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authorIra W. Snyder <iws@ovro.caltech.edu>2010-09-10 15:42:32 -0700
committerWolfgang Denk <wd@denx.de>2010-09-23 21:13:32 +0200
commit9f530d59e63f6a4584e0caee54f92255c7ed59ab (patch)
treea49553717f305bc25f287f14accf43cc9afde8f0 /include/configs/MPC837XERDB.h
parente8d3ca8b339a2697d14550790c3a0e3748b2358c (diff)
downloadu-boot-9f530d59e63f6a4584e0caee54f92255c7ed59ab.tar.gz
e300: increase CONFIG_SYS_BOOTMAPSZ to allow booting large kernels
Newer Linux kernels can overrun the initial memory window used for booting with their BSS area. When this happens, they overwrite the FDT and silently fail to boot. On e300 CPUs, the Linux kernel uses an initial BAT covering the first 256MB of RAM. See arch/powerpc/kernel/head_32.S for details. Increase the value of CONFIG_SYS_BOOTMAPSZ to accommodate the maximum value allowed by Linux. This will allow very large kernels to boot. Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu> Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Diffstat (limited to 'include/configs/MPC837XERDB.h')
-rw-r--r--include/configs/MPC837XERDB.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/configs/MPC837XERDB.h b/include/configs/MPC837XERDB.h
index 675021cf51..20c23045fb 100644
--- a/include/configs/MPC837XERDB.h
+++ b/include/configs/MPC837XERDB.h
@@ -544,10 +544,10 @@
/*
* For booting Linux, the board info and command line data
- * have to be in the first 8 MB of memory, since this is
+ * have to be in the first 256 MB of memory, since this is
* the maximum mapped by the Linux kernel during initialization.
*/
-#define CONFIG_SYS_BOOTMAPSZ (8 << 20) /* Initial Memory map for Linux */
+#define CONFIG_SYS_BOOTMAPSZ (256 << 20) /* Initial Memory map for Linux */
/*
* Core HID Setup