diff options
| author | Ian Munsie <imunsie@au1.ibm.com> | 2014-10-08 12:54:51 +0400 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-10-08 13:14:55 +0400 |
| commit | 73d16a6e0e51990cbe13f8d8f43bd5329bbab30a (patch) | |
| tree | d151865457d0653072ee8dd2fbc23fb84f05fe23 /arch/powerpc/include | |
| parent | e83d01697583d8610d1d62279758c2a881e3396f (diff) | |
| download | linux-73d16a6e0e51990cbe13f8d8f43bd5329bbab30a.tar.xz | |
powerpc/cell: Move data segment faulting code out of cell platform
__spu_trap_data_seg() currently contains code to determine the VSID and ESID
required for a particular EA and mm struct.
This code is generically useful for other co-processors. This moves the code of
the cell platform so it can be used by other powerpc code. It also adds 1TB
segment handling which Cell didn't support. The new function is called
copro_calculate_slb().
This also moves the internal struct spu_slb to a generic struct copro_slb which
is now used in the Cell and copro code. We use this new struct instead of
passing around esid and vsid parameters.
Signed-off-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/copro.h | 7 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/mmu-hash64.h | 7 |
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/copro.h b/arch/powerpc/include/asm/copro.h index 51cae85a50b4..b0e6a183181f 100644 --- a/arch/powerpc/include/asm/copro.h +++ b/arch/powerpc/include/asm/copro.h @@ -10,7 +10,14 @@ #ifndef _ASM_POWERPC_COPRO_H #define _ASM_POWERPC_COPRO_H +struct copro_slb +{ + u64 esid, vsid; +}; + int copro_handle_mm_fault(struct mm_struct *mm, unsigned long ea, unsigned long dsisr, unsigned *flt); +int copro_calculate_slb(struct mm_struct *mm, u64 ea, struct copro_slb *slb); + #endif /* _ASM_POWERPC_COPRO_H */ diff --git a/arch/powerpc/include/asm/mmu-hash64.h b/arch/powerpc/include/asm/mmu-hash64.h index 92bc3a637923..bd813c00ede2 100644 --- a/arch/powerpc/include/asm/mmu-hash64.h +++ b/arch/powerpc/include/asm/mmu-hash64.h @@ -190,6 +190,13 @@ static inline unsigned int mmu_psize_to_shift(unsigned int mmu_psize) #ifndef __ASSEMBLY__ +static inline int slb_vsid_shift(int ssize) +{ + if (ssize == MMU_SEGSIZE_256M) + return SLB_VSID_SHIFT; + return SLB_VSID_SHIFT_1T; +} + static inline int segment_shift(int ssize) { if (ssize == MMU_SEGSIZE_256M) |