diff options
Diffstat (limited to 'arch/s390/mm/init.c')
| -rw-r--r-- | arch/s390/mm/init.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 3a25bbf2eb0..b234bb4a6da 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -81,6 +81,7 @@ void show_mem(void) static void __init setup_ro_region(void) { pgd_t *pgd; + pud_t *pud; pmd_t *pmd; pte_t *pte; pte_t new_pte; @@ -91,7 +92,8 @@ static void __init setup_ro_region(void) for (; address < end; address += PAGE_SIZE) { pgd = pgd_offset_k(address); - pmd = pmd_offset(pgd, address); + pud = pud_offset(pgd, address); + pmd = pmd_offset(pud, address); pte = pte_offset_kernel(pmd, address); new_pte = mk_pte_phys(address, __pgprot(_PAGE_RO)); *pte = new_pte; @@ -103,32 +105,28 @@ static void __init setup_ro_region(void) */ void __init paging_init(void) { - pgd_t *pg_dir; - int i; - unsigned long pgdir_k; static const int ssm_mask = 0x04000000L; unsigned long max_zone_pfns[MAX_NR_ZONES]; + unsigned long pgd_type; - pg_dir = swapper_pg_dir; - + init_mm.pgd = swapper_pg_dir; + S390_lowcore.kernel_asce = __pa(init_mm.pgd) & PAGE_MASK; #ifdef CONFIG_64BIT - pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERN_REGION_TABLE; - for (i = 0; i < PTRS_PER_PGD; i++) - pgd_clear_kernel(pg_dir + i); + S390_lowcore.kernel_asce |= _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH; + pgd_type = _REGION3_ENTRY_EMPTY; #else - pgdir_k = (__pa(swapper_pg_dir) & PAGE_MASK) | _KERNSEG_TABLE; - for (i = 0; i < PTRS_PER_PGD; i++) - pmd_clear_kernel((pmd_t *)(pg_dir + i)); + S390_lowcore.kernel_asce |= _ASCE_TABLE_LENGTH; + pgd_type = _SEGMENT_ENTRY_EMPTY; #endif + clear_table((unsigned long *) init_mm.pgd, pgd_type, + sizeof(unsigned long)*2048); vmem_map_init(); setup_ro_region(); - S390_lowcore.kernel_asce = pgdir_k; - /* enable virtual mapping in kernel mode */ - __ctl_load(pgdir_k, 1, 1); - __ctl_load(pgdir_k, 7, 7); - __ctl_load(pgdir_k, 13, 13); + __ctl_load(S390_lowcore.kernel_asce, 1, 1); + __ctl_load(S390_lowcore.kernel_asce, 7, 7); + __ctl_load(S390_lowcore.kernel_asce, 13, 13); __raw_local_irq_ssm(ssm_mask); memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |