Created a bus/device API that allows for the ROM prefix to specify an

initial device, and will also allow for e.g. a device menu to be presented
to the user.

src/arch/i386/prefix/select_isapnp.c

@@ -1,3 +1,4 @@
+#include "dev.h"
 #include "isapnp.h"
 #include "registers.h"
 
@@ -16,5 +17,16 @@ void i386_select_isapnp_device ( struct i386_all_regs *regs ) {
 	 * address in %dx.
 	 *
 	 */
-	select_isapnp_device ( regs->dx, regs->bx );
+	union {
+		struct bus_loc bus_loc;
+		struct isapnp_loc isapnp_loc;
+	} u;
+
+	/* Set ISAPnP read port */
+	isapnp_set_read_port ( regs->dx );
+	
+	/* Select ISAPnP bus and specified CSN as first boot device */
+	memset ( &u, 0, sizeof ( u ) );
+	u.isapnp_loc.csn = regs->bx;
+	select_device ( &dev, &isapnp_driver, &u.bus_loc );
 }

src/arch/i386/prefix/select_pci.c

@@ -1,3 +1,4 @@
+#include "dev.h"
 #include "pci.h"
 #include "registers.h"
 
@@ -15,5 +16,13 @@ void i386_select_pci_device ( struct i386_all_regs *regs ) {
 	 * PCI BIOS passes busdevfn in %ax
 	 *
 	 */
-	select_pci_device ( regs->ax );
+	union {
+		struct bus_loc bus_loc;
+		struct pci_loc pci_loc;
+	} u;
+	
+	/* Select PCI bus and specified busdevfn as first boot device */
+	memset ( &u, 0, sizeof ( u ) );
+	u.pci_loc.busdevfn = regs->ax;
+	select_device ( &dev, &pci_driver, &u.bus_loc );
 }

src/arch/i386/scripts/i386.lds

@@ -142,9 +142,15 @@ SECTIONS {
 	*(.data.*)
 
 	/* Various tables */
-	boot_drivers = .;
-	*(.boot_drivers)
-	boot_drivers_end = .;
+	device_drivers = .;
+	*(.drivers.device)
+	device_drivers_end = .;
+	bus_drivers = .;
+	*(.drivers.bus)
+	bus_drivers_end = .;
+	type_drivers = .;
+	*(.drivers.type)
+	type_drivers_end = .;
 	console_drivers = .;
 	*(.drivers.console)
 	console_drivers_end = .;