feat(boot): Rename Script 5 to Boot Cycle, add a cold path and stop the log growing

The macro does warm and cold now, so "Reboot" was too narrow:
5_Blanton_Script_Reboot_Cycle.ttl -> 5_Blanton_Script_Boot_Cycle.ttl.

EN_Cold_Warm_boot in config.ttl picks which:

  0  neither - for the A/B/C flow, where this macro is not used
  1  reboot (warm), what the macro always did
  2  cold, by writing the CB FPGA:
     pcimem .../0000:05:00.0/resource0 0x480 w 0xD0000

Three things about that worth knowing before anyone runs it. Setting 0 and
then running this macro hangs it: nothing reboots, and the
wait "Booting in blind mode" underneath has no timeout, so it waits for a
boot that will never come. 0x480 is ICB_CTRL_REG in
docs/Blantons_FPGA_Registers.md and that table has no bit definitions for
it, nor is 0xD0000 written down anywhere in this repo. And the BDF
0000:05:00.0 is hard-coded, while blanton_fpga_pcimem.sh auto-detects the
CB FPGA precisely because it moves per unit - on a DUT where it is not at
05:00.0 this is a raw 32-bit write to an unknown register on some other
device. The cold path has not been run on hardware.

Separately, both stress logs are now removed before each run:

  rm -rf /host/hw-eval/jobs/qfx5252-stress-{ssd,usb}.log

qfx5252-stress-* appends to its --log file and the macro cats the whole
thing afterwards, so every cycle printed back everything the cycles
before it had written. On the 199-cycle log from 2026-09-04 that was 289
lines at cycle 1 and 36,555 at cycle 199; at ~6.2 ms a line, which is
what a 115200 baud console costs, it accounts for +212 s of the +214 s
the cycle grew over the run. The stress itself is fixed at --runtime 30,
and the other eleven gaps between check points drifted by under 1.5 s
each. The DUT was never getting slower - the test was reading its own
history aloud, once per cycle.

Script A's header goes to V1.2.2 and its Version History covers all of
the above.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014RetWKFZFG1ZHcitQAyhwM

src/Script_ABC_Blanton/1_Blanton_Script_A.ttl

@@ -1,7 +1,7 @@
 ; =============================================================================
 ; Script A for Blanton
-; Version : V1.2.1
+; Version : V1.2.2
-; Date    : 2026-09-08
+; Date    : 2026-09-09
 ; Author  : ETWen
 ; =============================================================================
 ; Version History:
@@ -562,6 +562,55 @@
 ;                                                                            concerned: once here and once inside ScriptC. Neither
 ;                                                                            can overlap blanton_traffic_linespeed or
 ;                                                                            blanton_tr518.sh - they all take over the same ports
+;   V1.2.2  2026-09-09
+;                       5_.._Boot_Cycle.ttl                             Renamed from 5_Blanton_Script_Reboot_Cycle.ttl
+;                                                                         It does warm and cold now, so 'Reboot' was too narrow.
+;                                                                         Same macro otherwise - git records it as a rename
+;                       5_.._Boot_Cycle.ttl                             Warm or cold boot, chosen by EN_Cold_Warm_boot
+;                                                                         1 = 'reboot' (warm, what the macro always did). 2 = cold,
+;                                                                         by writing the CB FPGA: pcimem
+;                                                                         /sys/bus/pci/devices/0000:05:00.0/resource0 0x480 w
+;                                                                         0xD0000. 0 = neither
+;                                                                         !! EN_Cold_Warm_boot = 0 hangs the macro. Neither branch
+;                                                                            runs, so nothing reboots, and the 'wait "Booting in
+;                                                                            blind mode"' underneath has no timeout - cycle 1
+;                                                                            finishes and the macro then waits for a boot that will
+;                                                                            never come. 0 is the value for the A/B/C flow, where
+;                                                                            this macro is not used at all; do not run ScriptBoot
+;                                                                            with it
+;                                                                         !! 0x480 is ICB_CTRL_REG in
+;                                                                            docs/Blantons_FPGA_Registers.md, and that table
+;                                                                            carries no bit definitions for it. 0xD0000 is not
+;                                                                            written down anywhere in this repo either. Whoever
+;                                                                            knows what those bits do should put it in the register
+;                                                                            doc before someone changes the value
+;                                                                         !! the BDF 0000:05:00.0 is hard-coded here, while
+;                                                                            blanton_fpga_pcimem.sh auto-detects the CB FPGA
+;                                                                            precisely because it moves per unit (see the V1.0.x
+;                                                                            notes and Key Constraints #4). On a DUT where the FPGA
+;                                                                            is not at 05:00.0 this becomes a raw 32-bit write to
+;                                                                            an unknown register on some other device. Verify the
+;                                                                            BDF on every unit before running the cold path
+;                                                                         !! NOT verified on hardware. The warm path has 199 cycles
+;                                                                            behind it; the cold path has none
+;                       5_.._Boot_Cycle.ttl                             Truncate the two stress logs before each run
+;                                                                         rm -rf /host/hw-eval/jobs/qfx5252-stress-ssd.log and the
+;                                                                         usb one, added ahead of each qfx5252-stress-* call
+;                                                                         qfx5252-stress-* APPENDS to its --log file and the macro
+;                                                                         cats the whole thing afterwards, so every cycle printed
+;                                                                         back everything the ones before it had written
+;                                                                         Measured on the 199 cycle log from 2026-09-04: cycle 1
+;                                                                         printed 289 lines, cycle 199 printed 36,555. At ~6.2 ms a
+;                                                                         line - which is what a 115200 baud console costs - that
+;                                                                         is +212 s of the +214 s the cycle grew over the run. The
+;                                                                         stress itself is fixed at --runtime 30, and the other
+;                                                                         eleven segments between check points drifted by less than
+;                                                                         1.5 s each. The DUT was never getting slower; the test
+;                                                                         was reading its own history aloud once per cycle
+;                       config.ttl                                      Add EN_Cold_Warm_boot
+;                                                                         0 = normal test (A/B/C), 1 = reboot cycle, 2 = power
+;                                                                         cycle. Default 0 so that opening the shared config cannot
+;                                                                         reboot anyone's DUT by accident
 ; =============================================================================
 include "config.ttl"
 

