Standalone sis - initial commit

1 files changed, 107 insertions, 0 deletions

diff --git a/grlib.c b/grlib.c
new file mode 100644
index 0000000..52f78ff
--- /dev/null
+++ b/grlib.c
@@ -0,0 +1,107 @@
+/*
+ * This file is part of SIS.
+ *
+ * SIS, SPARC instruction simulator. Copyright (C) 2014 Jiri Gaisler
+ *
+ * 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 "sis.h"
+#include "grlib.h"
+
+
+/* APB PNP */
+
+static uint32 apbppmem[32 * 2];	/* 32-entry APB PP AREA */
+static int apbppindex;
+
+int
+grlib_apbpp_add (uint32 id, uint32 addr)
+{
+  apbppmem[apbppindex++] = id;
+  apbppmem[apbppindex++] = addr;
+  if (apbppindex >= (32 * 2))
+    apbppindex = 0;		/* prevent overflow of area */
+  return apbppindex;
+}
+
+uint32
+grlib_apbpnp_read (uint32 addr)
+{
+  uint32 read_data;
+  addr &= 0xff;
+  read_data = apbppmem[addr >> 2];
+
+  return read_data;
+}
+
+/* AHB PNP */
+
+static uint32 ahbppmem[128 * 8];	/* 128-entry AHB PP AREA */
+static int ahbmppindex;
+static int ahbsppindex = 64 * 8;
+
+int
+grlib_ahbmpp_add (uint32 id)
+{
+  ahbppmem[ahbmppindex] = id;
+  ahbmppindex += 8;
+  if (ahbmppindex >= (64 * 8))
+    ahbmppindex = 0;		/* prevent overflow of area */
+  return ahbmppindex;
+}
+
+int
+grlib_ahbspp_add (uint32 id, uint32 addr1, uint32 addr2,
+		  uint32 addr3, uint32 addr4)
+{
+  ahbppmem[ahbsppindex] = id;
+  ahbsppindex += 4;
+  ahbppmem[ahbsppindex++] = addr1;
+  ahbppmem[ahbsppindex++] = addr2;
+  ahbppmem[ahbsppindex++] = addr3;
+  ahbppmem[ahbsppindex++] = addr4;
+  if (ahbsppindex >= (128 * 8))
+    ahbsppindex = 64 * 8;	/* prevent overflow of area */
+  return ahbsppindex;
+}
+
+uint32
+grlib_ahbpnp_read (uint32 addr)
+{
+  uint32 read_data;
+
+  addr &= 0xfff;
+  read_data = ahbppmem[addr >> 2];
+  return read_data;
+
+}
+
+void
+grlib_init ()
+{
+  /* Add PP records for Leon3, APB bridge and interrupt controller
+     as this is not done elsewhere */
+
+  grlib_ahbmpp_add (GRLIB_PP_ID (VENDOR_GAISLER, GAISLER_LEON3, 0, 0));
+  grlib_ahbspp_add (GRLIB_PP_ID (VENDOR_GAISLER, GAISLER_APBMST, 0, 0),
+		    GRLIB_PP_AHBADDR (0x80000000, 0xFFF, 0, 0, 2), 0, 0, 0);
+
+  grlib_apbpp_add (GRLIB_PP_ID (VENDOR_GAISLER, GAISLER_IRQMP, 2, 0),
+		   GRLIB_PP_APBADDR (0x80000200, 0xFFF));
+
+}
+