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authorRalf Baechle <ralf@linux-mips.org>2008-07-15 18:44:34 +0100
committerRalf Baechle <ralf@linux-mips.org>2008-07-15 18:44:34 +0100
commit315806cb19f9d375dccbc2d60fa14e16afdcd5ac (patch)
treeeffe89f2f8d49bf62018ad5717a0d7c8c5725277 /arch/mips/mti-malta/malta-memory.c
parenteda49eeebf263f3a34f6968959fc2e4825b42beb (diff)
downloadlinux-stericsson-315806cb19f9d375dccbc2d60fa14e16afdcd5ac.tar.gz
[MIPS] Malta: Cleanup organization of code into directories.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mti-malta/malta-memory.c')
-rw-r--r--arch/mips/mti-malta/malta-memory.c177
1 files changed, 177 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 000000000000..61888ff72c87
--- /dev/null
+++ b/arch/mips/mti-malta/malta-memory.c
@@ -0,0 +1,177 @@
+/*
+ * 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/init.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/pfn.h>
+#include <linux/string.h>
+
+#include <asm/bootinfo.h>
+#include <asm/page.h>
+#include <asm/sections.h>
+
+#include <asm/mips-boards/prom.h>
+
+/*#define DEBUG*/
+
+enum yamon_memtypes {
+ yamon_dontuse,
+ yamon_prom,
+ yamon_free,
+};
+static struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
+
+#ifdef DEBUG
+static char *mtypes[3] = {
+ "Dont use memory",
+ "YAMON PROM memory",
+ "Free memmory",
+};
+#endif
+
+/* determined physical memory size, not overridden by command line args */
+unsigned long physical_memsize = 0L;
+
+static struct prom_pmemblock * __init prom_getmdesc(void)
+{
+ char *memsize_str;
+ unsigned int memsize;
+ char cmdline[CL_SIZE], *ptr;
+
+ /* otherwise look in the environment */
+ memsize_str = prom_getenv("memsize");
+ if (!memsize_str) {
+ printk(KERN_WARNING
+ "memsize not set in boot prom, set to default (32Mb)\n");
+ physical_memsize = 0x02000000;
+ } else {
+#ifdef DEBUG
+ pr_debug("prom_memsize = %s\n", memsize_str);
+#endif
+ physical_memsize = simple_strtol(memsize_str, NULL, 0);
+ }
+
+#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 = yamon_dontuse;
+ mdesc[0].base = 0x00000000;
+ mdesc[0].size = 0x00001000;
+
+ mdesc[1].type = yamon_prom;
+ 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 = yamon_dontuse;
+ mdesc[2].base = 0x000f0000;
+ mdesc[2].size = 0x00010000;
+
+ mdesc[3].type = yamon_dontuse;
+ mdesc[3].base = 0x00100000;
+ mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_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
+ pr_debug("YAMON MEMORY DESCRIPTOR dump:\n");
+ p = prom_getmdesc();
+ while (p->size) {
+ int i = 0;
+ pr_debug("[%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++;
+ }
+}
+
+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("prom memory",
+ addr, addr + boot_mem_map.map[i].size);
+ }
+}