Hi, Brennan,
Did you check up_get_newintctx() ?
The function is called from up_initial_state() to create a new task
and needs to return (MSTATUS_MPPM | MSTATUS_MPIE).
Masayuki
________________________________
From: Brennan Ashton <bash...@brennanashton.com>
Sent: Monday, June 22, 2020 3:38
To: dev@nuttx.apache.org <dev@nuttx.apache.org>
Subject: Interrupt restore behavior on task activate
I'm bringing up support for a new RISC-V core but I'm running into some
issues around the sys tick.
My tick timer interrupt is disabled at activating a task, clearly this is
not correct. This is code used across all architectures so I'm sure I just
do not understand something
void nxtask_activate(FAR struct tcb_s *tcb)
{
irqstate_t flags = enter_critical_section();
up_unblock_task(tcb);
leave_critical_section(flags);
}
Won't we perform a context switch here and not leave the critical section?
--Brennan
