[U-Boot] [PATCH] ppc4xx: amcc: Set CONFIG_SYS_BOOTMAPSZ to 16MB to enable booting of big kernels
This patch changes CONFIG_SYS_BOOTMAPSZ from 8MB to 16MB which is the initial TLB on 40x PPC's in the Linux kernel. With this change even bigger Linux kernels (> 8MB) can be booted.
Signed-off-by: Stefan Roese sr@denx.de --- include/configs/amcc-common.h | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/include/configs/amcc-common.h b/include/configs/amcc-common.h index 3b733c0..e82b5ed 100644 --- a/include/configs/amcc-common.h +++ b/include/configs/amcc-common.h @@ -137,10 +137,10 @@
/* * For booting Linux, the board info and command line data - * have to be in the first 8 MB of memory, since this is - * the maximum mapped by the Linux kernel during initialization. + * have to be in the first 16 MB of memory, since this is + * the maximum mapped by the 40x Linux kernel during initialization. */ -#define CONFIG_SYS_BOOTMAPSZ (8 << 20) /* Initial Memory map for Linux */ +#define CONFIG_SYS_BOOTMAPSZ (16 << 20) /* Initial Memory map for Linux */
/* * Internal Definitions
Hi Stefan,
On Wed, 2009-07-29 at 16:25 +0200, Stefan Roese wrote:
This patch changes CONFIG_SYS_BOOTMAPSZ from 8MB to 16MB which is the initial TLB on 40x PPC's in the Linux kernel. With this change even bigger Linux kernels (> 8MB) can be booted.
Might be nice to increase CONFIG_SYS_BOOTM_LEN at the same time. Or maybe something along the lines of changing CONFIG_SYS_BOOTM_LEN to be based on CONFIG_SYS_BOOTMAPSZ in general as (at a glance) it looks like they should generally be the same value.
Best, Peter
Hi Peter,
On Wednesday 29 July 2009 16:36:17 Peter Tyser wrote:
This patch changes CONFIG_SYS_BOOTMAPSZ from 8MB to 16MB which is the initial TLB on 40x PPC's in the Linux kernel. With this change even bigger Linux kernels (> 8MB) can be booted.
Might be nice to increase CONFIG_SYS_BOOTM_LEN at the same time. Or maybe something along the lines of changing CONFIG_SYS_BOOTM_LEN to be based on CONFIG_SYS_BOOTMAPSZ in general as (at a glance) it looks like they should generally be the same value.
I never "tuned" CONFIG_SYS_BOOTM_LEN before. But you are right, this should be changed as well. I'll wait a short while for further comments on this and send an updated patch version then.
Thanks.
Best regards, Stefan
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participants (2)
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Peter Tyser -
Stefan Roese