brcm47xx: move patches already in the mainline kernel to the front
[openwrt/svn-archive/archive.git] / target / linux / brcm47xx / patches-3.6 / 010-MIPS-BCM47XX-ignore-last-memory-page.patch
1 --- a/arch/mips/bcm47xx/prom.c
2 +++ b/arch/mips/bcm47xx/prom.c
3 @@ -27,6 +27,7 @@
4 #include <linux/types.h>
5 #include <linux/kernel.h>
6 #include <linux/spinlock.h>
7 +#include <linux/smp.h>
8 #include <asm/bootinfo.h>
9 #include <asm/fw/cfe/cfe_api.h>
10 #include <asm/fw/cfe/cfe_error.h>
11 @@ -127,6 +128,7 @@ static __init void prom_init_mem(void)
12 {
13 unsigned long mem;
14 unsigned long max;
15 + struct cpuinfo_mips *c = &current_cpu_data;
16
17 /* Figure out memory size by finding aliases.
18 *
19 @@ -155,6 +157,14 @@ static __init void prom_init_mem(void)
20 break;
21 }
22
23 + /* Ignoring the last page when ddr size is 128M. Cached
24 + * accesses to last page is causing the processor to prefetch
25 + * using address above 128M stepping out of the ddr address
26 + * space.
27 + */
28 + if (c->cputype == CPU_74K && (mem == (128 << 20)))
29 + mem -= 0x1000;
30 +
31 add_memory_region(0, mem, BOOT_MEM_RAM);
32 }
33