dev-arm: Make CpuLocalTimer use standard ArmInterruptPin

Change-Id: I8c4eb9389b47df8cdf1eec966bb2c9da85a7a7c8
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/12744
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>

3 files changed, 56 insertions, 42 deletions

diff --git a/src/dev/arm/RealView.py b/src/dev/arm/RealView.py
index e8a7cd6d4..3f1803037 100644
--- a/src/dev/arm/RealView.py
+++ b/src/dev/arm/RealView.py
@@ -410,9 +410,8 @@ class A9GlobalTimer(BasicPioDevice):
 class CpuLocalTimer(BasicPioDevice):
     type = 'CpuLocalTimer'
     cxx_header = "dev/arm/timer_cpulocal.hh"
-    gic = Param.BaseGic(Parent.any, "Gic to use for interrupting")
-    int_num_timer = Param.UInt32("Interrrupt number used per-cpu to GIC")
-    int_num_watchdog = Param.UInt32("Interrupt number for per-cpu watchdog to GIC")
+    int_timer = Param.ArmPPI("Interrrupt used per-cpu to GIC")
+    int_watchdog = Param.ArmPPI("Interrupt for per-cpu watchdog to GIC")
 
 class GenericTimer(ClockedObject):
     type = 'GenericTimer'
@@ -621,7 +620,8 @@ class RealViewPBX(RealView):
     timer0 = Sp804(int_num0=36, int_num1=36, pio_addr=0x10011000)
     timer1 = Sp804(int_num0=37, int_num1=37, pio_addr=0x10012000)
     global_timer = A9GlobalTimer(int_num=27, pio_addr=0x1f000200)
-    local_cpu_timer = CpuLocalTimer(int_num_timer=29, int_num_watchdog=30,
+    local_cpu_timer = CpuLocalTimer(int_timer=ArmPPI(num=29),
+                                    int_watchdog=ArmPPI(num=30),
                                     pio_addr=0x1f000600)
     clcd = Pl111(pio_addr=0x10020000, int_num=55)
     kmi0   = Pl050(pio_addr=0x10006000, int_num=52, ps2=PS2Keyboard())
@@ -877,7 +877,8 @@ class VExpress_EMM(RealView):
     gic = GicV2(dist_addr=0x2C001000, cpu_addr=0x2C002000)
     vgic   = VGic(vcpu_addr=0x2c006000, hv_addr=0x2c004000, ppint=25)
 
-    local_cpu_timer = CpuLocalTimer(int_num_timer=29, int_num_watchdog=30,
+    local_cpu_timer = CpuLocalTimer(int_timer=ArmPPI(num=29),
+                                    int_watchdog=ArmPPI(num=30),
                                     pio_addr=0x2C080000)
 
     hdlcd  = HDLcd(pxl_clk=dcc.osc_pxl,
diff --git a/src/dev/arm/timer_cpulocal.cc b/src/dev/arm/timer_cpulocal.cc
index 033031547..9e9946b1f 100644
--- a/src/dev/arm/timer_cpulocal.cc
+++ b/src/dev/arm/timer_cpulocal.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2013 ARM Limited
+ * Copyright (c) 2010-2013,2018 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -40,6 +40,7 @@
 
 #include "dev/arm/timer_cpulocal.hh"
 
+#include "arch/arm/system.hh"
 #include "base/intmath.hh"
 #include "base/trace.hh"
 #include "debug/Checkpoint.hh"
@@ -49,23 +50,38 @@
 #include "mem/packet_access.hh"
 
