1 files changed, 66 insertions, 0 deletions
diff --git a/arch/mips/ddb5476/prom.c b/arch/mips/ddb5476/prom.c
new file mode 100644
index 000000000..5edc7f3fa
--- /dev/null
+++ b/arch/mips/ddb5476/prom.c
@@ -0,0 +1,66 @@
+/*
+ *  arch/mips/ddb5476/prom.c -- NEC DDB Vrc-5476 PROM routines
+ *
+ *  Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
+ *                     Sony Software Development Center Europe (SDCE), Brussels
+ *
+ *   	Jun Sun - modified for DDB5476.
+ *
+ *  $Id: prom.c,v 1.1 2000/01/26 00:07:44 ralf Exp $
+ */
+
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/bootmem.h>
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+
+char arcs_cmdline[CL_SIZE];
+
+extern char _end;
+
+#define PFN_UP(x)	(((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
+#define PFN_ALIGN(x)	(((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
+
+
+/* [jsun@junsun.net] PMON passes arguments in C main() style */
+void __init prom_init(int argc, const char **arg)
+{
+    int i;
+    unsigned long mem_size, free_start, free_end, start_pfn, bootmap_size;
+
+    /* arg[0] is "g", the rest is boot parameters */
+    arcs_cmdline[0] = '\0';
+    for (i=1; i< argc; i++) {
+	if (strlen(arcs_cmdline) + strlen(arg[i] + 1) >= CL_SIZE) break;
+	strcat(arcs_cmdline, arg[i]);
+	strcat(arcs_cmdline, " ");
+    }
+
+    mips_machgroup = MACH_GROUP_NEC_DDB;
+    mips_machtype = MACH_NEC_DDB5476;
+    /* 64 MB non-upgradable */
+    mem_size = 64 << 20;
+
+    free_start = PHYSADDR(PFN_ALIGN(&_end));
+    free_end = mem_size;
+    start_pfn = PFN_UP((unsigned long)&_end);
+
+    /* Register all the contiguous memory with the bootmem allocator
+       and free it.  Be careful about the bootmem freemap.  */
+    bootmap_size = init_bootmem(start_pfn, mem_size >> PAGE_SHIFT);
+
+    /* Free the entire available memory after the _end symbol.  */
+    free_start += bootmap_size;
+    free_bootmem(free_start, free_end-free_start);
+}
+
+void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
+{
+}
+
+void __init prom_free_prom_memory(void)
+{
+}