[Xenomai] Only 2 serial ports at a time with xeno_16550A driver

I'm not familiar with the chaining of shared interrupts in the RTDM architecture. I think the EOI should somehow be done in the very last invocation of rt_16550_interrupt() by the last peripheral needing service. I read this from an old interrupt handler: (assuming IBM PC (Intel) architecture)

Re: [Xenomai] Only 2 serial ports at a time with xeno_16550A driver

On 2018-05-20 09:43, C Smith wrote: > An update: > In the modprobe, I tried putting first the two ports which share IRQ 5: > modprobe xeno_16550A io=0x02f8,0x2e8,0x3f8 irq=5,5,4 BTW, the x86 platform UARTs use IRQ4 (port 1 and 3) and IRQ3 (port 2 and 4). Jan -- Siemens AG, Corporate

Re: [Xenomai] Only 2 serial ports at a time with xeno_16550A driver

This is highly likely, I'm not sure when this driver was last tested. Are you able to put a patch together? Has anyone else sense similar behaviour? -Greg On Tue, May 22, 2018 at 2:31 PM, C Smith wrote: > I think I may have found a bug in the rtl_16550A driver when

[Xenomai] Only 2 serial ports at a time with xeno_16550A driver

I think I may have found a bug in the rtl_16550A driver when using shared interrupts. (I am on Xenomai 2.6.5. Kernel 3.18.20.) I think the interrupt handler is not sending an EOI to the lower (ISA 8259) interrupt controller, though it certainly is doing the right thing for higher IRQs above 16.

Re: [Xenomai] Xenomai 3 Multi-core Semaphore latency

On 05/22/2018 07:06 AM, Dmitriy Cherkasov wrote: > On 05/20/2018 08:07 AM, Philippe Gerum wrote: >> On 05/18/2018 06:24 PM, Singh, Raman wrote: >>> Environment: ARM Cortex-A53 quad-core processor (ARM 64-bit) on a >>> Zynq Ultrascale+ ZCU102 dev board, Xenomai 3 next branch from May >>> 14, 2018

Re: [Xenomai] Boot failed on arm64 - xenomai_init --> ipipe_send_ipi

On 05/18/2018 12:00 AM, Jan Kiszka wrote: > On 2018-05-17 04:13, Dmitriy Cherkasov wrote: >> On Wed, May 16, 2018, at 11:13 AM, Auel, Kendall wrote: >>> I'm trying to build a xenomai-enabled kernel for an arm64 (quad A53 >>> cores). Something is not configured correctly, but I haven't been able

[Xenomai] Only 2 serial ports at a time with xeno_16550A driver

Update: I installed a Moxa 4 port PCI serial card, which has a shared interrupt for all 4 ports. I did this: modprobe xeno_16550A io=0xd040,0xd048,0xd050,0xd058 irq=17,17,17,17 baud_base=921600,921600,921600,921600 This worked fine, I was able to communicate bidirectionally on all four ports in