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>
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 0000000..6e8dd3b
--- /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) {}