1/*
2 *  linux/include/asm-arm/arch-rpc/uncompress.h
3 *
4 *  Copyright (C) 1996 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10#define VIDMEM ((char *)SCREEN_START)
11
12#include <asm/hardware.h>
13#include <asm/io.h>
14
15int video_num_columns, video_num_lines, video_size_row;
16int white, bytes_per_char_h;
17extern unsigned long con_charconvtable[256];
18
19struct param_struct {
20	unsigned long page_size;
21	unsigned long nr_pages;
22	unsigned long ramdisk_size;
23	unsigned long mountrootrdonly;
24	unsigned long rootdev;
25	unsigned long video_num_cols;
26	unsigned long video_num_rows;
27	unsigned long video_x;
28	unsigned long video_y;
29	unsigned long memc_control_reg;
30	unsigned char sounddefault;
31	unsigned char adfsdrives;
32	unsigned char bytes_per_char_h;
33	unsigned char bytes_per_char_v;
34	unsigned long unused[256/4-11];
35};
36
37static const unsigned long palette_4[16] = {
38	0x00000000,
39	0x000000cc,
40	0x0000cc00,             /* Green   */
41	0x0000cccc,             /* Yellow  */
42	0x00cc0000,             /* Blue    */
43	0x00cc00cc,             /* Magenta */
44	0x00cccc00,             /* Cyan    */
45	0x00cccccc,             /* White   */
46	0x00000000,
47	0x000000ff,
48	0x0000ff00,
49	0x0000ffff,
50	0x00ff0000,
51	0x00ff00ff,
52	0x00ffff00,
53	0x00ffffff
54};
55
56#define palette_setpixel(p)	*(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255)
57#define palette_write(v)	*(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff)
58
59/*
60 * params_phys is a linker defined symbol - see
61 * arch/arm/boot/compressed/Makefile
62 */
63extern __attribute__((pure)) struct param_struct *params(void);
64#define params (params())
65
66#ifndef STANDALONE_DEBUG
67/*
68 * This does not append a newline
69 */
70static void putc(int c)
71{
72	extern void ll_write_char(char *, char c, char white);
73	int x,y;
74	char *ptr;
75
76	x = params->video_x;
77	y = params->video_y;
78
79	if (c == '\n') {
80		if (++y >= video_num_lines)
81			y--;
82	} else if (c == '\r') {
83		x = 0;
84	} else {
85		ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
86		ll_write_char(ptr, c, white);
87		if (++x >= video_num_columns) {
88			x = 0;
89			if ( ++y >= video_num_lines ) {
90				y--;
91			}
92		}
93	}
94
95	params->video_x = x;
96	params->video_y = y;
97}
98
99static inline void flush(void)
100{
101}
102
103static void error(char *x);
104
105/*
106 * Setup for decompression
107 */
108static void arch_decomp_setup(void)
109{
110	int i;
111
112	video_num_lines = params->video_num_rows;
113	video_num_columns = params->video_num_cols;
114	bytes_per_char_h = params->bytes_per_char_h;
115	video_size_row = video_num_columns * bytes_per_char_h;
116	if (bytes_per_char_h == 4)
117		for (i = 0; i < 256; i++)
118			con_charconvtable[i] =
119				(i & 128 ? 1 << 0  : 0) |
120				(i & 64  ? 1 << 4  : 0) |
121				(i & 32  ? 1 << 8  : 0) |
122				(i & 16  ? 1 << 12 : 0) |
123				(i & 8   ? 1 << 16 : 0) |
124				(i & 4   ? 1 << 20 : 0) |
125				(i & 2   ? 1 << 24 : 0) |
126				(i & 1   ? 1 << 28 : 0);
127	else
128		for (i = 0; i < 16; i++)
129			con_charconvtable[i] =
130				(i & 8   ? 1 << 0  : 0) |
131				(i & 4   ? 1 << 8  : 0) |
132				(i & 2   ? 1 << 16 : 0) |
133				(i & 1   ? 1 << 24 : 0);
134
135
136	palette_setpixel(0);
137	if (bytes_per_char_h == 1) {
138		palette_write (0);
139		palette_write (0x00ffffff);
140		for (i = 2; i < 256; i++)
141			palette_write (0);
142		white = 1;
143	} else {
144		for (i = 0; i < 256; i++)
145			palette_write (i < 16 ? palette_4[i] : 0);
146		white = 7;
147	}
148
149	if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
150}
151#endif
152
153/*
154 * nothing to do
155 */
156#define arch_decomp_wdog()
157