From: Rob Herring <rob.herring@calxeda.com>

BugLink: http://bugs.launchpad.net/bugs/1000831

Linux runs in non-secure mode on highbank, so we need secure monitor calls
to enable and disable the PL310.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Ike Panhc <ike.pan@canonical.com>
---
arch/arm/mach-highbank/Makefile | 6 +++++-
arch/arm/mach-highbank/core.h | 1 +
arch/arm/mach-highbank/highbank.c | 15 +++++++++++++++
arch/arm/mach-highbank/smc.S | 31 +++++++++++++++++++++++++++++++
4 files changed, 52 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/mach-highbank/smc.S

diff --git a/arch/arm/mach-highbank/Makefile b/arch/arm/mach-highbank/Makefile
index a674ed3..3d4126a 100644
--- a/arch/arm/mach-highbank/Makefile
+++ b/arch/arm/mach-highbank/Makefile
@@ -1,4 +1,8 @@
-obj-y := clock.o highbank.o system.o
+obj-y := clock.o highbank.o system.o smc.o
+
+plus_sec := $(call as-instr,.arch_extension sec,+sec)
+AFLAGS_smc.o :=-Wa,-march=armv7-a$(plus_sec)
+
obj-$(CONFIG_DEBUG_HIGHBANK_UART) += lluart.o
obj-$(CONFIG_SMP) += platsmp.o
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
diff --git a/arch/arm/mach-highbank/core.h b/arch/arm/mach-highbank/core.h
index d8e2d0b..141ed51 100644
--- a/arch/arm/mach-highbank/core.h
+++ b/arch/arm/mach-highbank/core.h
@@ -8,3 +8,4 @@ extern void highbank_lluart_map_io(void);
static inline void highbank_lluart_map_io(void) {}
#endif

+extern void highbank_smc1(int fn, int arg);
diff --git a/arch/arm/mach-highbank/highbank.c b/arch/arm/mach-highbank/highbank.c
index 410a112..0ab6b34 100644
--- a/arch/arm/mach-highbank/highbank.c
+++ b/arch/arm/mach-highbank/highbank.c
@@ -85,10 +85,25 @@ const static struct of_device_id irq_match[] = {
{}
};

+#ifdef CONFIG_CACHE_L2X0
+static void highbank_l2x0_disable(void)
+{
+ /* Disable PL310 L2 Cache controller */
+ highbank_smc1(0x102, 0x0);
+}
+#endif
+
+
static void __init highbank_init_irq(void)
{
of_irq_init(irq_match);
+
+#ifdef CONFIG_CACHE_L2X0
+ /* Enable PL310 L2 Cache controller */
+ highbank_smc1(0x102, 0x1);
l2x0_of_init(0, ~0UL);
+ outer_cache.disable = highbank_l2x0_disable;
+#endif
}

static void __init highbank_timer_init(void)
diff --git a/arch/arm/mach-highbank/smc.S b/arch/arm/mach-highbank/smc.S
new file mode 100644
index 0000000..8b11632
--- /dev/null
+++ b/arch/arm/mach-highbank/smc.S
@@ -0,0 +1,31 @@
+/*
+ * Copied from omap44xx-smc.S
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ * Written by Santosh Shilimkar <santosh.shilimkar@ti.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/linkage.h>
+
+/*
+ * This is common routine to manage secure monitor API
+ * used to modify the PL310 secure registers.
+ * 'r0' contains the value to be modified and 'r12' contains
+ * the monitor API number. It uses few CPU registers
+ * internally and hence they need be backed up including
+ * link register "lr".
+ * Function signature : void omap_smc1(u32 fn, u32 arg)
+ */
+
+ENTRY(highbank_smc1)
+ stmfd sp!, {r2-r12, lr}
+ mov r12, r0
+ mov r0, r1
+ dsb
+ smc #0
+ ldmfd sp!, {r2-r12, pc}
+ENDPROC(highbank_smc1)
--
1.7.9.5


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