diff options
Diffstat (limited to 'arch/parisc/include')
| -rw-r--r-- | arch/parisc/include/asm/compat.h | 2 | ||||
| -rw-r--r-- | arch/parisc/include/asm/io.h | 2 | ||||
| -rw-r--r-- | arch/parisc/include/asm/mmu_context.h | 7 | ||||
| -rw-r--r-- | arch/parisc/include/asm/page.h | 2 | ||||
| -rw-r--r-- | arch/parisc/include/asm/pgalloc.h | 76 | ||||
| -rw-r--r-- | arch/parisc/include/asm/pgtable.h | 89 |
6 files changed, 47 insertions, 131 deletions
diff --git a/arch/parisc/include/asm/compat.h b/arch/parisc/include/asm/compat.h index 8f33085ff1bd..1a609d38f667 100644 --- a/arch/parisc/include/asm/compat.h +++ b/arch/parisc/include/asm/compat.h @@ -179,7 +179,7 @@ static __inline__ void __user *arch_compat_alloc_user_space(long len) static inline int __is_compat_task(struct task_struct *t) { - return test_ti_thread_flag(task_thread_info(t), TIF_32BIT); + return test_tsk_thread_flag(t, TIF_32BIT); } static inline int is_compat_task(void) diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h index 45e20d38dc59..8a11b8cf4719 100644 --- a/arch/parisc/include/asm/io.h +++ b/arch/parisc/include/asm/io.h @@ -321,4 +321,6 @@ extern void iowrite64be(u64 val, void __iomem *addr); */ #define xlate_dev_kmem_ptr(p) p +extern int devmem_is_allowed(unsigned long pfn); + #endif diff --git a/arch/parisc/include/asm/mmu_context.h b/arch/parisc/include/asm/mmu_context.h index 46f8c22c5977..726257648d9f 100644 --- a/arch/parisc/include/asm/mmu_context.h +++ b/arch/parisc/include/asm/mmu_context.h @@ -5,6 +5,7 @@ #include <linux/mm.h> #include <linux/sched.h> #include <linux/atomic.h> +#include <linux/spinlock.h> #include <asm-generic/mm_hooks.h> /* on PA-RISC, we actually have enough contexts to justify an allocator @@ -50,6 +51,12 @@ static inline void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { if (prev != next) { +#ifdef CONFIG_TLB_PTLOCK + /* put physical address of page_table_lock in cr28 (tr4) + for TLB faults */ + spinlock_t *pgd_lock = &next->page_table_lock; + mtctl(__pa(__ldcw_align(&pgd_lock->rlock.raw_lock)), 28); +#endif mtctl(__pa(next->pgd), 25); load_context(next->context); } diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h index 6b3f6740a6a6..d00313d1274e 100644 --- a/arch/parisc/include/asm/page.h +++ b/arch/parisc/include/asm/page.h @@ -112,7 +112,7 @@ extern int npmem_ranges; #else #define BITS_PER_PTE_ENTRY 2 #define BITS_PER_PMD_ENTRY 2 -#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY +#define BITS_PER_PGD_ENTRY 2 #endif #define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY) #define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY) diff --git a/arch/parisc/include/asm/pgalloc.h b/arch/parisc/include/asm/pgalloc.h index a6482b2ce0ea..dda557085311 100644 --- a/arch/parisc/include/asm/pgalloc.h +++ b/arch/parisc/include/asm/pgalloc.h @@ -15,47 +15,23 @@ #define __HAVE_ARCH_PGD_FREE #include <asm-generic/pgalloc.h> -/* Allocate the top level pgd (page directory) - * - * Here (for 64 bit kernels) we implement a Hybrid L2/L3 scheme: we - * allocate the first pmd adjacent to the pgd. This means that we can - * subtract a constant offset to get to it. The pmd and pgd sizes are - * arranged so that a single pmd covers 4GB (giving a full 64-bit - * process access to 8TB) so our lookups are effectively L2 for the - * first 4GB of the kernel (i.e. for all ILP32 processes and all the - * kernel for machines with under 4GB of memory) */ +/* Allocate the top level pgd (page directory) */ static inline pgd_t *pgd_alloc(struct mm_struct *mm) { - pgd_t *pgd = (pgd_t *)__get_free_pages(GFP_KERNEL, - PGD_ALLOC_ORDER); - pgd_t *actual_pgd = pgd; + pgd_t *pgd; - if (likely(pgd != NULL)) { - memset(pgd, 0, PAGE_SIZE<<PGD_ALLOC_ORDER); -#if CONFIG_PGTABLE_LEVELS == 3 - actual_pgd += PTRS_PER_PGD; - /* Populate first pmd with allocated memory. We mark it - * with PxD_FLAG_ATTACHED as a signal to