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linux引导过程

Linux引导过程

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3.1.2 �ں��� �������ϵͳ���Ժ� ������ת�� Linux �ں���� startup_32 �� �� arch/i386/kernel/head.S ļ У Ϊ ¼ � �� �������Է� ��� ��� ׶Ρ (1) �ں����һ�� ׶ D D ������ ׶ ṹ��ʼ�� start_kernel() е к ׶ ij kernel ����� �����һϵ� ����� ṹ� ʼ����������� ���� á а ( ж ����� ���� � ҳ��ṹ��ʼ����� ϳ�ʼ������̵�ȳ�ʼ������ʱ���ʼ���� �ڴ�� ʼ����� ׶ д Щ е ģ е õIJŻ �����ʼ���ȣ��� ����� ��ǹ���� �� �������Ҫ��� �ִ� еġ ִ��������� ׶ ij ׶ init ṹ� �ʼ��� ��� ��̡� Ŀ¼ init/main.c ļ У start_kernel() £ ��Դ���� �� � �� ����Կ��� ����������� ���ɾ ���� ׶ ����ں ׶ ׶ ׶ ׶ ׶ ׶ ׶ ׶׶ ׶ ׶ ׶ ׶ ׶ ׶ �����������ϸʵ�ּ� ļ Դ� ����� l Linux ��� ׶ �� printk(linux_banner) Ϣ�� �� l ��������ϵ�ṹ��ص Ļ setup_arch() ����� �� l paging_init() ҳ��ṹ��ʼ���� �� l "arch/alpha/kernel/entry.S" е ʹ�� � ���ڵ�����ϵͳ������ڣ� trap_init() �� l alpha_mv entry.S ʹ�� �ṹ�� ��ڳ� IRQ init_IRQ() ʼ��ϵͳ �� �� l Ľ ( Bottom-half sched_init() ��� �̵�����ʼ������ ��ʼ������ȱʡ�� �� �� l ʱ� ׶ �� ( CMOS 2 ж ʱ���ʼ������ ��ȡ ʱ�ӡ�� ���Ƶ����ʼ����ʱ��� ϵȣ� time_init() �� l ׶ ж ��ȡ��������������ӻ����� � ȡ����������Ӧ�� ־ λ ׶ �ȴ�� parse_options() �� �� l Ϊ PCI console_init() ����̨��ʼ���� �����Ϣ������ ��ʼ���� �� l ׶ prof_buffer prof_len ׶׶ ׶ �������� ṹ��ʼ���� �� �� l Cache Cache Cache kmem_cache_init() ���� ��ʼ�������� ��Ϣ�� �� �� l У �ӳ� ׶ ����� jiffies CPU ticks ʱ�� �� ��Ƶ ���ӳ ٣� calibrate_delay() �� l �ڴ��ʼ���������ڴ���� ½ ��ҳ�����ʼֵ�� mem_init() �� l �����������ڲ�� ׶ cache "slab_cache" kmem_cache_sizes_init)( ��� �� �� l uid taskcount SLAB cache "uid_cache" uidcache_init() ���� �� �� �� l ļ cache "files_cache" filescache_init() ����� � �� �� �� l Ŀ¼cache "dentry_cache" dcache_init() ���� �� �� �� l
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