33 lines
887 B
Diff
33 lines
887 B
Diff
--- a/arch/mips/bcm47xx/prom.c
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+++ b/arch/mips/bcm47xx/prom.c
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@@ -27,6 +27,7 @@
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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+#include <linux/smp.h>
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#include <asm/bootinfo.h>
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#include <asm/fw/cfe/cfe_api.h>
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#include <asm/fw/cfe/cfe_error.h>
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@@ -127,6 +128,7 @@ static __init void prom_init_mem(void)
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{
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unsigned long mem;
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unsigned long max;
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+ struct cpuinfo_mips *c = ¤t_cpu_data;
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/* Figure out memory size by finding aliases.
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*
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@@ -155,6 +157,14 @@ static __init void prom_init_mem(void)
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break;
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}
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+ /* Ignoring the last page when ddr size is 128M. Cached
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+ * accesses to last page is causing the processor to prefetch
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+ * using address above 128M stepping out of the ddr address
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+ * space.
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+ */
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+ if (c->cputype == CPU_74K && (mem == (128 << 20)))
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+ mem -= 0x1000;
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+
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add_memory_region(0, mem, BOOT_MEM_RAM);
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}
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