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authorGabe Black <gabeblack@chromium.org>2012-12-02 04:55:18 +0000
committerSimon Glass <sjg@chromium.org>2012-12-06 14:30:40 -0800
commit40fef0490610686022f99b8e070df7ac761c11a0 (patch)
treed3338158170744d00fb569ffac2edecbf72dbd2c /README
parentec516c489969c1c12e9b26900facee6efd60c938 (diff)
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Introduce arch_phys_memset which works like memset but on physical memory
The default implementation of this function is just memset, but other implementations will be needed when physical memory isn't accessible by U-Boot using normal addressing mechanisms. Signed-off-by: Gabe Black <gabeblack@chromium.org> Signed-off-by: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
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@@ -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