 CpuLocalTimer::CpuLocalTimer(Params *p)
-    : BasicPioDevice(p, 0x38), gic(p->gic)
+    : BasicPioDevice(p, 0x38)
 {
+}
+
+void
+CpuLocalTimer::init()
+{
+   auto p = params();
    // Initialize the timer registers for each per cpu timer
-   for (int i = 0; i < CPU_MAX; i++) {
+   for (int i = 0; i < sys->numContexts(); i++) {
+        ThreadContext* tc = sys->getThreadContext(i);
         std::stringstream oss;
         oss << name() << ".timer" << i;
-        localTimer[i]._name = oss.str();
-        localTimer[i].parent = this;
-        localTimer[i].intNumTimer = p->int_num_timer;
-        localTimer[i].intNumWatchdog = p->int_num_watchdog;
-        localTimer[i].cpuNum = i;
+
+        localTimer.emplace_back(
+            new Timer(oss.str(), this,
+                      p->int_timer->get(tc),
+                      p->int_watchdog->get(tc)));
     }
+
+    BasicPioDevice::init();
 }
 
-CpuLocalTimer::Timer::Timer()
-    : timerControl(0x0), watchdogControl(0x0), rawIntTimer(false), rawIntWatchdog(false),
-      rawResetWatchdog(false), watchdogDisableReg(0x0), pendingIntTimer(false), pendingIntWatchdog(false),
+CpuLocalTimer::Timer::Timer(const std::string &timer_name,
+                            CpuLocalTimer* _parent,
+                            ArmInterruptPin* int_timer,
+                            ArmInterruptPin* int_watchdog)
+    : _name(timer_name), parent(_parent), intTimer(int_timer),
+      intWatchdog(int_watchdog), timerControl(0x0), watchdogControl(0x0),
+      rawIntTimer(false), rawIntWatchdog(false),
+      rawResetWatchdog(false), watchdogDisableReg(0x0),
+      pendingIntTimer(false), pendingIntWatchdog(false),
       timerLoadValue(0x0), watchdogLoadValue(0x0),
       timerZeroEvent([this]{ timerAtZero(); }, name()),
       watchdogZeroEvent([this]{ watchdogAtZero(); }, name())
@@ -81,10 +97,10 @@ CpuLocalTimer::read(PacketPtr pkt)
     ContextID cpu_id = pkt->req->contextId();
     DPRINTF(Timer, "Reading from CpuLocalTimer at offset: %#x\n", daddr);
     assert(cpu_id >= 0);
-    assert(cpu_id < CPU_MAX);
+    assert(cpu_id < localTimer.size());
 
     if (daddr < Timer::Size)
-        localTimer[cpu_id].read(pkt, daddr);
+        localTimer[cpu_id]->read(pkt, daddr);
     else
         panic("Tried to read CpuLocalTimer at offset %#x that doesn't exist\n", daddr);
     pkt->makeAtomicResponse();
@@ -159,10 +175,10 @@ CpuLocalTimer::write(PacketPtr pkt)
     ContextID cpu_id = pkt->req->contextId();
     DPRINTF(Timer, "Writing to CpuLocalTimer at offset: %#x\n", daddr);
     assert(cpu_id >= 0);
-    assert(cpu_id < CPU_MAX);
+    assert(cpu_id < localTimer.size());
 
     if (daddr < Timer::Size)
-        localTimer[cpu_id].write(pkt, daddr);
+        localTimer[cpu_id]->write(pkt, daddr);
     else
         panic("Tried to write CpuLocalTimer at offset %#x that doesn't exist\n", daddr);
     pkt->makeAtomicResponse();
@@ -297,7 +313,7 @@ CpuLocalTimer::Timer::timerAtZero()
         pendingIntTimer = true;
     if (pendingIntTimer && !old_pending) {
         DPRINTF(Timer, "-- Causing interrupt\n");
-        parent->gic->sendPPInt(intNumTimer, cpuNum);
+        intTimer->raise();
     }
 
     if (!timerControl.autoReload)
@@ -328,7 +344,7 @@ CpuLocalTimer::Timer::watchdogAtZero()
 
     if (pendingIntWatchdog && !old_pending) {
         DPRINTF(Timer, "-- Causing interrupt\n");
-        parent->gic->sendPPInt(intNumWatchdog, cpuNum);
+        intWatchdog->raise();
     }
 
     if (watchdogControl.watchdogMode)
@@ -341,8 +357,6 @@ void
 CpuLocalTimer::Timer::serialize(CheckpointOut &cp) const
 {
     DPRINTF(Checkpoint, "Serializing Arm CpuLocalTimer\n");
-    SERIALIZE_SCALAR(intNumTimer);
-    SERIALIZE_SCALAR(intNumWatchdog);
 
     uint32_t timer_control_serial = timerControl;
     uint32_t watchdog_control_serial = watchdogControl;
@@ -380,9 +394,6 @@ CpuLocalTimer::Timer::unserialize(CheckpointIn &cp)
 {
     DPRINTF(Checkpoint, "Unserializing Arm CpuLocalTimer\n");
 
