arch/powerpc/include/asm/spu_csa.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * spu_csa.h: Definitions for SPU context save area (CSA).
   4  *
   5  * (C) Copyright IBM 2005
   6  *
   7  * Author: Mark Nutter <mnutter@us.ibm.com>
   8  */
   9
  10 #ifndef _SPU_CSA_H_
  11 #define _SPU_CSA_H_
  12 #ifdef __KERNEL__
  13
  14 /*
  15  * Total number of 128-bit registers.
  16  */
  17 #define NR_SPU_GPRS             128
  18 #define NR_SPU_SPRS             9
  19 #define NR_SPU_REGS_PAD         7
  20 #define NR_SPU_SPILL_REGS       144     /* GPRS + SPRS + PAD */
  21 #define SIZEOF_SPU_SPILL_REGS   NR_SPU_SPILL_REGS * 16
  22
  23 #define SPU_SAVE_COMPLETE       0x3FFB
  24 #define SPU_RESTORE_COMPLETE    0x3FFC
  25
  26 /*
  27  * Definitions for various 'stopped' status conditions,
  28  * to be recreated during context restore.
  29  */
  30 #define SPU_STOPPED_STATUS_P    1
  31 #define SPU_STOPPED_STATUS_I    2
  32 #define SPU_STOPPED_STATUS_H    3
  33 #define SPU_STOPPED_STATUS_S    4
  34 #define SPU_STOPPED_STATUS_S_I  5
  35 #define SPU_STOPPED_STATUS_S_P  6
  36 #define SPU_STOPPED_STATUS_P_H  7
  37 #define SPU_STOPPED_STATUS_P_I  8
  38 #define SPU_STOPPED_STATUS_R    9
  39
  40 /*
  41  * Definitions for software decrementer status flag.
  42  */
  43 #define SPU_DECR_STATUS_RUNNING 0x1
  44 #define SPU_DECR_STATUS_WRAPPED 0x2
  45
  46 #ifndef  __ASSEMBLY__
  47 /**
  48  * spu_reg128 - generic 128-bit register definition.
  49  */
  50 struct spu_reg128 {
  51         u32 slot[4];
  52 };
  53
  54 /**
  55  * struct spu_lscsa - Local Store Context Save Area.
  56  * @gprs: Array of saved registers.
  57  * @fpcr: Saved floating point status control register.
  58  * @decr: Saved decrementer value.
  59  * @decr_status: Indicates software decrementer status flags.
  60  * @ppu_mb: Saved PPU mailbox data.
  61  * @ppuint_mb: Saved PPU interrupting mailbox data.
  62  * @tag_mask: Saved tag group mask.
  63  * @event_mask: Saved event mask.
  64  * @srr0: Saved SRR0.
  65  * @stopped_status: Conditions to be recreated by restore.
  66  * @ls: Saved contents of Local Storage Area.
  67  *
  68  * The LSCSA represents state that is primarily saved and
  69  * restored by SPU-side code.
  70  */
  71 struct spu_lscsa {
  72         struct spu_reg128 gprs[128];
  73         struct spu_reg128 fpcr;
  74         struct spu_reg128 decr;
  75         struct spu_reg128 decr_status;
  76         struct spu_reg128 ppu_mb;
  77         struct spu_reg128 ppuint_mb;
  78         struct spu_reg128 tag_mask;
  79         struct spu_reg128 event_mask;
  80         struct spu_reg128 srr0;
  81         struct spu_reg128 stopped_status;
  82
  83         /*
  84          * 'ls' must be page-aligned on all configurations.
  85          * Since we don't want to rely on having the spu-gcc
  86          * installed to build the kernel and this structure
  87          * is used in the SPU-side code, make it 64k-page
  88          * aligned for now.
  89          */
  90         unsigned char ls[LS_SIZE] __attribute__((aligned(65536)));
  91 };
  92
  93 #ifndef __SPU__
  94 /*
  95  * struct spu_problem_collapsed - condensed problem state area, w/o pads.
  96  */
  97 struct spu_problem_collapsed {
  98         u64 spc_mssync_RW;
  99         u32 mfc_lsa_W;
 100         u32 unused_pad0;
 101         u64 mfc_ea_W;
 102         union mfc_tag_size_class_cmd mfc_union_W;
 103         u32 dma_qstatus_R;
 104         u32 dma_querytype_RW;
 105         u32 dma_querymask_RW;
 106         u32 dma_tagstatus_R;
 107         u32 pu_mb_R;
 108         u32 spu_mb_W;
 109         u32 mb_stat_R;
 110         u32 spu_runcntl_RW;
 111         u32 spu_status_R;
 112         u32 spu_spc_R;
 113         u32 spu_npc_RW;
 114         u32 signal_notify1;
 115         u32 signal_notify2;
 116         u32 unused_pad1;
 117 };
 118
 119 /*
 120  * struct spu_priv1_collapsed - condensed privileged 1 area, w/o pads.
