chore: add DevSE webring

.gitignore

@@ -33,3 +33,5 @@ bochsrc.bxrc
 *.EFI
 *.fd
 *.mod
+webring.json
+webring.txt

Makefile

@@ -112,6 +112,8 @@ run-efi: all OVMF32.fd
 .PHONY: docs
 docs:
 	@mkdir -p docs/html
+	wget -O docs/webring.json https://webring.devse.wiki/webring.json
+	python3 docs/devsewebring.py docs/webring.json docs/webring.txt
 	naturaldocs -p docs/config -img docs/img -xi sysroot -i . -ro -o HTML docs/html
 	cp docs/img/favicon.ico docs/html/
 

docs/devsewebring.py

@@ -0,0 +1,14 @@
+import sys
+import json
+
+if __name__ == '__main__':
+    source = sys.argv[1]
+    dest = sys.argv[2]
+
+    data = None
+    with open(source, "r") as f:
+        data = json.load(f)
+    with open(dest, "w") as f:
+        f.write("File: Webring\n\n")
+        for entry in data:
+            f.write(f"- <{entry['name']} at {entry['protocols']['http']['clearnet']}> : {entry['description']}\n\n")

kernel/gdt.inc

@@ -0,0 +1,32 @@
+
+gdt:
+	; null descriptor
+	dd 0
+	dd 0
+
+	; kernel code descriptor
+	dw 0xFFFF, 0x0000
+	db 0x00, 0x9a, 0xCF, 0x00
+
+	; kernel data descriptor
+	dw 0xFFFF, 0x0000
+	db 0x00, 0x92, 0xCF, 0x00
+
+	; user code descriptor
+	dw 0xFFFF, 0x0000
+	db 0x00, 0xFA, 0xCF, 0x00
+
+	; user data descriptor
+	dw 0xFFFF, 0x0000
+	db 0x00, 0xF2, 0xCF, 0x00
+
+	; Tss
+;.tss:
+;	dw ?
+;	dd ?
+
+.end:
+	
+pGDT:
+	dw gdt.end - gdt - 1
+	dd gdt

kernel/kernel.asm

@@ -52,8 +52,6 @@ kmain:
 	add ebx, KERNEL_VIRT_BASE
 	call pmm_free_range
 
-	; map whole memory
-
 	;  idt, gdt
 
 

kernel/mm/pmm.inc

@@ -1,16 +1,15 @@
 	;; File: pmm.inc
 
 macro ALIGN reg {
-	local end
+	local ..end
 
 	push reg
 	and reg, 0xFFF
 	pop reg
-	jz end
+	jz ..end
 	and reg, 0xFFFFF000
 	add reg, 0x1000
-end:
+..end:
-
 }
 
 	;; Function: pmm_init
@@ -37,6 +36,10 @@ pmm_alloc_page:
 	mov eax, [pFreeList]
 	mov edx, [eax]
 	mov [pFreeList], edx
+
+	inc [cUsedPage]
+	dec [cFreePage]
+
 	ret
 .error:
 	mov esi, szErrorNoMemLeft
@@ -55,11 +58,13 @@ pmm_free_page:
 	mov edx, [pFreeList]
 	mov [eax], edx
 	mov [pFreeList], eax
+
+	inc [cFreePage]
+	dec [cUsedPage]
 @@:
 	ret
 
 	;; Function: pmm_free_range
-	;; TODO: allignment 
 	;;
 	;; In:
 	;;    EAX - Start
@@ -84,11 +89,20 @@ pmm_free_range:
 	mov [esi], eax
 	mov [pFreeList], esi
 
+	inc [cTotalPage]
+	inc [cFreePage]
+
 	add esi, 4096
 	cmp esi, [ebp-8]
 	jb .loop
 
 
+	push dword [cFreePage]
+	push dword [cUsedPage]
+	push dword [cTotalPage]
+	mov esi, szMsgPmmStats
+	call klog
+
 	leave
 	ret
 
@@ -96,3 +110,9 @@ pFreeList dd 0
 szMsgPmmInit      db "PMM: initialize", 0
 szMsgPmmFreeRange db "PMM: add free memory range %x - %x", 0
 szErrorNoMemLeft  db "Error: no free memory left", 0
+szMsgPmmStats     db "PMM: Total page: %x | Used page: %x | Free page: %x", 0
+
+; Some stats
+cFreePage  dd 0
+cUsedPage  dd 0
+cTotalPage dd 0