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/* 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)
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