diff options
Diffstat (limited to 'kernel/arch/arm/mach-rpc/include/mach/uncompress.h')
| -rw-r--r-- | kernel/arch/arm/mach-rpc/include/mach/uncompress.h | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-rpc/include/mach/uncompress.h b/kernel/arch/arm/mach-rpc/include/mach/uncompress.h new file mode 100644 index 000000000..0fd4b0b8e --- /dev/null +++ b/kernel/arch/arm/mach-rpc/include/mach/uncompress.h @@ -0,0 +1,191 @@ +/* + * arch/arm/mach-rpc/include/mach/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 *)SCREEN_START) + +#include <linux/io.h> +#include <mach/hardware.h> +#include <asm/setup.h> +#include <asm/page.h> + +int video_size_row; +unsigned char 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 const unsigned long palette_4[16] = { + 0x00000000, + 0x000000cc, + 0x0000cc00, /* Green */ + 0x0000cccc, /* Yellow */ + 0x00cc0000, /* Blue */ + 0x00cc00cc, /* Magenta */ + 0x00cccc00, /* Cyan */ + 0x00cccccc, /* White */ + 0x00000000, + 0x000000ff, + 0x0000ff00, + 0x0000ffff, + 0x00ff0000, + 0x00ff00ff, + 0x00ffff00, + 0x00ffffff +}; + +#define palette_setpixel(p) *(unsigned long *)(IO_START+0x00400000) = 0x10000000|((p) & 255) +#define palette_write(v) *(unsigned long *)(IO_START+0x00400000) = 0x00000000|((v) & 0x00ffffff) + +/* + * params_phys is a linker defined symbol - see + * arch/arm/boot/compressed/Makefile + */ +extern __attribute__((pure)) struct param_struct *params(void); +#define params (params()) + +#ifndef STANDALONE_DEBUG +unsigned long video_num_cols; +unsigned long video_num_rows; +unsigned long video_x; +unsigned long video_y; +unsigned char bytes_per_char_v; +int white; + +/* + * This does not append a newline + */ +static void putc(int c) +{ + extern void ll_write_char(char *, char c, char white); + int x,y; + char *ptr; + + x = video_x; + y = video_y; + + if (c == '\n') { + if (++y >= video_num_rows) + y--; + } else if (c == '\r') { + x = 0; + } else { + ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h); + ll_write_char(ptr, c, white); + if (++x >= video_num_cols) { + x = 0; + if ( ++y >= video_num_rows ) { + y--; + } + } + } + + video_x = x; + video_y = y; +} + +static inline void flush(void) +{ +} + +/* + * Setup for decompression + */ +static void arch_decomp_setup(void) +{ + int i; + struct tag *t = (struct tag *)params; + unsigned int nr_pages = 0, page_size = PAGE_SIZE; + + if (t->hdr.tag == ATAG_CORE) + { + for (; t->hdr.size; t = tag_next(t)) + { + if (t->hdr.tag == ATAG_VIDEOTEXT) + { + video_num_rows = t->u.videotext.video_lines; + video_num_cols = t->u.videotext.video_cols; + bytes_per_char_h = t->u.videotext.video_points; + bytes_per_char_v = t->u.videotext.video_points; + video_x = t->u.videotext.x; + video_y = t->u.videotext.y; + } + + if (t->hdr.tag == ATAG_MEM) + { + page_size = PAGE_SIZE; + nr_pages += (t->u.mem.size / PAGE_SIZE); + } + } + } + else + { + nr_pages = params->nr_pages; + page_size = params->page_size; + video_num_rows = params->video_num_rows; + video_num_cols = params->video_num_cols; + video_x = params->video_x; + video_y = params->video_y; + bytes_per_char_h = params->bytes_per_char_h; + bytes_per_char_v = params->bytes_per_char_v; + } + + video_size_row = video_num_cols * 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); + + + palette_setpixel(0); + if (bytes_per_char_h == 1) { + palette_write (0); + palette_write (0x00ffffff); + for (i = 2; i < 256; i++) + palette_write (0); + white = 1; + } else { + for (i = 0; i < 256; i++) + palette_write (i < 16 ? palette_4[i] : 0); + white = 7; + } + + if (nr_pages * page_size < 4096*1024) error("<4M of mem\n"); +} +#endif |