mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
fab957c11e
This contains all the code that directly interfaces with the RISC-V memory model. While this code corforms to the current RISC-V ISA specifications (user 2.2 and priv 1.10), the memory model is somewhat underspecified in those documents. There is a working group that hopes to produce a formal memory model by the end of the year, but my understanding is that the basic definitions we're relying on here won't change significantly. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/*
|
|
* Copyright (C) 2009 Chen Liqin <liqin.chen@sunplusct.com>
|
|
* Copyright (C) 2012 Regents of the University of California
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, version 2.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#ifndef _ASM_RISCV_TLBFLUSH_H
|
|
#define _ASM_RISCV_TLBFLUSH_H
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
/* Flush entire local TLB */
|
|
static inline void local_flush_tlb_all(void)
|
|
{
|
|
__asm__ __volatile__ ("sfence.vma" : : : "memory");
|
|
}
|
|
|
|
/* Flush one page from local TLB */
|
|
static inline void local_flush_tlb_page(unsigned long addr)
|
|
{
|
|
__asm__ __volatile__ ("sfence.vma %0" : : "r" (addr) : "memory");
|
|
}
|
|
|
|
#ifndef CONFIG_SMP
|
|
|
|
#define flush_tlb_all() local_flush_tlb_all()
|
|
#define flush_tlb_page(vma, addr) local_flush_tlb_page(addr)
|
|
#define flush_tlb_range(vma, start, end) local_flush_tlb_all()
|
|
|
|
#else /* CONFIG_SMP */
|
|
|
|
#include <asm/sbi.h>
|
|
|
|
#define flush_tlb_all() sbi_remote_sfence_vma(0, 0, -1)
|
|
#define flush_tlb_page(vma, addr) flush_tlb_range(vma, addr, 0)
|
|
#define flush_tlb_range(vma, start, end) \
|
|
sbi_remote_sfence_vma(0, start, (end) - (start))
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
/* Flush the TLB entries of the specified mm context */
|
|
static inline void flush_tlb_mm(struct mm_struct *mm)
|
|
{
|
|
flush_tlb_all();
|
|
}
|
|
|
|
/* Flush a range of kernel pages */
|
|
static inline void flush_tlb_kernel_range(unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
flush_tlb_all();
|
|
}
|
|
|
|
#endif /* CONFIG_MMU */
|
|
|
|
#endif /* _ASM_RISCV_TLBFLUSH_H */
|