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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/alpha/include/asm/tlbflush.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/alpha/include/asm/tlbflush.h')
-rw-r--r-- | arch/alpha/include/asm/tlbflush.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/arch/alpha/include/asm/tlbflush.h b/arch/alpha/include/asm/tlbflush.h new file mode 100644 index 000000000..94dc37cf8 --- /dev/null +++ b/arch/alpha/include/asm/tlbflush.h @@ -0,0 +1,152 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ALPHA_TLBFLUSH_H +#define _ALPHA_TLBFLUSH_H + +#include <linux/mm.h> +#include <linux/sched.h> +#include <asm/compiler.h> + +#ifndef __EXTERN_INLINE +#define __EXTERN_INLINE extern inline +#define __MMU_EXTERN_INLINE +#endif + +extern void __load_new_mm_context(struct mm_struct *); + + +/* Use a few helper functions to hide the ugly broken ASN + numbers on early Alphas (ev4 and ev45). */ + +__EXTERN_INLINE void +ev4_flush_tlb_current(struct mm_struct *mm) +{ + __load_new_mm_context(mm); + tbiap(); +} + +__EXTERN_INLINE void +ev5_flush_tlb_current(struct mm_struct *mm) +{ + __load_new_mm_context(mm); +} + +/* Flush just one page in the current TLB set. We need to be very + careful about the icache here, there is no way to invalidate a + specific icache page. */ + +__EXTERN_INLINE void +ev4_flush_tlb_current_page(struct mm_struct * mm, + struct vm_area_struct *vma, + unsigned long addr) +{ + int tbi_flag = 2; + if (vma->vm_flags & VM_EXEC) { + __load_new_mm_context(mm); + tbi_flag = 3; + } + tbi(tbi_flag, addr); +} + +__EXTERN_INLINE void +ev5_flush_tlb_current_page(struct mm_struct * mm, + struct vm_area_struct *vma, + unsigned long addr) +{ + if (vma->vm_flags & VM_EXEC) + __load_new_mm_context(mm); + else + tbi(2, addr); +} + + +#ifdef CONFIG_ALPHA_GENERIC +# define flush_tlb_current alpha_mv.mv_flush_tlb_current +# define flush_tlb_current_page alpha_mv.mv_flush_tlb_current_page +#else +# ifdef CONFIG_ALPHA_EV4 +# define flush_tlb_current ev4_flush_tlb_current +# define flush_tlb_current_page ev4_flush_tlb_current_page +# else +# define flush_tlb_current ev5_flush_tlb_current +# define flush_tlb_current_page ev5_flush_tlb_current_page +# endif +#endif + +#ifdef __MMU_EXTERN_INLINE +#undef __EXTERN_INLINE +#undef __MMU_EXTERN_INLINE +#endif + +/* Flush current user mapping. */ +static inline void +flush_tlb(void) +{ + flush_tlb_current(current->active_mm); +} + +/* Flush someone else's user mapping. */ +static inline void +flush_tlb_other(struct mm_struct *mm) +{ + unsigned long *mmc = &mm->context[smp_processor_id()]; + /* Check it's not zero first to avoid cacheline ping pong + when possible. */ + if (*mmc) *mmc = 0; +} + +#ifndef CONFIG_SMP +/* Flush everything (kernel mapping may also have changed + due to vmalloc/vfree). */ +static inline void flush_tlb_all(void) +{ + tbia(); +} + +/* Flush a specified user mapping. */ +static inline void +flush_tlb_mm(struct mm_struct *mm) +{ + if (mm == current->active_mm) + flush_tlb_current(mm); + else + flush_tlb_other(mm); +} + +/* Page-granular tlb flush. */ +static inline void +flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) +{ + struct mm_struct *mm = vma->vm_mm; + + if (mm == current->active_mm) + flush_tlb_current_page(mm, vma, addr); + else + flush_tlb_other(mm); +} + +/* Flush a specified range of user mapping. On the Alpha we flush + the whole user tlb. */ +static inline void +flush_tlb_range(struct vm_area_struct *vma, unsigned long start, + unsigned long end) +{ + flush_tlb_mm(vma->vm_mm); +} + +#else /* CONFIG_SMP */ + +extern void flush_tlb_all(void); +extern void flush_tlb_mm(struct mm_struct *); +extern void flush_tlb_page(struct vm_area_struct *, unsigned long); +extern void flush_tlb_range(struct vm_area_struct *, unsigned long, + unsigned long); + +#endif /* CONFIG_SMP */ + +static inline void flush_tlb_kernel_range(unsigned long start, + unsigned long end) +{ + flush_tlb_all(); +} + +#endif /* _ALPHA_TLBFLUSH_H */ |