Add preliminary RouterBoard RB1xx support

SVN-Revision: 6839

1 files changed, 135 insertions, 0 deletions

diff --git a/target/linux/rb1xx-2.6/files/arch/mips/adm5120/memory.c b/target/linux/rb1xx-2.6/files/arch/mips/adm5120/memory.c
new file mode 100644
index 0000000..e5c7f0c
--- /dev/null
+++ b/target/linux/rb1xx-2.6/files/arch/mips/adm5120/memory.c
@@ -0,0 +1,135 @@
+/*****************************************************************************
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
+ * Copyright (C) 2003 ADMtek Incorporated.
+ *	daniell@admtek.com.tw
+ * Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
+ *
+ * ########################################################################
+ *
+ *  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/autoconf.h>
+#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/mips-boards/prom.h>
+
+extern char *prom_getenv(char *envname);
+
+#define PFN_ALIGN(x)    (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
+
+#define ADM5120_MEMCTRL			0x1200001c
+#define ADM5120_MEMCTRL_SDRAM_MASK	0x7
+
+static const unsigned long adm_sdramsize[] __initdata = {
+	0x0,		/* Reserved */
+	0x0400000,	/* 4Mb */
+	0x0800000,	/* 8Mb */
+	0x1000000,	/* 16Mb */
+	0x4000000,	/* 64Mb */
+	0x8000000,	/* 128Mb */
+};
+
+/* determined physical memory size, not overridden by command line args  */
+unsigned long physical_memsize = 0L;
+
+struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
+
+struct prom_pmemblock * __init prom_getmdesc(void)
+{
+	char *memsize_str;
+	unsigned int memsize;
+	char cmdline[CL_SIZE], *ptr;
+
+	memsize_str = prom_getenv("memsize");
+
+	if (!memsize_str)
+	{
+		prom_printf("memsize not set in boot prom, set to default (8Mb)\n");
+		physical_memsize = 0x00800000;
+	}
+	else
+#ifdef DEBUG
+		prom_printf("prom_memsize = %s\n", memsize_str);
+#endif
+		physical_memsize = simple_strtol(memsize_str, NULL, 0);
+
+	/* 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 = BOOT_MEM_RAM;
+       mdesc[0].base = CPHYSADDR(PFN_ALIGN(&_end));
+       mdesc[0].size = memsize - mdesc[0].base;
+
+       return &mdesc[0];
+}
+
+void __init prom_meminit(void)
+{
+	struct prom_pmemblock *p;
+
+	p = prom_getmdesc();
+
+	while (p->size)
+	{
+		long type;
+		unsigned long base, size;
+		base = p->base;
+		type = p->type,
+		size = p->size;
+		add_memory_region(base, size, type);
+		p++;
+	}
+}
+
+#if 0
+void __init prom_meminit(void)
+{
+	unsigned long base = CPHYSADDR(PFN_ALIGN(&_end));
+	unsigned long size;
+
+	u32 memctrl = *(u32*)KSEG1ADDR(ADM5120_MEMCTRL);
+	size = adm_sdramsize[memctrl & ADM5120_MEMCTRL_SDRAM_MASK];
+	add_memory_region(base, size-base, BOOT_MEM_RAM);
+}
+#endif
+
+unsigned long __init prom_free_prom_memory(void)
+{
+	/* We do not have to prom memory to free */
+        return 0;
+}