1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
| /*
| * 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
|
|
