| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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() |