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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/core_tsunami.c
parent8778beb981b7e5df3472b05475e4c7905dad1f3d (diff)
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/core_tsunami.c')
-rw-r--r--arch/alpha/kernel/core_tsunami.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/alpha/kernel/core_tsunami.c b/arch/alpha/kernel/core_tsunami.c
index ce623c6e55e1..ef91e09590d4 100644
--- a/arch/alpha/kernel/core_tsunami.c
+++ b/arch/alpha/kernel/core_tsunami.c
@@ -19,6 +19,7 @@
#include <asm/ptrace.h>
#include <asm/smp.h>
+#include <asm/vga.h>
#include "proto.h"
#include "pci_impl.h"
@@ -349,6 +350,26 @@ tsunami_init_one_pchip(tsunami_pchip *pchip, int index)
tsunami_pci_tbi(hose, 0, -1);
}
+
+void __iomem *
+tsunami_ioportmap(unsigned long addr)
+{
+ FIXUP_IOADDR_VGA(addr);
+ return (void __iomem *)(addr + TSUNAMI_IO_BIAS);
+}
+
+void __iomem *
+tsunami_ioremap(unsigned long addr, unsigned long size)
+{
+ FIXUP_MEMADDR_VGA(addr);
+ return (void __iomem *)(addr + TSUNAMI_MEM_BIAS);
+}
+
+#ifndef CONFIG_ALPHA_GENERIC
+EXPORT_SYMBOL(tsunami_ioportmap);
+EXPORT_SYMBOL(tsunami_ioremap);
+#endif
+
void __init
tsunami_init_arch(void)
{
@@ -393,6 +414,9 @@ tsunami_init_arch(void)
tsunami_init_one_pchip(TSUNAMI_pchip0, 0);
if (TSUNAMI_cchip->csc.csr & 1L<<14)
tsunami_init_one_pchip(TSUNAMI_pchip1, 1);
+
+ /* Check for graphic console location (if any). */
+ find_console_vga_hose();
}
static void