1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/gpu/arm/midgard/mali_kbase_smc.c b/drivers/gpu/arm/midgard/mali_kbase_smc.c
new file mode 100644
index 000000000000..aa2da3ab7e98
--- /dev/null
+++ b/drivers/gpu/arm/midgard/mali_kbase_smc.c
@@ -0,0 +1,77 @@
+/*
+ *
+ * (C) COPYRIGHT 2015 ARM Limited. All rights reserved.
+ *
+ * This program is free software and is provided to you under the terms of the
+ * GNU General Public License version 2 as published by the Free Software
+ * Foundation, and any use by you of this program is subject to the terms
+ * of such GNU licence.
+ *
+ * A copy of the licence is included with the program, and can also be obtained
+ * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301, USA.
+ *
+ */
+
+
+
+#ifdef CONFIG_ARM64
+
+#include <mali_kbase.h>
+#include <mali_kbase_smc.h>
+
+
+static noinline u32 invoke_smc_fid(u32 function_id, u64 arg0, u64 arg1,
+		u64 arg2, u64 *res0, u64 *res1, u64 *res2)
+{
+	/* 3 args and 3 returns are chosen arbitrarily,
+	   see SMC calling convention for limits */
+	asm volatile(
+			"mov x0, %[fid]\n"
+			"mov x1, %[a0]\n"
+			"mov x2, %[a1]\n"
+			"mov x3, %[a2]\n"
+			"smc #0\n"
+			"str x0, [%[re0]]\n"
+			"str x1, [%[re1]]\n"
+			"str x2, [%[re2]]\n"
+			: [fid] "+r" (function_id), [a0] "+r" (arg0),
+				[a1] "+r" (arg1), [a2] "+r" (arg2)
+			: [re0] "r" (res0), [re1] "r" (res1), [re2] "r" (res2)
+			: "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
+				"x8", "x9",	"x10", "x11", "x12", "x13",
+				"x14", "x15", "x16", "x17");
+	return function_id;
+}
+
+void kbase_invoke_smc_fid(u32 fid)
+{
+	u64 res0, res1, res2;
+
+	/* Is fast call (bit 31 set) */
+	KBASE_DEBUG_ASSERT(fid & ~SMC_FAST_CALL);
+	/* bits 16-23 must be zero for fast calls */
+	KBASE_DEBUG_ASSERT((fid & (0xFF << 16)) == 0);
+
+	invoke_smc_fid(fid, 0, 0, 0, &res0, &res1, &res2);
+}
+
+void kbase_invoke_smc(u32 oen, u16 function_number, u64 arg0, u64 arg1,
+		u64 arg2, u64 *res0, u64 *res1, u64 *res2)
+{
+	u32 fid = 0;
+
+	/* Only the six bits allowed should be used. */
+	KBASE_DEBUG_ASSERT((oen & ~SMC_OEN_MASK) == 0);
+
+	fid |= SMC_FAST_CALL; /* Bit 31: Fast call */
+	/* Bit 30: 1=SMC64, 0=SMC32 */
+	fid |= oen; /* Bit 29:24: OEN */
+	/* Bit 23:16: Must be zero for fast calls */
+	fid |= (function_number); /* Bit 15:0: function number */
+
+	invoke_smc_fid(fid, arg0, arg1, arg2, res0, res1, res2);
+}
+
+#endif /* CONFIG_ARM64 */
+