[CELL] spufs: fix decr_status meanings

The decr_status in the LSCSA is confusedly used as two meanings:
 * SPU decrementer was running
 * SPU decrementer was wrapped as a result of adjust
and the code to set decr_status is missing.

This patch fixes these problems by using the decr_status argument as a
set of flags. This requires a rebuild of the shipped spu_restore code.

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>

arch/powerpc/platforms/cell/spufs/spu_restore.c

@@ -90,7 +90,7 @@ static inline void restore_decr(void)
 	 *    decrementer value from LSCSA.
 	 */
 	offset = LSCSA_QW_OFFSET(decr_status);
-	decr_running = regs_spill[offset].slot[0];
+	decr_running = regs_spill[offset].slot[0] & SPU_DECR_STATUS_RUNNING;
 	if (decr_running) {
 		offset = LSCSA_QW_OFFSET(decr);
 		decr = regs_spill[offset].slot[0];

arch/powerpc/platforms/cell/spufs/spu_restore_dump.h_shipped

@@ -10,7 +10,7 @@ static unsigned int spu_restore_code[]  __attribute__((__aligned__(128))) = {
 0x24fd8081,
 0x1cd80081,
 0x33001180,
-0x42030003,
+0x42034003,
 0x33800284,
 0x1c010204,
 0x40200000,
@@ -24,22 +24,22 @@ static unsigned int spu_restore_code[]  __attribute__((__aligned__(128))) = {
 0x23fffd84,
 0x1c100183,
 0x217ffa85,
-0x3080a000,
+0x3080b000,
-0x3080a201,
+0x3080b201,
-0x3080a402,
+0x3080b402,
-0x3080a603,
+0x3080b603,
-0x3080a804,
+0x3080b804,
-0x3080aa05,
+0x3080ba05,
-0x3080ac06,
+0x3080bc06,
-0x3080ae07,
+0x3080be07,
-0x3080b008,
+0x3080c008,
-0x3080b209,
+0x3080c209,
-0x3080b40a,
+0x3080c40a,
-0x3080b60b,
+0x3080c60b,
-0x3080b80c,
+0x3080c80c,
-0x3080ba0d,
+0x3080ca0d,
-0x3080bc0e,
+0x3080cc0e,
-0x3080be0f,
+0x3080ce0f,
 0x00003ffc,
 0x00000000,
 0x00000000,
@@ -48,19 +48,18 @@ static unsigned int spu_restore_code[]  __attribute__((__aligned__(128))) = {
 0x3ec00083,
 0xb0a14103,
 0x01a00204,
-0x3ec10082,
+0x3ec10083,
-0x4202800e,
+0x4202c002,
-0x04000703,
+0xb0a14203,
-0xb0a14202,
+0x21a00802,
-0x21a00803,
+0x3fbf028a,
-0x3fbf028d,
+0x3f20050a,
-0x3f20068d,
+0x3fbe0502,
-0x3fbe0682,
 0x3fe30102,
 0x21a00882,
-0x3f82028f,
+0x3f82028b,
-0x3fe3078f,
+0x3fe3058b,
-0x3fbf0784,
+0x3fbf0584,
 0x3f200204,
 0x3fbe0204,
 0x3fe30204,
@@ -75,52 +74,46 @@ static unsigned int spu_restore_code[]  __attribute__((__aligned__(128))) = {
 0x21a00083,
 0x40800082,
 0x21a00b02,
-0x10002818,
+0x10002612,
-0x42a00002,
+0x42a00003,
-0x32800007,
+0x42074006,
-0x4207000c,
+0x1800c204,
-0x18008208,
+0x40a00008,
-0x40a0000b,
+0x40800789,
-0x4080020a,
+0x1c010305,
-0x40800709,
+0x34000302,
-0x00200000,
-0x42070002,
-0x3ac30384,
 0x1cffc489,
-0x00200000,
+0x3ec00303,
-0x18008383,
+0x3ec00287,
-0x38830382,
+0xb0408403,
-0x4cffc486,
+0x24000302,
-0x3ac28185,
+0x34000282,
-0xb0408584,
+0x1c020306,
-0x28830382,
+0xb0408207,
-0x1c020387,
+0x18020204,
-0x38828182,
+0x24000282,
-0xb0408405,
+0x217ffa09,
-0x1802c408,
+0x04000403,
-0x28828182,
-0x217ff886,
-0x04000583,
 0x21a00803,
-0x3fbe0682,
+0x3fbe0502,
 0x3fe30102,
