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 11 #include <common.h> 12 #include <config.h> 13 #include <spl.h> 14 #include <image.h> 15 #include <linux/compiler.h> 16 #include <asm/mach-types.h> 17 18 #ifndef CONFIG_SPL_DM 19 /* Pointer to as well as the global data structure for SPL */ 20 DECLARE_GLOBAL_DATA_PTR; 21 22 /* 23 * WARNING: This is going away very soon. Don't use it and don't submit 24 * pafches that rely on it. The global_data area is set up in crt0.S. 25 */ 26 gd_t gdata __attribute__ ((section(".data"))); 27 #endif 28 29 /* 30 * In the context of SPL, board_init_f() prepares the hardware for execution 31 * from system RAM (DRAM, DDR...). As system RAM may not be available yet, 32 * board_init_f() must use the current GD to store any data which must be 33 * passed on to later stages. These data include the relocation destination, 34 * the future stack, and the future GD location. BSS is cleared after this 35 * function (and therefore must be accessible). 36 * 37 * We provide this version by default but mark it as __weak to allow for 38 * platforms to do this in their own way if needed. Please see the top 39 * level U-Boot README "Board Initialization Flow" section for info on what 40 * to put in this function. 41 */ 42 void __weak board_init_f(ulong dummy) 43 { 44 } 45 46 /* 47 * This function jumps to an image with argument. Normally an FDT or ATAGS 48 * image. 49 */ 50 #ifdef CONFIG_SPL_OS_BOOT 51 #ifdef CONFIG_ARM64 52 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image) 53 { 54 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg); 55 cleanup_before_linux(); 56 armv8_switch_to_el2((u64)spl_image->arg, 0, 0, 0, 57 spl_image->entry_point, ES_TO_AARCH64); 58 } 59 #else 60 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image) 61 { 62 unsigned long machid = 0xffffffff; 63 #ifdef CONFIG_MACH_TYPE 64 machid = CONFIG_MACH_TYPE; 65 #endif 66 67 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg); 68 typedef void (*image_entry_arg_t)(int, int, void *) 69 __attribute__ ((noreturn)); 70 image_entry_arg_t image_entry = 71 (image_entry_arg_t)(uintptr_t) spl_image->entry_point; 72 cleanup_before_linux(); 73 image_entry(0, machid, spl_image->arg); 74 } 75 #endif /* CONFIG_ARM64 */ 76 #endif 77