644 lines
21 KiB
C
644 lines
21 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2015, Linaro Limited
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*/
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#ifndef __LINUX_ARM_SMCCC_H
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#define __LINUX_ARM_SMCCC_H
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#include <linux/args.h>
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#include <linux/init.h>
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#include <uapi/linux/const.h>
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/*
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* This file provides common defines for ARM SMC Calling Convention as
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* specified in
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* https://developer.arm.com/docs/den0028/latest
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*
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* This code is up-to-date with version DEN 0028 C
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*/
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#define ARM_SMCCC_STD_CALL _AC(0,U)
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#define ARM_SMCCC_FAST_CALL _AC(1,U)
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#define ARM_SMCCC_TYPE_SHIFT 31
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#define ARM_SMCCC_SMC_32 0
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#define ARM_SMCCC_SMC_64 1
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#define ARM_SMCCC_CALL_CONV_SHIFT 30
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#define ARM_SMCCC_OWNER_MASK 0x3F
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#define ARM_SMCCC_OWNER_SHIFT 24
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#define ARM_SMCCC_FUNC_MASK 0xFFFF
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#define ARM_SMCCC_IS_FAST_CALL(smc_val) \
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((smc_val) & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT))
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#define ARM_SMCCC_IS_64(smc_val) \
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((smc_val) & (ARM_SMCCC_SMC_64 << ARM_SMCCC_CALL_CONV_SHIFT))
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#define ARM_SMCCC_FUNC_NUM(smc_val) ((smc_val) & ARM_SMCCC_FUNC_MASK)
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#define ARM_SMCCC_OWNER_NUM(smc_val) \
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(((smc_val) >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK)
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#define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \
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(((type) << ARM_SMCCC_TYPE_SHIFT) | \
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((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) | \
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(((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \
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((func_num) & ARM_SMCCC_FUNC_MASK))
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#define ARM_SMCCC_OWNER_ARCH 0
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#define ARM_SMCCC_OWNER_CPU 1
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#define ARM_SMCCC_OWNER_SIP 2
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#define ARM_SMCCC_OWNER_OEM 3
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#define ARM_SMCCC_OWNER_STANDARD 4
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#define ARM_SMCCC_OWNER_STANDARD_HYP 5
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#define ARM_SMCCC_OWNER_VENDOR_HYP 6
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#define ARM_SMCCC_OWNER_TRUSTED_APP 48
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#define ARM_SMCCC_OWNER_TRUSTED_APP_END 49
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#define ARM_SMCCC_OWNER_TRUSTED_OS 50
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#define ARM_SMCCC_OWNER_TRUSTED_OS_END 63
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#define ARM_SMCCC_FUNC_QUERY_CALL_UID 0xff01
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#define ARM_SMCCC_QUIRK_NONE 0
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#define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */
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#define ARM_SMCCC_VERSION_1_0 0x10000
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#define ARM_SMCCC_VERSION_1_1 0x10001
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#define ARM_SMCCC_VERSION_1_2 0x10002
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#define ARM_SMCCC_VERSION_1_3 0x10003
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#define ARM_SMCCC_1_3_SVE_HINT 0x10000
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#define ARM_SMCCC_CALL_HINTS ARM_SMCCC_1_3_SVE_HINT
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#define ARM_SMCCC_VERSION_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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0, 0)
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#define ARM_SMCCC_ARCH_FEATURES_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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0, 1)
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#define ARM_SMCCC_ARCH_SOC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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0, 2)
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#define ARM_SMCCC_ARCH_WORKAROUND_1 \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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0, 0x8000)
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#define ARM_SMCCC_ARCH_WORKAROUND_2 \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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0, 0x7fff)
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#define ARM_SMCCC_ARCH_WORKAROUND_3 \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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0, 0x3fff)
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#define ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_VENDOR_HYP, \
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ARM_SMCCC_FUNC_QUERY_CALL_UID)
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/* KVM UID value: 28b46fb6-2ec5-11e9-a9ca-4b564d003a74 */
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#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_0 0xb66fb428U
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#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_1 0xe911c52eU
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#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_2 0x564bcaa9U
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#define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_3 0x743a004dU
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/* KVM "vendor specific" services */
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#define ARM_SMCCC_KVM_FUNC_FEATURES 0
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#define ARM_SMCCC_KVM_FUNC_PTP 1
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/* Start of pKVM hypercall range */
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#define ARM_SMCCC_KVM_FUNC_HYP_MEMINFO 2
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#define ARM_SMCCC_KVM_FUNC_MEM_SHARE 3
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#define ARM_SMCCC_KVM_FUNC_MEM_UNSHARE 4
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_5 5
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_6 6
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#define ARM_SMCCC_KVM_FUNC_MMIO_GUARD 7
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_8 8
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_9 9
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_10 10
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_11 11
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_12 12
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_13 13
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_14 14
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_15 15
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_16 16
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_17 17
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_18 18
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_19 19
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_20 20
