1/* 2 * linux/arch/unicore32/kernel/debug-macro.S 3 * 4 * Code specific to PKUnity SoC and UniCore ISA 5 * 6 * Copyright (C) 2001-2010 GUAN Xue-tao 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * Debugging macro include header 13 */ 14#include <generated/asm-offsets.h> 15#include <mach/hardware.h> 16 17 .macro put_word_ocd, rd, rx=r16 181001: movc \rx, p1.c0, #0 19 cand.a \rx, #2 20 bne 1001b 21 movc p1.c1, \rd, #1 22 .endm 23 24#ifdef CONFIG_DEBUG_OCD 25 /* debug using UniCore On-Chip-Debugger */ 26 .macro addruart, rx 27 .endm 28 29 .macro senduart, rd, rx 30 put_word_ocd \rd, \rx 31 .endm 32 33 .macro busyuart, rd, rx 34 .endm 35 36 .macro waituart, rd, rx 37 .endm 38#else 39#define UART_CLK_DEFAULT 3686400 * 20 40 /* Uartclk = MCLK/ 2, The MCLK on my board is 3686400 * 40 */ 41#define BAUD_RATE_DEFAULT 115200 42 /* The baud rate of the serial port */ 43 44#define UART_DIVISOR_DEFAULT (UART_CLK_DEFAULT \ 45 / (16 * BAUD_RATE_DEFAULT) - 1) 46 47 .macro addruart,rx 48 mrc p0, #0, \rx, c1, c0 49 tst \rx, #1 @ MMU enabled? 50 moveq \rx, #0xee000000 @ physical base address 51 movne \rx, #0x6e000000 @ virtual address 52 53 @ We probe for the active serial port here 54 @ However, now we assume UART0 is active: epip4d 55 @ We assume r1 and r2 can be clobbered. 56 57 movl r2, #UART_DIVISOR_DEFAULT 58 mov r1, #0x80 59 str r1, [\rx, #UART_LCR_OFFSET] 60 and r1, r2, #0xff00 61 mov r1, r1, lsr #8 62 str r1, [\rx, #UART_DLH_OFFSET] 63 and r1, r2, #0xff 64 str r1, [\rx, #UART_DLL_OFFSET] 65 mov r1, #0x7 66 str r1, [\rx, #UART_FCR_OFFSET] 67 mov r1, #0x3 68 str r1, [\rx, #UART_LCR_OFFSET] 69 mov r1, #0x0 70 str r1, [\rx, #UART_IER_OFFSET] 71 .endm 72 73 .macro senduart,rd,rx 74 str \rd, [\rx, #UART_THR_OFFSET] 75 .endm 76 77 .macro waituart,rd,rx 781001: ldr \rd, [\rx, #UART_LSR_OFFSET] 79 tst \rd, #UART_LSR_THRE 80 beq 1001b 81 .endm 82 83 .macro busyuart,rd,rx 841001: ldr \rd, [\rx, #UART_LSR_OFFSET] 85 tst \rd, #UART_LSR_TEMT 86 bne 1001b 87 .endm 88#endif 89 90