chore: start work on new 'mm'

Makefile

@@ -1,5 +1,7 @@
 .EXPORT_ALL_VARIABLES:
 
+MAKEFLAGS += --no-print-directory
+
 TOPDIR     := $(dir $(realpath $(lastword $(MAKEFILE_LIST))))
 SYSROOTDIR := $(TOPDIR)/sysroot
 TOOLSDIR   := $(TOPDIR)/tools
@@ -30,7 +32,7 @@ QEMU_COMMON = \
 		-serial stdio \
 		-monitor telnet::4545,server,nowait \
 		-net nic,model=ne2k_isa \
-		-machine isapc
+		-machine isapc 
 
 SUBDIRS	:= external tools include boot kernel modules lib bin
 

boot/intro.txt

@@ -12,7 +12,7 @@ Section: Legacy
 > +------------+       +-------------+       +--------------+
 >
 
-About: Memory Map
+About: Real Mode Memory Map
 
 >
 > 0x100000 +-----------------------+

boot/loader/loader.asm

@@ -214,6 +214,9 @@ szMsgErrorNotFound db "ERROR: kernel not found", 0
 	; =========================================================================
 	; protected mode code
 	; =========================================================================
+
+	;; subroutine: multiboot
+	;; This subroutine handle multiboot structures and convert them to <BootInfo>
 multiboot:
 	; https://www.gnu.org/software/grub/manual/multiboot/multiboot.html#Machine-state
 
@@ -223,7 +226,8 @@ multiboot:
 
 	; get kernel from module
 
-
+	;; subroutine: common32
+	;; This subroutine move kernel to 0x100000 and setup temporary pagging then jump to kernel code.
 common32:
 	mov [0xB8000], dword 0x07690748
 
@@ -242,15 +246,31 @@ common32:
 	or edx, (PTE_P or PTE_W)
 	mov [edi], edx
 	add edi, 4
-	add esi, 4096
+	add esi, PAGE_SIZE
 	inc ecx
 	cmp ecx, 1024
 	jb @b
-	
+
+	; map 4mb right after kernel (for now we assume there is enough memory)
+	mov edi, boot_kernel_paging_table
+	xor ecx, ecx
+@@:
+	mov edx, esi
+	or edx, (PTE_P or PTE_W)
+	mov [edi], edx
+	add edi, 4
+	add esi, PAGE_SIZE
+	inc ecx
+	cmp ecx, 1024
+	jb @b
+
+	; add entries to page directory 	
 	mov dword [boot_page_directory], boot_0_page_table + (PDE_P or PDE_W) ; present and writable
 
 	mov dword [boot_page_directory + (768 * 4)], boot_0_page_table + (PDE_P or PDE_W)
 
+	mov dword [boot_page_directory + (769 * 4)], boot_kernel_paging_table + (PDE_P or PDE_W)
+
 	mov eax, boot_page_directory
 	mov cr3, eax
 
@@ -278,7 +298,12 @@ inode_cache rb sizeof.Inode
 boot_page_directory:
 	rb 4096
 
+	; we asume kernel is less than 4mb
 boot_0_page_table:
 	rb 4096
 
+	; We map 4mb after kernel for future kernel page table/directory
+boot_kernel_paging_table:
+	rb 4096
+
 _end:

