On 15 October 2012 11:42, Daniel Golle <dgo...@allnet.de> wrote:
> 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>
> ---
> .../patches-3.3/200-free-mem-below-kernel-offset.patch | 17
> +++++++++++++++++
> 1 file changed, 17 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 0000000..48a3d14
> --- /dev/null
> +++ b/target/linux/ar7/patches-3.3/200-free-mem-below-kernel-offset.patch
> @@ -0,0 +1,17 @@
> +Index: linux-3.3.8/arch/mips/ar7/memory.c
> +===================================================================
> +--- linux-3.3.8.orig/arch/mips/ar7/memory.c
> ++++ linux-3.3.8/arch/mips/ar7/memory.c
You should refresh this patch so it doesn't get modified for the next
one refreshing them.
> +@@ -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
Jonas
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