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| author | Hemant Pedanekar <hemantp@ti.com> | 2009-06-24 08:45:47 +0400 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2009-08-26 11:57:01 +0400 |
| commit | 9eb7115bcc423ae022ebf1844820d58a77c2d435 (patch) | |
| tree | 02d47e10e7f3c8c45f147b296ecfcec872f49f41 /arch/arm/mach-davinci/include/mach/hardware.h | |
| parent | 3e25d5f4fd7515a0a1e6b68025c483f53196a98c (diff) | |
| download | linux-9eb7115bcc423ae022ebf1844820d58a77c2d435.tar.xz | |
davinci: Move IO device mapping macros from io.h to hardware.h
This patch takes out IO mapping macros from mach/io.h and puts them in
mach/hardware.h avoiding need to include mach/io.h in various files such as
serial.h, vmalloc.h etc.
The main reason to avoid inclusion of mach/io.h is, when default in/out macros
are overridden by machine specific functions (e.g., in case of PCI I/O), they
result into linker error. An example snippet and error snapshot is listed below.
Following code in mach/io.h:
#define inl(p) my_inl()
static inline unsigned int my_inl(unsigned int addr)
{
if (IS_PCI_IO(addr))
return pci_inl ();
else
return le32_to_cpu(__raw_readl(__typesafe_io(addr)));
}
leads to error:
LD arch/arm/boot/compressed/vmlinux
arch/arm/boot/compressed/misc.o: In function `my_inl':
misc.c:(.text+0x2744): undefined reference to `pci_inl'
make[2]: *** [arch/arm/boot/compressed/vmlinux] Error 1
This is because mach/io.h gets included in arch/arm/boot/compressed/misc.c
through mach/serial.h but pci.c file, which defines 'pci_inl' doesn't get built
into compressed vmlinux.
Signed-off-by: Hemant Pedanekar <hemantp@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/include/mach/hardware.h')
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/hardware.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/include/mach/hardware.h b/arch/arm/mach-davinci/include/mach/hardware.h index 48c77934d519..41c89386e39b 100644 --- a/arch/arm/mach-davinci/include/mach/hardware.h +++ b/arch/arm/mach-davinci/include/mach/hardware.h @@ -24,4 +24,21 @@ /* System control register offsets */ #define DM64XX_VDD3P3V_PWDN 0x48 +/* + * I/O mapping + */ +#define IO_PHYS 0x01c00000 +#define IO_OFFSET 0xfd000000 /* Virtual IO = 0xfec00000 */ +#define IO_SIZE 0x00400000 +#define IO_VIRT (IO_PHYS + IO_OFFSET) +#define io_v2p(va) ((va) - IO_OFFSET) +#define __IO_ADDRESS(x) ((x) + IO_OFFSET) +#define IO_ADDRESS(pa) IOMEM(__IO_ADDRESS(pa)) + +#ifdef __ASSEMBLER__ +#define IOMEM(x) x +#else +#define IOMEM(x) ((void __force __iomem *)(x)) +#endif + #endif /* __ASM_ARCH_HARDWARE_H */ |