docs/config/Comments.txt

@@ -0,0 +1,90 @@
+Format: 2.3
+
+# This is the Natural Docs comments file for this project.  If you change
+# anything here, it will apply to THIS PROJECT ONLY.  You can edit the version
+# in Natural Docs' Config folder to make the changes apply to all projects,
+# but it's recommended that you edit this version instead.
+
+
+# Ignored Keywords
+# ------------------------------------------------------------------------
+
+# If you'd like to prevent keywords from being recognized by Natural Docs,
+# you can do it like this:
+#
+# Ignore Keywords:
+#    [keyword]
+#    [keyword]
+#    ...
+
+
+# Comment Types
+# ------------------------------------------------------------------------
+# The syntax reference is after the definitions.
+
+Alter Comment Type: Macro
+
+   Keywords:
+      equ
+
+
+# Each Natural Docs comment has a corresponding type which determine its
+# behavior.  You can define your own here or override the settings of the
+# existing ones.
+#
+# Comment Type: [name]
+# Alter Comment Type: [name]
+#    Creates a new comment type or changes an existing one.
+#
+# Display Name: [name]
+# Plural Display Name: [name]
+#    The singular and plural name of the comment type as it should appear in
+#    the output.
+#
+# Simple Identifier: [name]
+#    The name of the comment type using only the letters A to Z.  No spaces,
+#    numbers, symbols, or Unicode allowed.  Defaults to the comment type name
+#    minus any unacceptable characters.  This is used to generate things like
+#    CSS class names.
+#
+# Scope: [normal|start|end|always global]
+#    How the comment affects scope.  Defaults to normal.
+#    normal        - The comment stays within the current scope.
+#    start         - The comment starts a new scope for all the comments
+#                    beneath it, like class comments.
+#    end           - The comment resets the scope back to global for all the
+#                    comments beneath it, like section comments.
+#    always global - The comment is defined as a global symbol, but does not
+#                    change the scope for any other comments.
+#
+# Flags: [flag], [flag], ...
+#    A combination of settings that apply to the comment type.
+#    Code, File, or Documentation
+#        Whether it's used to describe a code element, a file, or is a
+#        standalone documentation comment.  Defaults to Code.
+#    Variable Type
+#        Whether it describes a code element that can be used as a variable's
+#        type.
+#    Class Hierarchy or Database Hierarchy
+#        Whether it describes a code element that should be included in the
+#        class or database hierarchy.  Requires Scope: Start.
+#    Enum
+#        Whether it describes an enum.
+#
+# Keywords:
+#    [keyword]
+#    [keyword], [plural keyword]
+#    ...
+#    A list of the comment type's keywords.  Each line after the heading is
+#    the keyword and optionally its plural form for list comments.  You can
+#    reuse existing keywords to change their definition.  When using
+#    "Alter Comment Type", these keywords are added to the existing ones
+#    rather than replacing them.
+#
+# [Language] Keywords:
+#    [keyword]
+#    [keyword], [plural keyword]
+#    ...
+#    A list of keywords that only apply to the comment type when using a
+#    specific programming language.  Each line after the heading is the
+#    keyword and optionally its plural form for list comments.

docs/config/Menu.txt

@@ -20,7 +20,7 @@ Timestamp: Updated yyyy/mm/dd
 # These are indexes you deleted, so Natural Docs will not add them again
 # unless you remove them from this line.
 
-Don't Index: Variables, Macros, Classes
+Don't Index: Macros, Classes, Variables
 
 
 # --------------------------------------------------------------------------
@@ -139,8 +139,11 @@ Group: Kernel  {
 
    Group: Memory Manager  {
 
-      File: mm.inc  (kernel/mm/mm.inc)
+      File: bootstrap.inc  (kernel/mm/bootstrap.inc)
-      File: pmm.inc  (kernel/mm/pmm.inc)
+      File: Introduction  (kernel/mm/intro.txt)
+      File: mm.inc  (kernel/mm/mm.old.inc)
+      File: pmm.inc  (kernel/mm/pmm.old.inc)
+      File: PMMFreeRange  (kernel/mm/pmm.new.inc)
       }  # Group: Memory Manager
 
    File: lock.inc  (kernel/lock.inc)

