[MIPS] MIPSsim: Move code away from the other MIPS Inc. BSP code.

It shares no code at all.  While at it also fix up the beginning bitrot.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/mipssim/sim_mem.c

@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2005 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope 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/mm.h>
+#include <linux/bootmem.h>
+#include <linux/pfn.h>
+
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+#include <asm/sections.h>
+
+#include <asm/mips-boards/prom.h>
+
+/*#define DEBUG*/
+
+enum simmem_memtypes {
+	simmem_reserved = 0,
+	simmem_free,
+};
+struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
+
+#ifdef DEBUG
+static char *mtypes[3] = {
+	"SIM reserved memory",
+	"SIM free memory",
+};
+#endif
+
+struct prom_pmemblock * __init prom_getmdesc(void)
+{
+	unsigned int memsize;
+
+	memsize = 0x02000000;
+	pr_info("Setting default memory size 0x%08x\n", memsize);
+
+	memset(mdesc, 0, sizeof(mdesc));
+
+	mdesc[0].type = simmem_reserved;
+	mdesc[0].base = 0x00000000;
+	mdesc[0].size = 0x00001000;
+
+	mdesc[1].type = simmem_free;
+	mdesc[1].base = 0x00001000;
+	mdesc[1].size = 0x000ff000;
+
+	mdesc[2].type = simmem_reserved;
+	mdesc[2].base = 0x00100000;
+	mdesc[2].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[2].base;
+
+	mdesc[3].type = simmem_free;
+	mdesc[3].base = CPHYSADDR(PFN_ALIGN(&_end));
+	mdesc[3].size = memsize - mdesc[3].base;
+
+	return &mdesc[0];
+}
+
+static int __init prom_memtype_classify (unsigned int type)
+{
+	switch (type) {
+	case simmem_free:
+		return BOOT_MEM_RAM;
+	case simmem_reserved:
+	default:
+		return BOOT_MEM_RESERVED;
+	}
+}
+
+void __init prom_meminit(void)
+{
+	struct prom_pmemblock *p;
+
+	p = prom_getmdesc();
+
+	while (p->size) {
+		long type;
+		unsigned long base, size;
+
+		type = prom_memtype_classify (p->type);
+		base = p->base;
+		size = p->size;
+
+		add_memory_region(base, size, type);
+		p++;
+	}
+}
+
+void __init prom_free_prom_memory(void)
+{
+	int i;
+	unsigned long addr;
+
+	for (i = 0; i < boot_mem_map.nr_map; i++) {
+		if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
+			continue;
+
+		addr = boot_mem_map.map[i].addr;
+		free_init_pages("prom memory",
+				addr, addr + boot_mem_map.map[i].size);
+	}
+}