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* spu_csa.h: Definitions for SPU context save area (CSA).
* (C) Copyright IBM 2005
* Author: Mark Nutter <>
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#ifndef _SPU_CSA_H_
#define _SPU_CSA_H_
#ifdef __KERNEL__
* Total number of 128-bit registers.
#define NR_SPU_GPRS 128
#define NR_SPU_SPRS 9
#define NR_SPU_REGS_PAD 7
#define NR_SPU_SPILL_REGS 144 /* GPRS + SPRS + PAD */
* Definitions for various 'stopped' status conditions,
* to be recreated during context restore.
#ifndef __ASSEMBLY__
* spu_reg128 - generic 128-bit register definition.
struct spu_reg128 {
u32 slot[4];
* struct spu_lscsa - Local Store Context Save Area.
* @gprs: Array of saved registers.
* @fpcr: Saved floating point status control register.
* @decr: Saved decrementer value.
* @decr_status: Indicates decrementer run status.
* @ppu_mb: Saved PPU mailbox data.
* @ppuint_mb: Saved PPU interrupting mailbox data.
* @tag_mask: Saved tag group mask.
* @event_mask: Saved event mask.
* @srr0: Saved SRR0.
* @stopped_status: Conditions to be recreated by restore.
* @ls: Saved contents of Local Storage Area.
* The LSCSA represents state that is primarily saved and
* restored by SPU-side code.
struct spu_lscsa {
struct spu_reg128 gprs[128];
struct spu_reg128 fpcr;
struct spu_reg128 decr;
struct spu_reg128 decr_status;
struct spu_reg128 ppu_mb;
struct spu_reg128 ppuint_mb;
struct spu_reg128 tag_mask;
struct spu_reg128 event_mask;
struct spu_reg128 srr0;
struct spu_reg128 stopped_status;
* 'ls' must be page-aligned on all configurations.
* Since we don't want to rely on having the spu-gcc
* installed to build the kernel and this structure
* is used in the SPU-side code, make it 64k-page
* aligned for now.
unsigned char ls[LS_SIZE] __attribute__((aligned(65536)));
#ifndef __SPU__
* struct spu_problem_collapsed - condensed problem state area, w/o pads.
struct spu_problem_collapsed {
u64 spc_mssync_RW;
u32 mfc_lsa_W;
u32 unused_pad0;
u64 mfc_ea_W;
union mfc_tag_size_class_cmd mfc_union_W;
u32 dma_qstatus_R;
u32 dma_querytype_RW;
u32 dma_querymask_RW;
u32 dma_tagstatus_R;
u32 pu_mb_R;
u32 spu_mb_W;
u32 mb_stat_R;
u32 spu_runcntl_RW;
u32 spu_status_R;
u32 spu_spc_R;
u32 spu_npc_RW;
u32 signal_notify1;
u32 signal_notify2;
u32 unused_pad1;
* struct spu_priv1_collapsed - condensed privileged 1 area, w/o pads.
