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cortex_a73.S 3.5 KB
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Add support for ARM Cortex-A73 MPCore Processor    
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/*
 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
 *
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Use SPDX license identifiers    
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 * SPDX-License-Identifier: BSD-3-Clause
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Add support for ARM Cortex-A73 MPCore Processor    
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 */
#include <arch.h>
#include <asm_macros.S>
#include <bl_common.h>
#include <cortex_a73.h>
#include <cpu_macros.S>
#include <plat_macros.S>

	/* ---------------------------------------------
	 * Disable L1 data cache
	 * ---------------------------------------------
	 */
func cortex_a73_disable_dcache
	mrs	x1, sctlr_el3
	bic	x1, x1, #SCTLR_C_BIT
	msr	sctlr_el3, x1
	isb
	ret
endfunc cortex_a73_disable_dcache

	/* ---------------------------------------------
	 * Disable intra-cluster coherency
	 * ---------------------------------------------
	 */
func cortex_a73_disable_smp
	mrs	x0, CORTEX_A73_CPUECTLR_EL1
	bic	x0, x0, #CORTEX_A73_CPUECTLR_SMP_BIT
	msr	CORTEX_A73_CPUECTLR_EL1, x0
	isb
	dsb	sy
	ret
endfunc cortex_a73_disable_smp

func cortex_a73_reset_func
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Workaround for CVE-2017-5715 on Cortex A73 and A75    
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#if IMAGE_BL31 && WORKAROUND_CVE_2017_5715
	adr	x0, workaround_bpiall_vbar0_runtime_exceptions
	msr	vbar_el3, x0
#endif
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Add support for ARM Cortex-A73 MPCore Processor    
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	/* ---------------------------------------------
	 * Enable the SMP bit.
	 * Clobbers : x0
	 * ---------------------------------------------
	 */
	mrs	x0, CORTEX_A73_CPUECTLR_EL1
	orr	x0, x0, #CORTEX_A73_CPUECTLR_SMP_BIT
	msr	CORTEX_A73_CPUECTLR_EL1, x0
	isb
	ret
endfunc cortex_a73_reset_func

func cortex_a73_core_pwr_dwn
	mov	x18, x30

	/* ---------------------------------------------
	 * Turn off caches.
	 * ---------------------------------------------
	 */
	bl	cortex_a73_disable_dcache

	/* ---------------------------------------------
	 * Flush L1 caches.
	 * ---------------------------------------------
	 */
	mov	x0, #DCCISW
	bl	dcsw_op_level1

	/* ---------------------------------------------
	 * Come out of intra cluster coherency
	 * ---------------------------------------------
	 */
	mov	x30, x18
	b	cortex_a73_disable_smp
endfunc cortex_a73_core_pwr_dwn

func cortex_a73_cluster_pwr_dwn
	mov	x18, x30

	/* ---------------------------------------------
	 * Turn off caches.
	 * ---------------------------------------------
	 */
	bl	cortex_a73_disable_dcache

	/* ---------------------------------------------
	 * Flush L1 caches.
	 * ---------------------------------------------
	 */
	mov	x0, #DCCISW
	bl	dcsw_op_level1

	/* ---------------------------------------------
	 * Disable the optional ACP.
	 * ---------------------------------------------
	 */
	bl	plat_disable_acp

	/* ---------------------------------------------
	 * Flush L2 caches.
	 * ---------------------------------------------
	 */
	mov	x0, #DCCISW
	bl	dcsw_op_level2

	/* ---------------------------------------------
	 * Come out of intra cluster coherency
	 * ---------------------------------------------
	 */
	mov	x30, x18
	b	cortex_a73_disable_smp
endfunc cortex_a73_cluster_pwr_dwn

	/* ---------------------------------------------
	 * This function provides cortex_a73 specific
	 * register information for crash reporting.
	 * It needs to return with x6 pointing to
	 * a list of register names in ascii and
	 * x8 - x15 having values of registers to be
	 * reported.
	 * ---------------------------------------------
	 */
.section .rodata.cortex_a73_regs, "aS"
cortex_a73_regs:  /* The ascii list of register names to be reported */
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bl31: Add error reporting registers    
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	.asciz	"cpuectlr_el1", "l2merrsr_el1", ""
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func cortex_a73_cpu_reg_dump
	adr	x6, cortex_a73_regs
	mrs	x8, CORTEX_A73_CPUECTLR_EL1
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	mrs	x9, CORTEX_A73_L2MERRSR_EL1
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	ret
endfunc cortex_a73_cpu_reg_dump
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declare_cpu_ops cortex_a73, CORTEX_A73_MIDR, \
	cortex_a73_reset_func, \
	cortex_a73_core_pwr_dwn, \
	cortex_a73_cluster_pwr_dwn