forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.5 KiB
62 lines
1.5 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* |
|
* linux/arch/arm/mm/tlbv4wbi.S |
|
* |
|
* Copyright (C) 1997-2002 Russell King |
|
* |
|
* ARM architecture version 4 and version 5 TLB handling functions. |
|
* These assume a split I/D TLBs, with a write buffer. |
|
* |
|
* Processors: ARM920 ARM922 ARM925 ARM926 XScale |
|
*/ |
|
#include <linux/linkage.h> |
|
#include <linux/init.h> |
|
#include <asm/assembler.h> |
|
#include <asm/asm-offsets.h> |
|
#include <asm/tlbflush.h> |
|
#include "proc-macros.S" |
|
|
|
/* |
|
* v4wb_flush_user_tlb_range(start, end, mm) |
|
* |
|
* Invalidate a range of TLB entries in the specified address space. |
|
* |
|
* - start - range start address |
|
* - end - range end address |
|
* - mm - mm_struct describing address space |
|
*/ |
|
.align 5 |
|
ENTRY(v4wbi_flush_user_tlb_range) |
|
vma_vm_mm ip, r2 |
|
act_mm r3 @ get current->active_mm |
|
eors r3, ip, r3 @ == mm ? |
|
retne lr @ no, we dont do anything |
|
mov r3, #0 |
|
mcr p15, 0, r3, c7, c10, 4 @ drain WB |
|
vma_vm_flags r2, r2 |
|
bic r0, r0, #0x0ff |
|
bic r0, r0, #0xf00 |
|
1: tst r2, #VM_EXEC |
|
mcrne p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry |
|
mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry |
|
add r0, r0, #PAGE_SZ |
|
cmp r0, r1 |
|
blo 1b |
|
ret lr |
|
|
|
ENTRY(v4wbi_flush_kern_tlb_range) |
|
mov r3, #0 |
|
mcr p15, 0, r3, c7, c10, 4 @ drain WB |
|
bic r0, r0, #0x0ff |
|
bic r0, r0, #0xf00 |
|
1: mcr p15, 0, r0, c8, c5, 1 @ invalidate I TLB entry |
|
mcr p15, 0, r0, c8, c6, 1 @ invalidate D TLB entry |
|
add r0, r0, #PAGE_SZ |
|
cmp r0, r1 |
|
blo 1b |
|
ret lr |
|
|
|
__INITDATA |
|
|
|
/* define struct cpu_tlb_fns (see <asm/tlbflush.h> and proc-macros.S) */ |
|
define_tlb_functions v4wbi, v4wbi_tlb_flags
|
|
|