Initial file dump from open source releaseHEADmaster

1 files changed, 140 insertions, 0 deletions

diff --git a/arch/mips/mti-malta/malta-memory.c b/arch/mips/mti-malta/malta-memory.c
new file mode 100644
index 00000000..1f73d63e
--- /dev/null
+++ b/arch/mips/mti-malta/malta-memory.c
@@ -0,0 +1,140 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * PROM library functions for acquiring/using memory descriptors given to
+ * us from the YAMON.
+ *
+ * Copyright (C) 1999,2000,2012  MIPS Technologies, Inc.
+ * All rights reserved.
+ * Authors: Carsten Langgaard <carstenl@mips.com>
+ *          Steven J. Hill <sjhill@mips.com>
+ */
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/sections.h>
+#include <asm/fw/fw.h>
+
+static fw_memblock_t mdesc[FW_MAX_MEMBLOCKS];
+
+/* determined physical memory size, not overridden by command line args	 */
+unsigned long physical_memsize = 0L;
+
+fw_memblock_t * __init fw_getmdesc(void)
+{
+	char *memsize_str, *ptr;
+	unsigned int memsize;
+	static char cmdline[COMMAND_LINE_SIZE] __initdata;
+	long val;
+	int tmp;
+
+	/* otherwise look in the environment */
+	memsize_str = fw_getenv("memsize");
+	if (!memsize_str) {
+		pr_warn("memsize not set in YAMON, set to default (32Mb)\n");
+		physical_memsize = 0x02000000;
+	} else {
+		tmp = kstrtol(memsize_str, 0, &val);
+		physical_memsize = (unsigned long)val;
+	}
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+	/* SOC-it swaps, or perhaps doesn't swap, when DMA'ing the last
+	   word of physical memory */
+	physical_memsize -= PAGE_SIZE;
+#endif
+
+	/* Check the command line for a memsize directive that overrides
+	   the physical/default amount */
+	strcpy(cmdline, arcs_cmdline);
+	ptr = strstr(cmdline, "memsize=");
+	if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
+		ptr = strstr(ptr, " memsize=");
+
+	if (ptr)
+		memsize = memparse(ptr + 8, &ptr);
+	else
+		memsize = physical_memsize;
+
+	memset(mdesc, 0, sizeof(mdesc));
+
+	mdesc[0].type = fw_dontuse;
+	mdesc[0].base = 0x00000000;
+	mdesc[0].size = 0x00001000;
+
+	mdesc[1].type = fw_code;
+	mdesc[1].base = 0x00001000;
+	mdesc[1].size = 0x000ef000;
+
+	/*
+	 * 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 = fw_dontuse;
+	mdesc[2].base = 0x000f0000;
+	mdesc[2].size = 0x00010000;
+
+	mdesc[3].type = fw_dontuse;
+	mdesc[3].base = 0x00100000;
+	mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) -
+		mdesc[3].base;
+
+	mdesc[4].type = fw_free;
+	mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
+	mdesc[4].size = memsize - mdesc[4].base;
+
+	return &mdesc[0];
+}
+
+static int __init fw_memtype_classify(unsigned int type)
+{
+	switch (type) {
+	case fw_free:
+		return BOOT_MEM_RAM;
+	case fw_code:
+		return BOOT_MEM_ROM_DATA;
+	default:
+		return BOOT_MEM_RESERVED;
+	}
+}
+
+void __init fw_meminit(void)
+{
+	fw_memblock_t *p;
+
+	p = fw_getmdesc();
+
+	while (p->size) {
+		long type;
+		unsigned long base, size;
+
+		type = fw_memtype_classify(p->type);
+		base = p->base;
+		size = p->size;
+
+		add_memory_region(base, size, type);
+		p++;
+	}
+}
+
+void __init prom_free_prom_memory(void)
+{
+	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;
+		free_init_pages("YAMON memory",
+				addr, addr + boot_mem_map.map[i].size);
+	}
+}