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, 231 insertions, 0 deletions

diff --git a/sim/bfin/dv-bfin_ppi.c b/sim/bfin/dv-bfin_ppi.c
new file mode 100644
index 00000000000..fc72b947b39
--- /dev/null
+++ b/sim/bfin/dv-bfin_ppi.c
@@ -0,0 +1,231 @@
+/* Blackfin Parallel Port Interface (PPI) model
+   For "old style" PPIs on BF53x/etc... parts.
+
+   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_ppi.h"
+#include "gui.h"
+
+/* XXX: TX is merely a stub.  */
+
+struct bfin_ppi
+{
+  /* This top portion matches common dv_bfin struct.  */
+  bu32 base;
+  struct hw *dma_master;
+  bool acked;
+
+  struct hw_event *handler;
+  char saved_byte;
+  int saved_count;
+
+  /* GUI state.  */
+  void *gui_state;
+  int color;
+
+  /* Order after here is important -- matches hardware MMR layout.  */
+  bu16 BFIN_MMR_16(control);
+  bu16 BFIN_MMR_16(status);
+  bu16 BFIN_MMR_16(count);
+  bu16 BFIN_MMR_16(delay);
+  bu16 BFIN_MMR_16(frame);
+};
+#define mmr_base()      offsetof(struct bfin_ppi, control)
+#define mmr_offset(mmr) (offsetof(struct bfin_ppi, mmr) - mmr_base())
+
+static const char * const mmr_names[] = {
+  "PPI_CONTROL", "PPI_STATUS", "PPI_COUNT", "PPI_DELAY", "PPI_FRAME",
+};
+#define mmr_name(off) mmr_names[(off) / 4]
+
+static void
+bfin_ppi_gui_setup (struct bfin_ppi *ppi)
+{
+  int bpp;
+
+  /* If we are in RX mode, nothing to do.  */
+  if (!(ppi->control & PORT_DIR))
+    return;
+
+  bpp = bfin_gui_color_depth (ppi->color);
+  ppi->gui_state = bfin_gui_setup (ppi->gui_state,
+				   ppi->control & PORT_EN,
+				   (ppi->count + 1) / (bpp / 8),
+				   ppi->frame,
+				   ppi->color);
+}
+
+static unsigned
+bfin_ppi_io_write_buffer (struct hw *me, const void *source, int space,
+			  address_word addr, unsigned nr_bytes)
+{
+  struct bfin_ppi *ppi = hw_data (me);
+  bu32 mmr_off;
+  bu32 value;
+  bu16 *valuep;
+
+  value = dv_load_2 (source);
+  mmr_off = addr - ppi->base;
+  valuep = (void *)((unsigned long)ppi + mmr_base() + mmr_off);
+
+  HW_TRACE_WRITE ();
+
+  dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
+
+  switch (mmr_off)
+    {
+    case mmr_offset(control):
+      *valuep = value;
+      bfin_ppi_gui_setup (ppi);
+      break;
+    case mmr_offset(count):
+    case mmr_offset(delay):
+    case mmr_offset(frame):
+      *valuep = value;
+      break;
+    case mmr_offset(status):
+      dv_w1c_2 (valuep, value, (1 << 10));
+      break;
+    default:
+      dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
+      break;
+    }
+
+  return nr_bytes;
+}
+
+static unsigned
+bfin_ppi_io_read_buffer (struct hw *me, void *dest, int space,
+			 address_word addr, unsigned nr_bytes)
+{
+  struct bfin_ppi *ppi = hw_data (me);
+  bu32 mmr_off;
+  bu16 *valuep;
+
+  mmr_off = addr - ppi->base;
+  valuep = (void *)((unsigned long)ppi + mmr_base() + mmr_off);
+
+  HW_TRACE_READ ();
+
+  dv_bfin_mmr_require_16 (me, addr, nr_bytes, false);
+
+  switch (mmr_off)
+    {
+    case mmr_offset(control):
+    case mmr_offset(count):
+    case mmr_offset(delay):
+    case mmr_offset(frame):
+    case mmr_offset(status):
+      dv_store_2 (dest, *valuep);
+      break;
+    default:
+      dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
+      break;
+    }
+
+  return nr_bytes;
+}
+
+static unsigned
+bfin_ppi_dma_read_buffer (struct hw *me, void *dest, int space,
+			  unsigned_word addr, unsigned nr_bytes)
+{
+  HW_TRACE_DMA_READ ();
+  return 0;
+}
+
+static unsigned
+bfin_ppi_dma_write_buffer (struct hw *me, const void *source,
+			   int space, unsigned_word addr,
+			   unsigned nr_bytes,
+			   int violate_read_only_section)
+{
+  struct bfin_ppi *ppi = hw_data (me);
+
+  HW_TRACE_DMA_WRITE ();
+
+  return bfin_gui_update (ppi->gui_state, source, nr_bytes);
+}
+
+static const struct hw_port_descriptor bfin_ppi_ports[] = {
+  { "stat", 0, 0, output_port, },
+  { NULL, 0, 0, 0, },
+};
+
+static void
+attach_bfin_ppi_regs (struct hw *me, struct bfin_ppi *ppi)
+{
+  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_PPI_SIZE)
+    hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_PPI_SIZE);
+
+  hw_attach_address (hw_parent (me),
+		     0, attach_space, attach_address, attach_size, me);
+
+  ppi->base = attach_address;
+}
+
+static void
+bfin_ppi_finish (struct hw *me)
+{
+  struct bfin_ppi *ppi;
+  const char *color;
+
+  ppi = HW_ZALLOC (me, struct bfin_ppi);
+
+  set_hw_data (me, ppi);
+  set_hw_io_read_buffer (me, bfin_ppi_io_read_buffer);
+  set_hw_io_write_buffer (me, bfin_ppi_io_write_buffer);
+  set_hw_dma_read_buffer (me, bfin_ppi_dma_read_buffer);
+  set_hw_dma_write_buffer (me, bfin_ppi_dma_write_buffer);
+  set_hw_ports (me, bfin_ppi_ports);
+
+  attach_bfin_ppi_regs (me, ppi);
+
+  /* Initialize the PPI.  */
+  if (hw_find_property (me, "color"))
+    color = hw_find_string_property (me, "color");
+  else
+    color = NULL;
+  ppi->color = bfin_gui_color (color);
+}
+
+const struct hw_descriptor dv_bfin_ppi_descriptor[] = {
+  {"bfin_ppi", bfin_ppi_finish,},
+  {NULL, NULL},
+};