 121  */
 122 struct spu_priv1_collapsed {
 123         u64 mfc_sr1_RW;
 124         u64 mfc_lpid_RW;
 125         u64 spu_idr_RW;
 126         u64 mfc_vr_RO;
 127         u64 spu_vr_RO;
 128         u64 int_mask_class0_RW;
 129         u64 int_mask_class1_RW;
 130         u64 int_mask_class2_RW;
 131         u64 int_stat_class0_RW;
 132         u64 int_stat_class1_RW;
 133         u64 int_stat_class2_RW;
 134         u64 int_route_RW;
 135         u64 mfc_atomic_flush_RW;
 136         u64 resource_allocation_groupID_RW;
 137         u64 resource_allocation_enable_RW;
 138         u64 mfc_fir_R;
 139         u64 mfc_fir_status_or_W;
 140         u64 mfc_fir_status_and_W;
 141         u64 mfc_fir_mask_R;
 142         u64 mfc_fir_mask_or_W;
 143         u64 mfc_fir_mask_and_W;
 144         u64 mfc_fir_chkstp_enable_RW;
 145         u64 smf_sbi_signal_sel;
 146         u64 smf_ato_signal_sel;
 147         u64 tlb_index_hint_RO;
 148         u64 tlb_index_W;
 149         u64 tlb_vpn_RW;
 150         u64 tlb_rpn_RW;
 151         u64 tlb_invalidate_entry_W;
 152         u64 tlb_invalidate_all_W;
 153         u64 smm_hid;
 154         u64 mfc_accr_RW;
 155         u64 mfc_dsisr_RW;
 156         u64 mfc_dar_RW;
 157         u64 rmt_index_RW;
 158         u64 rmt_data1_RW;
 159         u64 mfc_dsir_R;
 160         u64 mfc_lsacr_RW;
 161         u64 mfc_lscrr_R;
 162         u64 mfc_tclass_id_RW;
 163         u64 mfc_rm_boundary;
 164         u64 smf_dma_signal_sel;
 165         u64 smm_signal_sel;
 166         u64 mfc_cer_R;
 167         u64 pu_ecc_cntl_RW;
 168         u64 pu_ecc_stat_RW;
 169         u64 spu_ecc_addr_RW;
 170         u64 spu_err_mask_RW;
 171         u64 spu_trig0_sel;
 172         u64 spu_trig1_sel;
 173         u64 spu_trig2_sel;
 174         u64 spu_trig3_sel;
 175         u64 spu_trace_sel;
 176         u64 spu_event0_sel;
 177         u64 spu_event1_sel;
 178         u64 spu_event2_sel;
 179         u64 spu_event3_sel;
 180         u64 spu_trace_cntl;
 181 };
 182
 183 /*
 184  * struct spu_priv2_collapsed - condensed privileged 2 area, w/o pads.
 185  */
 186 struct spu_priv2_collapsed {
 187         u64 slb_index_W;
 188         u64 slb_esid_RW;
 189         u64 slb_vsid_RW;
 190         u64 slb_invalidate_entry_W;
 191         u64 slb_invalidate_all_W;
 192         struct mfc_cq_sr spuq[16];
 193         struct mfc_cq_sr puq[8];
 194         u64 mfc_control_RW;
 195         u64 puint_mb_R;
 196         u64 spu_privcntl_RW;
 197         u64 spu_lslr_RW;
 198         u64 spu_chnlcntptr_RW;
 199         u64 spu_chnlcnt_RW;
 200         u64 spu_chnldata_RW;
 201         u64 spu_cfg_RW;
 202         u64 spu_tag_status_query_RW;
 203         u64 spu_cmd_buf1_RW;
 204         u64 spu_cmd_buf2_RW;
 205         u64 spu_atomic_status_RW;
 206 };
 207
 208 /**
 209  * struct spu_state
 210  * @lscsa: Local Store Context Save Area.
 211  * @prob: Collapsed Problem State Area, w/o pads.
 212  * @priv1: Collapsed Privileged 1 Area, w/o pads.
 213  * @priv2: Collapsed Privileged 2 Area, w/o pads.
 214  * @spu_chnlcnt_RW: Array of saved channel counts.
 215  * @spu_chnldata_RW: Array of saved channel data.
 216  * @suspend_time: Time stamp when decrementer disabled.
 217  *
 218  * Structure representing the whole of the SPU
 219  * context save area (CSA).  This struct contains
 220  * all of the state necessary to suspend and then
 221  * later optionally resume execution of an SPU
 222  * context.
 223  *
 224  * The @lscsa region is by far the largest, and is
 225  * allocated separately so that it may either be
 226  * pinned or mapped to/from application memory, as
 227  * appropriate for the OS environment.
 228  */
 229 struct spu_state {
 230         struct spu_lscsa *lscsa;
 231         struct spu_problem_collapsed prob;
 232         struct spu_priv1_collapsed priv1;
 233         struct spu_priv2_collapsed priv2;
 234         u64 spu_chnlcnt_RW[32];
 235         u64 spu_chnldata_RW[32];
 236         u32 spu_mailbox_data[4];
 237         u32 pu_mailbox_data[1];
 238         u64 class_0_dar, class_0_pending;
 239         u64 class_1_dar, class_1_dsisr;
 240         unsigned long suspend_time;
 241         spinlock_t register_lock;
 242 };
 243
 244 #endif /* !__SPU__ */
 245 #endif /* __KERNEL__ */
 246 #endif /* !__ASSEMBLY__ */
 247 #endif /* _SPU_CSA_H_ */