the system that this - * pmd entry may not be cleared. */ - set_pgd(actual_pgd, __pgd((PxD_FLAG_PRESENT | - PxD_FLAG_VALID | - PxD_FLAG_ATTACHED) - + (__u32)(__pa((unsigned long)pgd) >> PxD_VALUE_SHIFT))); - /* The first pmd entry also is marked with PxD_FLAG_ATTACHED as - * a signal that this pmd may not be freed */ - set_pgd(pgd, __pgd(PxD_FLAG_ATTACHED)); -#endif - } - spin_lock_init(pgd_spinlock(actual_pgd)); - return actual_pgd; + pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER); + if (unlikely(pgd == NULL)) + return NULL; + + memset(pgd, 0, PAGE_SIZE << PGD_ORDER); + + return pgd; } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { -#if CONFIG_PGTABLE_LEVELS == 3 - pgd -= PTRS_PER_PGD; -#endif - free_pages((unsigned long)pgd, PGD_ALLOC_ORDER); + free_pages((unsigned long)pgd, PGD_ORDER); } #if CONFIG_PGTABLE_LEVELS == 3 @@ -70,41 +46,25 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) { - return (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_ORDER); + pmd_t *pmd; + + pmd = (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_ORDER); + if (likely(pmd)) + memset ((void *)pmd, 0, PAGE_SIZE << PMD_ORDER); + return pmd; } static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd) { - if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED) { - /* - * This is the permanent pmd attached to the pgd; - * cannot free it. - * Increment the counter to compensate for the decrement - * done by generic mm code. - */ - mm_inc_nr_pmds(mm); - return; - } free_pages((unsigned long)pmd, PMD_ORDER); } - #endif static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte) { -#if CONFIG_PGTABLE_LEVELS == 3 - /* preserve the gateway marker if this is the beginning of - * the permanent pmd */ - if(pmd_flag(*pmd) & PxD_FLAG_ATTACHED) - set_pmd(pmd, __pmd((PxD_FLAG_PRESENT | - PxD_FLAG_VALID | - PxD_FLAG_ATTACHED) - + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT))); - else -#endif - set_pmd(pmd, __pmd((PxD_FLAG_PRESENT | PxD_FLAG_VALID) - + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT))); + set_pmd(pmd, __pmd((PxD_FLAG_PRESENT | PxD_FLAG_VALID) + + (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT))); } #define pmd_populate(mm, pmd, pte_page) \ diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index 75cf84070fc9..39017210dbf0 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -23,8 +23,6 @@ #include <asm/processor.h> #include <asm/cache.h> -static inline spinlock_t *pgd_spinlock(pgd_t *); - /* * kern_addr_valid(ADDR) tests if ADDR is pointing to valid kernel * memory. For the return value to be meaningful, ADDR must be >= @@ -42,12 +40,8 @@ static inline spinlock_t *pgd_spinlock(pgd_t *); /* This is for the serialization of PxTLB broadcasts. At least on the N class * systems, only one PxTLB inter processor broadcast can be active at any one - * time on the Merced bus. - - * PTE updates are protected by locks in the PMD. - */ + * time on the Merced bus. */ extern spinlock_t pa_tlb_flush_lock; -extern spinlock_t pa_swapper_pg_lock; #if defined(CONFIG_64BIT) && defined(CONFIG_SMP) extern int pa_serialize_tlb_flushes; #else @@ -86,18 +80,16 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) * within a page table are directly modified. Thus, the following * hook is made available. */ -#define set_pte(pteptr, pteval) \ - do{ \ - *(pteptr) = (pteval); \ - } while(0) - -#define set_pte_at(mm, addr, ptep, pteval) \ - do { \ - unsigned long flags; \ - spin_lock_irqsave(pgd_spinlock((mm)->pgd), flags);\ - set_pte(ptep, pteval); \ - purge_tlb_entries(mm, addr); \ - spin_unlock_irqrestore(pgd_spinlock((mm)->pgd), flags);\ +#define set_pte(pteptr, pteval) \ + do { \ + *(pteptr) = (pteval); \ + barrier(); \ + } while(0) + +#define set_pte_at(mm, addr, pteptr, pteval) \ + do { \ + *(pteptr) = (pteval); \ + purge_tlb_entries(mm, addr); \ } while (0) #endif /* !