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Working on page allocator #67

This commit is contained in:
Adrien Bourmault 2020-01-12 17:21:12 +01:00
parent 3676254417
commit d056bc2fb6
6 changed files with 96 additions and 19 deletions
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6
ProjectTree
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@ -70,9 +70,11 @@
│   │   ├── buf.h
│   │   └── list.h
│   ├── mm
│   │   ├── gdt.h
│   │   ├── heap.h
│   │   ├── malloc.h
│   │   └── mm.h
│   │   ├── map.h
│   │   └── paging.h
│   ├── po
│   │   └── shtdwn.h
│   ├── sh
@ -155,4 +157,4 @@
├── ProjectTree
└── README.md
28 directories, 102 files
28 directories, 104 files

1
include/mm/paging.h
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@ -33,6 +33,7 @@
#define KPAGESIZE (4 * KB)
#define UPAGESIZE (4 * KB)
#define USERSPACE 0x80000000
//----------------------------------------------------------------------------//

38
include/mm/palloc.h Normal file
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@ -0,0 +1,38 @@
//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: Page allocator related functions //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#ifndef _KERNEL_H
#include <kernel.h>
#endif
#ifndef _MM_PALLOC_H
#define _MM_PALLOC_H
//----------------------------------------------------------------------------//
//----------------------------------------------------------------------------//
#endif

24
kaleid/kernel/mm/paging.c
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@ -20,20 +20,18 @@
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------//
#include <kernel.h>
#include <init/boot.h>
#include <ke/idt.h>
#include <ex/malloc.h>
#include <mm/heap.h>
#include <mm/paging.h>
#include <mm/map.h>
#include <ke/idt.h>
#include <lib/buf.h>
#include <io/vga.h>
#define USERSPACE 0x80000000
//-----------
pml4_t MmPageMapLevel4[512] __attribute__((__aligned__(KPAGESIZE)));
@ -194,16 +192,16 @@ void MmInitPaging(void)
//DebugLog("\tLast page of kernel at %p\n", curAddrPT);
}
}
// While we're inside the userspace pages
else if ((ulong)curAddrPT >= USERSPACE) {
MmPT[index] = ((ulong)curAddrPT - diffKernUsr) | PRESENT; // Not present for instance
xedni = (((ulong)curAddrPT - diffKernUsr) / ((ulong)KPAGESIZE));
//MmPhysicalPageTable[xedni] = (ulong)curAddrPT;
/* // While we're inside the userspace pages */
/* else if ((ulong)curAddrPT >= USERSPACE) { */
/* MmPT[index] = ((ulong)curAddrPT - diffKernUsr) | PRESENT; // Not present for instance */
/* xedni = (((ulong)curAddrPT - diffKernUsr) / ((ulong)KPAGESIZE)); */
/* //MmPhysicalPageTable[xedni] = (ulong)curAddrPT; */
if ((ulong)curAddrPT == USERSPACE) {
DebugLog("\tUserspace at %p:%p\n", curAddrPT, curAddrPT - diffKernUsr);
}
}
/* if ((ulong)curAddrPT == USERSPACE) { */
/* DebugLog("\tUserspace at %p:%p\n", curAddrPT, curAddrPT - diffKernUsr); */
/* } */
/* } */
else {
MmPT[index] = 0;
}

38
kaleid/kernel/mm/palloc.c Normal file
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@ -0,0 +1,38 @@
//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: Page allocator related functions //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#include <kernel.h>
#include <init/boot.h>
#include <ex/malloc.h>
#include <mm/paging.h>
#include <mm/palloc.h>
#include <io/vga.h>
//---------
//---------

8
kaleid/kernel/sh/testcmds.c
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@ -263,13 +263,13 @@ error_t CmdPageBlock(int argc, char **argv, char *cmdline)
error_t CmdPF(int argc, char **argv, char *cmdline)
{
ulong *address = (ulong*)(ulong)strtoul(argv[1], NULL, 16);
register ulong *address = (ulong*)(ulong)strtoul(argv[1], NULL, 16);
KernLog("Provoking Page Fault at %#x\n", address);
KernLog("Test provoking a fault at %p\n", address);
KernLog("It contained %#x\n", *address);
KernLog("It contained %p\n", *address);
*address = 1;
KernLog("Now it contains %#x\n", *address);
KernLog("Now it contains %p\n", *address);
KernLog("No page fault : address was valid/present\n");