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1/*
2 * Copyright 2016 Advanced Micro Devices, Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23/* To compile this assembly code:
24 *
25 * gfx9:
26 * cpp -DASIC_FAMILY=CHIP_VEGAM cwsr_trap_handler_gfx9.asm -P -o gfx9.sp3
27 * sp3 gfx9.sp3 -hex gfx9.hex
28 *
29 * arcturus:
30 * cpp -DASIC_FAMILY=CHIP_ARCTURUS cwsr_trap_handler_gfx9.asm -P -o arcturus.sp3
31 * sp3 arcturus.sp3 -hex arcturus.hex
32 *
33 * aldebaran:
34 * cpp -DASIC_FAMILY=CHIP_ALDEBARAN cwsr_trap_handler_gfx9.asm -P -o aldebaran.sp3
35 * sp3 aldebaran.sp3 -hex aldebaran.hex
36 */
37
38#define CHIP_VEGAM 18
39#define CHIP_ARCTURUS 23
40#define CHIP_ALDEBARAN 25
41
42var ACK_SQC_STORE = 1 //workaround for suspected SQC store bug causing incorrect stores under concurrency
43var SAVE_AFTER_XNACK_ERROR = 1 //workaround for TCP store failure after XNACK error when ALLOW_REPLAY=0, for debugger
44var SINGLE_STEP_MISSED_WORKAROUND = 1 //workaround for lost MODE.DEBUG_EN exception when SAVECTX raised
45
46/**************************************************************************/
47/* variables */
48/**************************************************************************/
49var SQ_WAVE_STATUS_INST_ATC_SHIFT = 23
50var SQ_WAVE_STATUS_INST_ATC_MASK = 0x00800000
51var SQ_WAVE_STATUS_SPI_PRIO_SHIFT = 1
52var SQ_WAVE_STATUS_SPI_PRIO_MASK = 0x00000006
53var SQ_WAVE_STATUS_HALT_MASK = 0x2000
54var SQ_WAVE_STATUS_PRE_SPI_PRIO_SHIFT = 0
55var SQ_WAVE_STATUS_PRE_SPI_PRIO_SIZE = 1
56var SQ_WAVE_STATUS_POST_SPI_PRIO_SHIFT = 3
57var SQ_WAVE_STATUS_POST_SPI_PRIO_SIZE = 29
58var SQ_WAVE_STATUS_ALLOW_REPLAY_MASK = 0x400000
59
60var SQ_WAVE_LDS_ALLOC_LDS_SIZE_SHIFT = 12
61var SQ_WAVE_LDS_ALLOC_LDS_SIZE_SIZE = 9
62var SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SIZE = 6
63var SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SIZE = 3 //FIXME sq.blk still has 4 bits at this time while SQ programming guide has 3 bits
64var SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SHIFT = 24
65
66#if ASIC_FAMILY >= CHIP_ALDEBARAN
67var SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SHIFT = 6
68var SQ_WAVE_GPR_ALLOC_ACCV_OFFSET_SHIFT = 12
69var SQ_WAVE_GPR_ALLOC_ACCV_OFFSET_SIZE = 6
70#else
71var SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SHIFT = 8
72#endif
73
74var SQ_WAVE_TRAPSTS_SAVECTX_MASK = 0x400
75var SQ_WAVE_TRAPSTS_EXCE_MASK = 0x1FF // Exception mask
76var SQ_WAVE_TRAPSTS_SAVECTX_SHIFT = 10
77var SQ_WAVE_TRAPSTS_MEM_VIOL_MASK = 0x100
78var SQ_WAVE_TRAPSTS_MEM_VIOL_SHIFT = 8
79var SQ_WAVE_TRAPSTS_PRE_SAVECTX_MASK = 0x3FF
80var SQ_WAVE_TRAPSTS_PRE_SAVECTX_SHIFT = 0x0
81var SQ_WAVE_TRAPSTS_PRE_SAVECTX_SIZE = 10
82var SQ_WAVE_TRAPSTS_POST_SAVECTX_MASK = 0xFFFFF800
83var SQ_WAVE_TRAPSTS_POST_SAVECTX_SHIFT = 11
84var SQ_WAVE_TRAPSTS_POST_SAVECTX_SIZE = 21
85var SQ_WAVE_TRAPSTS_ILLEGAL_INST_MASK = 0x800
86var SQ_WAVE_TRAPSTS_XNACK_ERROR_MASK = 0x10000000
87
88var SQ_WAVE_IB_STS_RCNT_SHIFT = 16 //FIXME
89var SQ_WAVE_IB_STS_FIRST_REPLAY_SHIFT = 15 //FIXME
90var SQ_WAVE_IB_STS_RCNT_FIRST_REPLAY_MASK = 0x1F8000
91var SQ_WAVE_IB_STS_RCNT_FIRST_REPLAY_MASK_NEG = 0x00007FFF //FIXME
92
93var SQ_WAVE_MODE_DEBUG_EN_MASK = 0x800
94
95var SQ_BUF_RSRC_WORD1_ATC_SHIFT = 24
96var SQ_BUF_RSRC_WORD3_MTYPE_SHIFT = 27
97
98var TTMP11_SAVE_RCNT_FIRST_REPLAY_SHIFT = 26 // bits [31:26] unused by SPI debug data
99var TTMP11_SAVE_RCNT_FIRST_REPLAY_MASK = 0xFC000000
100
101/* Save */
102var S_SAVE_BUF_RSRC_WORD1_STRIDE = 0x00040000 //stride is 4 bytes
103var S_SAVE_BUF_RSRC_WORD3_MISC = 0x00807FAC //SQ_SEL_X/Y/Z/W, BUF_NUM_FORMAT_FLOAT, (0 for MUBUF stride[17:14] when ADD_TID_ENABLE and BUF_DATA_FORMAT_32 for MTBUF), ADD_TID_ENABLE
104
105var S_SAVE_SPI_INIT_ATC_MASK = 0x08000000 //bit[27]: ATC bit
106var S_SAVE_SPI_INIT_ATC_SHIFT = 27
107var S_SAVE_SPI_INIT_MTYPE_MASK = 0x70000000 //bit[30:28]: Mtype
108var S_SAVE_SPI_INIT_MTYPE_SHIFT = 28
109var S_SAVE_SPI_INIT_FIRST_WAVE_MASK = 0x04000000 //bit[26]: FirstWaveInTG
110var S_SAVE_SPI_INIT_FIRST_WAVE_SHIFT = 26
111
112var S_SAVE_PC_HI_RCNT_SHIFT = 27 //FIXME check with Brian to ensure all fields other than PC[47:0] can be used
113var S_SAVE_PC_HI_RCNT_MASK = 0xF8000000 //FIXME
114var S_SAVE_PC_HI_FIRST_REPLAY_SHIFT = 26 //FIXME
115var S_SAVE_PC_HI_FIRST_REPLAY_MASK = 0x04000000 //FIXME
116
117var s_save_spi_init_lo = exec_lo
118var s_save_spi_init_hi = exec_hi
119
120var s_save_pc_lo = ttmp0 //{TTMP1, TTMP0} = {3'h0,pc_rewind[3:0], HT[0],trapID[7:0], PC[47:0]}
121var s_save_pc_hi = ttmp1
122var s_save_exec_lo = ttmp2
123var s_save_exec_hi = ttmp3
124var s_save_tmp = ttmp14
125var s_save_trapsts = ttmp15 //not really used until the end of the SAVE routine
126var s_save_xnack_mask_lo = ttmp6
127var s_save_xnack_mask_hi = ttmp7
128var s_save_buf_rsrc0 = ttmp8
129var s_save_buf_rsrc1 = ttmp9
130var s_save_buf_rsrc2 = ttmp10
131var s_save_buf_rsrc3 = ttmp11
132var s_save_status = ttmp12
133var s_save_mem_offset = ttmp4
134var s_save_alloc_size = s_save_trapsts //conflict
135var s_save_m0 = ttmp5
136var s_save_ttmps_lo = s_save_tmp //no conflict
137var s_save_ttmps_hi = s_save_trapsts //no conflict
138
139/* Restore */
140var S_RESTORE_BUF_RSRC_WORD1_STRIDE = S_SAVE_BUF_RSRC_WORD1_STRIDE
141var S_RESTORE_BUF_RSRC_WORD3_MISC = S_SAVE_BUF_RSRC_WORD3_MISC
142
143var S_RESTORE_SPI_INIT_ATC_MASK = 0x08000000 //bit[27]: ATC bit
144var S_RESTORE_SPI_INIT_ATC_SHIFT = 27
145var S_RESTORE_SPI_INIT_MTYPE_MASK = 0x70000000 //bit[30:28]: Mtype
146var S_RESTORE_SPI_INIT_MTYPE_SHIFT = 28
147var S_RESTORE_SPI_INIT_FIRST_WAVE_MASK = 0x04000000 //bit[26]: FirstWaveInTG
148var S_RESTORE_SPI_INIT_FIRST_WAVE_SHIFT = 26
149
150var S_RESTORE_PC_HI_RCNT_SHIFT = S_SAVE_PC_HI_RCNT_SHIFT
