include/asm-powerpc/spu_csa.h

   1 /*
   2  * spu_csa.h: Definitions for SPU context save area (CSA).
   3  *
   4  * (C) Copyright IBM 2005
   5  *
   6  * Author: Mark Nutter <mnutter@us.ibm.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #ifndef _SPU_CSA_H_
  24 #define _SPU_CSA_H_
  25 #ifdef __KERNEL__
  26
  27 /*
  28  * Total number of 128-bit registers.
  29  */
  30 #define NR_SPU_GPRS             128
  31 #define NR_SPU_SPRS             9
  32 #define NR_SPU_REGS_PAD         7
  33 #define NR_SPU_SPILL_REGS       144     /* GPRS + SPRS + PAD */
  34 #define SIZEOF_SPU_SPILL_REGS   NR_SPU_SPILL_REGS * 16
  35
  36 #define SPU_SAVE_COMPLETE       0x3FFB
  37 #define SPU_RESTORE_COMPLETE    0x3FFC
  38
  39 /*
  40  * Definitions for various 'stopped' status conditions,
  41  * to be recreated during context restore.
  42  */
  43 #define SPU_STOPPED_STATUS_P    1
  44 #define SPU_STOPPED_STATUS_I    2
  45 #define SPU_STOPPED_STATUS_H    3
  46 #define SPU_STOPPED_STATUS_S    4
  47 #define SPU_STOPPED_STATUS_S_I  5
  48 #define SPU_STOPPED_STATUS_S_P  6
  49 #define SPU_STOPPED_STATUS_P_H  7
  50 #define SPU_STOPPED_STATUS_P_I  8
  51 #define SPU_STOPPED_STATUS_R    9
  52
  53 /*
  54  * Definitions for software decrementer status flag.
  55  */
  56 #define SPU_DECR_STATUS_RUNNING 0x1
  57 #define SPU_DECR_STATUS_WRAPPED 0x2
  58
  59 #ifndef  __ASSEMBLY__
  60 /**
  61  * spu_reg128 - generic 128-bit register definition.
  62  */
  63 struct spu_reg128 {
  64         u32 slot[4];
  65 };
  66
  67 /**
  68  * struct spu_lscsa - Local Store Context Save Area.
  69  * @gprs: Array of saved registers.
  70  * @fpcr: Saved floating point status control register.
  71  * @decr: Saved decrementer value.
  72  * @decr_status: Indicates software decrementer status flags.
  73  * @ppu_mb: Saved PPU mailbox data.
  74  * @ppuint_mb: Saved PPU interrupting mailbox data.
  75  * @tag_mask: Saved tag group mask.
  76  * @event_mask: Saved event mask.
  77  * @srr0: Saved SRR0.
  78  * @stopped_status: Conditions to be recreated by restore.
  79  * @ls: Saved contents of Local Storage Area.
  80  *
  81  * The LSCSA represents state that is primarily saved and
  82  * restored by SPU-side code.
  83  */
  84 struct spu_lscsa {
  85         struct spu_reg128 gprs[128];
  86         struct spu_reg128 fpcr;
  87         struct spu_reg128 decr;
  88         struct spu_reg128 decr_status;
  89         struct spu_reg128 ppu_mb;
  90         struct spu_reg128 ppuint_mb;
  91         struct spu_reg128 tag_mask;
  92         struct spu_reg128 event_mask;
  93         struct spu_reg128 srr0;
  94         struct spu_reg128 stopped_status;
  95
  96         /*
  97          * 'ls' must be page-aligned on all configurations.
  98          * Since we don't want to rely on having the spu-gcc
  99          * installed to build the kernel and this structure
 100          * is used in the SPU-side code, make it 64k-page
 101          * aligned for now.
 102          */
 103         unsigned char ls[LS_SIZE] __attribute__((aligned(65536)));
 104 };
 105
 106 #ifndef __SPU__
 107 /*
 108  * struct spu_problem_collapsed - condensed problem state area, w/o pads.
 109  */
 110 struct spu_problem_collapsed {
 111         u64 spc_mssync_RW;
 112         u32 mfc_lsa_W;
 113         u32 unused_pad0;
 114         u64 mfc_ea_W;
 115         union mfc_tag_size_class_cmd mfc_union_W;
 116         u32 dma_qstatus_R;
 117         u32 dma_querytype_RW;
 118         u32 dma_querymask_RW;
 119         u32 dma_tagstatus_R;
 120         u32 pu_mb_R;
 121         u32 spu_mb_W;
 122         u32 mb_stat_R;
 123         u32 spu_runcntl_RW;
 124         u32 spu_status_R;
 125         u32 spu_spc_R;
 126         u32 spu_npc_RW;
 127         u32 signal_notify1;
 128         u32 signal_notify2;
 129         u32 unused_pad1;
 130 };
 131
 132 /*
 133  * struct spu_priv1_collapsed - condensed privileged 1 area, w/o pads.
