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1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2014, Bin Meng <[email protected]>
4  */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <errno.h>
9 #include <init.h>
10 #include <log.h>
11 #include <malloc.h>
12 #include <rtc.h>
13 #include <acpi/acpi_s3.h>
14 #include <asm/cmos_layout.h>
15 #include <asm/early_cmos.h>
16 #include <asm/global_data.h>
17 #include <asm/io.h>
18 #include <asm/mrccache.h>
19 #include <asm/post.h>
20 #include <asm/processor.h>
21 #include <asm/fsp1/fsp_support.h>
22
23 DECLARE_GLOBAL_DATA_PTR;
24
25 static void *fsp_prepare_mrc_cache(void)
26 {
27         struct mrc_data_container *cache;
28         struct mrc_region entry;
29         int ret;
30
31         ret = mrccache_get_region(MRC_TYPE_NORMAL, NULL, &entry);
32         if (ret)
33                 return NULL;
34
35         cache = mrccache_find_current(&entry);
36         if (!cache)
37                 return NULL;
38
39         debug("%s: mrc cache at %p, size %x checksum %04x\n", __func__,
40               cache->data, cache->data_size, cache->checksum);
41
42         return cache->data;
43 }
44
45 int arch_fsp_init(void)
46 {
47         void *nvs;
48         int stack = CONFIG_FSP_TEMP_RAM_ADDR;
49         int boot_mode = BOOT_FULL_CONFIG;
50         int prev_sleep_state;
51
52         if (IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)) {
53                 prev_sleep_state = chipset_prev_sleep_state();
54                 gd->arch.prev_sleep_state = prev_sleep_state;
55         }
56
57         if (!gd->arch.hob_list) {
58                 if (IS_ENABLED(CONFIG_ENABLE_MRC_CACHE))
59                         nvs = fsp_prepare_mrc_cache();
60                 else
61                         nvs = NULL;
62
63                 if (IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) &&
64                     prev_sleep_state == ACPI_S3) {
65                         if (nvs == NULL) {
66                                 /* If waking from S3 and no cache then */
67                                 debug("No MRC cache found in S3 resume path\n");
68                                 post_code(POST_RESUME_FAILURE);
69                                 /* Clear Sleep Type */
70                                 chipset_clear_sleep_state();
71                                 /* Reboot */
72                                 debug("Rebooting..\n");
73                                 outb(SYS_RST | RST_CPU, IO_PORT_RESET);
74                                 /* Should not reach here.. */
75                                 panic("Reboot System");
76                         }
77
78                         /*
79                          * DM is not available yet at this point, hence call
80                          * CMOS access library which does not depend on DM.
81                          */
82                         stack = cmos_read32(CMOS_FSP_STACK_ADDR);
83                         boot_mode = BOOT_ON_S3_RESUME;
84                 }
85
86                 /*
87                  * The first time we enter here, call fsp_init().
88                  * Note the execution does not return to this function,
89                  * instead it jumps to fsp_continue().
90                  */
91                 fsp_init(stack, boot_mode, nvs);
92         } else {
93                 /*
94                  * The second time we enter here, adjust the size of malloc()
95                  * pool before relocation. Given gd->malloc_base was adjusted
96                  * after the call to board_init_f_init_reserve() in arch/x86/
97                  * cpu/start.S, we should fix up gd->malloc_limit here.
98                  */
99                 gd->malloc_limit += CONFIG_FSP_SYS_MALLOC_F_LEN;
100         }
101
102         return 0;
103 }
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