diff options
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.3/192-MIPS-BCM47XX-improve-memory-size-detection.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.3/192-MIPS-BCM47XX-improve-memory-size-detection.patch b/target/linux/brcm47xx/patches-3.3/192-MIPS-BCM47XX-improve-memory-size-detection.patch new file mode 100644 index 0000000000..548178c29e --- /dev/null +++ b/target/linux/brcm47xx/patches-3.3/192-MIPS-BCM47XX-improve-memory-size-detection.patch @@ -0,0 +1,42 @@ +--- a/arch/mips/bcm47xx/prom.c ++++ b/arch/mips/bcm47xx/prom.c +@@ -1,6 +1,7 @@ + /* + * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> + * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net> ++ * Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the +@@ -60,6 +61,7 @@ static __init void prom_init_mem(void) + { + unsigned long mem; + unsigned long max; ++ unsigned long off, data, off1, data1; + struct cpuinfo_mips *c = ¤t_cpu_data; + + /* Figure out memory size by finding aliases. +@@ -77,15 +79,19 @@ static __init void prom_init_mem(void) + * max contains the biggest possible address supported by the platform. + * If the method wants to try something above we assume 128MB ram. + */ +- max = ((unsigned long)(prom_init) | ((128 << 20) - 1)); ++ off = (unsigned long)prom_init; ++ data = *(unsigned long *)prom_init; ++ off1 = off + 4; ++ data1 = *(unsigned long *)off1; ++ max = off | ((128 << 20) - 1); + for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) { +- if (((unsigned long)(prom_init) + mem) > max) { ++ if ((off + mem) > max) { + mem = (128 << 20); + printk(KERN_DEBUG "assume 128MB RAM\n"); + break; + } +- if (*(unsigned long *)((unsigned long)(prom_init) + mem) == +- *(unsigned long *)(prom_init)) ++ if ((*(unsigned long *)(off + mem) == data) && ++ (*(unsigned long *)(off1 + mem) == data1)) + break; + } + |