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, 201 insertions, 0 deletions

diff --git a/sim/bfin/dv-bfin_ebiu_sdc.c b/sim/bfin/dv-bfin_ebiu_sdc.c
new file mode 100644
index 00000000000..710f2f8f9a8
--- /dev/null
+++ b/sim/bfin/dv-bfin_ebiu_sdc.c
@@ -0,0 +1,201 @@
+/* Blackfin External Bus Interface Unit (EBIU) SDRAM Controller (SDC) 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_ebiu_sdc.h"
+
+struct bfin_ebiu_sdc
+{
+  bu32 base;
+  int type;
+  bu32 reg_size, bank_size;
+
+  /* Order after here is important -- matches hardware MMR layout.  */
+  bu32 sdgctl;
+  bu32 sdbctl;	/* 16bit on most parts ... */
+  bu16 BFIN_MMR_16(sdrrc);
+  bu16 BFIN_MMR_16(sdstat);
+};
+#define mmr_base()      offsetof(struct bfin_ebiu_sdc, sdgctl)
+#define mmr_offset(mmr) (offsetof(struct bfin_ebiu_sdc, mmr) - mmr_base())
+
+static const char * const mmr_names[] = {
+  "EBIU_SDGCTL", "EBIU_SDBCTL", "EBIU_SDRRC", "EBIU_SDSTAT",
+};
+#define mmr_name(off) mmr_names[(off) / 4]
+
+static unsigned
+bfin_ebiu_sdc_io_write_buffer (struct hw *me, const void *source,
+			       int space, address_word addr, unsigned nr_bytes)
+{
+  struct bfin_ebiu_sdc *sdc = 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 - sdc->base;
+  valuep = (void *)((unsigned long)sdc + mmr_base() + mmr_off);
+  value16p = valuep;
+  value32p = valuep;
+
+  HW_TRACE_WRITE ();
+
+  switch (mmr_off)
+    {
+    case mmr_offset(sdgctl):
+      /* XXX: SRFS should make external mem unreadable.  */
+      *value32p = value;
+      break;
+    case mmr_offset(sdbctl):
+      if (sdc->type == 561)
+	{
+	  dv_bfin_mmr_require_32 (me, addr, nr_bytes, true);
+	  *value32p = value;
+	}
+      else
+	{
+	  dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
+	  *value16p = value;
+	}
+      break;
+    case mmr_offset(sdrrc):
+      dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
+      *value16p = value;
+      break;
+    case mmr_offset(sdstat):
+      dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
+      /* XXX: Some bits are W1C ...  */
+      break;
+    }
+
+  return nr_bytes;
+}
+
+static unsigned
+bfin_ebiu_sdc_io_read_buffer (struct hw *me, void *dest,
+			      int space, address_word addr, unsigned nr_bytes)
+{
+  struct bfin_ebiu_sdc *sdc = hw_data (me);
+  bu32 mmr_off;
+  bu32 *value32p;
+  bu16 *value16p;
+  void *valuep;
+
+  mmr_off = addr - sdc->base;
+  valuep = (void *)((unsigned long)sdc + mmr_base() + mmr_off);
+  value16p = valuep;
+  value32p = valuep;
+
+  HW_TRACE_READ ();
+
+  switch (mmr_off)
+    {
+    case mmr_offset(sdgctl):
+      dv_store_4 (dest, *value32p);
+      break;
+    case mmr_offset(sdbctl):
+      if (sdc->type == 561)
+	{
+	  dv_bfin_mmr_require_32 (me, addr, nr_bytes, false);
+	  dv_store_4 (dest, *value32p);
+	}
+      else
+	{
+	  dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
+	  dv_store_2 (dest, *value16p);
+	}
+      break;
+    case mmr_offset(sdrrc):
+    case mmr_offset(sdstat):
+      dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
+      dv_store_2 (dest, *value16p);
+      break;
+    }
+
+  return nr_bytes;
+}
+
+static void
+attach_bfin_ebiu_sdc_regs (struct hw *me, struct bfin_ebiu_sdc *sdc)
+{
+  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_EBIU_SDC_SIZE)
+    hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EBIU_SDC_SIZE);
+
+  hw_attach_address (hw_parent (me),
+		     0, attach_space, attach_address, attach_size, me);
+
+  sdc->base = attach_address;
+}
+
+static void
+bfin_ebiu_sdc_finish (struct hw *me)
+{
+  struct bfin_ebiu_sdc *sdc;
+
+  sdc = HW_ZALLOC (me, struct bfin_ebiu_sdc);
+
+  set_hw_data (me, sdc);
+  set_hw_io_read_buffer (me, bfin_ebiu_sdc_io_read_buffer);
+  set_hw_io_write_buffer (me, bfin_ebiu_sdc_io_write_buffer);
+
+  attach_bfin_ebiu_sdc_regs (me, sdc);
+
+  sdc->type = hw_find_integer_property (me, "type");
+
+  /* Initialize the SDC.  */
+  sdc->sdgctl = 0xE0088849;
+  sdc->sdbctl = 0x00000000;
+  sdc->sdrrc = 0x081A;
+  sdc->sdstat = 0x0008;
+
+  /* XXX: We boot with 64M external memory by default ...  */
+  sdc->sdbctl |= EBE | EBSZ_64 | EBCAW_10;
+}
+
+const struct hw_descriptor dv_bfin_ebiu_sdc_descriptor[] = {
+  {"bfin_ebiu_sdc", bfin_ebiu_sdc_finish,},
+  {NULL, NULL},
+};