src/soc/intel/apollolake/cse.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright 2017 Google, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <arch/io.h>
  17 #include <bootstate.h>
  18 #include <console/console.h>
  19 #include <soc/pci_devs.h>
  20 #include <stdint.h>
  21
  22 #define PCI_ME_HFSTS1   0x40
  23 #define PCI_ME_HFSTS2   0x48
  24 #define PCI_ME_HFSTS3   0x60
  25 #define PCI_ME_HFSTS4   0x64
  26 #define PCI_ME_HFSTS5   0x68
  27 #define PCI_ME_HFSTS6   0x6c
  28
  29 static uint32_t dump_status(int index, int reg_addr)
  30 {
  31         uint32_t reg = pci_read_config32(CSE_DEV, reg_addr);
  32
  33         printk(BIOS_DEBUG, "CSE FWSTS%d: 0x%08x\n", index, reg);
  34
  35         return reg;
  36 }
  37
  38 static void dump_cse_state(void *unused)
  39 {
  40         uint32_t fwsts1;
  41
  42         fwsts1 = dump_status(1, PCI_ME_HFSTS1);
  43         dump_status(2, PCI_ME_HFSTS2);
  44         dump_status(3, PCI_ME_HFSTS3);
  45         dump_status(4, PCI_ME_HFSTS4);
  46         dump_status(5, PCI_ME_HFSTS5);
  47         dump_status(6, PCI_ME_HFSTS6);
  48
  49         /* Minimal decoding is done here in order to call out most important
  50            pieces. Manufacturing mode needs to be locked down prior to shipping
  51            the product so it's called out explicitly. */
  52         printk(BIOS_DEBUG, "ME: Manufacturing Mode      : %s\n",
  53                 (fwsts1 & (1 << 0x4)) ? "YES" : "NO");
  54 }
  55
  56 BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, dump_cse_state, NULL);
  57 BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, dump_cse_state, NULL);