Update from 2013.01 to 2013.07

[karo-tx-uboot.git] / arch / arm / cpu / armv7 / exynos / spl_boot.c

diff --git a/arch/arm/cpu/armv7/exynos/spl_boot.c b/arch/arm/cpu/armv7/exynos/spl_boot.c
new file mode 100644 (file)
index 0000000..3651c00
--- /dev/null
+++ b/arch/arm/cpu/armv7/exynos/spl_boot.c
@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2012 Samsung Electronics
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#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) {}