| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Debugging macro include header |
| * |
| * Copyright (C) 1994-1999 Russell King |
| * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks |
| */ |
| |
| #define UART_DATA 0 |
| #define UART_FLAG 0x18 |
| #define UART_FLAG_BUSY (1 << 3) |
| |
| .macro addruart, rp, rv, tmp |
| ldr \rp, =CONFIG_DEBUG_UART_PHYS |
| ldr \rv, =CONFIG_DEBUG_UART_VIRT |
| .endm |
| |
| .macro senduart,rd,rx |
| str \rd, [\rx, #UART_DATA] |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1002: ldr \rd, [\rx, #UART_FLAG] |
| tst \rd, #UART_FLAG_BUSY |
| bne 1002b |
| .endm |
| |
| .macro waituart,rd,rx |
| 1001: ldr \rd, [\rx, #UART_FLAG] |
| tst \rd, #UART_FLAG_BUSY |
| bne 1001b |
| .endm |
