mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2025-11-11 06:41:26 +01:00
626f0ecb98
- use recursive stage 1 page table (thanks @fincs for this idea) - NULL now unmapped - no identity mapping - image + GICv2 now mapped at the same address for every platform - tempbss mapped just after "real" bss, can now steal unused mem from the latter - no hardcoded VAs for other MMIO devices - tegra: remove timers, use the generic timer instead
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
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* Copyright (c) 2018-2019 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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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#include <string.h>
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#include "utils.h"
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#include "spinlock.h"
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#include "caches.h"
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__attribute__((noinline)) bool overlaps(u64 as, u64 ae, u64 bs, u64 be)
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{
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if(as <= bs && bs < ae)
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return true;
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if(bs <= as && as < be)
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return true;
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return false;
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}
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// TODO: put that elsewhere
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bool readEl1Memory(void *dst, uintptr_t addr, size_t size)
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{
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// Note: what if we read uncached regions/not shared?
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bool valid;
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u64 flags = maskIrq();
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uintptr_t pa = get_physical_address_el1_stage12(&valid, addr);
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restoreInterruptFlags(flags);
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if (!valid) {
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return false;
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}
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memcpy(dst, (const void *)pa, size);
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return true;
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}
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bool writeEl1Memory(uintptr_t addr, const void *src, size_t size)
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{
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bool valid;
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u64 flags = maskIrq();
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uintptr_t pa = get_physical_address_el1_stage12(&valid, addr);
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restoreInterruptFlags(flags);
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if (!valid) {
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return false;
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}
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memcpy((void *)pa, src, size);
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cacheHandleSelfModifyingCodePoU((const void *)pa, size);
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__tlb_invalidate_el1_stage12_local(); //FIXME FIXME FIXME
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__dsb_sy();
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__isb();
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return true;
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}
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