[Skiboot] [PATCH] external/mambo: Add an option to exit Mambo when the system is shutdown

[Nicholas Piggin]

From: Alistair Popple <alistair at popple.id.au>

Automatically exiting can be convenient for scripting. Will also exit
due to a HW crash (eg. unhandled exception).

Signed-off-by: Alistair Popple <alistair at popple.id.au>
Signed-off-by: Nicholas Piggin <npiggin at gmail.com>
---
 external/mambo/README.md   | 5 +++++
 external/mambo/skiboot.tcl | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/external/mambo/README.md b/external/mambo/README.md
index a0bc4a0fd..0390cc0ab 100644
--- a/external/mambo/README.md
+++ b/external/mambo/README.md
@@ -40,6 +40,11 @@ export SKIBOOT_ZIMAGE=$HOME/src/op-build/output/images/zImage.epapr
 export SKIBOOT=$HOME/src/op-build/output/images/skiboot.lid
 export SKIBOOT_AUTORUN=1
 ```
+If you want Mambo to autmatically run *AND* exit when the system is
+shutdown (or has a HW crash) use this:
+```
+export SKIBOOT_AUTORUN=2
+```
 If you want a vmlinux and separate initramfs you can also do this:
 ```
 export SKIBOOT_ZIMAGE=$HOME/src/op-build/output/images/vmlinux
diff --git a/external/mambo/skiboot.tcl b/external/mambo/skiboot.tcl
index 1b05ba843..658155ae8 100644
--- a/external/mambo/skiboot.tcl
+++ b/external/mambo/skiboot.tcl
@@ -590,3 +590,7 @@ if { [info exists env(SKIBOOT_AUTORUN)] } {
 } else {
 	readline
 }
+
+if { $env(SKIBOOT_AUTORUN) == 2 } {
+    quit
+}
-- 
2.20.1