#------------------------------------------------------------------------------ | |
# | |
# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> | |
# Copyright (c) 2011 - 2016, ARM Limited. All rights reserved. | |
# Copyright (c) 2016, Linaro Limited. All rights reserved. | |
# | |
# SPDX-License-Identifier: BSD-2-Clause-Patent | |
# | |
#------------------------------------------------------------------------------ | |
#include <AsmMacroIoLibV8.h> | |
.set DAIF_RD_FIQ_BIT, (1 << 6) | |
.set DAIF_RD_IRQ_BIT, (1 << 7) | |
.set SCTLR_ELx_M_BIT_POS, (0) | |
ASM_FUNC(ArmReadMidr) | |
mrs x0, midr_el1 // Read from Main ID Register (MIDR) | |
ret | |
ASM_FUNC(ArmCacheInfo) | |
mrs x0, ctr_el0 // Read from Cache Type Regiter (CTR) | |
ret | |
ASM_FUNC(ArmGetInterruptState) | |
mrs x0, daif | |
tst w0, #DAIF_RD_IRQ_BIT // Check if IRQ is enabled. Enabled if 0 (Z=1) | |
cset w0, eq // if Z=1 return 1, else 0 | |
ret | |
ASM_FUNC(ArmGetFiqState) | |
mrs x0, daif | |
tst w0, #DAIF_RD_FIQ_BIT // Check if FIQ is enabled. Enabled if 0 (Z=1) | |
cset w0, eq // if Z=1 return 1, else 0 | |
ret | |
ASM_FUNC(ArmWriteCpacr) | |
msr cpacr_el1, x0 // Coprocessor Access Control Reg (CPACR) | |
ret | |
ASM_FUNC(ArmWriteAuxCr) | |
EL1_OR_EL2(x1) | |
1:msr actlr_el1, x0 // Aux Control Reg (ACTLR) at EL1. Also available in EL2 and EL3 | |
ret | |
2:msr actlr_el2, x0 // Aux Control Reg (ACTLR) at EL1. Also available in EL2 and EL3 | |
ret | |
ASM_FUNC(ArmReadAuxCr) | |
EL1_OR_EL2(x1) | |
1:mrs x0, actlr_el1 // Aux Control Reg (ACTLR) at EL1. Also available in EL2 and EL3 | |
ret | |
2:mrs x0, actlr_el2 // Aux Control Reg (ACTLR) at EL1. Also available in EL2 and EL3 | |
ret | |
ASM_FUNC(ArmSetTTBR0) | |
EL1_OR_EL2(x1) | |
1:msr ttbr0_el1, x0 // Translation Table Base Reg 0 (TTBR0) | |
b 4f | |
2:msr ttbr0_el2, x0 // Translation Table Base Reg 0 (TTBR0) | |
4:isb | |
ret | |
ASM_FUNC(ArmGetTTBR0BaseAddress) | |
EL1_OR_EL2(x1) | |
1:mrs x0, ttbr0_el1 | |
b 3f | |
2:mrs x0, ttbr0_el2 | |
3:and x0, x0, 0xFFFFFFFFFFFF /* Look at bottom 48 bits */ | |
isb | |
ret | |
ASM_FUNC(ArmGetTCR) | |
EL1_OR_EL2(x1) | |
1:mrs x0, tcr_el1 | |
b 4f | |
2:mrs x0, tcr_el2 | |
4:isb | |
ret | |
ASM_FUNC(ArmSetTCR) | |
EL1_OR_EL2(x1) | |
1:msr tcr_el1, x0 | |
b 4f | |
2:msr tcr_el2, x0 | |
4:isb | |
ret | |
ASM_FUNC(ArmGetMAIR) | |
EL1_OR_EL2(x1) | |
1:mrs x0, mair_el1 | |
b 4f | |
2:mrs x0, mair_el2 | |
4:isb | |
ret | |
ASM_FUNC(ArmSetMAIR) | |
EL1_OR_EL2(x1) | |
1:msr mair_el1, x0 | |
b 4f | |
2:msr mair_el2, x0 | |
4:isb | |
ret | |
// | |
//VOID | |
//ArmUpdateTranslationTableEntry ( | |
// IN VOID *TranslationTableEntry // X0 | |
// IN VOID *MVA // X1 | |
// ); | |
ASM_FUNC(ArmUpdateTranslationTableEntry) | |
dsb nshst | |
lsr x1, x1, #12 | |
EL1_OR_EL2(x2) | |
1: tlbi vaae1, x1 // TLB Invalidate VA , EL1 | |
mrs x2, sctlr_el1 | |
b 4f | |
2: tlbi vae2, x1 // TLB Invalidate VA , EL2 | |
mrs x2, sctlr_el2 | |
4: tbnz x2, SCTLR_ELx_M_BIT_POS, 5f | |
dc ivac, x0 // invalidate in Dcache if MMU is still off | |
5: dsb nsh | |
isb | |
ret | |
ASM_FUNC(ArmInvalidateTlb) | |
EL1_OR_EL2(x0) | |
1: tlbi vmalle1 | |
b 4f | |
2: tlbi alle2 | |
4: dsb sy | |
isb | |
ret | |
ASM_FUNC(ArmCallWFE) | |
wfe | |
ret | |
ASM_FUNC(ArmCallSEV) | |
sev | |
ret | |
ASM_FUNC(ArmReadCpuActlr) | |
mrs x0, S3_1_c15_c2_0 | |
ret | |
ASM_FUNC(ArmWriteCpuActlr) | |
msr S3_1_c15_c2_0, x0 | |
dsb sy | |
isb | |
ret | |
ASM_FUNC(ArmReadSctlr) | |
EL1_OR_EL2(x1) | |
1:mrs x0, sctlr_el1 | |
ret | |
2:mrs x0, sctlr_el2 | |
ret | |
ASM_FUNC(ArmWriteSctlr) | |
EL1_OR_EL2(x1) | |
1:msr sctlr_el1, x0 | |
ret | |
2:msr sctlr_el2, x0 | |
ret | |
ASM_FUNC(ArmGetPhysicalAddressBits) | |
mrs x0, id_aa64mmfr0_el1 | |
adr x1, .LPARanges | |
and x0, x0, #0xf | |
ldrb w0, [x1, x0] | |
ret | |
// | |
// Bits 0..3 of the AA64MFR0_EL1 system register encode the size of the | |
// physical address space support on this CPU: | |
// 0 == 32 bits, 1 == 36 bits, etc etc | |
// 7 and up are reserved | |
// | |
.LPARanges: | |
.byte 32, 36, 40, 42, 44, 48, 52, 0 | |
.byte 0, 0, 0, 0, 0, 0, 0, 0 | |
ASM_FUNCTION_REMOVE_IF_UNREFERENCED |