42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
--- a/arch/mips/bcm47xx/prom.c
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+++ b/arch/mips/bcm47xx/prom.c
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@@ -1,6 +1,7 @@
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/*
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* Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
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* Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
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+ * Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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@@ -60,6 +61,7 @@ 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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+ unsigned long off, data, off1, data1;
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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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@@ -77,15 +79,19 @@ static __init void prom_init_mem(void)
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* max contains the biggest possible address supported by the platform.
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* If the method wants to try something above we assume 128MB ram.
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*/
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- max = ((unsigned long)(prom_init) | ((128 << 20) - 1));
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+ off = (unsigned long)prom_init;
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+ data = *(unsigned long *)prom_init;
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+ off1 = off + 4;
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+ data1 = *(unsigned long *)off1;
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+ max = off | ((128 << 20) - 1);
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for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) {
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- if (((unsigned long)(prom_init) + mem) > max) {
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+ if ((off + mem) > max) {
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mem = (128 << 20);
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printk(KERN_DEBUG "assume 128MB RAM\n");
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break;
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}
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- if (*(unsigned long *)((unsigned long)(prom_init) + mem) ==
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- *(unsigned long *)(prom_init))
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+ if ((*(unsigned long *)(off + mem) == data) &&
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+ (*(unsigned long *)(off1 + mem) == data1))
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break;
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}
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