diff options
Diffstat (limited to 'include/asm-arm26/uncompress.h')
-rw-r--r-- | include/asm-arm26/uncompress.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/include/asm-arm26/uncompress.h b/include/asm-arm26/uncompress.h new file mode 100644 index 0000000..df2cba8 --- /dev/null +++ b/include/asm-arm26/uncompress.h @@ -0,0 +1,111 @@ +/* + * linux/include/asm-arm/arch-arc/uncompress.h + * + * Copyright (C) 1996 Russell King + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#define VIDMEM ((char *)0x02000000) + +int video_num_columns, video_num_lines, video_size_row; +int white, bytes_per_char_h; +extern unsigned long con_charconvtable[256]; + +struct param_struct { + unsigned long page_size; + unsigned long nr_pages; + unsigned long ramdisk_size; + unsigned long mountrootrdonly; + unsigned long rootdev; + unsigned long video_num_cols; + unsigned long video_num_rows; + unsigned long video_x; + unsigned long video_y; + unsigned long memc_control_reg; + unsigned char sounddefault; + unsigned char adfsdrives; + unsigned char bytes_per_char_h; + unsigned char bytes_per_char_v; + unsigned long unused[256/4-11]; +}; + +static struct param_struct *params = (struct param_struct *)0x0207c000; + +/* + * This does not append a newline + */ +static void puts(const char *s) +{ + extern void ll_write_char(char *, unsigned long); + int x,y; + unsigned char c; + char *ptr; + + x = params->video_x; + y = params->video_y; + + while ( ( c = *(unsigned char *)s++ ) != '\0' ) { + if ( c == '\n' ) { + x = 0; + if ( ++y >= video_num_lines ) { + y--; + } + } else { + ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h); + ll_write_char(ptr, c|(white<<16)); + if ( ++x >= video_num_columns ) { + x = 0; + if ( ++y >= video_num_lines ) { + y--; + } + } + } + } + + params->video_x = x; + params->video_y = y; +} + +static void error(char *x); + +/* + * Setup for decompression + */ +static void arch_decomp_setup(void) +{ + int i; + + video_num_lines = params->video_num_rows; + video_num_columns = params->video_num_cols; + bytes_per_char_h = params->bytes_per_char_h; + video_size_row = video_num_columns * bytes_per_char_h; + if (bytes_per_char_h == 4) + for (i = 0; i < 256; i++) + con_charconvtable[i] = + (i & 128 ? 1 << 0 : 0) | + (i & 64 ? 1 << 4 : 0) | + (i & 32 ? 1 << 8 : 0) | + (i & 16 ? 1 << 12 : 0) | + (i & 8 ? 1 << 16 : 0) | + (i & 4 ? 1 << 20 : 0) | + (i & 2 ? 1 << 24 : 0) | + (i & 1 ? 1 << 28 : 0); + else + for (i = 0; i < 16; i++) + con_charconvtable[i] = + (i & 8 ? 1 << 0 : 0) | + (i & 4 ? 1 << 8 : 0) | + (i & 2 ? 1 << 16 : 0) | + (i & 1 ? 1 << 24 : 0); + + white = bytes_per_char_h == 8 ? 0xfc : 7; + + if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n"); +} + +/* + * nothing to do + */ +#define arch_decomp_wdog() |