| Yann Gautier | 4b0c72a | 2018-07-16 10:54:09 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | #include <asm_macros.S> |
| 7 | |
| 8 | .globl console_core_init |
| 9 | .globl console_core_putc |
| 10 | .globl console_core_getc |
| 11 | .globl console_core_flush |
| 12 | |
| 13 | /* ----------------------------------------------------------------- |
| 14 | * int console_core_init(uintptr_t base_addr, |
| 15 | * unsigned int uart_clk, |
| 16 | * unsigned int baud_rate) |
| 17 | * |
| 18 | * Function to initialize the console without a C Runtime to print |
| 19 | * debug information. This function will be accessed by console_init |
| 20 | * and crash reporting. |
| 21 | * |
| 22 | * In: r0 - console base address |
| 23 | * r1 - Uart clock in Hz |
| 24 | * r2 - Baud rate |
| 25 | * Out: return 1 on success else 0 on error |
| 26 | * Clobber list : r1, r2, r3 |
| 27 | * ----------------------------------------------------------------- |
| 28 | */ |
| 29 | func console_core_init |
| 30 | bx lr |
| 31 | endfunc console_core_init |
| 32 | |
| 33 | /* --------------------------------------------------------------- |
| 34 | * int console_core_putc(int c, uintptr_t base_addr) |
| 35 | * |
| 36 | * Function to output a character over the console. It returns the |
| 37 | * character printed on success or -1 on error. |
| 38 | * |
| 39 | * In : r0 - character to be printed |
| 40 | * r1 - console base address |
| 41 | * Out : return -1 on error else return character. |
| 42 | * Clobber list : r2 |
| 43 | * --------------------------------------------------------------- |
| 44 | */ |
| 45 | func console_core_putc |
| 46 | bx lr |
| 47 | endfunc console_core_putc |
| 48 | |
| 49 | /* ----------------------------------------------------------- |
| 50 | * int console_core_getc(uintptr_t base_addr) |
| 51 | * |
| 52 | * Function to get a character from the console. |
| 53 | * It returns the character grabbed on success or -1 on error. |
| 54 | * |
| 55 | * In : r0 - console base address |
| 56 | * Out : return -1. |
| 57 | * Clobber list : r0, r1 |
| 58 | * ----------------------------------------------------------- |
| 59 | */ |
| 60 | func console_core_getc |
| 61 | /* Not supported */ |
| 62 | mov r0, #-1 |
| 63 | bx lr |
| 64 | endfunc console_core_getc |
| 65 | |
| 66 | /* --------------------------------------------------------------- |
| 67 | * int console_core_flush(uintptr_t base_addr) |
| 68 | * |
| 69 | * Function to force a write of all buffered data that hasn't been |
| 70 | * output. |
| 71 | * |
| 72 | * In : r0 - console base address |
| 73 | * Out : return -1 on error else return 0. |
| 74 | * Clobber list : r0, r1 |
| 75 | * --------------------------------------------------------------- |
| 76 | */ |
| 77 | func console_core_flush |
| 78 | bx lr |
| 79 | endfunc console_core_flush |