| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * arch/arm/include/debug/sti.S |
| * |
| * Debugging macro include header |
| * Copyright (C) 2013 STMicroelectronics (R&D) Limited. |
| */ |
| |
| #define ASC_TX_BUF_OFF 0x04 |
| #define ASC_CTRL_OFF 0x0c |
| #define ASC_STA_OFF 0x14 |
| |
| #define ASC_STA_TX_FULL (1<<9) |
| #define ASC_STA_TX_EMPTY (1<<1) |
| |
| |
| .macro addruart, rp, rv, tmp |
| ldr \rp, =CONFIG_DEBUG_UART_PHYS @ physical base |
| ldr \rv, =CONFIG_DEBUG_UART_VIRT @ virt base |
| .endm |
| |
| .macro senduart,rd,rx |
| strb \rd, [\rx, #ASC_TX_BUF_OFF] |
| .endm |
| |
| .macro waituartcts,rd,rx |
| .endm |
| |
| .macro waituarttxrdy,rd,rx |
| 1001: ldr \rd, [\rx, #ASC_STA_OFF] |
| tst \rd, #ASC_STA_TX_FULL |
| bne 1001b |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1001: ldr \rd, [\rx, #ASC_STA_OFF] |
| tst \rd, #ASC_STA_TX_EMPTY |
| beq 1001b |
| .endm |
