4 * (C) Copyright IBM Corp. 2005
6 * Author: Mark Nutter <mnutter@us.ibm.com>
8 * Host-side part of SPU context switch sequence outlined in
9 * Synergistic Processor Element, Book IV.
11 * A fully premptive switch of an SPE is very expensive in terms
12 * of time and system resources. SPE Book IV indicates that SPE
13 * allocation should follow a "serially reusable device" model,
14 * in which the SPE is assigned a task until it completes. When
15 * this is not possible, this sequence may be used to premptively
16 * save, and then later (optionally) restore the context of a
17 * program executing on an SPE.
20 * This program is free software; you can redistribute it and/or modify
21 * it under the terms of the GNU General Public License as published by
22 * the Free Software Foundation; either version 2, or (at your option)
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
35 #include <linux/module.h>
36 #include <linux/errno.h>
37 #include <linux/sched.h>
38 #include <linux/kernel.h>
40 #include <linux/vmalloc.h>
41 #include <linux/smp.h>
42 #include <linux/stddef.h>
43 #include <linux/unistd.h>
47 #include <asm/spu_priv1.h>
48 #include <asm/spu_csa.h>
49 #include <asm/mmu_context.h>
51 #include "spu_save_dump.h"
52 #include "spu_restore_dump.h"
55 #define POLL_WHILE_TRUE(_c) { \
60 #define RELAX_SPIN_COUNT 1000
61 #define POLL_WHILE_TRUE(_c) { \
64 for (_i=0; _i<RELAX_SPIN_COUNT && (_c); _i++) { \
67 if (unlikely(_c)) yield(); \
73 #define POLL_WHILE_FALSE(_c) POLL_WHILE_TRUE(!(_c))
75 static inline void acquire_spu_lock(struct spu *spu)
79 * Acquire SPU-specific mutual exclusion lock.
84 static inline void release_spu_lock(struct spu *spu)
87 * Release SPU-specific mutual exclusion lock.
92 static inline int check_spu_isolate(struct spu_state *csa, struct spu *spu)
94 struct spu_problem __iomem *prob = spu->problem;
99 * If SPU_Status[E,L,IS] any field is '1', this
100 * SPU is in isolate state and cannot be context
101 * saved at this time.
103 isolate_state = SPU_STATUS_ISOLATED_STATE |
104 SPU_STATUS_ISOLATED_LOAD_STATUS | SPU_STATUS_ISOLATED_EXIT_STATUS;
105 return (in_be32(&prob->spu_status_R) & isolate_state) ? 1 : 0;
108 static inline void disable_interrupts(struct spu_state *csa, struct spu *spu)
112 * Save INT_Mask_class0 in CSA.
113 * Write INT_MASK_class0 with value of 0.
114 * Save INT_Mask_class1 in CSA.
115 * Write INT_MASK_class1 with value of 0.
116 * Save INT_Mask_class2 in CSA.
117 * Write INT_MASK_class2 with value of 0.
119 spin_lock_irq(&spu->register_lock);
121 csa->priv1.int_mask_class0_RW = spu_int_mask_get(spu, 0);
122 csa->priv1.int_mask_class1_RW = spu_int_mask_get(spu, 1);
123 csa->priv1.int_mask_class2_RW = spu_int_mask_get(spu, 2);
125 spu_int_mask_set(spu, 0, 0ul);
126 spu_int_mask_set(spu, 1, 0ul);
127 spu_int_mask_set(spu, 2, 0ul);
129 spin_unlock_irq(&spu->register_lock);
132 static inline void set_watchdog_timer(struct spu_state *csa, struct spu *spu)
136 * Set a software watchdog timer, which specifies the
137 * maximum allowable time for a context save sequence.
139 * For present, this implementation will not set a global
140 * watchdog timer, as virtualization & variable system load
141 * may cause unpredictable execution times.
145 static inline void inhibit_user_access(struct spu_state *csa, struct spu *spu)
149 * Inhibit user-space access (if provided) to this
150 * SPU by unmapping the virtual pages assigned to
151 * the SPU memory-mapped I/O (MMIO) for problem
156 static inline void set_switch_pending(struct spu_state *csa, struct spu *spu)
160 * Set a software context switch pending flag.
162 set_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags);
166 static inline void save_mfc_cntl(struct spu_state *csa, struct spu *spu)
168 struct spu_priv2 __iomem *priv2 = spu->priv2;
171 * Suspend DMA and save MFC_CNTL.
173 switch (in_be64(&priv2->mfc_control_RW) &
174 MFC_CNTL_SUSPEND_DMA_STATUS_MASK) {
175 case MFC_CNTL_SUSPEND_IN_PROGRESS:
176 POLL_WHILE_FALSE((in_be64(&priv2->mfc_control_RW) &
177 MFC_CNTL_SUSPEND_DMA_STATUS_MASK) ==
178 MFC_CNTL_SUSPEND_COMPLETE);
180 case MFC_CNTL_SUSPEND_COMPLETE:
182 csa->priv2.mfc_control_RW =
183 in_be64(&priv2->mfc_control_RW) |
184 MFC_CNTL_SUSPEND_DMA_QUEUE;
187 case MFC_CNTL_NORMAL_DMA_QUEUE_OPERATION:
188 out_be64(&priv2->mfc_control_RW, MFC_CNTL_SUSPEND_DMA_QUEUE);
189 POLL_WHILE_FALSE((in_be64(&priv2->mfc_control_RW) &
190 MFC_CNTL_SUSPEND_DMA_STATUS_MASK) ==
191 MFC_CNTL_SUSPEND_COMPLETE);
193 csa->priv2.mfc_control_RW =
194 in_be64(&priv2->mfc_control_RW) &
195 ~MFC_CNTL_SUSPEND_DMA_QUEUE;
201 static inline void save_spu_runcntl(struct spu_state *csa, struct spu *spu)
203 struct spu_problem __iomem *prob = spu->problem;
206 * Save SPU_Runcntl in the CSA. This value contains
207 * the "Application Desired State".
209 csa->prob.spu_runcntl_RW = in_be32(&prob->spu_runcntl_RW);
212 static inline void save_mfc_sr1(struct spu_state *csa, struct spu *spu)
215 * Save MFC_SR1 in the CSA.
217 csa->priv1.mfc_sr1_RW = spu_mfc_sr1_get(spu);
220 static inline void save_spu_status(struct spu_state *csa, struct spu *spu)
222 struct spu_problem __iomem *prob = spu->problem;
225 * Read SPU_Status[R], and save to CSA.
227 if ((in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING) == 0) {
228 csa->prob.spu_status_R = in_be32(&prob->spu_status_R);
232 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP);
234 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
237 SPU_STATUS_INVALID_INSTR | SPU_STATUS_SINGLE_STEP |
238 SPU_STATUS_STOPPED_BY_HALT | SPU_STATUS_STOPPED_BY_STOP;
239 if ((in_be32(&prob->spu_status_R) & stopped) == 0)
240 csa->prob.spu_status_R = SPU_STATUS_RUNNING;
242 csa->prob.spu_status_R = in_be32(&prob->spu_status_R);
246 static inline void save_mfc_decr(struct spu_state *csa, struct spu *spu)
248 struct spu_priv2 __iomem *priv2 = spu->priv2;
251 * Read MFC_CNTL[Ds]. Update saved copy of
254 if (in_be64(&priv2->mfc_control_RW) & MFC_CNTL_DECREMENTER_RUNNING) {
255 csa->priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
257 csa->priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING;
261 static inline void halt_mfc_decr(struct spu_state *csa, struct spu *spu)
263 struct spu_priv2 __iomem *priv2 = spu->priv2;
266 * Write MFC_CNTL[Dh] set to a '1' to halt
269 out_be64(&priv2->mfc_control_RW,
270 MFC_CNTL_DECREMENTER_HALTED | MFC_CNTL_SUSPEND_MASK);
274 static inline void save_timebase(struct spu_state *csa, struct spu *spu)
277 * Read PPE Timebase High and Timebase low registers
278 * and save in CSA. TBD.
280 csa->suspend_time = get_cycles();
283 static inline void remove_other_spu_access(struct spu_state *csa,
287 * Remove other SPU access to this SPU by unmapping
288 * this SPU's pages from their address space. TBD.
292 static inline void do_mfc_mssync(struct spu_state *csa, struct spu *spu)
294 struct spu_problem __iomem *prob = spu->problem;
298 * Write SPU_MSSync register. Poll SPU_MSSync[P]
301 out_be64(&prob->spc_mssync_RW, 1UL);
302 POLL_WHILE_TRUE(in_be64(&prob->spc_mssync_RW) & MS_SYNC_PENDING);
305 static inline void issue_mfc_tlbie(struct spu_state *csa, struct spu *spu)
310 * Write TLB_Invalidate_Entry[IS,VPN,L,Lp]=0 register.
311 * Then issue a PPE sync instruction.
313 spu_tlb_invalidate(spu);
317 static inline void handle_pending_interrupts(struct spu_state *csa,
321 * Handle any pending interrupts from this SPU
322 * here. This is OS or hypervisor specific. One
323 * option is to re-enable interrupts to handle any
324 * pending interrupts, with the interrupt handlers
325 * recognizing the software Context Switch Pending
326 * flag, to ensure the SPU execution or MFC command
327 * queue is not restarted. TBD.
331 static inline void save_mfc_queues(struct spu_state *csa, struct spu *spu)
333 struct spu_priv2 __iomem *priv2 = spu->priv2;
337 * If MFC_Cntl[Se]=0 then save
338 * MFC command queues.
