This section shows fragments of code, and associated data from one of the architectural tests in the repository. For the individual fragments the ingress signals are shown and the corresponding packets generated. It further shows how the packets are transported via on-chip transport fabric. The fragments shown below are extracted from the test whilst it is being executed. In order to give some context to the fragment of interest, code prior to and after the fragment is also given.
In this example the test executes an illegal opcode (at line labelled 14) and traps. We show the output from the patched spike execution in line 30. The input signals to the encoder are shown in lines labelled 38-46. The HART will have set the signals shown in line 42 when the illegal instruction is executed and as can be seen it is not retired. Lines labelled 53, 56 and 59 show the packets output from the encoder for this fragment.
1: *************************************************************************************
2: ****************** Fragment 0x80000222 - 0x80000226:illegal_opcode ******************
3: *************************************************************************************
4: KEY: ">" means pre-fragment execution, "<" means post-fragment execution
5: ^^^^^^^^^^^^^^^^^^^^^^^^^^ Part 1 of 1 ^^^^^^^^^^^^^^^^^^^^^^^^^^
6:
7: elf:
8: > 0000000080000104 <j_exception_stimulus>:
9: > 80000104: 00000297 auipc t0,0x0
10: > 80000108: 11e28293 addi t0,t0,286 # 80000222 <bad_opcode>
11: > 8000010c: 8282 jr t0
12: > 80000154: 9282 jalr t0
13: 0000000080000222 <bad_opcode>:
14: 80000222: 0000 unimp
15: 80000224: 0000 unimp
16: 80000226: b709 j 80000128 <j_target_end_fail>
17: < 00000000800001b0 <machine_trap_entry>:
18: < 800001b0: a805 j 800001e0 <machine_trap_entry_0>
19: < 00000000800001e0 <machine_trap_entry_0>:
20: < 800001e0: 342023f3 csrr t2,mcause
21: < 800001e4: fff0031b addiw t1,zero,-1
22: < 800001e8: 137e slli t1,t1,0x3f
23:
24: trace_spike:
25: ******** Data from br_j_asm.spike_pc_trace line 5029 ********
26: > ADDRESS=80000154, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
27: > ADDRESS=80000104, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
28: > ADDRESS=80000108, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
29: > ADDRESS=8000010c, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
30: ADDRESS=80000222, PRIVILEGE=3, EXCEPTION=1, ECAUSE=2, TVAL=0, INTERRUPT=0
31: < ADDRESS=800001b0, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
32: < ADDRESS=800001e0, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
33: < ADDRESS=800001e4, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
34: < ADDRESS=800001e8, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
35:
36: encoder_input:
37: ******** Data from br_j_asm.encoder_input line 5029 ********
38: > UNINFERABLE_JUMP, cause=0, tval=0, priv=3, iaddr_0=80000154, context=0, ctype=0, ilastsize_0=2
39: > ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=80000104, context=0, ctype=0, ilastsize_0=4
40: > ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=80000108, context=0, ctype=0, ilastsize_0=4
41: > UNINFERABLE_JUMP, cause=0, tval=0, priv=3, iaddr_0=8000010c, context=0, ctype=0, ilastsize_0=2
42: EXCEPTION, cause=2, tval=0, priv=3, iaddr_0=80000222, context=0, ctype=0, ilastsize_0=2,
----------> NOT RETIRED
43: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001b0, context=0, ctype=0, ilastsize_0=2
44: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001e0, context=0, ctype=0, ilastsize_0=4
45: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001e4, context=0, ctype=0, ilastsize_0=4
46: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001e8, context=0, ctype=0, ilastsize_0=2
47:
48: te_inst:
49: ******** Data from br_j_asm.te_inst_annotated line 5071 ********
50: > next=80000154 curr=80000150 prev=8000014c
51: > next=80000104 curr=80000154 prev=80000150
52: > next=80000108 curr=80000104 prev=80000154
53: > format=1, address=80000104, branches=1, branch_map=0, irreport=0, notify=0, updiscon=0,
Reason[prev_updiscon] Payload[05 04 01 00 80 00]
54: > next=8000010c curr=80000108 prev=80000104
55: next=80000222 curr=8000010c prev=80000108
56: format=2, address=8000010c, irreport=0, notify=0, updiscon=0, Reason[exc_only]
Payload[32 04 00 00 02]
57: < next=800001b0 curr=80000222 prev=8000010c
58: < format=3, subformat=TRAP, address=80000222, branch=1, context=0, ecause=2, interrupt=0,
privilege=3, thaddr=0, tval=0, Reason[prev_updiscon, curr_exc_only]
Payload[77 00 00 00 00 81 88 00 00 20]
59: < format=3, subformat=START, address=800001b0, branch=1, context=0,
privilege=3, Reason[exception_prev, reported]
Payload[73 00 00 00 00 6c 00 00 10]
60: < next=800001e4 curr=800001e0 prev=800001b0
61: < next=800001e8 curr=800001e4 prev=800001e0
The output from the encoder for the fragment of interest is given in line 56. The least significant byte is output first, this means 32 is byte 0, 04 is byte 1 and and the final value 02 is byte 4.
