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author | Florian Fainelli <florian@openwrt.org> | 2009-06-24 11:12:57 +0200 |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2009-07-03 15:45:23 +0100 |
commit | 7ca5dc145bc7daddd8aed8bbda46b74af9cebefc (patch) | |
tree | 130b1aac6b095bdc2638124169795d6857981c31 /arch/mips/ar7/memory.c | |
parent | 7c5371c403abb29f01bc6cff6c5096abdf2dc524 (diff) | |
download | linux-stable-7ca5dc145bc7daddd8aed8bbda46b74af9cebefc.tar.gz linux-stable-7ca5dc145bc7daddd8aed8bbda46b74af9cebefc.tar.bz2 linux-stable-7ca5dc145bc7daddd8aed8bbda46b74af9cebefc.zip |
MIPS: Add support for Texas Instruments AR7 System-on-a-Chip
This patch adds support for the Texas Instruments AR7 System-on-a-Chip.
It supports the TNETD7100, 7200 and 7300 versions of the SoC.
Signed-off-by: Matteo Croce <matteo@openwrt.org>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Eugene Konev <ejka@openwrt.org>
Signed-off-by: Nicolas Thill <nico@openwrt.org>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/ar7/memory.c')
-rw-r--r-- | arch/mips/ar7/memory.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/mips/ar7/memory.c b/arch/mips/ar7/memory.c new file mode 100644 index 000000000000..46fed44825a6 --- /dev/null +++ b/arch/mips/ar7/memory.c @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include <linux/bootmem.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/pfn.h> +#include <linux/proc_fs.h> +#include <linux/string.h> +#include <linux/swap.h> + +#include <asm/bootinfo.h> +#include <asm/page.h> +#include <asm/sections.h> + +#include <asm/mach-ar7/ar7.h> +#include <asm/mips-boards/prom.h> + +static int __init memsize(void) +{ + u32 size = (64 << 20); + u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4); + u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end)); + u32 *tmpaddr = addr; + + while (tmpaddr > kernel_end) { + *tmpaddr = (u32)tmpaddr; + size >>= 1; + tmpaddr -= size >> 2; + } + + do { + tmpaddr += size >> 2; + if (*tmpaddr != (u32)tmpaddr) + break; + size <<= 1; + } while (size < (64 << 20)); + + writel(tmpaddr, &addr); + + return size; +} + +void __init prom_meminit(void) +{ + unsigned long pages; + + pages = memsize() >> PAGE_SHIFT; + add_memory_region(PHYS_OFFSET, pages << PAGE_SHIFT, + BOOT_MEM_RAM); +} + +void __init prom_free_prom_memory(void) +{ + /* Nothing to free */ +} |