diff options
author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2011-03-17 09:40:29 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-05-19 13:11:38 +0200 |
commit | 27ad4bf72a27c80c121b2349174e6b41b2e3afd8 (patch) | |
tree | 864ddd4e58386f22c9fda4457ebc5bb23d790792 /arch/arm/mach-imx/cache-l2x0.c | |
parent | 7fc92c6092d7208e53d35cda32a9181aae396adf (diff) |
ARM: imx: move mx3 support to mach-imx
Fixing a few "please, no space before tabs" and "empty line at end of
file" warnings on the way.
LAKML-Reference: 1299271882-2130-6-git-send-email-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-imx/cache-l2x0.c')
-rw-r--r-- | arch/arm/mach-imx/cache-l2x0.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/cache-l2x0.c b/arch/arm/mach-imx/cache-l2x0.c new file mode 100644 index 000000000000..69d1322add3c --- /dev/null +++ b/arch/arm/mach-imx/cache-l2x0.c @@ -0,0 +1,56 @@ +/* + * 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; +} +arch_initcall(mxc_init_l2x0); |