| 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> |
| 8 | #include <console.h> |
| 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 | |
| 52 | #if MULTI_CONSOLE_API |
| 53 | /* ----------------------------------------------------- |
| 54 | * int plat_crash_console_init(void) |
| 55 | * Use normal console by default. Switch it to crash |
| 56 | * mode so serial consoles become active again. |
| 57 | * NOTE: This default implementation will only work for |
| 58 | * crashes that occur after a normal console (marked |
| 59 | * valid for the crash state) has been registered with |
| 60 | * the console framework. To debug crashes that occur |
| 61 | * earlier, the platform has to override these functions |
| 62 | * with an implementation that initializes a console |
| 63 | * driver with hardcoded parameters. See |
| 64 | * docs/porting-guide.rst for more information. |
| 65 | * ----------------------------------------------------- |
| 66 | */ |
| 67 | func plat_crash_console_init |
| 68 | #if defined(IMAGE_BL1) |
| 69 | /* |
| 70 | * BL1 code can possibly crash so early that the data segment is not yet |
| 71 | * accessible. Don't risk undefined behavior by trying to run the normal |
| 72 | * console framework. Platforms that want to debug BL1 will need to |
| 73 | * override this with custom functions that can run from registers only. |
| 74 | */ |
| 75 | mov x0, #0 |
| 76 | ret |
| 77 | #else /* IMAGE_BL1 */ |
| 78 | mov x3, x30 |
| 79 | mov x0, #CONSOLE_FLAG_CRASH |
| 80 | bl console_switch_state |
| 81 | mov x0, #1 |
| 82 | ret x3 |
| 83 | #endif |
| 84 | endfunc plat_crash_console_init |
| 85 | |
| 86 | /* ----------------------------------------------------- |
| 87 | * void plat_crash_console_putc(int character) |
| 88 | * Output through the normal console by default. |
| 89 | * ----------------------------------------------------- |
| 90 | */ |
| 91 | func plat_crash_console_putc |
| 92 | b console_putc |
| 93 | endfunc plat_crash_console_putc |
| 94 | |
| 95 | /* ----------------------------------------------------- |
| 96 | * void plat_crash_console_flush(void) |
| 97 | * Flush normal console by default. |
| 98 | * ----------------------------------------------------- |
| 99 | */ |
| 100 | func plat_crash_console_flush |
| 101 | b console_flush |
| 102 | endfunc plat_crash_console_flush |
| 103 | |
| 104 | #else /* MULTI_CONSOLE_API */ |
| 105 | |
| 106 | /* ----------------------------------------------------- |
| 107 | * In the old API these are all no-op stubs that need to |
| 108 | * be overridden by the platform to be useful. |
| 109 | * ----------------------------------------------------- |
| 110 | */ |
| 111 | func plat_crash_console_init |
| 112 | mov_imm x0, PLAT_LS1043_UART_BASE |
| 113 | mov_imm x1, PLAT_LS1043_UART_CLOCK |
| 114 | mov_imm x2, PLAT_LS1043_UART_BAUDRATE |
| 115 | b console_core_init |
| 116 | endfunc plat_crash_console_init |
| 117 | |
| 118 | /* --------------------------------------------- |
| 119 | * int plat_crash_console_putc(int c) |
| 120 | * Function to print a character on the crash |
| 121 | * console without a C Runtime. |
| 122 | * Clobber list : x1, x2 |
| 123 | * --------------------------------------------- |
| 124 | */ |
| 125 | func plat_crash_console_putc |
| 126 | mov_imm x1, PLAT_LS1043_UART_BASE |
| 127 | b console_core_putc |
| 128 | endfunc plat_crash_console_putc |
| 129 | |
| 130 | /* --------------------------------------------- |
| 131 | * int plat_crash_console_flush() |
| 132 | * Function to force a write of all buffered |
| 133 | * data that hasn't been output. |
| 134 | * Out : return -1 on error else return 0. |
| 135 | * Clobber list : r0 - r1 |
| 136 | * --------------------------------------------- |
| 137 | */ |
| 138 | func plat_crash_console_flush |
| 139 | mov_imm x1, PLAT_LS1043_UART_BASE |
| 140 | b console_core_flush |
| 141 | endfunc plat_crash_console_flush |
| 142 | #endif |
| 143 | /* --------------------------------------------------------------------- |
| 144 | * We don't need to carry out any memory initialization on LS |
| 145 | * platforms. The Secure SRAM is accessible straight away. |
| 146 | * --------------------------------------------------------------------- |
| 147 | */ |
| 148 | func platform_mem_init |
| 149 | ret |
| 150 | endfunc platform_mem_init |