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