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Code Issues Releases Wiki Activity

new: kthread机制

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This commit is contained in:
fslongjin
2022-09-30 15:30:50 +08:00
parent edef02286e
commit 02a6b3a303
21 changed files with 802 additions and 326 deletions
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26
kernel/mm/mm.c
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@ -248,6 +248,8 @@ void mm_init()
initial_mm.stack_start = _stack_start;
initial_mm.vmas = NULL;
mmio_init();
}
@ -489,8 +491,30 @@ void page_table_init()
}
}
flush_tlb();
barrier();
// ========= 在IDLE进程的顶层页表中添加对内核地址空间的映射 =====================
// 由于IDLE进程的顶层页表的高地址部分会被后续进程所复制，为了使所有进程能够共享相同的内核空间，
// 因此需要先在IDLE进程的顶层页表内映射二级页表
uint64_t *idle_pml4t_vaddr = (uint64_t *)phys_2_virt((uint64_t)get_CR3() & (~0xfffUL));
for (int i = 256; i < 512; ++i)
{
uint64_t *tmp = idle_pml4t_vaddr + i;
barrier();
if (*tmp == 0)
{
void *pdpt = kmalloc(PAGE_4K_SIZE, 0);
barrier();
memset(pdpt, 0, PAGE_4K_SIZE);
barrier();
set_pml4t(tmp, mk_pml4t(virt_2_phys(pdpt), PAGE_KERNEL_PGT));
}
}
barrier();
flush_tlb();
kinfo("Page table Initialized. Affects:%d", js);
}