-    UNSERIALIZE_SCALAR(intNumTimer);
-    UNSERIALIZE_SCALAR(intNumWatchdog);
-
     uint32_t timer_control_serial;
     UNSERIALIZE_SCALAR(timer_control_serial);
     timerControl = timer_control_serial;
@@ -421,15 +432,15 @@ CpuLocalTimer::Timer::unserialize(CheckpointIn &cp)
 void
 CpuLocalTimer::serialize(CheckpointOut &cp) const
 {
-    for (int i = 0; i < CPU_MAX; i++)
-        localTimer[i].serializeSection(cp, csprintf("timer%d", i));
+    for (int i = 0; i < sys->numContexts(); i++)
+        localTimer[i]->serializeSection(cp, csprintf("timer%d", i));
 }
 
 void
 CpuLocalTimer::unserialize(CheckpointIn &cp)
 {
-    for (int i = 0; i < CPU_MAX; i++)
-        localTimer[i].unserializeSection(cp, csprintf("timer%d", i));
+    for (int i = 0; i < sys->numContexts(); i++)
+        localTimer[i]->unserializeSection(cp, csprintf("timer%d", i));
 }
 
 CpuLocalTimer *
diff --git a/src/dev/arm/timer_cpulocal.hh b/src/dev/arm/timer_cpulocal.hh
index 425f1fd6b..df4aa511a 100644
--- a/src/dev/arm/timer_cpulocal.hh
+++ b/src/dev/arm/timer_cpulocal.hh
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010-2011 ARM Limited
+ * Copyright (c) 2010-2011,2018 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -51,6 +51,7 @@
  */
 
 class BaseGic;
+class ArmInterruptPin;
 
 class CpuLocalTimer : public BasicPioDevice
 {
@@ -96,12 +97,9 @@ class CpuLocalTimer : public BasicPioDevice
         /** Pointer to parent class */
         CpuLocalTimer *parent;
 
-        /** Number of interrupt to cause/clear */
-        uint32_t intNumTimer;
-        uint32_t intNumWatchdog;
-
-        /** Cpu this timer is attached to */
-        uint32_t cpuNum;
+        /** Interrupt to cause/clear */
+        ArmInterruptPin *intTimer;
+        ArmInterruptPin *intWatchdog;
 
         /** Control register as specified above */
         TimerCtrl timerControl;
@@ -135,7 +133,10 @@ class CpuLocalTimer : public BasicPioDevice
         void restartTimerCounter(uint32_t val);
         void restartWatchdogCounter(uint32_t val);
 
-        Timer();
+        Timer(const std::string &name,
+              CpuLocalTimer* _parent,
+              ArmInterruptPin* int_timer,
+              ArmInterruptPin* int_watchdog);
 
         std::string name() const { return _name; }
 
@@ -151,13 +152,11 @@ class CpuLocalTimer : public BasicPioDevice
         friend class CpuLocalTimer;
     };
 
-    static const int CPU_MAX = 8;
-
     /** Pointer to the GIC for causing an interrupt */
     BaseGic *gic;
 
     /** Timers that do the actual work */
-    Timer localTimer[CPU_MAX];
+    std::vector<std::unique_ptr<Timer>> localTimer;
 
   public:
     typedef CpuLocalTimerParams Params;
@@ -172,6 +171,9 @@ class CpuLocalTimer : public BasicPioDevice
       */
     CpuLocalTimer(Params *p);
 
+    /** Inits the local timers */
+    void init() override;
+
     /**
      * Handle a read to the device
      * @param pkt The memory request.