Some bootloaders (e.g. PSPBoot on AC49x) have a load-offset, this frees that memory region so it is usable for Linux.
Signed-off-by: Daniel Golle <dgo...@allnet.de>
create mode 100644
target/linux/ar7/patches-3.3/200-free-mem-below-kernel-offset.patch
diff --git
a/target/linux/ar7/patches-3.3/200-free-mem-below-kernel-offset.patch
b/target/linux/ar7/patches-3.3/200-free-mem-below-kernel-offset.patch
new file mode 100644
index 0000000..399822a
--- /dev/null
+++ b/target/linux/ar7/patches-3.3/200-free-mem-below-kernel-offset.patch
@@ -0,0 +1,15 @@
+--- a/arch/mips/ar7/memory.c
++++ b/arch/mips/ar7/memory.c
+@@ -67,5 +67,11 @@ void __init prom_meminit(void)
+
+ void __init prom_free_prom_memory(void)
+ {
+- /* Nothing to free */
++ /* adapted from arch/mips/txx9/generic/setup.c */
++ unsigned long saddr = PHYS_OFFSET + PAGE_SIZE;
++ unsigned long eaddr = __pa_symbol(&_text);
++
++ /* free memory between prom-record and kernel _text base */
++ if (saddr < eaddr)
++ free_init_pages("prom memory", saddr, eaddr);
+ }
--
1.7.12.2
pgp6BAOxoTIjH.pgp
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