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-rw-r--r--README8
1 files changed, 8 insertions, 0 deletions
diff --git a/README b/README
index ed7d270..c7aab18 100644
--- a/README
+++ b/README
@@ -2200,6 +2200,14 @@ CBFS (Coreboot Filesystem) support
HERMES, IP860, RPXlite, LWMON,
FLAGADM, TQM8260
+- Access to physical memory region (> 4GB)
+ Some basic support is provided for operations on memory not
+ normally accessible to U-Boot - e.g. some architectures
+ support access to more than 4GB of memory on 32-bit
+ machines using physical address extension or similar.
+ Define CONFIG_PHYSMEM to access this basic support, which
+ currently only supports clearing the memory.
+
- Error Recovery:
CONFIG_PANIC_HANG