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authorMasato Noguchi <Masato.Noguchi@jp.sony.com>2007-07-20 21:39:36 +0200
committerArnd Bergmann <arnd@klappe.arndb.de>2007-07-20 21:41:54 +0200
commitcfd529b25d9b1d48423b85d76066348e2459e646 (patch)
treeac5107616212af4f6c5bb5e3bcb75d71de9889a7 /arch/powerpc
parentdaced0f718b92b0bcdb9790622c255d4660f51ce (diff)
[CELL] spufs: remove needless context save/restore code
The following steps are not needed in the SPE context save/restore paths: Save Step 12: save_mfc_decr() save suspend_time to CSA (It will be done by step 14) save ch 7 (decrementer value will be saved in LSCSA by spe-side step 10) Restore Step 59: restore_ch_part1() restore ch 1 (it will be done by spe-side step 15) This change removes the unnecessary steps. Signed-off-by: Masato Noguchi <Masato.Noguchi@jp.sony.com> Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/platforms/cell/spufs/switch.c12
1 files changed, 1 insertions, 11 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/switch.c b/arch/powerpc/platforms/cell/spufs/switch.c
index 861336e99448..a08fe93817f6 100644
--- a/arch/powerpc/platforms/cell/spufs/switch.c
+++ b/arch/powerpc/platforms/cell/spufs/switch.c
@@ -253,11 +253,6 @@ static inline void save_mfc_decr(struct spu_state *csa, struct spu *spu)
*/
if (in_be64(&priv2->mfc_control_RW) & MFC_CNTL_DECREMENTER_RUNNING) {
csa->priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
- csa->suspend_time = get_cycles();
- out_be64(&priv2->spu_chnlcntptr_RW, 7ULL);
- eieio();
- csa->spu_chnldata_RW[7] = in_be64(&priv2->spu_chnldata_RW);
- eieio();
} else {
csa->priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING;
}
@@ -1567,13 +1562,8 @@ static inline void restore_ch_part1(struct spu_state *csa, struct spu *spu)
int i;
/* Restore, Step 59:
+ * Restore the following CH: [0,3,4,24,25,27]
*/
-
- /* Restore CH 1 without count */
- out_be64(&priv2->spu_chnlcntptr_RW, 1);
- out_be64(&priv2->spu_chnldata_RW, csa->spu_chnldata_RW[1]);
-
- /* Restore the following CH: [0,3,4,24,25,27] */
for (i = 0; i < ARRAY_SIZE(ch_indices); i++) {
idx = ch_indices[i];
out_be64(&priv2->spu_chnlcntptr_RW, idx);