1 /* 2 * Copyright (c) 2019 Intel Corporation 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #include <zephyr/kernel.h> 8 #include <kernel_internal.h> 9 #include <zephyr/arch/x86/multiboot.h> 10 #include <zephyr/arch/x86/efi.h> 11 #include <x86_mmu.h> 12 13 extern FUNC_NORETURN void z_cstart(void); 14 extern void x86_64_irq_init(void); 15 16 #if !defined(CONFIG_X86_64) 17 __pinned_data x86_boot_arg_t x86_cpu_boot_arg; 18 #endif 19 20 /* Early global initialization functions, C domain. This runs only on the first 21 * CPU for SMP systems. 22 */ 23 __boot_func z_x86_prep_c(void * arg)24FUNC_NORETURN void z_x86_prep_c(void *arg) 25 { 26 x86_boot_arg_t *cpu_arg = arg; 27 28 _kernel.cpus[0].nested = 0; 29 30 #ifdef CONFIG_MMU 31 z_x86_mmu_init(); 32 #endif 33 34 #if defined(CONFIG_LOAPIC) 35 z_loapic_enable(0); 36 #endif 37 38 #ifdef CONFIG_X86_64 39 x86_64_irq_init(); 40 #endif 41 42 if (IS_ENABLED(CONFIG_MULTIBOOT_INFO) && 43 cpu_arg->boot_type == MULTIBOOT_BOOT_TYPE) { 44 z_multiboot_init((struct multiboot_info *)cpu_arg->arg); 45 } else if (IS_ENABLED(CONFIG_X86_EFI) && 46 cpu_arg->boot_type == EFI_BOOT_TYPE) { 47 efi_init((struct efi_boot_arg *)cpu_arg->arg); 48 } else { 49 ARG_UNUSED(cpu_arg); 50 } 51 52 #ifdef CONFIG_X86_VERY_EARLY_CONSOLE 53 z_x86_early_serial_init(); 54 55 #if defined(CONFIG_BOARD_QEMU_X86) || defined(CONFIG_BOARD_QEMU_X86_64) 56 /* 57 * Under QEMU and SeaBIOS, everything gets to be printed 58 * immediately after "Booting from ROM.." as there is no newline. 59 * This prevents parsing QEMU console output for the very first 60 * line where it needs to match from the beginning of the line. 61 * So add a dummy newline here so the next output is at 62 * the beginning of a line. 63 */ 64 arch_printk_char_out('\n'); 65 #endif 66 #endif 67 68 #if CONFIG_X86_STACK_PROTECTION 69 unsigned int num_cpus = arch_num_cpus(); 70 71 for (int i = 0; i < num_cpus; i++) { 72 z_x86_set_stack_guard(z_interrupt_stacks[i]); 73 } 74 #endif 75 76 #if defined(CONFIG_SMP) 77 z_x86_ipi_setup(); 78 #endif 79 80 z_cstart(); 81 } 82
