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/*
* OMAP SRAM detection and management
*
* Copyright (C) 2005 Nokia Corporation
* Written by Tony Lindgren <tony@atomide.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/fncpy.h>
#include <asm/tlb.h>
#include <asm/cacheflush.h>
#include <asm/mach/map.h>
#include "soc.h"
#include "sram.h"
#define OMAP1_SRAM_PA 0x20000000
#define SRAM_BOOTLOADER_SZ 0x80
/*
* The amount of SRAM depends on the core type.
* Note that we cannot try to test for SRAM here because writes
* to secure SRAM will hang the system. Also the SRAM is not
* yet mapped at this point.
*/
static void __init omap_detect_and_map_sram(void)
{
unsigned long omap_sram_skip = SRAM_BOOTLOADER_SZ;
unsigned long omap_sram_start = OMAP1_SRAM_PA;
unsigned long omap_sram_size;
if (cpu_is_omap7xx())
omap_sram_size = 0x32000; /* 200K */
else if (cpu_is_omap15xx())
omap_sram_size = 0x30000; /* 192K */
else if (cpu_is_omap1610() || cpu_is_omap1611() ||
cpu_is_omap1621() || cpu_is_omap1710())
omap_sram_size = 0x4000; /* 16K */
else {
pr_err("Could not detect SRAM size\n");
omap_sram_size = 0x4000;
}
omap_map_sram(omap_sram_start, omap_sram_size,
omap_sram_skip, 1);
}
static void (*_omap_sram_reprogram_clock)(u32 dpllctl, u32 ckctl);
void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl)
{
BUG_ON(!_omap_sram_reprogram_clock);
/* On 730, bit 13 must always be 1 */
if (cpu_is_omap7xx())
ckctl |= 0x2000;
_omap_sram_reprogram_clock(dpllctl, ckctl);
}
int __init omap_sram_init(void)
{
omap_detect_and_map_sram();
_omap_sram_reprogram_clock =
omap_sram_push(omap1_sram_reprogram_clock,
omap1_sram_reprogram_clock_sz);
return 0;
}
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