Subversion Repositories or1k_old

/*

 * linux/include/asm-arm/arch-a5k/uncompress.h

 *

 * Copyright (C) 1996 Russell King

 */

#define VIDMEM ((char *)SCREEN_START)

#include "../arch/arm/drivers/char/font.h"

#include <asm/hardware.h>

#include <asm/io.h>

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 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)

static struct param_struct * const params = (struct param_struct *)Z_PARAMS_BASE;

/*

 * 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<<8));

                        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);

        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 (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");

}