arch/x86/cpu/queensbay/tnc.c

   1 /*
   2  * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/io.h>
   9 #include <asm/pci.h>
  10 #include <asm/post.h>
  11 #include <asm/arch/tnc.h>
  12 #include <asm/fsp/fsp_support.h>
  13 #include <asm/processor.h>
  14
  15 static void unprotect_spi_flash(void)
  16 {
  17         u32 bc;
  18
  19         bc = x86_pci_read_config32(PCH_LPC_DEV, 0xd8);
  20         bc |= 0x1;      /* unprotect the flash */
  21         x86_pci_write_config32(PCH_LPC_DEV, 0xd8, bc);
  22 }
  23
  24 int arch_cpu_init(void)
  25 {
  26         struct pci_controller *hose;
  27         int ret;
  28
  29         post_code(POST_CPU_INIT);
  30 #ifdef CONFIG_SYS_X86_TSC_TIMER
  31         timer_set_base(rdtsc());
  32 #endif
  33
  34         ret = x86_cpu_init_f();
  35         if (ret)
  36                 return ret;
  37
  38         ret = pci_early_init_hose(&hose);
  39         if (ret)
  40                 return ret;
  41
  42         unprotect_spi_flash();
  43
  44         return 0;
  45 }