1/* 2 * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7#include <arch.h> 8#include <asm_macros.S> 9#include <cpu_macros.S> 10#include <platform_def.h> 11 12 .globl plat_secondary_cold_boot_setup 13 .globl platform_is_primary_cpu 14 .globl plat_is_my_cpu_primary 15 .globl plat_my_core_pos 16 .globl plat_crash_console_init 17 .globl plat_crash_console_putc 18 .globl plat_crash_console_flush 19 .globl platform_mem_init 20 21 .globl plat_get_my_entrypoint 22 23 /* ----------------------------------------------------- 24 * void plat_secondary_cold_boot_setup (void); 25 * 26 * This function performs any platform specific actions 27 * needed for a secondary cpu after a cold reset e.g 28 * mark the cpu's presence, mechanism to place it in a 29 * holding pen etc. 30 * ----------------------------------------------------- 31 */ 32func plat_secondary_cold_boot_setup 33 /* Wait until the it gets reset signal from rstmgr gets populated */ 34poll_mailbox: 35 wfi 36 37 mov_imm x0, PLAT_SEC_ENTRY 38 ldr x1, [x0] 39 mov_imm x2, PLAT_CPUID_RELEASE 40 ldr x3, [x2] 41 mrs x4, mpidr_el1 42 and x4, x4, #0xff 43 cmp x3, x4 44 b.ne poll_mailbox 45 br x1 46endfunc plat_secondary_cold_boot_setup 47 48func platform_is_primary_cpu 49 and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK) 50 cmp x0, #PLAT_PRIMARY_CPU 51 cset x0, eq 52 ret 53endfunc platform_is_primary_cpu 54 55func plat_is_my_cpu_primary 56 mrs x0, mpidr_el1 57 b platform_is_primary_cpu 58endfunc plat_is_my_cpu_primary 59 60func plat_my_core_pos 61 mrs x0, mpidr_el1 62 and x1, x0, #MPIDR_CPU_MASK 63 and x0, x0, #MPIDR_CLUSTER_MASK 64 add x0, x1, x0, LSR #6 65 ret 66endfunc plat_my_core_pos 67 68func plat_get_my_entrypoint 69 mov_imm x1, PLAT_SEC_ENTRY 70 ldr x0, [x1] 71 ret 72endfunc plat_get_my_entrypoint 73 74 /* --------------------------------------------- 75 * int plat_crash_console_init(void) 76 * Function to initialize the crash console 77 * without a C Runtime to print crash report. 78 * Clobber list : x0, x1, x2 79 * --------------------------------------------- 80 */ 81func plat_crash_console_init 82 mov_imm x0, PLAT_UART0_BASE 83 mov_imm x1, PLAT_UART_CLOCK 84 mov_imm x2, PLAT_BAUDRATE 85 b console_16550_core_init 86endfunc plat_crash_console_init 87 88 /* --------------------------------------------- 89 * int plat_crash_console_putc(void) 90 * Function to print a character on the crash 91 * console without a C Runtime. 92 * Clobber list : x1, x2 93 * --------------------------------------------- 94 */ 95func plat_crash_console_putc 96 mov_imm x1, PLAT_UART0_BASE 97 b console_16550_core_putc 98endfunc plat_crash_console_putc 99 100func plat_crash_console_flush 101 mov_imm x0, CRASH_CONSOLE_BASE 102 b console_16550_core_flush 103endfunc plat_crash_console_flush 104 105 106 /* -------------------------------------------------------- 107 * void platform_mem_init (void); 108 * 109 * Any memory init, relocation to be done before the 110 * platform boots. Called very early in the boot process. 111 * -------------------------------------------------------- 112 */ 113func platform_mem_init 114 mov x0, #0 115 ret 116endfunc platform_mem_init 117