diff options
Diffstat (limited to 'arch/alpha/kernel/console.c')
| -rw-r--r-- | arch/alpha/kernel/console.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/alpha/kernel/console.c b/arch/alpha/kernel/console.c new file mode 100644 index 00000000000..cb3e739fbad --- /dev/null +++ b/arch/alpha/kernel/console.c @@ -0,0 +1,66 @@ +/* + * 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 |