blob: e88136e6f39ed8528bb5a2460624f178f06092b9 [file] [log] [blame]
Lukas Auer515b9342019-08-21 21:14:44 +02001// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2019 Fraunhofer AISEC,
4 * Lukas Auer <lukas.auer@aisec.fraunhofer.de>
5 *
6 * Based on common/spl/spl_atf.c
7 */
8#include <common.h>
Simon Glass63334482019-11-14 12:57:39 -07009#include <cpu_func.h>
Lukas Auer515b9342019-08-21 21:14:44 +020010#include <errno.h>
Simon Glassf11478f2019-12-28 10:45:07 -070011#include <hang.h>
Simon Glass2dc9c342020-05-10 11:40:01 -060012#include <image.h>
Lukas Auer515b9342019-08-21 21:14:44 +020013#include <spl.h>
14#include <asm/smp.h>
15#include <opensbi.h>
Simon Glass2dc9c342020-05-10 11:40:01 -060016#include <linux/libfdt.h>
Lukas Auer515b9342019-08-21 21:14:44 +020017
18DECLARE_GLOBAL_DATA_PTR;
19
20struct fw_dynamic_info opensbi_info;
21
22static int spl_opensbi_find_uboot_node(void *blob, int *uboot_node)
23{
24 int fit_images_node, node;
25 const char *fit_os;
26
27 fit_images_node = fdt_path_offset(blob, "/fit-images");
28 if (fit_images_node < 0)
29 return -ENODEV;
30
31 fdt_for_each_subnode(node, blob, fit_images_node) {
32 fit_os = fdt_getprop(blob, node, FIT_OS_PROP, NULL);
33 if (!fit_os)
34 continue;
35
36 if (genimg_get_os_id(fit_os) == IH_OS_U_BOOT) {
37 *uboot_node = node;
38 return 0;
39 }
40 }
41
42 return -ENODEV;
43}
44
45void spl_invoke_opensbi(struct spl_image_info *spl_image)
46{
47 int ret, uboot_node;
48 ulong uboot_entry;
49 void (*opensbi_entry)(ulong hartid, ulong dtb, ulong info);
50
51 if (!spl_image->fdt_addr) {
52 pr_err("No device tree specified in SPL image\n");
53 hang();
54 }
55
56 /* Find U-Boot image in /fit-images */
57 ret = spl_opensbi_find_uboot_node(spl_image->fdt_addr, &uboot_node);
58 if (ret) {
59 pr_err("Can't find U-Boot node, %d", ret);
60 hang();
61 }
62
63 /* Get U-Boot entry point */
64 uboot_entry = fdt_getprop_u32(spl_image->fdt_addr, uboot_node,
65 "entry-point");
66 if (uboot_entry == FDT_ERROR)
67 uboot_entry = fdt_getprop_u32(spl_image->fdt_addr, uboot_node,
68 "load-addr");
69
70 /* Prepare obensbi_info object */
71 opensbi_info.magic = FW_DYNAMIC_INFO_MAGIC_VALUE;
72 opensbi_info.version = FW_DYNAMIC_INFO_VERSION;
73 opensbi_info.next_addr = uboot_entry;
74 opensbi_info.next_mode = FW_DYNAMIC_INFO_NEXT_MODE_S;
75 opensbi_info.options = SBI_SCRATCH_NO_BOOT_PRINTS;
Lukas Auere105b612019-12-08 23:28:49 +010076 opensbi_info.boot_hart = gd->arch.boot_hart;
Lukas Auer515b9342019-08-21 21:14:44 +020077
78 opensbi_entry = (void (*)(ulong, ulong, ulong))spl_image->entry_point;
79 invalidate_icache_all();
80
Bin Mengb161f902020-04-16 08:09:30 -070081#ifdef CONFIG_SPL_SMP
Lukas Auerfcedb9a2019-12-08 23:28:52 +010082 /*
83 * Start OpenSBI on all secondary harts and wait for acknowledgment.
84 *
85 * OpenSBI first relocates itself to its link address. This is done by
86 * the main hart. To make sure no hart is still running U-Boot SPL
87 * during relocation, we wait for all secondary harts to acknowledge
88 * the call-function request before entering OpenSBI on the main hart.
89 * Otherwise, code corruption can occur if the link address ranges of
90 * U-Boot SPL and OpenSBI overlap.
91 */
Lukas Auer515b9342019-08-21 21:14:44 +020092 ret = smp_call_function((ulong)spl_image->entry_point,
93 (ulong)spl_image->fdt_addr,
Lukas Auerfcedb9a2019-12-08 23:28:52 +010094 (ulong)&opensbi_info, 1);
Lukas Auer515b9342019-08-21 21:14:44 +020095 if (ret)
96 hang();
97#endif
98 opensbi_entry(gd->arch.boot_hart, (ulong)spl_image->fdt_addr,
99 (ulong)&opensbi_info);
100}