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/*
* Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <asm_macros.S>
#include <platform_def.h>
#include <cortex_a72.h>
.globl plat_is_my_cpu_primary
.globl plat_my_core_pos
.globl plat_calc_core_pos
.globl plat_reset_handler
.globl plat_get_my_entrypoint
.globl plat_secondary_cold_boot_setup
.globl plat_crash_console_init
.globl plat_crash_console_putc
.globl platform_mem_init
.globl imx_mailbox_init
/* --------------------------------------------------------------------
* Helper macro that reads the part number of the current CPU and jumps
* to the given label if it matches the CPU MIDR provided.
*
* Clobbers x0.
* --------------------------------------------------------------------
*/
.macro jump_if_cpu_midr _cpu_midr, _label
mrs x0, midr_el1
ubfx x0, x0, MIDR_PN_SHIFT, #12
cmp w0, #((\_cpu_midr >> MIDR_PN_SHIFT) & MIDR_PN_MASK)
b.eq \_label
.endm
/* ----------------------------------------------
* The mailbox_base is used to distinguish warm/cold
* reset. The mailbox_base is in the data section, not
* in .bss, this allows function to start using this
* variable before the runtime memory is initialized.
* ----------------------------------------------
*/
.section .data.mailbox_base ; .align 3
mailbox_base: .quad 0x0
/* ----------------------------------------------
* unsigned int plat_is_my_cpu_primary(void);
* This function checks if this is the primary CPU
* ----------------------------------------------
*/
func plat_is_my_cpu_primary
mrs x0, mpidr_el1
and x0, x0, #(MPIDR_CPU_MASK)
cmp x0, #PLAT_PRIMARY_CPU
cset x0, eq
ret
endfunc plat_is_my_cpu_primary
/* ----------------------------------------------
* unsigned int plat_my_core_pos(void)
* This Function uses the plat_calc_core_pos()
* to get the index of the calling CPU.
* ----------------------------------------------
*/
func plat_my_core_pos
mrs x0, mpidr_el1
and x1, x0, #MPIDR_CPU_MASK
and x0, x0, #MPIDR_CLUSTER_MASK
add x0, x1, x0, LSR #6
ret
endfunc plat_my_core_pos
/*
* unsigned int plat_calc_core_pos(uint64_t mpidr)
* helper function to calculate the core position.
* With this function.
*/
func plat_calc_core_pos
and x1, x0, #MPIDR_CPU_MASK
and x0, x0, #MPIDR_CLUSTER_MASK
add x0, x1, x0, LSR #6
ret
endfunc plat_calc_core_pos
/* ----------------------------------------------
* function to handle platform specific reset.
* ----------------------------------------------
*/
func plat_reset_handler
/* enable EL2 cpuectlr RW access */
mov x0, #0x73
msr actlr_el3, x0
msr actlr_el2, x0
isb
/* --------------------------------------------------------------------
* Nothing to do on Cortex-A53.
* --------------------------------------------------------------------
*/
jump_if_cpu_midr CORTEX_A72_MIDR, A72
ret
A72:
/* --------------------------------------------------------------------
* Cortex-A72 specific settings
* --------------------------------------------------------------------
*/
mov x0, #(CORTEX_A72_L2_DATA_RAM_LATENCY_3_CYCLES << CORTEX_A72_L2CTLR_DATA_RAM_LATENCY_SHIFT)
msr CORTEX_A72_L2CTLR_EL1, x0
isb
ret
endfunc plat_reset_handler
/* ---------------------------------------------
* function to get the entrypoint.
* ---------------------------------------------
*/
func plat_get_my_entrypoint
adrp x1, mailbox_base
ldr x0, [x1, :lo12:mailbox_base]
ret
endfunc plat_get_my_entrypoint
func plat_secondary_cold_boot_setup
b .
endfunc plat_secondary_cold_boot_setup
func plat_crash_console_init
/* TODO */
ret
endfunc plat_crash_console_init
func plat_crash_console_putc
/* TODO */
ret
endfunc plat_crash_console_putc
func platform_mem_init
ret
endfunc platform_mem_init
/* Init the mailbox base address */
func imx_mailbox_init
adrp x1, mailbox_base
str x0, [x1, :lo12:mailbox_base]
ret
endfunc imx_mailbox_init
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