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