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 = pci_read_config32(PCH_LPC_DEV, 0xd8); 20 bc |= 0x1; /* unprotect the flash */ 21 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 } 46