mirror of https://gitee.com/openkylin/linux.git
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
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/*
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* arch/ppc/syslib/ibm440sp_common.c
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*
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* PPC440SP system library
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*
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* Matt Porter <mporter@kernel.crashing.org>
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* Copyright 2002-2005 MontaVista Software Inc.
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*
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* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
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* Copyright (c) 2003, 2004 Zultys Technologies
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/serial.h>
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#include <asm/param.h>
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#include <asm/ibm44x.h>
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#include <asm/mmu.h>
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#include <asm/machdep.h>
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#include <asm/time.h>
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#include <asm/ppc4xx_pic.h>
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/*
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* Read the 440SP memory controller to get size of system memory.
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*/
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unsigned long __init ibm440sp_find_end_of_memory(void)
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{
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u32 i;
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u32 mem_size = 0;
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/* Read two bank sizes and sum */
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for (i=0; i<2; i++)
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switch (mfdcr(DCRN_MQ0_BS0BAS + i) & MQ0_CONFIG_SIZE_MASK) {
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case MQ0_CONFIG_SIZE_8M:
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mem_size += PPC44x_MEM_SIZE_8M;
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break;
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case MQ0_CONFIG_SIZE_16M:
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mem_size += PPC44x_MEM_SIZE_16M;
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break;
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case MQ0_CONFIG_SIZE_32M:
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mem_size += PPC44x_MEM_SIZE_32M;
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break;
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case MQ0_CONFIG_SIZE_64M:
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mem_size += PPC44x_MEM_SIZE_64M;
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break;
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case MQ0_CONFIG_SIZE_128M:
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mem_size += PPC44x_MEM_SIZE_128M;
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break;
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case MQ0_CONFIG_SIZE_256M:
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mem_size += PPC44x_MEM_SIZE_256M;
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break;
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case MQ0_CONFIG_SIZE_512M:
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mem_size += PPC44x_MEM_SIZE_512M;
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break;
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case MQ0_CONFIG_SIZE_1G:
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mem_size += PPC44x_MEM_SIZE_1G;
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break;
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case MQ0_CONFIG_SIZE_2G:
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mem_size += PPC44x_MEM_SIZE_2G;
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break;
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default:
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break;
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}
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return mem_size;
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}
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