The packet format is given in [fig:packet-format]. So this means the packet will be packed as follows:
-
Header - 1 byte
-
Index - N bits. As an example use 6 bits and the value of 1.
-
Optional Siemens timestamp - 2 bytes. This example has no timestamp
-
A type field for the packet of 2 bits ’01’ meaning instruction trace
-
Payload - [32 04 00 00 02]
Since the Siemens transport is byte stream based the data seen will be:
[0x05][0x41][0x32 0x04 0x00 0x00 0x02]
1: **************************************************************************************
2: ****************** Fragment 0x800001a2 - 0x800001b0:timer_long_loop ******************
3: **************************************************************************************
4: KEY: ">" means pre-fragment execution, "<" means post-fragment execution
5: ^^^^^^^^^^^^^^^^^^^^^^^^^^ Part 443 of 445 ^^^^^^^^^^^^^^^^^^^^^^^^^^
6:
7: elf:
8: > 80000194: fab50ce3 beq a0,a1,8000014c <timer_interrupt_return>
9: > 80000198: 40430333 sub t1,t1,tp
10: > 8000019c: 34402473 csrr s0,mip
11: > 800001a0: 8c21 xor s0,s0,s0
12: 800001a2: 300024f3 csrr s1,mstatus
13: 800001a6: 8ca5 xor s1,s1,s1
14: 800001a8: fe0310e3 bnez t1,80000188 <timer_interrupt_long_loop>
15: 800001ac: bfb5 j 80000128 <j_target_end_fail>
16: 800001ae: 0001 nop
17: 00000000800001b0 <machine_trap_entry>:
18: 800001b0: a805 j 800001e0 <machine_trap_entry_0>
19: < 00000000800001e0 <machine_trap_entry_0>:
20: < 800001e0: 342023f3 csrr t2,mcause
21: < 800001e4: fff0031b addiw t1,zero,-1
22: < 800001e8: 137e slli t1,t1,0x3f
23: < 800001ea: 031d addi t1,t1,7
24:
25: trace_spike:
26: ******** Data from br_j_asm.spike_pc_trace line 5000 ********
27: > ADDRESS=80000194, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
28: > ADDRESS=80000198, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
29: > ADDRESS=8000019c, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
30: > ADDRESS=800001a0, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
31: ADDRESS=800001a2, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
32: ADDRESS=800001a6, PRIVILEGE=3, EXCEPTION=1, ECAUSE=8000000000000007, TVAL=0, INTERRUPT=1
33: ADDRESS=800001b0, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
34: < ADDRESS=800001e0, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
35: < ADDRESS=800001e4, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
36: < ADDRESS=800001e8, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
37: < ADDRESS=800001ea, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
38:
39: encoder_input:
40: ******** Data from br_j_asm.encoder_input line 5000 ********
41: > NONTAKEN_BRANCH, cause=0, tval=0, priv=3, iaddr_0=80000194, context=0, ctype=0, ilastsize_0=4
42: > ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=80000198, context=0, ctype=0, ilastsize_0=4
43: > ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=8000019c, context=0, ctype=0, ilastsize_0=4
44: > ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001a0, context=0, ctype=0, ilastsize_0=2
45: ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001a2, context=0, ctype=0, ilastsize_0=4
46: INTERRUPT, cause=7, tval=0, priv=3, iaddr_0=800001a6, context=0, ctype=0, ilastsize_0=2,
----------> NOT RETIRED
47: ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001b0, context=0, ctype=0, ilastsize_0=2
48: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001e0, context=0, ctype=0, ilastsize_0=4
49: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001e4, context=0, ctype=0, ilastsize_0=4
50: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001e8, context=0, ctype=0, ilastsize_0=2
51: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=800001ea, context=0, ctype=0, ilastsize_0=2
52:
53: te_inst:
54: ******** Data from br_j_asm.te_inst_annotated line 5038 ********
55: > next=80000194 curr=80000192 prev=80000190
56: > next=80000198 curr=80000194 prev=80000192
57: > next=8000019c curr=80000198 prev=80000194
58: > next=800001a0 curr=8000019c prev=80000198
59: next=800001a2 curr=800001a0 prev=8000019c
60: next=800001a6 curr=800001a2 prev=800001a0
61: format=1, address=800001a2, branches=15, branch_map=21845, irreport=0, notify=0, updiscon=0,
Reason[exc_only] Payload[bd aa aa 68 00 00 20]
62: next=800001b0 curr=800001a6 prev=800001a2
63: < next=800001e0 curr=800001b0 prev=800001a6
64: < format=3, subformat=TRAP, address=800001b0, branch=1, context=0, ecause=7, interrupt=1,
privilege=3, thaddr=1, Reason[prev_exception]
Payload[77 00 00 00 80 33 6c 00 00 20]
65: < next=800001e4 curr=800001e0 prev=800001b0
66: < next=800001e8 curr=800001e4 prev=800001e0
67: < next=800001ea curr=800001e8 prev=800001e4
The output from the encoder for the fragment of interest is given in line 61. The least significant byte is output first, this means 77 is byte 0, 00 is byte 1 and and the final value 20 is byte 9.
