83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/*
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* Copyright (c) 2019 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <zephyr/kernel.h>
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#include <kernel_internal.h>
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#include <zephyr/arch/x86/multiboot.h>
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#include <zephyr/arch/x86/efi.h>
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#include <x86_mmu.h>
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extern FUNC_NORETURN void z_cstart(void);
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extern void x86_64_irq_init(void);
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#if !defined(CONFIG_X86_64)
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__pinned_data x86_boot_arg_t x86_cpu_boot_arg;
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#endif
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/* Early global initialization functions, C domain. This runs only on the first
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* CPU for SMP systems.
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*/
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__boot_func
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FUNC_NORETURN void z_prep_c(void *arg)
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{
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x86_boot_arg_t *cpu_arg = arg;
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_kernel.cpus[0].nested = 0;
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#ifdef CONFIG_MMU
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z_x86_mmu_init();
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#endif
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#if defined(CONFIG_LOAPIC)
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z_loapic_enable(0);
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#endif
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#ifdef CONFIG_X86_64
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x86_64_irq_init();
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#endif
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if (IS_ENABLED(CONFIG_MULTIBOOT_INFO) &&
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cpu_arg->boot_type == MULTIBOOT_BOOT_TYPE) {
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z_multiboot_init((struct multiboot_info *)cpu_arg->arg);
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} else if (IS_ENABLED(CONFIG_X86_EFI) &&
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cpu_arg->boot_type == EFI_BOOT_TYPE) {
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efi_init((struct efi_boot_arg *)cpu_arg->arg);
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} else {
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ARG_UNUSED(cpu_arg);
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}
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#ifdef CONFIG_X86_VERY_EARLY_CONSOLE
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z_x86_early_serial_init();
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#if defined(CONFIG_BOARD_QEMU_X86) || defined(CONFIG_BOARD_QEMU_X86_64)
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/*
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* Under QEMU and SeaBIOS, everything gets to be printed
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* immediately after "Booting from ROM.." as there is no newline.
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* This prevents parsing QEMU console output for the very first
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* line where it needs to match from the beginning of the line.
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* So add a dummy newline here so the next output is at
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* the beginning of a line.
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*/
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arch_printk_char_out('\n');
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#endif
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#endif
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#if CONFIG_X86_STACK_PROTECTION
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unsigned int num_cpus = arch_num_cpus();
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for (int i = 0; i < num_cpus; i++) {
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z_x86_set_stack_guard(z_interrupt_stacks[i]);
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}
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#endif
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#if defined(CONFIG_SMP)
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z_x86_ipi_setup();
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#endif
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z_cstart();
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CODE_UNREACHABLE;
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}
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