/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_M32R_MMU_CONTEXT_H #define _ASM_M32R_MMU_CONTEXT_H #ifdef __KERNEL__ #include <asm/m32r.h> #define MMU_CONTEXT_ASID_MASK (0x000000FF) #define MMU_CONTEXT_VERSION_MASK (0xFFFFFF00) #define MMU_CONTEXT_FIRST_VERSION (0x00000100) #define NO_CONTEXT (0x00000000) #ifndef __ASSEMBLY__ #include <linux/atomic.h> #include <linux/mm_types.h> #include <asm/pgalloc.h> #include <asm/mmu.h> #include <asm/tlbflush.h> #include <asm-generic/mm_hooks.h> /* * Cache of MMU context last used. */ #ifndef CONFIG_SMP extern unsigned long mmu_context_cache_dat; #define mmu_context_cache mmu_context_cache_dat #define mm_context(mm) mm->context #else /* not CONFIG_SMP */ extern unsigned long mmu_context_cache_dat[]; #define mmu_context_cache mmu_context_cache_dat[smp_processor_id()] #define mm_context(mm) mm->context[smp_processor_id()] #endif /* not CONFIG_SMP */ #define set_tlb_tag(entry, tag) (*entry = (tag & PAGE_MASK)|get_asid()) #define set_tlb_data(entry, data) (*entry = (data | _PAGE_PRESENT)) #ifdef CONFIG_MMU #define enter_lazy_tlb(mm, tsk) do { } while (0) static inline void get_new_mmu_context(struct mm_struct *mm) { unsigned long mc = ++mmu_context_cache; if (!(mc & MMU_CONTEXT_ASID_MASK)) { /* We exhaust ASID of this version. Flush all TLB and start new cycle. */ local_flush_tlb_all(); /* Fix version if needed. Note that we avoid version #0 to distinguish NO_CONTEXT. */ if (!mc) mmu_context_cache = mc = MMU_CONTEXT_FIRST_VERSION; } mm_context(mm) = mc; } /* * Get MMU context if needed. */ static inline void get_mmu_context(struct mm_struct *mm) { if (mm) { unsigned long mc = mmu_context_cache; /* Check if we have old version of context. If it's old, we need to get new context with new version. */ if ((mm_context(mm) ^ mc) & MMU_CONTEXT_VERSION_MASK) get_new_mmu_context(mm); } } /* * Initialize the context related info for a new mm_struct * instance. */ static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { #ifndef CONFIG_SMP mm->context = NO_CONTEXT; #else /* CONFIG_SMP */ int num_cpus = num_online_cpus(); int i; for (i = 0 ; i < num_cpus ; i++) mm->context[i] = NO_CONTEXT; #endif /* CONFIG_SMP */ return 0; } /* * Destroy context related info for an mm_struct that is about * to be put to rest. */ #define destroy_context(mm) do { } while (0) static inline void set_asid(unsigned long asid) { *(volatile unsigned long *)MASID = (asid & MMU_CONTEXT_ASID_MASK); } static inline unsigned long get_asid(void) { unsigned long asid; asid = *(volatile long *)MASID; asid &= MMU_CONTEXT_ASID_MASK; return asid; } /* * 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_context(struct mm_struct *mm) { get_mmu_context(mm); set_asid(mm_context(mm) & MMU_CONTEXT_ASID_MASK); } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { #ifdef CONFIG_SMP int cpu = smp_processor_id(); #endif /* CONFIG_SMP */ if (prev != next) { #ifdef CONFIG_SMP cpumask_set_cpu(cpu, mm_cpumask(next)); #endif /* CONFIG_SMP */ /* Set MPTB = next->pgd */ *(volatile unsigned long *)MPTB = (unsigned long)next->pgd; activate_context(next); } #ifdef CONFIG_SMP else if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next))) activate_context(next); #endif /* CONFIG_SMP */ } #define deactivate_mm(tsk, mm) do { } while (0) #define activate_mm(prev, next) \ switch_mm((prev), (next), NULL) #else /* not CONFIG_MMU */ #define get_mmu_context(mm) do { } while (0) #define init_new_context(tsk,mm) (0) #define destroy_context(mm) do { } while (0) #define set_asid(asid) do { } while (0) #define get_asid() (0) #define activate_context(mm) do { } while (0) #define switch_mm(prev,next,tsk) do { } while (0) #define deactivate_mm(mm,tsk) do { } while (0) #define activate_mm(prev,next) do { } while (0) #define enter_lazy_tlb(mm,tsk) do { } while (0) #endif /* not CONFIG_MMU */ #endif /* not __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_M32R_MMU_CONTEXT_H */
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m32104ut | Folder | 0755 |
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m32700ut | Folder | 0755 |
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mappi2 | Folder | 0755 |
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mappi3 | Folder | 0755 |
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opsput | Folder | 0755 |
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Kbuild | File | 318 B | 0644 |
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addrspace.h | File | 1.67 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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assembler.h | File | 4.2 KB | 0644 |
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atomic.h | File | 6.29 KB | 0644 |
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barrier.h | File | 506 B | 0644 |
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bitops.h | File | 6.23 KB | 0644 |
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bug.h | File | 115 B | 0644 |
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bugs.h | File | 410 B | 0644 |
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cache.h | File | 222 B | 0644 |
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cachectl.h | File | 739 B | 0644 |
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cacheflush.h | File | 3.2 KB | 0644 |
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checksum.h | File | 4.83 KB | 0644 |
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cmpxchg.h | File | 4.86 KB | 0644 |
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dcache_clear.h | File | 1.01 KB | 0644 |