151var S_RESTORE_PC_HI_RCNT_MASK = S_SAVE_PC_HI_RCNT_MASK
152var S_RESTORE_PC_HI_FIRST_REPLAY_SHIFT = S_SAVE_PC_HI_FIRST_REPLAY_SHIFT
153var S_RESTORE_PC_HI_FIRST_REPLAY_MASK = S_SAVE_PC_HI_FIRST_REPLAY_MASK
154
155var s_restore_spi_init_lo = exec_lo
156var s_restore_spi_init_hi = exec_hi
157
158var s_restore_mem_offset = ttmp12
159var s_restore_tmp2 = ttmp13
160var s_restore_alloc_size = ttmp3
161var s_restore_tmp = ttmp2
162var s_restore_mem_offset_save = s_restore_tmp //no conflict
163var s_restore_accvgpr_offset_save = ttmp7
164
165var s_restore_m0 = s_restore_alloc_size //no conflict
166
167var s_restore_mode = s_restore_accvgpr_offset_save
168
169var s_restore_pc_lo = ttmp0
170var s_restore_pc_hi = ttmp1
171var s_restore_exec_lo = ttmp4
172var s_restore_exec_hi = ttmp5
173var s_restore_status = ttmp14
174var s_restore_trapsts = ttmp15
175var s_restore_xnack_mask_lo = xnack_mask_lo
176var s_restore_xnack_mask_hi = xnack_mask_hi
177var s_restore_buf_rsrc0 = ttmp8
178var s_restore_buf_rsrc1 = ttmp9
179var s_restore_buf_rsrc2 = ttmp10
180var s_restore_buf_rsrc3 = ttmp11
181var s_restore_ttmps_lo = s_restore_tmp //no conflict
182var s_restore_ttmps_hi = s_restore_alloc_size //no conflict
183
184/**************************************************************************/
185/* trap handler entry points */
186/**************************************************************************/
187/* Shader Main*/
188
189shader main
190 asic(DEFAULT)
191 type(CS)
192
193
194 s_branch L_SKIP_RESTORE //NOT restore. might be a regular trap or save
195
196L_JUMP_TO_RESTORE:
197 s_branch L_RESTORE //restore
198
199L_SKIP_RESTORE:
200
201 s_getreg_b32 s_save_status, hwreg(HW_REG_STATUS) //save STATUS since we will change SCC
202 s_andn2_b32 s_save_status, s_save_status, SQ_WAVE_STATUS_SPI_PRIO_MASK //check whether this is for save
203
204if SINGLE_STEP_MISSED_WORKAROUND
205 // No single step exceptions if MODE.DEBUG_EN=0.
206 s_getreg_b32 ttmp2, hwreg(HW_REG_MODE)
207 s_and_b32 ttmp2, ttmp2, SQ_WAVE_MODE_DEBUG_EN_MASK
208 s_cbranch_scc0 L_NO_SINGLE_STEP_WORKAROUND
209
210 // Second-level trap already handled exception if STATUS.HALT=1.
211 s_and_b32 ttmp2, s_save_status, SQ_WAVE_STATUS_HALT_MASK
212
213 // Prioritize single step exception over context save.
214 // Second-level trap will halt wave and RFE, re-entering for SAVECTX.
215 s_cbranch_scc0 L_FETCH_2ND_TRAP
216
217L_NO_SINGLE_STEP_WORKAROUND:
218end
219
220 s_getreg_b32 s_save_trapsts, hwreg(HW_REG_TRAPSTS)
221 s_and_b32 ttmp2, s_save_trapsts, SQ_WAVE_TRAPSTS_SAVECTX_MASK //check whether this is for save
222 s_cbranch_scc1 L_SAVE //this is the operation for save
223
224 // ********* Handle non-CWSR traps *******************
225
226 // Illegal instruction is a non-maskable exception which blocks context save.
227 // Halt the wavefront and return from the trap.
228 s_and_b32 ttmp2, s_save_trapsts, SQ_WAVE_TRAPSTS_ILLEGAL_INST_MASK
229 s_cbranch_scc1 L_HALT_WAVE
230
231 // If STATUS.MEM_VIOL is asserted then we cannot fetch from the TMA.
232 // Instead, halt the wavefront and return from the trap.
233 s_and_b32 ttmp2, s_save_trapsts, SQ_WAVE_TRAPSTS_MEM_VIOL_MASK
234 s_cbranch_scc0 L_FETCH_2ND_TRAP
235
236L_HALT_WAVE:
237 // If STATUS.HALT is set then this fault must come from SQC instruction fetch.
238 // We cannot prevent further faults. Spin wait until context saved.
239 s_and_b32 ttmp2, s_save_status, SQ_WAVE_STATUS_HALT_MASK
240 s_cbranch_scc0 L_NOT_ALREADY_HALTED
241
242L_WAIT_CTX_SAVE:
243 s_sleep 0x10
244 s_getreg_b32 ttmp2, hwreg(HW_REG_TRAPSTS)
245 s_and_b32 ttmp2, ttmp2, SQ_WAVE_TRAPSTS_SAVECTX_MASK
246 s_cbranch_scc0 L_WAIT_CTX_SAVE
247
248L_NOT_ALREADY_HALTED:
249 s_or_b32 s_save_status, s_save_status, SQ_WAVE_STATUS_HALT_MASK
250
251 // If the PC points to S_ENDPGM then context save will fail if STATUS.HALT is set.
252 // Rewind the PC to prevent this from occurring. The debugger compensates for this.
253 s_sub_u32 ttmp0, ttmp0, 0x8
254 s_subb_u32 ttmp1, ttmp1, 0x0
255
256L_FETCH_2ND_TRAP:
257 // Preserve and clear scalar XNACK state before issuing scalar reads.
258 // Save IB_STS.FIRST_REPLAY[15] and IB_STS.RCNT[20:16] into unused space ttmp11[31:26].
259 s_getreg_b32 ttmp2, hwreg(HW_REG_IB_STS)
260 s_and_b32 ttmp3, ttmp2, SQ_WAVE_IB_STS_RCNT_FIRST_REPLAY_MASK
261 s_lshl_b32 ttmp3, ttmp3, (TTMP11_SAVE_RCNT_FIRST_REPLAY_SHIFT - SQ_WAVE_IB_STS_FIRST_REPLAY_SHIFT)
262 s_andn2_b32 ttmp11, ttmp11, TTMP11_SAVE_RCNT_FIRST_REPLAY_MASK
263 s_or_b32 ttmp11, ttmp11, ttmp3
264
265 s_andn2_b32 ttmp2, ttmp2, SQ_WAVE_IB_STS_RCNT_FIRST_REPLAY_MASK
266 s_setreg_b32 hwreg(HW_REG_IB_STS), ttmp2
267
268 // Read second-level TBA/TMA from first-level TMA and jump if available.
269 // ttmp[2:5] and ttmp12 can be used (others hold SPI-initialized debug data)
270 // ttmp12 holds SQ_WAVE_STATUS
271 s_getreg_b32 ttmp14, hwreg(HW_REG_SQ_SHADER_TMA_LO)
272 s_getreg_b32 ttmp15, hwreg(HW_REG_SQ_SHADER_TMA_HI)
273 s_lshl_b64 [ttmp14, ttmp15], [ttmp14, ttmp15], 0x8
274 s_load_dwordx2 [ttmp2, ttmp3], [ttmp14, ttmp15], 0x0 glc:1 // second-level TBA
275 s_waitcnt lgkmcnt(0)
276 s_load_dwordx2 [ttmp14, ttmp15], [ttmp14, ttmp15], 0x8 glc:1 // second-level TMA
277 s_waitcnt lgkmcnt(0)
278 s_and_b64 [ttmp2, ttmp3], [ttmp2, ttmp3], [ttmp2, ttmp3]
279 s_cbranch_scc0 L_NO_NEXT_TRAP // second-level trap handler not been set
280 s_setpc_b64 [ttmp2, ttmp3] // jump to second-level trap handler
281
282L_NO_NEXT_TRAP:
283 s_getreg_b32 s_save_trapsts, hwreg(HW_REG_TRAPSTS)
284 s_and_b32 s_save_trapsts, s_save_trapsts, SQ_WAVE_TRAPSTS_EXCE_MASK // Check whether it is an exception
285 s_cbranch_scc1 L_EXCP_CASE // Exception, jump back to the shader program directly.
