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[POWERPC] spufs: Fix restore_decr_wrapped() to match CBE Handbook

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Based on an original patch from Masato Noguchi
<Masato.Noguchi@jp.sony.com>.

We're currently not restoring the SPE decrementer as specified by the
CBE handbook. This change fixes our implementation to match, and makes
the function read more like the docs.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Jeremy Kerr 2007-09-19 14:38:12 +10:00 committed by Paul Mackerras
parent 4ec3c3d08d
commit 05a059f329
1 changed files with 8 additions and 8 deletions
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16
arch/powerpc/platforms/cell/spufs/switch.c
View file

@ -1559,15 +1559,15 @@ static inline void restore_decr_wrapped(struct spu_state *csa, struct spu *spu)
* "wrapped" flag is set, OR in a '1' to
* CSA.SPU_Event_Status[Tm].
*/
if (csa->lscsa->decr_status.slot[0] & SPU_DECR_STATUS_WRAPPED) {
csa->spu_chnldata_RW[0] |= 0x20;
}
if ((csa->lscsa->decr_status.slot[0] & SPU_DECR_STATUS_WRAPPED) &&
(csa->spu_chnlcnt_RW[0] == 0 &&
((csa->spu_chnldata_RW[2] & 0x20) == 0x0) &&
((csa->spu_chnldata_RW[0] & 0x20) != 0x1))) {
if (!(csa->lscsa->decr_status.slot[0] & SPU_DECR_STATUS_WRAPPED))
return;
if ((csa->spu_chnlcnt_RW[0] == 0) &&
(csa->spu_chnldata_RW[1] & 0x20) &&
!(csa->spu_chnldata_RW[0] & 0x20))
csa->spu_chnlcnt_RW[0] = 1;
}
csa->spu_chnldata_RW[0] |= 0x20;
}
static inline void restore_ch_part1(struct spu_state *csa, struct spu *spu)