include/asm-arm26/uncompress.h

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