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hw/mips/cps: Expose input clock and connect it to CPU cores 

Expose a qdev input clock named 'clk-in', and connect it to each
core to forward-propagate the clock.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20201012095804.3335117-18-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-10-12 11:58:00 +02:00
parent 79b99fe3f0
commit e8373c5653
2 changed files with 6 additions and 0 deletions
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4
hw/mips/cps.c
View File

@ -22,6 +22,7 @@
#include "qemu/module.h"
#include "hw/mips/cps.h"
#include "hw/mips/mips.h"
#include "hw/qdev-clock.h"
#include "hw/qdev-properties.h"
#include "hw/mips/cpudevs.h"
#include "sysemu/kvm.h"
@ -38,6 +39,7 @@ static void mips_cps_init(Object *obj)
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
MIPSCPSState *s = MIPS_CPS(obj);
s->clock = qdev_init_clock_in(DEVICE(obj), "clk-in", NULL, NULL);
/*
* Cover entire address space as there do not seem to be any
* constraints for the base address of CPC and GIC.
@ -80,6 +82,8 @@ static void mips_cps_realize(DeviceState *dev, Error **errp)
errp)) {
return;
}
/* All cores use the same clock tree */
qdev_connect_clock_in(DEVICE(cpu), "clk-in", s->clock);
if (!qdev_realize_and_unref(DEVICE(cpu), NULL, errp)) {
return;

2
include/hw/mips/cps.h
View File

@ -21,6 +21,7 @@
#define MIPS_CPS_H
#include "hw/sysbus.h"
#include "hw/clock.h"
#include "hw/misc/mips_cmgcr.h"
#include "hw/intc/mips_gic.h"
#include "hw/misc/mips_cpc.h"
@ -43,6 +44,7 @@ struct MIPSCPSState {
MIPSGICState gic;
MIPSCPCState cpc;
MIPSITUState itu;
Clock *clock;
};
qemu_irq get_cps_irq(MIPSCPSState *cps, int pin_number);