650d103d3e
In my "build everything" tree, changing hw/hw.h triggers a recompile of some 2600 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). The previous commits have left only the declaration of hw_error() in hw/hw.h. This permits dropping most of its inclusions. Touching it now recompiles less than 200 objects. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-19-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/*
|
|
* QEMU OpenRISC timer support
|
|
*
|
|
* Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
|
|
* Zhizhou Zhang <etouzh@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 "cpu.h"
|
|
#include "migration/vmstate.h"
|
|
#include "qemu/timer.h"
|
|
|
|
#define TIMER_PERIOD 50 /* 50 ns period for 20 MHz timer */
|
|
|
|
/* Tick Timer global state to allow all cores to be in sync */
|
|
typedef struct OR1KTimerState {
|
|
uint32_t ttcr;
|
|
uint64_t last_clk;
|
|
} OR1KTimerState;
|
|
|
|
static OR1KTimerState *or1k_timer;
|
|
|
|
void cpu_openrisc_count_set(OpenRISCCPU *cpu, uint32_t val)
|
|
{
|
|
or1k_timer->ttcr = val;
|
|
}
|
|
|
|
uint32_t cpu_openrisc_count_get(OpenRISCCPU *cpu)
|
|
{
|
|
return or1k_timer->ttcr;
|
|
}
|
|
|
|
/* Add elapsed ticks to ttcr */
|
|
void cpu_openrisc_count_update(OpenRISCCPU *cpu)
|
|
{
|
|
uint64_t now;
|
|
|
|
if (!cpu->env.is_counting) {
|
|
return;
|
|
}
|
|
now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
or1k_timer->ttcr += (uint32_t)((now - or1k_timer->last_clk)
|
|
/ TIMER_PERIOD);
|
|
or1k_timer->last_clk = now;
|
|
}
|
|
|
|
/* Update the next timeout time as difference between ttmr and ttcr */
|
|
void cpu_openrisc_timer_update(OpenRISCCPU *cpu)
|
|
{
|
|
uint32_t wait;
|
|
uint64_t now, next;
|
|
|
|
if (!cpu->env.is_counting) {
|
|
return;
|
|
}
|
|
|
|
cpu_openrisc_count_update(cpu);
|
|
now = or1k_timer->last_clk;
|
|
|
|
if ((cpu->env.ttmr & TTMR_TP) <= (or1k_timer->ttcr & TTMR_TP)) {
|
|
wait = TTMR_TP - (or1k_timer->ttcr & TTMR_TP) + 1;
|
|
wait += cpu->env.ttmr & TTMR_TP;
|
|
} else {
|
|
wait = (cpu->env.ttmr & TTMR_TP) - (or1k_timer->ttcr & TTMR_TP);
|
|
}
|
|
next = now + (uint64_t)wait * TIMER_PERIOD;
|
|
timer_mod(cpu->env.timer, next);
|
|
}
|
|
|
|
void cpu_openrisc_count_start(OpenRISCCPU *cpu)
|
|
{
|
|
cpu->env.is_counting = 1;
|
|
cpu_openrisc_count_update(cpu);
|
|
}
|
|
|
|
void cpu_openrisc_count_stop(OpenRISCCPU *cpu)
|
|
{
|
|
timer_del(cpu->env.timer);
|
|
cpu_openrisc_count_update(cpu);
|
|
cpu->env.is_counting = 0;
|
|
}
|
|
|
|
static void openrisc_timer_cb(void *opaque)
|
|
{
|
|
OpenRISCCPU *cpu = opaque;
|
|
|
|
if ((cpu->env.ttmr & TTMR_IE) &&
|
|
timer_expired(cpu->env.timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL))) {
|
|
CPUState *cs = CPU(cpu);
|
|
|
|
cpu->env.ttmr |= TTMR_IP;
|
|
cs->interrupt_request |= CPU_INTERRUPT_TIMER;
|
|
}
|
|
|
|
switch (cpu->env.ttmr & TTMR_M) {
|
|
case TIMER_NONE:
|
|
break;
|
|
case TIMER_INTR:
|
|
or1k_timer->ttcr = 0;
|
|
break;
|
|
case TIMER_SHOT:
|
|
cpu_openrisc_count_stop(cpu);
|
|
break;
|
|
case TIMER_CONT:
|
|
break;
|
|
}
|
|
|
|
cpu_openrisc_timer_update(cpu);
|
|
qemu_cpu_kick(CPU(cpu));
|
|
}
|
|
|
|
static const VMStateDescription vmstate_or1k_timer = {
|
|
.name = "or1k_timer",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_UINT32(ttcr, OR1KTimerState),
|
|
VMSTATE_UINT64(last_clk, OR1KTimerState),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
void cpu_openrisc_clock_init(OpenRISCCPU *cpu)
|
|
{
|
|
cpu->env.timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &openrisc_timer_cb, cpu);
|
|
cpu->env.ttmr = 0x00000000;
|
|
|
|
if (or1k_timer == NULL) {
|
|
or1k_timer = g_new0(OR1KTimerState, 1);
|
|
vmstate_register(NULL, 0, &vmstate_or1k_timer, or1k_timer);
|
|
}
|
|
}
|