docs/config/Project.txt

@@ -0,0 +1,215 @@
+Format: 2.3
+
+# This is the main file you use to configure Natural Docs for your project.
+
+
+# Project Information
+# ------------------------------------------------------------------------
+
+Title: StupidOS
+Subtitle: 32-bit Operating System written in x86 assembly.
+
+Copyright: Copyright © 2024 d0p1
+
+Timestamp: Updated yyyy/mm/dd
+#    m     - Single digit month, when possible.  January is "1".
+#    mm    - Always double digit month.  January is "01".
+#    mon   - Short month word.  January is "Jan".
+#    month - Long month word.  January is "January".
+#    d     - Single digit day, when possible.  1 is "1".
+#    dd    - Always double digit day.  1 is "01".
+#    day   - Day with text extension.  1 is "1st".
+#    yy    - Double digit year.  2022 is "22".
+#    yyyy  - Four digit year.  2022 is "2022".
+#    year  - Four digit year.  2022 is "2022".
+
+
+# This is where you put general information about your project.  None of these
+# settings are required, though Title is recommended.
+#
+# Title: [text]
+#    The name of your project.  (R) and (TM) will be converted to their
+#    respective symbols.
+#
+# Subtitle: [text]
+#    A subtitle for your project, if desired.
+#
+# Copyright: [text]
+#    The copyright notice for your project.  (C) will be converted to the
+#    copyright symbol.
+#
+# Timestamp: [text]
+#    Text explaining when the documentation was generated, such as "Last
+#    Updated Month Day Year", if you want that to be included.  The following
+#    substitutions are performed:
+#
+#    m     - Single digit month, when possible.  January is "1".
+#    mm    - Always double digit month.  January is "01".
+#    mon   - Short month word.  January is "Jan".
+#    month - Long month word.  January is "January".
+#    d     - Single digit day, when possible.  1 is "1".
+#    dd    - Always double digit day.  1 is "01".
+#    day   - Day with text extension.  1 is "1st".
+#    yy    - Double digit year.  2022 is "22".
+#    yyyy  - Four digit year.  2022 is "2022".
+#    year  - Four digit year.  2022 is "2022".
+#
+# Style: [style]
+#    A custom style to apply to the generated documentation.  See
+#    https://naturaldocs.org/reference/styles for more information.
+#
+# Home Page: [file]
+#    A custom home page for the generated documentation.  It could be a
+#    documented file in one of the source folders or a HTML file in any
+#    location.
+#
+# Encoding: [name or code page number]
+# Encoding: [name or code page number] *.[extension]
+#    The character encoding source files use if it is something other than
+#    Unicode.  It can be specified as a name such as "iso-8859-1" or a code
+#    page number such as "28591".  You can see the list of encodings your
+#    system supports by running Natural Docs with the --list-encodings command
+#    line option.
+#
+#    Natural Docs defaults to Unicode which will handle all forms of UTF-8,
+#    UTF-16, and UTF-32.  You can set a new default for all files or you can
+#    limit it to an extension such as "*.txt".  You can use multiple Encoding
+#    lines to cover all the extensions that need them.
+#
+#    You can also set encodings for specific folders by adding Encoding lines
+#    in Source Folder sections.
+
+
+# Source Code
+# ------------------------------------------------------------------------
+
+Source Folder: ..\..
+   Name: StupidOS
+
+
+# This is where you tell Natural Docs which folders it should scan for source
+# files.  If you add any on the command line this section is ignored except
+# for the properties of the ones from the command line.
+#
+# Source Folder: [folder]
+#    Specifies a folder which will be searched for source files.  The path is
+#    relative to the project configuration folder, which lets this file remain
+#    portable across computers and not cause problems in version control
+#    systems.  You can enter an absolute path and it will be converted
+#    automatically.
+#
+#    Additional properties can be added after each source folder:
+#
+#    Name: [name]
+#       How this source folder will appear in the menu if you have more than
+#       one.
+#
+#    Encoding: [name or code page number]
+#    Encoding: [name or code page number] *.[extension]
+#    Encoding: [name or code page number] [folder]
+#    Encoding: [name or code page number] [folder]\*.[extension]
+#       The character encoding source files use if it's something other than
+#       Unicode.  It can be specified as a name such as "iso-8859-1" or a code
+#       page number such as "28591".  You can see the list of encodings your
+#       system supports by running Natural Docs with the --list-encodings
+#       command line option.
+#
+#       Natural Docs defaults to Unicode which will handle all forms of UTF-8,
+#       UTF-16, and UTF-32.  You can set a new default for all files in this
+#       folder, limit it to an extension such as "*.txt", limit it to a
+#       subfolder, or limit it to extensions in a subfolder.  You can use
+#       multiple Encoding lines to cover all the subfolders and extensions
+#       that need them.
+
+
+# Source Filtering
+# ------------------------------------------------------------------------
+
+Ignore Source Folder: ..\..\sysroot
+
+
+# If there are any subfolders in the source code that you would like Natural
+# Docs to ignore they can be added here.  If you use any of these options on
+# the command line this section is ignored.
+#
+# Ignore Source Folder: [folder]
+#    Tells Natural Docs to skip this folder when scanning files.
+#
+# Ignore Source Folder Pattern: [pattern]
+#    Tells Natural Docs to skip all folder names which match this pattern when
+#    scanning files.  ? matches a single character, * matches zero or more
+#    characters.  It applies to the entire folder name, so "cli" will not
+#    match "client", although "cli*" will.
+#
+#    The data folders of common version control systems (.git, .svn, .cvs, .hg)
+#    are ignored automatically.  You don't have to add them here.
+
+
+# Images
+# ------------------------------------------------------------------------
+
+Image Folder: ..\img
+
+
+# This is where you tell Natural Docs which folders it should look for images
+# in.  When you put something like (see diagram.jpg) in a comment Natural Docs
+# will look for it relative to the source file it appears in plus any folders
+# added here.  If you add any on the command line this section is ignored.
+#
+# Image Folder: [folder]
+#    Specifies a folder which will be searched for image files.  The path is
+#    relative to the project configuration folder, which lets this file remain
+#    portable across computers and not cause problems in version control
+#    systems.  You can enter absolute paths and they will be converted
+#    automatically.
+
+
+
+# Generated Documentation
+# ------------------------------------------------------------------------
+
+HTML Output Folder: ..\html
+
+
+# This is where you tell Natural Docs what kind of documentation you want
+# built and where it should be put.  If you use any of these options on the
+# command line this section is ignored except for the properties of the ones
+# from the command line.
+#
+# HTML Output Folder: [folder]
+#    Generates HTML documentation in the specified folder.  The path is
+#    relative to the project configuration folder, which lets this file remain
+#    portable across computers and not cause problems in version control
+#    systems.  You can enter an absolute path and it will be converted
+#    automatically.
+#
+#    Additional properties can be added after each output folder:
+#
+#    Title: [text]
+#    Subtitle: [text]
+#    Copyright: [text]
+#    Timestamp: [text]
+#    Style: [style]
+#    Home Page: [file]
+#       These properties can be overridden for just this output folder, which
+#       allows you to have multiple output folders with different styles or
+#       titles.  See the Project Information section for descriptions of them.
+
+
+# Global Settings
+# ------------------------------------------------------------------------
+
+# Other settings that apply to your entire project.  Settings specified on the
+# command line override the settings here.
+#
+# Tab Width: [width]
+#    The number of spaces tabs should be expanded to.
+#
+# Documented Only: [yes|no]
+#    Whether only documented code elements should appear in the output.
+#    Defaults to no.
+#
+# Auto Group: [yes|no]
+#    Whether groups should automatically apply to you code.  Defaults to yes.
+
+

