[PATCH 1/1] avr32: added mem kernel command line option support

[Marco Stornelli <marco.stornelli@coritel.it>]

From: Marco Stornelli <marco.stornelli@gmail.com>

Added support for the mem kernel command line option
Signed-off-by: Marco Stornelli <marco.stornelli@gmail.com>
---
--- setup.c.orig    2008-09-15 11:30:00.000000000 +0200
+++ setup.c    2008-09-15 11:30:17.000000000 +0200
@@ -283,6 +283,25 @@ static int __init early_parse_fbmem(char
 }
 early_param("fbmem", early_parse_fbmem);
 
+/*
+ * Pick out the memory size.  We look for mem=size@start,
+ * where start and size are "size[KkMm]"
+ */
+static int __init early_mem(char **p)
+{
+    unsigned long size, start;
+
+    start = system_ram->start;
+    size  = memparse(*p, p);
+    if (**p == '@')
+        start = memparse(*p + 1, p);
+
+    system_ram->start = start;
+    system_ram->end = system_ram->start + size - 1;
+    return 0;
+}
+early_param("mem", early_mem);
+
 static int __init parse_tag_core(struct tag *tag)
 {
     if (tag->hdr.size > 2) {