omap4/5/am33xx: Make lowlevel_init available to all armv7 platforms

Make the lowlevel_init function that these platforms have which just
sets up the stack and calls a C function available to all armv7
platforms.  As part of this we change some of the macros that are used
to be more clear.  Previously (except for am335x evm) we had been
setting CONFIG_SYS_INIT_SP_ADDR to a series of new defines that are
equivalent to simply referencing NON_SECURE_SRAM_END.  On am335x evm we
should have been doing this initially and do now.

Cc: Sricharan R <r.sricharan@ti.com>
Tested-by: Allen Martin <amartin@nvidia.com>
Signed-off-by: Tom Rini <trini@ti.com>

7 files changed, 57 insertions, 24 deletions

diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile
index 6b2addca11..788eadaaf3 100644
--- a/arch/arm/cpu/armv7/Makefile
+++ b/arch/arm/cpu/armv7/Makefile
@@ -32,8 +32,12 @@ COBJS	+= cache_v7.o
 COBJS	+= cpu.o
 COBJS	+= syslib.o
 
+ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),)
+SOBJS	+= lowlevel_init.o
+endif
+
 SRCS	:= $(START:.o=.S) $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
+OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
 START	:= $(addprefix $(obj),$(START))
 
 all:	$(obj).depend $(START) $(LIB)
diff --git a/arch/arm/cpu/armv7/lowlevel_init.S b/arch/arm/cpu/armv7/lowlevel_init.S
new file mode 100644
index 0000000000..ef04575e82
--- /dev/null
+++ b/arch/arm/cpu/armv7/lowlevel_init.S
@@ -0,0 +1,50 @@
+/*
+ * A lowlevel_init function that sets up the stack to call a C function to
+ * perform further init.
+ *
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ *	Aneesh V	<aneesh@ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <asm-offsets.h>
+#include <config.h>
+#include <linux/linkage.h>
+
+ENTRY(lowlevel_init)
+	/*
+	 * Setup a temporary stack
+	 */
+	ldr	sp, =CONFIG_SYS_INIT_SP_ADDR
+
+	/*
+	 * Save the old lr(passed in ip) and the current lr to stack
+	 */
+	push	{ip, lr}
+
+	/*
+	 * go setup pll, mux, memory
+	 */
+	bl	s_init
+	pop	{ip, pc}
+ENDPROC(lowlevel_init)
diff --git a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
index ccc6bb6b85..1ece073630 100644
--- a/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
+++ b/arch/arm/cpu/armv7/omap-common/lowlevel_init.S
@@ -78,24 +78,6 @@ ENTRY(save_boot_params)
 	bx	lr
 ENDPROC(save_boot_params)
 
-ENTRY(lowlevel_init)
-	/*
-	 * Setup a temporary stack
-	 */
-	ldr	sp, =LOW_LEVEL_SRAM_STACK
-
-	/*
-	 * Save the old lr(passed in ip) and the current lr to stack
-	 */
-	push	{ip, lr}
-
-	/*
-	 * go setup pll, mux, memory
-	 */
-	bl	s_init
-	pop	{ip, pc}
-ENDPROC(lowlevel_init)
-
 ENTRY(set_pl310_ctrl_reg)
 	PUSH	{r4-r11, lr}	@ save registers - ROM code may pollute
 				@ our registers
diff --git a/arch/arm/include/asm/arch-am33xx/hardware.h b/arch/arm/include/asm/arch-am33xx/hardware.h
index c617331854..62332f2ded 100644
--- a/arch/arm/include/asm/arch-am33xx/hardware.h
+++ b/arch/arm/include/asm/arch-am33xx/hardware.h
@@ -19,8 +19,9 @@
 #ifndef __AM33XX_HARDWARE_H
 #define __AM33XX_HARDWARE_H
 
+#include <asm/arch/omap.h>
+
 /* Module base addresses */
-#define LOW_LEVEL_SRAM_STACK		0x4030B7FC
 #define UART0_BASE			0x44E09000
 
 /* DM Timer base addresses */
diff --git a/arch/arm/include/asm/arch-am33xx/omap.h b/arch/arm/include/asm/arch-am33xx/omap.h
index fc2b7a5a28..850f8a551d 100644
--- a/arch/arm/include/asm/arch-am33xx/omap.h
+++ b/arch/arm/include/asm/arch-am33xx/omap.h
@@ -30,7 +30,6 @@
  */
 #define NON_SECURE_SRAM_START	0x40304000
 #define NON_SECURE_SRAM_END	0x4030E000
-#define LOW_LEVEL_SRAM_STACK	0x4030B7FC
 
 /* ROM code defines */
 /* Boot device */
diff --git a/arch/arm/include/asm/arch-omap4/omap.h b/arch/arm/include/asm/arch-omap4/omap.h
index 03bd923145..d4b5076108 100644
--- a/arch/arm/include/asm/arch-omap4/omap.h
+++ b/arch/arm/include/asm/arch-omap4/omap.h
@@ -172,7 +172,6 @@ struct control_lpddr2io_regs {
 /* base address for indirect vectors (internal boot mode) */
 #define SRAM_ROM_VECT_BASE	0x4030D000
 /* Temporary SRAM stack used while low level init is done */
-#define LOW_LEVEL_SRAM_STACK		NON_SECURE_SRAM_END
 #define SRAM_SCRATCH_SPACE_ADDR		NON_SECURE_SRAM_START
 /* SRAM scratch space entries */
 #define OMAP4_SRAM_SCRATCH_OMAP4_REV	SRAM_SCRATCH_SPACE_ADDR
diff --git a/arch/arm/include/asm/arch-omap5/omap.h b/arch/arm/include/asm/arch-omap5/omap.h
index 7f05cb5b4a..9dce49ac4b 100644
--- a/arch/arm/include/asm/arch-omap5/omap.h
+++ b/arch/arm/include/asm/arch-omap5/omap.h
@@ -262,8 +262,6 @@ struct omap_sys_ctrl_regs {
 #define NON_SECURE_SRAM_END	0x40320000	/* Not inclusive */
 /* base address for indirect vectors (internal boot mode) */
 #define SRAM_ROM_VECT_BASE	0x4031F000
-/* Temporary SRAM stack used while low level init is done */
-#define LOW_LEVEL_SRAM_STACK	NON_SECURE_SRAM_END
 
 #define SRAM_SCRATCH_SPACE_ADDR		NON_SECURE_SRAM_START
 /*