feat(kernel): detect floppy

kernel/Makefile

@@ -6,7 +6,6 @@ KERNEL	= vmstupid.sys
 SRCS	= kernel.asm \
 			const.inc \
 			klog.inc \
-			dev/vga_console.inc \
 			mm/mm.inc \
 			mm/pmm.inc \
 			lock.inc \
@@ -14,9 +13,11 @@ SRCS	= kernel.asm \
 			isr.inc \
 			pic.inc \
 			idt.inc \
+			dev/console.inc \
 			dev/at/pit.inc \
 			dev/at/cga.inc \
-			dev/at/kbd.inc
+			dev/at/kbd.inc \
+			dev/at/floppy.inc
 
 .PHONY: all
 all: $(KERNEL)

kernel/dev/at/cmos.inc

@@ -0,0 +1,15 @@
+	;; File: cmos.inc 
+	;;
+	;; > +--------------------------------
+	;; > | 0x00 | RTC seconds
+	;; > +---------------
+	;; > | 0x01 | RTC seconds alarm
+	;; > +--------------------
+	;; > | 0x02 | RTC minutes
+	;; > +------------------------
+
+
+CMOS_COMMAND = 0x70
+CMOS_DATA    = 0x71
+
+CMOS_FLOPPY_TYPE = 0x10

kernel/dev/at/com.inc

@@ -0,0 +1,4 @@
+	;; File: com.inc
+
+com_probe:
+	ret

kernel/dev/at/floppy.inc

@@ -0,0 +1,35 @@
+	;; File: floppy.inc
+
+CMOS_FLOPPY_TYPE = 0x10
+
+FLOPPY_NONE   = 0x0
+FLOPPY_360KB  = 0x1
+FLOPPY_1_2MB  = 0x2
+FLOPPY_720KB  = 0x3
+FLOPPY_1_44MB = 0x4
+FLOPPY_2_88MB = 0x5
+
+floppy_probe:
+	mov al, CMOS_FLOPPY_TYPE
+	out CMOS_COMMAND, al
+	in al, CMOS_DATA
+	mov ah, al
+	and al, 0x0F
+	and ah, 0xF0
+	or al, al
+	jz @f
+	push ax
+	mov esi, szMsgFloppy1Found
+	call klog
+	pop ax
+@@:
+	or ah, ah
+	jz @f
+	mov esi, szMsgFloppy0Found
+	call klog
+@@:
+	ret
+
+
+szMsgFloppy0Found db "floppy0: Found", 0
+szMsgFloppy1Found db "floppy1: Found", 0

kernel/dev/at/ide.inc

@@ -0,0 +1,4 @@
+	;; File: ide.inc
+
+ide_probe:
+	ret

kernel/dev/at/ne2k.inc

@@ -0,0 +1,9 @@
+	;; File: ne2k.inc
+	;; 
+	;; Usefull links:
+	;; - <datasheet at https://bitsavers.org/components/national/_dataBooks/1988_National_Data_Communications_Local_Area_Networks_UARTs_Handbook.pdf>
+
+NE2K_IOBASE = 0x300
+
+ne2k_probe:
+	ret

kernel/dev/console.inc

@@ -1,2 +1,21 @@
 	;; File: console.inc
+console_probe:
+	ret
 
+console_write:
+	mov eax, uConsoleLock
+	call lock_acquire
+
+	mov eax, uConsoleLock
+	call lock_release
+	ret
+
+console_read:
+	mov eax, uConsoleLock
+	call lock_acquire
+
+	mov eax, uConsoleLock
+	call lock_release
+	ret
+
+uConsoleLock dd 0

kernel/dev/dev.inc

@@ -1,9 +1,8 @@
 	;; File: dev.inc
 
-
-
 struc Device {
 	.write dd ?
 	.read  dd ?
+	.probe dd ?
 }
 

kernel/dev/vga_console.inc

@@ -1,25 +0,0 @@
-	;; File: vga_console.inc
-
-VGA_COLUMNS = 80
-VGA_LINES = 25
-VGA_BASE = 0xC00B8000
-
-vga_lineno db 0
-vga_colno db 0
-
-
-	;; Function: vga_console_clear
-vga_console_clear:
-	mov ecx, VGA_COLUMNS*VGA_LINES
-	xor al, al
-	mov edi, VGA_BASE
-	rep stosb
-	ret
-
-	;; Function: vga_console_putc
-	;;
-	;; In:
-	;;    AL - charactere to print
-vga_console_putc:
-
-	ret