286 s_add_u32 ttmp0, ttmp0, 4 // S_TRAP case, add 4 to ttmp0
287 s_addc_u32 ttmp1, ttmp1, 0
288L_EXCP_CASE:
289 s_and_b32 ttmp1, ttmp1, 0xFFFF
290
291 // Restore SQ_WAVE_IB_STS.
292 s_lshr_b32 ttmp2, ttmp11, (TTMP11_SAVE_RCNT_FIRST_REPLAY_SHIFT - SQ_WAVE_IB_STS_FIRST_REPLAY_SHIFT)
293 s_and_b32 ttmp2, ttmp2, SQ_WAVE_IB_STS_RCNT_FIRST_REPLAY_MASK
294 s_setreg_b32 hwreg(HW_REG_IB_STS), ttmp2
295
296 // Restore SQ_WAVE_STATUS.
297 s_and_b64 exec, exec, exec // Restore STATUS.EXECZ, not writable by s_setreg_b32
298 s_and_b64 vcc, vcc, vcc // Restore STATUS.VCCZ, not writable by s_setreg_b32
299 set_status_without_spi_prio(s_save_status, ttmp2)
300
301 s_rfe_b64 [ttmp0, ttmp1]
302
303 // ********* End handling of non-CWSR traps *******************
304
305/**************************************************************************/
306/* save routine */
307/**************************************************************************/
308
309L_SAVE:
310 s_and_b32 s_save_pc_hi, s_save_pc_hi, 0x0000ffff //pc[47:32]
311
312 s_mov_b32 s_save_tmp, 0 //clear saveCtx bit
313 s_setreg_b32 hwreg(HW_REG_TRAPSTS, SQ_WAVE_TRAPSTS_SAVECTX_SHIFT, 1), s_save_tmp //clear saveCtx bit
314
315 s_getreg_b32 s_save_tmp, hwreg(HW_REG_IB_STS, SQ_WAVE_IB_STS_RCNT_SHIFT, SQ_WAVE_IB_STS_RCNT_SIZE) //save RCNT
316 s_lshl_b32 s_save_tmp, s_save_tmp, S_SAVE_PC_HI_RCNT_SHIFT
317 s_or_b32 s_save_pc_hi, s_save_pc_hi, s_save_tmp
318 s_getreg_b32 s_save_tmp, hwreg(HW_REG_IB_STS, SQ_WAVE_IB_STS_FIRST_REPLAY_SHIFT, SQ_WAVE_IB_STS_FIRST_REPLAY_SIZE) //save FIRST_REPLAY
319 s_lshl_b32 s_save_tmp, s_save_tmp, S_SAVE_PC_HI_FIRST_REPLAY_SHIFT
320 s_or_b32 s_save_pc_hi, s_save_pc_hi, s_save_tmp
321 s_getreg_b32 s_save_tmp, hwreg(HW_REG_IB_STS) //clear RCNT and FIRST_REPLAY in IB_STS
322 s_and_b32 s_save_tmp, s_save_tmp, SQ_WAVE_IB_STS_RCNT_FIRST_REPLAY_MASK_NEG
323
324 s_setreg_b32 hwreg(HW_REG_IB_STS), s_save_tmp
325
326 /* inform SPI the readiness and wait for SPI's go signal */
327 s_mov_b32 s_save_exec_lo, exec_lo //save EXEC and use EXEC for the go signal from SPI
328 s_mov_b32 s_save_exec_hi, exec_hi
329 s_mov_b64 exec, 0x0 //clear EXEC to get ready to receive
330
331 s_sendmsg sendmsg(MSG_SAVEWAVE) //send SPI a message and wait for SPI's write to EXEC
332
333 // Set SPI_PRIO=2 to avoid starving instruction fetch in the waves we're waiting for.
334 s_or_b32 s_save_tmp, s_save_status, (2 << SQ_WAVE_STATUS_SPI_PRIO_SHIFT)
335 s_setreg_b32 hwreg(HW_REG_STATUS), s_save_tmp
336
337 L_SLEEP:
338 s_sleep 0x2 // sleep 1 (64clk) is not enough for 8 waves per SIMD, which will cause SQ hang, since the 7,8th wave could not get arbit to exec inst, while other waves are stuck into the sleep-loop and waiting for wrexec!=0
339
340 s_cbranch_execz L_SLEEP
341
342 // Save trap temporaries 4-11, 13 initialized by SPI debug dispatch logic
343 // ttmp SR memory offset : size(VGPR)+size(SGPR)+0x40
344 get_vgpr_size_bytes(s_save_ttmps_lo)
345 get_sgpr_size_bytes(s_save_ttmps_hi)
346 s_add_u32 s_save_ttmps_lo, s_save_ttmps_lo, s_save_ttmps_hi
347 s_add_u32 s_save_ttmps_lo, s_save_ttmps_lo, s_save_spi_init_lo
348 s_addc_u32 s_save_ttmps_hi, s_save_spi_init_hi, 0x0
349 s_and_b32 s_save_ttmps_hi, s_save_ttmps_hi, 0xFFFF
350 s_store_dwordx4 [ttmp4, ttmp5, ttmp6, ttmp7], [s_save_ttmps_lo, s_save_ttmps_hi], 0x50 glc:1
351 ack_sqc_store_workaround()
352 s_store_dwordx4 [ttmp8, ttmp9, ttmp10, ttmp11], [s_save_ttmps_lo, s_save_ttmps_hi], 0x60 glc:1
353 ack_sqc_store_workaround()
354 s_store_dword ttmp13, [s_save_ttmps_lo, s_save_ttmps_hi], 0x74 glc:1
355 ack_sqc_store_workaround()
356
357 /* setup Resource Contants */
358 s_mov_b32 s_save_buf_rsrc0, s_save_spi_init_lo //base_addr_lo
359 s_and_b32 s_save_buf_rsrc1, s_save_spi_init_hi, 0x0000FFFF //base_addr_hi
360 s_or_b32 s_save_buf_rsrc1, s_save_buf_rsrc1, S_SAVE_BUF_RSRC_WORD1_STRIDE
361 s_mov_b32 s_save_buf_rsrc2, 0 //NUM_RECORDS initial value = 0 (in bytes) although not neccessarily inited
362 s_mov_b32 s_save_buf_rsrc3, S_SAVE_BUF_RSRC_WORD3_MISC
363 s_and_b32 s_save_tmp, s_save_spi_init_hi, S_SAVE_SPI_INIT_ATC_MASK
364 s_lshr_b32 s_save_tmp, s_save_tmp, (S_SAVE_SPI_INIT_ATC_SHIFT-SQ_BUF_RSRC_WORD1_ATC_SHIFT) //get ATC bit into position
365 s_or_b32 s_save_buf_rsrc3, s_save_buf_rsrc3, s_save_tmp //or ATC
366 s_and_b32 s_save_tmp, s_save_spi_init_hi, S_SAVE_SPI_INIT_MTYPE_MASK
367 s_lshr_b32 s_save_tmp, s_save_tmp, (S_SAVE_SPI_INIT_MTYPE_SHIFT-SQ_BUF_RSRC_WORD3_MTYPE_SHIFT) //get MTYPE bits into position
368 s_or_b32 s_save_buf_rsrc3, s_save_buf_rsrc3, s_save_tmp //or MTYPE
369
370 //FIXME right now s_save_m0/s_save_mem_offset use tma_lo/tma_hi (might need to save them before using them?)
