LXR linux/arch/arm26/boot/compressed/uncompress.h

   1/*
   2 *
   3 *  Copyright (C) 1996 Russell King
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License version 2 as
   7 * published by the Free Software Foundation.
   8 */
   9#define VIDMEM ((char *)0x02000000)
  10 
  11int video_num_columns, video_num_lines, video_size_row;
  12int white, bytes_per_char_h;
  13extern unsigned long con_charconvtable[256];
  14
  15struct param_struct {
  16        unsigned long page_size;
  17        unsigned long nr_pages;
  18        unsigned long ramdisk_size;
  19        unsigned long mountrootrdonly;
  20        unsigned long rootdev;
  21        unsigned long video_num_cols;
  22        unsigned long video_num_rows;
  23        unsigned long video_x;
  24        unsigned long video_y;
  25        unsigned long memc_control_reg;
  26        unsigned char sounddefault;
  27        unsigned char adfsdrives;
  28        unsigned char bytes_per_char_h;
  29        unsigned char bytes_per_char_v;
  30        unsigned long unused[256/4-11];
  31};
  32
  33static struct param_struct *params = (struct param_struct *)0x0207c000;
  34 
  35/*
  36 * This does not append a newline
  37 */
  38static void puts(const char *s)
  39{
  40        extern void ll_write_char(char *, unsigned long);
  41        int x,y;
  42        unsigned char c;
  43        char *ptr;
  44
  45        x = params->video_x;
  46        y = params->video_y;
  47
  48        while ( ( c = *(unsigned char *)s++ ) != '\0' ) {
  49                if ( c == '\n' ) {
  50                        x = 0;
  51                        if ( ++y >= video_num_lines ) {
  52                                y--;
  53                        }
  54                } else {
  55                        ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
  56                        ll_write_char(ptr, c|(white<<16));
  57                        if ( ++x >= video_num_columns ) {
  58                                x = 0;
  59                                if ( ++y >= video_num_lines ) {
  60                                        y--;
  61                                }
  62                        }
  63                }
  64        }
  65
  66        params->video_x = x;
  67        params->video_y = y;
  68}
  69
  70static void error(char *x);
  71
  72/*
  73 * Setup for decompression
  74 */
  75static void arch_decomp_setup(void)
  76{
  77        int i;
  78        
  79        video_num_lines = params->video_num_rows;
  80        video_num_columns = params->video_num_cols;
  81        bytes_per_char_h = params->bytes_per_char_h;
  82        video_size_row = video_num_columns * bytes_per_char_h;
  83        if (bytes_per_char_h == 4)
  84                for (i = 0; i < 256; i++)
  85                        con_charconvtable[i] =
  86                                (i & 128 ? 1 << 0  : 0) |
  87                                (i & 64  ? 1 << 4  : 0) |
  88                                (i & 32  ? 1 << 8  : 0) |
  89                                (i & 16  ? 1 << 12 : 0) |
  90                                (i & 8   ? 1 << 16 : 0) |
  91                                (i & 4   ? 1 << 20 : 0) |
  92                                (i & 2   ? 1 << 24 : 0) |
  93                                (i & 1   ? 1 << 28 : 0);
  94        else
  95                for (i = 0; i < 16; i++)
  96                        con_charconvtable[i] =
  97                                (i & 8   ? 1 << 0  : 0) |
  98                                (i & 4   ? 1 << 8  : 0) |
  99                                (i & 2   ? 1 << 16 : 0) |
 100                                (i & 1   ? 1 << 24 : 0);
 101
 102        white = bytes_per_char_h == 8 ? 0xfc : 7;
 103
 104        if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
 105}
 106
 107/*
 108 * nothing to do
 109 */
 110#define arch_decomp_wdog()
 111