7c038749d1
This adds the code needed to perform a context switch from spufs, following the recommended 76-step sequence. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
255 lines
6.6 KiB
C
255 lines
6.6 KiB
C
/*
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* spu_csa.h: Definitions for SPU context save area (CSA).
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*
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* (C) Copyright IBM 2005
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*
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* Author: Mark Nutter <mnutter@us.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _SPU_CSA_H_
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#define _SPU_CSA_H_
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/*
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* Total number of 128-bit registers.
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*/
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#define NR_SPU_GPRS 128
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#define NR_SPU_SPRS 9
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#define NR_SPU_REGS_PAD 7
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#define NR_SPU_SPILL_REGS 144 /* GPRS + SPRS + PAD */
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#define SIZEOF_SPU_SPILL_REGS NR_SPU_SPILL_REGS * 16
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#define SPU_SAVE_COMPLETE 0x3FFB
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#define SPU_RESTORE_COMPLETE 0x3FFC
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/*
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* Definitions for various 'stopped' status conditions,
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* to be recreated during context restore.
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*/
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#define SPU_STOPPED_STATUS_P 1
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#define SPU_STOPPED_STATUS_I 2
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#define SPU_STOPPED_STATUS_H 3
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#define SPU_STOPPED_STATUS_S 4
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#define SPU_STOPPED_STATUS_S_I 5
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#define SPU_STOPPED_STATUS_S_P 6
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#define SPU_STOPPED_STATUS_P_H 7
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#define SPU_STOPPED_STATUS_P_I 8
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#define SPU_STOPPED_STATUS_R 9
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#ifndef __ASSEMBLY__
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/**
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* spu_reg128 - generic 128-bit register definition.
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*/
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struct spu_reg128 {
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u32 slot[4];
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};
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/**
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* struct spu_lscsa - Local Store Context Save Area.
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* @gprs: Array of saved registers.
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* @fpcr: Saved floating point status control register.
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* @decr: Saved decrementer value.
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* @decr_status: Indicates decrementer run status.
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* @ppu_mb: Saved PPU mailbox data.
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* @ppuint_mb: Saved PPU interrupting mailbox data.
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* @tag_mask: Saved tag group mask.
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* @event_mask: Saved event mask.
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* @srr0: Saved SRR0.
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* @stopped_status: Conditions to be recreated by restore.
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* @ls: Saved contents of Local Storage Area.
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*
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* The LSCSA represents state that is primarily saved and
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* restored by SPU-side code.
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*/
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struct spu_lscsa {
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struct spu_reg128 gprs[128];
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struct spu_reg128 fpcr;
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struct spu_reg128 decr;
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struct spu_reg128 decr_status;
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struct spu_reg128 ppu_mb;
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struct spu_reg128 ppuint_mb;
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struct spu_reg128 tag_mask;
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struct spu_reg128 event_mask;
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struct spu_reg128 srr0;
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struct spu_reg128 stopped_status;
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struct spu_reg128 pad[119]; /* 'ls' must be page-aligned. */
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unsigned char ls[LS_SIZE];
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};
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#ifdef __KERNEL__
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/*
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* struct spu_problem_collapsed - condensed problem state area, w/o pads.
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*/
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struct spu_problem_collapsed {
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u64 spc_mssync_RW;
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u32 mfc_lsa_W;
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u32 unused_pad0;
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u64 mfc_ea_W;
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union mfc_tag_size_class_cmd mfc_union_W;
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u32 dma_qstatus_R;
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u32 dma_querytype_RW;
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u32 dma_querymask_RW;
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u32 dma_tagstatus_R;
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u32 pu_mb_R;
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u32 spu_mb_W;
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u32 mb_stat_R;
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u32 spu_runcntl_RW;
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u32 spu_status_R;
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u32 spu_spc_R;
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u32 spu_npc_RW;
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u32 signal_notify1;
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u32 signal_notify2;
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u32 unused_pad1;
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};
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/*
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* struct spu_priv1_collapsed - condensed privileged 1 area, w/o pads.