371 s_mov_b32 s_save_m0, m0 //save M0
372
373 /* global mem offset */
374 s_mov_b32 s_save_mem_offset, 0x0 //mem offset initial value = 0
375
376
377
378
379 /* save HW registers */
380 //////////////////////////////
381
382 L_SAVE_HWREG:
383 // HWREG SR memory offset : size(VGPR)+size(SGPR)
384 get_vgpr_size_bytes(s_save_mem_offset)
385 get_sgpr_size_bytes(s_save_tmp)
386 s_add_u32 s_save_mem_offset, s_save_mem_offset, s_save_tmp
387
388
389 s_mov_b32 s_save_buf_rsrc2, 0x4 //NUM_RECORDS in bytes
390 s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
391
392
393 write_hwreg_to_mem(s_save_m0, s_save_buf_rsrc0, s_save_mem_offset) //M0
394 write_hwreg_to_mem(s_save_pc_lo, s_save_buf_rsrc0, s_save_mem_offset) //PC
395 write_hwreg_to_mem(s_save_pc_hi, s_save_buf_rsrc0, s_save_mem_offset)
396 write_hwreg_to_mem(s_save_exec_lo, s_save_buf_rsrc0, s_save_mem_offset) //EXEC
397 write_hwreg_to_mem(s_save_exec_hi, s_save_buf_rsrc0, s_save_mem_offset)
398 write_hwreg_to_mem(s_save_status, s_save_buf_rsrc0, s_save_mem_offset) //STATUS
399
400 //s_save_trapsts conflicts with s_save_alloc_size
401 s_getreg_b32 s_save_trapsts, hwreg(HW_REG_TRAPSTS)
402 write_hwreg_to_mem(s_save_trapsts, s_save_buf_rsrc0, s_save_mem_offset) //TRAPSTS
403
404 write_hwreg_to_mem(xnack_mask_lo, s_save_buf_rsrc0, s_save_mem_offset) //XNACK_MASK_LO
405 write_hwreg_to_mem(xnack_mask_hi, s_save_buf_rsrc0, s_save_mem_offset) //XNACK_MASK_HI
406
407 //use s_save_tmp would introduce conflict here between s_save_tmp and s_save_buf_rsrc2
408 s_getreg_b32 s_save_m0, hwreg(HW_REG_MODE) //MODE
409 write_hwreg_to_mem(s_save_m0, s_save_buf_rsrc0, s_save_mem_offset)
410
411
412
413 /* the first wave in the threadgroup */
414 s_and_b32 s_save_tmp, s_save_spi_init_hi, S_SAVE_SPI_INIT_FIRST_WAVE_MASK // extract fisrt wave bit
415 s_mov_b32 s_save_exec_hi, 0x0
416 s_or_b32 s_save_exec_hi, s_save_tmp, s_save_exec_hi // save first wave bit to s_save_exec_hi.bits[26]
417
418
419 /* save SGPRs */
420 // Save SGPR before LDS save, then the s0 to s4 can be used during LDS save...
421 //////////////////////////////
422
423 // SGPR SR memory offset : size(VGPR)
424 get_vgpr_size_bytes(s_save_mem_offset)
425 // TODO, change RSRC word to rearrange memory layout for SGPRS
426
427 s_getreg_b32 s_save_alloc_size, hwreg(HW_REG_GPR_ALLOC,SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SHIFT,SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SIZE) //spgr_size
428 s_add_u32 s_save_alloc_size, s_save_alloc_size, 1
429 s_lshl_b32 s_save_alloc_size, s_save_alloc_size, 4 //Number of SGPRs = (sgpr_size + 1) * 16 (non-zero value)
430
431 s_lshl_b32 s_save_buf_rsrc2, s_save_alloc_size, 2 //NUM_RECORDS in bytes
432
433 s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
434
435
436 // backup s_save_buf_rsrc0,1 to s_save_pc_lo/hi, since write_16sgpr_to_mem function will change the rsrc0
437 //s_mov_b64 s_save_pc_lo, s_save_buf_rsrc0
438 s_mov_b64 s_save_xnack_mask_lo, s_save_buf_rsrc0
439 s_add_u32 s_save_buf_rsrc0, s_save_buf_rsrc0, s_save_mem_offset
440 s_addc_u32 s_save_buf_rsrc1, s_save_buf_rsrc1, 0
441
442 s_mov_b32 m0, 0x0 //SGPR initial index value =0
443 s_nop 0x0 //Manually inserted wait states
444 L_SAVE_SGPR_LOOP:
445 // SGPR is allocated in 16 SGPR granularity
446 s_movrels_b64 s0, s0 //s0 = s[0+m0], s1 = s[1+m0]
447 s_movrels_b64 s2, s2 //s2 = s[2+m0], s3 = s[3+m0]
448 s_movrels_b64 s4, s4 //s4 = s[4+m0], s5 = s[5+m0]
449 s_movrels_b64 s6, s6 //s6 = s[6+m0], s7 = s[7+m0]
450 s_movrels_b64 s8, s8 //s8 = s[8+m0], s9 = s[9+m0]
451 s_movrels_b64 s10, s10 //s10 = s[10+m0], s11 = s[11+m0]
452 s_movrels_b64 s12, s12 //s12 = s[12+m0], s13 = s[13+m0]
453 s_movrels_b64 s14, s14 //s14 = s[14+m0], s15 = s[15+m0]
454
455 write_16sgpr_to_mem(s0, s_save_buf_rsrc0, s_save_mem_offset) //PV: the best performance should be using s_buffer_store_dwordx4
456 s_add_u32 m0, m0, 16 //next sgpr index
457 s_cmp_lt_u32 m0, s_save_alloc_size //scc = (m0 < s_save_alloc_size) ? 1 : 0
458 s_cbranch_scc1 L_SAVE_SGPR_LOOP //SGPR save is complete?
459 // restore s_save_buf_rsrc0,1
460 //s_mov_b64 s_save_buf_rsrc0, s_save_pc_lo
461 s_mov_b64 s_save_buf_rsrc0, s_save_xnack_mask_lo
462
463
464
465
466 /* save first 4 VGPR, then LDS save could use */
467 // each wave will alloc 4 vgprs at least...
468 /////////////////////////////////////////////////////////////////////////////////////
469
470 s_mov_b32 s_save_mem_offset, 0
471 s_mov_b32 exec_lo, 0xFFFFFFFF //need every thread from now on
472 s_mov_b32 exec_hi, 0xFFFFFFFF
473 s_mov_b32 xnack_mask_lo, 0x0
474 s_mov_b32 xnack_mask_hi, 0x0
475
476 s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
477
478
479 // VGPR Allocated in 4-GPR granularity
480
481if SAVE_AFTER_XNACK_ERROR
482 check_if_tcp_store_ok()
483 s_cbranch_scc1 L_SAVE_FIRST_VGPRS_WITH_TCP
484
485 write_vgprs_to_mem_with_sqc(v0, 4, s_save_buf_rsrc0, s_save_mem_offset)
486 s_branch L_SAVE_LDS
487
488L_SAVE_FIRST_VGPRS_WITH_TCP:
489end
490
491 write_4vgprs_to_mem(s_save_buf_rsrc0, s_save_mem_offset)
492
493 /* save LDS */
494 //////////////////////////////
495
496 L_SAVE_LDS:
497
498 // Change EXEC to all threads...
499 s_mov_b32 exec_lo, 0xFFFFFFFF //need every thread from now on
500 s_mov_b32 exec_hi, 0xFFFFFFFF
501
502 s_getreg_b32 s_save_alloc_size, hwreg(HW_REG_LDS_ALLOC,SQ_WAVE_LDS_ALLOC_LDS_SIZE_SHIFT,SQ_WAVE_LDS_ALLOC_LDS_SIZE_SIZE) //lds_size
503 s_and_b32 s_save_alloc_size, s_save_alloc_size, 0xFFFFFFFF //lds_size is zero?
