88 lines
3.1 KiB
C
88 lines
3.1 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016-2017 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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*/
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#pragma once
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#include "types.h"
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#include "kernel.h"
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// For accessing physmem uncached (and directly)
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#define PA_PTR(addr) (void *)((u32)(addr) | 1u << 31)
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#define PA_FROM_VA_PTR(addr) PA_PTR(convertVAToPA(addr, false))
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static inline u32 makeARMBranch(const void *src, const void *dst, bool link) // the macros for those are ugly and buggy
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{
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u32 instrBase = link ? 0xEB000000 : 0xEA000000;
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u32 off = (u32)((const u8 *)dst - ((const u8 *)src + 8)); // the PC is always two instructions ahead of the one being executed
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return instrBase | ((off >> 2) & 0xFFFFFF);
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}
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static inline void *decodeARMBranch(const void *src)
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{
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u32 instr = *(const u32 *)src;
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s32 off = (instr & 0xFFFFFF) << 2;
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off = (off << 6) >> 6; // sign extend
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return (void *)((const u8 *)src + 8 + off);
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}
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// For ARM prologs in the form of: push {regs} ... sub sp, #off (this obviously doesn't intend to cover all cases)
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static inline u32 computeARMFrameSize(const u32 *prolog)
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{
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const u32 *off;
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for(off = prolog; (*off >> 16) != 0xE92D; off++); // look for stmfd sp! = push
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u32 nbPushedRegs = 0;
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for(u32 val = *off & 0xFFFF; val != 0; val >>= 1) // 1 bit = 1 pushed register
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nbPushedRegs += val & 1;
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for(; (*off >> 8) != 0xE24DD0; off++); // look for sub sp, #offset
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u32 localVariablesSpaceSize = *off & 0xFF;
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return 4 * nbPushedRegs + localVariablesSpaceSize;
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}
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static inline u32 getNumberOfCores(void)
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{
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return (MPCORE_SCU_CFG & 3) + 1;
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}
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static inline u32 getCurrentCoreID(void)
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{
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u32 coreId;
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__asm__ volatile("mrc p15, 0, %0, c0, c0, 5" : "=r"(coreId));
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return coreId & 3;
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}
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u32 convertVAToPA(const void *addr, bool writeCheck);
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u32 safecpy(void *dst, const void *src, u32 len);
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void KObjectMutex__Acquire(KObjectMutex *this);
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void KObjectMutex__Release(KObjectMutex *this);
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void flushEntireDataCache(void);
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void invalidateEntireInstructionCache(void);
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