Re: [U-Boot] [PATCH v3 1/3] ARM: Add workaround for Cortex-A9 errata 794072

2014-04-07 Thread Stefano Babic
On 02/04/2014 15:55, nitin.g...@freescale.com wrote: From: Nitin Garg nitin.g...@freescale.com A short loop including a DMB instruction might cause a denial of service on another processor which executes a CP15 broadcast operation. Exists on r1, r2, r3, r4 revisions. Signed-off-by: Nitin

[U-Boot] [PATCH v3 1/3] ARM: Add workaround for Cortex-A9 errata 794072

2014-04-02 Thread nitin.garg
From: Nitin Garg nitin.g...@freescale.com A short loop including a DMB instruction might cause a denial of service on another processor which executes a CP15 broadcast operation. Exists on r1, r2, r3, r4 revisions. Signed-off-by: Nitin Garg nitin.g...@freescale.com Acked-by: Dirk Behme

[U-Boot] [PATCH v3 1/3] ARM: Add workaround for Cortex-A9 errata 794072

2014-04-02 Thread nitin.garg
From: Nitin Garg nitin.g...@freescale.com A short loop including a DMB instruction might cause a denial of service on another processor which executes a CP15 broadcast operation. Exists on r1, r2, r3, r4 revisions. Signed-off-by: Nitin Garg nitin.g...@freescale.com Acked-by: Dirk Behme

Re: [U-Boot] [PATCH v3 1/3] ARM: Add workaround for Cortex-A9 errata 794072

2014-04-02 Thread Stefano Babic
Hi Nitin, On 02/04/2014 15:55, nitin.g...@freescale.com wrote: From: Nitin Garg nitin.g...@freescale.com A short loop including a DMB instruction might cause a denial of service on another processor which executes a CP15 broadcast operation. Exists on r1, r2, r3, r4 revisions.

Re: [U-Boot] [PATCH v3 1/3] ARM: Add workaround for Cortex-A9 errata 794072

2014-04-02 Thread Nitin Garg
Hi Stefano, Errata 742230 applies to r1p0, r1p1, r1p2, r1p3, r2p0, r2p1, r2p2 revision of Cortex-A9. Errata 794072 applies to r1, 2, r3, r4 revisions. Software workaround is same for both. Since diff products use diff revisions of core, I would suggest to have it this way. Otherwise it might