blob: ecb7b78e7eb383d891985f40a8252aabc3f24613 [file] [log] [blame]
/* int-sethandler.c - register an interrupt handler in XTOS */
/*
* Copyright (c) 1999-2017 Cadence Design Systems, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "xtos-structs.h"
#include <arch/cpu.h>
extern struct xtos_core_data *core_data_ptr[PLATFORM_CORE_COUNT];
_xtos_handler _xtos_set_interrupt_handler_arg( int n, _xtos_handler f, void *arg )
{
XtosIntHandlerEntry *entry;
_xtos_handler old;
_xtos_handler ret;
if( (n < 0) || (n >= XCHAL_NUM_INTERRUPTS) ) {
ret = 0; /* invalid interrupt number */
}
else if( (int) Xthal_intlevel[n] > XTOS_LOCKLEVEL ) {
ret = 0; /* priority level too high to safely handle in C */
}
else {
entry = &(core_data_ptr[arch_cpu_get_id()]->xtos_int_data.xtos_interrupt_table.array[MAPINT(n)]);
old = entry->handler;
if (f) {
entry->handler = f;
entry->u.varg = arg;
} else {
entry->handler = &xtos_unhandled_interrupt;
entry->u.narg = n;
}
ret = (old == &xtos_unhandled_interrupt) ? 0 : old;
}
return ret;
}
_xtos_handler _xtos_set_interrupt_handler( int n, _xtos_handler f )
{
return _xtos_set_interrupt_handler_arg( n, f, (void *) n );
}