Spexeah/Asuro
Spexeah/Asuro
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git-svn-id: https://spexeah.com:8443/svn/Asuro@142 6dbc8c32-bb84-406f-8558-d1cf31a0ab0c
This commit is contained in:
kieron 2017-05-20 16:00:23 +00:00
parent 96e646091b
commit 805f20ca31
8 changed files with 48 additions and 40 deletions
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Asuro.iso
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lib/kernel.ppu
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lib/libpconsole.a
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lib/libpmultiboot.a
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lib/libpsystem.a
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lib/vmemorymanager.ppu
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src/kernel.pas
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@ -54,12 +54,16 @@ begin
pmemorymanager.init(); pmemorymanager.init();
vmemorymanager.init(); vmemorymanager.init();
//
vmemorymanager.new_page(0); vmemorymanager.new_page(0);
pint:= puint32(0); pint:= puint32(0);
console.writestringln('Writing 1234 to Logical Address $00000000'); console.writestringln('Writing 1234 to Logical Address $00000000');
pint^:= 1234; pint^:= 1234;
if pint^ = 1234 then console.writestringln('Read 1234 back from Logical Address $00000000!!!'); if pint^ = 1234 then begin
console.writestringln('Read 1234 back from Logical Address $00000000!!!');
end;
while true do begin end;
//scheduler.init(); //scheduler.init();

48
src/vmemorymanager.pas
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@ -31,6 +31,7 @@ var
procedure init; procedure init;
function new_page(page_number : uint16) : boolean; function new_page(page_number : uint16) : boolean;
function map_page(page_number : uint16; block : uint16) : boolean;
function new_page_at_address(address : uint32) : boolean; function new_page_at_address(address : uint32) : boolean;
procedure free_page(page_number : uint16); procedure free_page(page_number : uint16);
procedure free_page_at_address(address : uint32); procedure free_page_at_address(address : uint32);
@ -57,35 +58,22 @@ var
begin begin
console.writestringln('VMM: INIT BEGIN.'); console.writestringln('VMM: INIT BEGIN.');
PageDirectory:= load_current_page_directory; PageDirectory:= load_current_page_directory;
PageDirectory^[KERNEL_PAGE_NUMBER + 1].Present:= True; map_page(KERNEL_PAGE_NUMBER + 1, 1);
PageDirectory^[KERNEL_PAGE_NUMBER + 1].PageSize:= True; map_page(KERNEL_PAGE_NUMBER + 2, 2);
PageDirectory^[KERNEL_PAGE_NUMBER + 1].Writable:= True;
PageDirectory^[KERNEL_PAGE_NUMBER + 1].Address:= (1 SHL 22);
PageDirectory^[KERNEL_PAGE_NUMBER + 2].Present:= True;
PageDirectory^[KERNEL_PAGE_NUMBER + 2].PageSize:= True;
PageDirectory^[KERNEL_PAGE_NUMBER + 2].Writable:= True;
PageDirectory^[KERNEL_PAGE_NUMBER + 2].Address:= (2 SHL 22);
console.writestringln('VMM: INIT END.'); console.writestringln('VMM: INIT END.');
end; end;
function new_page(page_number : uint16) : boolean; function map_page(page_number : uint16; block : uint16) : boolean;
var var
block : uint16; addr : ubit20;
page : uint16; page : uint16;
rldpd : uint32; rldpd : uint32;
begin begin
new_page:= false; map_page:= false;
if PageDirectory^[page_number].Present then exit;
//if PageDirectory^[page_number].Reserved then exit;
block:= pmemorymanager.new_block(uint32(PageDirectory));
if block < 2 then begin
GPF;
exit;
end else begin
PageDirectory^[page_number].Present:= true; PageDirectory^[page_number].Present:= true;
PageDirectory^[page_number].Address:= block-1; addr:= block;
PageDirectory^[page_number].Address:= addr;
PageDirectory^[page_number].PageSize:= true; PageDirectory^[page_number].PageSize:= true;
PageDirectory^[page_number].Writable:= true; PageDirectory^[page_number].Writable:= true;
rldpd:= uint32(PageDirectory) - KERNEL_VIRTUAL_BASE; rldpd:= uint32(PageDirectory) - KERNEL_VIRTUAL_BASE;
@ -93,7 +81,6 @@ begin
mov eax, rldpd mov eax, rldpd
mov CR3, eax mov CR3, eax
end; end;
new_page:= true;
console.writestringln('New Page Added:'); console.writestringln('New Page Added:');
console.writestring('- P:'); console.writestring('- P:');
@ -102,7 +89,7 @@ begin
console.writehexln(block); console.writehexln(block);
console.writestring('- P:['); console.writestring('- P:[');
console.writeword(page_number SHL 22); console.writehex(page_number SHL 22);
console.writestring(' - '); console.writestring(' - ');
console.writehex(((page_number+1) SHL 22)); console.writehex(((page_number+1) SHL 22));
console.writestring(']-->B:['); console.writestring(']-->B:[');
@ -110,6 +97,23 @@ begin
console.writestring(' - '); console.writestring(' - ');
console.writehex(((block+1) SHL 22)); console.writehex(((block+1) SHL 22));
console.writestringln(']'); console.writestringln(']');
map_page:= true;
end;
function new_page(page_number : uint16) : boolean;
var
block : uint16;
begin
new_page:= false;
if PageDirectory^[page_number].Present then exit;
if PageDirectory^[page_number].Reserved then exit;
block:= pmemorymanager.new_block(uint32(PageDirectory));
if block < 2 then begin
GPF;
exit;
end else begin
new_page:= map_page(page_number, block);
end; end;
end; end;