-0x04000106,
+0x04000105,
-0x21a00886,
+0x21a00885,
-0x04000603,
+0x42074002,
-0x21a00903,
+0x21a00902,
-0x40803c02,
+0x40803c03,
-0x21a00982,
+0x21a00983,
-0x40800003,
+0x04000484,
-0x04000184,
 0x21a00a04,
 0x40802202,
 0x21a00a82,
-0x42028005,
+0x30809c03,
-0x34208702,
+0x34000182,
-0x21002282,
+0x14004102,
+0x21002782,
 0x21a00804,
-0x21a00886,
+0x21a00885,
-0x3fbf0782,
+0x3fbf0582,
 0x3f200102,
 0x3fbe0102,
 0x3fe30102,
@@ -133,196 +126,235 @@ static unsigned int spu_restore_code[]  __attribute__((__aligned__(128))) = {
 0x40800083,
 0x21a00b83,
 0x01a00c02,
-0x01a00d83,
+0x01a00d84,
-0x3420c282,
+0x3080a003,
+0x34000182,
 0x21a00e02,
-0x34210283,
+0x3080a203,
-0x21a00f03,
+0x34000182,
-0x34200284,
+0x21a00f02,
-0x77400200,
+0x3080a403,
-0x3421c282,
+0x34000182,
+0x77400100,
+0x3080a603,
+0x34000182,
 0x21a00702,
-0x34218283,
+0x3080a803,
-0x21a00083,
+0x34000182,
-0x34214282,
+0x21a00082,
+0x3080aa03,
+0x34000182,
 0x21a00b02,
-0x4200480c,
+0x3080ae02,
-0x00200000,
+0x3080ac04,
-0x1c010286,
+0x42004805,
-0x34220284,
+0x34000103,
-0x34220302,
+0x34000202,
-0x0f608203,
+0x1cffc183,
-0x5c024204,
+0x3b810106,
-0x3b81810b,
+0x0f608184,
-0x42013c02,
+0x42013802,
-0x00200000,
+0x5c020183,
-0x18008185,
+0x38810102,
-0x38808183,
+0x3b810102,
-0x3b814182,
+0x21000e83,
-0x21004e84,
 0x4020007f,
 0x35000100,
-0x000004e0,
+0x00000470,
-0x000002a0,
+0x000002f8,
-0x000002e8,
+0x00000430,
-0x00000428,
 0x00000360,
-0x000002e8,
+0x000002f8,
-0x000004a0,
-0x00000468,
 0x000003c8,
+0x000004a8,
+0x00000298,
 0x00000360,
-0x409ffe02,
-0x30801203,
-0x40800204,
-0x3ec40085,
-0x10009c09,
-0x3ac10606,
-0xb060c105,
-0x4020007f,
-0x4020007f,
-0x20801203,
-0x38810602,
-0xb0408586,
-0x28810602,
-0x32004180,
-0x34204702,
-0x21a00382,
-0x4020007f,
-0x327fdc80,
-0x409ffe02,
-0x30801203,
-0x40800204,
-0x3ec40087,
-0x40800405,
 0x00200000,
-0x40800606,
+0x409ffe02,
-0x3ac10608,
+0x30801203,
-0x3ac14609,
+0x40800208,
-0x3ac1860a,
+0x3ec40084,
-0xb060c107,
+0x40800407,
+0x3ac20289,
+0xb060c104,
+0x3ac1c284,
 0x20801203,
+0x38820282,
 0x41004003,
-0x38810602,
+0xb0408189,
-0x4020007f,
+0x28820282,
-0xb0408188,
+0x3881c282,
-0x4020007f,
+0xb0408304,
-0x28810602,
+0x2881c282,
-0x41201002,
-0x38814603,
-0x10009c09,
-0xb060c109,
-0x4020007f,
-0x28814603,
-0x41193f83,
-0x38818602,
-0x60ffc003,
-0xb040818a,
-0x28818602,
-0x32003080,
-0x409ffe02,
-0x30801203,
-0x40800204,
-0x3ec40087,
-0x41201008,
-0x10009c14,
-0x40800405,
-0x3ac10609,
-0x40800606,
-0x3ac1460a,
-0xb060c107,
-0x3ac1860b,
-0x20801203,
-0x38810602,
-0xb0408409,
-0x28810602,
-0x38814603,
-0xb060c40a,
-0x4020007f,
-0x28814603,
-0x41193f83,
-0x38818602,
-0x60ffc003,
-0xb040818b,
-0x28818602,
-0x32002380,
-0x409ffe02,
-0x30801204,
-0x40800205,
-0x3ec40083,
-0x40800406,
-0x3ac14607,
-0x3ac18608,
-0xb0810103,
-0x41004002,
-0x20801204,
-0x4020007f,
-0x38814603,
-0x10009c0b,
-0xb060c107,
-0x4020007f,
-0x4020007f,
-0x28814603,
-0x38818602,
-0x4020007f,
-0x4020007f,
-0xb0408588,
