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112 lines
2.5 KiB
112 lines
2.5 KiB
20 years ago
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/*
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* linux/include/asm-arm/arch-arc/uncompress.h
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*
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* Copyright (C) 1996 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#define VIDMEM ((char *)0x02000000)
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int video_num_columns, video_num_lines, video_size_row;
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int white, bytes_per_char_h;
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extern unsigned long con_charconvtable[256];
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struct param_struct {
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unsigned long page_size;
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unsigned long nr_pages;
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unsigned long ramdisk_size;
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unsigned long mountrootrdonly;
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unsigned long rootdev;
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unsigned long video_num_cols;
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unsigned long video_num_rows;
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unsigned long video_x;
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unsigned long video_y;
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unsigned long memc_control_reg;
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unsigned char sounddefault;
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unsigned char adfsdrives;
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unsigned char bytes_per_char_h;
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unsigned char bytes_per_char_v;
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unsigned long unused[256/4-11];
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};
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static struct param_struct *params = (struct param_struct *)0x0207c000;
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/*
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* This does not append a newline
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*/
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static void puts(const char *s)
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{
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extern void ll_write_char(char *, unsigned long);
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int x,y;
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unsigned char c;
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char *ptr;
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x = params->video_x;
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y = params->video_y;
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while ( ( c = *(unsigned char *)s++ ) != '\0' ) {
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if ( c == '\n' ) {
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x = 0;
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if ( ++y >= video_num_lines ) {
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y--;
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}
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} else {
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ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
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ll_write_char(ptr, c|(white<<16));
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if ( ++x >= video_num_columns ) {
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x = 0;
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if ( ++y >= video_num_lines ) {
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y--;
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}
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}
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}
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}
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params->video_x = x;
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params->video_y = y;
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}
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static void error(char *x);
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/*
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* Setup for decompression
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*/
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static void arch_decomp_setup(void)
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{
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int i;
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video_num_lines = params->video_num_rows;
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video_num_columns = params->video_num_cols;
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bytes_per_char_h = params->bytes_per_char_h;
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video_size_row = video_num_columns * bytes_per_char_h;
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if (bytes_per_char_h == 4)
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for (i = 0; i < 256; i++)
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con_charconvtable[i] =
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(i & 128 ? 1 << 0 : 0) |
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(i & 64 ? 1 << 4 : 0) |
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(i & 32 ? 1 << 8 : 0) |
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(i & 16 ? 1 << 12 : 0) |
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(i & 8 ? 1 << 16 : 0) |
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(i & 4 ? 1 << 20 : 0) |
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(i & 2 ? 1 << 24 : 0) |
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(i & 1 ? 1 << 28 : 0);
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else
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for (i = 0; i < 16; i++)
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con_charconvtable[i] =
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(i & 8 ? 1 << 0 : 0) |
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(i & 4 ? 1 << 8 : 0) |
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(i & 2 ? 1 << 16 : 0) |
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(i & 1 ? 1 << 24 : 0);
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white = bytes_per_char_h == 8 ? 0xfc : 7;
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if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
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}
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/*
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* nothing to do
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*/
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#define arch_decomp_wdog()
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