[U-Boot] [PATCH V3 0/11] ARM: OMAP3-DRA7: CP15 erratum workarounds and improvements

Nishanth Menon
2015-03-03T16:25:51Z

On 03/03/2015 12:45 AM, Siarhei Siamashka wrote:
[...]
> In one way, this can be verified by just checking that the necessary
> bits in the system registers are properly set according to the
> recommendations from the errata lists. AFAIK, only writes to these
> registers are restricted, so that it has to be done in an OMAP specific
> way using the SMC calls. But reading them somewhere early in the
> Linux kernel and doing printk should be fine.

http://paste.ubuntu.org.cn/2522971 a quick patch on v4.0-rc1 to do the
same. Sorry, test farm I have access to, is a bit wonky at the moment.
(use omap2plus_defconfig)

few of the boards I could cajole logs out are as follows (uses legacy
bootloaders, not completely controlled source etc.. and are in a
remote location that I cannot update easily):

> am335x-evm.txt:[ 0.000000] XXXX o3_dump_arm_regs:CPUID=0x413fc082 ACR=0x00000042 L2AUXCR=0x00000042
> am335x-sk.txt:[ 0.000000] XXXX o3_dump_arm_regs:CPUID=0x413fc082 ACR=0x00000042 L2AUXCR=0x00000042
> am3517-evm.txt:[ 0.000000] XXXX o3_dump_arm_regs:CPUID=0x411fc087 ACR=0x000000e2 L2AUXCR=0x00000042
> am37x-evm.txt:[ 0.000000] XXXX o3_dump_arm_regs:CPUID=0x413fc082 ACR=0x000000e2 L2AUXCR=0x00000042
> am57xx-evm.txt:[ 0.000000] XXXX o5_dump_arm_regs:CPUID=0x412fc0f2 L2CTLR=0x01800083 L2ACLR=0x00000000 L2PFR=0x000009b0 ACTLR=0x00000040
> beagleboard.txt:[ 0.000000] XXXX o3_dump_arm_regs:CPUID=0x413fc082 ACR=0x000000e2 L2AUXCR=0x00000042
> beaglebone-black.txt:[ 0.000000] XXXX o3_dump_arm_regs:CPUID=0x413fc082 ACR=0x00000042 L2AUXCR=0x00000042
> beaglebone.txt:[ 0.000000] XXXX o3_dump_arm_regs:CPUID=0x413fc082 ACR=0x00000042 L2AUXCR=0x00000042
> dra72x-evm.txt:[ 0.000000] XXXX o5_dump_arm_regs:CPUID=0x412fc0f2 L2CTLR=0x00800083 L2ACLR=0x00000000 L2PFR=0x000009b0 ACTLR=0x00000040
> dra7xx-evm.txt:[ 0.000000] XXXX o5_dump_arm_regs:CPUID=0x412fc0f2 L2CTLR=0x01800083 L2ACLR=0x00000000 L2PFR=0x000009b0 ACTLR=0x00000040
> omap5-evm.txt:[ 0.000000] XXXX o5_dump_arm_regs:CPUID=0x412fc0f2 L2CTLR=0x01800083 L2ACLR=0x00000000 L2PFR=0x000009b0 ACTLR=0x00000040

--
Regards,
Nishanth Menon