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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/ia64/include/asm/tlbflush.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/ia64/include/asm/tlbflush.h')
-rw-r--r-- | arch/ia64/include/asm/tlbflush.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/tlbflush.h b/arch/ia64/include/asm/tlbflush.h new file mode 100644 index 000000000..ceac10c4d --- /dev/null +++ b/arch/ia64/include/asm/tlbflush.h @@ -0,0 +1,128 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_IA64_TLBFLUSH_H +#define _ASM_IA64_TLBFLUSH_H + +/* + * Copyright (C) 2002 Hewlett-Packard Co + * David Mosberger-Tang <davidm@hpl.hp.com> + */ + + +#include <linux/mm.h> + +#include <asm/intrinsics.h> +#include <asm/mmu_context.h> +#include <asm/page.h> + +struct ia64_tr_entry { + u64 ifa; + u64 itir; + u64 pte; + u64 rr; +}; /*Record for tr entry!*/ + +extern int ia64_itr_entry(u64 target_mask, u64 va, u64 pte, u64 log_size); +extern void ia64_ptr_entry(u64 target_mask, int slot); +extern struct ia64_tr_entry *ia64_idtrs[NR_CPUS]; + +/* + region register macros +*/ +#define RR_TO_VE(val) (((val) >> 0) & 0x0000000000000001) +#define RR_VE(val) (((val) & 0x0000000000000001) << 0) +#define RR_VE_MASK 0x0000000000000001L +#define RR_VE_SHIFT 0 +#define RR_TO_PS(val) (((val) >> 2) & 0x000000000000003f) +#define RR_PS(val) (((val) & 0x000000000000003f) << 2) +#define RR_PS_MASK 0x00000000000000fcL +#define RR_PS_SHIFT 2 +#define RR_RID_MASK 0x00000000ffffff00L +#define RR_TO_RID(val) ((val >> 8) & 0xffffff) + +/* + * Now for some TLB flushing routines. This is the kind of stuff that + * can be very expensive, so try to avoid them whenever possible. + */ +extern void setup_ptcg_sem(int max_purges, int from_palo); + +/* + * Flush everything (kernel mapping may also have changed due to + * vmalloc/vfree). + */ +extern void local_flush_tlb_all (void); + +#ifdef CONFIG_SMP + extern void smp_flush_tlb_all (void); + extern void smp_flush_tlb_mm (struct mm_struct *mm); + extern void smp_flush_tlb_cpumask (cpumask_t xcpumask); +# define flush_tlb_all() smp_flush_tlb_all() +#else +# define flush_tlb_all() local_flush_tlb_all() +# define smp_flush_tlb_cpumask(m) local_flush_tlb_all() +#endif + +static inline void +local_finish_flush_tlb_mm (struct mm_struct *mm) +{ + if (mm == current->active_mm) + activate_context(mm); +} + +/* + * Flush a specified user mapping. This is called, e.g., as a result of fork() and + * exit(). fork() ends up here because the copy-on-write mechanism needs to write-protect + * the PTEs of the parent task. + */ +static inline void +flush_tlb_mm (struct mm_struct *mm) +{ + if (!mm) + return; + + set_bit(mm->context, ia64_ctx.flushmap); + mm->context = 0; + + if (atomic_read(&mm->mm_users) == 0) + return; /* happens as a result of exit_mmap() */ + +#ifdef CONFIG_SMP + smp_flush_tlb_mm(mm); +#else + local_finish_flush_tlb_mm(mm); +#endif +} + +extern void flush_tlb_range (struct vm_area_struct *vma, unsigned long start, unsigned long end); + +/* + * Page-granular tlb flush. + */ +static inline void +flush_tlb_page (struct vm_area_struct *vma, unsigned long addr) +{ +#ifdef CONFIG_SMP + flush_tlb_range(vma, (addr & PAGE_MASK), (addr & PAGE_MASK) + PAGE_SIZE); +#else + if (vma->vm_mm == current->active_mm) + ia64_ptcl(addr, (PAGE_SHIFT << 2)); + else + vma->vm_mm->context = 0; +#endif +} + +/* + * Flush the local TLB. Invoked from another cpu using an IPI. + */ +#ifdef CONFIG_SMP +void smp_local_flush_tlb(void); +#else +#define smp_local_flush_tlb() +#endif + +static inline void flush_tlb_kernel_range(unsigned long start, + unsigned long end) +{ + flush_tlb_all(); /* XXX fix me */ +} + +#endif /* _ASM_IA64_TLBFLUSH_H */ |