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112 lines
4.1 KiB
C
112 lines
4.1 KiB
C
//----------------------------------------------------------------------------//
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// GNU GPL OS/K //
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// //
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// Desc: Mapping and checking memory related functions //
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// //
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// //
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// Copyright © 2018-2019 The OS/K Team //
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// //
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// This file is part of OS/K. //
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// //
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// OS/K 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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// any later version. //
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// //
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// OS/K 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 OS/K. If not, see <https://www.gnu.org/licenses/>. //
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//----------------------------------------------------------------------------//
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#include <mm/mm.h>
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//Tss_t tssEntry = { 0 };
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GdtPtr_t gdtPtr;
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/* static void SetGdtEntry(int index, uint base, uint limit, uchar access) */
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/* { */
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/* gdtEntries[index].lowBase = (base & 0xFFFF); */
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/* gdtEntries[index].middleBase = (base >> 16) & 0xFF; */
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/* gdtEntries[index].highBase = (base >> 24) & 0xFF; */
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/* gdtEntries[index].lowLimit = (limit & 0xFFFF); */
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/* gdtEntries[index].granularity = (limit >> 16) & 0x0F; */
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/* gdtEntries[index].granularity |= 0xA0; */
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/* // 0x10 is system */
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/* // 0x80 is present */
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/* gdtEntries[index].access = access | 0x10 | 0x80; */
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/* } */
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/* static void SetTssEntry(uchar index, ulong base, ulong limit) */
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/* { */
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/* TssDescriptor_t tssDesc = { 0 }; */
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/* tssDesc.limitLow = limit & 0xffff; */
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/* tssDesc.size = (limit >> 16) & 0xf; */
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/* tssDesc.base00 = base & 0xffff; */
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/* tssDesc.base16 = (base >> 16) & 0xff; */
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/* tssDesc.base24 = (base >> 24) & 0xff; */
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/* tssDesc.base32 = (base >> 32) & 0xffffffff; */
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/* tssDesc.reserved = 0; */
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/* tssDesc.access = 0x01 | 0x08 | 0x10 | 0x80; */
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/* memmove(&gdtEntries[index], &tssDesc, sizeof(TssDescriptor_t)); */
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/* } */
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void MmInitGdt(void)
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{
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MmStoreGdt();
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GdtEntry_t *gdt = (GdtEntry_t *)(gdtPtr.base);
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extern ulong GDT64;
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DebugLog("GDT ADDR: %p\n",
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gdt
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);
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gdt++;
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DebugLog("GDT : \n"
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"lowLimit : %#016hx\n"
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"lowBase : %#016hx\n"
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"middleBase: %#016hx\n"
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"access : %#016hx\n"
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"flags : %#016hx\n"
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"highBase : %#016hx\n",
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gdt->lowLimit,
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gdt->lowBase,
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gdt->middleBase,
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gdt->access,
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gdt->flags,
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gdt->highBase
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);
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/* DebugLog("GDT : \n" */
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/* "lowLimit : %#016hx\n" */
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/* "lowBase : %#016hx\n" */
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/* "middleBase: %#016hx\n" */
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/* "access : %#016hx\n" */
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/* "flags : %#016hx\n" */
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/* "highBase : %#016hx\n", */
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/* gdt->lowLimit, */
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/* gdt->lowBase, */
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/* gdt->middleBase, */
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/* gdt->access, */
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/* gdt->flags, */
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/* gdt->highBase */
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/* ); */
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MmLoadGdt();
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}
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