1/* 2 * linux/arch/alpha/kernel/console.c 3 * 4 * Architecture-specific specific support for VGA device on 5 * non-0 I/O hose 6 */ 7 8#include <linux/pci.h> 9#include <linux/init.h> 10#include <linux/tty.h> 11#include <linux/console.h> 12#include <linux/vt.h> 13#include <asm/vga.h> 14#include <asm/machvec.h> 15 16#include "pci_impl.h" 17 18#ifdef CONFIG_VGA_HOSE 19 20struct pci_controller *pci_vga_hose; 21static struct resource alpha_vga = { 22 .name = "alpha-vga+", 23 .start = 0x3C0, 24 .end = 0x3DF 25}; 26 27static struct pci_controller * __init 28default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2) 29{ 30 if (h2->index < h1->index) 31 return h2; 32 33 return h1; 34} 35 36void __init 37locate_and_init_vga(void *(*sel_func)(void *, void *)) 38{ 39 struct pci_controller *hose = NULL; 40 struct pci_dev *dev = NULL; 41 42 /* Default the select function */ 43 if (!sel_func) sel_func = (void *)default_vga_hose_select; 44 45 /* Find the console VGA device */ 46 for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) { 47 if (!hose) 48 hose = dev->sysdata; 49 else 50 hose = sel_func(hose, dev->sysdata); 51 } 52 53 /* Did we already initialize the correct one? Is there one? */ 54 if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose)) 55 return; 56 57 /* Create a new VGA ioport resource WRT the hose it is on. */ 58 alpha_vga.start += hose->io_space->start; 59 alpha_vga.end += hose->io_space->start; 60 request_resource(hose->io_space, &alpha_vga); 61 62 /* Set the VGA hose and init the new console. */ 63 pci_vga_hose = hose; 64 take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); 65} 66 67void __init 68find_console_vga_hose(void) 69{ 70 u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset); 71 72 if (pu64[7] == 3) { /* TERM_TYPE == graphics */ 73 struct pci_controller *hose; 74 int h = (pu64[30] >> 24) & 0xff; /* console hose # */ 75 76 /* 77 * Our hose numbering DOES match the console's, so find 78 * the right one... 79 */ 80 for (hose = hose_head; hose; hose = hose->next) { 81 if (hose->index == h) break; 82 } 83 84 if (hose) { 85 printk("Console graphics on hose %d\n", h); 86 pci_vga_hose = hose; 87 } 88 } 89} 90 91#endif 92