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 <init.h>
13 #include <log.h>
14 #include <spl.h>
15 #include <image.h>
16 #include <asm/cache.h>
17 #include <asm/global_data.h>
18 #include <linux/compiler.h>
19 #include <asm/mach-types.h>
20
21 #ifndef CONFIG_SPL_DM
22 /* Pointer to as well as the global data structure for SPL */
23 DECLARE_GLOBAL_DATA_PTR;
24
25 /*
26 * WARNING: This is going away very soon. Don't use it and don't submit
27 * pafches that rely on it. The global_data area is set up in crt0.S.
28 */
29 gd_t gdata __section(".data");
30 #endif
31
32 /*
33 * In the context of SPL, board_init_f() prepares the hardware for execution
34 * from system RAM (DRAM, DDR...). As system RAM may not be available yet,
35 * board_init_f() must use the current GD to store any data which must be
36 * passed on to later stages. These data include the relocation destination,
37 * the future stack, and the future GD location. BSS is cleared after this
38 * function (and therefore must be accessible).
39 *
40 * We provide this version by default but mark it as __weak to allow for
41 * platforms to do this in their own way if needed. Please see the top
42 * level U-Boot README "Board Initialization Flow" section for info on what
43 * to put in this function.
44 */
board_init_f(ulong dummy)45 void __weak board_init_f(ulong dummy)
46 {
47 }
48
49 /*
50 * This function jumps to an image with argument. Normally an FDT or ATAGS
51 * image.
52 */
53 #ifdef CONFIG_SPL_OS_BOOT
54 #ifdef CONFIG_ARM64
jump_to_image_linux(struct spl_image_info * spl_image)55 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
56 {
57 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
58 cleanup_before_linux();
59 armv8_switch_to_el2((u64)spl_image->arg, 0, 0, 0,
60 spl_image->entry_point, ES_TO_AARCH64);
61 }
62 #else
jump_to_image_linux(struct spl_image_info * spl_image)63 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
64 {
65 unsigned long machid = 0xffffffff;
66 #ifdef CONFIG_MACH_TYPE
67 machid = CONFIG_MACH_TYPE;
68 #endif
69
70 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
71 typedef void (*image_entry_arg_t)(int, int, void *)
72 __attribute__ ((noreturn));
73 image_entry_arg_t image_entry =
74 (image_entry_arg_t)(uintptr_t) spl_image->entry_point;
75 cleanup_before_linux();
76 image_entry(0, machid, spl_image->arg);
77 }
78 #endif /* CONFIG_ARM64 */
79 #endif
80