/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __M68K_MMU_CONTEXT_H #define __M68K_MMU_CONTEXT_H #include <asm-generic/mm_hooks.h> #include <linux/mm_types.h> static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { } #ifdef CONFIG_MMU #if defined(CONFIG_COLDFIRE) #include <asm/atomic.h> #include <asm/bitops.h> #include <asm/mcfmmu.h> #include <asm/mmu.h> #define NO_CONTEXT 256 #define LAST_CONTEXT 255 #define FIRST_CONTEXT 1 extern unsigned long context_map[]; extern mm_context_t next_mmu_context; extern atomic_t nr_free_contexts; extern struct mm_struct *context_mm[LAST_CONTEXT+1]; extern void steal_context(void); static inline void get_mmu_context(struct mm_struct *mm) { mm_context_t ctx; if (mm->context != NO_CONTEXT) return; while (atomic_dec_and_test_lt(&nr_free_contexts)) { atomic_inc(&nr_free_contexts); steal_context(); } ctx = next_mmu_context; while (test_and_set_bit(ctx, context_map)) { ctx = find_next_zero_bit(context_map, LAST_CONTEXT+1, ctx); if (ctx > LAST_CONTEXT) ctx = 0; } next_mmu_context = (ctx + 1) & LAST_CONTEXT; mm->context = ctx; context_mm[ctx] = mm; } /* * Set up the context for a new address space. */ #define init_new_context(tsk, mm) (((mm)->context = NO_CONTEXT), 0) /* * We're finished using the context for an address space. */ static inline void destroy_context(struct mm_struct *mm) { if (mm->context != NO_CONTEXT) { clear_bit(mm->context, context_map); mm->context = NO_CONTEXT; atomic_inc(&nr_free_contexts); } } static inline void set_context(mm_context_t context, pgd_t *pgd) { __asm__ __volatile__ ("movec %0,%%asid" : : "d" (context)); } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { get_mmu_context(tsk->mm); set_context(tsk->mm->context, next->pgd); } /* * After we have set current->mm to a new value, this activates * the context for the new mm so we see the new mappings. */ static inline void activate_mm(struct mm_struct *active_mm, struct mm_struct *mm) { get_mmu_context(mm); set_context(mm->context, mm->pgd); } #define deactivate_mm(tsk, mm) do { } while (0) #define prepare_arch_switch(next) load_ksp_mmu(next) static inline void load_ksp_mmu(struct task_struct *task) { unsigned long flags; struct mm_struct *mm; int asid; pgd_t *pgd; pmd_t *pmd; pte_t *pte; unsigned long mmuar; local_irq_save(flags); mmuar = task->thread.ksp; /* Search for a valid TLB entry, if one is found, don't remap */ mmu_write(MMUAR, mmuar); mmu_write(MMUOR, MMUOR_STLB | MMUOR_ADR); if (mmu_read(MMUSR) & MMUSR_HIT) goto end; if (mmuar >= PAGE_OFFSET) { mm = &init_mm; } else { pr_info("load_ksp_mmu: non-kernel mm found: 0x%p\n", task->mm); mm = task->mm; } if (!mm) goto bug; pgd = pgd_offset(mm, mmuar); if (pgd_none(*pgd)) goto bug; pmd = pmd_offset(pgd, 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)) goto bug; set_pte(pte, pte_mkyoung(*pte)); asid = mm->context & 0xff; if (!pte_dirty(*pte) && mmuar <= PAGE_OFFSET) set_pte(pte, pte_wrprotect(*pte)); mmu_write(MMUTR, (mmuar & PAGE_MASK) | (asid << MMUTR_IDN) | (((int)(pte->pte) & (int)CF_PAGE_MMUTR_MASK) >> CF_PAGE_MMUTR_SHIFT) | MMUTR_V); mmu_write(MMUDR, (pte_val(*pte) & PAGE_MASK) | ((pte->pte) & CF_PAGE_MMUDR_MASK) | MMUDR_SZ_8KB | MMUDR_X); mmu_write(MMUOR, MMUOR_ACC | MMUOR_UAA); goto end; bug: pr_info("ksp load failed: mm=0x%p ksp=0x08%lx\n", mm, mmuar); end: local_irq_restore(flags); } #elif defined(CONFIG_SUN3) #include <asm/sun3mmu.h> #include <linux/sched.h> 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 */ static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { mm->context = SUN3_INVALID_CONTEXT; return 0; } /* find the context given to this process, and if it hasn't already got one, go get one for it. */ static inline void get_mmu_context(struct mm_struct *mm) { if (mm->context == SUN3_INVALID_CONTEXT) mm->context = get_free_context(mm); } /* flush context if allocated... */ static inline void destroy_context(struct mm_struct *mm) { if (mm->context != SUN3_INVALID_CONTEXT) clear_context(mm->context); } static inline void activate_context(struct mm_struct *mm) { get_mmu_context(mm); sun3_put_context(mm->context); } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { activate_context(tsk->mm); } #define deactivate_mm(tsk, mm) do { } while (0) static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm) { activate_context(next_mm); } #else #include <asm/setup.h> #include <asm/page.h> #include <asm/pgalloc.h> static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { mm->context = virt_to_phys(mm->pgd); return 0; } #define destroy_context(mm) do { } while(0) static inline void switch_mm_0230(struct mm_struct *mm) { unsigned long crp[2] = { 0x80000000 | _PAGE_TABLE, mm->context }; unsigned long tmp; asm volatile (".chip 68030"); /* flush MC68030/MC68020 caches (they are virtually addressed) */ asm volatile ( "movec %%cacr,%0;" "orw %1,%0; " "movec %0,%%cacr" : "=d" (tmp) : "di" (FLUSH_I_AND_D)); /* Switch the root pointer. For a 030-only kernel, * avoid flushing the whole ATC, we only need to * flush the user entries. The 68851 does this by * itself. Avoid a runtime check here. */ asm volatile ( #ifdef CPU_M68030_ONLY "pmovefd %0,%%crp; " "pflush #0,#4" #else "pmove %0,%%crp" #endif : : "m" (crp[0])); asm volatile (".chip 68k"); } static inline void switch_mm_0460(struct mm_struct *mm) { asm volatile (".chip 68040"); /* flush address translation cache (user entries) */ asm volatile ("pflushan"); /* switch the root