src/Script_ABC_Blanton/5_Blanton_Script_Boot_Cycle.ttl

@@ -172,6 +172,8 @@ while 1
     sprintf2 strCKPt5 "echo -e '\033[36mCheck Pt5 : SSD Test\033[0m'"
     sendln strCKPt5
 
+    wait prompt_sonic_root
+    sendln "rm -rf /host/hw-eval/jobs/qfx5252-stress-ssd.log"
     wait prompt_sonic_root
     sendln "qfx5252-stress-ssd 1G --runtime 30 --passes 2 --write --force --log /host/hw-eval/jobs/qfx5252-stress-ssd.log"
     wait prompt_sonic_root
@@ -189,6 +191,8 @@ while 1
     waitregex '<<DEV=([^>]*)>>'
     usb_dev = groupmatchstr1
 
+    wait prompt_sonic_root
+    sendln "rm -rf /host/hw-eval/jobs/qfx5252-stress-usb.log"
     wait prompt_sonic_root
     sprintf2 cmd "qfx5252-stress-usb %s 256M --runtime 30 --passes 2 --write --log /host/hw-eval/jobs/qfx5252-stress-usb.log" usb_dev
     sendln cmd
@@ -412,8 +416,15 @@ while 1
     sendln "show uptime"
 
     ; ========== Show Power on uptime ==========
-    wait prompt_sonic_root
+    if EN_Cold_Warm_boot = 1 then
-    sendln "reboot"
+        wait prompt_sonic_root
+        sendln "reboot"
+    elseif EN_Cold_Warm_boot = 2 then
+        wait prompt_sonic_root
+        sendln "pcimem /sys/bus/pci/devices/0000:05:00.0/resource0 0x480 w 0xD0000"
+    else
+    endif
+
 
     wait "Booting in blind mode"
 endwhile

src/Script_ABC_Blanton/config.ttl

@@ -34,4 +34,13 @@ BMC_USB_RUNTIME = 172800    ; Unit seconds, 172800 = 2 days
 ;================================================================
 prompt_login = "sonic login:"
 prompt_sonic = "admin@sonic:~$"
-prompt_sonic_root = "root@sonic:~#"
+prompt_sonic_root = "root@sonic:~#"
+
+
+;================================================================
+; Reboot or Power Cycle
+;================================================================
+; 0: Normal Test
+; 1: Enable Reboot Cycle
+; 2: Enable Power Cycle
+EN_Cold_Warm_boot = 0