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 <config.h>
11 #include <init.h>
12 #include <log.h>
13 #include <spl.h>
14 #include <image.h>
15 #include <asm/cache.h>
16 #include <asm/global_data.h>
17 #include <linux/compiler.h>
18 #include <asm/mach-types.h>
19
20 #ifndef CONFIG_SPL_DM
21 /* Pointer to as well as the global data structure for SPL */
22 DECLARE_GLOBAL_DATA_PTR;
23
24 /*
25 * WARNING: This is going away very soon. Don't use it and don't submit
26 * pafches that rely on it. The global_data area is set up in crt0.S.
27 */
28 gd_t gdata __section(".data");
29 #endif
30
31 /*
32 * In the context of SPL, board_init_f() prepares the hardware for execution
33 * from system RAM (DRAM, DDR...). As system RAM may not be available yet,
34 * board_init_f() must use the current GD to store any data which must be
35 * passed on to later stages. These data include the relocation destination,
36 * the future stack, and the future GD location. BSS is cleared after this
37 * function (and therefore must be accessible).
38 *
39 * We provide this version by default but mark it as __weak to allow for
40 * platforms to do this in their own way if needed. Please see the top
41 * level U-Boot README "Board Initialization Flow" section for info on what
42 * to put in this function.
43 */
board_init_f(ulong dummy)44 void __weak board_init_f(ulong dummy)
45 {
46 }
47
48 /*
49 * This function jumps to an image with argument. Normally an FDT or ATAGS
50 * image.
51 */
52 #if CONFIG_IS_ENABLED(OS_BOOT)
53 #ifdef CONFIG_ARM64
jump_to_image_linux(struct spl_image_info * spl_image)54 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
55 {
56 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
57 cleanup_before_linux();
58 armv8_switch_to_el2((u64)spl_image->arg, 0, 0, 0,
59 spl_image->entry_point, ES_TO_AARCH64);
60 }
61 #else
jump_to_image_linux(struct spl_image_info * spl_image)62 void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
63 {
64 unsigned long machid = 0xffffffff;
65 #ifdef CONFIG_MACH_TYPE
66 machid = CONFIG_MACH_TYPE;
67 #endif
68
69 debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
70 typedef void (*image_entry_arg_t)(int, int, void *)
71 __attribute__ ((noreturn));
72 image_entry_arg_t image_entry =
73 (image_entry_arg_t)(uintptr_t) spl_image->entry_point;
74 cleanup_before_linux();
75 image_entry(0, machid, spl_image->arg);
76 }
77 #endif /* CONFIG_ARM64 */
78 #endif
79
80 #if CONFIG_IS_ENABLED(OPTEE_IMAGE)
jump_to_image_optee(struct spl_image_info * spl_image)81 void __noreturn jump_to_image_optee(struct spl_image_info *spl_image)
82 {
83 /* flush and turn off caches before jumping to OPTEE */
84 cleanup_before_linux();
85
86 spl_optee_entry(NULL, NULL, spl_image->fdt_addr,
87 (void *)spl_image->entry_point);
88 }
89 #endif
90