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 */
board_init_f(ulong dummy)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
jump_to_image_linux(struct spl_image_info * spl_image)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
jump_to_image_linux(struct spl_image_info * spl_image)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