NONE 0
	53	#define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */
	54
	55	#ifndef __ASSEMBLY__
	56
	57	#include <linux/linkage.h>
	58	#include <linux/types.h>
	59	/**
	60	* struct arm_smccc_res - Result from SMC/HVC call
	61	* @a0-a3 result values from registers 0 to 3
	62	*/
	63	struct arm_smccc_res {
	64	unsigned long a0;
	65	unsigned long a1;
	66	unsigned long a2;
	67	unsigned long a3;
	68	};
69
70	/**
71	* struct arm_smccc_quirk - Contains quirk information
72	* @id: quirk identification
73	* @state: quirk specific information
74	* @a6: Qualcomm quirk entry for returning post-smc call contents of a6
75	*/
76	struct arm_smccc_quirk {
77	int id;
78	union {
79	unsigned long a6;
80	} state;
81	};
82
83	/**
84	* __arm_smccc_smc() - make SMC calls
85	* @a0-a7: arguments passed in registers 0 to 7
86	* @res: result values from registers 0 to 3
87	* @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required.
88	*
89	* This function is used to make SMC calls following SMC Calling Convention.
90	* The content of the supplied param are copied to registers 0 to 7 prior
91	* to the SMC instruction. The return values are updated with the content
92	* from register 0 to 3 on return from the SMC instruction. An optional
93	* quirk structure provides vendor specific behavior.
94	*/
95	asmlinkage void __arm_smccc_smc(unsigned long a0, unsigned long a1,
96	unsigned long a2, unsigned long a3, unsigned long a4,
97	unsigned long a5, unsigned long a6, unsigned long a7,
98	struct arm_smccc_res res, struct arm_smccc_quirk quirk);
99
100	/**
101	* __arm_smccc_hvc() - make HVC calls
102	* @a0-a7: arguments passed in registers 0 to 7
103	* @res: result values from registers 0 to 3
104	* @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required.
105	*
106	* This function is used to make HVC calls following SMC Calling
107	* Convention. The content of the supplied param are copied to registers 0
108	* to 7 prior to the HVC instruction. The return values are updated with
109	* the content from register 0 to 3 on return from the HVC instruction. An
110	* optional quirk structure provides vendor specific behavior.
111	*/
112	asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
113	unsigned long a2, unsigned long a3, unsigned long a4,
114	unsigned long a5, unsigned long a6, unsigned long a7,
115	struct arm_smccc_res res, struct arm_smccc_quirk quirk);
116
117	#define arm_smccc_smc(...) __arm_smccc_smc(__VA_ARGS__, NULL)
118
119	#define arm_smccc_smc_quirk(...) __arm_smccc_smc(__VA_ARGS__)
120
121	#define arm_smccc_hvc(...) __arm_smccc_hvc(__VA_ARGS__, NULL)
122
123	#define arm_smccc_hvc_quirk(...) __arm_smccc_hvc(__VA_ARGS__)
124
125	#endif /__ASSEMBLY__/
126	#endif /__LINUX_ARM_SMCCC_H/