83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
/*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/**
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* @file
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* @brief Basic clock, sdram and timer handling for S3C24xx CPUs
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*/
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#include <config.h>
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#include <common.h>
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#include <init.h>
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#include <clock.h>
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#include <io.h>
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#include <sizes.h>
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#include <mach/s3c-iomap.h>
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#include <mach/s3c-generic.h>
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#include <mach/s3c-busctl.h>
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#include <mach/s3c24xx-gpio.h>
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/**
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* Calculate the amount of connected and available memory
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* @return Memory size in bytes
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*/
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uint32_t s3c24xx_get_memory_size(void)
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{
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uint32_t reg, size;
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/*
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* detect the current memory size
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*/
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reg = readl(S3C_BANKSIZE);
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switch (reg & 0x7) {
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case 0:
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size = SZ_32M;
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break;
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case 1:
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size = SZ_64M;
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break;
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case 2:
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size = SZ_128M;
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break;
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case 4:
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size = SZ_2M;
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break;
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case 5:
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size = SZ_4M;
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break;
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case 6:
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size = SZ_8M;
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break;
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default:
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size = SZ_16M;
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break;
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}
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/*
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* Is bank7 also configured for SDRAM usage?
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*/
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if ((readl(S3C_BANKCON7) & (0x3 << 15)) == (0x3 << 15))
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size <<= 1; /* also count this bank */
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return size;
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}
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void s3c24xx_disable_second_sdram_bank(void)
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{
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writel(readl(S3C_BANKCON7) & ~(0x3 << 15), S3C_BANKCON7);
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writel(readl(S3C_MISCCR) | (1 << 18), S3C_MISCCR); /* disable its clock */
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}
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