struct spu_priv1_collapsed {
u64 mfc_sr1_RW;
u64 mfc_lpid_RW;
u64 spu_idr_RW;
u64 mfc_vr_RO;
u64 spu_vr_RO;
u64 int_mask_class0_RW;
u64 int_mask_class1_RW;
u64 int_mask_class2_RW;
u64 int_stat_class0_RW;
u64 int_stat_class1_RW;
u64 int_stat_class2_RW;
u64 int_route_RW;
u64 mfc_atomic_flush_RW;
u64 resource_allocation_groupID_RW;
u64 resource_allocation_enable_RW;
u64 mfc_fir_R;
u64 mfc_fir_status_or_W;
u64 mfc_fir_status_and_W;
u64 mfc_fir_mask_R;
u64 mfc_fir_mask_or_W;
u64 mfc_fir_mask_and_W;
u64 mfc_fir_chkstp_enable_RW;
u64 smf_sbi_signal_sel;
u64 smf_ato_signal_sel;
u64 tlb_index_hint_RO;
u64 tlb_index_W;
u64 tlb_vpn_RW;
u64 tlb_rpn_RW;
u64 tlb_invalidate_entry_W;
u64 tlb_invalidate_all_W;
u64 smm_hid;
u64 mfc_accr_RW;
u64 mfc_dsisr_RW;
u64 mfc_dar_RW;
u64 rmt_index_RW;
u64 rmt_data1_RW;
u64 mfc_dsir_R;
u64 mfc_lsacr_RW;
u64 mfc_lscrr_R;
u64 mfc_tclass_id_RW;
u64 mfc_rm_boundary;
u64 smf_dma_signal_sel;
u64 smm_signal_sel;
u64 mfc_cer_R;
u64 pu_ecc_cntl_RW;
u64 pu_ecc_stat_RW;
u64 spu_ecc_addr_RW;
u64 spu_err_mask_RW;
u64 spu_trig0_sel;
u64 spu_trig1_sel;
u64 spu_trig2_sel;
u64 spu_trig3_sel;
u64 spu_trace_sel;
u64 spu_event0_sel;
u64 spu_event1_sel;
u64 spu_event2_sel;
u64 spu_event3_sel;
u64 spu_trace_cntl;
* struct spu_priv2_collapsed - condensed priviliged 2 area, w/o pads.
struct spu_priv2_collapsed {
u64 slb_index_W;
u64 slb_esid_RW;
u64 slb_vsid_RW;
u64 slb_invalidate_entry_W;
u64 slb_invalidate_all_W;
struct mfc_cq_sr spuq[16];
struct mfc_cq_sr puq[8];
u64 mfc_control_RW;
u64 puint_mb_R;
u64 spu_privcntl_RW;
u64 spu_lslr_RW;
u64 spu_chnlcntptr_RW;
u64 spu_chnlcnt_RW;
u64 spu_chnldata_RW;
u64 spu_cfg_RW;
u64 spu_tag_status_query_RW;
u64 spu_cmd_buf1_RW;
u64 spu_cmd_buf2_RW;
u64 spu_atomic_status_RW;
* struct spu_state
* @lscsa: Local Store Context Save Area.
* @prob: Collapsed Problem State Area, w/o pads.
* @priv1: Collapsed Privileged 1 Area, w/o pads.
* @priv2: Collapsed Privileged 2 Area, w/o pads.
* @spu_chnlcnt_RW: Array of saved channel counts.
* @spu_chnldata_RW: Array of saved channel data.
* @suspend_time: Time stamp when decrementer disabled.
* @slb_esid_RW: Array of saved SLB esid entries.
* @slb_vsid_RW: Array of saved SLB vsid entries.
* Structure representing the whole of the SPU
* context save area (CSA). This struct contains
* all of the state necessary to suspend and then
* later optionally resume execution of an SPU
* context.
* The @lscsa region is by far the largest, and is
* allocated separately so that it may either be
* pinned or mapped to/from application memory, as
* appropriate for the OS environment.
struct spu_state {
struct spu_lscsa *lscsa;
struct spu_problem_collapsed prob;
struct spu_priv1_collapsed priv1;
struct spu_priv2_collapsed priv2;
u64 spu_chnlcnt_RW[32];
u64 spu_chnldata_RW[32];
u32 spu_mailbox_data[4];
u32 pu_mailbox_data[1];
unsigned long suspend_time;
u64 slb_esid_RW[8];
u64 slb_vsid_RW[8];
spinlock_t register_lock;
extern void spu_init_csa(struct spu_state *csa);
extern void spu_fini_csa(struct spu_state *csa);
extern int spu_save(struct spu_state *prev, struct spu *spu);
extern int spu_restore(struct spu_state *new, struct spu *spu);
extern int spu_switch(struct spu_state *prev, struct spu_state *new,
struct spu *spu);
#endif /* !__SPU__ */
#endif /* __KERNEL__ */
#endif /* !__ASSEMBLY__ */
#endif /* _SPU_CSA_H_ */