340 if ((in_be64(&priv2->mfc_control_RW) & MFC_CNTL_DMA_QUEUES_EMPTY) == 0) {
341 for (i = 0; i < 8; i++) {
342 csa->priv2.puq[i].mfc_cq_data0_RW =
343 in_be64(&priv2->puq[i].mfc_cq_data0_RW);
344 csa->priv2.puq[i].mfc_cq_data1_RW =
345 in_be64(&priv2->puq[i].mfc_cq_data1_RW);
346 csa->priv2.puq[i].mfc_cq_data2_RW =
347 in_be64(&priv2->puq[i].mfc_cq_data2_RW);
348 csa->priv2.puq[i].mfc_cq_data3_RW =
349 in_be64(&priv2->puq[i].mfc_cq_data3_RW);
351 for (i = 0; i < 16; i++) {
352 csa->priv2.spuq[i].mfc_cq_data0_RW =
353 in_be64(&priv2->spuq[i].mfc_cq_data0_RW);
354 csa->priv2.spuq[i].mfc_cq_data1_RW =
355 in_be64(&priv2->spuq[i].mfc_cq_data1_RW);
356 csa->priv2.spuq[i].mfc_cq_data2_RW =
357 in_be64(&priv2->spuq[i].mfc_cq_data2_RW);
358 csa->priv2.spuq[i].mfc_cq_data3_RW =
359 in_be64(&priv2->spuq[i].mfc_cq_data3_RW);
364 static inline void save_ppu_querymask(struct spu_state *csa, struct spu *spu)
366 struct spu_problem __iomem *prob = spu->problem;
369 * Save the PPU_QueryMask register
372 csa->prob.dma_querymask_RW = in_be32(&prob->dma_querymask_RW);
375 static inline void save_ppu_querytype(struct spu_state *csa, struct spu *spu)
377 struct spu_problem __iomem *prob = spu->problem;
380 * Save the PPU_QueryType register
383 csa->prob.dma_querytype_RW = in_be32(&prob->dma_querytype_RW);
386 static inline void save_ppu_tagstatus(struct spu_state *csa, struct spu *spu)
388 struct spu_problem __iomem *prob = spu->problem;
390 /* Save the Prxy_TagStatus register in the CSA.
392 * It is unnecessary to restore dma_tagstatus_R, however,
393 * dma_tagstatus_R in the CSA is accessed via backing_ops, so
396 csa->prob.dma_tagstatus_R = in_be32(&prob->dma_tagstatus_R);
399 static inline void save_mfc_csr_tsq(struct spu_state *csa, struct spu *spu)
401 struct spu_priv2 __iomem *priv2 = spu->priv2;
404 * Save the MFC_CSR_TSQ register
407 csa->priv2.spu_tag_status_query_RW =
408 in_be64(&priv2->spu_tag_status_query_RW);
411 static inline void save_mfc_csr_cmd(struct spu_state *csa, struct spu *spu)
413 struct spu_priv2 __iomem *priv2 = spu->priv2;
416 * Save the MFC_CSR_CMD1 and MFC_CSR_CMD2
417 * registers in the CSA.
419 csa->priv2.spu_cmd_buf1_RW = in_be64(&priv2->spu_cmd_buf1_RW);
420 csa->priv2.spu_cmd_buf2_RW = in_be64(&priv2->spu_cmd_buf2_RW);
423 static inline void save_mfc_csr_ato(struct spu_state *csa, struct spu *spu)
425 struct spu_priv2 __iomem *priv2 = spu->priv2;
428 * Save the MFC_CSR_ATO register in
431 csa->priv2.spu_atomic_status_RW = in_be64(&priv2->spu_atomic_status_RW);
434 static inline void save_mfc_tclass_id(struct spu_state *csa, struct spu *spu)
437 * Save the MFC_TCLASS_ID register in
440 csa->priv1.mfc_tclass_id_RW = spu_mfc_tclass_id_get(spu);
443 static inline void set_mfc_tclass_id(struct spu_state *csa, struct spu *spu)
447 * Write the MFC_TCLASS_ID register with
448 * the value 0x10000000.
450 spu_mfc_tclass_id_set(spu, 0x10000000);
454 static inline void purge_mfc_queue(struct spu_state *csa, struct spu *spu)
456 struct spu_priv2 __iomem *priv2 = spu->priv2;
460 * Write MFC_CNTL[Pc]=1 (purge queue).
462 out_be64(&priv2->mfc_control_RW, MFC_CNTL_PURGE_DMA_REQUEST);
466 static inline void wait_purge_complete(struct spu_state *csa, struct spu *spu)
468 struct spu_priv2 __iomem *priv2 = spu->priv2;
471 * Poll MFC_CNTL[Ps] until value '11' is read
474 POLL_WHILE_FALSE((in_be64(&priv2->mfc_control_RW) &
475 MFC_CNTL_PURGE_DMA_STATUS_MASK) ==
476 MFC_CNTL_PURGE_DMA_COMPLETE);
479 static inline void setup_mfc_sr1(struct spu_state *csa, struct spu *spu)
483 * Write MFC_SR1 with MFC_SR1[D=0,S=1] and
484 * MFC_SR1[TL,R,Pr,T] set correctly for the
485 * OS specific environment.
487 * Implementation note: The SPU-side code
488 * for save/restore is privileged, so the
489 * MFC_SR1[Pr] bit is not set.
492 spu_mfc_sr1_set(spu, (MFC_STATE1_MASTER_RUN_CONTROL_MASK |
493 MFC_STATE1_RELOCATE_MASK |
494 MFC_STATE1_BUS_TLBIE_MASK));
497 static inline void save_spu_npc(struct spu_state *csa, struct spu *spu)
499 struct spu_problem __iomem *prob = spu->problem;
502 * Save SPU_NPC in the CSA.
504 csa->prob.spu_npc_RW = in_be32(&prob->spu_npc_RW);
507 static inline void save_spu_privcntl(struct spu_state *csa, struct spu *spu)
509 struct spu_priv2 __iomem *priv2 = spu->priv2;
512 * Save SPU_PrivCntl in the CSA.
514 csa->priv2.spu_privcntl_RW = in_be64(&priv2->spu_privcntl_RW);
517 static inline void reset_spu_privcntl(struct spu_state *csa, struct spu *spu)
519 struct spu_priv2 __iomem *priv2 = spu->priv2;
523 * Write SPU_PrivCntl[S,Le,A] fields reset to 0.
525 out_be64(&priv2->spu_privcntl_RW, 0UL);
529 static inline void save_spu_lslr(struct spu_state *csa, struct spu *spu)
531 struct spu_priv2 __iomem *priv2 = spu->priv2;
534 * Save SPU_LSLR in the CSA.
536 csa->priv2.spu_lslr_RW = in_be64(&priv2->spu_lslr_RW);
539 static inline void reset_spu_lslr(struct spu_state *csa, struct spu *spu)
541 struct spu_priv2 __iomem *priv2 = spu->priv2;
547 out_be64(&priv2->spu_lslr_RW, LS_ADDR_MASK);
551 static inline void save_spu_cfg(struct spu_state *csa, struct spu *spu)
553 struct spu_priv2 __iomem *priv2 = spu->priv2;
556 * Save SPU_Cfg in the CSA.
558 csa->priv2.spu_cfg_RW = in_be64(&priv2->spu_cfg_RW);
561 static inline void save_pm_trace(struct spu_state *csa, struct spu *spu)
564 * Save PM_Trace_Tag_Wait_Mask in the CSA.
565 * Not performed by this implementation.
569 static inline void save_mfc_rag(struct spu_state *csa, struct spu *spu)
572 * Save RA_GROUP_ID register and the
573 * RA_ENABLE reigster in the CSA.
575 csa->priv1.resource_allocation_groupID_RW =
576 spu_resource_allocation_groupID_get(spu);
577 csa->priv1.resource_allocation_enable_RW =
578 spu_resource_allocation_enable_get(spu);
581 static inline void save_ppu_mb_stat(struct spu_state *csa, struct spu *spu)
583 struct spu_problem __iomem *prob = spu->problem;
586 * Save MB_Stat register in the CSA.
588 csa->prob.mb_stat_R = in_be32(&prob->mb_stat_R);
591 static inline void save_ppu_mb(struct spu_state *csa, struct spu *spu)
593 struct spu_problem __iomem *prob = spu->problem;
596 * Save the PPU_MB register in the CSA.
598 csa->prob.pu_mb_R = in_be32(&prob->pu_mb_R);
601 static inline void save_ppuint_mb(struct spu_state *csa, struct spu *spu)
603 struct spu_priv2 __iomem *priv2 = spu->priv2;
606 * Save the PPUINT_MB register in the CSA.
608 csa->priv2.puint_mb_R = in_be64(&priv2->puint_mb_R);
611 static inline void save_ch_part1(struct spu_state *csa, struct spu *spu)
613 struct spu_priv2 __iomem *priv2 = spu->priv2;
614 u64 idx, ch_indices[] = { 0UL, 3UL, 4UL, 24UL, 25UL, 27UL };
620 /* Save CH 1, without channel count */
621 out_be64(&priv2->spu_chnlcntptr_RW, 1);
622 csa->spu_chnldata_RW[1] = in_be64(&priv2->spu_chnldata_RW);
624 /* Save the following CH: [0,3,4,24,25,27] */
625 for (i = 0; i < ARRAY_SIZE(ch_indices); i++) {
627 out_be64(&priv2->spu_chnlcntptr_RW, idx);
629 csa->spu_chnldata_RW[idx] = in_be64(&priv2->spu_chnldata_RW);
630 csa->spu_chnlcnt_RW[idx] = in_be64(&priv2->spu_chnlcnt_RW);
631 out_be64(&priv2->spu_chnldata_RW, 0UL);
632 out_be64(&priv2->spu_chnlcnt_RW, 0UL);
637 static inline void save_spu_mb(struct spu_state *csa, struct spu *spu)
639 struct spu_priv2 __iomem *priv2 = spu->priv2;
643 * Save SPU Read Mailbox Channel.
