| FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ) |
| |
| #include <config/console.h> |
| |
| .text |
| .arch i386 |
| .section ".prefix", "awx", @progbits |
| .code16 |
| .org 0 |
| |
| #include "mbr.S" |
| |
| /* Partition table: 64 heads, 32 sectors/track (ZIP-drive compatible) */ |
| #define HEADS 64 |
| #define SECTORS 32 |
| #define CYLADDR(cyl) ((((cyl) * HEADS + (((cyl) == 0) & 1)) * SECTORS) * 512) |
| |
| #ifdef CONSOLE_INT13 |
| #define LOGPART 1 |
| #define LOGSTART 0 |
| #define LOGCOUNT 1 |
| #define BOOTSTART 1 |
| #define BOOTCOUNT 2 |
| #else /* CONSOLE_INT13 */ |
| #define LOGPART 0 |
| #define BOOTSTART 0 |
| #define BOOTCOUNT 2 |
| #endif /* CONSOLE_INT13 */ |
| |
| /* Construct a C/H/S address */ |
| .macro chs cylinder, head, sector |
| .byte \head |
| .byte (((\cylinder & 0x300) >> 2) | \sector) |
| .byte (\cylinder & 0x0ff) |
| .endm |
| |
| /* Construct a linear address */ |
| .macro linear cylinders, heads, sectors |
| .long ((((\cylinders * HEADS) + \heads) * SECTORS) + \sectors - 1) |
| .endm |
| |
| /* Construct a partition table entry */ |
| .macro partition bootflag, type, start, count |
| .byte \bootflag |
| chs \start, ((\start == 0) & 1), 1 |
| .byte \type |
| chs (\start + \count - 1), (HEADS - 1), SECTORS |
| linear \start, ((\start == 0) & 1), 1 |
| linear \count, 0, (1 - (((\start == 0) & 1) * SECTORS)) |
| .endm |
| |
| /* Partition table */ |
| .org 446 |
| .space 16 |
| .space 16 |
| |
| /* Partition 3: log partition (for CONSOLE_INT13) */ |
| .if LOGPART |
| partition 0x00, 0xe0, LOGSTART, LOGCOUNT |
| .else |
| .space 16 |
| .endif |
| |
| /* Partition 4: boot partition */ |
| partition 0x80, 0xeb, BOOTSTART, BOOTCOUNT |
| |
| /* Disk signature */ |
| .org 510 |
| .byte 0x55, 0xaa |
| |
| /* Skip to start of log partition */ |
| .if LOGPART |
| .org CYLADDR(LOGSTART) |
| .ascii "iPXE LOG\n\n" |
| .endif |
| |
| /* Skip to start of boot partition */ |
| .org CYLADDR(BOOTSTART) |
