143 lines
3.9 KiB
ArmAsm
143 lines
3.9 KiB
ArmAsm
@ This file is part of Luma3DS
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@ Copyright (C) 2016-2020 Aurora Wright, TuxSH
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@
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@ This program is free software: you can redistribute it and/or modify
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@ it under the terms of the GNU General Public License as published by
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@ the Free Software Foundation, either version 3 of the License, or
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@ (at your option) any later version.
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@
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@ This program is distributed in the hope that it will be useful,
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@ but WITHOUT ANY WARRANTY; without even the implied warranty of
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@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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@ GNU General Public License for more details.
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@
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@ You should have received a copy of the GNU General Public License
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@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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@
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@ Additional Terms 7.b and 7.c of GPLv3 apply to this file:
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@ * Requiring preservation of specified reasonable legal notices or
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@ author attributions in that material or in the Appropriate Legal
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@ Notices displayed by works containing it.
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@ * Prohibiting misrepresentation of the origin of that material,
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@ or requiring that modified versions of such material be marked in
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@ reasonable ways as different from the original version.
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.text
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.arm
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.balign 4
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.global convertVAToPA
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.type convertVAToPA, %function
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convertVAToPA:
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mov r3, r1
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mov r1, #0xf00
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orr r1, #0xff
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and r2, r0, r1
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bic r0, r1
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cmp r3, #1
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beq _convertVAToPA_write_check
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_convertVAToPA_read_check:
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mcr p15, 0, r0, c7, c8, 0 @ VA to PA translation with privileged read permission check
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b _convertVAToPA_end_check
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_convertVAToPA_write_check:
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mcr p15, 0, r0, c7, c8, 1 @ VA to PA translation with privileged write permission check
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_convertVAToPA_end_check:
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mrc p15, 0, r0, c7, c4, 0 @ read PA register
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tst r0, #1 @ failure bit
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bic r0, r1
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addeq r0, r2
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movne r0, #0
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bx lr
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.global flushEntireDataCache
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.type flushEntireDataCache, %function
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flushEntireDataCache:
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mvn r1, #0 @ this is translated to a full cache flush
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ldr r12, =flushDataCacheRange
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ldr r12, [r12]
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bx r12
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.global invalidateEntireInstructionCache
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.type invalidateEntireInstructionCache, %function
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invalidateEntireInstructionCache:
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mvn r1, #0 @ this is translated to a full cache flush
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ldr r12, =invalidateInstructionCacheRange
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ldr r12, [r12]
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bx r12
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.global KObjectMutex__Acquire
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.type KObjectMutex__Acquire, %function
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KObjectMutex__Acquire:
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ldr r1, =0xFFFF9000 @ current thread addr
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ldr r1, [r1]
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ldrex r2, [r0]
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cmp r2, #0
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strexeq r3, r1, [r0] @ store current thread
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strexne r3, r2, [r0] @ stored thread != NULL, no change
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cmpeq r3, #0
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bxeq lr
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ldr r12, =KObjectMutex__WaitAndAcquire
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ldr r12, [r12]
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bx r12
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.global KObjectMutex__Release
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.type KObjectMutex__Release, %function
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KObjectMutex__Release:
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mov r1, #0
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str r1, [r0]
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ldrh r1, [r0, #4]
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cmp r1, #0
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bxle lr
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ldr r12, =KObjectMutex__ErrorOccured
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ldr r12, [r12]
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blx r12
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bx lr
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.global safecpy
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.type safecpy, %function
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safecpy:
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push {r4, lr}
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mov r3, #0
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movs r12, #1
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_safecpy_loop:
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ldrb r4, [r1, r3]
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cmp r12, #0
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beq _safecpy_loop_end
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strb r4, [r0, r3]
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add r3, #1
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cmp r3, r2
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blo _safecpy_loop
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_safecpy_loop_end:
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mov r0, r3
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pop {r4, pc}
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_safecpy_end:
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.section .rodata.safecpy_sz, "a", %progbits
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.global safecpy_sz
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.type safecpy_sz, %object
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safecpy_sz: .word _safecpy_end - safecpy
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.section .bss.SGI0Handler, "aw", %nobits
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.balign 4
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.global SGI0Handler
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.type safecpy_sz, %object
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SGI0Handler: .skip 4 @ see synchronization.c
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.balign 4
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.section .data.customInterruptEvent, "aw", %progbits
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.balign 4
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_customInterruptEventObj: .word SGI0Handler
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.global customInterruptEvent
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.type safecpy_sz, %object
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customInterruptEvent: .word _customInterruptEventObj
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