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