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Completed definition of struct int13_cdrom_specification, and moved to 

int13.h.
pull/1/head
Michael Brown 2007-07-19 11:15:01 +01:00
parent 013d381e3c
commit 0d9d2ccbae
2 changed files with 37 additions and 9 deletions
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28
src/arch/i386/include/int13.h
View File

@ -203,6 +203,34 @@ struct int13_disk_parameters {
/** @} */ /** @} */
/** Bootable CD-ROM specification packet */
struct int13_cdrom_specification {
/** Size of packet in bytes */
uint8_t size;
/** Boot media type */
uint8_t media_type;
/** Drive number */
uint8_t drive;
/** CD-ROM controller number */
uint8_t controller;
/** LBA of disk image to emulate */
uint32_t lba;
/** Device specification */
uint16_t device;
/** Segment of 3K buffer for caching CD-ROM reads */
uint16_t cache_segment;
/** Load segment for initial boot image */
uint16_t load_segment;
/** Number of 512-byte sectors to load */
uint16_t load_sectors;
/** Low 8 bits of cylinder number */
uint8_t cyl;
/** Sector number, plus high 2 bits of cylinder number */
uint8_t cyl_sector;
/** Head number */
uint8_t head;
} __attribute__ (( packed ));
/** A C/H/S address within a partition table entry */ /** A C/H/S address within a partition table entry */
struct partition_chs { struct partition_chs {
/** Head number */ /** Head number */

18
src/arch/i386/interface/pcbios/int13.c
View File

@ -317,15 +317,6 @@ static int int13_get_extended_parameters ( struct int13_drive *drive,
return 0; return 0;
} }
struct int13_cdrom_specification {
/** Size of packet in bytes */
uint8_t size;
/** Boot media type */
uint8_t media_type;
/** Drive number */
uint8_t drive;
};
/** /**
* INT 13, 4b - Get CD-ROM status / terminate emulation * INT 13, 4b - Get CD-ROM status / terminate emulation
* *
@ -336,6 +327,9 @@ struct int13_cdrom_specification {
static int int13_cdrom_status_terminate ( struct int13_drive *drive, static int int13_cdrom_status_terminate ( struct int13_drive *drive,
struct i386_all_regs *ix86 ) { struct i386_all_regs *ix86 ) {
struct int13_cdrom_specification specification; struct int13_cdrom_specification specification;
unsigned int max_cylinder = drive->cylinders - 1;
unsigned int max_head = drive->heads - 1;
unsigned int max_sector = drive->sectors_per_track; /* sic */
DBG ( "Get CD-ROM emulation parameters to %04x:%04x\n", DBG ( "Get CD-ROM emulation parameters to %04x:%04x\n",
ix86->segs.ds, ix86->regs.di ); ix86->segs.ds, ix86->regs.di );
@ -343,6 +337,12 @@ static int int13_cdrom_status_terminate ( struct int13_drive *drive,
memset ( &specification, 0, sizeof ( specification ) ); memset ( &specification, 0, sizeof ( specification ) );
specification.size = sizeof ( specification ); specification.size = sizeof ( specification );
specification.drive = drive->drive; specification.drive = drive->drive;
specification.cyl = ( max_cylinder & 0xff );
specification.cyl_sector = ( ( ( max_cylinder >> 8 ) << 6 ) |
max_sector );
specification.head = max_head;
DBG_HD ( &specification, sizeof ( specification ) );
copy_to_real ( ix86->segs.ds, ix86->regs.si, &specification, copy_to_real ( ix86->segs.ds, ix86->regs.si, &specification,
sizeof ( specification ) ); sizeof ( specification ) );