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_21 21
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_22 22
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_23 23
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_24 24
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_25 25
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_26 26
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_27 27
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_28 28
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_29 29
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_30 30
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_31 31
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_32 32
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_33 33
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_34 34
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_35 35
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_36 36
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_37 37
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_38 38
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_39 39
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_40 40
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_41 41
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_42 42
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_43 43
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_44 44
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_45 45
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_46 46
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_47 47
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_48 48
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_49 49
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_50 50
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_51 51
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_52 52
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_53 53
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_54 54
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_55 55
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_56 56
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_57 57
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_58 58
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_59 59
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_60 60
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_61 61
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_62 62
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#define ARM_SMCCC_KVM_FUNC_PKVM_RESV_63 63
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/* End of pKVM hypercall range */
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#define ARM_SMCCC_KVM_FUNC_FEATURES_2 127
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#define ARM_SMCCC_KVM_NUM_FUNCS 128
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#define ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_VENDOR_HYP, \
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ARM_SMCCC_KVM_FUNC_FEATURES)
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#define SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED 1
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/*
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* ptp_kvm is a feature used for time sync between vm and host.
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* ptp_kvm module in guest kernel will get service from host using
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* this hypercall ID.
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*/
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#define ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_VENDOR_HYP, \
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ARM_SMCCC_KVM_FUNC_PTP)
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#define ARM_SMCCC_VENDOR_HYP_KVM_HYP_MEMINFO_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_VENDOR_HYP, \
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ARM_SMCCC_KVM_FUNC_HYP_MEMINFO)
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#define ARM_SMCCC_VENDOR_HYP_KVM_MEM_SHARE_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_VENDOR_HYP, \
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ARM_SMCCC_KVM_FUNC_MEM_SHARE)
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#define ARM_SMCCC_VENDOR_HYP_KVM_MEM_UNSHARE_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_VENDOR_HYP, \
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ARM_SMCCC_KVM_FUNC_MEM_UNSHARE)
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#define ARM_SMCCC_VENDOR_HYP_KVM_MMIO_GUARD_FUNC_ID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_VENDOR_HYP, \
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ARM_SMCCC_KVM_FUNC_MMIO_GUARD)
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/* ptp_kvm counter type ID */
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#define KVM_PTP_VIRT_COUNTER 0
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#define KVM_PTP_PHYS_COUNTER 1
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/* Paravirtualised time calls (defined by ARM DEN0057A) */
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#define ARM_SMCCC_HV_PV_TIME_FEATURES \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_STANDARD_HYP, \
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0x20)
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#define ARM_SMCCC_HV_PV_TIME_ST \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_STANDARD_HYP, \
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0x21)
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/* TRNG entropy source calls (defined by ARM DEN0098) */
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#define ARM_SMCCC_TRNG_VERSION \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_STANDARD, \
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0x50)
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#define ARM_SMCCC_TRNG_FEATURES \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_STANDARD, \
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0x51)
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#define ARM_SMCCC_TRNG_GET_UUID \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_STANDARD, \
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0x52)
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#define ARM_SMCCC_TRNG_RND32 \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_32, \
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ARM_SMCCC_OWNER_STANDARD, \
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0x53)
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#define ARM_SMCCC_TRNG_RND64 \
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ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
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ARM_SMCCC_SMC_64, \
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ARM_SMCCC_OWNER_STANDARD, \
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0x53)
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/*
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* Return codes defined in ARM DEN 0070A
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* ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C
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*/
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#define SMCCC_RET_SUCCESS 0
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#define SMCCC_RET_NOT_SUPPORTED -1
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#define SMCCC_RET_NOT_REQUIRED -2
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#define SMCCC_RET_INVALID_PARAMETER -3
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#ifndef __ASSEMBLY__
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#include <linux/linkage.h>
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#include <linux/types.h>
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enum arm_smccc_conduit {
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SMCCC_CONDUIT_NONE,
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SMCCC_CONDUIT_SMC,
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SMCCC_CONDUIT_HVC,
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};
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/**
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* arm_smccc_1_1_get_conduit()
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*
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* Returns the conduit to be used for SMCCCv1.1 or later.
