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1/*
2 * Copyright (c) 2024, Arm Limited. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7#include <arch.h>
8#include <asm_macros.S>
9#include <lib/extensions/sysreg128.h>
10
11        .global read_par_el1
12        .global write_par_el1
13        .global read_ttbr0_el1
14        .global write_ttbr0_el1
15        .global read_ttbr1_el1
16        .global write_ttbr1_el1
17        .global read_ttbr0_el2
18        .global write_ttbr0_el2
19        .global read_ttbr1_el2
20        .global write_ttbr1_el2
21        .global read_vttbr_el2
22        .global write_vttbr_el2
23        .global read_rcwmask_el1
24        .global write_rcwmask_el1
25        .global read_rcwsmask_el1
26        .global write_rcwsmask_el1
27
28/*
29 * _mrrs - Move System register to two adjacent general-purpose
30 * registers.
31 * Instruction: MRRS <Xt>, <Xt+1>, (<systemreg>|S<op0>_<op1>_<Cn>_<Cm>_<op2>)
32 *
33 * Arguments/Opcode bit field:
34 * regins: System register opcode.
35 *
36 * Clobbers: x0,x1,x2
37 */
38.macro _mrrs regins:req
39#if ENABLE_FEAT_D128 == 2
40        mrs     x0, ID_AA64MMFR3_EL1
41        tst     x0, #(ID_AA64MMFR3_EL1_D128_MASK << ID_AA64MMFR3_EL1_D128_SHIFT)
42        bne     1f
43        /* If FEAT_D128 is not implemented then use mrs */
44        .inst   0xD5300000 | (\regins)
45        ret
46#endif
471:
48        .inst   0xD5700000 | (\regins)
49        ret
50.endm
51
52/*
53 * _msrr - Move two adjacent general-purpose registers to System register.
54 * Instruction: MSRR (<systemreg>|S<op0>_<op1>_<Cn>_<Cm>_<op2>), <Xt>, <Xt+1>
55 *
56 * Arguments/Opcode bit field:
57 * regins: System register opcode.
58 *
59 * Clobbers: x0,x1,x2
60 */
61.macro _msrr regins:req
62        /* If FEAT_D128 is not implemented use msr, dont tamper
63         * x0, x1 as they maybe used for mrrs */
64#if ENABLE_FEAT_D128 == 2
65        mrs     x2, ID_AA64MMFR3_EL1
66        tst     x2, #(ID_AA64MMFR3_EL1_D128_MASK << ID_AA64MMFR3_EL1_D128_SHIFT)
67        bne     1f
68        /* If FEAT_D128 is not implemented then use msr */
69        .inst   0xD5100000 | (\regins)
70        ret
71#endif
721:
73        .inst   0xD5500000 | (\regins)
74        ret
75.endm
76
77func read_par_el1
78        _mrrs   0x87400 /* S3_0_C7_C4_0 */
79endfunc read_par_el1
80
81func write_par_el1
82        _msrr   0x87400
83endfunc write_par_el1
84
85func read_ttbr0_el1
86        _mrrs   0x82000 /* S3_0_C2_C0_0 */
87endfunc read_ttbr0_el1
88
89func write_ttbr0_el1
90        _msrr 0x82000
91endfunc write_ttbr0_el1
92
93func read_ttbr1_el1
94        _mrrs 0x82020 /* S3_0_C2_C0_1 */
95endfunc read_ttbr1_el1
96
97func write_ttbr1_el1
98        _msrr 0x82020
99endfunc write_ttbr1_el1
100
101func read_ttbr0_el2
102        _mrrs 0xC2000 /* S3_4_C2_C0_0 */
103endfunc read_ttbr0_el2
104
105func write_ttbr0_el2
106        _msrr 0xC2000
107endfunc write_ttbr0_el2
108
109func read_ttbr1_el2
110        _mrrs 0xC2020 /* S3_4_C2_C0_1 */
111endfunc read_ttbr1_el2
112
113func write_ttbr1_el2
114        _msrr 0xC2020
115endfunc write_ttbr1_el2
116
117func read_vttbr_el2
118        _mrrs 0xC2100 /* S3_4_C2_C1_0 */
119endfunc read_vttbr_el2
120
121func write_vttbr_el2
122        _msrr 0xC2100
123endfunc write_vttbr_el2
124
125func read_rcwmask_el1
126        _mrrs 0x8D0C0 /* S3_0_C13_C0_6 */
127endfunc read_rcwmask_el1
128
129func write_rcwmask_el1
130        _msrr 0x8D0C0
131endfunc write_rcwmask_el1
132
133func read_rcwsmask_el1
134        _mrrs 0x8D060 /* S3_0_C13_C0_3 */
135endfunc read_rcwsmask_el1
136
137func write_rcwsmask_el1
138        _msrr 0x8D060
139endfunc write_rcwsmask_el1
140