arch/x86/lib/fsp2/fsp_dram.c

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