uninit.c File Reference

#include "vm/vm.h"
#include "vm/uninit.h"

Include dependency graph for uninit.c:

Functions
static bool	uninit_initialize (struct page *page, void *kva)
static void	uninit_destroy (struct page *page)
void	uninit_new (struct page *page, void *va, vm_initializer *init, enum vm_type type, void *aux, bool(*initializer)(struct page *, enum vm_type, void *))

Variables
static const struct page_operations	uninit_ops

Function Documentation

uninit_destroy()

static void uninit_destroy ( struct page *  page )

static

                                   {
    struct uninit_page *uninit UNUSED = &page->uninit;
    /* TODO: Fill this function.
     * TODO: If you don't have anything to do, just return. */
    if (page->uninit.aux != NULL) // ? uninit.aux의 의미?
        free (page->uninit.aux);
    return;
}

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uninit_initialize()

static bool uninit_initialize ( struct page *  page, void *  kva  )

static

                                                 {
    struct uninit_page *uninit = &page->uninit;
 
    /* Fetch first, page_initialize may overwrite the values */
    // 가져오기 먼저하고, page_initialize 값을 덮어쓸 수 있음
    vm_initializer *init = uninit->init;
    void *aux = uninit->aux;
 
    /* TODO: You may need to fix this function. */
    return uninit->page_initializer (page, uninit->type, kva) &&
        (init ? init (page, aux) : true);
}

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uninit_new()

void uninit_new	(	struct page *	page,
		void *	va,
		vm_initializer *	init,
		enum vm_type	type,
		void *	aux,
		bool(*)(struct page *, enum vm_type, void *)	initializer
	)

                                                                  {
    ASSERT (page != NULL);
 
    *page = (struct page) {
        .operations = &uninit_ops, 
        // operations 필드로 uninit_ops를 설정해서 'VM_UNINIT'에 대한 처리를 해준다.
        .va = va,
        .frame = NULL, /* no frame for now */ // 현재는 물리 메모리와 매핑되지는 않은 상태
        .uninit = (struct uninit_page) {
            .init = init,
            .type = type,
            .aux = aux,
            .page_initializer = initializer,
        }
    };
}

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Variable Documentation

uninit_ops

const struct page_operations uninit_ops

static

Initial value:

= {
    .swap_in = uninit_initialize,
    .swap_out = NULL,
    .destroy = uninit_destroy,
    .type = VM_UNINIT,
}