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[int13] Allow drive to be hooked using the natural drive number 

Interpret the maximum drive number (0xff for hard disks, 0x7f for
floppy disks) as meaning "use natural drive number".

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/51/head
Michael Brown 2016-03-20 09:16:13 +00:00
parent 311a5732c8
commit ab5b3abbba
3 changed files with 13 additions and 7 deletions
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8
src/arch/x86/interface/pcbios/int13.c
View File

@ -1588,7 +1588,7 @@ static void int13_free ( struct refcnt *refcnt ) {
* *
* @v uri URI * @v uri URI
* @v drive Drive number * @v drive Drive number
* @ret rc Return status code * @ret drive Drive number, or negative error
* *
* Registers the drive with the INT 13 emulation subsystem, and hooks * Registers the drive with the INT 13 emulation subsystem, and hooks
* the INT 13 interrupt vector (if not already hooked). * the INT 13 interrupt vector (if not already hooked).
@ -1603,6 +1603,10 @@ static int int13_hook ( struct uri *uri, unsigned int drive ) {
int13_sync_num_drives(); int13_sync_num_drives();
natural_drive = ( ( drive & 0x80 ) ? ( num_drives | 0x80 ) : num_fdds ); natural_drive = ( ( drive & 0x80 ) ? ( num_drives | 0x80 ) : num_fdds );
/* Use natural drive number if directed to do so */
if ( ( drive & 0x7f ) == 0x7f )
drive = natural_drive;
/* Check that drive number is not in use */ /* Check that drive number is not in use */
list_for_each_entry ( int13, &int13s, list ) { list_for_each_entry ( int13, &int13s, list ) {
if ( int13->drive == drive ) { if ( int13->drive == drive ) {
@ -1661,7 +1665,7 @@ static int int13_hook ( struct uri *uri, unsigned int drive ) {
int13_sync_num_drives(); int13_sync_num_drives();
free ( scratch ); free ( scratch );
return 0; return drive;
err_guess_geometry: err_guess_geometry:
err_parse_iso9660: err_parse_iso9660:

2
src/include/ipxe/sanboot.h
View File

@ -70,7 +70,7 @@ unsigned int san_default_drive ( void );
* *
* @v uri URI * @v uri URI
* @v drive Drive number * @v drive Drive number
* @ret rc Return status code * @ret drive Drive number, or negative error
*/ */
int san_hook ( struct uri *uri, unsigned int drive ); int san_hook ( struct uri *uri, unsigned int drive );

10
src/usr/autoboot.c
View File

@ -127,7 +127,9 @@ int uriboot ( struct uri *filename, struct uri *root_path, int drive,
/* Hook SAN device, if applicable */ /* Hook SAN device, if applicable */
if ( root_path ) { if ( root_path ) {
if ( ( rc = san_hook ( root_path, drive ) ) != 0 ) { drive = san_hook ( root_path, drive );
if ( drive < 0 ) {
rc = drive;
printf ( "Could not open SAN device: %s\n", printf ( "Could not open SAN device: %s\n",
strerror ( rc ) ); strerror ( rc ) );
goto err_san_hook; goto err_san_hook;
@ -136,7 +138,7 @@ int uriboot ( struct uri *filename, struct uri *root_path, int drive,
} }
/* Describe SAN device, if applicable */ /* Describe SAN device, if applicable */
if ( ( drive >= 0 ) && ! ( flags & URIBOOT_NO_SAN_DESCRIBE ) ) { if ( ! ( flags & URIBOOT_NO_SAN_DESCRIBE ) ) {
if ( ( rc = san_describe ( drive ) ) != 0 ) { if ( ( rc = san_describe ( drive ) ) != 0 ) {
printf ( "Could not describe SAN device %#02x: %s\n", printf ( "Could not describe SAN device %#02x: %s\n",
drive, strerror ( rc ) ); drive, strerror ( rc ) );
@ -170,7 +172,7 @@ int uriboot ( struct uri *filename, struct uri *root_path, int drive,
} }
/* Attempt SAN boot if applicable */ /* Attempt SAN boot if applicable */
if ( ( drive >= 0 ) && ! ( flags & URIBOOT_NO_SAN_BOOT ) ) { if ( ! ( flags & URIBOOT_NO_SAN_BOOT ) ) {
if ( fetch_intz_setting ( NULL, &skip_san_boot_setting) == 0 ) { if ( fetch_intz_setting ( NULL, &skip_san_boot_setting) == 0 ) {
printf ( "Booting from SAN device %#02x\n", drive ); printf ( "Booting from SAN device %#02x\n", drive );
rc = san_boot ( drive ); rc = san_boot ( drive );
@ -188,7 +190,7 @@ int uriboot ( struct uri *filename, struct uri *root_path, int drive,
err_download: err_download:
err_san_describe: err_san_describe:
/* Unhook SAN device, if applicable */ /* Unhook SAN device, if applicable */
if ( ( drive >= 0 ) && ! ( flags & URIBOOT_NO_SAN_UNHOOK ) ) { if ( ! ( flags & URIBOOT_NO_SAN_UNHOOK ) ) {
if ( fetch_intz_setting ( NULL, &keep_san_setting ) == 0 ) { if ( fetch_intz_setting ( NULL, &keep_san_setting ) == 0 ) {
san_unhook ( drive ); san_unhook ( drive );
printf ( "Unregistered SAN device %#02x\n", drive ); printf ( "Unregistered SAN device %#02x\n", drive );