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// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
// Licensed under the Apache License, Version 2.0 (see LICENSE file)
// Official repository: https://github.com/nekernel-org/nekernel
#include <HALKit/POWER/MMU.h>
#include <HALKit/POWER/Processor.h>
#include <KernelKit/DebugOutput.h>
/// @note Refer to SoC documentation.
using namespace Kernel;
EXTERN_C Void hal_write_tlb(UInt32 mas0, UInt32 mas1, UInt32 mas2, UInt32 mas3, UInt32 mas7) {
hal_mtspr(MAS0, mas0);
hal_mtspr(MAS1, mas1);
hal_mtspr(MAS2, mas2);
hal_mtspr(MAS3, mas3);
hal_mtspr(MAS7, mas7);
hal_flush_tlb();
}
EXTERN_C Bool hal_set_tlb(UInt8 tlb, UInt32 epn, UInt64 rpn, UInt8 perms, UInt8 wimge, UInt8 ts,
UInt8 esel, UInt8 tsize, UInt8 iprot) {
if ((hal_mfspr(SPRN_MMUCFG) & MMUCFG_MAVN) == MMUCFG_MAVN_V1 && (tsize & 1)) {
// this MMU does not allow odd tsize values
return false;
}
UInt32 mas0 = FSL_BOOKE_MAS0(tlb, esel, 0);
UInt32 mas1 = FSL_BOOKE_MAS1(1, iprot, 0, ts, tsize);
UInt32 mas2 = FSL_BOOKE_MAS2(epn, wimge);
UInt32 mas3 = FSL_BOOKE_MAS3(rpn, 0, perms);
UInt32 mas7 = FSL_BOOKE_MAS7(rpn);
hal_write_tlb(mas0, mas1, mas2, mas3, mas7);
return true;
}
/// @brief Flush TLB
EXTERN_C void hal_flush_tlb() {
asm volatile("isync;tlbwe;msync;isync");
}
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