Commit 7a7039ee authored by Chris Metcalf's avatar Chris Metcalf
Browse files

arch/tile: fix bug in loading kernels larger than 16 MB 



Previously we only handled kernels up to a single huge page in size.
Now we create additional PTEs appropriately.

Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
parent b230ff2d

arch/tile/mm/init.c

+15 −6
Original line number Original line Diff line number Diff line
@@ -557,6 +557,7 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) 




	address = MEM_SV_INTRPT;

	address = MEM_SV_INTRPT;

	pmd = get_pmd(pgtables, address);

	pmd = get_pmd(pgtables, address);

	pfn = 0;  /* code starts at PA 0 */

	if (ktext_small) {

	if (ktext_small) {

		/* Allocate an L2 PTE for the kernel text */

		/* Allocate an L2 PTE for the kernel text */

		int cpu = 0;

		int cpu = 0;
@@ -579,10 +580,15 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) 
		}

		}





		BUG_ON(address != (unsigned long)_stext);

		BUG_ON(address != (unsigned long)_stext);

		pfn = 0;  /* code starts at PA 0 */

		pte = NULL;

		for (; address < (unsigned long)_einittext;

		     pfn++, address += PAGE_SIZE) {

			pte_ofs = pte_index(address);

			if (pte_ofs == 0) {

				if (pte)

					assign_pte(pmd++, pte);

				pte = alloc_pte();

				pte = alloc_pte();

		for (pte_ofs = 0; address < (unsigned long)_einittext;

			}

		     pfn++, pte_ofs++, address += PAGE_SIZE) {

			if (!ktext_local) {

			if (!ktext_local) {

				prot = set_remote_cache_cpu(prot, cpu);

				prot = set_remote_cache_cpu(prot, cpu);

				cpu = cpumask_next(cpu, &ktext_mask);

				cpu = cpumask_next(cpu, &ktext_mask);
@@ -591,6 +597,7 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) 
			}

			}

			pte[pte_ofs] = pfn_pte(pfn, prot);

			pte[pte_ofs] = pfn_pte(pfn, prot);

		}

		}

		if (pte)

			assign_pte(pmd, pte);

			assign_pte(pmd, pte);

	} else {

	} else {

		pte_t pteval = pfn_pte(0, PAGE_KERNEL_EXEC);

		pte_t pteval = pfn_pte(0, PAGE_KERNEL_EXEC);
@@ -614,7 +621,9 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base) 
		else

		else

			pteval = hv_pte_set_mode(pteval,

			pteval = hv_pte_set_mode(pteval,

						 HV_PTE_MODE_CACHE_NO_L3);

						 HV_PTE_MODE_CACHE_NO_L3);

		*(pte_t *)pmd = pteval;

		for (; address < (unsigned long)_einittext;

		     pfn += PFN_DOWN(HPAGE_SIZE), address += HPAGE_SIZE)

			*(pte_t *)(pmd++) = pfn_pte(pfn, pteval);

	}

	}





	/* Set swapper_pgprot here so it is flushed to memory right away. */

	/* Set swapper_pgprot here so it is flushed to memory right away. */