645 out_be64(&priv2->spu_chnlcntptr_RW, 29UL);
647 csa->spu_chnlcnt_RW[29] = in_be64(&priv2->spu_chnlcnt_RW);
648 for (i = 0; i < 4; i++) {
649 csa->spu_mailbox_data[i] = in_be64(&priv2->spu_chnldata_RW);
651 out_be64(&priv2->spu_chnlcnt_RW, 0UL);
655 static inline void save_mfc_cmd(struct spu_state *csa, struct spu *spu)
657 struct spu_priv2 __iomem *priv2 = spu->priv2;
660 * Save MFC_CMD Channel.
662 out_be64(&priv2->spu_chnlcntptr_RW, 21UL);
664 csa->spu_chnlcnt_RW[21] = in_be64(&priv2->spu_chnlcnt_RW);
668 static inline void reset_ch(struct spu_state *csa, struct spu *spu)
670 struct spu_priv2 __iomem *priv2 = spu->priv2;
671 u64 ch_indices[4] = { 21UL, 23UL, 28UL, 30UL };
672 u64 ch_counts[4] = { 16UL, 1UL, 1UL, 1UL };
677 * Reset the following CH: [21, 23, 28, 30]
679 for (i = 0; i < 4; i++) {
681 out_be64(&priv2->spu_chnlcntptr_RW, idx);
683 out_be64(&priv2->spu_chnlcnt_RW, ch_counts[i]);
688 static inline void resume_mfc_queue(struct spu_state *csa, struct spu *spu)
690 struct spu_priv2 __iomem *priv2 = spu->priv2;
694 * Write MFC_CNTL[Sc]=0 (resume queue processing).
696 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESUME_DMA_QUEUE);
699 static inline void get_kernel_slb(u64 ea, u64 slb[2])
703 if (REGION_ID(ea) == KERNEL_REGION_ID)
704 llp = mmu_psize_defs[mmu_linear_psize].sllp;
706 llp = mmu_psize_defs[mmu_virtual_psize].sllp;
707 slb[0] = (get_kernel_vsid(ea) << SLB_VSID_SHIFT) |
708 SLB_VSID_KERNEL | llp;
709 slb[1] = (ea & ESID_MASK) | SLB_ESID_V;
712 static inline void load_mfc_slb(struct spu *spu, u64 slb[2], int slbe)
714 struct spu_priv2 __iomem *priv2 = spu->priv2;
716 out_be64(&priv2->slb_index_W, slbe);
718 out_be64(&priv2->slb_vsid_RW, slb[0]);
719 out_be64(&priv2->slb_esid_RW, slb[1]);
723 static inline void setup_mfc_slbs(struct spu_state *csa, struct spu *spu)
730 * If MFC_SR1[R]=1, write 0 to SLB_Invalidate_All
731 * register, then initialize SLB_VSID and SLB_ESID
732 * to provide access to SPU context save code and
735 * This implementation places both the context
736 * switch code and LSCSA in kernel address space.
738 * Further this implementation assumes that the
739 * MFC_SR1[R]=1 (in other words, assume that
740 * translation is desired by OS environment).
742 spu_invalidate_slbs(spu);
743 get_kernel_slb((unsigned long)&spu_save_code[0], code_slb);
744 get_kernel_slb((unsigned long)csa->lscsa, lscsa_slb);
745 load_mfc_slb(spu, code_slb, 0);
746 if ((lscsa_slb[0] != code_slb[0]) || (lscsa_slb[1] != code_slb[1]))
747 load_mfc_slb(spu, lscsa_slb, 1);
750 static inline void set_switch_active(struct spu_state *csa, struct spu *spu)
754 * Change the software context switch pending flag
755 * to context switch active.
757 set_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
758 clear_bit(SPU_CONTEXT_SWITCH_PENDING, &spu->flags);
762 static inline void enable_interrupts(struct spu_state *csa, struct spu *spu)
764 unsigned long class1_mask = CLASS1_ENABLE_SEGMENT_FAULT_INTR |
765 CLASS1_ENABLE_STORAGE_FAULT_INTR;
769 * Reset and then enable interrupts, as
772 * This implementation enables only class1
773 * (translation) interrupts.
775 spin_lock_irq(&spu->register_lock);
776 spu_int_stat_clear(spu, 0, ~0ul);
777 spu_int_stat_clear(spu, 1, ~0ul);
778 spu_int_stat_clear(spu, 2, ~0ul);
779 spu_int_mask_set(spu, 0, 0ul);
780 spu_int_mask_set(spu, 1, class1_mask);
781 spu_int_mask_set(spu, 2, 0ul);
782 spin_unlock_irq(&spu->register_lock);
785 static inline int send_mfc_dma(struct spu *spu, unsigned long ea,
786 unsigned int ls_offset, unsigned int size,
787 unsigned int tag, unsigned int rclass,
790 struct spu_problem __iomem *prob = spu->problem;
791 union mfc_tag_size_class_cmd command;
792 unsigned int transfer_size;
793 volatile unsigned int status = 0x0;
797 (size > MFC_MAX_DMA_SIZE) ? MFC_MAX_DMA_SIZE : size;
798 command.u.mfc_size = transfer_size;
799 command.u.mfc_tag = tag;
800 command.u.mfc_rclassid = rclass;
801 command.u.mfc_cmd = cmd;
803 out_be32(&prob->mfc_lsa_W, ls_offset);
804 out_be64(&prob->mfc_ea_W, ea);
805 out_be64(&prob->mfc_union_W.all64, command.all64);
807 in_be32(&prob->mfc_union_W.by32.mfc_class_cmd32);
808 if (unlikely(status & 0x2)) {
811 } while (status & 0x3);
812 size -= transfer_size;
814 ls_offset += transfer_size;
819 static inline void save_ls_16kb(struct spu_state *csa, struct spu *spu)
821 unsigned long addr = (unsigned long)&csa->lscsa->ls[0];
822 unsigned int ls_offset = 0x0;
823 unsigned int size = 16384;
824 unsigned int tag = 0;
825 unsigned int rclass = 0;
826 unsigned int cmd = MFC_PUT_CMD;
829 * Issue a DMA command to copy the first 16K bytes
830 * of local storage to the CSA.
832 send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd);
835 static inline void set_spu_npc(struct spu_state *csa, struct spu *spu)
837 struct spu_problem __iomem *prob = spu->problem;
841 * Write SPU_NPC[IE]=0 and SPU_NPC[LSA] to entry
842 * point address of context save code in local
845 * This implementation uses SPU-side save/restore
846 * programs with entry points at LSA of 0.
848 out_be32(&prob->spu_npc_RW, 0);
852 static inline void set_signot1(struct spu_state *csa, struct spu *spu)
854 struct spu_problem __iomem *prob = spu->problem;
862 * Write SPU_Sig_Notify_1 register with upper 32-bits
863 * of the CSA.LSCSA effective address.
865 addr64.ull = (u64) csa->lscsa;
866 out_be32(&prob->signal_notify1, addr64.ui[0]);
870 static inline void set_signot2(struct spu_state *csa, struct spu *spu)
872 struct spu_problem __iomem *prob = spu->problem;
880 * Write SPU_Sig_Notify_2 register with lower 32-bits
881 * of the CSA.LSCSA effective address.
883 addr64.ull = (u64) csa->lscsa;
884 out_be32(&prob->signal_notify2, addr64.ui[1]);
888 static inline void send_save_code(struct spu_state *csa, struct spu *spu)
890 unsigned long addr = (unsigned long)&spu_save_code[0];
891 unsigned int ls_offset = 0x0;
892 unsigned int size = sizeof(spu_save_code);
893 unsigned int tag = 0;
894 unsigned int rclass = 0;
895 unsigned int cmd = MFC_GETFS_CMD;
898 * Issue a DMA command to copy context save code
899 * to local storage and start SPU.
901 send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd);
904 static inline void set_ppu_querymask(struct spu_state *csa, struct spu *spu)
906 struct spu_problem __iomem *prob = spu->problem;
910 * Write PPU_QueryMask=1 (enable Tag Group 0)
911 * and issue eieio instruction.
913 out_be32(&prob->dma_querymask_RW, MFC_TAGID_TO_TAGMASK(0));
917 static inline void wait_tag_complete(struct spu_state *csa, struct spu *spu)
919 struct spu_problem __iomem *prob = spu->problem;
920 u32 mask = MFC_TAGID_TO_TAGMASK(0);
927 * Poll PPU_TagStatus[gn] until 01 (Tag group 0 complete)
928 * or write PPU_QueryType[TS]=01 and wait for Tag Group
929 * Complete Interrupt. Write INT_Stat_Class0 or
930 * INT_Stat_Class2 with value of 'handled'.
932 POLL_WHILE_FALSE(in_be32(&prob->dma_tagstatus_R) & mask);
934 local_irq_save(flags);
935 spu_int_stat_clear(spu, 0, ~(0ul));
936 spu_int_stat_clear(spu, 2, ~(0ul));
937 local_irq_restore(flags);
940 static inline void wait_spu_stopped(struct spu_state *csa, struct spu *spu)
942 struct spu_problem __iomem *prob = spu->problem;
947 * Poll until SPU_Status[R]=0 or wait for SPU Class 0
948 * or SPU Class 2 interrupt. Write INT_Stat_class0
949 * or INT_Stat_class2 with value of handled.
