015-OMAP-add-SDP3430

[Patch 15/17] U-Boot-V2:ARM:OMAP3: Add support for SDP3430 support files

This patch introduces support for OMAP Boards common infrastructure.

Signed-off-by: Nishanth Menon<x0nishan@ti.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/board/omap/platform.S b/board/omap/platform.S
new file mode 100644
index 0000000000..c6ce875112
--- /dev/null
+++ b/board/omap/platform.S
@@ -0,0 +1,65 @@
+/**
+ * @file
+ * @brief Wrapper to call board level initialization routine
+ *
+ * FileName: board/omap/platform.S
+ *
+ * board_init_lowlevel is defined here. This calls board_init which
+ * is linked to the binary - the board_init only has a SRAM stack.
+ * so it needs to be careful about the usage of global variables
+ * and the likes. Enabled only if CONFIG_MACH_DO_LOWLEVEL_INIT is
+ * defined
+ */
+/*
+ * (C) Copyright 2006-2008
+ * Texas Instruments, <www.ti.com>
+ * Nishanth Menon <x0nishan@ti.com>
+ *
+ * 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; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <asm/arch/silicon.h>
+
+#ifdef CONFIG_MACH_DO_LOWLEVEL_INIT
+/**
+ * @fn void board_init_lowlevel(void)
+ *
+ * @brief This provides a assembly wrapper setting up SRAM before calling
+ * board_init
+ *
+ * @return void
+ */
+.globl board_init_lowlevel
+board_init_lowlevel:
+	/* Setup a temporary stack so that we can call C functions
+	 * Yes. this might have been already done by arch code.
+	 * No harm in being a bit redundant to avoid future complications
+	 */
+	ldr	sp,	SRAM_STACK
+        str     ip,	[sp]    /* stash old link register */
+        str     lr,	[sp]    /* stash current link register */
+	mov	ip,	lr	/* save link reg across call */
+	/* Do the pin muxes, sdram init etc..board-xxx.c */
+	bl	board_init
+        ldr     lr,	[sp]    /* restore current link register */
+        ldr     ip,	[sp]    /* restore save ip */
+	/* back to arch calling code */
+	mov	pc,	lr
+SRAM_STACK:
+	.word	OMAP_SRAM_STACK
+
+#endif /* CONFIG_MACH_DO_LOWLEVEL_INIT */