1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2019 Google LLC
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #define LOG_CATEGORY LOGC_ARCH
8
9 #include <common.h>
10 #include <handoff.h>
11 #include <init.h>
12 #include <log.h>
13 #include <spl.h>
14 #include <acpi/acpi_s3.h>
15 #include <asm/arch/cpu.h>
16 #include <asm/fsp/fsp_support.h>
17 #include <asm/fsp2/fsp_api.h>
18 #include <asm/fsp2/fsp_internal.h>
19 #include <asm/global_data.h>
20 #include <linux/sizes.h>
21
dram_init(void)22 int dram_init(void)
23 {
24 int ret;
25
26 if (!ll_boot_init()) {
27 /* Use a small and safe amount of 1GB */
28 gd->ram_size = SZ_1G;
29
30 return 0;
31 }
32 if (spl_phase() == PHASE_SPL) {
33 bool s3wake = false;
34
35 s3wake = IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) &&
36 gd->arch.prev_sleep_state == ACPI_S3;
37
38 ret = fsp_memory_init(s3wake,
39 IS_ENABLED(CONFIG_APL_BOOT_FROM_FAST_SPI_FLASH));
40 if (ret) {
41 log_debug("Memory init failed (err=%x)\n", ret);
42 return ret;
43 }
44
45 /* The FSP has already set up DRAM, so grab the info we need */
46 ret = fsp_scan_for_ram_size();
47 if (ret)
48 return ret;
49
50 #ifdef CONFIG_ENABLE_MRC_CACHE
51 gd->arch.mrc[MRC_TYPE_NORMAL].buf =
52 fsp_get_nvs_data(gd->arch.hob_list,
53 &gd->arch.mrc[MRC_TYPE_NORMAL].len);
54 gd->arch.mrc[MRC_TYPE_VAR].buf =
55 fsp_get_var_nvs_data(gd->arch.hob_list,
56 &gd->arch.mrc[MRC_TYPE_VAR].len);
57 log_debug("normal %x, var %x\n",
58 gd->arch.mrc[MRC_TYPE_NORMAL].len,
59 gd->arch.mrc[MRC_TYPE_VAR].len);
60 #endif
61 } else {
62 #if CONFIG_IS_ENABLED(HANDOFF)
63 struct spl_handoff *ho = gd->spl_handoff;
64
65 if (!ho) {
66 log_debug("No SPL handoff found\n");
67 return -ESTRPIPE;
68 }
69 gd->ram_size = ho->ram_size;
70 handoff_load_dram_banks(ho);
71 #endif
72 ret = arch_fsps_preinit();
73 if (ret)
74 return log_msg_ret("fsp_s_preinit", ret);
75 }
76
77 return 0;
78 }
79
board_get_usable_ram_top(ulong total_size)80 ulong board_get_usable_ram_top(ulong total_size)
81 {
82 if (!ll_boot_init())
83 return gd->ram_size;
84
85 #if CONFIG_IS_ENABLED(HANDOFF)
86 struct spl_handoff *ho = gd->spl_handoff;
87
88 log_debug("usable_ram_top = %lx\n", ho->arch.usable_ram_top);
89
90 return ho->arch.usable_ram_top;
91 #endif
92
93 return gd->ram_top;
94 }
95