sim: bfin: add a performance monitor stub

No counters get updated, but there is enough here for software to
poke things and work.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 155 insertions, 0 deletions

diff --git a/sim/bfin/dv-bfin_pfmon.c b/sim/bfin/dv-bfin_pfmon.c
new file mode 100644
index 0000000..8b3e442
--- /dev/null
+++ b/sim/bfin/dv-bfin_pfmon.c
@@ -0,0 +1,155 @@
+/* Blackfin Performance Monitor model.
+
+   Copyright (C) 2010-2011 Free Software Foundation, Inc.
+   Contributed by Analog Devices, Inc.
+
+   This file is part of simulators.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+
+#include "sim-main.h"
+#include "devices.h"
+#include "dv-bfin_pfmon.h"
+
+/* XXX: This is mostly a stub.  */
+
+struct bfin_pfmon
+{
+  bu32 base;
+
+  /* Order after here is important -- matches hardware MMR layout.  */
+  bu32 ctl;
+  bu32 _pad0[63];
+  bu32 cntr0, cntr1;
+};
+#define mmr_base()      offsetof(struct bfin_pfmon, ctl)
+#define mmr_offset(mmr) (offsetof(struct bfin_pfmon, mmr) - mmr_base())
+
+static const char * const mmr_names[] =
+{
+  "PFCTL", [mmr_offset (cntr0)] = "PFCNTR0", "PFCNTR1",
+};
+#define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
+
+static unsigned
+bfin_pfmon_io_write_buffer (struct hw *me, const void *source, int space,
+			    address_word addr, unsigned nr_bytes)
+{
+  struct bfin_pfmon *pfmon = hw_data (me);
+  bu32 mmr_off;
+  bu32 value;
+  bu32 *valuep;
+
+  value = dv_load_4 (source);
+  mmr_off = addr - pfmon->base;
+  valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off);
+
+  HW_TRACE_WRITE ();
+
+  switch (mmr_off)
+    {
+    case mmr_offset(ctl):
+    case mmr_offset(cntr0):
+    case mmr_offset(cntr1):
+      *valuep = value;
+      break;
+    default:
+      dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
+      break;
+    }
+
+  return nr_bytes;
+}
+
+static unsigned
+bfin_pfmon_io_read_buffer (struct hw *me, void *dest, int space,
+			   address_word addr, unsigned nr_bytes)
+{
+  struct bfin_pfmon *pfmon = hw_data (me);
+  bu32 mmr_off;
+  bu32 value;
+  bu32 *valuep;
+
+  mmr_off = addr - pfmon->base;
+  valuep = (void *)((unsigned long)pfmon + mmr_base() + mmr_off);
+
+  HW_TRACE_READ ();
+
+  switch (mmr_off)
+    {
+    case mmr_offset(ctl):
+    case mmr_offset(cntr0):
+    case mmr_offset(cntr1):
+      value = *valuep;
+      break;
+    default:
+      while (1) /* Core MMRs -> exception -> doesn't return.  */
+	dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
+      break;
+    }
+
+  dv_store_4 (dest, value);
+
+  return nr_bytes;
+}
+
+static void
+attach_bfin_pfmon_regs (struct hw *me, struct bfin_pfmon *pfmon)
+{
+  address_word attach_address;
+  int attach_space;
+  unsigned attach_size;
+  reg_property_spec reg;
+
+  if (hw_find_property (me, "reg") == NULL)
+    hw_abort (me, "Missing \"reg\" property");
+
+  if (!hw_find_reg_array_property (me, "reg", 0, &reg))
+    hw_abort (me, "\"reg\" property must contain three addr/size entries");
+
+  hw_unit_address_to_attach_address (hw_parent (me),
+				     &reg.address,
+				     &attach_space, &attach_address, me);
+  hw_unit_size_to_attach_size (hw_parent (me), &reg.size, &attach_size, me);
+
+  if (attach_size != BFIN_COREMMR_PFMON_SIZE)
+    hw_abort (me, "\"reg\" size must be %#x", BFIN_COREMMR_PFMON_SIZE);
+
+  hw_attach_address (hw_parent (me),
+		     0, attach_space, attach_address, attach_size, me);
+
+  pfmon->base = attach_address;
+}
+
+static void
+bfin_pfmon_finish (struct hw *me)
+{
+  struct bfin_pfmon *pfmon;
+
+  pfmon = HW_ZALLOC (me, struct bfin_pfmon);
+
+  set_hw_data (me, pfmon);
+  set_hw_io_read_buffer (me, bfin_pfmon_io_read_buffer);
+  set_hw_io_write_buffer (me, bfin_pfmon_io_write_buffer);
+
+  attach_bfin_pfmon_regs (me, pfmon);
+}
+
+const struct hw_descriptor dv_bfin_pfmon_descriptor[] =
+{
+  {"bfin_pfmon", bfin_pfmon_finish,},
+  {NULL, NULL},
+};