192 lines
4.3 KiB
C
192 lines
4.3 KiB
C
/*
|
|
* arch/arm/mach-rpc/include/mach/uncompress.h
|
|
*
|
|
* Copyright (C) 1996 Russell King
|
|
*
|
|
* 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.
|
|
*/
|
|
#define VIDMEM ((char *)SCREEN_START)
|
|
|
|
#include <linux/io.h>
|
|
#include <mach/hardware.h>
|
|
#include <asm/setup.h>
|
|
#include <asm/page.h>
|
|
|
|
int video_size_row;
|
|
unsigned char bytes_per_char_h;
|
|
extern unsigned long con_charconvtable[256];
|
|
|
|
struct param_struct {
|
|
unsigned long page_size;
|
|
unsigned long nr_pages;
|
|
unsigned long ramdisk_size;
|
|
unsigned long mountrootrdonly;
|
|
unsigned long rootdev;
|
|
unsigned long video_num_cols;
|
|
unsigned long video_num_rows;
|
|
unsigned long video_x;
|
|
unsigned long video_y;
|
|
unsigned long memc_control_reg;
|
|
unsigned char sounddefault;
|
|
unsigned char adfsdrives;
|
|
unsigned char bytes_per_char_h;
|
|
unsigned char bytes_per_char_v;
|
|
unsigned long unused[256/4-11];
|
|
};
|
|
|
|
static const unsigned long palette_4[16] = {
|
|
0x00000000,
|
|
0x000000cc,
|
|
0x0000cc00, /* Green */
|
|
0x0000cccc, /* Yellow */
|
|
0x00cc0000, /* Blue */
|
|
0x00cc00cc, /* Magenta */
|
|
0x00cccc00, /* Cyan */
|
|
0x00cccccc, /* White */
|
|
0x00000000,
|
|
0x000000ff,
|
|
0x0000ff00,
|
|
0x0000ffff,
|
|
0x00ff0000,
|
|
0x00ff00ff,
|
|
0x00ffff00,
|
|
0x00ffffff
|
|
};
|
|
|
|
#define palette_setpixel(p) *(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255)
|
|
#define palette_write(v) *(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff)
|
|
|
|
/*
|
|
* params_phys is a linker defined symbol - see
|
|
* arch/arm/boot/compressed/Makefile
|
|
*/
|
|
extern __attribute__((pure)) struct param_struct *params(void);
|
|
#define params (params())
|
|
|
|
#ifndef STANDALONE_DEBUG
|
|
unsigned long video_num_cols;
|
|
unsigned long video_num_rows;
|
|
unsigned long video_x;
|
|
unsigned long video_y;
|
|
unsigned char bytes_per_char_v;
|
|
int white;
|
|
|
|
/*
|
|
* This does not append a newline
|
|
*/
|
|
static void putc(int c)
|
|
{
|
|
extern void ll_write_char(char *, char c, char white);
|
|
int x,y;
|
|
char *ptr;
|
|
|
|
x = video_x;
|
|
y = video_y;
|
|
|
|
if (c == '\n') {
|
|
if (++y >= video_num_rows)
|
|
y--;
|
|
} else if (c == '\r') {
|
|
x = 0;
|
|
} else {
|
|
ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h);
|
|
ll_write_char(ptr, c, white);
|
|
if (++x >= video_num_cols) {
|
|
x = 0;
|
|
if ( ++y >= video_num_rows ) {
|
|
y--;
|
|
}
|
|
}
|
|
}
|
|
|
|
video_x = x;
|
|
video_y = y;
|
|
}
|
|
|
|
static inline void flush(void)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Setup for decompression
|
|
*/
|
|
static void arch_decomp_setup(void)
|
|
{
|
|
int i;
|
|
struct tag *t = (struct tag *)params;
|
|
unsigned int nr_pages = 0, page_size = PAGE_SIZE;
|
|
|
|
if (t->hdr.tag == ATAG_CORE)
|
|
{
|
|
for (; t->hdr.size; t = tag_next(t))
|
|
{
|
|
if (t->hdr.tag == ATAG_VIDEOTEXT)
|
|
{
|
|
video_num_rows = t->u.videotext.video_lines;
|
|
video_num_cols = t->u.videotext.video_cols;
|
|
bytes_per_char_h = t->u.videotext.video_points;
|
|
bytes_per_char_v = t->u.videotext.video_points;
|
|
video_x = t->u.videotext.x;
|
|
video_y = t->u.videotext.y;
|
|
}
|
|
|
|
if (t->hdr.tag == ATAG_MEM)
|
|
{
|
|
page_size = PAGE_SIZE;
|
|
nr_pages += (t->u.mem.size / PAGE_SIZE);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
nr_pages = params->nr_pages;
|
|
page_size = params->page_size;
|
|
video_num_rows = params->video_num_rows;
|
|
video_num_cols = params->video_num_cols;
|
|
video_x = params->video_x;
|
|
video_y = params->video_y;
|
|
bytes_per_char_h = params->bytes_per_char_h;
|
|
bytes_per_char_v = params->bytes_per_char_v;
|
|
}
|
|
|
|
video_size_row = video_num_cols * bytes_per_char_h;
|
|
|
|
if (bytes_per_char_h == 4)
|
|
for (i = 0; i < 256; i++)
|
|
con_charconvtable[i] =
|
|
(i & 128 ? 1 << 0 : 0) |
|
|
(i & 64 ? 1 << 4 : 0) |
|
|
(i & 32 ? 1 << 8 : 0) |
|
|
(i & 16 ? 1 << 12 : 0) |
|
|
(i & 8 ? 1 << 16 : 0) |
|
|
(i & 4 ? 1 << 20 : 0) |
|
|
(i & 2 ? 1 << 24 : 0) |
|
|
(i & 1 ? 1 << 28 : 0);
|
|
else
|
|
for (i = 0; i < 16; i++)
|
|
con_charconvtable[i] =
|
|
(i & 8 ? 1 << 0 : 0) |
|
|
(i & 4 ? 1 << 8 : 0) |
|
|
(i & 2 ? 1 << 16 : 0) |
|
|
(i & 1 ? 1 << 24 : 0);
|
|
|
|
|
|
palette_setpixel(0);
|
|
if (bytes_per_char_h == 1) {
|
|
palette_write (0);
|
|
palette_write (0x00ffffff);
|
|
for (i = 2; i < 256; i++)
|
|
palette_write (0);
|
|
white = 1;
|
|
} else {
|
|
for (i = 0; i < 256; i++)
|
|
palette_write (i < 16 ? palette_4[i] : 0);
|
|
white = 7;
|
|
}
|
|
|
|
if (nr_pages * page_size < 4096*1024) error("<4M of mem\n");
|
|
}
|
|
#endif
|