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-rw-r--r--arch/mips/sibyte/sb1250/prom.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/mips/sibyte/sb1250/prom.c b/arch/mips/sibyte/sb1250/prom.c
new file mode 100644
index 00000000000..de62ab0f55a
--- /dev/null
+++ b/arch/mips/sibyte/sb1250/prom.c
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2000, 2001 Broadcom Corporation
+ *
+ * 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/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/blkdev.h>
+#include <linux/bootmem.h>
+#include <linux/smp.h>
+#include <linux/initrd.h>
+
+#include <asm/bootinfo.h>
+#include <asm/reboot.h>
+
+#define MAX_RAM_SIZE ((CONFIG_SIBYTE_STANDALONE_RAM_SIZE * 1024 * 1024) - 1)
+
+static __init void prom_meminit(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ unsigned long initrd_pstart;
+ unsigned long initrd_pend;
+
+ initrd_pstart = __pa(initrd_start);
+ initrd_pend = __pa(initrd_end);
+ if (initrd_start &&
+ ((initrd_pstart > MAX_RAM_SIZE)
+ || (initrd_pend > MAX_RAM_SIZE))) {
+ panic("initrd out of addressable memory");
+ }
+
+ add_memory_region(0, initrd_pstart,
+ BOOT_MEM_RAM);
+ add_memory_region(initrd_pstart, initrd_pend - initrd_pstart,
+ BOOT_MEM_RESERVED);
+ add_memory_region(initrd_pend,
+ (CONFIG_SIBYTE_STANDALONE_RAM_SIZE * 1024 * 1024) - initrd_pend,
+ BOOT_MEM_RAM);
+#else
+ add_memory_region(0, CONFIG_SIBYTE_STANDALONE_RAM_SIZE * 1024 * 1024,
+ BOOT_MEM_RAM);
+#endif
+}
+
+void prom_cpu0_exit(void *unused)
+{
+ while (1) ;
+}
+
+static void prom_linux_exit(void)
+{
+#ifdef CONFIG_SMP
+ if (smp_processor_id()) {
+ smp_call_function(prom_cpu0_exit,NULL,1,1);
+ }
+#endif
+ while(1);
+}
+
+/*
+ * prom_init is called just after the cpu type is determined, from setup_arch()
+ */
+void __init prom_init(void)
+{
+ _machine_restart = (void (*)(char *))prom_linux_exit;
+ _machine_halt = prom_linux_exit;
+ _machine_power_off = prom_linux_exit;
+
+ strcpy(arcs_cmdline, "root=/dev/ram0 ");
+
+ mips_machgroup = MACH_GROUP_SIBYTE;
+ prom_meminit();
+}
+
+unsigned long __init prom_free_prom_memory(void)
+{
+ /* Not sure what I'm supposed to do here. Nothing, I think */
+ return 0;
+}
+
+void prom_putchar(char c)
+{
+}