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| author | florian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-11-25 20:53:00 +0000 |
|---|---|---|
| committer | florian <florian@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2012-11-25 20:53:00 +0000 |
| commit | 8f9a91d598f456d137c1a99a854aaab2f386c8df (patch) | |
| tree | 4c33d8a236763d1255f9da1c5daee22040d7d4c4 /target/linux/ar7 | |
| parent | eb39786ae698273548d5d4212709ed151ceca66e (diff) | |
| download | openwrt-8f9a91d598f456d137c1a99a854aaab2f386c8df.tar.gz openwrt-8f9a91d598f456d137c1a99a854aaab2f386c8df.zip | |
AA: [ar7] 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 <dgolle@allnet.de>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/branches/attitude_adjustment@34383 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar7')
| -rw-r--r-- | target/linux/ar7/patches-3.3/200-free-mem-below-kernel-offset.patch | 15 |
1 files changed, 15 insertions, 0 deletions
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 000000000..399822a1c --- /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); + } |