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>

diff --git a/hw/mips/cps.c b/hw/mips/cps.c
index 23c0f87e41aa15cb3188e15170305c875ec28ddb..af7b58c4bdd13c0df3441f57a666a96006824e7b 100644 (file)
--- a/hw/mips/cps.c
+++ b/hw/mips/cps.c
@@ -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;

diff --git a/include/hw/mips/cps.h b/include/hw/mips/cps.h
index 9e35a881366df2a3b818785815a494420432231c..859a8d4a674a8fe1ace01f0505dd390100d31745 100644 (file)
--- a/include/hw/mips/cps.h
+++ b/include/hw/mips/cps.h
@@ -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);