release/src-rt-6.x/linux/linux-2.6/include/sound/cs46xx_dsp_task_types.h

   1 /*
   2  *  The driver for the Cirrus Logic's Sound Fusion CS46XX based soundcards
   3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
   4  *
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  *
  20  *
  21  * NOTE: comments are copy/paste from cwcemb80.lst
  22  * provided by Tom Woller at Cirrus (my only
  23  * documentation about the SP OS running inside
  24  * the DSP)
  25  */
  26
  27 #ifndef __CS46XX_DSP_TASK_TYPES_H__
  28 #define __CS46XX_DSP_TASK_TYPES_H__
  29
  30 #include "cs46xx_dsp_scb_types.h"
  31
  32 /*********************************************************************************************
  33 Example hierarchy of stream control blocks in the SP
  34
  35 hfgTree
  36 Ptr____Call (c)
  37        \
  38  -------+------         -------------      -------------      -------------      -----
  39 | SBlaster IF  |______\| Foreground  |___\| Middlegr'nd |___\| Background  |___\| Nul |
  40 |              |Goto  /| tree header |g  /| tree header |g  /| tree header |g  /| SCB |r
  41  -------------- (g)     -------------      -------------      -------------      -----
  42        |c                     |c                 |c                 |c
  43        |                      |                  |                  |
  44       \/                  -------------      -------------      -------------
  45                        | Foreground  |_\  | Middlegr'nd |_\  | Background  |_\
  46                        |     tree    |g/  |    tree     |g/  |     tree    |g/
  47                         -------------      -------------      -------------
  48                               |c                 |c                 |c
  49                               |                  |                  |
  50                              \/                 \/                 \/
  51
  52 *********************************************************************************************/
  53
  54 #define         HFG_FIRST_EXECUTE_MODE                  0x0001
  55 #define         HFG_FIRST_EXECUTE_MODE_BIT              0
  56 #define         HFG_CONTEXT_SWITCH_MODE                 0x0002
  57 #define         HFG_CONTEXT_SWITCH_MODE_BIT             1
  58
  59 #define MAX_FG_STACK_SIZE       32                      /* THESE NEED TO BE COMPUTED PROPERLY */
  60 #define MAX_MG_STACK_SIZE       16
  61 #define MAX_BG_STACK_SIZE       9
  62 #define MAX_HFG_STACK_SIZE      4
  63
  64 #define SLEEP_ACTIVE_INCREMENT          0               /* Enable task tree thread to go to sleep
  65                                                                                            This should only ever be used on the Background thread */
  66 #define STANDARD_ACTIVE_INCREMENT       1               /* Task tree thread normal operation */
  67 #define SUSPEND_ACTIVE_INCREMENT        2               /* Cause execution to suspend in the task tree thread
  68                                                This should only ever be used on the Background thread */
  69
  70 #define HOSTFLAGS_DISABLE_BG_SLEEP  0       /* Host-controlled flag that determines whether we go to sleep
  71                                                at the end of BG */
  72
  73 /* Minimal context save area for Hyper Forground */
  74 struct dsp_hf_save_area {
  75         u32     r10_save;
  76         u32     r54_save;
  77         u32     r98_save;
  78
  79         ___DSP_DUAL_16BIT_ALLOC(
  80             status_save,
  81             ind_save
  82         )
  83
  84         ___DSP_DUAL_16BIT_ALLOC(
  85             rci1_save,
  86             rci0_save
  87         )
  88
  89         u32     r32_save;
  90         u32     r76_save;
  91         u32     rsd2_save;
  92
  93         ___DSP_DUAL_16BIT_ALLOC(
  94               rsi2_save,          /* See TaskTreeParameterBlock for
  95                                      remainder of registers  */
  96               rsa2Save
  97         )
  98         /* saved as part of HFG context  */
  99 };
 100
 101
 102 /* Task link data structure */
 103 struct dsp_tree_link {
 104         ___DSP_DUAL_16BIT_ALLOC(
 105         /* Pointer to sibling task control block */
 106             next_scb,
 107         /* Pointer to child task control block */
 108             sub_ptr
 109         )
 110
 111         ___DSP_DUAL_16BIT_ALLOC(
 112         /* Pointer to code entry point */
 113             entry_point,
 114         /* Pointer to local data */
 115             this_spb
 116         )
 117 };
 118
 119
 120 struct dsp_task_tree_data {
 121         ___DSP_DUAL_16BIT_ALLOC(
 122         /* Initial tock count; controls task tree execution rate */
