EXYNOS: Move files from board/samsung to arch/arm

This patch performs the following:

1) Convert the assembly code for memory and clock initialization to C code.
2) Move the memory and clock init codes from board/samsung to arch/arm
3) Creat a common lowlevel_init file across Exynos4 and Exynos5. Converted
   the common lowlevel_init from assembly to C-code
4) Made spl_boot.c and tzpc_init.c common for both exynos4 and exynos5.
5) Enable CONFIG_SKIP_LOWLEVEL_INIT as stack pointer initialisation is already
   done in _main.
6) exynos-uboot-spl.lds made common across SMDKV310, Origen and SMDK5250.

TEST: Tested SD-MMC boot on SMDK5250 and Origen.
      Tested USB and SPI boot on SMDK5250
      Compile tested for SMDKV310.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

1 files changed, 203 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/exynos/spl_boot.c b/arch/arm/cpu/armv7/exynos/spl_boot.c
new file mode 100644
index 0000000000..6e8dd3b5d7
--- /dev/null
+++ b/arch/arm/cpu/armv7/exynos/spl_boot.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * 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<common.h>
+#include<config.h>
+
+#include <asm/arch/clock.h>
+#include <asm/arch/clk.h>
+#include <asm/arch/dmc.h>
+#include <asm/arch/power.h>
+#include <asm/arch/spl.h>
+
+#include "common_setup.h"
+#include "clock_init.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+#define OM_STAT         (0x1f << 1)
+
+/* Index into irom ptr table */
+enum index {
+	MMC_INDEX,
+	EMMC44_INDEX,
+	EMMC44_END_INDEX,
+	SPI_INDEX,
+	USB_INDEX,
+};
+
+/* IROM Function Pointers Table */
+u32 irom_ptr_table[] = {
+	[MMC_INDEX] = 0x02020030,	/* iROM Function Pointer-SDMMC boot */
+	[EMMC44_INDEX] = 0x02020044,	/* iROM Function Pointer-EMMC4.4 boot*/
+	[EMMC44_END_INDEX] = 0x02020048,/* iROM Function Pointer
+						-EMMC4.4 end boot operation */
+	[SPI_INDEX] = 0x02020058,	/* iROM Function Pointer-SPI boot */
+	[USB_INDEX] = 0x02020070,	/* iROM Function Pointer-USB boot*/
+	};
+
+void *get_irom_func(int index)
+{
+	return (void *)*(u32 *)irom_ptr_table[index];
+}
+
+#ifdef CONFIG_USB_BOOTING
+/*
+ * Set/clear program flow prediction and return the previous state.
+ */
+static int config_branch_prediction(int set_cr_z)
+{
+	unsigned int cr;
+
+	/* System Control Register: 11th bit Z Branch prediction enable */
+	cr = get_cr();
+	set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
+
+	return cr & CR_Z;
+}
+#endif
+
+/*
+* Copy U-boot from mmc to RAM:
+* COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
+* Pointer to API (Data transfer from mmc to ram)
+*/
+void copy_uboot_to_ram(void)
+{
+	enum boot_mode bootmode = BOOT_MODE_OM;
+
+	u32 (*copy_bl2)(u32 offset, u32 nblock, u32 dst) = NULL;
+	u32 offset = 0, size = 0;
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+	u32 (*copy_bl2_from_emmc)(u32 nblock, u32 dst);
+	void (*end_bootop_from_emmc)(void);
+#endif
+#ifdef CONFIG_USB_BOOTING
+	u32 (*usb_copy)(void);
+	int is_cr_z_set;
+	unsigned int sec_boot_check;
+
+	/* Read iRAM location to check for secondary USB boot mode */
+	sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
+	if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
+		bootmode = BOOT_MODE_USB;
+#endif
+
+	if (bootmode == BOOT_MODE_OM)
+		bootmode = readl(samsung_get_base_power()) & OM_STAT;
+
+	switch (bootmode) {
+#ifdef CONFIG_SPI_BOOTING
+	case BOOT_MODE_SERIAL:
+		offset = SPI_FLASH_UBOOT_POS;
+		size = CONFIG_BL2_SIZE;
+		copy_bl2 = get_irom_func(SPI_INDEX);
+		break;
+#endif
+	case BOOT_MODE_MMC:
+		offset = BL2_START_OFFSET;
+		size = BL2_SIZE_BLOC_COUNT;
+		copy_bl2 = get_irom_func(MMC_INDEX);
+		break;
+#ifdef CONFIG_SUPPORT_EMMC_BOOT
+	case BOOT_MODE_EMMC:
+		/* Set the FSYS1 clock divisor value for EMMC boot */
+		emmc_boot_clk_div_set();
+
+		copy_bl2_from_emmc = get_irom_func(EMMC44_INDEX);
+		end_bootop_from_emmc = get_irom_func(EMMC44_END_INDEX);
+
+		copy_bl2_from_emmc(BL2_SIZE_BLOC_COUNT, CONFIG_SYS_TEXT_BASE);
+		end_bootop_from_emmc();
+		break;
+#endif
+#ifdef CONFIG_USB_BOOTING
+	case BOOT_MODE_USB:
+		/*
+		 * iROM needs program flow prediction to be disabled
+		 * before copy from USB device to RAM
+		 */
+		is_cr_z_set = config_branch_prediction(0);
+		usb_copy = get_irom_func(USB_INDEX);
+		usb_copy();
+		config_branch_prediction(is_cr_z_set);
+		break;
+#endif
+	default:
+		break;
+	}
+
+	if (copy_bl2)
+		copy_bl2(offset, size, CONFIG_SYS_TEXT_BASE);
+}
+
+void memzero(void *s, size_t n)
+{
+	char *ptr = s;
+	size_t i;
+
+	for (i = 0; i < n; i++)
+		*ptr++ = '\0';
+}
+
+/**
+ * Set up the U-Boot global_data pointer
+ *
+ * This sets the address of the global data, and sets up basic values.
+ *
+ * @param gdp   Value to give to gd
+ */
+static void setup_global_data(gd_t *gdp)
+{
+	gd = gdp;
+	memzero((void *)gd, sizeof(gd_t));
+	gd->flags |= GD_FLG_RELOC;
+	gd->baudrate = CONFIG_BAUDRATE;
+	gd->have_console = 1;
+}
+
+void board_init_f(unsigned long bootflag)
+{
+	__aligned(8) gd_t local_gd;
+	__attribute__((noreturn)) void (*uboot)(void);
+
+	setup_global_data(&local_gd);
+
+	if (do_lowlevel_init())
+		power_exit_wakeup();
+
+	copy_uboot_to_ram();
+
+	/* Jump to U-Boot image */
+	uboot = (void *)CONFIG_SYS_TEXT_BASE;
+	(*uboot)();
+	/* Never returns Here */
+}
+
+/* Place Holders */
+void board_init_r(gd_t *id, ulong dest_addr)
+{
+	/* Function attribute is no-return */
+	/* This Function never executes */
+	while (1)
+		;
+}
+void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}