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| author | Jeremy Kerr <jk@ozlabs.org> | 2007-12-05 05:49:31 +0300 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2007-12-19 03:00:05 +0300 |
| commit | 684bd614015188561197342fd336292e9e2ce196 (patch) | |
| tree | 89307cd386307b6bdfa9c65165a8d0fc95eb77d5 /arch/powerpc/platforms/cell/spufs/switch.c | |
| parent | f6eb7d7ffef3e2fa40b0161c30486cb87203758d (diff) | |
| download | linux-684bd614015188561197342fd336292e9e2ce196.tar.xz | |
[POWERPC] cell: handle SPE kernel mappings that cross segment boundaries
Currently, we have a possibilty that the SLBs setup during context
switch don't cover the entirety of the necessary lscsa and code
regions, if these regions cross a segment boundary.
This change checks the start and end of each region, and inserts a SLB
entry for each, if unique. We also remove the assumption that the
spu_save_code and spu_restore_code reside in the same segment, by using
the specific code array for save and restore.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/powerpc/platforms/cell/spufs/switch.c')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/switch.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c index 96f55148a408..8cbc6574820f 100644 --- a/arch/powerpc/platforms/cell/spufs/switch.c +++ b/arch/powerpc/platforms/cell/spufs/switch.c @@ -691,7 +691,8 @@ static inline void resume_mfc_queue(struct spu_state *csa, struct spu *spu) out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESUME_DMA_QUEUE); } -static inline void setup_mfc_slbs(struct spu_state *csa, struct spu *spu) +static inline void setup_mfc_slbs(struct spu_state *csa, struct spu *spu, + unsigned int *code, int code_size) { /* Save, Step 47: * Restore, Step 30. @@ -708,7 +709,7 @@ static inline void setup_mfc_slbs(struct spu_state *csa, struct spu *spu) * translation is desired by OS environment). */ spu_invalidate_slbs(spu); - spu_setup_kernel_slbs(spu, csa->lscsa, &spu_save_code); + spu_setup_kernel_slbs(spu, csa->lscsa, code, code_size); } static inline void set_switch_active(struct spu_state *csa, struct spu *spu) @@ -1835,7 +1836,8 @@ static void save_lscsa(struct spu_state *prev, struct spu *spu) */ resume_mfc_queue(prev, spu); /* Step 46. */ - setup_mfc_slbs(prev, spu); /* Step 47. */ + /* Step 47. */ + setup_mfc_slbs(prev, spu, spu_save_code, sizeof(spu_save_code)); set_switch_active(prev, spu); /* Step 48. */ enable_interrupts(prev, spu); /* Step 49. */ save_ls_16kb(prev, spu); /* Step 50. */ @@ -1940,7 +1942,8 @@ static void restore_lscsa(struct spu_state *next, struct spu *spu) setup_spu_status_part1(next, spu); /* Step 27. */ setup_spu_status_part2(next, spu); /* Step 28. */ restore_mfc_rag(next, spu); /* Step 29. */ - setup_mfc_slbs(next, spu); /* Step 30. */ + /* Step 30. */ + setup_mfc_slbs(next, spu, spu_restore_code, sizeof(spu_restore_code)); set_spu_npc(next, spu); /* Step 31. */ set_signot1(next, spu); /* Step 32. */ set_signot2(next, spu); /* Step 33. */ |