951 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING);
953 local_irq_save(flags);
954 spu_int_stat_clear(spu, 0, ~(0ul));
955 spu_int_stat_clear(spu, 2, ~(0ul));
956 local_irq_restore(flags);
959 static inline int check_save_status(struct spu_state *csa, struct spu *spu)
961 struct spu_problem __iomem *prob = spu->problem;
965 * If SPU_Status[P]=1 and SPU_Status[SC] = "success",
966 * context save succeeded, otherwise context save
969 complete = ((SPU_SAVE_COMPLETE << SPU_STOP_STATUS_SHIFT) |
970 SPU_STATUS_STOPPED_BY_STOP);
971 return (in_be32(&prob->spu_status_R) != complete) ? 1 : 0;
974 static inline void terminate_spu_app(struct spu_state *csa, struct spu *spu)
977 * If required, notify the "using application" that
978 * the SPU task has been terminated. TBD.
982 static inline void suspend_mfc(struct spu_state *csa, struct spu *spu)
984 struct spu_priv2 __iomem *priv2 = spu->priv2;
988 * Write MFC_Cntl[Dh,Sc]='1','1' to suspend
989 * the queue and halt the decrementer.
991 out_be64(&priv2->mfc_control_RW, MFC_CNTL_SUSPEND_DMA_QUEUE |
992 MFC_CNTL_DECREMENTER_HALTED);
996 static inline void wait_suspend_mfc_complete(struct spu_state *csa,
999 struct spu_priv2 __iomem *priv2 = spu->priv2;
1003 * Poll MFC_CNTL[Ss] until 11 is returned.
1005 POLL_WHILE_FALSE((in_be64(&priv2->mfc_control_RW) &
1006 MFC_CNTL_SUSPEND_DMA_STATUS_MASK) ==
1007 MFC_CNTL_SUSPEND_COMPLETE);
1010 static inline int suspend_spe(struct spu_state *csa, struct spu *spu)
1012 struct spu_problem __iomem *prob = spu->problem;
1015 * If SPU_Status[R]=1, stop SPU execution
1016 * and wait for stop to complete.
1018 * Returns 1 if SPU_Status[R]=1 on entry.
1021 if (in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING) {
1022 if (in_be32(&prob->spu_status_R) &
1023 SPU_STATUS_ISOLATED_EXIT_STATUS) {
1024 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1025 SPU_STATUS_RUNNING);
1027 if ((in_be32(&prob->spu_status_R) &
1028 SPU_STATUS_ISOLATED_LOAD_STATUS)
1029 || (in_be32(&prob->spu_status_R) &
1030 SPU_STATUS_ISOLATED_STATE)) {
1031 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP);
1033 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1034 SPU_STATUS_RUNNING);
1035 out_be32(&prob->spu_runcntl_RW, 0x2);
1037 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1038 SPU_STATUS_RUNNING);
1040 if (in_be32(&prob->spu_status_R) &
1041 SPU_STATUS_WAITING_FOR_CHANNEL) {
1042 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP);
1044 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1045 SPU_STATUS_RUNNING);
1052 static inline void clear_spu_status(struct spu_state *csa, struct spu *spu)
1054 struct spu_problem __iomem *prob = spu->problem;
1056 /* Restore, Step 10:
1057 * If SPU_Status[R]=0 and SPU_Status[E,L,IS]=1,
1058 * release SPU from isolate state.
1060 if (!(in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING)) {
1061 if (in_be32(&prob->spu_status_R) &
1062 SPU_STATUS_ISOLATED_EXIT_STATUS) {
1063 spu_mfc_sr1_set(spu,
1064 MFC_STATE1_MASTER_RUN_CONTROL_MASK);
1066 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE);
1068 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1069 SPU_STATUS_RUNNING);
1071 if ((in_be32(&prob->spu_status_R) &
1072 SPU_STATUS_ISOLATED_LOAD_STATUS)
1073 || (in_be32(&prob->spu_status_R) &
1074 SPU_STATUS_ISOLATED_STATE)) {
1075 spu_mfc_sr1_set(spu,
1076 MFC_STATE1_MASTER_RUN_CONTROL_MASK);
1078 out_be32(&prob->spu_runcntl_RW, 0x2);
1080 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1081 SPU_STATUS_RUNNING);
1086 static inline void reset_ch_part1(struct spu_state *csa, struct spu *spu)
1088 struct spu_priv2 __iomem *priv2 = spu->priv2;
1089 u64 ch_indices[] = { 0UL, 3UL, 4UL, 24UL, 25UL, 27UL };
1093 /* Restore, Step 20:
1097 out_be64(&priv2->spu_chnlcntptr_RW, 1);
1098 out_be64(&priv2->spu_chnldata_RW, 0UL);
1100 /* Reset the following CH: [0,3,4,24,25,27] */
1101 for (i = 0; i < ARRAY_SIZE(ch_indices); i++) {
1102 idx = ch_indices[i];
1103 out_be64(&priv2->spu_chnlcntptr_RW, idx);
1105 out_be64(&priv2->spu_chnldata_RW, 0UL);
1106 out_be64(&priv2->spu_chnlcnt_RW, 0UL);
1111 static inline void reset_ch_part2(struct spu_state *csa, struct spu *spu)
1113 struct spu_priv2 __iomem *priv2 = spu->priv2;
1114 u64 ch_indices[5] = { 21UL, 23UL, 28UL, 29UL, 30UL };
1115 u64 ch_counts[5] = { 16UL, 1UL, 1UL, 0UL, 1UL };
1119 /* Restore, Step 21:
1120 * Reset the following CH: [21, 23, 28, 29, 30]
1122 for (i = 0; i < 5; i++) {
1123 idx = ch_indices[i];
1124 out_be64(&priv2->spu_chnlcntptr_RW, idx);
1126 out_be64(&priv2->spu_chnlcnt_RW, ch_counts[i]);
1131 static inline void setup_spu_status_part1(struct spu_state *csa,
1134 u32 status_P = SPU_STATUS_STOPPED_BY_STOP;
1135 u32 status_I = SPU_STATUS_INVALID_INSTR;
1136 u32 status_H = SPU_STATUS_STOPPED_BY_HALT;
1137 u32 status_S = SPU_STATUS_SINGLE_STEP;
1138 u32 status_S_I = SPU_STATUS_SINGLE_STEP | SPU_STATUS_INVALID_INSTR;
1139 u32 status_S_P = SPU_STATUS_SINGLE_STEP | SPU_STATUS_STOPPED_BY_STOP;
1140 u32 status_P_H = SPU_STATUS_STOPPED_BY_HALT |SPU_STATUS_STOPPED_BY_STOP;
1141 u32 status_P_I = SPU_STATUS_STOPPED_BY_STOP |SPU_STATUS_INVALID_INSTR;
1144 /* Restore, Step 27:
1145 * If the CSA.SPU_Status[I,S,H,P]=1 then add the correct
1146 * instruction sequence to the end of the SPU based restore
1147 * code (after the "context restored" stop and signal) to
1148 * restore the correct SPU status.
1150 * NOTE: Rather than modifying the SPU executable, we
1151 * instead add a new 'stopped_status' field to the
1152 * LSCSA. The SPU-side restore reads this field and
1153 * takes the appropriate action when exiting.
1157 (csa->prob.spu_status_R >> SPU_STOP_STATUS_SHIFT) & 0xFFFF;
1158 if ((csa->prob.spu_status_R & status_P_I) == status_P_I) {
1160 /* SPU_Status[P,I]=1 - Illegal Instruction followed
1161 * by Stop and Signal instruction, followed by 'br -4'.
1164 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_P_I;
1165 csa->lscsa->stopped_status.slot[1] = status_code;
1167 } else if ((csa->prob.spu_status_R & status_P_H) == status_P_H) {
1169 /* SPU_Status[P,H]=1 - Halt Conditional, followed
1170 * by Stop and Signal instruction, followed by
1173 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_P_H;
1174 csa->lscsa->stopped_status.slot[1] = status_code;
1176 } else if ((csa->prob.spu_status_R & status_S_P) == status_S_P) {
1178 /* SPU_Status[S,P]=1 - Stop and Signal instruction
1179 * followed by 'br -4'.
1181 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_S_P;
1182 csa->lscsa->stopped_status.slot[1] = status_code;
1184 } else if ((csa->prob.spu_status_R & status_S_I) == status_S_I) {
1186 /* SPU_Status[S,I]=1 - Illegal instruction followed
1189 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_S_I;
1190 csa->lscsa->stopped_status.slot[1] = status_code;
1192 } else if ((csa->prob.spu_status_R & status_P) == status_P) {
1194 /* SPU_Status[P]=1 - Stop and Signal instruction
1195 * followed by 'br -4'.
1197 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_P;
1198 csa->lscsa->stopped_status.slot[1] = status_code;
1200 } else if ((csa->prob.spu_status_R & status_H) == status_H) {
1202 /* SPU_Status[H]=1 - Halt Conditional, followed
1205 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_H;
1207 } else if ((csa->prob.spu_status_R & status_S) == status_S) {
1209 /* SPU_Status[S]=1 - Two nop instructions.
1211 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_S;
1213 } else if ((csa->prob.spu_status_R & status_I) == status_I) {
1215 /* SPU_Status[I]=1 - Illegal instruction followed
1218 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_I;
1223 static inline void setup_spu_status_part2(struct spu_state *csa,
1228 /* Restore, Step 28:
1229 * If the CSA.SPU_Status[I,S,H,P,R]=0 then
1230 * add a 'br *' instruction to the end of
1231 * the SPU based restore code.
1233 * NOTE: Rather than modifying the SPU executable, we
1234 * instead add a new 'stopped_status' field to the
1235 * LSCSA. The SPU-side restore reads this field and
1236 * takes the appropriate action when exiting.