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*/
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struct spu_priv1_collapsed {
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u64 mfc_sr1_RW;
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u64 mfc_lpid_RW;
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u64 spu_idr_RW;
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u64 mfc_vr_RO;
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u64 spu_vr_RO;
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u64 int_mask_class0_RW;
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u64 int_mask_class1_RW;
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u64 int_mask_class2_RW;
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u64 int_stat_class0_RW;
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u64 int_stat_class1_RW;
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u64 int_stat_class2_RW;
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u64 int_route_RW;
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u64 mfc_atomic_flush_RW;
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u64 resource_allocation_groupID_RW;
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u64 resource_allocation_enable_RW;
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u64 mfc_fir_R;
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u64 mfc_fir_status_or_W;
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u64 mfc_fir_status_and_W;
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u64 mfc_fir_mask_R;
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u64 mfc_fir_mask_or_W;
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u64 mfc_fir_mask_and_W;
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u64 mfc_fir_chkstp_enable_RW;
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u64 smf_sbi_signal_sel;
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u64 smf_ato_signal_sel;
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u64 mfc_sdr_RW;
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u64 tlb_index_hint_RO;
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u64 tlb_index_W;
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u64 tlb_vpn_RW;
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u64 tlb_rpn_RW;
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u64 tlb_invalidate_entry_W;
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u64 tlb_invalidate_all_W;
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u64 smm_hid;
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u64 mfc_accr_RW;
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u64 mfc_dsisr_RW;
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u64 mfc_dar_RW;
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u64 rmt_index_RW;
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u64 rmt_data1_RW;
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u64 mfc_dsir_R;
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u64 mfc_lsacr_RW;
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u64 mfc_lscrr_R;
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u64 mfc_tclass_id_RW;
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u64 mfc_rm_boundary;
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u64 smf_dma_signal_sel;
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u64 smm_signal_sel;
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u64 mfc_cer_R;
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u64 pu_ecc_cntl_RW;
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u64 pu_ecc_stat_RW;
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u64 spu_ecc_addr_RW;
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u64 spu_err_mask_RW;
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u64 spu_trig0_sel;
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u64 spu_trig1_sel;
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u64 spu_trig2_sel;
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u64 spu_trig3_sel;
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u64 spu_trace_sel;
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u64 spu_event0_sel;
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u64 spu_event1_sel;
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u64 spu_event2_sel;
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u64 spu_event3_sel;
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u64 spu_trace_cntl;
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};
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/*
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* struct spu_priv2_collapsed - condensed priviliged 2 area, w/o pads.
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*/
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struct spu_priv2_collapsed {
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u64 slb_index_W;
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u64 slb_esid_RW;
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u64 slb_vsid_RW;
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u64 slb_invalidate_entry_W;
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u64 slb_invalidate_all_W;
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struct mfc_cq_sr spuq[16];
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struct mfc_cq_sr puq[8];
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u64 mfc_control_RW;
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u64 puint_mb_R;
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u64 spu_privcntl_RW;
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u64 spu_lslr_RW;
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u64 spu_chnlcntptr_RW;
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u64 spu_chnlcnt_RW;
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u64 spu_chnldata_RW;
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u64 spu_cfg_RW;
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u64 spu_tag_status_query_RW;
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u64 spu_cmd_buf1_RW;
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u64 spu_cmd_buf2_RW;
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u64 spu_atomic_status_RW;
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};
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/**
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* struct spu_state
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* @lscsa: Local Store Context Save Area.
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* @prob: Collapsed Problem State Area, w/o pads.
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* @priv1: Collapsed Privileged 1 Area, w/o pads.
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* @priv2: Collapsed Privileged 2 Area, w/o pads.
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* @spu_chnlcnt_RW: Array of saved channel counts.
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* @spu_chnldata_RW: Array of saved channel data.
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* @suspend_time: Time stamp when decrementer disabled.
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* @slb_esid_RW: Array of saved SLB esid entries.
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* @slb_vsid_RW: Array of saved SLB vsid entries.
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*
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* Structure representing the whole of the SPU
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* context save area (CSA). This struct contains
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* all of the state necessary to suspend and then
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* later optionally resume execution of an SPU
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* context.
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*
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* The @lscsa region is by far the largest, and is
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* allocated separately so that it may either be
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* pinned or mapped to/from application memory, as
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* appropriate for the OS environment.
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*/
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struct spu_state {
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struct spu_lscsa *lscsa;
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struct spu_problem_collapsed prob;
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struct spu_priv1_collapsed priv1;
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struct spu_priv2_collapsed priv2;
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u64 spu_chnlcnt_RW[32];
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u64 spu_chnldata_RW[32];
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u32 spu_mailbox_data[4];
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u32 pu_mailbox_data[1];
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unsigned long suspend_time;
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u64 slb_esid_RW[8];
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u64 slb_vsid_RW[8];
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};
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extern void spu_init_csa(struct spu_state *csa);
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extern void spu_fini_csa(struct spu_state *csa);
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extern int spu_save(struct spu_state *prev, struct spu *spu);
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extern int spu_restore(struct spu_state *new, struct spu *spu);
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extern int spu_switch(struct spu_state *prev, struct spu_state *new,
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struct spu *spu);
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#endif /* __KERNEL__ */
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#endif /* !__ASSEMBLY__ */
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#endif /* _SPU_CSA_H_ */
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