Re: [U-Boot] [PATCH] ppc4xx: Cleanup Boot/FLASH TLB reassignment for PPC440/460

On Thursday 10 June 2010 11:28:06 Stefan Roese wrote:

Background Info: Some PPC440/460 boards have caches enabled in the Boot/FLASH TLB (via init.S) to speed up the boot process. In relocate_code (start.S) the cache inhibit attribute for this TLB is set to disable cache. This is needed for the CFI FLASH driver.

This patch now cleans this code up:

• CONFIG_SYS_TLB_FOR_BOOT_FLASH is defined to 0 (default TLB) if not defined in the top of this file. This way, we can remove an ugly #ifdef in this code.
• Replace complex "#if defined(CONFIG_440EP) || defined(CONFIG_GR)..." statement with "#if defined(CONFIG_440)".
• Remove unnecessary cache invalidate calls resulting in faster bootup.

Applied to u-boot-ppc4xx/master. Thanks.

Cheers, Stefan

-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-0 Fax: (+49)-8142-66989-80 Email: office@denx.de