| /* |
| * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <arch.h> |
| #include <asm_macros.S> |
| #include <assert_macros.S> |
| #include <platform_def.h> |
| #include <cortex_a72.h> |
| |
| #include "../include/rpi_hw.h" |
| |
| .globl plat_crash_console_flush |
| .globl plat_crash_console_init |
| .globl plat_crash_console_putc |
| .globl platform_mem_init |
| .globl plat_get_my_entrypoint |
| .globl plat_is_my_cpu_primary |
| .globl plat_my_core_pos |
| .globl plat_reset_handler |
| .globl plat_rpi3_calc_core_pos |
| .globl plat_secondary_cold_boot_setup |
| |
| /* ----------------------------------------------------- |
| * unsigned int plat_my_core_pos(void) |
| * |
| * This function uses the plat_rpi3_calc_core_pos() |
| * definition to get the index of the calling CPU. |
| * ----------------------------------------------------- |
| */ |
| func plat_my_core_pos |
| mrs x0, mpidr_el1 |
| b plat_rpi3_calc_core_pos |
| endfunc plat_my_core_pos |
| |
| /* ----------------------------------------------------- |
| * unsigned int plat_rpi3_calc_core_pos(u_register_t mpidr); |
| * |
| * CorePos = (ClusterId * 4) + CoreId |
| * ----------------------------------------------------- |
| */ |
| func plat_rpi3_calc_core_pos |
| and x1, x0, #MPIDR_CPU_MASK |
| and x0, x0, #MPIDR_CLUSTER_MASK |
| add x0, x1, x0, LSR #6 |
| ret |
| endfunc plat_rpi3_calc_core_pos |
| |
| /* ----------------------------------------------------- |
| * unsigned int plat_is_my_cpu_primary (void); |
| * |
| * Find out whether the current cpu is the primary |
| * cpu. |
| * ----------------------------------------------------- |
| */ |
| func plat_is_my_cpu_primary |
| mrs x0, mpidr_el1 |
| and x0, x0, #(MPIDR_CLUSTER_MASK | MPIDR_CPU_MASK) |
| cmp x0, #RPI4_PRIMARY_CPU |
| cset w0, eq |
| ret |
| endfunc plat_is_my_cpu_primary |
| |
| /* ----------------------------------------------------- |
| * 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 |
| /* Calculate address of our hold entry */ |
| bl plat_my_core_pos |
| lsl x0, x0, #3 |
| mov_imm x2, PLAT_RPI3_TM_HOLD_BASE |
| add x0, x0, x2 |
| |
| /* |
| * This code runs way before requesting the warmboot of this core, |
| * so it is possible to clear the mailbox before getting a request |
| * to boot. |
| */ |
| mov x1, PLAT_RPI3_TM_HOLD_STATE_WAIT |
| str x1,[x0] |
| |
| /* Wait until we have a go */ |
| poll_mailbox: |
| wfe |
| ldr x1, [x0] |
| cmp x1, PLAT_RPI3_TM_HOLD_STATE_GO |
| bne poll_mailbox |
| |
| /* Jump to the provided entrypoint */ |
| mov_imm x0, PLAT_RPI3_TM_ENTRYPOINT |
| ldr x1, [x0] |
| br x1 |
| endfunc plat_secondary_cold_boot_setup |
| |
| /* --------------------------------------------------------------------- |
| * uintptr_t plat_get_my_entrypoint (void); |
| * |
| * Main job of this routine is to distinguish between a cold and a warm |
| * boot. |
| * |
| * This functions returns: |
| * - 0 for a cold boot. |
| * - Any other value for a warm boot. |
| * --------------------------------------------------------------------- |
| */ |
| func plat_get_my_entrypoint |
| /* TODO: support warm boot */ |
| mov x0, #0 |
| ret |
| endfunc plat_get_my_entrypoint |
| |
| /* --------------------------------------------- |
| * void platform_mem_init (void); |
| * |
| * No need to carry out any memory initialization. |
| * --------------------------------------------- |
| */ |
| func platform_mem_init |
| ret |
| endfunc platform_mem_init |
| |
| /* --------------------------------------------- |
| * int plat_crash_console_init(void) |
| * Function to initialize the crash console |
| * without a C Runtime to print crash report. |
| * Clobber list : x0 - x3 |
| * --------------------------------------------- |
| */ |
| func plat_crash_console_init |
| mov_imm x0, PLAT_RPI3_UART_BASE |
| mov_imm x1, PLAT_RPI4_VPU_CLK_RATE |
| mov_imm x2, PLAT_RPI3_UART_BAUDRATE |
| b console_16550_core_init |
| endfunc plat_crash_console_init |
| |
| /* --------------------------------------------- |
| * int plat_crash_console_putc(int c) |
| * 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, PLAT_RPI3_UART_BASE |
| b console_16550_core_putc |
| endfunc plat_crash_console_putc |
| |
| /* --------------------------------------------- |
| * int plat_crash_console_flush() |
| * Function to force a write of all buffered |
| * data that hasn't been output. |
| * Out : return -1 on error else return 0. |
| * Clobber list : x0, x1 |
| * --------------------------------------------- |
| */ |
| func plat_crash_console_flush |
| mov_imm x0, PLAT_RPI3_UART_BASE |
| b console_16550_core_flush |
| endfunc plat_crash_console_flush |
| |
| /* --------------------------------------------- |
| * void plat_reset_handler(void); |
| * --------------------------------------------- |
| */ |
| func plat_reset_handler |
| /* ------------------------------------------------ |
| * Set L2 read/write cache latency: |
| * - L2 Data RAM latency: 3 cycles (0b010) |
| * - L2 Data RAM setup: 1 cycle (bit 5) |
| * ------------------------------------------------ |
| */ |
| mrs x0, CORTEX_A72_L2CTLR_EL1 |
| mov x1, #0x22 |
| orr x0, x0, x1 |
| msr CORTEX_A72_L2CTLR_EL1, x0 |
| isb |
| |
| ret |
| endfunc plat_reset_handler |
