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authorJay Estabrook <jay.estabrook@hp.com>2007-06-01 00:47:03 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-01 08:18:29 -0700
commit025a22151c41890e5d30a1d4fb84c547b84d7671 (patch)
tree9effd8ca9ceed994a03d252d4a1d28fa07ae93a1 /arch/alpha/kernel/proto.h
parent8778beb981b7e5df3472b05475e4c7905dad1f3d (diff)
downloadlinux-2.6.34-ux500-025a22151c41890e5d30a1d4fb84c547b84d7671.tar.gz
ALPHA: support graphics on non-zero PCI domains
This code replaces earlier and incomplete handling of graphics on non-zero PCI domains (aka hoses or peer PCI buses). An option (CONFIG_VGA_HOSE) is set TRUE if configuring a GENERIC kernel, or a kernel for MARVEL, TITAN, or TSUNAMI machines, as these are the machines whose SRM consoles are capable of configuring and handling graphics options on non-zero hoses. All other machines have the option set FALSE. A routine, "find_console_vga_hose()", is used to find the graphics device which the machine's firmware believes is the console device, and it sets a global (pci_vga_hose) for later use in managing access to the device. This is called in "init_arch" on TITAN and TSUNAMI machines; MARVEL machines use a custom version of this routine because of extra complexity. A routine, "locate_and_init_vga()", is used to find the graphics device and set a global (pci_vga_hose) for later use in managing access to the device, in the case where "find_console_vga_hose" has failed. Various adjustments are made to the ioremap and ioportmap routines for detecting and translating "legacy" VGA register and memory references to the real PCI domain. [akpm@linux-foundation.org: don't statically init bss] [akpm@linux-foundation.org: build fix] Signed-off-by: Jay Estabrook <jay.estabrook@hp.com> Signed-off-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/alpha/kernel/proto.h')
-rw-r--r--arch/alpha/kernel/proto.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/alpha/kernel/proto.h b/arch/alpha/kernel/proto.h
index 95912ecc65e..708d5ca8778 100644
--- a/arch/alpha/kernel/proto.h
+++ b/arch/alpha/kernel/proto.h
@@ -108,6 +108,15 @@ extern int wildfire_cpuid_to_nid(int);
extern unsigned long wildfire_node_mem_start(int);
extern unsigned long wildfire_node_mem_size(int);
+/* console.c */
+#ifdef CONFIG_VGA_HOSE
+extern void find_console_vga_hose(void);
+extern void locate_and_init_vga(void *(*)(void *, void *));
+#else
+static inline void find_console_vga_hose(void) { }
+static inline void locate_and_init_vga(void *(*sel_func)(void *, void *)) { }
+#endif
+
/* setup.c */
extern unsigned long srm_hae;
extern int boot_cpuid;