| /* | |
| * arch/arm/include/debug/8250.S | |
| * | |
| * Copyright (C) 1994-2013 Russell King | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License version 2 as | |
| * published by the Free Software Foundation. | |
| */ | |
| #include <linux/serial_reg.h> | |
| .macro addruart, rp, rv, tmp | |
| ldr \rp, =CONFIG_DEBUG_UART_PHYS | |
| ldr \rv, =CONFIG_DEBUG_UART_VIRT | |
| .endm | |
| #ifdef CONFIG_DEBUG_UART_8250_WORD | |
| .macro store, rd, rx:vararg | |
| ARM_BE8(rev \rd, \rd) | |
| str \rd, \rx | |
| ARM_BE8(rev \rd, \rd) | |
| .endm | |
| .macro load, rd, rx:vararg | |
| ldr \rd, \rx | |
| ARM_BE8(rev \rd, \rd) | |
| .endm | |
| #else | |
| .macro store, rd, rx:vararg | |
| strb \rd, \rx | |
| .endm | |
| .macro load, rd, rx:vararg | |
| ldrb \rd, \rx | |
| .endm | |
| #endif | |
| #define UART_SHIFT CONFIG_DEBUG_UART_8250_SHIFT | |
| .macro senduart,rd,rx | |
| store \rd, [\rx, #UART_TX << UART_SHIFT] | |
| .endm | |
| .macro busyuart,rd,rx | |
| 1002: load \rd, [\rx, #UART_LSR << UART_SHIFT] | |
| and \rd, \rd, #UART_LSR_TEMT | UART_LSR_THRE | |
| teq \rd, #UART_LSR_TEMT | UART_LSR_THRE | |
| bne 1002b | |
| .endm | |
| .macro waituart,rd,rx | |
| #ifdef CONFIG_DEBUG_UART_8250_FLOW_CONTROL | |
| 1001: load \rd, [\rx, #UART_MSR << UART_SHIFT] | |
| tst \rd, #UART_MSR_CTS | |
| beq 1001b | |
| #endif | |
| .endm |