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 15int video_num_columns, video_num_lines, video_size_row; 16int white, bytes_per_char_h; 17extern unsigned long con_charconvtable[256]; 18 19struct 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 37static 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 */ 63extern __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 */ 70static 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 99static inline void flush(void) 100{ 101} 102 103static void error(char *x); 104 105/* 106 * Setup for decompression 107 */ 108static 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() 157