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/* SPDX-License-Identifier: copyleft-next-0.3.1 */
/* Copyright 2023, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
/**
* @file irq.c
* IRQ request syscall handling implementation.
*/
#include <kmi/uapi.h>
#include <kmi/irq.h>
/**
* Actual IRQ handling request syscall handler.
*
* @param t Current tcb.
* @param id Which IRQ number to register.
*
* @return \ref OK on success, non-zero otherwise.
*/
SYSCALL_DEFINE1(irq_req)(struct tcb *t, sys_arg_t id)
{
if (!has_cap(t->caps, CAP_IRQ))
return_args1(t, ERR_PERM);
if (!t->callback || !t->notify_id)
return_args1(t, ERR_NF);
return_args1(t, register_irq(t, id));
}
/**
* Actual IRQ freeing syscall handler.
*
* @param t Current tcb.
* @param id ID of IRQ to free.
* @return \ref OK on success, non-zero otherwise.
*/
SYSCALL_DEFINE1(free_irq)(struct tcb *t, sys_arg_t id)
{
if (!has_cap(t->caps, CAP_IRQ))
return_args1(t, ERR_PERM);
return_args1(t, unregister_irq(t, id));
}
/**
* Actual notification handler setter.
*
* @param t Current tcb.
* @param tid Thread whose handler to set. Still not sure if this should just be
* the current thread, but I guess this might be a bit easier?
* @param pid Process that is willing to handle notifications for the thread.
*
* @return OK on success, non-zero otherwise.
*/
SYSCALL_DEFINE2(set_handler)(struct tcb *t, sys_arg_t tid, sys_arg_t pid)
{
if (!has_cap(t->caps, CAP_SIGNAL))
return_args1(t, ERR_PERM);
struct tcb *r = get_tcb(tid);
if (!r)
return_args1(t, ERR_INVAL);
t->notify_id = pid;
return_args1(t, OK);
}
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