sim: bfin: new port

This can boot Das U-Boot and a Linux kernel.  It also supports Linux
userspace FLAT and FDPIC (dynamic and static) ELFs.

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

1 files changed, 194 insertions, 0 deletions

diff --git a/sim/bfin/dv-bfin_rtc.c b/sim/bfin/dv-bfin_rtc.c
new file mode 100644
index 0000000..6d8aa3d
--- /dev/null
+++ b/sim/bfin/dv-bfin_rtc.c
@@ -0,0 +1,194 @@
+/* Blackfin Real Time Clock (RTC) 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 <time.h>
+#include "sim-main.h"
+#include "dv-sockser.h"
+#include "devices.h"
+#include "dv-bfin_rtc.h"
+
+/* XXX: This read-only stub setup is based on host system clock.  */
+
+struct bfin_rtc
+{
+  bu32 base;
+  bu32 stat_shadow;
+
+  /* Order after here is important -- matches hardware MMR layout.  */
+  bu32 stat;
+  bu16 BFIN_MMR_16(ictl);
+  bu16 BFIN_MMR_16(istat);
+  bu16 BFIN_MMR_16(swcnt);
+  bu32 alarm;
+  bu16 BFIN_MMR_16(pren);
+};
+#define mmr_base()      offsetof(struct bfin_rtc, stat)
+#define mmr_offset(mmr) (offsetof(struct bfin_rtc, mmr) - mmr_base())
+
+static const char * const mmr_names[] = {
+  "RTC_STAT", "RTC_ICTL", "RTC_ISTAT", "RTC_SWCNT", "RTC_ALARM", "RTC_PREN",
+};
+#define mmr_name(off) mmr_names[(off) / 4]
+
+static unsigned
+bfin_rtc_io_write_buffer (struct hw *me, const void *source,
+			  int space, address_word addr, unsigned nr_bytes)
+{
+  struct bfin_rtc *rtc = hw_data (me);
+  bu32 mmr_off;
+  bu32 value;
+  bu16 *value16p;
+  bu32 *value32p;
+  void *valuep;
+
+  if (nr_bytes == 4)
+    value = dv_load_4 (source);
+  else
+    value = dv_load_2 (source);
+
+  mmr_off = addr - rtc->base;
+  valuep = (void *)((unsigned long)rtc + mmr_base() + mmr_off);
+  value16p = valuep;
+  value32p = valuep;
+
+  HW_TRACE_WRITE ();
+
+  /* XXX: These probably need more work.  */
+  switch (mmr_off)
+    {
+    case mmr_offset(stat):
+      /* XXX: Ignore these since we are wired to host.  */
+      break;
+    case mmr_offset(istat):
+      dv_w1c_2 (value16p, value, 1 << 14);
+      break;
+    case mmr_offset(alarm):
+      break;
+    case mmr_offset(ictl):
+      /* XXX: This should schedule an event handler.  */
+    case mmr_offset(swcnt):
+    case mmr_offset(pren):
+      break;
+    }
+
+  return nr_bytes;
+}
+
+static unsigned
+bfin_rtc_io_read_buffer (struct hw *me, void *dest,
+			 int space, address_word addr, unsigned nr_bytes)
+{
+  struct bfin_rtc *rtc = hw_data (me);
+  bu32 mmr_off;
+  bu16 *value16p;
+  bu32 *value32p;
+  void *valuep;
+
+  mmr_off = addr - rtc->base;
+  valuep = (void *)((unsigned long)rtc + mmr_base() + mmr_off);
+  value16p = valuep;
+  value32p = valuep;
+
+  HW_TRACE_READ ();
+
+  switch (mmr_off)
+    {
+    case mmr_offset(stat):
+      {
+	time_t t = time (NULL);
+	struct tm *tm = localtime (&t);
+	bu32 value =
+	  (((tm->tm_year - 70) * 365 + tm->tm_yday) << 17) |
+	  (tm->tm_hour << 12) |
+	  (tm->tm_min << 6) |
+	  (tm->tm_sec << 0);
+	dv_store_4 (dest, value);
+	break;
+      }
+    case mmr_offset(alarm):
+      dv_store_4 (dest, *value32p);
+      break;
+    case mmr_offset(istat):
+    case mmr_offset(ictl):
+    case mmr_offset(swcnt):
+    case mmr_offset(pren):
+      dv_store_2 (dest, *value16p);
+      break;
+    }
+
+  return nr_bytes;
+}
+
+static const struct hw_port_descriptor bfin_rtc_ports[] = {
+  { "rtc", 0, 0, output_port, },
+  { NULL, 0, 0, 0, },
+};
+
+static void
+attach_bfin_rtc_regs (struct hw *me, struct bfin_rtc *rtc)
+{
+  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_MMR_RTC_SIZE)
+    hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_RTC_SIZE);
+
+  hw_attach_address (hw_parent (me),
+		     0, attach_space, attach_address, attach_size, me);
+
+  rtc->base = attach_address;
+}
+
+static void
+bfin_rtc_finish (struct hw *me)
+{
+  struct bfin_rtc *rtc;
+
+  rtc = HW_ZALLOC (me, struct bfin_rtc);
+
+  set_hw_data (me, rtc);
+  set_hw_io_read_buffer (me, bfin_rtc_io_read_buffer);
+  set_hw_io_write_buffer (me, bfin_rtc_io_write_buffer);
+  set_hw_ports (me, bfin_rtc_ports);
+
+  attach_bfin_rtc_regs (me, rtc);
+
+  /* Initialize the RTC.  */
+}
+
+const struct hw_descriptor dv_bfin_rtc_descriptor[] = {
+  {"bfin_rtc", bfin_rtc_finish,},
+  {NULL, NULL},
+};