doc: document fatfs

include/Makefile

@@ -1,4 +1,6 @@
 INCS = coff.h elf.h
+SYSINCS = sys/errno.h
+INCSYSDIR = $(INCDIR)/sys
 
 .PHONY: all
 all:
@@ -7,8 +9,10 @@ all:
 clean:
 
 .PHONY: install
-install: $(INCS)
+install: $(INCS) $(INCSYSDIR)
 	@ mkdir -p $(DESTDIR)$(INCDIR)
-	install $< $(DESTDIR)$(INCDIR)
+	install $(INCS) $(DESTDIR)$(INCDIR)
+	@ mkdir -p $(DESTDIR)$(INCSYSDIR)
+	install $(SYSINCS) $(DESTDIR)$(INCSYSDIR)
 
 .PHONY: all clean install

kernel/Makefile

@@ -2,6 +2,15 @@ AS	= fasm
 RM	= rm -f
 INSTALL = install
 
+ASMINCS = sys/bootinfo.inc \
+			sys/coff.inc \
+			sys/cpu.inc \
+			sys/errno.inc \
+			sys/macro.inc \
+			sys/mmu.inc \
+			sys/process.inc \
+			sys/register.inc
+
 KERNEL	= vmstupid.sys
 SRCS	= kernel.asm \
 			const.inc \
@@ -23,7 +32,9 @@ SRCS	= kernel.asm \
 			fs/fat.inc \
 			fs/stpdfs.inc \
 			fs/xv6fs.inc \
-			vfs.inc
+			vfs.inc \
+			proc.inc \
+			$(ASMINCS)
 
 .PHONY: all
 all: $(KERNEL)
@@ -42,6 +53,8 @@ clean:
 .PHONY: install
 install: $(KERNEL)
 	@ mkdir -p $(DESTDIR)
-	install $< $(DESTDIR)
+	install $(KERNEL) $(DESTDIR)
+	@ mkdir -p $(DESTDIR)$(ASMDIR)/sys
+	install $(ASMINCS) $(DESTDIR)$(ASMDIR)/sys
 
 .PHONY: all clean install

kernel/dev/at/com.inc

@@ -40,3 +40,7 @@ com_irq2:
 	pusha
 	popa
 	iret
+
+com_device:
+	db 'com', 0, 0, 0, 0, 0
+	dd com_init

kernel/dev/at/ne2k.inc

@@ -78,3 +78,7 @@ ne2k_probe:
 
 ne2k_irq:
 	iret
+
+ne2k_device:
+	db 'ne2k', 0, 0, 0, 0
+	dd ne2k_init

kernel/dev/dev.inc

@@ -38,6 +38,8 @@ aDevices:
 	dd floppy_device
 	dd kbd_device
 	dd console_device
+	dd com_device
+	dd ne2k_device
 .end:
 
 dev_init:

kernel/fs/fat.inc

@@ -60,6 +60,12 @@ struc FATFS_BootSector32 {
 }
 DEFN FATFS_BootSector32
 
+	;; Struc: FATFS_Dirent
+	;; FAT Filesystem directory entry
+	;;
+	;; .name - Filename
+	;; .ext  - File extension
+	;; .attr - See <FATFS file attributes>
 struc FATFS_Dirent {
 	.name           db 8 dup(?)
 	.ext            db 3 dup(?)
@@ -77,6 +83,21 @@ struc FATFS_Dirent {
 }
 DEFN FATFS_Dirent
 
+	;; Enum: FATFS file attributes
+	;;
+	;; FATFS_ATTR_READ_ONLY - Mark file as read-only
+	;; FATFS_ATTR_HIDDEN    - TODO
+	;; FATFS_ATTR_SYSTEM    - TODO
+	;; FATFS_ATTR_VOLUME_ID - The corresponding entry contains the volume label.
+	;; FATFS_ATTR_DIRECTORY - The corresponding entry represents a directory
+	;; FATFS_ATTR_ARCHIVE   - TODO
+FATFS_ATTR_READ_ONLY = 0x01
+FATFS_ATTR_HIDDEN    = 0x02
+FATFS_ATTR_SYSTEM    = 0x04
+FATFS_ATTR_VOLUME_ID = 0x08
+FATFS_ATTR_DIRECTORY = 0x10
+FATFS_ATTR_ARCHIVE   = 0x20
+
 	; ------------------------------------------------------------------------
 
