From: Arnd Bergmann <arnd@arndb.de>
Date: Sat, 8 Oct 2011 19:47:06 +0000 (+0200)
Subject: Merge branch 'stericsson/fixes' into next/cleanup
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a3849a4c038a21075a0bc7eaf37f65a93976d10c;p=mv-sheeva.git

Merge branch 'stericsson/fixes' into next/cleanup

Conflicts:
	arch/arm/mach-ux500/cpu.c
---

a3849a4c038a21075a0bc7eaf37f65a93976d10c
diff --cc arch/arm/mach-ux500/cache-l2x0.c
index 9d09e4d013b,00000000000..122ddde00ba
mode 100644,000000..100644
--- a/arch/arm/mach-ux500/cache-l2x0.c
+++ b/arch/arm/mach-ux500/cache-l2x0.c
@@@ -1,72 -1,0 +1,95 @@@
 +/*
 + * Copyright (C) ST-Ericsson SA 2011
 + *
 + * License terms: GNU General Public License (GPL) version 2
 + */
 +
 +#include <linux/io.h>
 +#include <asm/cacheflush.h>
 +#include <asm/hardware/cache-l2x0.h>
 +#include <mach/hardware.h>
 +#include <mach/id.h>
 +
 +static void __iomem *l2x0_base;
 +
 +static inline void ux500_cache_wait(void __iomem *reg, unsigned long mask)
 +{
 +	/* wait for the operation to complete */
 +	while (readl_relaxed(reg) & mask)
 +		cpu_relax();
 +}
 +
 +static inline void ux500_cache_sync(void)
 +{
 +	writel_relaxed(0, l2x0_base + L2X0_CACHE_SYNC);
 +	ux500_cache_wait(l2x0_base + L2X0_CACHE_SYNC, 1);
 +}
 +
 +/*
 + * The L2 cache cannot be turned off in the non-secure world.
 + * Dummy until a secure service is in place.
 + */
 +static void ux500_l2x0_disable(void)
 +{
 +}
 +
 +/*
 + * This is only called when doing a kexec, just after turning off the L2
 + * and L1 cache, and it is surrounded by a spinlock in the generic version.
 + * However, we're not really turning off the L2 cache right now and the
 + * PL310 does not support exclusive accesses (used to implement the spinlock).
 + * So, the invalidation needs to be done without the spinlock.
 + */
 +static void ux500_l2x0_inv_all(void)
 +{
 +	uint32_t l2x0_way_mask = (1<<16) - 1;	/* Bitmask of active ways */
 +
 +	/* invalidate all ways */
 +	writel_relaxed(l2x0_way_mask, l2x0_base + L2X0_INV_WAY);
 +	ux500_cache_wait(l2x0_base + L2X0_INV_WAY, l2x0_way_mask);
 +	ux500_cache_sync();
 +}
 +
- static int ux500_l2x0_init(void)
++static int __init ux500_l2x0_unlock(void)
++{
++	int i;
++
++	/*
++	 * Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
++	 * apparently locks both caches before jumping to the kernel. The
++	 * l2x0 core will not touch the unlock registers if the l2x0 is
++	 * already enabled, so we do it right here instead. The PL310 has
++	 * 8 sets of registers, one per possible CPU.
++	 */
++	for (i = 0; i < 8; i++) {
++		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
++			       i * L2X0_LOCKDOWN_STRIDE);
++		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
++			       i * L2X0_LOCKDOWN_STRIDE);
++	}
++	return 0;
++}
++
++static int __init ux500_l2x0_init(void)
 +{
 +	if (cpu_is_u5500())
 +		l2x0_base = __io_address(U5500_L2CC_BASE);
 +	else if (cpu_is_u8500())
 +		l2x0_base = __io_address(U8500_L2CC_BASE);
 +	else
 +		ux500_unknown_soc();
 +
++	/* Unlock before init */
++	ux500_l2x0_unlock();
++
 +	/* 64KB way size, 8 way associativity, force WA */
 +	l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff);
 +
 +	/* Override invalidate function */
 +	outer_cache.disable = ux500_l2x0_disable;
 +	outer_cache.inv_all = ux500_l2x0_inv_all;
 +
 +	return 0;
 +}
 +
 +early_initcall(ux500_l2x0_init);