/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __PARISC_MMU_CONTEXT_H #define __PARISC_MMU_CONTEXT_H #include <linux/mm.h> #include <linux/sched.h> #include <linux/atomic.h> #include <asm/pgalloc.h> #include <asm/pgtable.h> #include <asm-generic/mm_hooks.h> static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) { } /* on PA-RISC, we actually have enough contexts to justify an allocator * for them. prumpf */ extern unsigned long alloc_sid(void); extern void free_sid(unsigned long); static inline int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { BUG_ON(atomic_read(&mm->mm_users) != 1); mm->context = alloc_sid(); return 0; } static inline void destroy_context(struct mm_struct *mm) { free_sid(mm->context); mm->context = 0; } static inline unsigned long __space_to_prot(mm_context_t context) { #if SPACEID_SHIFT == 0 return context << 1; #else return context >> (SPACEID_SHIFT - 1); #endif } static inline void load_context(mm_context_t context) { mtsp(context, 3); mtctl(__space_to_prot(context), 8); } static inline void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { if (prev != next) { mtctl(__pa(next->pgd), 25); load_context(next->context); } } static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk) { unsigned long flags; if (prev == next) return; local_irq_save(flags); switch_mm_irqs_off(prev, next, tsk); local_irq_restore(flags); } #define switch_mm_irqs_off switch_mm_irqs_off #define deactivate_mm(tsk,mm) do { } while (0) static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next) { /* * Activate_mm is our one chance to allocate a space id * for a new mm created in the exec path. There's also * some lazy tlb stuff, which is currently dead code, but * we only allocate a space id if one hasn't been allocated * already, so we should be OK. */ BUG_ON(next == &init_mm); /* Should never happen */ if (next->context == 0) next->context = alloc_sid(); switch_mm(prev,next,current); } #endif
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agp.h | File | 596 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asmregs.h | File | 3.04 KB | 0644 |
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assembly.h | File | 12.94 KB | 0644 |
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atomic.h | File | 8.24 KB | 0644 |
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barrier.h | File | 2.44 KB | 0644 |
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bitops.h | File | 5.89 KB | 0644 |
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bug.h | File | 2.35 KB | 0644 |
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bugs.h | File | 340 B | 0644 |
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cache.h | File | 1.59 KB | 0644 |
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cacheflush.h | File | 4.06 KB | 0644 |
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checksum.h | File | 5.48 KB | 0644 |
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cmpxchg.h | File | 3.62 KB | 0644 |
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compat.h | File | 6.52 KB | 0644 |
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compat_ucontext.h | File | 591 B | 0644 |
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delay.h | File | 533 B | 0644 |
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dma-mapping.h | File | 2.42 KB | 0644 |
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dma.h | File | 5.71 KB | 0644 |
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dwarf.h | File | 602 B | 0644 |
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eisa_bus.h | File | 702 B | 0644 |
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eisa_eeprom.h | File | 4.42 KB | 0644 |
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elf.h | File | 14.31 KB | 0644 |
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fb.h | File | 403 B | 0644 |
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fixmap.h | File | 1.15 KB | 0644 |
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floppy.h | File | 6.61 KB | 0644 |
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ftrace.h | File | 379 B | 0644 |
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futex.h | File | 2.66 KB | 0644 |
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grfioctl.h | File | 4.68 KB | 0644 |
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hardirq.h | File | 1.3 KB | 0644 |
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hardware.h | File | 4.1 KB | 0644 |
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hash.h | File | 5.07 KB | 0644 |
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hugetlb.h | File | 1.67 KB | 0644 |
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ide.h | File | 1.09 KB | 0644 |
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io.h | File | 8.14 KB | 0644 |
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irq.h | File | 1.23 KB | 0644 |
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irqflags.h | File | 1.02 KB | 0644 |
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kbdleds.h | File | 477 B | 0644 |
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kmap_types.h | File | 221 B | 0644 |
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ldcw.h | File | 2.15 KB | 0644 |
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led.h | File | 1.33 KB | 0644 |
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linkage.h | File | 759 B | 0644 |
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machdep.h | File | 349 B | 0644 |
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mckinley.h | File | 270 B | 0644 |
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mmu.h | File | 195 B | 0644 |
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mmu_context.h | File | 2.08 KB | 0644 |
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mmzone.h | File | 1.51 KB | 0644 |
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module.h | File | 527 B | 0644 |
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page.h | File | 5.42 KB | 0644 |
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parisc-device.h | File | 1.92 KB | 0644 |
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parport.h | File | 358 B | 0644 |
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pci.h | File | 6.57 KB | 0644 |
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pdc.h | File | 3.93 KB | 0644 |
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pdc_chassis.h | File | 15.06 KB | 0644 |
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pdcpat.h | File | 15 KB | 0644 |
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perf.h | File | 1.89 KB | 0644 |
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perf_event.h | File | 152 B | 0644 |
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pgalloc.h | File | 4.22 KB | 0644 |
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pgtable.h | File | 18.92 KB | 0644 |
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prefetch.h | File | 1.12 KB | 0644 |
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processor.h | File | 9.86 KB | 0644 |
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psw.h | File | 2.39 KB | 0644 |
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ptrace.h | File | 803 B | 0644 |
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ropes.h | File | 9.73 KB | 0644 |
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rt_sigframe.h | File | 745 B | 0644 |
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runway.h | File | 320 B | 0644 |
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sections.h | File | 283 B | 0644 |
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serial.h | File | 124 B | 0644 |
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shmparam.h | File | 263 B | 0644 |
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signal.h | File | 841 B | 0644 |
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smp.h | File | 1.25 KB | 0644 |
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socket.h | File | 311 B | 0644 |
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special_insns.h | File | 1015 B | 0644 |
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spinlock.h | File | 4.02 KB | 0644 |
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spinlock_types.h | File | 483 B | 0644 |
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string.h | File | 247 B | 0644 |
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superio.h | File | 3.25 KB | 0644 |
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switch_to.h | File | 332 B | 0644 |
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syscall.h | File | 1.4 KB | 0644 |
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termios.h | File | 1.72 KB | 0644 |
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thread_info.h | File | 3.15 KB | 0644 |
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timex.h | File | 372 B | 0644 |
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tlb.h | File | 672 B | 0644 |
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tlbflush.h | File | 2.63 KB | 0644 |
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topology.h | File | 900 B | 0644 |
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traps.h | File | 468 B | 0644 |
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uaccess.h | File | 6.55 KB | 0644 |
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ucontext.h | File | 327 B | 0644 |
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unaligned.h | File | 472 B | 0644 |
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unistd.h | File | 5.47 KB | 0644 |
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unwind.h | File | 2.56 KB | 0644 |
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