 	;; Section: Implementation

kernel/heap.inc

@@ -1,4 +1,20 @@
 	;; File: heap.inc
+	;; Base on <https://github.com/CCareaga/heap_allocator/blob/master/commented_heap.c>
+
+struc HeapNode {
+	.hole dd ?
+	.size dd ?
+	.next dd ?
+	.prev dd ?
+}
+DEFN HeapNode
+
+struc HeapInfo {
+	.start dd ?
+	.end   dd ?
+	.bins  dd 9 dup(?)
+}
+DEFN HeapInfo
 
 	;; Function: heap_init
 heap_init:
@@ -13,8 +29,23 @@ heap_init:
 	mov esi, szMsgHeapInit
 	call klog
 
-	; TODO
+	mov eax, [ebp-4]
+	mov ecx, KERNEL_VIRT_BASE
+	mov [ecx + HeapNode.hole], dword 1
+	sub eax, sizeof.HeapNode + 4
+	mov [ecx + HeapNode.size], eax
 
+	add eax, sizeof.HeapNode
+	add eax, ecx
+	mov [eax], ecx
+
+	mov ecx, KERNEL_VIRT_BASE
+	mov [kheap + HeapInfo.start], ecx
+	mov eax, [ebp-4]
+	add ecx, eax
+	mov [kheap + HeapInfo.end], ecx
+
+.end:
 	leave
 	ret
 
@@ -24,4 +55,36 @@ heap_alloc:
 heap_free:
 	ret
 
+	;; Function: heap_getbin
+	;;
+	;; In:
+	;;   EAX - size
+heap_getbin:
+	push ebp
+	mov ebp, esp
+	sub esp, 4
+
+	mov [ebp-4], dword 0
+	cmp eax, 4
+	jge @f
+	mov eax, 4
+@@:
+	shr eax, 1
+	cmp eax, 1
+	or eax, eax
+	jz @f
+	inc dword [ebp-4]
+	jmp @b
+@@:
+	mov eax, [ebp-4]
+	sub eax, 2
+	cmp eax, 8
+	jbe @f
+	mov eax, 8
+@@:
+	leave
+	ret
+
+kheap HeapInfo
 szMsgHeapInit db "HEAP: initialize %x - %x", 0
+szMsgErrorHeap db "ERROR: HEAP: not enough memory", 0

kernel/kernel.asm

@@ -54,8 +54,8 @@ kmain:
 	add ebx, KERNEL_VIRT_BASE
 	call pmm_free_range
 
-	mov eax, [boot_structure.low_mem]
-	call heap_init
+	;mov eax, [boot_structure.low_mem]
+	;call heap_init
 
 	call pic_init
 
@@ -87,8 +87,6 @@ kmain:
 	;mov al, 'X'
 	;call cga_putc
 
-
-
 .halt:
 	hlt
 	jmp $
@@ -115,11 +113,12 @@ kmain:
 	include 'isr.inc'
 	include 'idt.inc'
 	include 'pic.inc'
-	include 'heap.inc'
+	;include 'heap.inc'
 	include 'vfs.inc'
 	include 'fs/fat.inc'
 	include 'fs/stpdfs.inc'
 	include 'fs/xv6fs.inc'
+	include 'proc.inc'
 
 
 szMsgKernelAlive db "Kernel (", VERSION_FULL , ") is alive", 0
@@ -129,6 +128,8 @@ boot_structure BootInfo
 
 kTSS TSS
 
+aProcs rb 64*sizeof.Process
+
 	align 4096
 stack_bottom:
 	rb 0x4000

kernel/proc.inc

@@ -0,0 +1,11 @@
+proc_init:
+	mov ecx, sizeof.Process * 64
+	xor ax, ax
+	mov edi, aProcs
+	rep stosb
+
+	ret
+
+
+uProcLock dd 0
+pCurrentProc dd 0

kernel/sys/process.inc

@@ -1,18 +1,21 @@
-
-struc ProcessGroup {
-}
-
 struc Context {
-	.flags dd ?
-	.regs  dd ?
+	.edi dd ?
+	.esi dd ?
+	.ebx dd ?
+	.ebp dd ?
+	.eip dd ?
 }
+DEFN Context
 
 struc Process {
-	.pagedir dd ?
-	.parent  dd ?
-	.context Context
-	.next    dd ?
+	.pagedir   dd ?
+	.kstack    dd ?
+	.parent    dd ?
+	.trapframe dd ?
+	.context   dd ?
+	.next      dd ?
 }
+DEFN Process
 
 PROCESS_STATE_IDL    = 0
 PROCESS_STATE_RUN    = 1