1238 mask = SPU_STATUS_INVALID_INSTR |
1239 SPU_STATUS_SINGLE_STEP |
1240 SPU_STATUS_STOPPED_BY_HALT |
1241 SPU_STATUS_STOPPED_BY_STOP | SPU_STATUS_RUNNING;
1242 if (!(csa->prob.spu_status_R & mask)) {
1243 csa->lscsa->stopped_status.slot[0] = SPU_STOPPED_STATUS_R;
1247 static inline void restore_mfc_rag(struct spu_state *csa, struct spu *spu)
1249 /* Restore, Step 29:
1250 * Restore RA_GROUP_ID register and the
1251 * RA_ENABLE reigster from the CSA.
1253 spu_resource_allocation_groupID_set(spu,
1254 csa->priv1.resource_allocation_groupID_RW);
1255 spu_resource_allocation_enable_set(spu,
1256 csa->priv1.resource_allocation_enable_RW);
1259 static inline void send_restore_code(struct spu_state *csa, struct spu *spu)
1261 unsigned long addr = (unsigned long)&spu_restore_code[0];
1262 unsigned int ls_offset = 0x0;
1263 unsigned int size = sizeof(spu_restore_code);
1264 unsigned int tag = 0;
1265 unsigned int rclass = 0;
1266 unsigned int cmd = MFC_GETFS_CMD;
1268 /* Restore, Step 37:
1269 * Issue MFC DMA command to copy context
1270 * restore code to local storage.
1272 send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd);
1275 static inline void setup_decr(struct spu_state *csa, struct spu *spu)
1277 /* Restore, Step 34:
1278 * If CSA.MFC_CNTL[Ds]=1 (decrementer was
1279 * running) then adjust decrementer, set
1280 * decrementer running status in LSCSA,
1281 * and set decrementer "wrapped" status
1284 if (csa->priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING) {
1285 cycles_t resume_time = get_cycles();
1286 cycles_t delta_time = resume_time - csa->suspend_time;
1288 csa->lscsa->decr_status.slot[0] = SPU_DECR_STATUS_RUNNING;
1289 if (csa->lscsa->decr.slot[0] < delta_time) {
1290 csa->lscsa->decr_status.slot[0] |=
1291 SPU_DECR_STATUS_WRAPPED;
1294 csa->lscsa->decr.slot[0] -= delta_time;
1296 csa->lscsa->decr_status.slot[0] = 0;
1300 static inline void setup_ppu_mb(struct spu_state *csa, struct spu *spu)
1302 /* Restore, Step 35:
1303 * Copy the CSA.PU_MB data into the LSCSA.
1305 csa->lscsa->ppu_mb.slot[0] = csa->prob.pu_mb_R;
1308 static inline void setup_ppuint_mb(struct spu_state *csa, struct spu *spu)
1310 /* Restore, Step 36:
1311 * Copy the CSA.PUINT_MB data into the LSCSA.
1313 csa->lscsa->ppuint_mb.slot[0] = csa->priv2.puint_mb_R;
1316 static inline int check_restore_status(struct spu_state *csa, struct spu *spu)
1318 struct spu_problem __iomem *prob = spu->problem;
1321 /* Restore, Step 40:
1322 * If SPU_Status[P]=1 and SPU_Status[SC] = "success",
1323 * context restore succeeded, otherwise context restore
1326 complete = ((SPU_RESTORE_COMPLETE << SPU_STOP_STATUS_SHIFT) |
1327 SPU_STATUS_STOPPED_BY_STOP);
1328 return (in_be32(&prob->spu_status_R) != complete) ? 1 : 0;
1331 static inline void restore_spu_privcntl(struct spu_state *csa, struct spu *spu)
1333 struct spu_priv2 __iomem *priv2 = spu->priv2;
1335 /* Restore, Step 41:
1336 * Restore SPU_PrivCntl from the CSA.
1338 out_be64(&priv2->spu_privcntl_RW, csa->priv2.spu_privcntl_RW);
1342 static inline void restore_status_part1(struct spu_state *csa, struct spu *spu)
1344 struct spu_problem __iomem *prob = spu->problem;
1347 /* Restore, Step 42:
1348 * If any CSA.SPU_Status[I,S,H,P]=1, then
1349 * restore the error or single step state.
1351 mask = SPU_STATUS_INVALID_INSTR |
1352 SPU_STATUS_SINGLE_STEP |
1353 SPU_STATUS_STOPPED_BY_HALT | SPU_STATUS_STOPPED_BY_STOP;
1354 if (csa->prob.spu_status_R & mask) {
1355 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE);
1357 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1358 SPU_STATUS_RUNNING);
1362 static inline void restore_status_part2(struct spu_state *csa, struct spu *spu)
1364 struct spu_problem __iomem *prob = spu->problem;
1367 /* Restore, Step 43:
1368 * If all CSA.SPU_Status[I,S,H,P,R]=0 then write
1369 * SPU_RunCntl[R0R1]='01', wait for SPU_Status[R]=1,
1370 * then write '00' to SPU_RunCntl[R0R1] and wait
1371 * for SPU_Status[R]=0.
1373 mask = SPU_STATUS_INVALID_INSTR |
1374 SPU_STATUS_SINGLE_STEP |
1375 SPU_STATUS_STOPPED_BY_HALT |
1376 SPU_STATUS_STOPPED_BY_STOP | SPU_STATUS_RUNNING;
1377 if (!(csa->prob.spu_status_R & mask)) {
1378 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE);
1380 POLL_WHILE_FALSE(in_be32(&prob->spu_status_R) &
1381 SPU_STATUS_RUNNING);
1382 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP);
1384 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) &
1385 SPU_STATUS_RUNNING);
1389 static inline void restore_ls_16kb(struct spu_state *csa, struct spu *spu)
1391 unsigned long addr = (unsigned long)&csa->lscsa->ls[0];
1392 unsigned int ls_offset = 0x0;
1393 unsigned int size = 16384;
1394 unsigned int tag = 0;
1395 unsigned int rclass = 0;
1396 unsigned int cmd = MFC_GET_CMD;
1398 /* Restore, Step 44:
1399 * Issue a DMA command to restore the first
1400 * 16kb of local storage from CSA.
1402 send_mfc_dma(spu, addr, ls_offset, size, tag, rclass, cmd);
1405 static inline void clear_interrupts(struct spu_state *csa, struct spu *spu)
1407 /* Restore, Step 49:
1408 * Write INT_MASK_class0 with value of 0.
1409 * Write INT_MASK_class1 with value of 0.
1410 * Write INT_MASK_class2 with value of 0.
1411 * Write INT_STAT_class0 with value of -1.
1412 * Write INT_STAT_class1 with value of -1.
1413 * Write INT_STAT_class2 with value of -1.
1415 spin_lock_irq(&spu->register_lock);
1416 spu_int_mask_set(spu, 0, 0ul);
1417 spu_int_mask_set(spu, 1, 0ul);
1418 spu_int_mask_set(spu, 2, 0ul);
1419 spu_int_stat_clear(spu, 0, ~0ul);
1420 spu_int_stat_clear(spu, 1, ~0ul);
1421 spu_int_stat_clear(spu, 2, ~0ul);
1422 spin_unlock_irq(&spu->register_lock);
1425 static inline void restore_mfc_queues(struct spu_state *csa, struct spu *spu)
1427 struct spu_priv2 __iomem *priv2 = spu->priv2;
1430 /* Restore, Step 50:
1431 * If MFC_Cntl[Se]!=0 then restore
1432 * MFC command queues.
1434 if ((csa->priv2.mfc_control_RW & MFC_CNTL_DMA_QUEUES_EMPTY_MASK) == 0) {
1435 for (i = 0; i < 8; i++) {
1436 out_be64(&priv2->puq[i].mfc_cq_data0_RW,
1437 csa->priv2.puq[i].mfc_cq_data0_RW);
1438 out_be64(&priv2->puq[i].mfc_cq_data1_RW,
1439 csa->priv2.puq[i].mfc_cq_data1_RW);
1440 out_be64(&priv2->puq[i].mfc_cq_data2_RW,
1441 csa->priv2.puq[i].mfc_cq_data2_RW);
1442 out_be64(&priv2->puq[i].mfc_cq_data3_RW,
1443 csa->priv2.puq[i].mfc_cq_data3_RW);
1445 for (i = 0; i < 16; i++) {
1446 out_be64(&priv2->spuq[i].mfc_cq_data0_RW,
1447 csa->priv2.spuq[i].mfc_cq_data0_RW);
1448 out_be64(&priv2->spuq[i].mfc_cq_data1_RW,
1449 csa->priv2.spuq[i].mfc_cq_data1_RW);
1450 out_be64(&priv2->spuq[i].mfc_cq_data2_RW,
1451 csa->priv2.spuq[i].mfc_cq_data2_RW);
1452 out_be64(&priv2->spuq[i].mfc_cq_data3_RW,
1453 csa->priv2.spuq[i].mfc_cq_data3_RW);
1459 static inline void restore_ppu_querymask(struct spu_state *csa, struct spu *spu)
1461 struct spu_problem __iomem *prob = spu->problem;
1463 /* Restore, Step 51:
1464 * Restore the PPU_QueryMask register from CSA.
1466 out_be32(&prob->dma_querymask_RW, csa->prob.dma_querymask_RW);
1470 static inline void restore_ppu_querytype(struct spu_state *csa, struct spu *spu)
1472 struct spu_problem __iomem *prob = spu->problem;
1474 /* Restore, Step 52:
1475 * Restore the PPU_QueryType register from CSA.