kernel/Makefile

@@ -15,8 +15,8 @@ KERNEL	= vmstupid.sys
 SRCS	= kernel.asm \
 			const.inc \
 			klog.inc \
-			mm/mm.inc \
+			mm/mm.old.inc \
-			mm/pmm.inc \
+			mm/pmm.old.inc \
 			lock.inc \
 			gdt.inc \
 			isr.inc \

kernel/kernel.asm

@@ -117,7 +117,7 @@ kmain:
 	include 'klog.inc'
 	include 'dev/console.inc'
 	include 'dev/dev.inc'
-	include 'mm/mm.inc'
+	include 'mm/mm.old.inc'
 	include 'lock.inc'
 	include 'gdt.inc'
 	include 'syscall.inc'

kernel/mm/bootstrap.inc

@@ -0,0 +1,7 @@
+	;; File: bootstrap.inc
+	;; Bootstrap whole PMM and MM
+
+	;; Function: mm_bootstrap
+	;; Setup recursive page dir at 0xFFFFF000 and temporary identity map first 3GB
+mm_bootstrap:
+	ret

kernel/mm/intro.txt

@@ -0,0 +1,2 @@
+File: Introduction
+

kernel/mm/mm.old.inc

@@ -27,7 +27,7 @@
 	;; > 0x00000000 +---------------+
 	;;
 
-include "pmm.inc"
+include "pmm.old.inc"
 include "../sys/mmu.inc"
 
