qemu/hw/openrisc/pic_cpu.c
Thomas Huth 198a2d214f target/openrisc: Fix LGPL information in the file headers
It's either "GNU *Library* General Public License version 2" or "GNU
Lesser General Public License version *2.1*", but there was no "version
2.0" of the "Lesser" license. So assume that version 2.1 is meant here.

Acked-by: Stafford Horne <shorne@gmail.com>
Message-Id: <1550073577-4248-1-git-send-email-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2019-05-08 17:45:54 +02:00

62 lines
1.7 KiB
C

/*
* OpenRISC Programmable Interrupt Controller support.
*
* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
* Feng Gao <gf91597@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/hw.h"
#include "cpu.h"
/* OpenRISC pic handler */
static void openrisc_pic_cpu_handler(void *opaque, int irq, int level)
{
OpenRISCCPU *cpu = (OpenRISCCPU *)opaque;
CPUState *cs = CPU(cpu);
uint32_t irq_bit;
if (irq > 31 || irq < 0) {
return;
}
irq_bit = 1U << irq;
if (level) {
cpu->env.picsr |= irq_bit;
} else {
cpu->env.picsr &= ~irq_bit;
}
if (cpu->env.picsr & cpu->env.picmr) {
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
} else {
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
cpu->env.picsr = 0;
}
}
void cpu_openrisc_pic_init(OpenRISCCPU *cpu)
{
int i;
qemu_irq *qi;
qi = qemu_allocate_irqs(openrisc_pic_cpu_handler, cpu, NR_IRQS);
for (i = 0; i < NR_IRQS; i++) {
cpu->env.irq[i] = qi[i];
}
}