summaryrefslogtreecommitdiff
path: root/arch/alpha/kernel/console.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/alpha/kernel/console.c
downloadconfigs-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/alpha/kernel/console.c')
-rw-r--r--arch/alpha/kernel/console.c66
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