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, 41 insertions, 0 deletions

diff --git a/arch/arm/mach-bcm/bcm_kona_smc_asm.S b/arch/arm/mach-bcm/bcm_kona_smc_asm.S
new file mode 100644
index 000000000000..a1608480d60d
--- /dev/null
+++ b/arch/arm/mach-bcm/bcm_kona_smc_asm.S
@@ -0,0 +1,41 @@
+/*
+ * 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 <linux/linkage.h>
+#include "bcm_kona_smc.h"
+
+/*
+ * int bcm_kona_smc_asm(u32 service_id, u32 buffer_addr)
+ */
+
+ENTRY(bcm_kona_smc_asm)
+	stmfd	sp!, {r4-r12, lr}
+	mov	r4, r0		@ service_id
+	mov	r5, #3		@ Keep IRQ and FIQ off in SM
+	/*
+	 * Since interrupts are disabled in the open mode, we must keep
+	 * interrupts disabled in secure mode by setting R5=0x3. If interrupts
+	 * are enabled in open mode, we can set R5=0x0 to allow interrupts in
+	 * secure mode.  If we did this, the secure monitor would return back
+	 * control to the open mode to handle the interrupt prior to completing
+	 * the secure service. If this happened, R12 would not be
+	 * SEC_EXIT_NORMAL and we would need to call SMC again after resetting
+	 * R5 (it gets clobbered by the secure monitor) and setting R4 to
+	 * SSAPI_RET_FROM_INT_SERV to indicate that we want the secure monitor
+	 * to finish up the previous uncompleted secure service.
+	 */
+	mov	r6, r1		@ buffer_addr
+	smc	#0
+	/* Check r12 for SEC_EXIT_NORMAL here if interrupts are enabled */
+	ldmfd	sp!, {r4-r12, pc}
+ENDPROC(bcm_kona_smc_asm)