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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2007-05-08 02:27:29 -0400
committerPaul Mackerras <paulus@samba.org>2007-05-09 02:35:00 -0400
commitf1fa74f4afe96b0e4ac2beaa61fa4f4667acdcbb (patch)
tree287c3b73db9d871565b453c91b0a00559300306b /include/asm-powerpc
parent16c2d476232523260c495eafbf9cdc1be984b7df (diff)
[POWERPC] Spufs support for 64K LS mappings on 4K kernels
This adds an option to spufs when the kernel is configured for 4K page to give it the ability to use 64K pages for SPE local store mappings. Currently, we are optimistic and try order 4 allocations when creating contexts. If that fails, the code will fallback to 4K automatically. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/spu_csa.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/asm-powerpc/spu_csa.h b/include/asm-powerpc/spu_csa.h
index 02e56a6685a2..c48ae185c874 100644
--- a/include/asm-powerpc/spu_csa.h
+++ b/include/asm-powerpc/spu_csa.h
@@ -235,6 +235,12 @@ struct spu_priv2_collapsed {
235 */ 235 */
236struct spu_state { 236struct spu_state {
237 struct spu_lscsa *lscsa; 237 struct spu_lscsa *lscsa;
238#ifdef CONFIG_SPU_FS_64K_LS
239 int use_big_pages;
240 /* One struct page per 64k page */
241#define SPU_LSCSA_NUM_BIG_PAGES (sizeof(struct spu_lscsa) / 0x10000)
242 struct page *lscsa_pages[SPU_LSCSA_NUM_BIG_PAGES];
243#endif
238 struct spu_problem_collapsed prob; 244 struct spu_problem_collapsed prob;
239 struct spu_priv1_collapsed priv1; 245 struct spu_priv1_collapsed priv1;
240 struct spu_priv2_collapsed priv2; 246 struct spu_priv2_collapsed priv2;
@@ -247,12 +253,14 @@ struct spu_state {
247 spinlock_t register_lock; 253 spinlock_t register_lock;
248}; 254};
249 255
250extern void spu_init_csa(struct spu_state *csa); 256extern int spu_init_csa(struct spu_state *csa);
251extern void spu_fini_csa(struct spu_state *csa); 257extern void spu_fini_csa(struct spu_state *csa);
252extern int spu_save(struct spu_state *prev, struct spu *spu); 258extern int spu_save(struct spu_state *prev, struct spu *spu);
253extern int spu_restore(struct spu_state *new, struct spu *spu); 259extern int spu_restore(struct spu_state *new, struct spu *spu);
254extern int spu_switch(struct spu_state *prev, struct spu_state *new, 260extern int spu_switch(struct spu_state *prev, struct spu_state *new,
255 struct spu *spu); 261 struct spu *spu);
262extern int spu_alloc_lscsa(struct spu_state *csa);
263extern void spu_free_lscsa(struct spu_state *csa);
256 264
257#endif /* !__SPU__ */ 265#endif /* !__SPU__ */
258#endif /* __KERNEL__ */ 266#endif /* __KERNEL__ */