1/* arch/arm/mach-s3c2410/include/mach/debug-macro.S
2 *
3 * Debugging macro include header
4 *
5 *  Copyright (C) 1994-1999 Russell King
6 *  Copyright (C) 2005 Simtec Electronics
7 *
8 *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13*/
14
15#include <mach/map.h>
16#include <mach/regs-gpio.h>
17#include <plat/regs-serial.h>
18
19#define S3C2410_UART1_OFF (0x4000)
20#define SHIFT_2440TXF (14-9)
21
22	.macro addruart, rp, rv, tmp
23		ldr	\rp, = S3C24XX_PA_UART
24		ldr	\rv, = S3C24XX_VA_UART
25#if CONFIG_DEBUG_S3C_UART != 0
26		add	\rp, \rp, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C_UART)
27		add	\rv, \rv, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C_UART)
28#endif
29	.endm
30
31	.macro fifo_full_s3c24xx rd, rx
32		@ check for arm920 vs arm926. currently assume all arm926
33		@ devices have an 64 byte FIFO identical to the s3c2440
34		mrc	p15, 0, \rd, c0, c0
35		and	\rd, \rd, #0xff0
36		teq	\rd, #0x260
37		beq	1004f
38		mrc	p15, 0, \rd, c1, c0
39		tst	\rd, #1
40		addeq	\rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
41		addne	\rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
42		bic	\rd, \rd, #0xff000
43		ldr	\rd, [\rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0)]
44		and	\rd, \rd, #0x00ff0000
45		teq	\rd, #0x00440000		@ is it 2440?
461004:
47		ldr	\rd, [\rx, # S3C2410_UFSTAT]
48		moveq	\rd, \rd, lsr #SHIFT_2440TXF
49		tst	\rd, #S3C2410_UFSTAT_TXFULL
50	.endm
51
52	.macro  fifo_full_s3c2410 rd, rx
53		ldr	\rd, [\rx, # S3C2410_UFSTAT]
54		tst	\rd, #S3C2410_UFSTAT_TXFULL
55	.endm
56
57/* fifo level reading */
58
59	.macro fifo_level_s3c24xx rd, rx
60		@ check for arm920 vs arm926. currently assume all arm926
61		@ devices have an 64 byte FIFO identical to the s3c2440
62		mrc	p15, 0, \rd, c0, c0
63		and	\rd, \rd, #0xff0
64		teq	\rd, #0x260
65		beq	10000f
66		mrc	p15, 0, \rd, c1, c0
67		tst	\rd, #1
68		addeq	\rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
69		addne	\rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
70		bic	\rd, \rd, #0xff000
71		ldr	\rd, [\rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0)]
72		and	\rd, \rd, #0x00ff0000
73		teq	\rd, #0x00440000		@ is it 2440?
74
7510000:
76		ldr	\rd, [\rx, # S3C2410_UFSTAT]
77		andne	\rd, \rd, #S3C2410_UFSTAT_TXMASK
78		andeq	\rd, \rd, #S3C2440_UFSTAT_TXMASK
79	.endm
80
81	.macro fifo_level_s3c2410 rd, rx
82		ldr	\rd, [\rx, # S3C2410_UFSTAT]
83		and	\rd, \rd, #S3C2410_UFSTAT_TXMASK
84	.endm
85
86/* Select the correct implementation depending on the configuration. The
87 * S3C2440 will get selected by default, as these are the most widely
88 * used variants of these
89*/
90
91#if defined(CONFIG_CPU_LLSERIAL_S3C2410_ONLY)
92#define fifo_full  fifo_full_s3c2410
93#define fifo_level fifo_level_s3c2410
94#elif !defined(CONFIG_CPU_LLSERIAL_S3C2440_ONLY)
95#define fifo_full  fifo_full_s3c24xx
96#define fifo_level fifo_level_s3c24xx
97#endif
98
99/* include the reset of the code which will do the work */
100
101#include <plat/debug-macro.S>
102