Merge tag 'firmware-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM platform specific firmware interfaces from Olof Johansson:
 "Two platforms, bcm and exynos have their own firmware interfaces using
  the "secure monitor call", this adds support for those.

  We had originally planned to have a third set of patches in here,
  which would extend support for the existing generic "psci" call that
  is used on multiple platforms as well as Xen and KVM guests, but that
  ended up getting dropped because the patches were not ready in time."

* tag 'firmware-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: bcm: mark bcm_kona_smc_init as __init
  ARM: bcm281xx: Add DT support for SMC handler
  ARM: bcm281xx: Add L2 cache enable code
  ARM: EXYNOS: Add secure firmware support to secondary CPU bring-up
  ARM: EXYNOS: Add IO mapping for non-secure SYSRAM.
  ARM: EXYNOS: Add support for Exynos secure firmware
  ARM: EXYNOS: Add support for secure monitor calls
  ARM: Add interface for registering and calling firmware-specific operations

1 files changed, 118 insertions, 0 deletions

diff --git a/arch/arm/mach-bcm/bcm_kona_smc.c b/arch/arm/mach-bcm/bcm_kona_smc.c
new file mode 100644
index 0000000..56d9d19
--- /dev/null
+++ b/arch/arm/mach-bcm/bcm_kona_smc.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2013 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <stdarg.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+
+#include <asm/cacheflush.h>
+#include <linux/of_address.h>
+
+#include "bcm_kona_smc.h"
+
+struct secure_bridge_data {
+	void __iomem *bounce;		/* virtual address */
+	u32 __iomem buffer_addr;	/* physical address */
+	int initialized;
+} bridge_data;
+
+struct bcm_kona_smc_data {
+	unsigned service_id;
+	unsigned arg0;
+	unsigned arg1;
+	unsigned arg2;
+	unsigned arg3;
+};
+
+static const struct of_device_id bcm_kona_smc_ids[] __initconst = {
+	{.compatible = "bcm,kona-smc"},
+	{},
+};
+
+/* Map in the bounce area */
+void __init bcm_kona_smc_init(void)
+{
+	struct device_node *node;
+
+	/* Read buffer addr and size from the device tree node */
+	node = of_find_matching_node(NULL, bcm_kona_smc_ids);
+	BUG_ON(!node);
+
+	/* Don't care about size or flags of the DT node */
+	bridge_data.buffer_addr =
+		be32_to_cpu(*of_get_address(node, 0, NULL, NULL));
+	BUG_ON(!bridge_data.buffer_addr);
+
+	bridge_data.bounce = of_iomap(node, 0);
+	BUG_ON(!bridge_data.bounce);
+
+	bridge_data.initialized = 1;
+
+	pr_info("Secure API initialized!\n");
+}
+
+/* __bcm_kona_smc() should only run on CPU 0, with pre-emption disabled */
+static void __bcm_kona_smc(void *info)
+{
+	struct bcm_kona_smc_data *data = info;
+	u32 *args = bridge_data.bounce;
+	int rc = 0;
+
+	/* Must run on CPU 0 */
+	BUG_ON(smp_processor_id() != 0);
+
+	/* Check map in the bounce area */
+	BUG_ON(!bridge_data.initialized);
+
+	/* Copy one 32 bit word into the bounce area */
+	args[0] = data->arg0;
+	args[1] = data->arg1;
+	args[2] = data->arg2;
+	args[3] = data->arg3;
+
+	/* Flush caches for input data passed to Secure Monitor */
+	if (data->service_id != SSAPI_BRCM_START_VC_CORE)
+		flush_cache_all();
+
+	/* Trap into Secure Monitor */
+	rc = bcm_kona_smc_asm(data->service_id, bridge_data.buffer_addr);
+
+	if (rc != SEC_ROM_RET_OK)
+		pr_err("Secure Monitor call failed (0x%x)!\n", rc);
+}
+
+unsigned bcm_kona_smc(unsigned service_id, unsigned arg0, unsigned arg1,
+		  unsigned arg2, unsigned arg3)
+{
+	struct bcm_kona_smc_data data;
+
+	data.service_id = service_id;
+	data.arg0 = arg0;
+	data.arg1 = arg1;
+	data.arg2 = arg2;
+	data.arg3 = arg3;
+
+	/*
+	 * Due to a limitation of the secure monitor, we must use the SMP
+	 * infrastructure to forward all secure monitor calls to Core 0.
+	 */
+	if (get_cpu() != 0)
+		smp_call_function_single(0, __bcm_kona_smc, (void *)&data, 1);
+	else
+		__bcm_kona_smc(&data);
+
+	put_cpu();
+
+	return 0;
+}