 	;; Macro: KV2P

kernel/mm/pmm.new.inc

@@ -0,0 +1,7 @@
+	;; Struc: PMMFreeRange
+struc PMMFreeRange {
+	.size dd ?
+	.next dd ?
+}
+
+pPMMFreeListHead dd 0

kernel/sys/mmu.inc

@@ -68,3 +68,6 @@ PTE_A   = 0x020
 PTE_D   = 0x040
 PTE_PAT = 0x080
 PTE_G   = 0x100
+
+	;; PAGE_SIZE: Page size (4Kib)
+PAGE_SIZE = 4096

kernel/vfs.inc

@@ -4,20 +4,30 @@
 	;; - <https://www.cs.fsu.edu/~awang/courses/cop5611_s2024/vnode.pdf>
 	;;
 
+	;; Struc: VFS
+	;; 
+	;; .name - Filesystem name
+	;; .next - pointer to next VFS
+	;; .ops  - pointer to VFS function
 struc VFS {
-	.name   dd ?
+	.name    dd ?
-	.next   dd ?
+	.next    dd ?
-	.op     dd ?
+	.ops_ptr dd ?
 }
 DEFN VFS
 
+	;; Struc: Mount
+	;;
+	;; .next    - address of next mount
+	;; .ops_ptr - address of mount ops
+	;; .vnodes  -  
 struc Mount {
-	.next   dd ?
+	.next    dd ?
-	.op     dd ?
+	.ops_ptr dd ?
-	.vnodes dd ?
+	.vnodes  dd ?
-	.flag   dd ?
+	.flag    dd ?
-	.bsize  dd ?
+	.bsize   dd ?
-	.data   dd ?
+	.data    dd ?
 }
 
 struc VFSOps {
@@ -30,6 +40,9 @@ struc VFSOps {
 	.vget   dd ?
 }
 
+macro VNODE_TYPE name,value {
+VNODE_TYPE_#name equ value
+}
 	;; Constants: vnode types
 	;;
 	;; VNODE_TYPE_NON  - XXX
@@ -40,14 +53,14 @@ struc VFSOps {
 	;; VNODE_TYPE_LNK  - XXX
 	;; VNODE_TYPE_SOCK - XXX
 	;; VNODE_TYPE_BAD  - XXX
-VNODE_TYPE_NON  = 0x0
+VNODE_TYPE NON, 0x0
-VNODE_TYPE_REG  = 0x1
+VNODE_TYPE REG, 0x1
-VNODE_TYPE_DIR  = 0x2
+VNODE_TYPE DIR, 0x2
-VNODE_TYPE_BLK  = 0x3
+VNODE_TYPE BLK, 0x3
-VNODE_TYPE_CHR  = 0x4
+VNODE_TYPE CHR, 0x4
-VNODE_TYPE_LNK  = 0x5
+VNODE_TYPE LNK, 0x5
-VNODE_TYPE_SOCK = 0x6
+VNODE_TYPE SOCK, 0x6
-VNODE_TYPE_BAD  = 0x7
+VNODE_TYPE BAD, 0x7
 
 	;; Struc: VNode
 struc VNode {

releasetools/efiimage.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+set -e
+
+: "${IMG=stupidos_efi.img}"
+: "${EFI_PART_SIZE=1000000}" # 1Mb
+
+if [ ! -f Makefile ]
+then
+	exit 1
+fi
+
+. ./releasetools/image.defaults
+. ./releasetools/image.functions
+
+DESTDIR=${BUILDDIR}/hd
+export DESTDIR
+
+if [ -f "${IMG}" ]
+then
+	rm -f "${IMG}"
+fi
+
+mkdir -p "${BUILDDIR}" "${OBJ}"
+
+mkdir -p "${DESTDIR}/boot"
+
+create_stpdboot_ini "${DESTDIR}/boot"
+
+make
+
+echo ""
+echo "Disk image at $(pwd)/${IMG}"

releasetools/hdimage.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
-: "${IMG=disk.img}"
+: "${IMG=stupidos_hd.img}"
 
 if [ ! -f Makefile ]
 then

releasetools/image.functions

@@ -35,6 +35,7 @@ get_grub()
 
 create_efi_image()
 {
+	
 	echo
 }
 
@@ -46,9 +47,13 @@ create_stpdboot_ini()
 	stupid_ini="$(cat <<EOF
 CMDLINE=consdev=com0
 MODULE=dummy.mod
-MODULE=dummy2.mod
 EOF
 )"
 
 	echo "$stupid_ini" > "${target}/stupid.ini"
 }
+
+create_hd_image()
+{
+	
+}