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*
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* When SMCCCv1.1 is not present, returns SMCCC_CONDUIT_NONE.
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*/
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enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void);
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/**
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* arm_smccc_get_version()
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*
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* Returns the version to be used for SMCCCv1.1 or later.
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*
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* When SMCCCv1.1 or above is not present, returns SMCCCv1.0, but this
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* does not imply the presence of firmware or a valid conduit. Caller
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* handling SMCCCv1.0 must determine the conduit by other means.
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*/
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u32 arm_smccc_get_version(void);
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void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit);
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/**
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* arm_smccc_get_soc_id_version()
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*
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* Returns the SOC ID version.
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*
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* When ARM_SMCCC_ARCH_SOC_ID is not present, returns SMCCC_RET_NOT_SUPPORTED.
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*/
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s32 arm_smccc_get_soc_id_version(void);
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/**
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* arm_smccc_get_soc_id_revision()
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*
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* Returns the SOC ID revision.
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*
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* When ARM_SMCCC_ARCH_SOC_ID is not present, returns SMCCC_RET_NOT_SUPPORTED.
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*/
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s32 arm_smccc_get_soc_id_revision(void);
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/**
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* struct arm_smccc_res - Result from SMC/HVC call
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* @a0-a3 result values from registers 0 to 3
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*/
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struct arm_smccc_res {
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unsigned long a0;
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unsigned long a1;
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unsigned long a2;
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unsigned long a3;
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};
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#ifdef CONFIG_ARM64
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/**
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* struct arm_smccc_1_2_regs - Arguments for or Results from SMC/HVC call
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* @a0-a17 argument values from registers 0 to 17
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*/
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struct arm_smccc_1_2_regs {
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unsigned long a0;
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unsigned long a1;
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unsigned long a2;
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unsigned long a3;
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unsigned long a4;
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unsigned long a5;
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unsigned long a6;
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unsigned long a7;
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unsigned long a8;
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unsigned long a9;
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unsigned long a10;
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unsigned long a11;
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unsigned long a12;
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unsigned long a13;
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unsigned long a14;
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unsigned long a15;
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unsigned long a16;
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unsigned long a17;
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};
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/**
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* arm_smccc_1_2_hvc() - make HVC calls
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* @args: arguments passed via struct arm_smccc_1_2_regs
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* @res: result values via struct arm_smccc_1_2_regs
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*
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* This function is used to make HVC calls following SMC Calling Convention
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* v1.2 or above. The content of the supplied param are copied from the
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* structure to registers prior to the HVC instruction. The return values
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* are updated with the content from registers on return from the HVC
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* instruction.
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*/
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asmlinkage void arm_smccc_1_2_hvc(const struct arm_smccc_1_2_regs *args,
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struct arm_smccc_1_2_regs *res);
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/**
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* arm_smccc_1_2_smc() - make SMC calls
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* @args: arguments passed via struct arm_smccc_1_2_regs
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* @res: result values via struct arm_smccc_1_2_regs
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*
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* This function is used to make SMC calls following SMC Calling Convention
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* v1.2 or above. The content of the supplied param are copied from the
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* structure to registers prior to the SMC instruction. The return values
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* are updated with the content from registers on return from the SMC
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* instruction.
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*/
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asmlinkage void arm_smccc_1_2_smc(const struct arm_smccc_1_2_regs *args,
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struct arm_smccc_1_2_regs *res);
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#endif
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/**
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* struct arm_smccc_quirk - Contains quirk information
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* @id: quirk identification
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* @state: quirk specific information
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* @a6: Qualcomm quirk entry for returning post-smc call contents of a6
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*/
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struct arm_smccc_quirk {
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int id;
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union {
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unsigned long a6;
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} state;
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};
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/**
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* __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.
|
|
*/
|
|
#ifdef CONFIG_HAVE_ARM_SMCCC
|
|
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);
|
|
#else
|
|
static inline 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)
|
|
{
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|
*res = (struct arm_smccc_res){};
|
|
}
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|
#endif
|
|
|
|
/**
|
|
* __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__)
|
|
|
|
/* SMCCC v1.1 implementation madness follows */
|
|
#ifdef CONFIG_ARM64
|
|
|
|
#define SMCCC_SMC_INST "smc #0"
|
|
#define SMCCC_HVC_INST "hvc #0"
|
|
|
|
#elif defined(CONFIG_ARM)
|
|
#include <asm/opcodes-sec.h>
|
|
#include <asm/opcodes-virt.h>
|
|
|
|
#define SMCCC_SMC_INST __SMC(0)
|
|
#define SMCCC_HVC_INST __HVC(0)
|
|
|
|
#endif
|
|
|
|
#define __constraint_read_2 "r" (arg0)
|
|
#define __constraint_read_3 __constraint_read_2, "r" (arg1)
|
|
#define __constraint_read_4 __constraint_read_3, "r" (arg2)
|
|
#define __constraint_read_5 __constraint_read_4, "r" (arg3)
|
|
#define __constraint_read_6 __constraint_read_5, "r" (arg4)
|
|
#define __constraint_read_7 __constraint_read_6, "r" (arg5)
|
|
#define __constraint_read_8 __constraint_read_7, "r" (arg6)
|
|
#define __constraint_read_9 __constraint_read_8, "r" (arg7)
|
|
|
|
#define __declare_arg_2(a0, res) \
|
|
struct arm_smccc_res *___res = res; \
|
|
register unsigned long arg0 asm("r0") = (u32)a0
|
|
|
|
#define __declare_arg_3(a0, a1, res) \
|
|
typeof(a1) __a1 = a1; \
|
|
struct arm_smccc_res *___res = res; \
|
|
register unsigned long arg0 asm("r0") = (u32)a0; \
|
|
register typeof(a1) arg1 asm("r1") = __a1
|
|
|
|
#define __declare_arg_4(a0, a1, a2, res) \
|
|
typeof(a1) __a1 = a1; \
|
|
typeof(a2) __a2 = a2; \
|
|
struct arm_smccc_res *___res = res; \
|
|
register unsigned long arg0 asm("r0") = (u32)a0; \
|
|
register typeof(a1) arg1 asm("r1") = __a1; \
|
|
register typeof(a2) arg2 asm("r2") = __a2
|
|
|
|
#define __declare_arg_5(a0, a1, a2, a3, res) \
|
|
typeof(a1) __a1 = a1; \
|
|
typeof(a2) __a2 = a2; \
|
|
typeof(a3) __a3 = a3; \
|
|
struct arm_smccc_res *___res = res; \
|
|
register unsigned long arg0 asm("r0") = (u32)a0; \
|
|
register typeof(a1) arg1 asm("r1") = __a1; \
|
|
register typeof(a2) arg2 asm("r2") = __a2; \
|
|
register typeof(a3) arg3 asm("r3") = __a3
|
|
|
|
#define __declare_arg_6(a0, a1, a2, a3, a4, res) \
|
|
typeof(a4) __a4 = a4; \
|
|
__declare_arg_5(a0, a1, a2, a3, res); \
|
|
register typeof(a4) arg4 asm("r4") = __a4
|
|
|
|
#define __declare_arg_7(a0, a1, a2, a3, a4, a5, res) \
|
|
typeof(a5) __a5 = a5; \
|
|
__declare_arg_6(a0, a1, a2, a3, a4, res); \
|
|
register typeof(a5) arg5 asm("r5") = __a5
|
|
|
|
#define __declare_arg_8(a0, a1, a2, a3, a4, a5, a6, res) \
|
|
typeof(a6) __a6 = a6; \
|
|
__declare_arg_7(a0, a1, a2, a3, a4, a5, res); \
|
|
register typeof(a6) arg6 asm("r6") = __a6
|
|
|
|
#define __declare_arg_9(a0, a1, a2, a3, a4, a5, a6, a7, res) \
|
|
typeof(a7) __a7 = a7; \
|
|
__declare_arg_8(a0, a1, a2, a3, a4, a5, a6, res); \
|
|
register typeof(a7) arg7 asm("r7") = __a7
|
|
|
|
/*
|
|
* We have an output list that is not necessarily used, and GCC feels
|
|
* entitled to optimise the whole sequence away. "volatile" is what
|
|
* makes it stick.
|
|
*/
|
|
#define __arm_smccc_1_1(inst, ...) \
|
|
do { \
|
|
register unsigned long r0 asm("r0"); \
|
|
register unsigned long r1 asm("r1"); \
|
|
register unsigned long r2 asm("r2"); \
|
|
register unsigned long r3 asm("r3"); \
|
|
CONCATENATE(__declare_arg_, \
|
|
COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); \
|
|
asm volatile(inst "\n" : \
|
|
"=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3) \
|
|
: CONCATENATE(__constraint_read_, \
|
|
COUNT_ARGS(__VA_ARGS__)) \
|
|
: "memory"); \
|
|
if (___res) \
|
|
*___res = (typeof(*___res)){r0, r1, r2, r3}; \
|
|
} while (0)
|
|
|
|
/*
|
|
* arm_smccc_1_1_smc() - make an SMCCC v1.1 compliant SMC call
|
|
*
|
|
* This is a variadic macro taking one to eight source arguments, and
|
|
* an optional return structure.
|
|
*
|
|
* @a0-a7: arguments passed in registers 0 to 7
|
|
* @res: result values from registers 0 to 3
|
|
*
|
|
* This macro is used to make SMC calls following SMC Calling Convention v1.1.
|
|
* 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 if not NULL.
|
|
*/
|
|
#define arm_smccc_1_1_smc(...) __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__)
|
|
|
|
/*
|
|
* arm_smccc_1_1_hvc() - make an SMCCC v1.1 compliant HVC call
|
|
*
|
|
* This is a variadic macro taking one to eight source arguments, and
|
|
* an optional return structure.
|
|
*
|
|
* @a0-a7: arguments passed in registers 0 to 7
|
|
* @res: result values from registers 0 to 3
|
|
*
|
|
* This macro is used to make HVC calls following SMC Calling Convention v1.1.
|
|
* 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 if not NULL.
|
|
*/
|
|
#define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__)
|
|
|
|
/*
|
|
* Like arm_smccc_1_1* but always returns SMCCC_RET_NOT_SUPPORTED.
|
|
* Used when the SMCCC conduit is not defined. The empty asm statement
|
|
* avoids compiler warnings about unused variables.
|
|
*/
|
|
#define __fail_smccc_1_1(...) \
|
|
do { \
|
|
CONCATENATE(__declare_arg_, \
|
|
COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); \
|
|
asm ("" : \
|
|
: CONCATENATE(__constraint_read_, \
|
|
COUNT_ARGS(__VA_ARGS__)) \
|
|
: "memory"); \
|
|
if (___res) \
|
|
___res->a0 = SMCCC_RET_NOT_SUPPORTED; \
|
|
} while (0)
|
|
|
|
/*
|
|
* arm_smccc_1_1_invoke() - make an SMCCC v1.1 compliant call
|
|
*
|
|
* This is a variadic macro taking one to eight source arguments, and
|
|
* an optional return structure.
|
|
*
|
|
* @a0-a7: arguments passed in registers 0 to 7
|
|
* @res: result values from registers 0 to 3
|
|
*
|
|
* This macro will make either an HVC call or an SMC call depending on the
|
|
* current SMCCC conduit. If no valid conduit is available then -1
|
|
* (SMCCC_RET_NOT_SUPPORTED) is returned in @res.a0 (if supplied).
|
|
*
|
|
* The return value also provides the conduit that was used.
|
|
*/
|
|
#define arm_smccc_1_1_invoke(...) ({ \
|
|
int method = arm_smccc_1_1_get_conduit(); \
|
|
switch (method) { \
|
|
case SMCCC_CONDUIT_HVC: \
|
|
arm_smccc_1_1_hvc(__VA_ARGS__); \
|
|
break; \
|
|
case SMCCC_CONDUIT_SMC: \
|
|
arm_smccc_1_1_smc(__VA_ARGS__); \
|
|
break; \
|
|
default: \
|
|
__fail_smccc_1_1(__VA_ARGS__); \
|
|
method = SMCCC_CONDUIT_NONE; \
|
|
break; \
|
|
} \
|
|
method; \
|
|
})
|
|
|
|
#endif /*__ASSEMBLY__*/
|
|
#endif /*__LINUX_ARM_SMCCC_H*/
|