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| author |   Greg Kurz <gkurz@linux.vnet.ibm.com> | 2015-02-23 16:14:31 +0100 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2015-03-18 10:48:59 +1100 |
| commit | 4b6cfb2a8cd7520e8a747718e5c1da047697ca31 (patch) | |
| tree | 4c11bb5e691f12eec899ae7350a743920541e96b /arch/powerpc/mm/vphn.h | |
| parent | powerpc/vphn: move endianness fixing to vphn_unpack_associativity() (diff) | |
| download | linux-dev-4b6cfb2a8cd7520e8a747718e5c1da047697ca31.tar.xz linux-dev-4b6cfb2a8cd7520e8a747718e5c1da047697ca31.zip | |
powerpc/vphn: move VPHN parsing logic to a separate file
The goal behind this patch is to be able to write userland tests for the
VPHN parsing code.
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/vphn.h')
| -rw-r--r-- | arch/powerpc/mm/vphn.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/mm/vphn.h b/arch/powerpc/mm/vphn.h new file mode 100644 index 000000000000..96af9a474693 --- /dev/null +++ b/arch/powerpc/mm/vphn.h @@ -0,0 +1,16 @@ +#ifndef _ARCH_POWERPC_MM_VPHN_H_ +#define _ARCH_POWERPC_MM_VPHN_H_ + +/* The H_HOME_NODE_ASSOCIATIVITY h_call returns 6 64-bit registers. + */ +#define VPHN_REGISTER_COUNT 6 + +/* + * 6 64-bit registers unpacked into 12 32-bit associativity values. To form + * the complete property we have to add the length in the first cell. + */ +#define VPHN_ASSOC_BUFSIZE (VPHN_REGISTER_COUNT*sizeof(u64)/sizeof(u32) + 1) + +extern int vphn_unpack_associativity(const long *packed, __be32 *unpacked); + +#endif |