2 * Copyright (C) 2012 Samsung Electronics
4 * See file CREDITS for list of people who contributed to this
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
28 BOOT_MODE_SERIAL = 20,
29 /* Boot based on Operating Mode pin settings */
31 BOOT_MODE_USB, /* Boot using USB download */
34 typedef u32 (*spi_copy_func_t)(u32 offset, u32 nblock, u32 dst);
35 typedef u32 (*usb_copy_func_t)(void);
38 * Set/clear program flow prediction and return the previous state.
40 static int config_branch_prediction(int set_cr_z)
44 /* System Control Register: 11th bit Z Branch prediction enable */
46 set_cr(set_cr_z ? cr | CR_Z : cr & ~CR_Z);
52 * Copy U-boot from mmc to RAM:
53 * COPY_BL2_FNPTR_ADDR: Address in iRAM, which Contains
54 * Pointer to API (Data transfer from mmc to ram)
56 void copy_uboot_to_ram(void)
58 spi_copy_func_t spi_copy;
59 usb_copy_func_t usb_copy;
62 unsigned int sec_boot_check;
63 enum boot_mode bootmode = BOOT_MODE_OM;
64 u32 (*copy_bl2)(u32, u32, u32);
66 /* Read iRAM location to check for secondary USB boot mode */
67 sec_boot_check = readl(EXYNOS_IRAM_SECONDARY_BASE);
68 if (sec_boot_check == EXYNOS_USB_SECONDARY_BOOT)
69 bootmode = BOOT_MODE_USB;
71 if (bootmode == BOOT_MODE_OM)
72 bootmode = readl(EXYNOS5_POWER_BASE) & OM_STAT;
75 case BOOT_MODE_SERIAL:
76 spi_copy = *(spi_copy_func_t *)EXYNOS_COPY_SPI_FNPTR_ADDR;
77 spi_copy(SPI_FLASH_UBOOT_POS, CONFIG_BL2_SIZE,
78 CONFIG_SYS_TEXT_BASE);
81 copy_bl2 = (void *) *(u32 *)COPY_BL2_FNPTR_ADDR;
82 copy_bl2(BL2_START_OFFSET, BL2_SIZE_BLOC_COUNT,
83 CONFIG_SYS_TEXT_BASE);
87 * iROM needs program flow prediction to be disabled
88 * before copy from USB device to RAM
90 is_cr_z_set = config_branch_prediction(0);
91 usb_copy = *(usb_copy_func_t *)
92 EXYNOS_COPY_USB_FNPTR_ADDR;
94 config_branch_prediction(is_cr_z_set);
101 void board_init_f(unsigned long bootflag)
103 __attribute__((noreturn)) void (*uboot)(void);
106 /* Jump to U-Boot image */
107 uboot = (void *)CONFIG_SYS_TEXT_BASE;
109 /* Never returns Here */
113 void board_init_r(gd_t *id, ulong dest_addr)
115 /* Function attribute is no-return */
116 /* This Function never executes */
121 void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3) {}