From d9b89db3801e9750592c6fc617847528ff3ad34b Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Sun, 11 Nov 2012 16:11:00 +0000 Subject: [PATCH] free memory below kernel offset 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 Signed-off-by: Florian Fainelli SVN-Revision: 34143 --- .../200-free-mem-below-kernel-offset.patch | 15 +++++++++++++++ 1 file changed, 15 insertions(+) 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 000000000000..399822a1ca3f --- /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); + } -- 2.30.2