From f0acad6f3206079d804b2f59aace0dc32dbeb6dc Mon Sep 17 00:00:00 2001 From: Amlal El Mahrouss Date: Thu, 19 Feb 2026 08:14:48 +0100 Subject: kernel: lots of tweaks and improvements, WIP: ASN, FileMgr support for OpenHeFS. Signed-off-by: Amlal El Mahrouss --- src/kernel/HALKit/POWER/HalVirtualMemory.cpp | 44 ++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 src/kernel/HALKit/POWER/HalVirtualMemory.cpp (limited to 'src/kernel/HALKit/POWER/HalVirtualMemory.cpp') diff --git a/src/kernel/HALKit/POWER/HalVirtualMemory.cpp b/src/kernel/HALKit/POWER/HalVirtualMemory.cpp new file mode 100644 index 00000000..0c954f29 --- /dev/null +++ b/src/kernel/HALKit/POWER/HalVirtualMemory.cpp @@ -0,0 +1,44 @@ +// 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 +#include +#include + +/// @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"); +} -- cgit v1.2.3