__ASSEMBLY__ */ @@ -120,12 +112,10 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) #define KERNEL_INITIAL_SIZE (1 << KERNEL_INITIAL_ORDER) #if CONFIG_PGTABLE_LEVELS == 3 -#define PGD_ORDER 1 /* Number of pages per pgd */ -#define PMD_ORDER 1 /* Number of pages per pmd */ -#define PGD_ALLOC_ORDER (2 + 1) /* first pgd contains pmd */ +#define PMD_ORDER 1 +#define PGD_ORDER 0 #else -#define PGD_ORDER 1 /* Number of pages per pgd */ -#define PGD_ALLOC_ORDER (PGD_ORDER + 1) +#define PGD_ORDER 1 #endif /* Definitions for 3rd level (we use PLD here for Page Lower directory @@ -240,11 +230,9 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) * able to effectively address 40/42/44-bits of physical address space * depending on 4k/16k/64k PAGE_SIZE */ #define _PxD_PRESENT_BIT 31 -#define _PxD_ATTACHED_BIT 30 -#define _PxD_VALID_BIT 29 +#define _PxD_VALID_BIT 30 #define PxD_FLAG_PRESENT (1 << xlate_pabit(_PxD_PRESENT_BIT)) -#define PxD_FLAG_ATTACHED (1 << xlate_pabit(_PxD_ATTACHED_BIT)) #define PxD_FLAG_VALID (1 << xlate_pabit(_PxD_VALID_BIT)) #define PxD_FLAG_MASK (0xf) #define PxD_FLAG_SHIFT (4) @@ -326,23 +314,10 @@ extern unsigned long *empty_zero_page; #define pgd_flag(x) (pgd_val(x) & PxD_FLAG_MASK) #define pgd_address(x) ((unsigned long)(pgd_val(x) &~ PxD_FLAG_MASK) << PxD_VALUE_SHIFT) -#if CONFIG_PGTABLE_LEVELS == 3 -/* The first entry of the permanent pmd is not there if it contains - * the gateway marker */ -#define pmd_none(x) (!pmd_val(x) || pmd_flag(x) == PxD_FLAG_ATTACHED) -#else #define pmd_none(x) (!pmd_val(x)) -#endif #define pmd_bad(x) (!(pmd_flag(x) & PxD_FLAG_VALID)) #define pmd_present(x) (pmd_flag(x) & PxD_FLAG_PRESENT) static inline void pmd_clear(pmd_t *pmd) { -#if CONFIG_PGTABLE_LEVELS == 3 - if (pmd_flag(*pmd) & PxD_FLAG_ATTACHED) - /* This is the entry pointing to the permanent pmd - * attached to the pgd; cannot clear it */ - set_pmd(pmd, __pmd(PxD_FLAG_ATTACHED)); - else -#endif set_pmd(pmd, __pmd(0)); } @@ -358,12 +333,6 @@ static inline void pmd_clear(pmd_t *pmd) { #define pud_bad(x) (!(pud_flag(x) & PxD_FLAG_VALID)) #define pud_present(x) (pud_flag(x) & PxD_FLAG_PRESENT) static inline void pud_clear(pud_t *pud) { -#if CONFIG_PGTABLE_LEVELS == 3 - if(pud_flag(*pud) & PxD_FLAG_ATTACHED) - /* This is the permanent pmd attached to the pud; cannot - * free it */ - return; -#endif set_pud(pud, __pud(0)); } #endif @@ -456,32 +425,18 @@ extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) - -static inline spinlock_t *pgd_spinlock(pgd_t *pgd) -{ - if (unlikely(pgd == swapper_pg_dir)) - return &pa_swapper_pg_lock; - return (spinlock_t *)((char *)pgd + (PAGE_SIZE << (PGD_ALLOC_ORDER - 1))); -} - - static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { pte_t pte; - unsigned long flags; if (!pte_young(*ptep)) return 0; - spin_lock_irqsave(pgd_spinlock(vma->vm_mm->pgd), flags); pte = *ptep; if (!pte_young(pte)) { - spin_unlock_irqrestore(pgd_spinlock(vma->vm_mm->pgd), flags); return 0; } - set_pte(ptep, pte_mkold(pte)); - purge_tlb_entries(vma->vm_mm, addr); - spin_unlock_irqrestore(pgd_spinlock(vma->vm_mm->pgd), flags); + set_pte_at(vma->vm_mm, addr, ptep, pte_mkold(pte)); return 1; } @@ -489,24 +444,16 @@ struct mm_struct; static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { pte_t old_pte; - unsigned long flags; - spin_lock_irqsave(pgd_spinlock(mm->pgd), flags); old_pte = *ptep; - set_pte(ptep, __pte(0)); - purge_tlb_entries(mm, addr); - spin_unlock_irqrestore(pgd_spinlock(mm->pgd), flags); + set_pte_at(mm, addr, ptep, __pte(0)); return old_pte; } static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { - unsigned long flags; - spin_lock_irqsave(pgd_spinlock(mm->pgd), flags); - set_pte(ptep, pte_wrprotect(*ptep)); - purge_tlb_entries(mm, addr); - spin_unlock_irqrestore(pgd_spinlock(mm->pgd), flags); + set_pte_at(mm, addr, ptep, pte_wrprotect(*ptep)); } #define pte_same(A,B) (pte_val(A) == pte_val(B)) |