| /* |
| * linux/arch/unicore32/kernel/debug-macro.S |
| * |
| * Code specific to PKUnity SoC and UniCore ISA |
| * |
| * Copyright (C) 2001-2010 GUAN Xue-tao |
| * |
| * 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. |
| * |
| * Debugging macro include header |
| */ |
| #include <generated/asm-offsets.h> |
| #include <mach/hardware.h> |
| |
| .macro put_word_ocd, rd, rx=r16 |
| 1001: movc \rx, p1.c0, #0 |
| cand.a \rx, #2 |
| bne 1001b |
| movc p1.c1, \rd, #1 |
| .endm |
| |
| #ifdef CONFIG_DEBUG_OCD |
| /* debug using UniCore On-Chip-Debugger */ |
| .macro addruart, rx |
| .endm |
| |
| .macro senduart, rd, rx |
| put_word_ocd \rd, \rx |
| .endm |
| |
| .macro busyuart, rd, rx |
| .endm |
| |
| .macro waituart, rd, rx |
| .endm |
| #else |
| #define UART_CLK_DEFAULT 3686400 * 20 |
| /* Uartclk = MCLK/ 2, The MCLK on my board is 3686400 * 40 */ |
| #define BAUD_RATE_DEFAULT 115200 |
| /* The baud rate of the serial port */ |
| |
| #define UART_DIVISOR_DEFAULT (UART_CLK_DEFAULT \ |
| / (16 * BAUD_RATE_DEFAULT) - 1) |
| |
| .macro addruart,rx |
| mrc p0, #0, \rx, c1, c0 |
| tst \rx, #1 @ MMU enabled? |
| moveq \rx, #0xee000000 @ physical base address |
| movne \rx, #0x6e000000 @ virtual address |
| |
| @ We probe for the active serial port here |
| @ However, now we assume UART0 is active: epip4d |
| @ We assume r1 and r2 can be clobbered. |
| |
| movl r2, #UART_DIVISOR_DEFAULT |
| mov r1, #0x80 |
| str r1, [\rx, #UART_LCR_OFFSET] |
| and r1, r2, #0xff00 |
| mov r1, r1, lsr #8 |
| str r1, [\rx, #UART_DLH_OFFSET] |
| and r1, r2, #0xff |
| str r1, [\rx, #UART_DLL_OFFSET] |
| mov r1, #0x7 |
| str r1, [\rx, #UART_FCR_OFFSET] |
| mov r1, #0x3 |
| str r1, [\rx, #UART_LCR_OFFSET] |
| mov r1, #0x0 |
| str r1, [\rx, #UART_IER_OFFSET] |
| .endm |
| |
| .macro senduart,rd,rx |
| str \rd, [\rx, #UART_THR_OFFSET] |
| .endm |
| |
| .macro waituart,rd,rx |
| 1001: ldr \rd, [\rx, #UART_LSR_OFFSET] |
| tst \rd, #UART_LSR_THRE |
| beq 1001b |
| .endm |
| |
| .macro busyuart,rd,rx |
| 1001: ldr \rd, [\rx, #UART_LSR_OFFSET] |
| tst \rd, #UART_LSR_TEMT |
| bne 1001b |
| .endm |
| #endif |
| |