pointer */ asm volatile ("movec %0,%%urp" : : "r" (mm->context)); if (CPU_IS_060) { unsigned long tmp; /* clear user entries in the branch cache */ asm volatile ( "movec %%cacr,%0; " "orl %1,%0; " "movec %0,%%cacr" : "=d" (tmp): "di" (0x00200000)); } asm volatile (".chip 68k"); } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { if (prev != next) { if (CPU_IS_020_OR_030) switch_mm_0230(next); else switch_mm_0460(next); } } #define deactivate_mm(tsk,mm) do { } while (0) static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm) { next_mm->context = virt_to_phys(next_mm->pgd); if (CPU_IS_020_OR_030) switch_mm_0230(next_mm); else switch_mm_0460(next_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) { } #define destroy_context(mm) do { } while (0) #define deactivate_mm(tsk,mm) do { } while (0) static inline void activate_mm(struct mm_struct *prev_mm, struct mm_struct *next_mm) { } #endif /* CONFIG_MMU */ #endif /* __M68K_MMU_CONTEXT_H */
Name | Type | Size | Permission | Actions |
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Kbuild | File | 599 B | 0644 |
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MC68328.h | File | 37.82 KB | 0644 |
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MC68EZ328.h | File | 37.74 KB | 0644 |
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MC68VZ328.h | File | 41.02 KB | 0644 |
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a.out-core.h | File | 1.98 KB | 0644 |
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adb_iop.h | File | 1.09 KB | 0644 |
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amigahw.h | File | 10.49 KB | 0644 |
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amigaints.h | File | 3.5 KB | 0644 |
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amigayle.h | File | 3.19 KB | 0644 |
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amipcmcia.h | File | 2.51 KB | 0644 |
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apollohw.h | File | 2.35 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 211 B | 0644 |
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atafd.h | File | 300 B | 0644 |
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atafdreg.h | File | 2.68 KB | 0644 |
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atari_joystick.h | File | 457 B | 0644 |
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atari_stdma.h | File | 514 B | 0644 |
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atari_stram.h | File | 528 B | 0644 |
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atarihw.h | File | 20.3 KB | 0644 |
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atariints.h | File | 5.56 KB | 0644 |
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atarikb.h | File | 1.4 KB | 0644 |
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atomic.h | File | 4.86 KB | 0644 |
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bitops.h | File | 12.19 KB | 0644 |
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blinken.h | File | 641 B | 0644 |
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bootinfo.h | File | 783 B | 0644 |
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bootstd.h | File | 4.64 KB | 0644 |
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bug.h | File | 659 B | 0644 |
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bugs.h | File | 369 B | 0644 |
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bvme6000hw.h | File | 3.45 KB | 0644 |
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cache.h | File | 296 B | 0644 |
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cacheflush.h | File | 133 B | 0644 |
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cacheflush_mm.h | File | 6.92 KB | 0644 |
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cacheflush_no.h | File | 2.61 KB | 0644 |
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checksum.h | File | 3.4 KB | 0644 |
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cmpxchg.h | File | 3.34 KB | 0644 |
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coldfire.h | File | 1.61 KB | 0644 |
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contregs.h | File | 3.31 KB | 0644 |
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current.h | File | 580 B | 0644 |
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delay.h | File | 3.43 KB | 0644 |
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div64.h | File | 858 B | 0644 |
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dma-mapping.h | File | 291 B | 0644 |
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dma.h | File | 16.65 KB | 0644 |
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dsp56k.h | File | 1.24 KB | 0644 |
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dvma.h | File | 9.67 KB | 0644 |
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elf.h | File | 3.07 KB | 0644 |
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entry.h | File | 5.76 KB | 0644 |
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export.h | File | 74 B | 0644 |
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fb.h | File | 921 B | 0644 |
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fbio.h | File | 9.87 KB | 0644 |
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flat.h | File | 1.02 KB | 0644 |
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floppy.h | File | 5.06 KB | 0644 |
