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10 commits

Author SHA1 Message Date
Tetsuyuki Kobayashi
6f0dba85a9 arm: bugfix: save_boot_params_default accesses uninitalized stack when -O0
save_boot_params_default() in cpu.c accesses uninitialized stack area
when it compiled with -O0 (not optimized).
This patch removes save_boot_params_default() and put the equivalent in start.S

Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Acked-by: Tom Rini <trini@ti.com>
2012-09-01 14:58:22 +02:00
Mathieu J. Poirier
53e6f6a634 armv7: Adding cpu specific cache managmenent
Some CPU (i.e u8500) need more cache management before launching
the Linux kernel.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: John Rigby <john.rigby@linaro.org>
2012-09-01 14:58:20 +02:00
Wolfgang Denk
18277f7057 Revert "arm: bugfix: save_boot_params_default accesses uninitalized stack when -O0"
This reverts commit fa042186b9.
It causes build warnings like this:
cpu.c:48:1: warning: -fstack-usage not supported for this target
[enabled by default]

Signed-off-by: Wolfgang Denk <wd@denx.de>
2012-07-09 09:19:00 +02:00
Tetsuyuki Kobayashi
fa042186b9 arm: bugfix: save_boot_params_default accesses uninitalized stack when -O0
save_boot_params_default() in cpu.c accesses uninitialized stack area
when it compiled with -O0 (not optimized).

Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Acked-by: Tom Rini <trini@ti.com>
2012-07-07 14:07:36 +02:00
Stefano Babic
d460587a44 Add cache functions to SPL for armv7
Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Tom Rini <tom.rini@gmail.com>
CC: Wolfgang Denk <wd@denx.de>
CC: Simon Schwarz <simonschwarzcor@gmail.com>
2012-03-27 22:05:29 +02:00
Aneesh V
dc7100f408 armv7: disable L2 cache in cleanup_before_linux()
We were not disabling external caches before jumping
to kernel. We were flushing all caches including
external caches and disabling caches globally in
CP15 System Control register. Apparently this is not
enough.

The bootstrap loader in Linux kernel that does decompression
enables data-caches again, flush them after use and disable
them before jumping to kernel proper. However, it's not aware
of the external caches.

Since we have left external cache enabled, external cache will
get used once caches are enabled globally, but it's not flushed
because decompressor is not aware of external caches. When it
jumps to kernel with caches disabled globally, we have stale
data in the external cache and a coherency problem.

This was breaking the boot for OMAP4 with latest mainline
kernel. The solution is to disable external caches in
cleanup_before_linux(). With this fix kernel is booting again.

Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Signed-off-by: Aneesh V <aneesh@ti.com>
2011-12-06 23:59:33 +01:00
Aneesh V
8cf686e19b omap: add MMC and FAT support to SPL
- Add MMC raw and FAT mode boot support for OMAP
- Provide a means by which parameters passed by ROM-code
  can be saved in u-boot.
- Save boot mode related information passed by OMAP4 ROM-code
  and use it to determine where to load the u-boot from
- Assumes that the image has a mkimage header. Gets the
  payload size and load address from this header. If the
  header is not detected assume u-boot.bin as payload

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-08-03 12:49:20 +02:00
Aneesh V
c2dd0d4554 armv7: integrate cache maintenance support
- Enable I-cache on bootup
- Enable MMU and D-cache immediately after relocation
	- Do necessary initialization before enabling d-cache and MMU
- Changes to cleanup_before_linux()
	- Make changes according to the new framework

Signed-off-by: Aneesh V <aneesh@ti.com>
2011-07-04 10:55:25 +02:00
Aneesh V
e47f2db537 armv7: rename cache related CONFIG flags
Replace the cache related CONFIG flags with more meaningful
names. Following are the changes:

CONFIG_L2_OFF	     -> CONFIG_SYS_L2CACHE_OFF
CONFIG_SYS_NO_ICACHE -> CONFIG_SYS_ICACHE_OFF
CONFIG_SYS_NO_DCACHE -> CONFIG_SYS_DCACHE_OFF

Signed-off-by: Aneesh V <aneesh@ti.com>
V2:
 * Changed CONFIG_L2_OFF -> CONFIG_SYS_NO_L2CACHE
V4:
 * Changed all three flags to the final names suggested as above
   and accordingly changed the commit message
2011-07-04 10:55:25 +02:00
Steve Sakoman
f56348af5d ARM: Rename arch/arm/cpu/arm_cortexa8 to armv7
The purpose of this patch is to prepare for adding the OMAP4 architecture, which is Cortex A9

Cortex A8 and A9 both belong to the armv7 architecture, hence the name change.

The two architectures are similar enough that substantial code can be shared.

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2010-07-05 19:59:55 -04:00
Renamed from arch/arm/cpu/arm_cortexa8/cpu.c (Browse further)