1477 out_be32(&prob->dma_querytype_RW, csa->prob.dma_querytype_RW);
1481 static inline void restore_mfc_csr_tsq(struct spu_state *csa, struct spu *spu)
1483 struct spu_priv2 __iomem *priv2 = spu->priv2;
1485 /* Restore, Step 53:
1486 * Restore the MFC_CSR_TSQ register from CSA.
1488 out_be64(&priv2->spu_tag_status_query_RW,
1489 csa->priv2.spu_tag_status_query_RW);
1493 static inline void restore_mfc_csr_cmd(struct spu_state *csa, struct spu *spu)
1495 struct spu_priv2 __iomem *priv2 = spu->priv2;
1497 /* Restore, Step 54:
1498 * Restore the MFC_CSR_CMD1 and MFC_CSR_CMD2
1499 * registers from CSA.
1501 out_be64(&priv2->spu_cmd_buf1_RW, csa->priv2.spu_cmd_buf1_RW);
1502 out_be64(&priv2->spu_cmd_buf2_RW, csa->priv2.spu_cmd_buf2_RW);
1506 static inline void restore_mfc_csr_ato(struct spu_state *csa, struct spu *spu)
1508 struct spu_priv2 __iomem *priv2 = spu->priv2;
1510 /* Restore, Step 55:
1511 * Restore the MFC_CSR_ATO register from CSA.
1513 out_be64(&priv2->spu_atomic_status_RW, csa->priv2.spu_atomic_status_RW);
1516 static inline void restore_mfc_tclass_id(struct spu_state *csa, struct spu *spu)
1518 /* Restore, Step 56:
1519 * Restore the MFC_TCLASS_ID register from CSA.
1521 spu_mfc_tclass_id_set(spu, csa->priv1.mfc_tclass_id_RW);
1525 static inline void set_llr_event(struct spu_state *csa, struct spu *spu)
1527 u64 ch0_cnt, ch0_data;
1530 /* Restore, Step 57:
1531 * Set the Lock Line Reservation Lost Event by:
1532 * 1. OR CSA.SPU_Event_Status with bit 21 (Lr) set to 1.
1533 * 2. If CSA.SPU_Channel_0_Count=0 and
1534 * CSA.SPU_Wr_Event_Mask[Lr]=1 and
1535 * CSA.SPU_Event_Status[Lr]=0 then set
1536 * CSA.SPU_Event_Status_Count=1.
1538 ch0_cnt = csa->spu_chnlcnt_RW[0];
1539 ch0_data = csa->spu_chnldata_RW[0];
1540 ch1_data = csa->spu_chnldata_RW[1];
1541 csa->spu_chnldata_RW[0] |= MFC_LLR_LOST_EVENT;
1542 if ((ch0_cnt == 0) && !(ch0_data & MFC_LLR_LOST_EVENT) &&
1543 (ch1_data & MFC_LLR_LOST_EVENT)) {
1544 csa->spu_chnlcnt_RW[0] = 1;
1548 static inline void restore_decr_wrapped(struct spu_state *csa, struct spu *spu)
1550 /* Restore, Step 58:
1551 * If the status of the CSA software decrementer
1552 * "wrapped" flag is set, OR in a '1' to
1553 * CSA.SPU_Event_Status[Tm].
1555 if (csa->lscsa->decr_status.slot[0] & SPU_DECR_STATUS_WRAPPED) {
1556 csa->spu_chnldata_RW[0] |= 0x20;
1558 if ((csa->lscsa->decr_status.slot[0] & SPU_DECR_STATUS_WRAPPED) &&
1559 (csa->spu_chnlcnt_RW[0] == 0 &&
1560 ((csa->spu_chnldata_RW[2] & 0x20) == 0x0) &&
1561 ((csa->spu_chnldata_RW[0] & 0x20) != 0x1))) {
1562 csa->spu_chnlcnt_RW[0] = 1;
1566 static inline void restore_ch_part1(struct spu_state *csa, struct spu *spu)
1568 struct spu_priv2 __iomem *priv2 = spu->priv2;
1569 u64 idx, ch_indices[] = { 0UL, 3UL, 4UL, 24UL, 25UL, 27UL };
1572 /* Restore, Step 59:
1573 * Restore the following CH: [0,3,4,24,25,27]
1575 for (i = 0; i < ARRAY_SIZE(ch_indices); i++) {
1576 idx = ch_indices[i];
1577 out_be64(&priv2->spu_chnlcntptr_RW, idx);
1579 out_be64(&priv2->spu_chnldata_RW, csa->spu_chnldata_RW[idx]);
1580 out_be64(&priv2->spu_chnlcnt_RW, csa->spu_chnlcnt_RW[idx]);
1585 static inline void restore_ch_part2(struct spu_state *csa, struct spu *spu)
1587 struct spu_priv2 __iomem *priv2 = spu->priv2;
1588 u64 ch_indices[3] = { 9UL, 21UL, 23UL };
1589 u64 ch_counts[3] = { 1UL, 16UL, 1UL };
1593 /* Restore, Step 60:
1594 * Restore the following CH: [9,21,23].
1597 ch_counts[1] = csa->spu_chnlcnt_RW[21];
1599 for (i = 0; i < 3; i++) {
1600 idx = ch_indices[i];
1601 out_be64(&priv2->spu_chnlcntptr_RW, idx);
1603 out_be64(&priv2->spu_chnlcnt_RW, ch_counts[i]);
1608 static inline void restore_spu_lslr(struct spu_state *csa, struct spu *spu)
1610 struct spu_priv2 __iomem *priv2 = spu->priv2;
1612 /* Restore, Step 61:
1613 * Restore the SPU_LSLR register from CSA.
1615 out_be64(&priv2->spu_lslr_RW, csa->priv2.spu_lslr_RW);
1619 static inline void restore_spu_cfg(struct spu_state *csa, struct spu *spu)
1621 struct spu_priv2 __iomem *priv2 = spu->priv2;
1623 /* Restore, Step 62:
1624 * Restore the SPU_Cfg register from CSA.
1626 out_be64(&priv2->spu_cfg_RW, csa->priv2.spu_cfg_RW);
1630 static inline void restore_pm_trace(struct spu_state *csa, struct spu *spu)
1632 /* Restore, Step 63:
1633 * Restore PM_Trace_Tag_Wait_Mask from CSA.
1634 * Not performed by this implementation.
1638 static inline void restore_spu_npc(struct spu_state *csa, struct spu *spu)
1640 struct spu_problem __iomem *prob = spu->problem;
1642 /* Restore, Step 64:
1643 * Restore SPU_NPC from CSA.
1645 out_be32(&prob->spu_npc_RW, csa->prob.spu_npc_RW);
1649 static inline void restore_spu_mb(struct spu_state *csa, struct spu *spu)
1651 struct spu_priv2 __iomem *priv2 = spu->priv2;
1654 /* Restore, Step 65:
1655 * Restore MFC_RdSPU_MB from CSA.
1657 out_be64(&priv2->spu_chnlcntptr_RW, 29UL);
1659 out_be64(&priv2->spu_chnlcnt_RW, csa->spu_chnlcnt_RW[29]);
1660 for (i = 0; i < 4; i++) {
1661 out_be64(&priv2->spu_chnldata_RW, csa->spu_mailbox_data[i]);
1666 static inline void check_ppu_mb_stat(struct spu_state *csa, struct spu *spu)
1668 struct spu_problem __iomem *prob = spu->problem;
1671 /* Restore, Step 66:
1672 * If CSA.MB_Stat[P]=0 (mailbox empty) then
1673 * read from the PPU_MB register.
1675 if ((csa->prob.mb_stat_R & 0xFF) == 0) {
1676 dummy = in_be32(&prob->pu_mb_R);
1681 static inline void check_ppuint_mb_stat(struct spu_state *csa, struct spu *spu)
1683 struct spu_priv2 __iomem *priv2 = spu->priv2;
1686 /* Restore, Step 66:
1687 * If CSA.MB_Stat[I]=0 (mailbox empty) then
1688 * read from the PPUINT_MB register.
1690 if ((csa->prob.mb_stat_R & 0xFF0000) == 0) {
1691 dummy = in_be64(&priv2->puint_mb_R);
1693 spu_int_stat_clear(spu, 2, CLASS2_ENABLE_MAILBOX_INTR);
1698 static inline void restore_mfc_sr1(struct spu_state *csa, struct spu *spu)
1700 /* Restore, Step 69:
1701 * Restore the MFC_SR1 register from CSA.
1703 spu_mfc_sr1_set(spu, csa->priv1.mfc_sr1_RW);
1707 static inline void restore_other_spu_access(struct spu_state *csa,
1710 /* Restore, Step 70:
1711 * Restore other SPU mappings to this SPU. TBD.
1715 static inline void restore_spu_runcntl(struct spu_state *csa, struct spu *spu)
1717 struct spu_problem __iomem *prob = spu->problem;
1719 /* Restore, Step 71:
1720 * If CSA.SPU_Status[R]=1 then write
1721 * SPU_RunCntl[R0R1]='01'.
1723 if (csa->prob.spu_status_R & SPU_STATUS_RUNNING) {
1724 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE);
1729 static inline void restore_mfc_cntl(struct spu_state *csa, struct spu *spu)
1731 struct spu_priv2 __iomem *priv2 = spu->priv2;
1733 /* Restore, Step 72:
1734 * Restore the MFC_CNTL register for the CSA.
1736 out_be64(&priv2->mfc_control_RW, csa->priv2.mfc_control_RW);
1739 * FIXME: this is to restart a DMA that we were processing
1740 * before the save. better remember the fault information
1741 * in the csa instead.
