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-rw-r--r--arch/nios/cpu/cpu.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/arch/nios/cpu/cpu.c b/arch/nios/cpu/cpu.c
new file mode 100644
index 0000000..5519e82
--- /dev/null
+++ b/arch/nios/cpu/cpu.c
@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <nios.h>
+
+
+int checkcpu (void)
+{
+ unsigned val;
+ unsigned rev_major;
+ unsigned rev_minor;
+ short nregs, hi_limit, lo_limit;
+
+ /* Get cpu version info */
+ val = rdctl (CTL_CPU_ID);
+ puts ("CPU: ");
+ printf ("%s", (val & 0x00008000) ? "Nios-16 " : "Nios-32 ");
+ rev_major = (val>>12) & 0x07;
+ rev_minor = (val>>4) & 0x0ff;
+ printf ("Rev. %d.%d (0x%04x)", rev_major, rev_minor,
+ val & 0xffff);
+ if (rev_major == 0x08)
+ printf (" [OpenCore (R) Plus]");
+ printf ("\n");
+
+ /* Check register file */
+ val = rdctl (CTL_WVALID);
+ lo_limit = val & 0x01f;
+ hi_limit = (val>>5) & 0x1f;
+ nregs = (hi_limit + 2) * 16;
+ printf ("Reg file size: %d LO_LIMIT/HI_LIMIT: %d/%d\n",
+ nregs, lo_limit, hi_limit);
+
+ return (0);
+}
+
+
+int do_reset (void)
+{
+ /* trap 0 does the trick ... at least with the OCI debug
+ * present -- haven't tested without it yet (stm).
+ */
+ disable_interrupts ();
+ ipri (1);
+ asm volatile ("trap 0\n");
+
+ /* No return ;-) */
+
+ return(0);
+}
+
+
+#if defined(CONFIG_WATCHDOG)
+void watchdog_reset (void)
+{
+}
+#endif /* CONFIG_WATCHDOG */