diff options
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/include/asm/page.h | 13 | ||||
| -rw-r--r-- | arch/parisc/include/asm/pgtable.h | 15 | ||||
| -rw-r--r-- | arch/parisc/mm/init.c | 7 |
3 files changed, 19 insertions, 16 deletions
diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h index c3941f09a87..7bc5125d7d4 100644 --- a/arch/parisc/include/asm/page.h +++ b/arch/parisc/include/asm/page.h @@ -36,16 +36,7 @@ void clear_user_page(void *page, unsigned long vaddr, struct page *pg); */ #define STRICT_MM_TYPECHECKS #ifdef STRICT_MM_TYPECHECKS -typedef struct { unsigned long pte; -#if !defined(CONFIG_64BIT) - unsigned long future_flags; - /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY - to 2, but then strangely the identical 32bit kernel boots on a - c3000(pa20), but not any longer on a 715(pa11). - Still investigating... HelgeD. - */ -#endif -} pte_t; /* either 32 or 64bit */ +typedef struct { unsigned long pte; } pte_t; /* either 32 or 64bit */ /* NOTE: even on 64 bits, these entries are __u32 because we allocate * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */ @@ -111,7 +102,7 @@ extern int npmem_ranges; #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY 2 #else -#define BITS_PER_PTE_ENTRY 3 +#define BITS_PER_PTE_ENTRY 2 #define BITS_PER_PMD_ENTRY 2 #define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY #endif diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index 470a4b88124..a27d2e200fb 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -50,11 +50,7 @@ printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, (unsigned long)pgd_val(e)) /* This is the size of the initially mapped kernel memory */ -#ifdef CONFIG_64BIT #define KERNEL_INITIAL_ORDER 24 /* 0 to 1<<24 = 16MB */ -#else -#define KERNEL_INITIAL_ORDER 23 /* 0 to 1<<23 = 8MB */ -#endif #define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER) #if defined(CONFIG_64BIT) && defined(CONFIG_PARISC_PAGE_SIZE_4KB) @@ -91,16 +87,25 @@ /* Definitions for 1st level */ #define PGDIR_SHIFT (PMD_SHIFT + BITS_PER_PMD) +#if (PGDIR_SHIFT + PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) > BITS_PER_LONG +#define BITS_PER_PGD (BITS_PER_LONG - PGDIR_SHIFT) +#else #define BITS_PER_PGD (PAGE_SHIFT + PGD_ORDER - BITS_PER_PGD_ENTRY) +#endif #define PGDIR_SIZE (1UL << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) #define PTRS_PER_PGD (1UL << BITS_PER_PGD) #define USER_PTRS_PER_PGD PTRS_PER_PGD +#ifdef CONFIG_64BIT #define MAX_ADDRBITS (PGDIR_SHIFT + BITS_PER_PGD) #define MAX_ADDRESS (1UL << MAX_ADDRBITS) - #define SPACEID_SHIFT (MAX_ADDRBITS - 32) +#else +#define MAX_ADDRBITS (BITS_PER_LONG) +#define MAX_ADDRESS (1UL << MAX_ADDRBITS) +#define SPACEID_SHIFT 0 +#endif /* This calculates the number of initial pages we need for the initial * page tables */ diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 9d704d9831d..4356ceb1e36 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -456,6 +456,13 @@ void __init mem_init(void) { int codesize, reservedpages, datasize, initsize; + /* Do sanity checks on page table constants */ + BUILD_BUG_ON(PTE_ENTRY_SIZE != sizeof(pte_t)); + BUILD_BUG_ON(PMD_ENTRY_SIZE != sizeof(pmd_t)); + BUILD_BUG_ON(PGD_ENTRY_SIZE != sizeof(pgd_t)); + BUILD_BUG_ON(PAGE_SHIFT + BITS_PER_PTE + BITS_PER_PMD + BITS_PER_PGD + > BITS_PER_LONG); + high_memory = __va((max_pfn << PAGE_SHIFT)); #ifndef CONFIG_DISCONTIGMEM |