/*
 * Copyright (c) 2019 Carlo Caione <ccaione@baylibre.com>
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#ifndef ZEPHYR_INCLUDE_ARCH_ARM64_CPU_H_
#define ZEPHYR_INCLUDE_ARCH_ARM64_CPU_H_

#include <sys/util.h>

#define DAIFSET_FIQ_BIT		BIT(0)
#define DAIFSET_IRQ_BIT		BIT(1)
#define DAIFSET_ABT_BIT		BIT(2)
#define DAIFSET_DBG_BIT		BIT(3)

#define DAIFCLR_FIQ_BIT		BIT(0)
#define DAIFCLR_IRQ_BIT		BIT(1)
#define DAIFCLR_ABT_BIT		BIT(2)
#define DAIFCLR_DBG_BIT		BIT(3)

#define DAIF_FIQ_BIT		BIT(6)
#define DAIF_IRQ_BIT		BIT(7)
#define DAIF_ABT_BIT		BIT(8)
#define DAIF_DBG_BIT		BIT(9)

#define SPSR_DAIF_SHIFT		(6)
#define SPSR_DAIF_MASK		(0xf << SPSR_DAIF_SHIFT)

#define SPSR_MODE_EL0T		(0x0)
#define SPSR_MODE_EL1T		(0x4)
#define SPSR_MODE_EL1H		(0x5)
#define SPSR_MODE_EL2T		(0x8)
#define SPSR_MODE_EL2H		(0x9)
#define SPSR_MODE_MASK		(0xf)


#define SCTLR_EL3_RES1		(BIT(29) | BIT(28) | BIT(23) | \
				 BIT(22) | BIT(18) | BIT(16) | \
				 BIT(11) | BIT(5)  | BIT(4))

#define SCTLR_EL2_RES1		(BIT(29) | BIT(28) | BIT(23) | \
				 BIT(22) | BIT(18) | BIT(16) | \
				 BIT(11) | BIT(5)  | BIT(4))

#define SCTLR_EL1_RES1		(BIT(29) | BIT(28) | BIT(23) | \
				 BIT(22) | BIT(20) | BIT(11))

#define SCTLR_M_BIT		BIT(0)
#define SCTLR_A_BIT		BIT(1)
#define SCTLR_C_BIT		BIT(2)
#define SCTLR_SA_BIT		BIT(3)
#define SCTLR_I_BIT		BIT(12)

#define CPACR_EL1_FPEN_NOTRAP	(0x3 << 20)

#define SCR_NS_BIT		BIT(0)
#define SCR_IRQ_BIT		BIT(1)
#define SCR_FIQ_BIT		BIT(2)
#define SCR_EA_BIT		BIT(3)
#define SCR_SMD_BIT		BIT(7)
#define SCR_HCE_BIT		BIT(8)
#define SCR_RW_BIT		BIT(10)
#define SCR_ST_BIT		BIT(11)

#define SCR_RES1		(BIT(4) | BIT(5))

/* MPIDR */
#define MPIDR_AFFLVL_MASK	(0xff)

#define MPIDR_AFF0_SHIFT	(0)
#define MPIDR_AFF1_SHIFT	(8)
#define MPIDR_AFF2_SHIFT	(16)
#define MPIDR_AFF3_SHIFT	(32)

#define MPIDR_AFFLVL(mpidr, aff_level) \
		(((mpidr) >> MPIDR_AFF##aff_level##_SHIFT) & MPIDR_AFFLVL_MASK)

#define GET_MPIDR()		read_sysreg(mpidr_el1)
#define MPIDR_TO_CORE(mpidr)	MPIDR_AFFLVL(mpidr, 0)
#define IS_PRIMARY_CORE()	(!MPIDR_TO_CORE(GET_MPIDR()))

#define MODE_EL_SHIFT		(0x2)
#define MODE_EL_MASK		(0x3)

#define MODE_EL3		(0x3)
#define MODE_EL2		(0x2)
#define MODE_EL1		(0x1)
#define MODE_EL0		(0x0)

#define GET_EL(_mode)		(((_mode) >> MODE_EL_SHIFT) & MODE_EL_MASK)

#define ESR_EC_SHIFT		(26)
#define ESR_EC_MASK		BIT_MASK(6)
#define ESR_ISS_SHIFT		(0)
#define ESR_ISS_MASK		BIT_MASK(25)
#define ESR_IL_SHIFT		(25)
#define ESR_IL_MASK		BIT_MASK(1)

#define GET_ESR_EC(esr)		(((esr) >> ESR_EC_SHIFT) & ESR_EC_MASK)
#define GET_ESR_IL(esr)		(((esr) >> ESR_IL_SHIFT) & ESR_IL_MASK)
#define GET_ESR_ISS(esr)	(((esr) >> ESR_ISS_SHIFT) & ESR_ISS_MASK)

#define CNTV_CTL_ENABLE_BIT	BIT(0)
#define CNTV_CTL_IMASK_BIT	BIT(1)

#define ID_AA64PFR0_EL0_SHIFT	(0)
#define ID_AA64PFR0_EL1_SHIFT	(4)
#define ID_AA64PFR0_EL2_SHIFT	(8)
#define ID_AA64PFR0_EL3_SHIFT	(12)
#define ID_AA64PFR0_ELX_MASK	(0xf)
#define ID_AA64PFR0_SEL2_SHIFT	(36)
#define ID_AA64PFR0_SEL2_MASK	(0xf)

