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/*
* Copyright (C) 2009-2010 Pengutronix
* Sascha Hauer <s.hauer@pengutronix.de>
* Juergen Beisert <j.beisert@pengutronix.de>
*
* 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/init.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <asm/hardware/cache-l2x0.h>
#include <mach/hardware.h>
static int mxc_init_l2x0(void)
{
void __iomem *l2x0_base;
void __iomem *clkctl_base;
if (!cpu_is_mx31() && !cpu_is_mx35())
return 0;
/*
* First of all, we must repair broken chip settings. There are some
* i.MX35 CPUs in the wild, comming with bogus L2 cache settings. These
* misconfigured CPUs will run amok immediately when the L2 cache gets enabled.
* Workaraound is to setup the correct register setting prior enabling the
* L2 cache. This should not hurt already working CPUs, as they are using the
* same value.
*/
#define L2_MEM_VAL 0x10
clkctl_base = ioremap(MX35_CLKCTL_BASE_ADDR, 4096);
if (clkctl_base != NULL) {
writel(0x00000515, clkctl_base + L2_MEM_VAL);
iounmap(clkctl_base);
} else {
pr_err("L2 cache: Cannot fix timing. Trying to continue without\n");
}
l2x0_base = ioremap(MX3x_L2CC_BASE_ADDR, 4096);
if (IS_ERR(l2x0_base)) {
printk(KERN_ERR "remapping L2 cache area failed with %ld\n",
PTR_ERR(l2x0_base));
return 0;
}
l2x0_init(l2x0_base, 0x00030024, 0x00000000);
return 0;
}
early_initcall(mxc_init_l2x0);
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