504 s_cbranch_scc0 L_SAVE_LDS_DONE //no lds used? jump to L_SAVE_DONE
505
506 s_barrier //LDS is used? wait for other waves in the same TG
507 s_and_b32 s_save_tmp, s_save_exec_hi, S_SAVE_SPI_INIT_FIRST_WAVE_MASK //exec is still used here
508 s_cbranch_scc0 L_SAVE_LDS_DONE
509
510 // first wave do LDS save;
511
512 s_lshl_b32 s_save_alloc_size, s_save_alloc_size, 6 //LDS size in dwords = lds_size * 64dw
513 s_lshl_b32 s_save_alloc_size, s_save_alloc_size, 2 //LDS size in bytes
514 s_mov_b32 s_save_buf_rsrc2, s_save_alloc_size //NUM_RECORDS in bytes
515
516 // LDS at offset: size(VGPR)+SIZE(SGPR)+SIZE(HWREG)
517 //
518 get_vgpr_size_bytes(s_save_mem_offset)
519 get_sgpr_size_bytes(s_save_tmp)
520 s_add_u32 s_save_mem_offset, s_save_mem_offset, s_save_tmp
521 s_add_u32 s_save_mem_offset, s_save_mem_offset, get_hwreg_size_bytes()
522
523
524 s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
525
526 s_mov_b32 m0, 0x0 //lds_offset initial value = 0
527
528
529 v_mbcnt_lo_u32_b32 v2, 0xffffffff, 0x0
530 v_mbcnt_hi_u32_b32 v3, 0xffffffff, v2 // tid
531
532if SAVE_AFTER_XNACK_ERROR
533 check_if_tcp_store_ok()
534 s_cbranch_scc1 L_SAVE_LDS_WITH_TCP
535
536 v_lshlrev_b32 v2, 2, v3
537L_SAVE_LDS_LOOP_SQC:
538 ds_read2_b32 v[0:1], v2 offset0:0 offset1:0x40
539 s_waitcnt lgkmcnt(0)
540
541 write_vgprs_to_mem_with_sqc(v0, 2, s_save_buf_rsrc0, s_save_mem_offset)
542
543 v_add_u32 v2, 0x200, v2
544 v_cmp_lt_u32 vcc[0:1], v2, s_save_alloc_size
545 s_cbranch_vccnz L_SAVE_LDS_LOOP_SQC
546
547 s_branch L_SAVE_LDS_DONE
548
549L_SAVE_LDS_WITH_TCP:
550end
551
552 v_mul_i32_i24 v2, v3, 8 // tid*8
553 v_mov_b32 v3, 256*2
554 s_mov_b32 m0, 0x10000
555 s_mov_b32 s0, s_save_buf_rsrc3
556 s_and_b32 s_save_buf_rsrc3, s_save_buf_rsrc3, 0xFF7FFFFF // disable add_tid
557 s_or_b32 s_save_buf_rsrc3, s_save_buf_rsrc3, 0x58000 //DFMT
558
559L_SAVE_LDS_LOOP_VECTOR:
560 ds_read_b64 v[0:1], v2 //x =LDS[a], byte address
561 s_waitcnt lgkmcnt(0)
562 buffer_store_dwordx2 v[0:1], v2, s_save_buf_rsrc0, s_save_mem_offset offen:1 glc:1 slc:1
563// s_waitcnt vmcnt(0)
564// v_add_u32 v2, vcc[0:1], v2, v3
565 v_add_u32 v2, v2, v3
566 v_cmp_lt_u32 vcc[0:1], v2, s_save_alloc_size
567 s_cbranch_vccnz L_SAVE_LDS_LOOP_VECTOR
568
569 // restore rsrc3
570 s_mov_b32 s_save_buf_rsrc3, s0
571
572L_SAVE_LDS_DONE:
573
574
575 /* save VGPRs - set the Rest VGPRs */
576 //////////////////////////////////////////////////////////////////////////////////////
577 L_SAVE_VGPR:
578 // VGPR SR memory offset: 0
579 // TODO rearrange the RSRC words to use swizzle for VGPR save...
580
581 s_mov_b32 s_save_mem_offset, (0+256*4) // for the rest VGPRs
582 s_mov_b32 exec_lo, 0xFFFFFFFF //need every thread from now on
583 s_mov_b32 exec_hi, 0xFFFFFFFF
584
585 get_num_arch_vgprs(s_save_alloc_size)
586 s_mov_b32 s_save_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
587
588
589 // VGPR store using dw burst
590 s_mov_b32 m0, 0x4 //VGPR initial index value =0
591 s_cmp_lt_u32 m0, s_save_alloc_size
592 s_cbranch_scc0 L_SAVE_VGPR_END
593
594
595 s_set_gpr_idx_on m0, 0x1 //M0[7:0] = M0[7:0] and M0[15:12] = 0x1
596 s_add_u32 s_save_alloc_size, s_save_alloc_size, 0x1000 //add 0x1000 since we compare m0 against it later
597
598if SAVE_AFTER_XNACK_ERROR
599 check_if_tcp_store_ok()
600 s_cbranch_scc1 L_SAVE_VGPR_LOOP
601
602L_SAVE_VGPR_LOOP_SQC:
603 write_vgprs_to_mem_with_sqc(v0, 4, s_save_buf_rsrc0, s_save_mem_offset)
604
605 s_add_u32 m0, m0, 4
606 s_cmp_lt_u32 m0, s_save_alloc_size
607 s_cbranch_scc1 L_SAVE_VGPR_LOOP_SQC
608
609 s_set_gpr_idx_off
610 s_branch L_SAVE_VGPR_END
611end
612
613 L_SAVE_VGPR_LOOP:
614 v_mov_b32 v0, v0 //v0 = v[0+m0]
615 v_mov_b32 v1, v1 //v0 = v[0+m0]
616 v_mov_b32 v2, v2 //v0 = v[0+m0]
617 v_mov_b32 v3, v3 //v0 = v[0+m0]
618
619 write_4vgprs_to_mem(s_save_buf_rsrc0, s_save_mem_offset)
620
621 s_add_u32 m0, m0, 4 //next vgpr index
622 s_add_u32 s_save_mem_offset, s_save_mem_offset, 256*4 //every buffer_store_dword does 256 bytes
623 s_cmp_lt_u32 m0, s_save_alloc_size //scc = (m0 < s_save_alloc_size) ? 1 : 0
624 s_cbranch_scc1 L_SAVE_VGPR_LOOP //VGPR save is complete?
625 s_set_gpr_idx_off
626
627L_SAVE_VGPR_END:
628
629#if ASIC_FAMILY >= CHIP_ARCTURUS
630 // Save ACC VGPRs
631
632#if ASIC_FAMILY >= CHIP_ALDEBARAN
633 // ACC VGPR count may differ from ARCH VGPR count.
634 get_num_acc_vgprs(s_save_alloc_size, s_save_tmp)
635 s_and_b32 s_save_alloc_size, s_save_alloc_size, s_save_alloc_size
636 s_cbranch_scc0 L_SAVE_ACCVGPR_END
637 s_add_u32 s_save_alloc_size, s_save_alloc_size, 0x1000 //add 0x1000 since we compare m0 against it later
638#endif
639
640 s_mov_b32 m0, 0x0 //VGPR initial index value =0
641 s_set_gpr_idx_on m0, 0x1 //M0[7:0] = M0[7:0] and M0[15:12] = 0x1
642
643if SAVE_AFTER_XNACK_ERROR
644 check_if_tcp_store_ok()
645 s_cbranch_scc1 L_SAVE_ACCVGPR_LOOP
646
647L_SAVE_ACCVGPR_LOOP_SQC:
648 for var vgpr = 0; vgpr < 4; ++ vgpr
649 v_accvgpr_read v[vgpr], acc[vgpr] // v[N] = acc[N+m0]
650 end
651
652 write_vgprs_to_mem_with_sqc(v0, 4, s_save_buf_rsrc0, s_save_mem_offset)
653
654 s_add_u32 m0, m0, 4
655 s_cmp_lt_u32 m0, s_save_alloc_size
656 s_cbranch_scc1 L_SAVE_ACCVGPR_LOOP_SQC
657
658 s_set_gpr_idx_off
659 s_branch L_SAVE_ACCVGPR_END
660end
661
662L_SAVE_ACCVGPR_LOOP:
663 for var vgpr = 0; vgpr < 4; ++ vgpr
664 v_accvgpr_read v[vgpr], acc[vgpr] // v[N] = acc[N+m0]
665 end
666
667 write_4vgprs_to_mem(s_save_buf_rsrc0, s_save_mem_offset)
668
669 s_add_u32 m0, m0, 4
670 s_add_u32 s_save_mem_offset, s_save_mem_offset, 256*4
671 s_cmp_lt_u32 m0, s_save_alloc_size
672 s_cbranch_scc1 L_SAVE_ACCVGPR_LOOP
673 s_set_gpr_idx_off
674
675L_SAVE_ACCVGPR_END:
676#endif
677
678 s_branch L_END_PGM
679
680
681
682/**************************************************************************/
683/* restore routine */
684/**************************************************************************/
685
686L_RESTORE:
687 /* Setup Resource Contants */
688 s_mov_b32 s_restore_buf_rsrc0, s_restore_spi_init_lo //base_addr_lo
689 s_and_b32 s_restore_buf_rsrc1, s_restore_spi_init_hi, 0x0000FFFF //base_addr_hi
690 s_or_b32 s_restore_buf_rsrc1, s_restore_buf_rsrc1, S_RESTORE_BUF_RSRC_WORD1_STRIDE
691 s_mov_b32 s_restore_buf_rsrc2, 0 //NUM_RECORDS initial value = 0 (in bytes)
692 s_mov_b32 s_restore_buf_rsrc3, S_RESTORE_BUF_RSRC_WORD3_MISC
693 s_and_b32 s_restore_tmp, s_restore_spi_init_hi, S_RESTORE_SPI_INIT_ATC_MASK
694 s_lshr_b32 s_restore_tmp, s_restore_tmp, (S_RESTORE_SPI_INIT_ATC_SHIFT-SQ_BUF_RSRC_WORD1_ATC_SHIFT) //get ATC bit into position
695 s_or_b32 s_restore_buf_rsrc3, s_restore_buf_rsrc3, s_restore_tmp //or ATC
696 s_and_b32 s_restore_tmp, s_restore_spi_init_hi, S_RESTORE_SPI_INIT_MTYPE_MASK
697 s_lshr_b32 s_restore_tmp, s_restore_tmp, (S_RESTORE_SPI_INIT_MTYPE_SHIFT-SQ_BUF_RSRC_WORD3_MTYPE_SHIFT) //get MTYPE bits into position
698 s_or_b32 s_restore_buf_rsrc3, s_restore_buf_rsrc3, s_restore_tmp //or MTYPE
699
700 /* global mem offset */
701// s_mov_b32 s_restore_mem_offset, 0x0 //mem offset initial value = 0
702
703 /* the first wave in the threadgroup */
704 s_and_b32 s_restore_tmp, s_restore_spi_init_hi, S_RESTORE_SPI_INIT_FIRST_WAVE_MASK
705 s_cbranch_scc0 L_RESTORE_VGPR
706
707 /* restore LDS */
708 //////////////////////////////
709 L_RESTORE_LDS:
710
711 s_mov_b32 exec_lo, 0xFFFFFFFF //need every thread from now on //be consistent with SAVE although can be moved ahead
712 s_mov_b32 exec_hi, 0xFFFFFFFF
713
714 s_getreg_b32 s_restore_alloc_size, hwreg(HW_REG_LDS_ALLOC,SQ_WAVE_LDS_ALLOC_LDS_SIZE_SHIFT,SQ_WAVE_LDS_ALLOC_LDS_SIZE_SIZE) //lds_size
715 s_and_b32 s_restore_alloc_size, s_restore_alloc_size, 0xFFFFFFFF //lds_size is zero?