The packet format is given in [fig:packet-format]. So this means the packet will be packed as follows:
-
Header - 1 byte
-
Index - N bits. As an example use 6 bits and the value of 0xA
-
Optional Siemens timestamp - 2 bytes. This example has no timestamp
-
A type field for the packet of 2 bits '01' meaning instruction trace
-
Payload - [0xBD 0xAA 0xAA 0x68 0x00 0x00 0x20]
[0x7][0x29][0xBD 0xAA 0xAA 0x68 0x00 0x00 0x20]
1: ***********************************************************************************
2: ****************** Fragment 0x20010522 - 0x20010528:startup_xrle ******************
3: ***********************************************************************************
4: KEY: ">" means pre-fragment execution, "<" means post-fragment execution
5: ^^^^^^^^^^^^^^^^^^^^^^^^^^ Part 1 of 1 ^^^^^^^^^^^^^^^^^^^^^^^^^^
6:
7: elf:
8: 20010522 <main>:
9: 20010522: 1141 addi sp,sp,-16
10: 20010524: c606 sw ra,12(sp)
11: 20010526: c422 sw s0,8(sp)
12: 20010528: 0800 addi s0,sp,16
13: < 2001052a: 800107b7 lui a5,0x80010
14: < 2001052e: 6721 lui a4,0x8
15: < 20010530: e8670713 addi a4,a4,-378 # 7e86 <__heap_size+0x7686>
16: < 20010534: 1ae7aa23 sw a4,436(a5) # 800101b4 <_sp+0xfffffbfc>
17:
18: trace_spike:
19: ******** Data from xrle.spike_pc_trace line 2 ********
20: ADDRESS=20010522, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
21: ADDRESS=20010524, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
22: ADDRESS=20010526, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
23: ADDRESS=20010528, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
24: < ADDRESS=2001052a, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
25: < ADDRESS=2001052e, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
26: < ADDRESS=20010530, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
27: < ADDRESS=20010534, PRIVILEGE=3, EXCEPTION=0, ECAUSE=0, TVAL=0, INTERRUPT=0
28:
29: encoder_input:
30: ******** Data from xrle.encoder_input line 2 ********
31: ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=20010522, context=0, ctype=0, ilastsize_0=2
32: ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=20010524, context=0, ctype=0, ilastsize_0=2
33: ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=20010526, context=0, ctype=0, ilastsize_0=2
34: ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=20010528, context=0, ctype=0, ilastsize_0=2
35: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=2001052a, context=0, ctype=0, ilastsize_0=4
36: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=2001052e, context=0, ctype=0, ilastsize_0=2
37: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=20010530, context=0, ctype=0, ilastsize_0=4
38: < ITYPE_NONE, cause=0, tval=0, priv=3, iaddr_0=20010534, context=0, ctype=0, ilastsize_0=4
39:
40: te_inst:
41: ******** Data from xrle.te_inst_annotated line 2 ********
42: > format=3, subformat=SUPPORT, enable=1, encoder_mode=0, options=4, qual_status=0 Payload[1f 04]
43: next=20010522
44: next=20010524 curr=20010522
45: format=3, subformat=START, address=20010522, branch=1, context=0,
privilege=3, Reason[ppccd]
Payload[73 00 00 00 00 91 82 00 10]
46: next=20010526 curr=20010524 prev=20010522
47: next=20010528 curr=20010526 prev=20010524
48: < next=2001052a curr=20010528 prev=20010526
49: < next=2001052e curr=2001052a prev=20010528
50: < next=20010530 curr=2001052e prev=2001052a
51: < next=20010534 curr=20010530 prev=2001052e
The output from the encoder for the fragment of interest is given in line 45. The least significant byte is output first, this means 73 is byte 0, 00 is byte 1 and and the final value 10 is byte 8.
The packet format is given in [fig:packet-format]. So this means the packet will be packed as follows:
-
Header - 1 byte
-
Index - N bits. As an example use 6 bits and the value of 0x5
-
Optional timestamp - 2 bytes. This example has no timestamp
-
A type field for the packet of 2 bits '01' meaning instruction trace
-
Payload - [0x73 0x00 0x00 0x00 0x00 0x91 0x82 0x00 0x10]
[0x9][0x15][0x73 0x00 0x00 0x00 0x00 0x91 0x82 0x00 0x10]