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fpu.h | File | 535 B | 0644 |
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ftrace.h | File | 12 B | 0644 |
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gpio.h | File | 2.64 KB | 0644 |
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hardirq.h | File | 594 B | 0644 |
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hash.h | File | 2.07 KB | 0644 |
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hp300hw.h | File | 186 B | 0644 |
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hwtest.h | File | 467 B | 0644 |
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ide.h | File | 1.67 KB | 0644 |
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idprom.h | File | 725 B | 0644 |
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intersil.h | File | 1.11 KB | 0644 |
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io.h | File | 383 B | 0644 |
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io_mm.h | File | 16.19 KB | 0644 |
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io_no.h | File | 5.26 KB | 0644 |
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irq.h | File | 2.57 KB | 0644 |
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irqflags.h | File | 1.61 KB | 0644 |
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kexec.h | File | 732 B | 0644 |
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linkage.h | File | 1.55 KB | 0644 |
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m5206sim.h | File | 6.4 KB | 0644 |
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m520xsim.h | File | 7.15 KB | 0644 |
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m523xsim.h | File | 7.7 KB | 0644 |
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m525xsim.h | File | 10.57 KB | 0644 |
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m5272sim.h | File | 6.05 KB | 0644 |
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m527xsim.h | File | 13.51 KB | 0644 |
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m528xsim.h | File | 9.37 KB | 0644 |
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m52xxacr.h | File | 3.57 KB | 0644 |
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m5307sim.h | File | 7.52 KB | 0644 |
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m53xxacr.h | File | 3.6 KB | 0644 |
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m53xxsim.h | File | 53.97 KB | 0644 |
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m5407sim.h | File | 6.14 KB | 0644 |
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m5441xsim.h | File | 8.5 KB | 0644 |
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m54xxacr.h | File | 4.82 KB | 0644 |
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m54xxgpt.h | File | 3.66 KB | 0644 |
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m54xxpci.h | File | 6.13 KB | 0644 |
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m54xxsim.h | File | 3.8 KB | 0644 |
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mac_asc.h | File | 520 B | 0644 |
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mac_baboon.h | File | 999 B | 0644 |
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mac_iop.h | File | 5.37 KB | 0644 |
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mac_oss.h | File | 1.83 KB | 0644 |
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mac_psc.h | File | 7.25 KB | 0644 |
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mac_via.h | File | 11.44 KB | 0644 |
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machdep.h | File | 1.34 KB | 0644 |
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machines.h | File | 3.13 KB | 0644 |
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machw.h | File | 588 B | 0644 |
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macintosh.h | File | 2.02 KB | 0644 |
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macints.h | File | 3.28 KB | 0644 |
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math-emu.h | File | 6.74 KB | 0644 |
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mc146818rtc.h | File | 598 B | 0644 |
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mcf8390.h | File | 3.75 KB | 0644 |
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mcf_pgalloc.h | File | 2.37 KB | 0644 |
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mcf_pgtable.h | File | 9.89 KB | 0644 |
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mcfclk.h | File | 1.01 KB | 0644 |
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mcfdma.h | File | 6.51 KB | 0644 |
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mcfgpio.h | File | 8.48 KB | 0644 |
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mcfintc.h | File | 3.09 KB | 0644 |
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mcfmmu.h | File | 3.67 KB | 0644 |
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mcfpit.h | File | 2.22 KB | 0644 |
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mcfqspi.h | File | 1.82 KB | 0644 |
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mcfsim.h | File | 1.5 KB | 0644 |
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mcfslt.h | File | 1.21 KB | 0644 |
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mcftimer.h | File | 2.3 KB | 0644 |
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mcfuart.h | File | 6.91 KB | 0644 |