716 s_cbranch_scc0 L_RESTORE_VGPR //no lds used? jump to L_RESTORE_VGPR
717 s_lshl_b32 s_restore_alloc_size, s_restore_alloc_size, 6 //LDS size in dwords = lds_size * 64dw
718 s_lshl_b32 s_restore_alloc_size, s_restore_alloc_size, 2 //LDS size in bytes
719 s_mov_b32 s_restore_buf_rsrc2, s_restore_alloc_size //NUM_RECORDS in bytes
720
721 // LDS at offset: size(VGPR)+SIZE(SGPR)+SIZE(HWREG)
722 //
723 get_vgpr_size_bytes(s_restore_mem_offset)
724 get_sgpr_size_bytes(s_restore_tmp)
725 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, s_restore_tmp
726 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, get_hwreg_size_bytes() //FIXME, Check if offset overflow???
727
728
729 s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
730 s_mov_b32 m0, 0x0 //lds_offset initial value = 0
731
732 L_RESTORE_LDS_LOOP:
733 buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset lds:1 // first 64DW
734 buffer_load_dword v0, v0, s_restore_buf_rsrc0, s_restore_mem_offset lds:1 offset:256 // second 64DW
735 s_add_u32 m0, m0, 256*2 // 128 DW
736 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*2 //mem offset increased by 128DW
737 s_cmp_lt_u32 m0, s_restore_alloc_size //scc=(m0 < s_restore_alloc_size) ? 1 : 0
738 s_cbranch_scc1 L_RESTORE_LDS_LOOP //LDS restore is complete?
739
740
741 /* restore VGPRs */
742 //////////////////////////////
743 L_RESTORE_VGPR:
744 s_mov_b32 exec_lo, 0xFFFFFFFF //need every thread from now on //be consistent with SAVE although can be moved ahead
745 s_mov_b32 exec_hi, 0xFFFFFFFF
746 s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
747
748 // Save ARCH VGPRs 4-N, then all ACC VGPRs, then ARCH VGPRs 0-3.
749 get_num_arch_vgprs(s_restore_alloc_size)
750 s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 0x8000 //add 0x8000 since we compare m0 against it later
751
752 // ARCH VGPRs at offset: 0
753 s_mov_b32 s_restore_mem_offset, 0x0
754 s_mov_b32 s_restore_mem_offset_save, s_restore_mem_offset // restore start with v1, v0 will be the last
755 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4
756 s_mov_b32 m0, 4 //VGPR initial index value = 1
757 s_set_gpr_idx_on m0, 0x8 //M0[7:0] = M0[7:0] and M0[15:12] = 0x8
758
759 L_RESTORE_VGPR_LOOP:
760 read_4vgprs_from_mem(s_restore_buf_rsrc0, s_restore_mem_offset)
761 v_mov_b32 v0, v0 //v[0+m0] = v0
762 v_mov_b32 v1, v1
763 v_mov_b32 v2, v2
764 v_mov_b32 v3, v3
765 s_add_u32 m0, m0, 4 //next vgpr index
766 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4 //every buffer_load_dword does 256 bytes
767 s_cmp_lt_u32 m0, s_restore_alloc_size //scc = (m0 < s_restore_alloc_size) ? 1 : 0
768 s_cbranch_scc1 L_RESTORE_VGPR_LOOP //VGPR restore (except v0) is complete?
769
770#if ASIC_FAMILY >= CHIP_ALDEBARAN
771 // ACC VGPR count may differ from ARCH VGPR count.
772 get_num_acc_vgprs(s_restore_alloc_size, s_restore_tmp2)
773 s_and_b32 s_restore_alloc_size, s_restore_alloc_size, s_restore_alloc_size
774 s_cbranch_scc0 L_RESTORE_ACCVGPR_END
775 s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 0x8000 //add 0x8000 since we compare m0 against it later
776#endif
777
778#if ASIC_FAMILY >= CHIP_ARCTURUS
779 // ACC VGPRs at offset: size(ARCH VGPRs)
780 s_mov_b32 m0, 0
781 s_set_gpr_idx_on m0, 0x8 //M0[7:0] = M0[7:0] and M0[15:12] = 0x8
782
783 L_RESTORE_ACCVGPR_LOOP:
784 read_4vgprs_from_mem(s_restore_buf_rsrc0, s_restore_mem_offset)
785
786 for var vgpr = 0; vgpr < 4; ++ vgpr
787 v_accvgpr_write acc[vgpr], v[vgpr]
788 end
789
790 s_add_u32 m0, m0, 4 //next vgpr index
791 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, 256*4 //every buffer_load_dword does 256 bytes
792 s_cmp_lt_u32 m0, s_restore_alloc_size //scc = (m0 < s_restore_alloc_size) ? 1 : 0
793 s_cbranch_scc1 L_RESTORE_ACCVGPR_LOOP //VGPR restore (except v0) is complete?
794 L_RESTORE_ACCVGPR_END:
795#endif
796
797 s_set_gpr_idx_off
798
799 // Restore VGPRs 0-3 last, no longer needed.
800 read_4vgprs_from_mem(s_restore_buf_rsrc0, s_restore_mem_offset_save)
801
802 /* restore SGPRs */
803 //////////////////////////////
804
805 // SGPR SR memory offset : size(VGPR)
806 get_vgpr_size_bytes(s_restore_mem_offset)
807 get_sgpr_size_bytes(s_restore_tmp)
808 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, s_restore_tmp
809 s_sub_u32 s_restore_mem_offset, s_restore_mem_offset, 16*4 // restore SGPR from S[n] to S[0], by 16 sgprs group
810 // TODO, change RSRC word to rearrange memory layout for SGPRS
811
812 s_getreg_b32 s_restore_alloc_size, hwreg(HW_REG_GPR_ALLOC,SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SHIFT,SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SIZE) //spgr_size
813 s_add_u32 s_restore_alloc_size, s_restore_alloc_size, 1
814 s_lshl_b32 s_restore_alloc_size, s_restore_alloc_size, 4 //Number of SGPRs = (sgpr_size + 1) * 16 (non-zero value)
815
816 s_lshl_b32 s_restore_buf_rsrc2, s_restore_alloc_size, 2 //NUM_RECORDS in bytes
817 s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
818
819 s_mov_b32 m0, s_restore_alloc_size
820
821 L_RESTORE_SGPR_LOOP:
822 read_16sgpr_from_mem(s0, s_restore_buf_rsrc0, s_restore_mem_offset) //PV: further performance improvement can be made
823 s_waitcnt lgkmcnt(0) //ensure data ready
824
825 s_sub_u32 m0, m0, 16 // Restore from S[n] to S[0]
826 s_nop 0 // hazard SALU M0=> S_MOVREL
827
828 s_movreld_b64 s0, s0 //s[0+m0] = s0
829 s_movreld_b64 s2, s2
830 s_movreld_b64 s4, s4
831 s_movreld_b64 s6, s6
832 s_movreld_b64 s8, s8
833 s_movreld_b64 s10, s10
834 s_movreld_b64 s12, s12
835 s_movreld_b64 s14, s14
836
837 s_cmp_eq_u32 m0, 0 //scc = (m0 < s_restore_alloc_size) ? 1 : 0
838 s_cbranch_scc0 L_RESTORE_SGPR_LOOP //SGPR restore (except s0) is complete?
