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/* 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 <[email protected]>
*/
#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 */
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