131 lines
2.4 KiB
ArmAsm
131 lines
2.4 KiB
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
/* Copyright (C) 2020 ARM Limited */
|
||
|
|
|
||
|
|
#include "mte_def.h"
|
||
|
|
|
||
|
|
.arch armv8.5-a+memtag
|
||
|
|
|
||
|
|
#define ENTRY(name) \
|
||
|
|
.globl name ;\
|
||
|
|
.p2align 2;\
|
||
|
|
.type name, @function ;\
|
||
|
|
name:
|
||
|
|
|
||
|
|
#define ENDPROC(name) \
|
||
|
|
.size name, .-name ;
|
||
|
|
|
||
|
|
.text
|
||
|
|
/*
|
||
|
|
* mte_insert_random_tag: Insert random tag and might be same as the source tag if
|
||
|
|
* the source pointer has it.
|
||
|
|
* Input:
|
||
|
|
* x0 - source pointer with a tag/no-tag
|
||
|
|
* Return:
|
||
|
|
* x0 - pointer with random tag
|
||
|
|
*/
|
||
|
|
ENTRY(mte_insert_random_tag)
|
||
|
|
irg x0, x0, xzr
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_insert_random_tag)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mte_insert_new_tag: Insert new tag and different from the source tag if
|
||
|
|
* source pointer has it.
|
||
|
|
* Input:
|
||
|
|
* x0 - source pointer with a tag/no-tag
|
||
|
|
* Return:
|
||
|
|
* x0 - pointer with random tag
|
||
|
|
*/
|
||
|
|
ENTRY(mte_insert_new_tag)
|
||
|
|
gmi x1, x0, xzr
|
||
|
|
irg x0, x0, x1
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_insert_new_tag)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mte_get_tag_address: Get the tag from given address.
|
||
|
|
* Input:
|
||
|
|
* x0 - source pointer
|
||
|
|
* Return:
|
||
|
|
* x0 - pointer with appended tag
|
||
|
|
*/
|
||
|
|
ENTRY(mte_get_tag_address)
|
||
|
|
ldg x0, [x0]
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_get_tag_address)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mte_set_tag_address_range: Set the tag range from the given address
|
||
|
|
* Input:
|
||
|
|
* x0 - source pointer with tag data
|
||
|
|
* x1 - range
|
||
|
|
* Return:
|
||
|
|
* none
|
||
|
|
*/
|
||
|
|
ENTRY(mte_set_tag_address_range)
|
||
|
|
cbz x1, 2f
|
||
|
|
1:
|
||
|
|
stg x0, [x0, #0x0]
|
||
|
|
add x0, x0, #MT_GRANULE_SIZE
|
||
|
|
sub x1, x1, #MT_GRANULE_SIZE
|
||
|
|
cbnz x1, 1b
|
||
|
|
2:
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_set_tag_address_range)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mt_clear_tag_address_range: Clear the tag range from the given address
|
||
|
|
* Input:
|
||
|
|
* x0 - source pointer with tag data
|
||
|
|
* x1 - range
|
||
|
|
* Return:
|
||
|
|
* none
|
||
|
|
*/
|
||
|
|
ENTRY(mte_clear_tag_address_range)
|
||
|
|
cbz x1, 2f
|
||
|
|
1:
|
||
|
|
stzg x0, [x0, #0x0]
|
||
|
|
add x0, x0, #MT_GRANULE_SIZE
|
||
|
|
sub x1, x1, #MT_GRANULE_SIZE
|
||
|
|
cbnz x1, 1b
|
||
|
|
2:
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_clear_tag_address_range)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mte_enable_pstate_tco: Enable PSTATE.TCO (tag check override) field
|
||
|
|
* Input:
|
||
|
|
* none
|
||
|
|
* Return:
|
||
|
|
* none
|
||
|
|
*/
|
||
|
|
ENTRY(mte_enable_pstate_tco)
|
||
|
|
msr tco, #MT_PSTATE_TCO_EN
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_enable_pstate_tco)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mte_disable_pstate_tco: Disable PSTATE.TCO (tag check override) field
|
||
|
|
* Input:
|
||
|
|
* none
|
||
|
|
* Return:
|
||
|
|
* none
|
||
|
|
*/
|
||
|
|
ENTRY(mte_disable_pstate_tco)
|
||
|
|
msr tco, #MT_PSTATE_TCO_DIS
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_disable_pstate_tco)
|
||
|
|
|
||
|
|
/*
|
||
|
|
* mte_get_pstate_tco: Get PSTATE.TCO (tag check override) field
|
||
|
|
* Input:
|
||
|
|
* none
|
||
|
|
* Return:
|
||
|
|
* x0
|
||
|
|
*/
|
||
|
|
ENTRY(mte_get_pstate_tco)
|
||
|
|
mrs x0, tco
|
||
|
|
ubfx x0, x0, #MT_PSTATE_TCO_SHIFT, #1
|
||
|
|
ret
|
||
|
|
ENDPROC(mte_get_pstate_tco)
|