Different performance in HYP and SVC mode ARMv7A?

I'm doing some testing on Exynos5422 SoC which implements big.LITTLE architecture (A7 + A15), I'm running bare metal application which starts in HYP mode. I haven't returned from HYP mode by accident...
ARM Cortex-A7 generic timer

Hi ARM expert, I am trying to use generic timer, but seems the generic timer wasn't enabled. My steps are: Set CNTFRQ with 1MHz Set CNTP_CVAL with 100 set CNTP_CTL with 0x00000001 4. Read CNTP_CTL...
Question -

Hi, I have strange symptom with Cortex-A15 device. The below is traced data. Program AddressDisassembly 0x40401AA0CMP R12, R0 0x40401AA4BHI 0x40401A80 0x40401A80LDR ...
Non-Cacheable memory and DMA on armv7a

Hi ! Consider a micro-kernel (not Linux) where device drivers are userland applications (PL0). We would like to use DMA based device, like an Ethernet controller for example. To this mean, the micro...
Ten Things to Know About big.LITTLE

Chinese Version中文版 ARM big.LITTLE technology is becoming increasingly recognized within the industry as the way forward to meet the demands of higher performance with low power consumption in mobile...