diff options
Diffstat (limited to 'bootblocks/bootelks.c')
| -rw-r--r-- | bootblocks/bootelks.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/bootblocks/bootelks.c b/bootblocks/bootelks.c deleted file mode 100644 index a236e6f..0000000 --- a/bootblocks/bootelks.c +++ /dev/null @@ -1,194 +0,0 @@ - -#include <dos.h> -#include "minix.h" - -extern union REGS __argr; -int x86_test = 0; -unsigned int boot_mem_top = 0; - -void mem_check(); - -int boot_drive = 0; -long boot_offset = 0; -int boot_spt = 0; - -char dirname[16] = "boot"; -char imagename[16] = "linux"; - -char lbuf[80]; - -int serr(); -int (*read_sector)() = serr; - -struct super_block b_super; -d_inode b_inode[INODES_PER_BLOCK]; -zone_nr b_zone[NR_INDIRECTS]; -/* dir_struct directory[]; */ - -main() -{ - writes("Booting Elks...."); - - mem_check(); - - writes("\nSystem has "); - writes(itoa(boot_mem_top/64)); - writes("k of low memory\n"); - - boot_drive = __argr.h.dl; - boot_offset = __argr.x.cx; - boot_offset += ((long)__argr.h.dh << 16); - boot_spt = __argr.x.si; - - relocator(-1); - - writes("Relocated code to "); - writes(itoa(__get_cs()/64)); - writes("k.\n"); - - writes("Booting from "); - if( boot_drive & 0x80 ) writes("hard"); - else writes("floppy"); - writes(" drive "); - writes(itoa(boot_drive&0x7F)); - if( boot_offset ) - { - writes(" offset "); - writes(ltoa(boot_offset)); - writes(" sectors"); - } - writes("\n"); - - if( boot_drive & 0x80 ) init_hd(boot_drive); - else init_fd(boot_drive); - - if( load_dir(0) >= 0 && load_dir(dirname) >= 0 && load_file(imagename) >= 0 ) - run_elks(); - else if( load_dir(0) >= 0 && load_file(imagename) >= 0 ) - run_elks(); - else - { - writes("Cannot find kernel image file\n"); - read(0, lbuf, 1); exit(1); - } - - read(0, lbuf, sizeof(lbuf)); -} - -init_fd(drive) { } -init_hd(drive) { } -load_dir(name) { return -1; } -load_file(name) { return -1; } -run_elks() { } - -/****************************************************************************/ - -writes(str) -char * str; -{ - write(1, str, strlen(str)); -} - -void mem_check() -{ -#asm - int 0x12 ! Amount of boot memory - mov cl,#6 - sal ax,cl ! In segments - mov [_boot_mem_top],ax -#endasm -} - -serr() -{ - writes("Cannot read sector, drive not initilised\n"); - return -1; -} - -/****************************************************************************/ - -load_blocks() -{ - if( b_super.s_magic != SUPER_MAGIC ) return -1; - -try_again:; -#ifdef zone_shift - if( zone_shift != b_super.s_log_zone_size) return -1; -#else - zone_shift = b_super.s_log_zone_size; -#endif - - inode--; - load_block(seg_of(b_inode), inode/INODES_PER_BLOCK - + b_super.s_imap_blocks - + b_super.s_zmap_blocks - + 2); - get_now(); - - ldaddr = LOADSEG; /* Load at 64k mark */ - - { - register d_inode * i_ptr; - i_ptr = b_inode + inode%INODES_PER_BLOCK; - next_zone = i_ptr->i_zone; - flength = i_ptr->i_size; - if( (i_ptr->i_mode & I_TYPE) == I_DIRECTORY ) - { - ldaddr = seg_of(directory); - inode = 0; /* Mark - we've no _file_ inode yet */ - } - } - - end_zone = next_zone+NR_DZONE_NUM; - load_zone(seg_of(b_zone), (indirect = next_zone[NR_DZONE_NUM])); - get_now(); - - for(;;) - { - if( next_zone >= end_zone ) - { - if( indirect != 0 ) - { - next_zone = b_zone; - end_zone = next_zone + NR_INDIRECTS; - indirect = 0; - continue; - } - break; - } - load_zone(ldaddr, *next_zone); - next_zone++; - ldaddr += (seg_at(1) << zone_shift); - } - get_now(); - - if(!inode) - { - dirptr = directory; - while(flength > 0) - { -register char * s = bootfile; -register char * p = dirptr->d_name; - - if( dirptr->d_inum ) - { - for(;;) - { - if( *s == '\0') - { - if(*p == '\0') - { - inode = dirptr->d_inum; - goto try_again; - } - break; - } - if( *s++ != *p++ ) break; - } - } - flength -= 16; - dirptr++; - } - nogood(); - } -} |