 134  */
 135 struct spu_priv1_collapsed {
 136         u64 mfc_sr1_RW;
 137         u64 mfc_lpid_RW;
 138         u64 spu_idr_RW;
 139         u64 mfc_vr_RO;
 140         u64 spu_vr_RO;
 141         u64 int_mask_class0_RW;
 142         u64 int_mask_class1_RW;
 143         u64 int_mask_class2_RW;
 144         u64 int_stat_class0_RW;
 145         u64 int_stat_class1_RW;
 146         u64 int_stat_class2_RW;
 147         u64 int_route_RW;
 148         u64 mfc_atomic_flush_RW;
 149         u64 resource_allocation_groupID_RW;
 150         u64 resource_allocation_enable_RW;
 151         u64 mfc_fir_R;
 152         u64 mfc_fir_status_or_W;
 153         u64 mfc_fir_status_and_W;
 154         u64 mfc_fir_mask_R;
 155         u64 mfc_fir_mask_or_W;
 156         u64 mfc_fir_mask_and_W;
 157         u64 mfc_fir_chkstp_enable_RW;
 158         u64 smf_sbi_signal_sel;
 159         u64 smf_ato_signal_sel;
 160         u64 tlb_index_hint_RO;
 161         u64 tlb_index_W;
 162         u64 tlb_vpn_RW;
 163         u64 tlb_rpn_RW;
 164         u64 tlb_invalidate_entry_W;
 165         u64 tlb_invalidate_all_W;
 166         u64 smm_hid;
 167         u64 mfc_accr_RW;
 168         u64 mfc_dsisr_RW;
 169         u64 mfc_dar_RW;
 170         u64 rmt_index_RW;
 171         u64 rmt_data1_RW;
 172         u64 mfc_dsir_R;
 173         u64 mfc_lsacr_RW;
 174         u64 mfc_lscrr_R;
 175         u64 mfc_tclass_id_RW;
 176         u64 mfc_rm_boundary;
 177         u64 smf_dma_signal_sel;
 178         u64 smm_signal_sel;
 179         u64 mfc_cer_R;
 180         u64 pu_ecc_cntl_RW;
 181         u64 pu_ecc_stat_RW;
 182         u64 spu_ecc_addr_RW;
 183         u64 spu_err_mask_RW;
 184         u64 spu_trig0_sel;
 185         u64 spu_trig1_sel;
 186         u64 spu_trig2_sel;
 187         u64 spu_trig3_sel;
 188         u64 spu_trace_sel;
 189         u64 spu_event0_sel;
 190         u64 spu_event1_sel;
 191         u64 spu_event2_sel;
 192         u64 spu_event3_sel;
 193         u64 spu_trace_cntl;
 194 };
 195
 196 /*
 197  * struct spu_priv2_collapsed - condensed priviliged 2 area, w/o pads.
 198  */
 199 struct spu_priv2_collapsed {
 200         u64 slb_index_W;
 201         u64 slb_esid_RW;
 202         u64 slb_vsid_RW;
 203         u64 slb_invalidate_entry_W;
 204         u64 slb_invalidate_all_W;
 205         struct mfc_cq_sr spuq[16];
 206         struct mfc_cq_sr puq[8];
 207         u64 mfc_control_RW;
 208         u64 puint_mb_R;
 209         u64 spu_privcntl_RW;
 210         u64 spu_lslr_RW;
 211         u64 spu_chnlcntptr_RW;
 212         u64 spu_chnlcnt_RW;
 213         u64 spu_chnldata_RW;
 214         u64 spu_cfg_RW;
 215         u64 spu_tag_status_query_RW;
 216         u64 spu_cmd_buf1_RW;
 217         u64 spu_cmd_buf2_RW;
 218         u64 spu_atomic_status_RW;
 219 };
 220
 221 /**
 222  * struct spu_state
 223  * @lscsa: Local Store Context Save Area.
 224  * @prob: Collapsed Problem State Area, w/o pads.
 225  * @priv1: Collapsed Privileged 1 Area, w/o pads.
 226  * @priv2: Collapsed Privileged 2 Area, w/o pads.
 227  * @spu_chnlcnt_RW: Array of saved channel counts.
 228  * @spu_chnldata_RW: Array of saved channel data.
 229  * @suspend_time: Time stamp when decrementer disabled.
 230  *
 231  * Structure representing the whole of the SPU
 232  * context save area (CSA).  This struct contains
 233  * all of the state necessary to suspend and then
 234  * later optionally resume execution of an SPU
 235  * context.
 236  *
 237  * The @lscsa region is by far the largest, and is
 238  * allocated separately so that it may either be
 239  * pinned or mapped to/from application memory, as
 240  * appropriate for the OS environment.
 241  */
 242 struct spu_state {
 243         struct spu_lscsa *lscsa;
 244 #ifdef CONFIG_SPU_FS_64K_LS
 245         int             use_big_pages;
 246         /* One struct page per 64k page */
 247 #define SPU_LSCSA_NUM_BIG_PAGES (sizeof(struct spu_lscsa) / 0x10000)
 248         struct page     *lscsa_pages[SPU_LSCSA_NUM_BIG_PAGES];
 249 #endif
 250         struct spu_problem_collapsed prob;
 251         struct spu_priv1_collapsed priv1;
 252         struct spu_priv2_collapsed priv2;
 253         u64 spu_chnlcnt_RW[32];
 254         u64 spu_chnldata_RW[32];
 255         u32 spu_mailbox_data[4];
 256         u32 pu_mailbox_data[1];
 257         u64 dar, dsisr;
 258         unsigned long suspend_time;
 259         spinlock_t register_lock;
 260 };
 261
 262 extern int spu_init_csa(struct spu_state *csa);
 263 extern void spu_fini_csa(struct spu_state *csa);
 264 extern int spu_save(struct spu_state *prev, struct spu *spu);
 265 extern int spu_restore(struct spu_state *new, struct spu *spu);
 266 extern int spu_switch(struct spu_state *prev, struct spu_state *new,
 267                       struct spu *spu);
 268 extern int spu_alloc_lscsa(struct spu_state *csa);
 269 extern void spu_free_lscsa(struct spu_state *csa);
 270
 271 #endif /* !__SPU__ */
 272 #endif /* __KERNEL__ */
 273 #endif /* !__ASSEMBLY__ */
 274 #endif /* _SPU_CSA_H_ */