diff options
| author | Kumar Gala <galak@freescale.com> | 2005-04-16 15:24:22 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:24:22 -0700 |
| commit | f50b153b1966230e78034d5ab1641ca4bb5db56d (patch) | |
| tree | 9f3f0971789ca2cbb59efbd694c172804f4547cd /arch/ppc/syslib | |
| parent | b464fce5edc08a825907e9d48a2d2f1af0393fef (diff) | |
[PATCH] ppc32: Support 36-bit physical addressing on e500
To add support for 36-bit physical addressing on e500 the following changes
have been made. The changes are generalized to support any physical address
size larger than 32-bits:
* Allow FSL Book-E parts to use a 64-bit PTE, it is 44-bits of pfn, 20-bits
of flags.
* Introduced new CPU feature (CPU_FTR_BIG_PHYS) to allow runtime handling of
updating hardware register (SPRN_MAS7) which holds the upper 32-bits of
physical address that will be written into the TLB. This is useful since
not all e500 cores support 36-bit physical addressing.
* Currently have a pass through implementation of fixup_bigphys_addr
* Moved _PAGE_DIRTY in the 64-bit PTE case to free room for three additional
storage attributes that may exist in future FSL Book-E cores and updated
fault handler to copy these bits into the hardware TLBs.
Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/ppc/syslib')
| -rw-r--r-- | arch/ppc/syslib/ppc85xx_common.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/ppc/syslib/ppc85xx_common.c b/arch/ppc/syslib/ppc85xx_common.c index e83f2f8686d..da841dacdc1 100644 --- a/arch/ppc/syslib/ppc85xx_common.c +++ b/arch/ppc/syslib/ppc85xx_common.c @@ -31,3 +31,11 @@ get_ccsrbar(void) } EXPORT_SYMBOL(get_ccsrbar); + +/* For now this is a pass through */ +phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size) +{ + return addr; +}; +EXPORT_SYMBOL(fixup_bigphys_addr); + |