| 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 | @@ -59,6 +60,7 @@ static __init void prom_init_mem(void) |
| 12 | { |
| 13 | unsigned long mem; |
| 14 | unsigned long max; |
| 15 | + struct cpuinfo_mips *c = ¤t_cpu_data; |
| 16 | |
| 17 | /* Figure out memory size by finding aliases. |
| 18 | * |
| 19 | @@ -87,6 +89,14 @@ 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 | |
| 34 | |
