| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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/config.h> |
| 9 | #include <linux/pci.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/tty.h> |
| 12 | #include <linux/console.h> |
| 13 | #include <asm/vga.h> |
| 14 | #include <asm/machvec.h> |
| 15 | |
| 16 | #ifdef CONFIG_VGA_HOSE |
| 17 | |
| 18 | /* |
| 19 | * Externally-visible vga hose bases |
| 20 | */ |
| 21 | unsigned long __vga_hose_io_base = 0; /* base for default hose */ |
| 22 | unsigned long __vga_hose_mem_base = 0; /* base for default hose */ |
| 23 | |
| 24 | static struct pci_controller * __init |
| 25 | default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2) |
| 26 | { |
| 27 | if (h2->index < h1->index) |
| 28 | return h2; |
| 29 | |
| 30 | return h1; |
| 31 | } |
| 32 | |
| 33 | void __init |
| 34 | set_vga_hose(struct pci_controller *hose) |
| 35 | { |
| 36 | if (hose) { |
| 37 | __vga_hose_io_base = hose->io_space->start; |
| 38 | __vga_hose_mem_base = hose->mem_space->start; |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | void __init |
| 43 | locate_and_init_vga(void *(*sel_func)(void *, void *)) |
| 44 | { |
| 45 | struct pci_controller *hose = NULL; |
| 46 | struct pci_dev *dev = NULL; |
| 47 | |
| 48 | if (!sel_func) sel_func = (void *)default_vga_hose_select; |
| 49 | |
| 50 | for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) { |
| 51 | if (!hose) hose = dev->sysdata; |
| 52 | else hose = sel_func(hose, dev->sysdata); |
| 53 | } |
| 54 | |
| 55 | /* Did we already inititialize the correct one? */ |
| 56 | if (conswitchp == &vga_con && |
| 57 | __vga_hose_io_base == hose->io_space->start && |
| 58 | __vga_hose_mem_base == hose->mem_space->start) |
| 59 | return; |
| 60 | |
| 61 | /* Set the VGA hose and init the new console */ |
| 62 | set_vga_hose(hose); |
| 63 | take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); |
| 64 | } |
| 65 | |
| 66 | #endif |