 123             tock_count_limit,
 124         /* Tock down counter */
 125             tock_count
 126         )
 127
 128         /* Add to ActiveCount when TockCountLimit reached:
 129            Subtract on task tree termination */
 130         ___DSP_DUAL_16BIT_ALLOC(
 131             active_tncrement,
 132         /* Number of pending activations for task tree */
 133             active_count
 134         )
 135
 136         ___DSP_DUAL_16BIT_ALLOC(
 137         /* BitNumber to enable modification of correct bit in ActiveTaskFlags */
 138             active_bit,
 139         /* Pointer to OS location for indicating current activity on task level */
 140             active_task_flags_ptr
 141         )
 142
 143         /* Data structure for controlling movement of memory blocks:-
 144            currently unused */
 145         ___DSP_DUAL_16BIT_ALLOC(
 146             mem_upd_ptr,
 147         /* Data structure for controlling synchronous link update */
 148             link_upd_ptr
 149         )
 150
 151         ___DSP_DUAL_16BIT_ALLOC(
 152         /* Save area for remainder of full context. */
 153             save_area,
 154         /* Address of start of local stack for data storage */
 155             data_stack_base_ptr
 156         )
 157
 158 };
 159
 160
 161 struct dsp_interval_timer_data
 162 {
 163         /* These data items have the same relative locations to those */
 164         ___DSP_DUAL_16BIT_ALLOC(
 165              interval_timer_period,
 166              itd_unused
 167         )
 168
 169         /* used for this data in the SPOS control block for SPOS 1.0 */
 170         ___DSP_DUAL_16BIT_ALLOC(
 171              num_FG_ticks_this_interval,
 172              num_intervals
 173         )
 174 };
 175
 176
 177 /* This structure contains extra storage for the task tree
 178    Currently, this additional data is related only to a full context save */
 179 struct dsp_task_tree_context_block {
 180         /* Up to 10 values are saved onto the stack.  8 for the task tree, 1 for
 181            The access to the context switch (call or interrupt), and 1 spare that
 182            users should never use.  This last may be required by the system */
 183         ___DSP_DUAL_16BIT_ALLOC(
 184              stack1,
 185              stack0
 186         )
 187         ___DSP_DUAL_16BIT_ALLOC(
 188              stack3,
 189              stack2
 190         )
 191         ___DSP_DUAL_16BIT_ALLOC(
 192              stack5,
 193              stack4
 194         )
 195         ___DSP_DUAL_16BIT_ALLOC(
 196              stack7,
 197              stack6
 198         )
 199         ___DSP_DUAL_16BIT_ALLOC(
 200              stack9,
 201              stack8
 202         )
 203
 204         u32       saverfe;
 205
 206         /* Value may be overwriten by stack save algorithm.
 207            Retain the size of the stack data saved here if used */
 208         ___DSP_DUAL_16BIT_ALLOC(
 209              reserved1,
 210              stack_size
 211         )
 212         u32             saverba;          /* (HFG) */
 213         u32             saverdc;
 214         u32             savers_config_23; /* (HFG) */
 215         u32             savers_DMA23;     /* (HFG) */
 216         u32             saversa0;
 217         u32             saversi0;
 218         u32             saversa1;
 219         u32             saversi1;
 220         u32             saversa3;
 221         u32             saversd0;
 222         u32             saversd1;
 223         u32             saversd3;
 224         u32             savers_config01;
 225         u32             savers_DMA01;
 226         u32             saveacc0hl;
 227         u32             saveacc1hl;
 228         u32             saveacc0xacc1x;
 229         u32             saveacc2hl;
 230         u32             saveacc3hl;
 231         u32             saveacc2xacc3x;
 232         u32             saveaux0hl;
 233         u32             saveaux1hl;
 234         u32             saveaux0xaux1x;
 235         u32             saveaux2hl;
 236         u32             saveaux3hl;
 237         u32             saveaux2xaux3x;
 238         u32             savershouthl;
 239         u32             savershoutxmacmode;
 240 };
 241
 242
 243 struct dsp_task_tree_control_block {
 244         struct dsp_hf_save_area                 context;
 245         struct dsp_tree_link                    links;
 246         struct dsp_task_tree_data               data;
 247         struct dsp_task_tree_context_block      context_blk;
 248         struct dsp_interval_timer_data          int_timer;
 249 };
 250
 251
 252 #endif /* __DSP_TASK_TYPES_H__ */