GuanXuetao | 28bab05 | 2011-01-15 18:22:19 +0800 | [diff] [blame] | 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 |
| 18 | 1001: 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 |
| 78 | 1001: ldr \rd, [\rx, #UART_LSR_OFFSET] |
| 79 | tst \rd, #UART_LSR_THRE |
| 80 | beq 1001b |
| 81 | .endm |
| 82 | |
| 83 | .macro busyuart,rd,rx |
| 84 | 1001: ldr \rd, [\rx, #UART_LSR_OFFSET] |
| 85 | tst \rd, #UART_LSR_TEMT |
| 86 | bne 1001b |
| 87 | .endm |
| 88 | #endif |
| 89 | |