diff options
Diffstat (limited to 'arch/m68k/include/asm/mmu_context.h')
| -rw-r--r-- | arch/m68k/include/asm/mmu_context.h | 63 |
1 files changed, 29 insertions, 34 deletions
diff --git a/arch/m68k/include/asm/mmu_context.h b/arch/m68k/include/asm/mmu_context.h index dc3be991d634..141bbdfad960 100644 --- a/arch/m68k/include/asm/mmu_context.h +++ b/arch/m68k/include/asm/mmu_context.h @@ -1,11 +1,9 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __M68K_MMU_CONTEXT_H #define __M68K_MMU_CONTEXT_H #include <asm-generic/mm_hooks.h> - -static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) -{ -} +#include <linux/mm_types.h> #ifdef CONFIG_MMU @@ -33,7 +31,7 @@ static inline void get_mmu_context(struct mm_struct *mm) if (mm->context != NO_CONTEXT) return; - while (atomic_dec_and_test_lt(&nr_free_contexts)) { + while (arch_atomic_dec_and_test_lt(&nr_free_contexts)) { atomic_inc(&nr_free_contexts); steal_context(); } @@ -56,6 +54,7 @@ static inline void get_mmu_context(struct mm_struct *mm) /* * We're finished using the context for an address space. */ +#define destroy_context destroy_context static inline void destroy_context(struct mm_struct *mm) { if (mm->context != NO_CONTEXT) { @@ -81,6 +80,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, * After we have set current->mm to a new value, this activates * the context for the new mm so we see the new mappings. */ +#define activate_mm activate_mm static inline void activate_mm(struct mm_struct *active_mm, struct mm_struct *mm) { @@ -88,9 +88,6 @@ static inline void activate_mm(struct mm_struct *active_mm, set_context(mm->context, mm->pgd); } -#define deactivate_mm(tsk, mm) do { } while (0) - -extern void mmu_context_init(void); #define prepare_arch_switch(next) load_ksp_mmu(next) static inline void load_ksp_mmu(struct task_struct *task) @@ -99,8 +96,10 @@ static inline void load_ksp_mmu(struct task_struct *task) struct mm_struct *mm; int asid; pgd_t *pgd; + p4d_t *p4d; + pud_t *pud; pmd_t *pmd; - pte_t *pte; + pte_t *pte = NULL; unsigned long mmuar; local_irq_save(flags); @@ -126,13 +125,21 @@ static inline void load_ksp_mmu(struct task_struct *task) if (pgd_none(*pgd)) goto bug; - pmd = pmd_offset(pgd, mmuar); + p4d = p4d_offset(pgd, mmuar); + if (p4d_none(*p4d)) + goto bug; + + pud = pud_offset(p4d, mmuar); + if (pud_none(*pud)) + goto bug; + + pmd = pmd_offset(pud, mmuar); if (pmd_none(*pmd)) goto bug; pte = (mmuar >= PAGE_OFFSET) ? pte_offset_kernel(pmd, mmuar) : pte_offset_map(pmd, mmuar); - if (pte_none(*pte) || !pte_present(*pte)) + if (!pte || pte_none(*pte) || !pte_present(*pte)) goto bug; set_pte(pte, pte_mkyoung(*pte)); @@ -154,6 +161,8 @@ static inline void load_ksp_mmu(struct task_struct *task) bug: pr_info("ksp load failed: mm=0x%p ksp=0x08%lx\n", mm, mmuar); end: + if (pte && mmuar < PAGE_OFFSET) + pte_unmap(pte); local_irq_restore(flags); } @@ -165,6 +174,7 @@ extern unsigned long get_free_context(struct mm_struct *mm); extern void clear_context(unsigned long context); /* set the context for a new task to unmapped */ +#define init_new_context init_new_context static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { @@ -181,6 +191,7 @@ static inline void get_mmu_context(struct mm_struct *mm) } /* flush context if allocated... */ +#define destroy_context destroy_context static inline void destroy_context(struct mm_struct *mm) { if (mm->context != SUN3_INVALID_CONTEXT) @@ -199,8 +210,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, activate_context(tsk->mm); } -#define deactivate_mm(tsk, mm) do { } while (0) - +#define activate_mm activate_mm static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm) { @@ -211,8 +221,9 @@ static inline void activate_mm(struct mm_struct *prev_mm, #include <asm/setup.h> #include <asm/page.h> -#include <asm/pgalloc.h> +#include <asm/cacheflush.h> +#define init_new_context init_new_context static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { @@ -220,8 +231,6 @@ static inline int init_new_context(struct task_struct *tsk, return 0; } -#define destroy_context(mm) do { } while(0) - static inline void switch_mm_0230(struct mm_struct *mm) { unsigned long crp[2] = { @@ -289,8 +298,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, str } } -#define deactivate_mm(tsk,mm) do { } while (0) - +#define activate_mm activate_mm static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm) { @@ -304,24 +312,11 @@ static inline void activate_mm(struct mm_struct *prev_mm, #endif -#else /* !CONFIG_MMU */ - -static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) -{ - return 0; -} - - -static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) -{ -} +#include <asm-generic/mmu_context.h> -#define destroy_context(mm) do { } while (0) -#define deactivate_mm(tsk,mm) do { } while (0) +#else /* !CONFIG_MMU */ -static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm) -{ -} +#include <asm-generic/nommu_context.h> #endif /* CONFIG_MMU */ #endif /* __M68K_MMU_CONTEXT_H */ |