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| author | Alexander Bigga <ab@mycable.de> | 2006-12-21 11:25:19 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-02-06 16:53:24 +0000 |
| commit | fd046eb5378f2bc59851fcbc91957d01529fc3db (patch) | |
| tree | 14ab3873686a7c0933757b26505835f43cf6351a /include/asm-mips | |
| parent | 37f26742437df885ddd72150ab352d0a931cd3a7 (diff) | |
| download | linux-fd046eb5378f2bc59851fcbc91957d01529fc3db.tar.gz linux-fd046eb5378f2bc59851fcbc91957d01529fc3db.tar.bz2 linux-fd046eb5378f2bc59851fcbc91957d01529fc3db.zip | |
[MIPS] Alchemy: Fix PCI-memory access
The problem was introduced in 2.6.18.3 with the casting of some
36bit-defines (PCI memory) in au1000.h to resource_size_t which may be
u32 or u64 depending on the experimental CONFIG_RESOURCES_64BIT.
With unset CONFIG_RESOURCES_64BIT, the pci-memory cannot be accessed
because the ioremap in arch/mips/au1000/common/pci.c already used the
truncated addresses.
With set CONFIG_RESOURCES_64BIT, things get even worse, because PCI-scan
aborts, due to resource conflict: request_resource() in arch/mips/pci/pci.c
fails because the maximum iomem-address is 0xffffffff (32bit) but the
pci-memory-start-address is 0x440000000 (36bit).
To get pci working again, I propose the following patch:
1. remove the resource_size_t-casting from au1000.h again
2. make the casting in arch/mips/au1000/common/pci.c (it's allowed and
necessary here. The 36bit-handling will be done in __fixup_bigphys_addr).
With this patch pci works again like in 2.6.18.2, the gcc-compile warnings
in pci.c are gone and it doesn't depend on CONFIG_EXPERIMENTAL.
Signed-off-by: Alexander Bigga <ab@mycable.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/mach-au1x00/au1000.h | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/include/asm-mips/mach-au1x00/au1000.h b/include/asm-mips/mach-au1x00/au1000.h index 43beeaa77b10..58fca8a5a9a6 100644 --- a/include/asm-mips/mach-au1x00/au1000.h +++ b/include/asm-mips/mach-au1x00/au1000.h @@ -1665,12 +1665,12 @@ extern au1xxx_irq_map_t au1xxx_irq_map[]; * addresses. For PCI IO, it's simpler because we get to do the ioremap * ourselves and then adjust the device's resources. */ -#define Au1500_EXT_CFG ((resource_size_t) 0x600000000ULL) -#define Au1500_EXT_CFG_TYPE1 ((resource_size_t) 0x680000000ULL) -#define Au1500_PCI_IO_START ((resource_size_t) 0x500000000ULL) -#define Au1500_PCI_IO_END ((resource_size_t) 0x5000FFFFFULL) -#define Au1500_PCI_MEM_START ((resource_size_t) 0x440000000ULL) -#define Au1500_PCI_MEM_END ((resource_size_t) 0x44FFFFFFFULL) +#define Au1500_EXT_CFG 0x600000000ULL +#define Au1500_EXT_CFG_TYPE1 0x680000000ULL +#define Au1500_PCI_IO_START 0x500000000ULL +#define Au1500_PCI_IO_END 0x5000FFFFFULL +#define Au1500_PCI_MEM_START 0x440000000ULL +#define Au1500_PCI_MEM_END 0x44FFFFFFFULL #define PCI_IO_START (Au1500_PCI_IO_START + 0x1000) #define PCI_IO_END (Au1500_PCI_IO_END) |