839
840 /* restore HW registers */
841 //////////////////////////////
842 L_RESTORE_HWREG:
843
844
845 // HWREG SR memory offset : size(VGPR)+size(SGPR)
846 get_vgpr_size_bytes(s_restore_mem_offset)
847 get_sgpr_size_bytes(s_restore_tmp)
848 s_add_u32 s_restore_mem_offset, s_restore_mem_offset, s_restore_tmp
849
850
851 s_mov_b32 s_restore_buf_rsrc2, 0x4 //NUM_RECORDS in bytes
852 s_mov_b32 s_restore_buf_rsrc2, 0x1000000 //NUM_RECORDS in bytes
853
854 read_hwreg_from_mem(s_restore_m0, s_restore_buf_rsrc0, s_restore_mem_offset) //M0
855 read_hwreg_from_mem(s_restore_pc_lo, s_restore_buf_rsrc0, s_restore_mem_offset) //PC
856 read_hwreg_from_mem(s_restore_pc_hi, s_restore_buf_rsrc0, s_restore_mem_offset)
857 read_hwreg_from_mem(s_restore_exec_lo, s_restore_buf_rsrc0, s_restore_mem_offset) //EXEC
858 read_hwreg_from_mem(s_restore_exec_hi, s_restore_buf_rsrc0, s_restore_mem_offset)
859 read_hwreg_from_mem(s_restore_status, s_restore_buf_rsrc0, s_restore_mem_offset) //STATUS
860 read_hwreg_from_mem(s_restore_trapsts, s_restore_buf_rsrc0, s_restore_mem_offset) //TRAPSTS
861 read_hwreg_from_mem(xnack_mask_lo, s_restore_buf_rsrc0, s_restore_mem_offset) //XNACK_MASK_LO
862 read_hwreg_from_mem(xnack_mask_hi, s_restore_buf_rsrc0, s_restore_mem_offset) //XNACK_MASK_HI
863 read_hwreg_from_mem(s_restore_mode, s_restore_buf_rsrc0, s_restore_mem_offset) //MODE
864
865 s_waitcnt lgkmcnt(0) //from now on, it is safe to restore STATUS and IB_STS
866
867 s_mov_b32 m0, s_restore_m0
868 s_mov_b32 exec_lo, s_restore_exec_lo
869 s_mov_b32 exec_hi, s_restore_exec_hi
870
871 s_and_b32 s_restore_m0, SQ_WAVE_TRAPSTS_PRE_SAVECTX_MASK, s_restore_trapsts
872 s_setreg_b32 hwreg(HW_REG_TRAPSTS, SQ_WAVE_TRAPSTS_PRE_SAVECTX_SHIFT, SQ_WAVE_TRAPSTS_PRE_SAVECTX_SIZE), s_restore_m0
873 s_and_b32 s_restore_m0, SQ_WAVE_TRAPSTS_POST_SAVECTX_MASK, s_restore_trapsts
874 s_lshr_b32 s_restore_m0, s_restore_m0, SQ_WAVE_TRAPSTS_POST_SAVECTX_SHIFT
875 s_setreg_b32 hwreg(HW_REG_TRAPSTS, SQ_WAVE_TRAPSTS_POST_SAVECTX_SHIFT, SQ_WAVE_TRAPSTS_POST_SAVECTX_SIZE), s_restore_m0
876 //s_setreg_b32 hwreg(HW_REG_TRAPSTS), s_restore_trapsts //don't overwrite SAVECTX bit as it may be set through external SAVECTX during restore
877 s_setreg_b32 hwreg(HW_REG_MODE), s_restore_mode
878
879 // Restore trap temporaries 4-11, 13 initialized by SPI debug dispatch logic
880 // ttmp SR memory offset : size(VGPR)+size(SGPR)+0x40
881 get_vgpr_size_bytes(s_restore_ttmps_lo)
882 get_sgpr_size_bytes(s_restore_ttmps_hi)
883 s_add_u32 s_restore_ttmps_lo, s_restore_ttmps_lo, s_restore_ttmps_hi
884 s_add_u32 s_restore_ttmps_lo, s_restore_ttmps_lo, s_restore_buf_rsrc0
885 s_addc_u32 s_restore_ttmps_hi, s_restore_buf_rsrc1, 0x0
886 s_and_b32 s_restore_ttmps_hi, s_restore_ttmps_hi, 0xFFFF
887 s_load_dwordx4 [ttmp4, ttmp5, ttmp6, ttmp7], [s_restore_ttmps_lo, s_restore_ttmps_hi], 0x50 glc:1
888 s_load_dwordx4 [ttmp8, ttmp9, ttmp10, ttmp11], [s_restore_ttmps_lo, s_restore_ttmps_hi], 0x60 glc:1
889 s_load_dword ttmp13, [s_restore_ttmps_lo, s_restore_ttmps_hi], 0x74 glc:1
890 s_waitcnt lgkmcnt(0)
891
892 //reuse s_restore_m0 as a temp register
893 s_and_b32 s_restore_m0, s_restore_pc_hi, S_SAVE_PC_HI_RCNT_MASK
894 s_lshr_b32 s_restore_m0, s_restore_m0, S_SAVE_PC_HI_RCNT_SHIFT
895 s_lshl_b32 s_restore_m0, s_restore_m0, SQ_WAVE_IB_STS_RCNT_SHIFT
896 s_mov_b32 s_restore_tmp, 0x0 //IB_STS is zero
897 s_or_b32 s_restore_tmp, s_restore_tmp, s_restore_m0
898 s_and_b32 s_restore_m0, s_restore_pc_hi, S_SAVE_PC_HI_FIRST_REPLAY_MASK
899 s_lshr_b32 s_restore_m0, s_restore_m0, S_SAVE_PC_HI_FIRST_REPLAY_SHIFT
900 s_lshl_b32 s_restore_m0, s_restore_m0, SQ_WAVE_IB_STS_FIRST_REPLAY_SHIFT
901 s_or_b32 s_restore_tmp, s_restore_tmp, s_restore_m0
902 s_and_b32 s_restore_m0, s_restore_status, SQ_WAVE_STATUS_INST_ATC_MASK
903 s_lshr_b32 s_restore_m0, s_restore_m0, SQ_WAVE_STATUS_INST_ATC_SHIFT
904 s_setreg_b32 hwreg(HW_REG_IB_STS), s_restore_tmp
905
906 s_and_b32 s_restore_pc_hi, s_restore_pc_hi, 0x0000ffff //pc[47:32] //Do it here in order not to affect STATUS
907 s_and_b64 exec, exec, exec // Restore STATUS.EXECZ, not writable by s_setreg_b32
908 s_and_b64 vcc, vcc, vcc // Restore STATUS.VCCZ, not writable by s_setreg_b32
909 set_status_without_spi_prio(s_restore_status, s_restore_tmp) // SCC is included, which is changed by previous salu
910
911 s_barrier //barrier to ensure the readiness of LDS before access attempts from any other wave in the same TG //FIXME not performance-optimal at this time
912
913// s_rfe_b64 s_restore_pc_lo //Return to the main shader program and resume execution
914 s_rfe_restore_b64 s_restore_pc_lo, s_restore_m0 // s_restore_m0[0] is used to set STATUS.inst_atc
915
916
917/**************************************************************************/
918/* the END */
919/**************************************************************************/
920L_END_PGM:
921 s_endpgm
922
923end
924
925
926/**************************************************************************/
927/* the helper functions */
928/**************************************************************************/
929
930//Only for save hwreg to mem
931function write_hwreg_to_mem(s, s_rsrc, s_mem_offset)
932 s_mov_b32 exec_lo, m0 //assuming exec_lo is not needed anymore from this point on
933 s_mov_b32 m0, s_mem_offset
934 s_buffer_store_dword s, s_rsrc, m0 glc:1
935 ack_sqc_store_workaround()
936 s_add_u32 s_mem_offset, s_mem_offset, 4
937 s_mov_b32 m0, exec_lo
938end
939
940
941// HWREG are saved before SGPRs, so all HWREG could be use.