kernel/kernel.asm

@@ -70,6 +70,8 @@ kmain:
 	mov al, 'X'
 	call cga_putc
 
+	call floppy_probe
+
 .halt:
 	hlt
 	jmp $
@@ -80,7 +82,7 @@ kmain:
 	jmp .halt
 
 	include 'klog.inc'
-	include 'dev/vga_console.inc'
+	include 'dev/console.inc'
 	include 'mm/mm.inc'
 	include 'lock.inc'
 	include 'gdt.inc'
@@ -91,6 +93,7 @@ kmain:
 	include 'dev/at/pit.inc'
 	include 'dev/at/kbd.inc'
 	include 'dev/at/cga.inc'
+	include 'dev/at/floppy.inc'
 
 
 szMsgKernelAlive db "Kernel (", VERSION_FULL , ") is alive", 0

kernel/klog.inc

@@ -1,7 +1,7 @@
 	;; File: klog.inc
 	;; Kernel logging utilities
 
-CMOS_ADDRESS = 0x70
+CMOS_COMMAND = 0x70
 CMOS_DATA    = 0x71
 
 CMOS_REG_SECOND = 0x00
@@ -44,13 +44,13 @@ klog_print:
 klog_print_time:
 @@:
 	mov al, 0x0A
-	out CMOS_ADDRESS, al
+	out CMOS_COMMAND, al
 	in al, CMOS_DATA
 	and al, 0x80
 	jnz @b
 
 	mov al, CMOS_REG_HOUR
-	out CMOS_ADDRESS, al
+	out CMOS_COMMAND, al
 	in al, CMOS_DATA
 
 	mov ah, al
@@ -64,7 +64,7 @@ klog_print_time:
 	mov [szTime + 2], al
 
 	mov al, CMOS_REG_MINUTE
-	out CMOS_ADDRESS, al
+	out CMOS_COMMAND, al
 	in al, CMOS_DATA
 
 	mov ah, al
@@ -78,7 +78,7 @@ klog_print_time:
 	mov [szTime + 5], al
 
 	mov al, CMOS_REG_SECOND
-	out CMOS_ADDRESS, al
+	out CMOS_COMMAND, al
 	in al, CMOS_DATA
 
 	mov ah, al

kernel/vfs.inc

@@ -1,3 +1,77 @@
+	;; File: vfs.inc
+	;;
+	;; Usefull links:
+	;; - <https://www.cs.fsu.edu/~awang/courses/cop5611_s2024/vnode.pdf>
+	;;
+
+struc VFS {
+	.next   dd ?
+	.op     dd ?
+	.vnodes dd ?
+	.flag   dd ?
+	.bsize  dd ?
+	.data   dd ?
+}
+
+struc VFSOps {
+	.mount  dd ?
+	.umount dd ?
+	.root   dd ?
+	.statfs dd ?
+	.sync   dd ?
+	.fid    dd ?
+	.vget   dd ?
+}
+
+VNODE_TYPE_NON  = 0x0
+VNODE_TYPE_REG  = 0x1
+VNODE_TYPE_DIR  = 0x2
+VNODE_TYPE_BLK  = 0x3
+VNODE_TYPE_CHR  = 0x4
+VNODE_TYPE_LNK  = 0x5
+VNODE_TYPE_SOCK = 0x6
+VNODE_TYPE_BAD  = 0x7
+
+struc VNode {
+	.flag     dw ?
+	.refcount dw ?
+	.shlockc  dw ?
+	.exlockc  dw ?
+	.vfs      dd ?
+	.op       dd ?
+	.sock     dd ?
+	.vfsp     dd ?
+	.type     db ?
+	.data     dd ?
+}
+
+struc VNodeOps {
+	.open     dd ?
+	.close    dd ?
+	.rdwr     dd ?
+	.ioctl    dd ?
+	.select   dd ?
+	.getattr  dd ?
+	.setattr  dd ?
+	.access   dd ?
+	.lookup   dd ?
+	.create   dd ?
+	.remove   dd ?
+	.link     dd ?
+	.rename   dd ?
+	.mkdir    dd ?
+	.rmdir    dd ?
+	.readdir  dd ?
+	.symlink  dd ?
+	.readlink dd ?
+	.fsync    dd ?
+	.inactive dd ?
+	.bmap     dd ?
+	.strategy dd ?
+	.bread    dd ?
+	.brelse   dd ?
+}
+
 vfs_init:
 	ret