Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b50efd2a authored by Yinghai Lu's avatar Yinghai Lu Committed by Ingo Molnar
Browse files

x86: introduce page_size_mask for 64bit 



prepare for overmapped patch

also printout last_map_addr together with end

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 26e9e57b

arch/x86/mm/init_64.c

+63 −35
Original line number Diff line number Diff line
@@ -340,7 +340,8 @@ phys_pte_update(pmd_t *pmd, unsigned long address, unsigned long end) 
}



static unsigned long __meminit

phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end)

phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,

			 unsigned long page_size_mask)

{

	unsigned long pages = 0;
@@ -365,7 +366,7 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) 
			continue;

		}



		if (cpu_has_pse) {

		if (page_size_mask & (1<<PG_LEVEL_2M)) {

			pages++;

			set_pte((pte_t *)pmd,

				pfn_pte(address >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
@@ -383,20 +384,22 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) 
}



static unsigned long __meminit

phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end)

phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end,

			 unsigned long page_size_mask)

{

	pmd_t *pmd = pmd_offset(pud, 0);

	unsigned long last_map_addr;



	spin_lock(&init_mm.page_table_lock);

	last_map_addr = phys_pmd_init(pmd, address, end);

	last_map_addr = phys_pmd_init(pmd, address, end, page_size_mask);

	spin_unlock(&init_mm.page_table_lock);

	__flush_tlb_all();

	return last_map_addr;

}



static unsigned long __meminit

phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end)

phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,

			 unsigned long page_size_mask)

{

	unsigned long pages = 0;

	unsigned long last_map_addr = end;
@@ -418,11 +421,12 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end) 


		if (pud_val(*pud)) {

			if (!pud_large(*pud))

				last_map_addr = phys_pmd_update(pud, addr, end);

				last_map_addr = phys_pmd_update(pud, addr, end,

							 page_size_mask);

			continue;

		}



		if (direct_gbpages) {

		if (page_size_mask & (1<<PG_LEVEL_1G)) {

			pages++;

			set_pte((pte_t *)pud,

				pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
@@ -433,7 +437,7 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end) 
		pmd = alloc_low_page(&pmd_phys);



		spin_lock(&init_mm.page_table_lock);

		last_map_addr = phys_pmd_init(pmd, addr, end);

		last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask);

		unmap_low_page(pmd);

		pud_populate(&init_mm, pud, __va(pmd_phys));

		spin_unlock(&init_mm.page_table_lock);
@@ -446,13 +450,14 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end) 
}



static unsigned long __meminit

phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end)

phys_pud_update(pgd_t *pgd, unsigned long addr, unsigned long end,

		 unsigned long page_size_mask)

{

	pud_t *pud;



	pud = (pud_t *)pgd_page_vaddr(*pgd);



	return phys_pud_init(pud, addr, end);

	return phys_pud_init(pud, addr, end, page_size_mask);

}



static void __init find_early_table_space(unsigned long end)
@@ -608,29 +613,12 @@ static void __init early_memtest(unsigned long start, unsigned long end) 
}

#endif



/*

 * Setup the direct mapping of the physical memory at PAGE_OFFSET.

 * This runs before bootmem is initialized and gets pages directly from

 * the physical memory. To access them they are temporarily mapped.

 */

unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned long end)

static unsigned long __init kernel_physical_mapping_init(unsigned long start,

						unsigned long end,

						unsigned long page_size_mask)

{

	unsigned long next, last_map_addr = end;

	unsigned long start_phys = start, end_phys = end;



	printk(KERN_INFO "init_memory_mapping\n");



	/*

	 * Find space for the kernel direct mapping tables.

	 *

	 * Later we should allocate these tables in the local node of the

	 * memory mapped. Unfortunately this is done currently before the

	 * nodes are discovered.

	 */

	if (!after_bootmem) {

		init_gbpages();

		find_early_table_space(end);

	}

	unsigned long next, last_map_addr = end;



	start = (unsigned long)__va(start);

	end = (unsigned long)__va(end);
@@ -645,7 +633,8 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned lon 
			next = end;



		if (pgd_val(*pgd)) {

			last_map_addr = phys_pud_update(pgd, __pa(start), __pa(end));

			last_map_addr = phys_pud_update(pgd, __pa(start),

						 __pa(end), page_size_mask);

			continue;

		}
@@ -654,22 +643,61 @@ unsigned long __init_refok init_memory_mapping(unsigned long start, unsigned lon 
		else

			pud = alloc_low_page(&pud_phys);



		last_map_addr = phys_pud_init(pud, __pa(start), __pa(next));

		last_map_addr = phys_pud_init(pud, __pa(start), __pa(next),

						 page_size_mask);

		unmap_low_page(pud);

		pgd_populate(&init_mm, pgd_offset_k(start),

			     __va(pud_phys));

	}



	return last_map_addr;

}

/*

 * Setup the direct mapping of the physical memory at PAGE_OFFSET.

 * This runs before bootmem is initialized and gets pages directly from

 * the physical memory. To access them they are temporarily mapped.

 */

unsigned long __init_refok init_memory_mapping(unsigned long start,

					       unsigned long end)

{

	unsigned long last_map_addr;

	unsigned long page_size_mask = 0;



	printk(KERN_INFO "init_memory_mapping\n");



	/*

	 * Find space for the kernel direct mapping tables.

	 *

	 * Later we should allocate these tables in the local node of the

	 * memory mapped. Unfortunately this is done currently before the

	 * nodes are discovered.

	 */

	if (!after_bootmem) {

		init_gbpages();

		find_early_table_space(end);

	}



	if (direct_gbpages)

		page_size_mask |= 1 << PG_LEVEL_1G;

	if (cpu_has_pse)

		page_size_mask |= 1 << PG_LEVEL_2M;



	last_map_addr = kernel_physical_mapping_init(start, end,

							 page_size_mask);



	if (!after_bootmem)

		mmu_cr4_features = read_cr4();

	__flush_tlb_all();



	if (!after_bootmem)

	if (!after_bootmem && table_end > table_start)

		reserve_early(table_start << PAGE_SHIFT,

				 table_end << PAGE_SHIFT, "PGTABLE");



	printk(KERN_INFO "last_map_addr: %lx end: %lx\n",

			 last_map_addr, end);



	if (!after_bootmem)

		early_memtest(start_phys, end_phys);

		early_memtest(start, end);



	return last_map_addr >> PAGE_SHIFT;

}