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/* $NetBSD: gic_splfuncs.c,v 1.5 2021/10/30 18:44:24 jmcneill Exp $ */
/*-
* Copyright (c) 2021 Jared McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: gic_splfuncs.c,v 1.5 2021/10/30 18:44:24 jmcneill Exp $");
#include <sys/param.h>
#include <sys/atomic.h>
#include <sys/kernel.h>
#include <sys/lwp.h>
#include <arm/pic/picvar.h>
#include <arm/cpu.h>
#include <arm/cpufunc.h>
#include <arm/locore.h>
#include <arm/cortex/gic_splfuncs.h>
/* Prototypes for functions in gic_splfuncs_<arch>.S */
int gic_splraise(int);
void gic_splx(int);
/* Local functions */
void Xgic_splx(int);
static int
gic_spllower(int newipl)
{
struct cpu_info * const ci = curcpu();
const int oldipl = ci->ci_cpl;
KASSERT(panicstr || newipl <= ci->ci_cpl);
if (newipl < ci->ci_cpl) {
register_t psw = DISABLE_INTERRUPT_SAVE();
ci->ci_intr_depth++;
pic_do_pending_ints(psw, newipl, NULL);
ci->ci_intr_depth--;
if ((psw & I32_bit) == 0 || newipl == IPL_NONE) {
ENABLE_INTERRUPT();
}
cpu_dosoftints();
}
return oldipl;
}
void
Xgic_splx(int newipl)
{
struct cpu_info *ci = curcpu();
register_t psw;
if (newipl >= ci->ci_cpl) {
return;
}
psw = DISABLE_INTERRUPT_SAVE();
ci->ci_intr_depth++;
pic_do_pending_ints(psw, newipl, NULL);
ci->ci_intr_depth--;
if ((psw & I32_bit) == 0) {
ENABLE_INTERRUPT();
}
cpu_dosoftints();
}
void
gic_spl_init(void)
{
pic_splraise = gic_splraise;
pic_spllower = gic_spllower;
pic_splx = gic_splx;
}
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