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generic: add phys_addr_t for holding physical addresses

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Add a kernel-wide "phys_addr_t" which is guaranteed to be able to hold
any physical address.  By default it equals the word size of the
architecture, but a 32-bit architecture can set ARCH_PHYS_ADDR_T_64BIT
if it needs a 64-bit phys_addr_t.

Signed-off-by: Jeremy Fitzhardinge <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Jeremy Fitzhardinge 2008-09-11 01:31:45 -07:00 • committed by Ingo Molnar
commit 600715dcdf
7 changed files with 15 additions and 10 deletions
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3
mm/Kconfig
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@ -187,6 +187,9 @@ config RESOURCES_64BIT
help
This option allows memory and IO resources to be 64 bit.
config PHYS_ADDR_T_64BIT
def_bool 64BIT || ARCH_PHYS_ADDR_T_64BIT
config ZONE_DMA_FLAG
int
default "0" if !ZONE_DMA