This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / mips / basler / excite / excite_prom.c

diff --git a/arch/mips/basler/excite/excite_prom.c b/arch/mips/basler/excite/excite_prom.c
new file mode 100644 (file)
index 0000000..6ecd512
--- /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 */
+}