1743 if ((csa->priv2.mfc_control_RW & MFC_CNTL_SUSPEND_DMA_QUEUE_MASK)) {
1744 out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
1749 static inline void enable_user_access(struct spu_state *csa, struct spu *spu)
1751 /* Restore, Step 73:
1752 * Enable user-space access (if provided) to this
1753 * SPU by mapping the virtual pages assigned to
1754 * the SPU memory-mapped I/O (MMIO) for problem
1759 static inline void reset_switch_active(struct spu_state *csa, struct spu *spu)
1761 /* Restore, Step 74:
1762 * Reset the "context switch active" flag.
1764 clear_bit(SPU_CONTEXT_SWITCH_ACTIVE, &spu->flags);
1768 static inline void reenable_interrupts(struct spu_state *csa, struct spu *spu)
1770 /* Restore, Step 75:
1771 * Re-enable SPU interrupts.
1773 spin_lock_irq(&spu->register_lock);
1774 spu_int_mask_set(spu, 0, csa->priv1.int_mask_class0_RW);
1775 spu_int_mask_set(spu, 1, csa->priv1.int_mask_class1_RW);
1776 spu_int_mask_set(spu, 2, csa->priv1.int_mask_class2_RW);
1777 spin_unlock_irq(&spu->register_lock);
1780 static int quiece_spu(struct spu_state *prev, struct spu *spu)
1783 * Combined steps 2-18 of SPU context save sequence, which
1784 * quiesce the SPU state (disable SPU execution, MFC command
1785 * queues, decrementer, SPU interrupts, etc.).
1787 * Returns 0 on success.
1788 * 2 if failed step 2.
1789 * 6 if failed step 6.
1792 if (check_spu_isolate(prev, spu)) { /* Step 2. */
1795 disable_interrupts(prev, spu); /* Step 3. */
1796 set_watchdog_timer(prev, spu); /* Step 4. */
1797 inhibit_user_access(prev, spu); /* Step 5. */
1798 if (check_spu_isolate(prev, spu)) { /* Step 6. */
1801 set_switch_pending(prev, spu); /* Step 7. */
1802 save_mfc_cntl(prev, spu); /* Step 8. */
1803 save_spu_runcntl(prev, spu); /* Step 9. */
1804 save_mfc_sr1(prev, spu); /* Step 10. */
1805 save_spu_status(prev, spu); /* Step 11. */
1806 save_mfc_decr(prev, spu); /* Step 12. */
1807 halt_mfc_decr(prev, spu); /* Step 13. */
1808 save_timebase(prev, spu); /* Step 14. */
1809 remove_other_spu_access(prev, spu); /* Step 15. */
1810 do_mfc_mssync(prev, spu); /* Step 16. */
1811 issue_mfc_tlbie(prev, spu); /* Step 17. */
1812 handle_pending_interrupts(prev, spu); /* Step 18. */
1817 static void save_csa(struct spu_state *prev, struct spu *spu)
1820 * Combine steps 19-44 of SPU context save sequence, which
1821 * save regions of the privileged & problem state areas.
1824 save_mfc_queues(prev, spu); /* Step 19. */
1825 save_ppu_querymask(prev, spu); /* Step 20. */
1826 save_ppu_querytype(prev, spu); /* Step 21. */
1827 save_ppu_tagstatus(prev, spu); /* NEW. */
1828 save_mfc_csr_tsq(prev, spu); /* Step 22. */
1829 save_mfc_csr_cmd(prev, spu); /* Step 23. */
1830 save_mfc_csr_ato(prev, spu); /* Step 24. */
1831 save_mfc_tclass_id(prev, spu); /* Step 25. */
1832 set_mfc_tclass_id(prev, spu); /* Step 26. */
1833 purge_mfc_queue(prev, spu); /* Step 27. */
1834 wait_purge_complete(prev, spu); /* Step 28. */
1835 setup_mfc_sr1(prev, spu); /* Step 30. */
1836 save_spu_npc(prev, spu); /* Step 31. */
1837 save_spu_privcntl(prev, spu); /* Step 32. */
1838 reset_spu_privcntl(prev, spu); /* Step 33. */
1839 save_spu_lslr(prev, spu); /* Step 34. */
1840 reset_spu_lslr(prev, spu); /* Step 35. */
1841 save_spu_cfg(prev, spu); /* Step 36. */
1842 save_pm_trace(prev, spu); /* Step 37. */
1843 save_mfc_rag(prev, spu); /* Step 38. */
1844 save_ppu_mb_stat(prev, spu); /* Step 39. */
1845 save_ppu_mb(prev, spu); /* Step 40. */
1846 save_ppuint_mb(prev, spu); /* Step 41. */
1847 save_ch_part1(prev, spu); /* Step 42. */
1848 save_spu_mb(prev, spu); /* Step 43. */
1849 save_mfc_cmd(prev, spu); /* Step 44. */
1850 reset_ch(prev, spu); /* Step 45. */
1853 static void save_lscsa(struct spu_state *prev, struct spu *spu)
1856 * Perform steps 46-57 of SPU context save sequence,
1857 * which save regions of the local store and register
1861 resume_mfc_queue(prev, spu); /* Step 46. */
1862 setup_mfc_slbs(prev, spu); /* Step 47. */
1863 set_switch_active(prev, spu); /* Step 48. */
1864 enable_interrupts(prev, spu); /* Step 49. */
1865 save_ls_16kb(prev, spu); /* Step 50. */
1866 set_spu_npc(prev, spu); /* Step 51. */
1867 set_signot1(prev, spu); /* Step 52. */
1868 set_signot2(prev, spu); /* Step 53. */
1869 send_save_code(prev, spu); /* Step 54. */
1870 set_ppu_querymask(prev, spu); /* Step 55. */
1871 wait_tag_complete(prev, spu); /* Step 56. */
1872 wait_spu_stopped(prev, spu); /* Step 57. */
1875 static void force_spu_isolate_exit(struct spu *spu)
1877 struct spu_problem __iomem *prob = spu->problem;
1878 struct spu_priv2 __iomem *priv2 = spu->priv2;
1880 /* Stop SPE execution and wait for completion. */
1881 out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP);
1883 POLL_WHILE_TRUE(in_be32(&prob->spu_status_R) & SPU_STATUS_RUNNING);
1885 /* Restart SPE master runcntl. */
1886 spu_mfc_sr1_set(spu, MFC_STATE1_MASTER_RUN_CONTROL_MASK);
1889 /* Initiate isolate exit request and wait for completion. */
1890 out_be64(&priv2->spu_privcntl_RW, 4LL);
1892 out_be32(&prob->spu_runcntl_RW, 2);
1894 POLL_WHILE_FALSE((in_be32(&prob->spu_status_R)
1895 & SPU_STATUS_STOPPED_BY_STOP));
1897 /* Reset load request to normal. */
1898 out_be64(&priv2->spu_privcntl_RW, SPU_PRIVCNT_LOAD_REQUEST_NORMAL);
1904 * Check SPU run-control state and force isolated
1905 * exit function as necessary.
1907 static void stop_spu_isolate(struct spu *spu)
1909 struct spu_problem __iomem *prob = spu->problem;
1911 if (in_be32(&prob->spu_status_R) & SPU_STATUS_ISOLATED_STATE) {
1912 /* The SPU is in isolated state; the only way
1913 * to get it out is to perform an isolated
1914 * exit (clean) operation.
1916 force_spu_isolate_exit(spu);
1920 static void harvest(struct spu_state *prev, struct spu *spu)
1923 * Perform steps 2-25 of SPU context restore sequence,
1924 * which resets an SPU either after a failed save, or
1925 * when using SPU for first time.
1928 disable_interrupts(prev, spu); /* Step 2. */
1929 inhibit_user_access(prev, spu); /* Step 3. */
1930 terminate_spu_app(prev, spu); /* Step 4. */
1931 set_switch_pending(prev, spu); /* Step 5. */
1932 stop_spu_isolate(spu); /* NEW. */
1933 remove_other_spu_access(prev, spu); /* Step 6. */
1934 suspend_mfc(prev, spu); /* Step 7. */
1935 wait_suspend_mfc_complete(prev, spu); /* Step 8. */
1936 if (!suspend_spe(prev, spu)) /* Step 9. */
1937 clear_spu_status(prev, spu); /* Step 10. */
1938 do_mfc_mssync(prev, spu); /* Step 11. */
1939 issue_mfc_tlbie(prev, spu); /* Step 12. */
1940 handle_pending_interrupts(prev, spu); /* Step 13. */
1941 purge_mfc_queue(prev, spu); /* Step 14. */
1942 wait_purge_complete(prev, spu); /* Step 15. */
1943 reset_spu_privcntl(prev, spu); /* Step 16. */
1944 reset_spu_lslr(prev, spu); /* Step 17. */
1945 setup_mfc_sr1(prev, spu); /* Step 18. */
1946 spu_invalidate_slbs(spu); /* Step 19. */
1947 reset_ch_part1(prev, spu); /* Step 20. */
1948 reset_ch_part2(prev, spu); /* Step 21. */
1949 enable_interrupts(prev, spu); /* Step 22. */
1950 set_switch_active(prev, spu); /* Step 23. */
1951 set_mfc_tclass_id(prev, spu); /* Step 24. */
1952 resume_mfc_queue(prev, spu); /* Step 25. */
1955 static void restore_lscsa(struct spu_state *next, struct spu *spu)
1958 * Perform steps 26-40 of SPU context restore sequence,
1959 * which restores regions of the local store and register
1963 set_watchdog_timer(next, spu); /* Step 26. */
1964 setup_spu_status_part1(next, spu); /* Step 27. */
1965 setup_spu_status_part2(next, spu); /* Step 28. */
1966 restore_mfc_rag(next, spu); /* Step 29. */
1967 setup_mfc_slbs(next, spu); /* Step 30. */
1968 set_spu_npc(next, spu); /* Step 31. */
1969 set_signot1(next, spu); /* Step 32. */
1970 set_signot2(next, spu); /* Step 33. */
1971 setup_decr(next, spu); /* Step 34. */
1972 setup_ppu_mb(next, spu); /* Step 35. */
1973 setup_ppuint_mb(next, spu); /* Step 36. */
1974 send_restore_code(next, spu); /* Step 37. */
1975 set_ppu_querymask(next, spu); /* Step 38. */
1976 wait_tag_complete(next, spu); /* Step 39. */
1977 wait_spu_stopped(next, spu); /* Step 40. */
1980 static void restore_csa(struct spu_state *next, struct spu *spu)
1983 * Combine steps 41-76 of SPU context restore sequence, which
1984 * restore regions of the privileged & problem state areas.
