1 /* 2 * (C) Copyright 2010-2012 3 * Texas Instruments, <www.ti.com> 4 * 5 * Aneesh V <aneesh@ti.com> 6 * Tom Rini <trini@ti.com> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 #include <common.h> 11 #include <config.h> 12 #include <spl.h> 13 #include <image.h> 14 #include <linux/compiler.h> 15 16 /* Pointer to as well as the global data structure for SPL */ 17 DECLARE_GLOBAL_DATA_PTR; 18 gd_t gdata __attribute__ ((section(".data"))); 19 20 /* 21 * In the context of SPL, board_init_f must ensure that any clocks/etc for 22 * DDR are enabled, ensure that the stack pointer is valid, clear the BSS 23 * and call board_init_f. We provide this version by default but mark it 24 * as __weak to allow for platforms to do this in their own way if needed. 25 */ 26 void __weak board_init_f(ulong dummy) 27 { 28 /* Set the stack pointer. */ 29 asm volatile("mov sp, %0\n" : : "r"(CONFIG_SPL_STACK)); 30 31 /* Clear the BSS. */ 32 memset(__bss_start, 0, __bss_end - __bss_start); 33 34 /* Set global data pointer. */ 35 gd = &gdata; 36 37 board_init_r(NULL, 0); 38 } 39 40 /* 41 * This function jumps to an image with argument. Normally an FDT or ATAGS 42 * image. 43 * arg: Pointer to paramter image in RAM 44 */ 45 #ifdef CONFIG_SPL_OS_BOOT 46 void __noreturn jump_to_image_linux(void *arg) 47 { 48 unsigned long machid = 0xffffffff; 49 #ifdef CONFIG_MACH_TYPE 50 machid = CONFIG_MACH_TYPE; 51 #endif 52 53 debug("Entering kernel arg pointer: 0x%p\n", arg); 54 typedef void (*image_entry_arg_t)(int, int, void *) 55 __attribute__ ((noreturn)); 56 image_entry_arg_t image_entry = 57 (image_entry_arg_t) spl_image.entry_point; 58 cleanup_before_linux(); 59 image_entry(0, machid, arg); 60 } 61 #endif 62