Re: [U-Boot] armv7: fix: Disable D cache for goni target (s5p)
Hi Lukasz, Le 15/07/2011 09:34, Lukasz Majewski a écrit : On Thu, 14 Jul 2011 16:00:23 +0200 Albert ARIBAUDalbert.u.b...@aribaud.net wrote: Hi Lukasz, Le 11/07/2011 09:41, Lukasz Majewski a écrit : Signed-off-by: Lukasz Majewskil.majew...@samsung.com Cc: Minkyu Kangmk7.k...@samsung.com Cc: Aneesh Vane...@ti.com --- Can you please submit a V2 patch in which the commit message provides a rationale for turning the data cache off? People who want to turn it on later will benefit from the info. Amicalement, Hi Albert, Rationale for turning OFF D cache: 1. Before change introduced in commit SHA1:c2dd0d45540397704de9b13287417d21049d34c6 the D-cache for GONI/Universal_c210 targets was disabled. This change was supposed to preserve this state. 2. I've done some investigation about enabling D-cache support. It turned out, that some drivers (which are already posted or are in the queue for posting to u-boot list) have had problems with D-cache coherency. This commit shall be treated as a temporal solution. After solving cache management (and coherency) problems the D-cache would be definitely enabled. Thanks. Except for a typo (Temporal- Temporary), please put this rationale in the commit message for V2. Amicalement, -- Albert. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] armv7: fix: Disable D cache for goni target (s5p)
On Thu, 14 Jul 2011 16:00:23 +0200 Albert ARIBAUD albert.u.b...@aribaud.net wrote: Hi Lukasz, Le 11/07/2011 09:41, Lukasz Majewski a écrit : Signed-off-by: Lukasz Majewskil.majew...@samsung.com Cc: Minkyu Kangmk7.k...@samsung.com Cc: Aneesh Vane...@ti.com --- Can you please submit a V2 patch in which the commit message provides a rationale for turning the data cache off? People who want to turn it on later will benefit from the info. Amicalement, Hi Albert, Rationale for turning OFF D cache: 1. Before change introduced in commit SHA1:c2dd0d45540397704de9b13287417d21049d34c6 the D-cache for GONI/Universal_c210 targets was disabled. This change was supposed to preserve this state. 2. I've done some investigation about enabling D-cache support. It turned out, that some drivers (which are already posted or are in the queue for posting to u-boot list) have had problems with D-cache coherency. This commit shall be treated as a temporal solution. After solving cache management (and coherency) problems the D-cache would be definitely enabled. -- Best regards, Lukasz Majewski Samsung Poland RD Center Platform Group ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] armv7: fix: Disable D cache for goni target (s5p)
Hi Lukasz, Le 11/07/2011 09:41, Lukasz Majewski a écrit : Signed-off-by: Lukasz Majewskil.majew...@samsung.com Cc: Minkyu Kangmk7.k...@samsung.com Cc: Aneesh Vane...@ti.com --- Can you please submit a V2 patch in which the commit message provides a rationale for turning the data cache off? People who want to turn it on later will benefit from the info. Amicalement, -- Albert. ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] armv7: fix: Disable D cache for goni target (s5p)
Signed-off-by: Lukasz Majewski l.majew...@samsung.com Cc: Minkyu Kang mk7.k...@samsung.com Cc: Aneesh V ane...@ti.com --- include/configs/s5p_goni.h |3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/include/configs/s5p_goni.h b/include/configs/s5p_goni.h index d648ce8..010428b 100644 --- a/include/configs/s5p_goni.h +++ b/include/configs/s5p_goni.h @@ -74,6 +74,9 @@ /* It should define before config_cmd_default.h */ #define CONFIG_SYS_NO_FLASH1 +/* Cache D configuration */ +#define CONFIG_SYS_DCACHE_OFF + /* Command definition */ #include config_cmd_default.h -- 1.7.2.3 ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
