| /* |
| * Early serial debug output macro for Keystone SOCs |
| * |
| * Copyright 2013 Texas Instruments, Inc. |
| * Santosh Shilimkar <santosh.shilimkar@ti.com> |
| * |
| * Based on RMKs low level debug code. |
| * Copyright (C) 1994-1999 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> |
| |
| #define UART_SHIFT 2 |
| #if defined(CONFIG_DEBUG_KEYSTONE_UART0) |
| #define UART_PHYS 0x02530c00 |
| #define UART_VIRT 0xfeb30c00 |
| #elif defined(CONFIG_DEBUG_KEYSTONE_UART1) |
| #define UART_PHYS 0x02531000 |
| #define UART_VIRT 0xfeb31000 |
| #endif |
| |
| .macro addruart, rp, rv, tmp |
| ldr \rv, =UART_VIRT @ physical base address |
| ldr \rp, =UART_PHYS @ virtual base address |
| .endm |
| |
| .macro senduart,rd,rx |
| str \rd, [\rx, #UART_TX << UART_SHIFT] |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1002: ldr \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 |
| .endm |