942function write_16sgpr_to_mem(s, s_rsrc, s_mem_offset)
943
944 s_buffer_store_dwordx4 s[0], s_rsrc, 0 glc:1
945 ack_sqc_store_workaround()
946 s_buffer_store_dwordx4 s[4], s_rsrc, 16 glc:1
947 ack_sqc_store_workaround()
948 s_buffer_store_dwordx4 s[8], s_rsrc, 32 glc:1
949 ack_sqc_store_workaround()
950 s_buffer_store_dwordx4 s[12], s_rsrc, 48 glc:1
951 ack_sqc_store_workaround()
952 s_add_u32 s_rsrc[0], s_rsrc[0], 4*16
953 s_addc_u32 s_rsrc[1], s_rsrc[1], 0x0 // +scc
954end
955
956
957function read_hwreg_from_mem(s, s_rsrc, s_mem_offset)
958 s_buffer_load_dword s, s_rsrc, s_mem_offset glc:1
959 s_add_u32 s_mem_offset, s_mem_offset, 4
960end
961
962function read_16sgpr_from_mem(s, s_rsrc, s_mem_offset)
963 s_buffer_load_dwordx16 s, s_rsrc, s_mem_offset glc:1
964 s_sub_u32 s_mem_offset, s_mem_offset, 4*16
965end
966
967function check_if_tcp_store_ok
968 // If STATUS.ALLOW_REPLAY=0 and TRAPSTS.XNACK_ERROR=1 then TCP stores will fail.
969 s_and_b32 s_save_tmp, s_save_status, SQ_WAVE_STATUS_ALLOW_REPLAY_MASK
970 s_cbranch_scc1 L_TCP_STORE_CHECK_DONE
971
972 s_getreg_b32 s_save_tmp, hwreg(HW_REG_TRAPSTS)
973 s_andn2_b32 s_save_tmp, SQ_WAVE_TRAPSTS_XNACK_ERROR_MASK, s_save_tmp
974
975L_TCP_STORE_CHECK_DONE:
976end
977
978function write_4vgprs_to_mem(s_rsrc, s_mem_offset)
979 buffer_store_dword v0, v0, s_rsrc, s_mem_offset slc:1 glc:1
980 buffer_store_dword v1, v0, s_rsrc, s_mem_offset slc:1 glc:1 offset:256
981 buffer_store_dword v2, v0, s_rsrc, s_mem_offset slc:1 glc:1 offset:256*2
982 buffer_store_dword v3, v0, s_rsrc, s_mem_offset slc:1 glc:1 offset:256*3
983end
984
985function read_4vgprs_from_mem(s_rsrc, s_mem_offset)
986 buffer_load_dword v0, v0, s_rsrc, s_mem_offset slc:1 glc:1
987 buffer_load_dword v1, v0, s_rsrc, s_mem_offset slc:1 glc:1 offset:256
988 buffer_load_dword v2, v0, s_rsrc, s_mem_offset slc:1 glc:1 offset:256*2
989 buffer_load_dword v3, v0, s_rsrc, s_mem_offset slc:1 glc:1 offset:256*3
990 s_waitcnt vmcnt(0)
991end
992
993function write_vgpr_to_mem_with_sqc(v, s_rsrc, s_mem_offset)
994 s_mov_b32 s4, 0
995
996L_WRITE_VGPR_LANE_LOOP:
997 for var lane = 0; lane < 4; ++ lane
998 v_readlane_b32 s[lane], v, s4
999 s_add_u32 s4, s4, 1
1000 end
1001
1002 s_buffer_store_dwordx4 s[0:3], s_rsrc, s_mem_offset glc:1
1003 ack_sqc_store_workaround()
1004
1005 s_add_u32 s_mem_offset, s_mem_offset, 0x10
1006 s_cmp_eq_u32 s4, 0x40
1007 s_cbranch_scc0 L_WRITE_VGPR_LANE_LOOP
1008end
1009
1010function write_vgprs_to_mem_with_sqc(v, n_vgprs, s_rsrc, s_mem_offset)
1011 for var vgpr = 0; vgpr < n_vgprs; ++ vgpr
1012 write_vgpr_to_mem_with_sqc(v[vgpr], s_rsrc, s_mem_offset)
1013 end
1014end
1015
1016function get_lds_size_bytes(s_lds_size_byte)
1017 // SQ LDS granularity is 64DW, while PGM_RSRC2.lds_size is in granularity 128DW
1018 s_getreg_b32 s_lds_size_byte, hwreg(HW_REG_LDS_ALLOC, SQ_WAVE_LDS_ALLOC_LDS_SIZE_SHIFT, SQ_WAVE_LDS_ALLOC_LDS_SIZE_SIZE) // lds_size
1019 s_lshl_b32 s_lds_size_byte, s_lds_size_byte, 8 //LDS size in dwords = lds_size * 64 *4Bytes // granularity 64DW
1020end
1021
1022function get_vgpr_size_bytes(s_vgpr_size_byte)
1023 s_getreg_b32 s_vgpr_size_byte, hwreg(HW_REG_GPR_ALLOC,SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SHIFT,SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SIZE) //vpgr_size
1024 s_add_u32 s_vgpr_size_byte, s_vgpr_size_byte, 1
1025 s_lshl_b32 s_vgpr_size_byte, s_vgpr_size_byte, (2+8) //Number of VGPRs = (vgpr_size + 1) * 4 * 64 * 4 (non-zero value) //FIXME for GFX, zero is possible
1026
1027#if ASIC_FAMILY >= CHIP_ARCTURUS
1028 s_lshl_b32 s_vgpr_size_byte, s_vgpr_size_byte, 1 // Double size for ACC VGPRs
1029#endif
1030end
1031
1032function get_sgpr_size_bytes(s_sgpr_size_byte)
1033 s_getreg_b32 s_sgpr_size_byte, hwreg(HW_REG_GPR_ALLOC,SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SHIFT,SQ_WAVE_GPR_ALLOC_SGPR_SIZE_SIZE) //spgr_size
1034 s_add_u32 s_sgpr_size_byte, s_sgpr_size_byte, 1
1035 s_lshl_b32 s_sgpr_size_byte, s_sgpr_size_byte, 6 //Number of SGPRs = (sgpr_size + 1) * 16 *4 (non-zero value)
1036end
1037
1038function get_hwreg_size_bytes
1039 return 128 //HWREG size 128 bytes
1040end
1041
1042function get_num_arch_vgprs(s_num_arch_vgprs)
1043#if ASIC_FAMILY >= CHIP_ALDEBARAN
1044 // VGPR count includes ACC VGPRs, use ACC VGPR offset for ARCH VGPR count.
1045 s_getreg_b32 s_num_arch_vgprs, hwreg(HW_REG_GPR_ALLOC,SQ_WAVE_GPR_ALLOC_ACCV_OFFSET_SHIFT,SQ_WAVE_GPR_ALLOC_ACCV_OFFSET_SIZE)
1046#else
1047 s_getreg_b32 s_num_arch_vgprs, hwreg(HW_REG_GPR_ALLOC,SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SHIFT,SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SIZE)
1048#endif
1049
1050 // Number of VGPRs = (vgpr_size + 1) * 4
1051 s_add_u32 s_num_arch_vgprs, s_num_arch_vgprs, 1
1052 s_lshl_b32 s_num_arch_vgprs, s_num_arch_vgprs, 2
1053end
1054
1055#if ASIC_FAMILY >= CHIP_ALDEBARAN
1056function get_num_acc_vgprs(s_num_acc_vgprs, s_tmp)
1057 // VGPR count = (GPR_ALLOC.VGPR_SIZE + 1) * 8
1058 s_getreg_b32 s_num_acc_vgprs, hwreg(HW_REG_GPR_ALLOC,SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SHIFT,SQ_WAVE_GPR_ALLOC_VGPR_SIZE_SIZE)
1059 s_add_u32 s_num_acc_vgprs, s_num_acc_vgprs, 1
1060 s_lshl_b32 s_num_acc_vgprs, s_num_acc_vgprs, 3
1061
1062 // ACC VGPR count = VGPR count - ARCH VGPR count.
1063 get_num_arch_vgprs(s_tmp)
1064 s_sub_u32 s_num_acc_vgprs, s_num_acc_vgprs, s_tmp
1065end
1066#endif
1067
1068function ack_sqc_store_workaround
1069 if ACK_SQC_STORE
1070 s_waitcnt lgkmcnt(0)
1071 end
1072end
1073
1074function set_status_without_spi_prio(status, tmp)
1075 // Do not restore STATUS.SPI_PRIO since scheduler may have raised it.
1076 s_lshr_b32 tmp, status, SQ_WAVE_STATUS_POST_SPI_PRIO_SHIFT
1077 s_setreg_b32 hwreg(HW_REG_STATUS, SQ_WAVE_STATUS_POST_SPI_PRIO_SHIFT, SQ_WAVE_STATUS_POST_SPI_PRIO_SIZE), tmp
1078 s_nop 0x2 // avoid S_SETREG => S_SETREG hazard
1079 s_setreg_b32 hwreg(HW_REG_STATUS, SQ_WAVE_STATUS_PRE_SPI_PRIO_SHIFT, SQ_WAVE_STATUS_PRE_SPI_PRIO_SIZE), status
1080end