Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 173 insertions, 0 deletions

diff --git a/arch/mips/mips-boards/generic/memory.c b/arch/mips/mips-boards/generic/memory.c
new file mode 100644
index 00000000000..5ae2b43e4c2
--- /dev/null
+++ b/arch/mips/mips-boards/generic/memory.c
@@ -0,0 +1,173 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 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.
+ *
+ * PROM library functions for acquiring/using memory descriptors given to
+ * us from the YAMON.
+ */
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+
+#include <asm/mips-boards/prom.h>
+
+/*#define DEBUG*/
+
+enum yamon_memtypes {
+	yamon_dontuse,
+	yamon_prom,
+	yamon_free,
+};
+struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
+
+#ifdef DEBUG
+static char *mtypes[3] = {
+	"Dont use memory",
+	"YAMON PROM memory",
+	"Free memmory",
+};
+#endif
+
+/* References to section boundaries */
+extern char _end;
+
+#define PFN_ALIGN(x)    (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
+
+
+struct prom_pmemblock * __init prom_getmdesc(void)
+{
+	char *memsize_str;
+	unsigned int memsize;
+
+	memsize_str = prom_getenv("memsize");
+	if (!memsize_str) {
+		prom_printf("memsize not set in boot prom, set to default (32Mb)\n");
+		memsize = 0x02000000;
+	} else {
+#ifdef DEBUG
+		prom_printf("prom_memsize = %s\n", memsize_str);
+#endif
+		memsize = simple_strtol(memsize_str, NULL, 0);
+	}
+
+	memset(mdesc, 0, sizeof(mdesc));
+
+	mdesc[0].type = yamon_dontuse;
+	mdesc[0].base = 0x00000000;
+	mdesc[0].size = 0x00001000;
+
+	mdesc[1].type = yamon_prom;
+	mdesc[1].base = 0x00001000;
+	mdesc[1].size = 0x000ef000;
+
+#ifdef CONFIG_MIPS_MALTA
+	/*
+	 * The area 0x000f0000-0x000fffff is allocated for BIOS memory by the
+	 * south bridge and PCI access always forwarded to the ISA Bus and
+	 * BIOSCS# is always generated.
+	 * This mean that this area can't be used as DMA memory for PCI
+	 * devices.
+	 */
+	mdesc[2].type = yamon_dontuse;
+	mdesc[2].base = 0x000f0000;
+	mdesc[2].size = 0x00010000;
+#else
+	mdesc[2].type = yamon_prom;
+	mdesc[2].base = 0x000f0000;
+	mdesc[2].size = 0x00010000;
+#endif
+
+	mdesc[3].type = yamon_dontuse;
+	mdesc[3].base = 0x00100000;
+	mdesc[3].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[3].base;
+
+	mdesc[4].type = yamon_free;
+	mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
+	mdesc[4].size = memsize - mdesc[4].base;
+
+	return &mdesc[0];
+}
+
+static int __init prom_memtype_classify (unsigned int type)
+{
+	switch (type) {
+	case yamon_free:
+		return BOOT_MEM_RAM;
+	case yamon_prom:
+		return BOOT_MEM_ROM_DATA;
+	default:
+		return BOOT_MEM_RESERVED;
+	}
+}
+
+void __init prom_meminit(void)
+{
+	struct prom_pmemblock *p;
+
+#ifdef DEBUG
+	prom_printf("YAMON MEMORY DESCRIPTOR dump:\n");
+	p = prom_getmdesc();
+	while (p->size) {
+		int i = 0;
+		prom_printf("[%d,%p]: base<%08lx> size<%08lx> type<%s>\n",
+			    i, p, p->base, p->size, mtypes[p->type]);
+		p++;
+		i++;
+	}
+#endif
+	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++;
+	}
+}
+
+unsigned long __init prom_free_prom_memory(void)
+{
+	unsigned long freed = 0;
+	unsigned long addr;
+	int i;
+
+	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;
+		while (addr < boot_mem_map.map[i].addr
+			      + boot_mem_map.map[i].size) {
+			ClearPageReserved(virt_to_page(__va(addr)));
+			set_page_count(virt_to_page(__va(addr)), 1);
+			free_page((unsigned long)__va(addr));
+			addr += PAGE_SIZE;
+			freed += PAGE_SIZE;
+		}
+	}
+	printk("Freeing prom memory: %ldkb freed\n", freed >> 10);
+
+	return freed;
+}