PATCH 1/4][v4] doc:Add documentation for e500 external debugger support

[people/ms/u-boot.git] / README

diff --git a/README b/README
index 67dc444bd4d0bbe92d2cefcf45b220d079f98c37..bb1b725672a7dab8ad435aaa8ef5813514f282d5 100644 (file)
--- a/README
+++ b/README
@@ -374,6 +374,15 @@ The following options need to be configured:
                Defines the string to utilize when trying to match PCIe device
                tree nodes for the given platform.
 
+               CONFIG_SYS_PPC_E500_DEBUG_TLB
+
+               Enables a temporary TLB entry to be used during boot to work
+               around limitations in e500v1 and e500v2 external debugger
+               support. This reduces the portions of the boot code where
+               breakpoints and single stepping do not work.  The value of this
+               symbol should be set to the TLB1 entry to be used for this
+               purpose.
+
 - Generic CPU options:
                CONFIG_SYS_BIG_ENDIAN, CONFIG_SYS_LITTLE_ENDIAN