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28bab059 G |
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 |