// vfs.c
// Author: Josh Holtrop
// Date: 03/11/04

#include "vfs.h"
#include "hos_defines.h"

Volume *firstVolume = 0;
Volume *rootVolume = 0;

void vfs_init()
{
	if(*(byte *)BOOT_HASRD)	//bootloader loaded an initial ram disk
	{
		Volume *initrd = vfs_newVolume();
		RamDisk *rd = rd_newDisk(0xC0200000, 1440*1024);
		initrd->diskDevice = rd;
		initrd->deviceType = VFS_RD;
		strcpy(initrd->label, "rd0");
		initrd->link = 0;
		rootVolume = initrd;
	}
}


Volume *vfs_newVolume()
{
	Volume *vol = malloc(sizeof(Volume));
	vfs_getLastVolume()->link = vol;
	return vol;
}


Volume *vfs_getLastVolume()
{
	Volume *vol = firstVolume;
	while (vol)
		vol = vol->link;
	return vol;
}