Hi Dirk, There is no revision and variant in this cpu_init_cp15 function. I think this function is common unlike kernel code which was cortex specific.
Regards, Nitin Garg -----Original Message----- From: Dirk Behme [mailto:dirk.be...@de.bosch.com] Sent: Wednesday, April 02, 2014 1:46 AM To: Garg Nitin-B37173 Cc: tr...@ti.com; Estevam Fabio-R49496; u-boot@lists.denx.de Subject: Re: [U-Boot] [PATCH 2/2] ARM: Add workaround for Cortex-A9 errata 761320 On 02.04.2014 05:33, nitin.g...@freescale.com wrote: > From: Nitin Garg <nitin.g...@freescale.com> > > Full cache line writes to the same memory region from at least two > processors might deadlock the processor. Exists on r1, r2, r3 > revisions. > > Signed-off-by: Nitin Garg <nitin.g...@freescale.com> > --- > README | 1 + > arch/arm/cpu/armv7/start.S | 5 +++++ > 2 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/README b/README > index a496c65..b7c0f68 100644 > --- a/README > +++ b/README > @@ -567,6 +567,7 @@ The following options need to be configured: > CONFIG_ARM_ERRATA_743622 > CONFIG_ARM_ERRATA_751472 > CONFIG_ARM_ERRATA_794072 > + CONFIG_ARM_ERRATA_761320 > > If set, the workarounds for these ARM errata are applied early > during U-Boot startup. Note that these options force the diff > --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S index > b87a378..1229476 100644 > --- a/arch/arm/cpu/armv7/start.S > +++ b/arch/arm/cpu/armv7/start.S > @@ -227,6 +227,11 @@ ENTRY(cpu_init_cp15) > orr r0, r0, #1 << 4 @ set bit #4 > mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register > #endif > +#ifdef CONFIG_ARM_ERRATA_761320 > + mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register > + orr r0, r0, #1 << 21 @ set bit #21 > + mcr p15, 0, r0, c15, c0, 1 @ write diagnostic register > +#endif Is there any reason why you dropped the check for r4p0 cmp r6, #0x40 @ present prior to r4p0 which you still had in http://www.spinics.net/lists/arm-kernel/msg319223.html ? Best regards Dirk _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
