arch/x86: Reserve space for stack in CAR layout

Some platforms may want to use C code in bootblock so they need
writable memory and CAR can be used for it. This change reserves
memory in CAR that can be used by bootblock and other CAR stages.

Change-Id: I8dec768cf8763dbe235f0ba1339079ebc49cbd9a
Signed-off-by: Andrey Petrov <>
Reviewed-by: Aaron Durbin <>
Tested-by: build bot (Jenkins)
1 file changed