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mcfwdebug.h | File | 4.99 KB | 0644 |
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mmu.h | File | 243 B | 0644 |
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mmu_context.h | File | 7.2 KB | 0644 |
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mmzone.h | File | 264 B | 0644 |
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module.h | File | 847 B | 0644 |
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motorola_pgalloc.h | File | 2.26 KB | 0644 |
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motorola_pgtable.h | File | 9.2 KB | 0644 |
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movs.h | File | 1.44 KB | 0644 |
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mvme147hw.h | File | 2.81 KB | 0644 |
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mvme16xhw.h | File | 2.16 KB | 0644 |
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natfeat.h | File | 533 B | 0644 |
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nettel.h | File | 2.95 KB | 0644 |
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nubus.h | File | 1.21 KB | 0644 |
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openprom.h | File | 7.98 KB | 0644 |
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oplib.h | File | 9.54 KB | 0644 |
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page.h | File | 1.47 KB | 0644 |
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page_mm.h | File | 4.06 KB | 0644 |
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page_no.h | File | 1.28 KB | 0644 |
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page_offset.h | File | 256 B | 0644 |
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parport.h | File | 837 B | 0644 |
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pci.h | File | 458 B | 0644 |
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pgalloc.h | File | 444 B | 0644 |
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pgtable.h | File | 127 B | 0644 |
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pgtable_mm.h | File | 4.84 KB | 0644 |
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pgtable_no.h | File | 1.57 KB | 0644 |
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processor.h | File | 3.59 KB | 0644 |
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ptrace.h | File | 643 B | 0644 |
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q40_master.h | File | 2.28 KB | 0644 |
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q40ints.h | File | 749 B | 0644 |
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quicc_simple.h | File | 1.79 KB | 0644 |
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raw_io.h | File | 11.41 KB | 0644 |
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segment.h | File | 1.42 KB | 0644 |
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serial.h | File | 1.14 KB | 0644 |
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setup.h | File | 9.25 KB | 0644 |
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signal.h | File | 1.34 KB | 0644 |
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smp.h | File | 32 B | 0644 |
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string.h | File | 1.68 KB | 0644 |
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sun3-head.h | File | 353 B | 0644 |
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sun3_pgalloc.h | File | 2.26 KB | 0644 |
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sun3_pgtable.h | File | 7.65 KB | 0644 |
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sun3ints.h | File | 989 B | 0644 |
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sun3mmu.h | File | 4.91 KB | 0644 |
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sun3x.h | File | 868 B | 0644 |
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sun3xflop.h | File | 5.62 KB | 0644 |
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sun3xprom.h | File | 1.31 KB | 0644 |
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switch_to.h | File | 1.51 KB | 0644 |
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thread_info.h | File | 2.02 KB | 0644 |
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timex.h | File | 974 B | 0644 |
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tlb.h | File | 486 B | 0644 |
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tlbflush.h | File | 5.95 KB | 0644 |
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traps.h | File | 8.33 KB | 0644 |
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uaccess.h | File | 152 B | 0644 |
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uaccess_mm.h | File | 10.31 KB | 0644 |
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uaccess_no.h | File | 3.69 KB | 0644 |
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ucontext.h | File | 570 B | 0644 |
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unaligned.h | File | 600 B | 0644 |
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unistd.h | File | 952 B | 0644 |
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user.h | File | 3.78 KB | 0644 |
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vga.h | File | 651 B | 0644 |
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virtconvert.h | File | 947 B | 0644 |
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zorro.h | File | 1.17 KB | 0644 |
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