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68 lines
2.0 KiB
C
68 lines
2.0 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright MontaVista Software Inc
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* Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved.
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* Copyright (C) 2006 FON Technology, SL.
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* Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
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*/
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/*
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* Prom setup file for ar531x
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*/
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#include <linux/init.h>
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#include <linux/autoconf.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/bootmem.h>
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#include <asm/bootinfo.h>
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#include <asm/addrspace.h>
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#include "ar531x.h"
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void __init prom_init(void)
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{
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u32 memsize, memcfg;
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mips_machgroup = MACH_GROUP_ATHEROS;
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mips_machtype = -1;
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/*
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* Atheros CPUs before the AR2315 are using MIPS 4Kc core, later designs are
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* using MIPS 4KEc R2 core. This makes it easy to determine the board at runtime.
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*/
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if (current_cpu_data.cputype == CPU_4KEC) {
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mips_machtype = MACH_ATHEROS_AR5315;
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memcfg = sysRegRead(AR5315_MEM_CFG);
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memsize = 1 + ((memcfg & SDRAM_DATA_WIDTH_M) >> SDRAM_DATA_WIDTH_S);
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memsize <<= 1 + ((memcfg & SDRAM_COL_WIDTH_M) >> SDRAM_COL_WIDTH_S);
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memsize <<= 1 + ((memcfg & SDRAM_ROW_WIDTH_M) >> SDRAM_ROW_WIDTH_S);
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memsize <<= 3;
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} else {
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int bank0AC, bank1AC;
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mips_machtype = MACH_ATHEROS_AR5312;
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memcfg = sysRegRead(AR531X_MEM_CFG1);
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bank0AC = (memcfg & MEM_CFG1_AC0) >> MEM_CFG1_AC0_S;
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bank1AC = (memcfg & MEM_CFG1_AC1) >> MEM_CFG1_AC1_S;
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memsize = (bank0AC ? (1 << (bank0AC+1)) : 0)
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+ (bank1AC ? (1 << (bank1AC+1)) : 0);
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memsize <<= 20;
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}
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add_memory_region(0, memsize, BOOT_MEM_RAM);
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strcpy(arcs_cmdline, "console=ttyS0,9600 rootfstype=squashfs,jffs2");
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}
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void __init prom_free_prom_memory(void)
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{
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}
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