| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Debugging macro include header |
| 3 | * |
| 4 | * Copyright (C) 1994-1999 Russell King |
| 5 | * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #define UART_DATA 0 |
| 14 | #define UART_FLAG 0x18 |
| 15 | #define UART_FLAG_BUSY (1 << 3) |
| 16 | |
| 17 | .macro addruart, rp, rv, tmp |
| 18 | ldr \rp, =CONFIG_DEBUG_UART_PHYS |
| 19 | ldr \rv, =CONFIG_DEBUG_UART_VIRT |
| 20 | .endm |
| 21 | |
| 22 | .macro senduart,rd,rx |
| 23 | str \rd, [\rx, #UART_DATA] |
| 24 | .endm |
| 25 | |
| 26 | .macro busyuart,rd,rx |
| 27 | 1002: ldr \rd, [\rx, #UART_FLAG] |
| 28 | tst \rd, #UART_FLAG_BUSY |
| 29 | bne 1002b |
| 30 | .endm |
| 31 | |
| 32 | .macro waituart,rd,rx |
| 33 | 1001: ldr \rd, [\rx, #UART_FLAG] |
| 34 | tst \rd, #UART_FLAG_BUSY |
| 35 | bne 1001b |
| 36 | .endm |