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delay.h | File | 31 B | 0644 |
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device.h | File | 148 B | 0644 |
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div64.h | File | 31 B | 0644 |
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dma-mapping.h | File | 570 B | 0644 |
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dma.h | File | 281 B | 0644 |
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elf.h | File | 3.64 KB | 0644 |
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emergency-restart.h | File | 188 B | 0644 |
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fb.h | File | 414 B | 0644 |
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flat.h | File | 4.2 KB | 0644 |
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ftrace.h | File | 12 B | 0644 |
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futex.h | File | 82 B | 0644 |
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hardirq.h | File | 214 B | 0644 |
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hw_irq.h | File | 87 B | 0644 |
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io.h | File | 6.44 KB | 0644 |
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irq.h | File | 2.94 KB | 0644 |
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irq_regs.h | File | 34 B | 0644 |
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irqflags.h | File | 2.24 KB | 0644 |
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kdebug.h | File | 32 B | 0644 |
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kmap_types.h | File | 251 B | 0644 |
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linkage.h | File | 177 B | 0644 |
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local.h | File | 7.8 KB | 0644 |
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local64.h | File | 33 B | 0644 |
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m32102.h | File | 14.71 KB | 0644 |
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m32r.h | File | 5.7 KB | 0644 |
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m32r_mp_fpga.h | File | 14.89 KB | 0644 |
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mc146818rtc.h | File | 671 B | 0644 |
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mmu.h | File | 403 B | 0644 |
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mmu_context.h | File | 4.23 KB | 0644 |
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mmzone.h | File | 1.29 KB | 0644 |
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page.h | File | 2.62 KB | 0644 |
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pci.h | File | 147 B | 0644 |
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percpu.h | File | 165 B | 0644 |
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pgalloc.h | File | 1.84 KB | 0644 |
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pgtable-2level.h | File | 2.31 KB | 0644 |
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pgtable.h | File | 9.7 KB | 0644 |
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processor.h | File | 2.93 KB | 0644 |
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ptrace.h | File | 1.3 KB | 0644 |
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rtc.h | File | 1.99 KB | 0644 |
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s1d13806.h | File | 9.84 KB | 0644 |
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segment.h | File | 228 B | 0644 |
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serial.h | File | 187 B | 0644 |
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setup.h | File | 1022 B | 0644 |
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shmparam.h | File | 197 B | 0644 |
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signal.h | File | 561 B | 0644 |
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smp.h | File | 3.5 KB | 0644 |
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spinlock.h | File | 7.15 KB | 0644 |
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spinlock_types.h | File | 520 B | 0644 |
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string.h | File | 378 B | 0644 |
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switch_to.h | File | 1.48 KB | 0644 |
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syscall.h | File | 252 B | 0644 |
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termios.h | File | 1.74 KB | 0644 |
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thread_info.h | File | 3.71 KB | 0644 |
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timex.h | File | 581 B | 0644 |
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tlb.h | File | 483 B | 0644 |
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tlbflush.h | File | 2.94 KB | 0644 |
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topology.h | File | 167 B | 0644 |
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types.h | File | 258 B | 0644 |
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uaccess.h | File | 15.3 KB | 0644 |
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ucontext.h | File | 321 B | 0644 |
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unaligned.h | File | 592 B | 0644 |
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unistd.h | File | 1.23 KB | 0644 |
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user.h | File | 2.1 KB | 0644 |
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vga.h | File | 436 B | 0644 |
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xor.h | File | 148 B | 0644 |
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