1987 restore_spu_privcntl(next, spu); /* Step 41. */
1988 restore_status_part1(next, spu); /* Step 42. */
1989 restore_status_part2(next, spu); /* Step 43. */
1990 restore_ls_16kb(next, spu); /* Step 44. */
1991 wait_tag_complete(next, spu); /* Step 45. */
1992 suspend_mfc(next, spu); /* Step 46. */
1993 wait_suspend_mfc_complete(next, spu); /* Step 47. */
1994 issue_mfc_tlbie(next, spu); /* Step 48. */
1995 clear_interrupts(next, spu); /* Step 49. */
1996 restore_mfc_queues(next, spu); /* Step 50. */
1997 restore_ppu_querymask(next, spu); /* Step 51. */
1998 restore_ppu_querytype(next, spu); /* Step 52. */
1999 restore_mfc_csr_tsq(next, spu); /* Step 53. */
2000 restore_mfc_csr_cmd(next, spu); /* Step 54. */
2001 restore_mfc_csr_ato(next, spu); /* Step 55. */
2002 restore_mfc_tclass_id(next, spu); /* Step 56. */
2003 set_llr_event(next, spu); /* Step 57. */
2004 restore_decr_wrapped(next, spu); /* Step 58. */
2005 restore_ch_part1(next, spu); /* Step 59. */
2006 restore_ch_part2(next, spu); /* Step 60. */
2007 restore_spu_lslr(next, spu); /* Step 61. */
2008 restore_spu_cfg(next, spu); /* Step 62. */
2009 restore_pm_trace(next, spu); /* Step 63. */
2010 restore_spu_npc(next, spu); /* Step 64. */
2011 restore_spu_mb(next, spu); /* Step 65. */
2012 check_ppu_mb_stat(next, spu); /* Step 66. */
2013 check_ppuint_mb_stat(next, spu); /* Step 67. */
2014 spu_invalidate_slbs(spu); /* Modified Step 68. */
2015 restore_mfc_sr1(next, spu); /* Step 69. */
2016 restore_other_spu_access(next, spu); /* Step 70. */
2017 restore_spu_runcntl(next, spu); /* Step 71. */
2018 restore_mfc_cntl(next, spu); /* Step 72. */
2019 enable_user_access(next, spu); /* Step 73. */
2020 reset_switch_active(next, spu); /* Step 74. */
2021 reenable_interrupts(next, spu); /* Step 75. */
2024 static int __do_spu_save(struct spu_state *prev, struct spu *spu)
2029 * SPU context save can be broken into three phases:
2031 * (a) quiesce [steps 2-16].
2032 * (b) save of CSA, performed by PPE [steps 17-42]
2033 * (c) save of LSCSA, mostly performed by SPU [steps 43-52].
2035 * Returns 0 on success.
2036 * 2,6 if failed to quiece SPU
2037 * 53 if SPU-side of save failed.
2040 rc = quiece_spu(prev, spu); /* Steps 2-16. */
2051 save_csa(prev, spu); /* Steps 17-43. */
2052 save_lscsa(prev, spu); /* Steps 44-53. */
2053 return check_save_status(prev, spu); /* Step 54. */
2056 static int __do_spu_restore(struct spu_state *next, struct spu *spu)
2061 * SPU context restore can be broken into three phases:
2063 * (a) harvest (or reset) SPU [steps 2-24].
2064 * (b) restore LSCSA [steps 25-40], mostly performed by SPU.
2065 * (c) restore CSA [steps 41-76], performed by PPE.
2067 * The 'harvest' step is not performed here, but rather
2071 restore_lscsa(next, spu); /* Steps 24-39. */
2072 rc = check_restore_status(next, spu); /* Step 40. */
2075 /* Failed. Return now. */
2079 /* Fall through to next step. */
2082 restore_csa(next, spu);
2088 * spu_save - SPU context save, with locking.
2089 * @prev: pointer to SPU context save area, to be saved.
2090 * @spu: pointer to SPU iomem structure.
2092 * Acquire locks, perform the save operation then return.
2094 int spu_save(struct spu_state *prev, struct spu *spu)
2098 acquire_spu_lock(spu); /* Step 1. */
2099 prev->dar = spu->dar;
2100 prev->dsisr = spu->dsisr;
2103 rc = __do_spu_save(prev, spu); /* Steps 2-53. */
2104 release_spu_lock(spu);
2105 if (rc != 0 && rc != 2 && rc != 6) {
2106 panic("%s failed on SPU[%d], rc=%d.\n",
2107 __func__, spu->number, rc);
2111 EXPORT_SYMBOL_GPL(spu_save);
2114 * spu_restore - SPU context restore, with harvest and locking.
2115 * @new: pointer to SPU context save area, to be restored.
2116 * @spu: pointer to SPU iomem structure.
2118 * Perform harvest + restore, as we may not be coming
2119 * from a previous successful save operation, and the
2120 * hardware state is unknown.
2122 int spu_restore(struct spu_state *new, struct spu *spu)
2126 acquire_spu_lock(spu);
2128 spu->slb_replace = 0;
2131 spu->class_0_pending = 0;
2132 rc = __do_spu_restore(new, spu);
2133 release_spu_lock(spu);
2135 panic("%s failed on SPU[%d] rc=%d.\n",
2136 __func__, spu->number, rc);
2140 EXPORT_SYMBOL_GPL(spu_restore);
2143 * spu_harvest - SPU harvest (reset) operation
2144 * @spu: pointer to SPU iomem structure.
2146 * Perform SPU harvest (reset) operation.
2148 void spu_harvest(struct spu *spu)
2150 acquire_spu_lock(spu);
2152 release_spu_lock(spu);
2155 static void init_prob(struct spu_state *csa)
2157 csa->spu_chnlcnt_RW[9] = 1;
2158 csa->spu_chnlcnt_RW[21] = 16;
2159 csa->spu_chnlcnt_RW[23] = 1;
2160 csa->spu_chnlcnt_RW[28] = 1;
2161 csa->spu_chnlcnt_RW[30] = 1;
2162 csa->prob.spu_runcntl_RW = SPU_RUNCNTL_STOP;
2163 csa->prob.mb_stat_R = 0x000400;
2166 static void init_priv1(struct spu_state *csa)
2168 /* Enable decode, relocate, tlbie response, master runcntl. */
2169 csa->priv1.mfc_sr1_RW = MFC_STATE1_LOCAL_STORAGE_DECODE_MASK |
2170 MFC_STATE1_MASTER_RUN_CONTROL_MASK |
2171 MFC_STATE1_PROBLEM_STATE_MASK |
2172 MFC_STATE1_RELOCATE_MASK | MFC_STATE1_BUS_TLBIE_MASK;
2174 /* Enable OS-specific set of interrupts. */
2175 csa->priv1.int_mask_class0_RW = CLASS0_ENABLE_DMA_ALIGNMENT_INTR |
2176 CLASS0_ENABLE_INVALID_DMA_COMMAND_INTR |
2177 CLASS0_ENABLE_SPU_ERROR_INTR;
2178 csa->priv1.int_mask_class1_RW = CLASS1_ENABLE_SEGMENT_FAULT_INTR |
2179 CLASS1_ENABLE_STORAGE_FAULT_INTR;
2180 csa->priv1.int_mask_class2_RW = CLASS2_ENABLE_SPU_STOP_INTR |
2181 CLASS2_ENABLE_SPU_HALT_INTR |
2182 CLASS2_ENABLE_SPU_DMA_TAG_GROUP_COMPLETE_INTR;
2185 static void init_priv2(struct spu_state *csa)
2187 csa->priv2.spu_lslr_RW = LS_ADDR_MASK;
2188 csa->priv2.mfc_control_RW = MFC_CNTL_RESUME_DMA_QUEUE |
2189 MFC_CNTL_NORMAL_DMA_QUEUE_OPERATION |
2190 MFC_CNTL_DMA_QUEUES_EMPTY_MASK;
2194 * spu_alloc_csa - allocate and initialize an SPU context save area.
2196 * Allocate and initialize the contents of an SPU context save area.
2197 * This includes enabling address translation, interrupt masks, etc.,
2198 * as appropriate for the given OS environment.
2200 * Note that storage for the 'lscsa' is allocated separately,
2201 * as it is by far the largest of the context save regions,
2202 * and may need to be pinned or otherwise specially aligned.
2204 int spu_init_csa(struct spu_state *csa)
2210 memset(csa, 0, sizeof(struct spu_state));
2212 rc = spu_alloc_lscsa(csa);
2216 spin_lock_init(&csa->register_lock);
2224 EXPORT_SYMBOL_GPL(spu_init_csa);
2226 void spu_fini_csa(struct spu_state *csa)
2228 spu_free_lscsa(csa);
2230 EXPORT_SYMBOL_GPL(spu_fini_csa);