Hi,
On Fri, Jun 17, 2016 at 8:16 AM, chinna 220 <chinnabha220@gmail.com> wrote:
> Hi - Can someone please help me answering the below?
>
> 1. What type of address CONSOLE_UART_BASE (defined in
> optee_os/core/arch/arm/plat-xxxxx/platform_config.h) represents? Physical
> (or) virtual address?
Physical address, but now that
https://github.com/OP-TEE/optee_os/pull/800 is merged you have to be
careful to not mix physical with virtual. If you look at the latest on
the master branch I think it will be more clear now.
>
> void console_init(void) {
> pl011_init(CONSOLE_UART_BASE, CONSOLE_UART_CLK_IN_HZ,
> CONSOLE_BAUDRATE);
> }
>
> void pl011_init(vaddr_t base, uint32_t uart_clk, uint32_t baud_rate);
>
> 2. Are these consoles across different platforms assumed to be secure or
> non secure?
There's normally no assumptions, but you'll need to map the device
memory correctly though. On most platforms I believe the uarts are
non-secure and even shared with normal world in some cases. We make no
effort to synchronize accesses to a shared uart with normal world, it
seems to work well enough without it. The uart is currently only used
for debug purposes.
Regards,
Jens