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author | Jay Estabrook <jay.estabrook@hp.com> | 2007-06-01 00:47:03 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-01 08:18:29 -0700 |
commit | 025a22151c41890e5d30a1d4fb84c547b84d7671 (patch) | |
tree | 9effd8ca9ceed994a03d252d4a1d28fa07ae93a1 /include | |
parent | 8778beb981b7e5df3472b05475e4c7905dad1f3d (diff) | |
download | linux-025a22151c41890e5d30a1d4fb84c547b84d7671.tar.gz linux-025a22151c41890e5d30a1d4fb84c547b84d7671.tar.bz2 linux-025a22151c41890e5d30a1d4fb84c547b84d7671.zip |
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 'include')
-rw-r--r-- | include/asm-alpha/core_titan.h | 7 | ||||
-rw-r--r-- | include/asm-alpha/core_tsunami.h | 15 | ||||
-rw-r--r-- | include/asm-alpha/vga.h | 31 |
3 files changed, 35 insertions, 18 deletions
diff --git a/include/asm-alpha/core_titan.h b/include/asm-alpha/core_titan.h index a64ccbff7d98..a17f6f33b68e 100644 --- a/include/asm-alpha/core_titan.h +++ b/include/asm-alpha/core_titan.h @@ -380,12 +380,7 @@ struct el_PRIVATEER_envdata_mcheck { /* * Memory functions. all accesses are done through linear space. */ - -__EXTERN_INLINE void __iomem *titan_ioportmap(unsigned long addr) -{ - return (void __iomem *)(addr + TITAN_IO_BIAS); -} - +extern void __iomem *titan_ioportmap(unsigned long addr); extern void __iomem *titan_ioremap(unsigned long addr, unsigned long size); extern void titan_iounmap(volatile void __iomem *addr); diff --git a/include/asm-alpha/core_tsunami.h b/include/asm-alpha/core_tsunami.h index 44e635d2c571..58d4fe48742c 100644 --- a/include/asm-alpha/core_tsunami.h +++ b/include/asm-alpha/core_tsunami.h @@ -2,6 +2,7 @@ #define __ALPHA_TSUNAMI__H__ #include <linux/types.h> +#include <linux/pci.h> #include <asm/compiler.h> /* @@ -302,18 +303,8 @@ struct el_TSUNAMI_sysdata_mcheck { /* * Memory functions. all accesses are done through linear space. */ - -__EXTERN_INLINE void __iomem *tsunami_ioportmap(unsigned long addr) -{ - return (void __iomem *)(addr + TSUNAMI_IO_BIAS); -} - -__EXTERN_INLINE void __iomem *tsunami_ioremap(unsigned long addr, - unsigned long size) -{ - return (void __iomem *)(addr + TSUNAMI_MEM_BIAS); -} - +extern void __iomem *tsunami_ioportmap(unsigned long addr); +extern void __iomem *tsunami_ioremap(unsigned long addr, unsigned long size); __EXTERN_INLINE int tsunami_is_ioaddr(unsigned long addr) { return addr >= TSUNAMI_BASE; diff --git a/include/asm-alpha/vga.h b/include/asm-alpha/vga.h index ed06f59b544d..e8df1e7aae6b 100644 --- a/include/asm-alpha/vga.h +++ b/include/asm-alpha/vga.h @@ -46,6 +46,37 @@ extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count); #define vga_readb(a) readb((u8 __iomem *)(a)) #define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a)) +#ifdef CONFIG_VGA_HOSE +#include <linux/ioport.h> +#include <linux/pci.h> + +extern struct pci_controller *pci_vga_hose; + +# define __is_port_vga(a) \ + (((a) >= 0x3b0) && ((a) < 0x3e0) && \ + ((a) != 0x3b3) && ((a) != 0x3d3)) + +# define __is_mem_vga(a) \ + (((a) >= 0xa0000) && ((a) <= 0xc0000)) + +# define FIXUP_IOADDR_VGA(a) do { \ + if (pci_vga_hose && __is_port_vga(a)) \ + (a) += pci_vga_hose->io_space->start; \ + } while(0) + +# define FIXUP_MEMADDR_VGA(a) do { \ + if (pci_vga_hose && __is_mem_vga(a)) \ + (a) += pci_vga_hose->mem_space->start; \ + } while(0) + +#else /* CONFIG_VGA_HOSE */ +# define pci_vga_hose 0 +# define __is_port_vga(a) 0 +# define __is_mem_vga(a) 0 +# define FIXUP_IOADDR_VGA(a) +# define FIXUP_MEMADDR_VGA(a) +#endif /* CONFIG_VGA_HOSE */ + #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s)) #endif |