-0x28818602,
-0x4020007f,
-0x32001780,
-0x409ffe02,
-0x1000640e,
-0x40800204,
-0x30801203,
-0x40800405,
-0x3ec40087,
-0x40800606,
-0x3ac10608,
-0x3ac14609,
-0x3ac1860a,
-0xb060c107,
-0x20801203,
-0x413d8003,
-0x38810602,
-0x4020007f,
-0x327fd780,
-0x409ffe02,
-0x10007f0c,
-0x40800205,
-0x30801204,
-0x40800406,
-0x3ec40083,
-0x3ac14607,
-0x3ac18608,
-0xb0810103,
-0x413d8002,
-0x20801204,
-0x38814603,
-0x4020007f,
-0x327feb80,
-0x409ffe02,
-0x30801203,
-0x40800204,
-0x3ec40087,
-0x40800405,
-0x1000650a,
-0x40800606,
-0x3ac10608,
-0x3ac14609,
-0x3ac1860a,
-0xb060c107,
-0x20801203,
-0x38810602,
-0xb0408588,
-0x4020007f,
-0x327fc980,
 0x00400000,
 0x40800003,
-0x4020007f,
 0x35000000,
+0x30809e03,
+0x34000182,
+0x21a00382,
+0x4020007f,
+0x327fd700,
+0x409ffe02,
+0x30801203,
+0x40800206,
+0x3ec40084,
+0x40800407,
+0x40800608,
+0x3ac1828a,
+0x3ac20289,
+0xb060c104,
+0x3ac1c284,
+0x20801203,
+0x38818282,
+0x41004003,
+0xb040818a,
+0x10005b0b,
+0x41201003,
+0x28818282,
+0x3881c282,
+0xb0408184,
+0x41193f83,
+0x60ffc003,
+0x2881c282,
+0x38820282,
+0xb0408189,
+0x28820282,
+0x327fef80,
+0x409ffe02,
+0x30801203,
+0x40800207,
+0x3ec40086,
+0x4120100b,
+0x10005b14,
+0x40800404,
+0x3ac1c289,
+0x40800608,
+0xb060c106,
+0x3ac10286,
+0x3ac2028a,
+0x20801203,
+0x3881c282,
+0x41193f83,
+0x60ffc003,
+0xb0408589,
+0x2881c282,
+0x38810282,
+0xb0408586,
+0x28810282,
+0x38820282,
+0xb040818a,
+0x28820282,
+0x4020007f,
+0x327fe280,
+0x409ffe02,
+0x30801203,
+0x40800207,
+0x3ec40084,
+0x40800408,
+0x10005b14,
+0x40800609,
+0x3ac1c28a,
+0x3ac2028b,
+0xb060c104,
+0x3ac24284,
+0x20801203,
+0x41201003,
+0x3881c282,
+0xb040830a,
+0x2881c282,
+0x38820282,
+0xb040818b,
+0x41193f83,
+0x60ffc003,
+0x28820282,
+0x38824282,
+0xb0408184,
+0x28824282,
+0x4020007f,
+0x327fd580,
+0x409ffe02,
+0x1000658e,
+0x40800206,
+0x30801203,
+0x40800407,
+0x3ec40084,
+0x40800608,
+0x3ac1828a,
+0x3ac20289,
+0xb060c104,
+0x3ac1c284,
+0x20801203,
+0x413d8003,
+0x38818282,
+0x4020007f,
+0x327fd800,
+0x409ffe03,
+0x30801202,
+0x40800207,
+0x3ec40084,
+0x10005b09,
+0x3ac1c288,
+0xb0408184,
+0x4020007f,
+0x4020007f,
+0x20801202,
+0x3881c282,
+0xb0408308,
+0x2881c282,
+0x327fc680,
+0x409ffe02,
+0x1000588b,
+0x40800208,
+0x30801203,
+0x40800407,
+0x3ec40084,
+0x3ac20289,
+0xb060c104,
+0x3ac1c284,
+0x20801203,
+0x413d8003,
+0x38820282,
+0x327fbd80,
+0x00200000,
+0x00000da0,
 0x00000000,
 0x00000000,
 0x00000000,
+0x00000d90,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000db0,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000dc0,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000d80,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000df0,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000de0,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000dd0,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000e04,
+0x00000000,
+0x00000000,
+0x00000000,
+0x00000e00,
+0x00000000,
+0x00000000,
 0x00000000,
 0x00000000,
 0x00000000,

