1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2010-2012 4 * Texas Instruments, <www.ti.com> 5 * 6 * Aneesh V <aneesh@ti.com> 7 * Tom Rini <trini@ti.com> 8 */ 9 10 #include <common.h> 11 #include <config.h> 12 #include <spl.h> 13 #include <image.h> 14 #include <linux/compiler.h> 15 #include <asm/mach-types.h> 16 17 #ifndef CONFIG_SPL_DM 18 /* Pointer to as well as the global data structure for SPL */ 19 DECLARE_GLOBAL_DATA_PTR; 20 21 /* 22 * WARNING: This is going away very soon. Don't use it and don't submit 23 * pafches that rely on it. The global_data area is set up in crt0.S. 24 */ 25 gd_t gdata __attribute__ ((section(".data"))); 26 #endif 27 28 /* 29 * In the context of SPL, board_init_f() prepares the hardware for execution 30 * from system RAM (DRAM, DDR...). As system RAM may not be available yet, 31 * board_init_f() must use the current GD to store any data which must be 32 * passed on to later stages. These data include the relocation destination, 33 * the future stack, and the future GD location. BSS is cleared after this 34 * function (and therefore must be accessible). 35 * 36 * We provide this version by default but mark it as __weak to allow for 37 * platforms to do this in their own way if needed. Please see the top 38 * level U-Boot README "Board Initialization Flow" section for info on what 39 * to put in this function. 40 */ 41 void __weak board_init_f(ulong dummy) 42 { 43 } 44 45 /* 46 * This function jumps to an image with argument. Normally an FDT or ATAGS 47 * image. 48 */ 49 #ifdef CONFIG_SPL_OS_BOOT 50 #ifdef CONFIG_ARM64 51 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image) 52 { 53 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg); 54 cleanup_before_linux(); 55 armv8_switch_to_el2((u64)spl_image->arg, 0, 0, 0, 56 spl_image->entry_point, ES_TO_AARCH64); 57 } 58 #else 59 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image) 60 { 61 unsigned long machid = 0xffffffff; 62 #ifdef CONFIG_MACH_TYPE 63 machid = CONFIG_MACH_TYPE; 64 #endif 65 66 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg); 67 typedef void (*image_entry_arg_t)(int, int, void *) 68 __attribute__ ((noreturn)); 69 image_entry_arg_t image_entry = 70 (image_entry_arg_t)(uintptr_t) spl_image->entry_point; 71 cleanup_before_linux(); 72 image_entry(0, machid, spl_image->arg); 73 } 74 #endif /* CONFIG_ARM64 */ 75 #endif 76