| Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
| 7 | #include <asm_macros.S> |
| Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 8 | #include <drivers/console.h> |
| Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 9 | #include <platform_def.h> |
| 10 | |
| 11 | .weak plat_my_core_pos |
| 12 | .globl plat_crash_console_init |
| 13 | .globl plat_crash_console_putc |
| 14 | .globl plat_crash_console_flush |
| 15 | .weak platform_mem_init |
| 16 | .globl plat_ls_calc_core_pos |
| 17 | |
| 18 | |
| 19 | /* ----------------------------------------------------- |
| 20 | * unsigned int plat_my_core_pos(void) |
| 21 | * This function uses the plat_ls_calc_core_pos() |
| 22 | * definition to get the index of the calling CPU. |
| 23 | * ----------------------------------------------------- |
| 24 | */ |
| 25 | func plat_my_core_pos |
| 26 | mrs x0, mpidr_el1 |
| 27 | b plat_ls_calc_core_pos |
| 28 | endfunc plat_my_core_pos |
| 29 | |
| 30 | /* ----------------------------------------------------- |
| 31 | * unsigned int plat_ls_calc_core_pos(u_register_t mpidr) |
| 32 | * Helper function to calculate the core position. |
| 33 | * With this function: CorePos = (ClusterId * 4) + |
| 34 | * CoreId |
| 35 | * ----------------------------------------------------- |
| 36 | */ |
| 37 | func plat_ls_calc_core_pos |
| 38 | and x1, x0, #MPIDR_CPU_MASK |
| 39 | and x0, x0, #MPIDR_CLUSTER_MASK |
| 40 | add x0, x1, x0, LSR #6 |
| 41 | ret |
| 42 | endfunc plat_ls_calc_core_pos |
| 43 | |
| 44 | /* --------------------------------------------- |
| 45 | * int plat_crash_console_init(void) |
| 46 | * Function to initialize the crash console |
| 47 | * without a C Runtime to print crash report. |
| 48 | * Clobber list : x0 - x4 |
| 49 | * --------------------------------------------- |
| 50 | */ |
| 51 | |
| Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 52 | /* ----------------------------------------------------- |
| 53 | * int plat_crash_console_init(void) |
| 54 | * Use normal console by default. Switch it to crash |
| 55 | * mode so serial consoles become active again. |
| 56 | * NOTE: This default implementation will only work for |
| 57 | * crashes that occur after a normal console (marked |
| 58 | * valid for the crash state) has been registered with |
| 59 | * the console framework. To debug crashes that occur |
| 60 | * earlier, the platform has to override these functions |
| 61 | * with an implementation that initializes a console |
| 62 | * driver with hardcoded parameters. See |
| 63 | * docs/porting-guide.rst for more information. |
| 64 | * ----------------------------------------------------- |
| 65 | */ |
| 66 | func plat_crash_console_init |
| 67 | #if defined(IMAGE_BL1) |
| 68 | /* |
| 69 | * BL1 code can possibly crash so early that the data segment is not yet |
| 70 | * accessible. Don't risk undefined behavior by trying to run the normal |
| 71 | * console framework. Platforms that want to debug BL1 will need to |
| 72 | * override this with custom functions that can run from registers only. |
| 73 | */ |
| 74 | mov x0, #0 |
| 75 | ret |
| 76 | #else /* IMAGE_BL1 */ |
| 77 | mov x3, x30 |
| 78 | mov x0, #CONSOLE_FLAG_CRASH |
| 79 | bl console_switch_state |
| 80 | mov x0, #1 |
| 81 | ret x3 |
| 82 | #endif |
| 83 | endfunc plat_crash_console_init |
| 84 | |
| 85 | /* ----------------------------------------------------- |
| 86 | * void plat_crash_console_putc(int character) |
| 87 | * Output through the normal console by default. |
| 88 | * ----------------------------------------------------- |
| 89 | */ |
| 90 | func plat_crash_console_putc |
| 91 | b console_putc |
| 92 | endfunc plat_crash_console_putc |
| 93 | |
| 94 | /* ----------------------------------------------------- |
| 95 | * void plat_crash_console_flush(void) |
| 96 | * Flush normal console by default. |
| 97 | * ----------------------------------------------------- |
| 98 | */ |
| 99 | func plat_crash_console_flush |
| 100 | b console_flush |
| 101 | endfunc plat_crash_console_flush |
| 102 | |
| Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 103 | /* --------------------------------------------------------------------- |
| 104 | * We don't need to carry out any memory initialization on LS |
| 105 | * platforms. The Secure SRAM is accessible straight away. |
| 106 | * --------------------------------------------------------------------- |
| 107 | */ |
| 108 | func platform_mem_init |
| 109 | ret |
| 110 | endfunc platform_mem_init |