arch/powerpc/platforms/cell/spufs/switch.c

@@ -1285,7 +1285,15 @@ static inline void setup_decr(struct spu_state *csa, struct spu *spu)
 		cycles_t resume_time = get_cycles();
 		cycles_t delta_time = resume_time - csa->suspend_time;
 
+		csa->lscsa->decr_status.slot[0] = SPU_DECR_STATUS_RUNNING;
+		if (csa->lscsa->decr.slot[0] < delta_time) {
+			csa->lscsa->decr_status.slot[0] |=
+				 SPU_DECR_STATUS_WRAPPED;
+		}
+
 		csa->lscsa->decr.slot[0] -= delta_time;
+	} else {
+		csa->lscsa->decr_status.slot[0] = 0;
 	}
 }
 
@@ -1544,10 +1552,10 @@ 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] == 1) {
+	if (csa->lscsa->decr_status.slot[0] & SPU_DECR_STATUS_WRAPPED) {
 		csa->spu_chnldata_RW[0] |= 0x20;
 	}
-	if ((csa->lscsa->decr_status.slot[0] == 1) &&
+	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))) {

include/asm-powerpc/spu_csa.h

@@ -50,6 +50,12 @@
 #define SPU_STOPPED_STATUS_P_I  8
 #define SPU_STOPPED_STATUS_R    9
 
+/*
+ * Definitions for software decrementer status flag.
+ */
+#define SPU_DECR_STATUS_RUNNING 0x1
+#define SPU_DECR_STATUS_WRAPPED 0x2
+
 #ifndef  __ASSEMBLY__
 /**
  * spu_reg128 - generic 128-bit register definition.
@@ -63,7 +69,7 @@ struct spu_reg128 {
  * @gprs: Array of saved registers.
  * @fpcr: Saved floating point status control register.
  * @decr: Saved decrementer value.
- * @decr_status: Indicates decrementer run status.
+ * @decr_status: Indicates software decrementer status flags.
  * @ppu_mb: Saved PPU mailbox data.
  * @ppuint_mb: Saved PPU interrupting mailbox data.
  * @tag_mask: Saved tag group mask.