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New device probing mechanism

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This commit is contained in:
Michael Brown
2005-04-12 16:38:23 +00:00
parent 707720c4e5
commit 17c1ca90e7
2 changed files with 83 additions and 107 deletions
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44
src/core/dev.c Normal file
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@@ -0,0 +1,44 @@
#include "etherboot.h"
#include "stddef.h"
#include "dev.h"
/* Defined by linker */
extern struct boot_driver boot_drivers[];
extern struct boot_driver boot_drivers_end[];
/* Current attempted boot driver */
static struct boot_driver *boot_driver = boot_drivers;
/* Current boot device */
struct dev dev;
/* Print all drivers */
void print_drivers ( void ) {
struct boot_driver *driver;
for ( driver = boot_drivers ; driver < boot_drivers_end ; driver++ ) {
printf ( "%s ", driver->name );
}
}
/* Get the next available boot device */
int probe ( struct dev *dev ) {
for ( ; boot_driver < boot_drivers_end ; boot_driver++ ) {
dev->name = "unknown";
if ( boot_driver->probe ( dev ) )
return 1;
}
/* No more boot devices found */
boot_driver = boot_drivers;
return 0;
}
/* Disable a device */
void disable ( struct dev *dev ) {
if ( dev->dev_op ) {
dev->dev_op->disable ( dev );
dev->dev_op = NULL;
}
}