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[brcm47xx] fix problem with 128MB ram.

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This patch is out of broadcoms official source code


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18413 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
hauke 2009-11-13 20:32:47 +00:00
parent fa989620af
commit 3fb97947af
4 changed files with 60 additions and 0 deletions
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9
target/linux/brcm-2.4/files/arch/mips/bcm947xx/prom.c
View File

@ -31,6 +31,15 @@ prom_init(int argc, const char **argv)
*(unsigned long *)(prom_init))
break;
}
/* Ignoring the last page when ddr size is 128M. Cached
* accesses to last page is causing the processor to prefetch
* using address above 128M stepping out of the ddr address
* space.
*/
if (mem == 0x8000000)
mem -= 0x1000;
add_memory_region(0, mem, BOOT_MEM_RAM);
}

17
target/linux/brcm47xx/patches-2.6.28/170-128MB_ram_bugfix.patch Normal file
View File

@ -0,0 +1,17 @@
--- a/arch/mips/bcm47xx/prom.c
+++ b/arch/mips/bcm47xx/prom.c
@@ -141,6 +141,14 @@ static __init void prom_init_mem(void)
break;
}
+ /* Ignoring the last page when ddr size is 128M. Cached
+ * accesses to last page is causing the processor to prefetch
+ * using address above 128M stepping out of the ddr address
+ * space.
+ */
+ if (mem == 0x8000000)
+ mem -= 0x1000;
+
add_memory_region(0, mem, BOOT_MEM_RAM);
}

17
target/linux/brcm47xx/patches-2.6.30/170-128MB_ram_bugfix.patch Normal file
View File

@ -0,0 +1,17 @@
--- a/arch/mips/bcm47xx/prom.c
+++ b/arch/mips/bcm47xx/prom.c
@@ -141,6 +141,14 @@ static __init void prom_init_mem(void)
break;
}
+ /* Ignoring the last page when ddr size is 128M. Cached
+ * accesses to last page is causing the processor to prefetch
+ * using address above 128M stepping out of the ddr address
+ * space.
+ */
+ if (mem == 0x8000000)
+ mem -= 0x1000;
+
add_memory_region(0, mem, BOOT_MEM_RAM);
}

17
target/linux/brcm47xx/patches-2.6.31/170-128MB_ram_bugfix.patch Normal file
View File

@ -0,0 +1,17 @@
--- a/arch/mips/bcm47xx/prom.c
+++ b/arch/mips/bcm47xx/prom.c
@@ -141,6 +141,14 @@ static __init void prom_init_mem(void)
break;
}
+ /* Ignoring the last page when ddr size is 128M. Cached
+ * accesses to last page is causing the processor to prefetch
+ * using address above 128M stepping out of the ddr address
+ * space.
+ */
+ if (mem == 0x8000000)
+ mem -= 0x1000;
+
add_memory_region(0, mem, BOOT_MEM_RAM);
}