diff options
| author | Jay Estabrook <jay.estabrook@hp.com> | 2007-06-01 00:47:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-01 08:18:29 -0700 |
| commit | 025a22151c41890e5d30a1d4fb84c547b84d7671 (patch) | |
| tree | 9effd8ca9ceed994a03d252d4a1d28fa07ae93a1 /arch/alpha/kernel/core_tsunami.c | |
| parent | 8778beb981b7e5df3472b05475e4c7905dad1f3d (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.c | 24 |
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 |