/*
 * TODO: ACTLR is of class implementation defined. All core implementations
 * in armv8a have the same implementation so far w.r.t few controls.
 * When there will be differences we have to create core specific headers.
 */
#define ACTLR_EL3_CPUACTLR_BIT	BIT(0)
#define ACTLR_EL3_CPUECTLR_BIT	BIT(1)
#define ACTLR_EL3_L2CTLR_BIT	BIT(4)
#define ACTLR_EL3_L2ECTLR_BIT	BIT(5)
#define ACTLR_EL3_L2ACTLR_BIT	BIT(6)

#define CPTR_EZ_BIT		BIT(8)
#define CPTR_TFP_BIT		BIT(10)
#define CPTR_TTA_BIT		BIT(20)
#define CPTR_TCPAC_BIT		BIT(31)

#define CPTR_EL2_RES1		BIT(13) | BIT(12) | BIT(9) | (0xff)

#define HCR_FMO_BIT		BIT(3)
#define HCR_IMO_BIT		BIT(4)
#define HCR_AMO_BIT		BIT(5)
#define HCR_RW_BIT		BIT(31)

/* System register interface to GICv3 */
#define ICC_IGRPEN1_EL1		S3_0_C12_C12_7
#define ICC_SGI1R		S3_0_C12_C11_5
#define ICC_SRE_EL1		S3_0_C12_C12_5
#define ICC_SRE_EL2		S3_4_C12_C9_5
#define ICC_SRE_EL3		S3_6_C12_C12_5
#define ICC_CTLR_EL1		S3_0_C12_C12_4
#define ICC_CTLR_EL3		S3_6_C12_C12_4
#define ICC_PMR_EL1		S3_0_C4_C6_0
#define ICC_RPR_EL1		S3_0_C12_C11_3
#define ICC_IGRPEN1_EL3		S3_6_C12_C12_7
#define ICC_IGRPEN0_EL1		S3_0_C12_C12_6
#define ICC_HPPIR0_EL1		S3_0_C12_C8_2
#define ICC_HPPIR1_EL1		S3_0_C12_C12_2
#define ICC_IAR0_EL1		S3_0_C12_C8_0
#define ICC_IAR1_EL1		S3_0_C12_C12_0
#define ICC_EOIR0_EL1		S3_0_C12_C8_1
#define ICC_EOIR1_EL1		S3_0_C12_C12_1
#define ICC_SGI0R_EL1		S3_0_C12_C11_7

/* register constants */
#define ICC_SRE_ELx_SRE_BIT	BIT(0)
#define ICC_SRE_ELx_DFB_BIT	BIT(1)
#define ICC_SRE_ELx_DIB_BIT	BIT(2)
#define ICC_SRE_EL3_EN_BIT	BIT(3)

/* ICC SGI macros */
#define SGIR_TGT_MASK		(0xffff)
#define SGIR_AFF1_SHIFT		(16)
#define SGIR_AFF2_SHIFT		(32)
#define SGIR_AFF3_SHIFT		(48)
#define SGIR_AFF_MASK		(0xf)
#define SGIR_INTID_SHIFT	(24)
#define SGIR_INTID_MASK		(0xf)
#define SGIR_IRM_SHIFT		(40)
#define SGIR_IRM_MASK		(0x1)
#define SGIR_IRM_TO_AFF		(0)

#define GICV3_SGIR_VALUE(_aff3, _aff2, _aff1, _intid, _irm, _tgt)	\
	((((uint64_t) (_aff3) & SGIR_AFF_MASK) << SGIR_AFF3_SHIFT) |	\
	 (((uint64_t) (_irm) & SGIR_IRM_MASK) << SGIR_IRM_SHIFT) |	\
	 (((uint64_t) (_aff2) & SGIR_AFF_MASK) << SGIR_AFF2_SHIFT) |	\
	 (((_intid) & SGIR_INTID_MASK) << SGIR_INTID_SHIFT) |		\
	 (((_aff1) & SGIR_AFF_MASK) << SGIR_AFF1_SHIFT) |		\
	 ((_tgt) & SGIR_TGT_MASK))

/* Implementation defined register definitions */
#if defined(CONFIG_CPU_CORTEX_A72)

#define CORTEX_A72_L2CTLR_EL1				S3_1_C11_C0_2
#define CORTEX_A72_L2CTLR_DATA_RAM_LATENCY_SHIFT	(0)
#define CORTEX_A72_L2CTLR_DATA_RAM_SETUP_SHIFT		(5)
#define CORTEX_A72_L2CTLR_TAG_RAM_LATENCY_SHIFT		(6)
#define CORTEX_A72_L2CTLR_TAG_RAM_SETUP_SHIFT		(9)

#define CORTEX_A72_L2_DATA_RAM_LATENCY_3_CYCLES		(2)
#define CORTEX_A72_L2_DATA_RAM_LATENCY_MASK		(0x7)
#define CORTEX_A72_L2_DATA_RAM_SETUP_1_CYCLE		(1)
#define CORTEX_A72_L2_TAG_RAM_LATENCY_2_CYCLES		(1)
#define CORTEX_A72_L2_TAG_RAM_LATENCY_3_CYCLES		(2)
#define CORTEX_A72_L2_TAG_RAM_LATENCY_MASK		(0x7)
#define CORTEX_A72_L2_TAG_RAM_SETUP_1_CYCLE		(1)

#define CORTEX_A72_L2ACTLR_EL1				S3_1_C15_C0_0
#define CORTEX_A72_L2ACTLR_DISABLE_ACE_SH_OR_CHI_BIT	BIT(6)

#endif /* CONFIG_CPU_CORTEX_A72 */

#define L1_CACHE_SHIFT		(6)
#define L1_CACHE_BYTES		BIT(L1_CACHE_SHIFT)
#define ARM64_CPU_INIT_SIZE	L1_CACHE_BYTES

#endif /* ZEPHYR_INCLUDE_ARCH_ARM64_CPU_H_ */