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/*
* Copyright (c) 2019, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <asm_macros.S>
#include <cpu_macros.S>
#include <platform_def.h>
#include <el3_common_macros.S>
.globl plat_secondary_cold_boot_setup
.globl platform_is_primary_cpu
.globl plat_is_my_cpu_primary
.globl plat_my_core_pos
.globl plat_crash_console_init
.globl plat_crash_console_putc
.globl plat_crash_console_flush
.globl platform_mem_init
.globl plat_secondary_cpus_bl31_entry
.globl plat_get_my_entrypoint
/* -----------------------------------------------------
* void plat_secondary_cold_boot_setup (void);
*
* This function performs any platform specific actions
* needed for a secondary cpu after a cold reset e.g
* mark the cpu's presence, mechanism to place it in a
* holding pen etc.
* -----------------------------------------------------
*/
func plat_secondary_cold_boot_setup
/* Wait until the it gets reset signal from rstmgr gets populated */
poll_mailbox:
wfi
mov_imm x0, PLAT_SEC_ENTRY
ldr x1, [x0]
mov_imm x2, PLAT_CPUID_RELEASE
ldr x3, [x2]
mrs x4, mpidr_el1
and x4, x4, #0xff
cmp x3, x4
b.ne poll_mailbox
br x1
endfunc plat_secondary_cold_boot_setup
func platform_is_primary_cpu
and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK)
cmp x0, #PLAT_PRIMARY_CPU
cset x0, eq
ret
endfunc platform_is_primary_cpu
func plat_is_my_cpu_primary
mrs x0, mpidr_el1
b platform_is_primary_cpu
endfunc plat_is_my_cpu_primary
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
func warm_reset_req
str xzr, [x4]
bl plat_is_my_cpu_primary
cbz x0, cpu_in_wfi
mov_imm x1, PLAT_SEC_ENTRY
str xzr, [x1]
mrs x1, rmr_el3
orr x1, x1, #0x02
msr rmr_el3, x1
isb
dsb sy
cpu_in_wfi:
wfi
b cpu_in_wfi
endfunc warm_reset_req
func plat_get_my_entrypoint
ldr x4, =L2_RESET_DONE_REG
ldr x5, [x4]
ldr x1, =L2_RESET_DONE_STATUS
cmp x1, x5
b.eq warm_reset_req
mov_imm x1, PLAT_SEC_ENTRY
ldr x0, [x1]
ret
endfunc plat_get_my_entrypoint
/* ---------------------------------------------
* int plat_crash_console_init(void)
* Function to initialize the crash console
* without a C Runtime to print crash report.
* Clobber list : x0, x1, x2
* ---------------------------------------------
*/
func plat_crash_console_init
mov_imm x0, CRASH_CONSOLE_BASE
mov_imm x1, PLAT_UART_CLOCK
mov_imm x2, PLAT_BAUDRATE
b console_16550_core_init
endfunc plat_crash_console_init
/* ---------------------------------------------
* int plat_crash_console_putc(void)
* Function to print a character on the crash
* console without a C Runtime.
* Clobber list : x1, x2
* ---------------------------------------------
*/
func plat_crash_console_putc
mov_imm x1, CRASH_CONSOLE_BASE
b console_16550_core_putc
endfunc plat_crash_console_putc
func plat_crash_console_flush
mov_imm x0, CRASH_CONSOLE_BASE
b console_16550_core_flush
endfunc plat_crash_console_flush
/* --------------------------------------------------------
* void platform_mem_init (void);
*
* Any memory init, relocation to be done before the
* platform boots. Called very early in the boot process.
* --------------------------------------------------------
*/
func platform_mem_init
mov x0, #0
ret
endfunc platform_mem_init
func plat_secondary_cpus_bl31_entry
el3_entrypoint_common \
_init_sctlr=0 \
_warm_boot_mailbox=!PROGRAMMABLE_RESET_ADDRESS \
_secondary_cold_boot=!COLD_BOOT_SINGLE_CPU \
_init_memory=1 \
_init_c_runtime=1 \
_exception_vectors=runtime_exceptions \
_pie_fixup_size=BL31_LIMIT - BL31_BASE
endfunc plat_secondary_cpus_bl31_entry
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