projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d8a00916 CC |
1 | /* |
| 2 | * Copyright (C) 2014 Carlo Caione | |
| 3 | * Carlo Caione <carlo@caione.org> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | */ | |
| 9 | ||
| 10 | #define MESON_AO_UART_WFIFO 0x0 | |
| 11 | #define MESON_AO_UART_STATUS 0xc | |
| 12 | ||
| 13 | #define MESON_AO_UART_TX_FIFO_EMPTY (1 << 22) | |
| 14 | #define MESON_AO_UART_TX_FIFO_FULL (1 << 21) | |
| 15 | ||
| 16 | .macro addruart, rp, rv, tmp | |
| 17 | ldr \rp, =(CONFIG_DEBUG_UART_PHYS) @ physical | |
| 18 | ldr \rv, =(CONFIG_DEBUG_UART_VIRT) @ virtual | |
| 19 | .endm | |
| 20 | ||
| 21 | .macro senduart,rd,rx | |
| 22 | str \rd, [\rx, #MESON_AO_UART_WFIFO] | |
| 23 | .endm | |
| 24 | ||
| 25 | .macro busyuart,rd,rx | |
| 26 | 1002: ldr \rd, [\rx, #MESON_AO_UART_STATUS] | |
| 27 | tst \rd, #MESON_AO_UART_TX_FIFO_EMPTY | |
| 28 | beq 1002b | |
| 29 | .endm | |
| 30 | ||
| 31 | .macro waituart,rd,rx | |
| 32 | 1001: ldr \rd, [\rx, #MESON_AO_UART_STATUS] | |
| 33 | tst \rd, #MESON_AO_UART_TX_FIFO_FULL | |
| 34 | bne 1001b | |
| 35 | .endm |