include/asm-arm/arch-rpc/uncompress.h

   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
  15 int video_num_columns, video_num_lines, video_size_row;
  16 int white, bytes_per_char_h;
  17 extern unsigned long con_charconvtable[256];
  18
  19 struct 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
  37 static 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  */
  63 extern __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  */
  70 static 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
  99 static inline void flush(void)
 100 {
 101 }
 102
 103 static void error(char *x);
 104
 105 /*
 106  * Setup for decompression
 107  */
 108 static 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()