1 files changed, 47 insertions, 0 deletions
diff --git a/src/soc/nvidia/tegra132/stack.S b/src/soc/nvidia/tegra132/stack.S
new file mode 100644
index 0000000000..6d3cd4e446
--- /dev/null
+++ b/src/soc/nvidia/tegra132/stack.S
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google Inc.
+ *
+ * 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 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/* Macro to initialize stack, perform seeding if required and finally call the
+ * function provided
+ * @stack : Stack address
+ * @size  : Stack size
+ * @seed  : Stack seeding required (1=yes/otherwise=no)
+ * @func  : Function to call after initializing stack
+ */
+.macro stack_init stack, size, seed, func
+        /* Check if stack seeding is required */
+	mov	r0, #\seed
+	cmp     r0, #1
+	bne     call_func
+	/* Stack seeding */
+	ldr     r0, \stack
+	ldr	r1, \size
+	sub	r0, r0, r1
+	ldr	r1, \stack
+	ldr	r2, =0xdeadbeef
+init_stack_loop:
+	str	r2, [r0]
+	add	r0, #4
+	cmp	r0, r1
+	bne	init_stack_loop
+
+call_func:
+	ldr	sp, \stack /* Set up stack pointer */
+	bl	\func
+.endm