1 files changed, 92 insertions, 0 deletions
diff --git a/arch/i386/cpu/cpu.c b/arch/i386/cpu/cpu.c
new file mode 100644
index 0000000..3010519
--- /dev/null
+++ b/arch/i386/cpu/cpu.c
@@ -0,0 +1,92 @@
+/*
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * 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
+ */
+
+/*
+ * CPU specific code
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/interrupt.h>
+
+int cpu_init_f(void)
+{
+	/* initialize FPU, reset EM, set MP and NE */
+	asm ("fninit\n" \
+	     "movl %cr0, %eax\n" \
+	     "andl $~0x4, %eax\n" \
+	     "orl  $0x22, %eax\n" \
+	     "movl %eax, %cr0\n" );
+
+	return 0;
+}
+
+int cpu_init_r(void)
+{
+	/* Initialize core interrupt and exception functionality of CPU */
+	cpu_init_interrupts ();
+	return 0;
+}
+
+int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	printf ("resetting ...\n");
+	udelay(50000);				/* wait 50 ms */
+	disable_interrupts();
+	reset_cpu(0);
+
+	/*NOTREACHED*/
+	return 0;
+}
+
+void  flush_cache (unsigned long dummy1, unsigned long dummy2)
+{
+	asm("wbinvd\n");
+	return;
+}
+
+void __attribute__ ((regparm(0))) generate_gpf(void);
+
+/* segment 0x70 is an arbitrary segment which does not exist */
+asm(".globl generate_gpf\n"
+    ".hidden generate_gpf\n"
+    ".type generate_gpf, @function\n"
+    "generate_gpf:\n"
+    "ljmp   $0x70, $0x47114711\n");
+
+void __reset_cpu(ulong addr)
+{
+	printf("Resetting using i386 Triple Fault\n");
+	set_vector(13, generate_gpf);  /* general protection fault handler */
+	set_vector(8, generate_gpf);   /* double fault handler */
+	generate_gpf();                /* start the show */
+}
+void reset_cpu(ulong addr) __attribute__((weak, alias("__reset_cpu")));