Initial file dump from open source releaseHEADmaster

1 files changed, 75 insertions, 0 deletions

diff --git a/arch/arm/mach-ux500/cache-l2x0.c b/arch/arm/mach-ux500/cache-l2x0.c
new file mode 100644
index 00000000..f58615b5
--- /dev/null
+++ b/arch/arm/mach-ux500/cache-l2x0.c
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/io.h>
+#include <linux/of.h>
+
+#include <asm/cacheflush.h>
+#include <asm/hardware/cache-l2x0.h>
+
+#include "db8500-regs.h"
+#include "id.h"
+
+static void __iomem *l2x0_base;
+
+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)
+{
+	u32 aux_val = 0x3e000000;
+
+	if (cpu_is_u8500_family() || cpu_is_ux540_family())
+		l2x0_base = __io_address(U8500_L2CC_BASE);
+	else
+		ux500_unknown_soc();
+
+	/* Unlock before init */
+	ux500_l2x0_unlock();
+
+	/* DBx540's L2 has 128KB way size */
+	if (cpu_is_ux540_family())
+		/* 128KB way size */
+		aux_val |= (0x4 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT);
+	else
+		/* 64KB way size */
+		aux_val |= (0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT);
+
+	/* 64KB way size, 8 way associativity, force WA */
+	if (of_have_populated_dt())
+		l2x0_of_init(aux_val, 0xc0000fff);
+	else
+		l2x0_init(l2x0_base, aux_val, 0xc0000fff);
+
+	/*
+	 * We can't disable l2 as we are in non secure mode, currently
+	 * this seems be called only during kexec path. So let's
+	 * override outer.disable with nasty assignment until we have
+	 * some SMI service available.
+	 */
+	outer_cache.disable = NULL;
+
+	return 0;
+}
+
+early_initcall(ux500_l2x0_init);