X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fmips%2Fbasler%2Fexcite%2Fexcite_prom.c;fp=arch%2Fmips%2Fbasler%2Fexcite%2Fexcite_prom.c;h=6ecd512b999dee1061b2f1914b5059416041591b;hb=f05f9504c50ed069377d37f02f22e7a16b5921de;hp=0000000000000000000000000000000000000000;hpb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;p=linux-2.6.git

diff --git a/arch/mips/basler/excite/excite_prom.c b/arch/mips/basler/excite/excite_prom.c
new file mode 100644
index 000000000..6ecd512b9
--- /dev/null
+++ b/arch/mips/basler/excite/excite_prom.c
@@ -0,0 +1,147 @@
+/*
+ *  Copyright (C) 2004, 2005 by Thomas Koeller (thomas.koeller@baslerweb.com)
+ *  Based on the PMC-Sierra Yosemite board support by Ralf Baechle and
+ *  Manish Lachwani.
+ *
+ *  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 <linux/init.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/smp.h>
+#include <linux/module.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/reboot.h>
+#include <asm/system.h>
+#include <asm/bootinfo.h>
+#include <asm/string.h>
+
+#include <excite.h>
+
+/* This struct is used by Redboot to pass arguments to the kernel */
+typedef struct
+{
+	char *name;
+	char *val;
+} t_env_var;
+
+struct parmblock {
+	t_env_var memsize;
+	t_env_var modetty0;
+	t_env_var ethaddr;
+	t_env_var env_end;
+	char *argv[2];
+	char text[0];
+};
+
+static unsigned int prom_argc;
+static const char ** prom_argv;
+static const t_env_var * prom_env;
+
+static void prom_halt(void) __attribute__((noreturn));
+static void prom_exit(void) __attribute__((noreturn));
+
+
+
+const char *get_system_type(void)
+{
+	return "Basler eXcite";
+}
+
+/*
+ * Halt the system
+ */
+static void prom_halt(void)
+{
+	printk(KERN_NOTICE "\n** System halted.\n");
+	while (1)
+		asm volatile (
+			"\t.set\tmips3\n"
+			"\twait\n"
+			"\t.set\tmips0\n"
+		);
+}
+
+/*
+ * Reset the CPU and re-enter Redboot
+ */
+static void prom_exit(void)
+{
+	unsigned int i;
+	volatile unsigned char * const flg =
+		(volatile unsigned char *) (EXCITE_ADDR_FPGA + EXCITE_FPGA_DPR);
+
+	/* Clear the watchdog reset flag, set the reboot flag */
+	*flg &= ~0x01;
+	*flg |= 0x80;
+
+	for (i = 0; i < 10; i++) {
+		*(volatile unsigned char *)  (EXCITE_ADDR_FPGA + EXCITE_FPGA_SYSCTL) = 0x02;
+		iob();
+		mdelay(1000);
+	}
+
+	printk(KERN_NOTICE "Reset failed\n");
+	prom_halt();
+}
+
+static const char __init *prom_getenv(char *name)
+{
+	const t_env_var * p;
+	for (p = prom_env; p->name != NULL; p++)
+		if(strcmp(name, p->name) == 0)
+			break;
+	return p->val;
+}
+
+/*
+ * Init routine which accepts the variables from Redboot
+ */
+void __init prom_init(void)
+{
+	const struct parmblock * const pb = (struct parmblock *) fw_arg2;
+
+	prom_argc = fw_arg0;
+	prom_argv = (const char **) fw_arg1;
+	prom_env = &pb->memsize;
+
+	/* Callbacks for halt, restart */
+	_machine_restart = (void (*)(char *)) prom_exit;
+	_machine_halt = prom_halt;
+
+#ifdef CONFIG_32BIT
+	/* copy command line */
+	strcpy(arcs_cmdline, prom_argv[1]);
+	memsize = simple_strtol(prom_getenv("memsize"), NULL, 16);
+	strcpy(modetty, prom_getenv("modetty0"));
+#endif /* CONFIG_32BIT */
+
+#ifdef CONFIG_64BIT
+#	error 64 bit support not implemented
+#endif /* CONFIG_64BIT */
+
+	mips_machgroup = MACH_GROUP_TITAN;
+	mips_machtype = MACH_TITAN_EXCITE;
+}
+
+/* This is called from free_initmem(), so we need to provide it */
+void __init prom_free_prom_memory(void)
+{
+	/* Nothing to do */
+}