/* *	linux/arch/alpha/kernel/console.c * * Architecture-specific specific support for VGA device on  * non-0 I/O hose */ #include <linux/config.h>#include <linux/pci.h>#include <linux/init.h>#include <linux/tty.h>#include <linux/console.h>#include <asm/vga.h>#include <asm/machvec.h> #ifdef CONFIG_VGA_HOSE /* * Externally-visible vga hose bases */unsigned long __vga_hose_io_base = 0;	/* base for default hose */unsigned long __vga_hose_mem_base = 0;	/* base for default hose */ static struct pci_controller * __init default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2){	if (h2->index < h1->index)		return h2; 	return h1;} void __init set_vga_hose(struct pci_controller *hose){	if (hose) {		__vga_hose_io_base = hose->io_space->start;		__vga_hose_mem_base = hose->mem_space->start;	}} void __init locate_and_init_vga(void *(*sel_func)(void *, void *)){	struct pci_controller *hose = NULL;	struct pci_dev *dev = NULL; 	if (!sel_func) sel_func = (void *)default_vga_hose_select; 	for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) {		if (!hose) hose = dev->sysdata;		else hose = sel_func(hose, dev->sysdata);	} 	/* Did we already inititialize the correct one? */	if (conswitchp == &vga_con &&	    __vga_hose_io_base == hose->io_space->start &&	    __vga_hose_mem_base == hose->mem_space->start)		return; 	/* Set the VGA hose and init the new console */	set_vga_hose(hose);	take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);} #endif