misc: Move MemPool based calls to the SEWorkload.

These currently proxy to the System object, but this is one step towards
moving the MemPool-s out of the System and into the SEWorkload where
they really should have been from the start.

Change-Id: Id27e7b874c283abf07bd892c8467a9cc52e2fdff
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/50342
Reviewed-by: Matthew Poremba <matthew.poremba@amd.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/sim/process.cc

@@ -332,7 +332,7 @@ Process::allocateMem(Addr vaddr, int64_t size, bool clobber)
     }
 
     int npages = divCeil(size, pTable->pageSize());
-    Addr paddr = system->allocPhysPages(npages);
+    Addr paddr = seWorkload->allocPhysPages(npages);
     pTable->map(vaddr, paddr, size,
                 clobber ? EmulationPageTable::Clobber :
                           EmulationPageTable::MappingFlags(0));
@@ -343,7 +343,7 @@ Process::replicatePage(Addr vaddr, Addr new_paddr, ThreadContext *old_tc,
                        ThreadContext *new_tc, bool allocate_page)
 {
     if (allocate_page)
-        new_paddr = system->allocPhysPages(1);
+        new_paddr = seWorkload->allocPhysPages(1);
 
     // Read from old physical page.
     uint8_t buf_p[pTable->pageSize()];

src/sim/se_workload.cc

@@ -30,6 +30,7 @@
 #include "cpu/thread_context.hh"
 #include "params/SEWorkload.hh"
 #include "sim/process.hh"
+#include "sim/system.hh"
 
 namespace gem5
 {
@@ -43,4 +44,22 @@ SEWorkload::syscall(ThreadContext *tc)
     tc->getProcessPtr()->syscall(tc);
 }
 
+Addr
+SEWorkload::allocPhysPages(int npages, int pool_id)
+{
+    return system->allocPhysPages(npages, pool_id);
+}
+
+Addr
+SEWorkload::memSize(int pool_id) const
+{
+    return system->memSize(pool_id);
+}
+
+Addr
+SEWorkload::freeMemSize(int pool_id) const
+{
+    return system->freeMemSize(pool_id);
+}
+
 } // namespace gem5

src/sim/se_workload.hh

@@ -78,6 +78,10 @@ class SEWorkload : public Workload
 
     // For now, assume the only type of events are system calls.
     void event(ThreadContext *tc) override { syscall(tc); }
+
+    Addr allocPhysPages(int npages, int pool_id=0);
+    Addr memSize(int pool_id=0) const;
+    Addr freeMemSize(int pool_id=0) const;
 };
 
 } // namespace gem5