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
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/unicore32/kernel/debug-macro.S
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*
* 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
|
