Messages in this thread |  | | Date | Thu, 7 Jul 2011 11:13:26 +0400 | | Subject | Re: [PATCH 1/6 v8] ARM: Add basic architecture support for VIA/WonderMedia 85xx SoC's | | From | Alexey Charkov <> |
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2011/7/6 Russell King - ARM Linux <linux@arm.linux.org.uk>: > On Sun, Dec 19, 2010 at 08:40:17PM +0300, Alexey Charkov wrote: >> +static struct map_desc vt8500_io_desc[] __initdata = { >> + /* SoC MMIO registers, to be filled in later */ >> + [0] = { >> + .type = MT_DEVICE >> + }, >> + /* PCI I/O space, numbers tied to those in <mach/io.h> */ >> + [1] = { >> + .virtual = 0xf0000000, >> + .pfn = __phys_to_pfn(0xc0000000), >> + .length = SZ_64K, >> + .type = MT_DEVICE >> + }, >> +}; > ... >> diff --git a/arch/arm/mach-vt8500/include/mach/io.h b/arch/arm/mach-vt8500/include/mach/io.h >> new file mode 100644 >> index 0000000..8dd55c8 >> --- /dev/null >> +++ b/arch/arm/mach-vt8500/include/mach/io.h >> +#ifndef __ASM_ARM_ARCH_IO_H >> +#define __ASM_ARM_ARCH_IO_H >> + >> +#define IO_SPACE_LIMIT 0xffff >> + >> +#define __io(a) ((void __iomem *)((a) + 0xf0000000)) >> +#define __mem_pci(a) (a) > > Can you explain why you seem to have PCI IO space, yet don't have CONFIG_PCI > selected? Do you have any drivers which use this space without CONFIG_PCI=y?
We have not yet created support for the PCI bridge (or even verified its existence on the chip). These numbers are derived bit by bit from vendor-published kernel sources and rather intended as a reference in case somebody wishes to try and implement PCI support.
All the peripherals on these chips that I know of are statically mapped platform devices programmed via MMIO registers. There may be some boards which have support for external PCI devices, but I haven't seen them.
Best, Alexey -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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