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authorArnd Bergmann <arnd@arndb.de>2005-11-15 15:53:52 -0500
committerPaul Mackerras <paulus@samba.org>2006-01-09 14:49:30 +1100
commit8b3d6663c6217e4f50cc3720935a96da9b984117 (patch)
tree5295c29787ac66c26ddf715868fda7fcd3ad5f97 /include/asm-powerpc/spu_csa.h
parent05b841174c289ca62a6b42d883b8791d9ac3a4bd (diff)
[PATCH] spufs: cooperative scheduler support
This adds a scheduler for SPUs to make it possible to use more logical SPUs than physical ones are present in the system. Currently, there is no support for preempting a running SPU thread, they have to leave the SPU by either triggering an event on the SPU that causes it to return to the owning thread or by sending a signal to it. This patch also adds operations that enable accessing an SPU in either runnable or saved state. We use an RW semaphore to protect the state of the SPU from changing underneath us, while we are holding it readable. In order to change the state, it is acquired writeable and a context save or restore is executed before downgrading the semaphore to read-only. From: Mark Nutter <mnutter@us.ibm.com>, Uli Weigand <Ulrich.Weigand@de.ibm.com> Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-powerpc/spu_csa.h')
-rw-r--r--include/asm-powerpc/spu_csa.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-powerpc/spu_csa.h b/include/asm-powerpc/spu_csa.h
index 989a0688144..2a8af416638 100644
--- a/include/asm-powerpc/spu_csa.h
+++ b/include/asm-powerpc/spu_csa.h
@@ -241,6 +241,7 @@ struct spu_state {
unsigned long suspend_time;
u64 slb_esid_RW[8];
u64 slb_vsid_RW[8];
+ spinlock_t register_lock;
};
extern void spu_init_csa(struct spu_state *csa);