clean-up

Makefile

@@ -90,15 +90,19 @@ make_disk:
 
 testloader: loader
 	@qemu-system-x86_64 -hda build/bin/disk.img -d cpu_reset,guest_errors,pcall,int -enable-kvm 2> qemu.log &
-	@ndisasm $(OBJDIR)/boot/loader -b 32 > loader_dism.asm
+	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 64 > loader_disasm64.asm
+	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 32 > loader_disasm32.asm
 
-testloader32: loader
+
+testloader: loader
 	@qemu-system-i386 -hda build/bin/disk.img -d cpu_reset,guest_errors,pcall,int -enable-kvm 2> qemu.log &
-	@ndisasm $(OBJDIR)/boot/loader -b 32 > loader_dism.asm
+	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 64 > loader_disasm64.asm
+	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 32 > loader_disasm32.asm
 
-debugloader: loader
+testloader: loader
 	@qemu-system-x86_64 -hda build/bin/disk.img -d cpu_reset,guest_errors,pcall,int -s -S -enable-kvm 2> qemu.log &
-	@ndisasm $(OBJDIR)/boot/loader -b 32 > loader_dism.asm
+	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 64 > loader_disasm64.asm
+	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 32 > loader_disasm32.asm
 
 boot: make_disk boot.mbr loader
 	@echo ${CL2}[[boot]]${CL} Terminated without error.${CL3}
@@ -111,6 +115,5 @@ link:
 	@x86_64-elf-objcopy -I elf64-x86-64 -O elf32-i386 $(OBJDIR)/boot/kaleid.x86_64 $(BINDIR)/kaleid
 
 clean:
-	rm -Rf $(BINDIR)/*
+	@rm -Rf $(BINDIR)/*
-	rm -Rf $(OBJDIR)/*/*/*/*.o
+	@rm -Rf $(OBJDIR)/*/*/*/*.o
-

boot/folder.desc

@@ -23,17 +23,19 @@
 #=----------------------------------------------------------------------------=#
 
 
-This folder contains the source for OS/K's bootloader.
+This folder contains the source for OS/K's early loader.
 OS/K being intended to only run on x86-64 systems, we have not divided
 this folder into one sub-folder per architecture.
 
-The bootloader itself is external to the OS/K project. We are using GRUB 2 to load
+The bootloader itself is external to the OS/K project. We are using GRUB 2 to
-our kernel loader in memory.
+ load our kernel loader in memory.
 
 The kernel loader, that we call the loader, is the main subject of this folder.
-This loader is intended to load the ELF64 kernel at the specified address and
+This loader is linked whith the kernel and loaded by Grub at the specified
-prepare it for the hard work it have to do :
+address and prepare it for the hard work it have to do :
 
-    - Parsing the ELF64
+    - Check the multiboot state
-    - Load the kernel
+    - Check if CPUID and long mode is supported
-    - Prepare a structure for it with memory map, cpu infos, and other devices infos.
+    - Send a structure for it with memory map, cpu infos, and other devices
+infos, prepared by GRUB.
+    - Switch into long mode

boot/loader/loader.asm

@@ -52,10 +52,10 @@ MB_start:
     popf
     push eax                            ; 2nd argument is magic number
     push ebx                            ; 1st argument multiboot info pointer
-    mov ecx, eax
+    mov ecx, eax                        ; For debug
     call _loader
     add esp, 8                          ; Cleanup arguments "A la MIPS"
-    jmp Die                             ; Aufwiedersehen
+    jmp Die                             ; Aufwiedersehen, but never used
 
 ;; THE HOLES ---------------------------------------------------------------- ;;
 ; ---------------------------------------------------------------------------- ;
@@ -98,16 +98,20 @@ _loader:
 LOGO: db 219, 219, 219, " OS/K", 0
 
 lbegin:
-    call MB_check
+    call clear                          ; Clear the screen
 
-    call Check_cpuid
+    ;; BEGIN OF CHECKLIST
-    call Is64Bits
+    call MB_check                       ; Check Multiboot State
-    call CheckA20
 
-    call Setup_paging
+    call Check_cpuid                    ; Check if cpuid supported
-    call Go64
+    call Is64Bits                       ; Check if long mode available
+    call CheckA20                       ; Check if A20 is correctly enable
 
-    push esi
+    ;; BEGIN OF WORK
+    call Setup_paging                   ; Enable paging
+    call Go64                           ; Prepare switch into long mode
+
+    push esi                            ; Print the logo
     mov bl, 0x0E
     mov esi, LOGO
     call write32
@@ -116,12 +120,11 @@ lbegin:
     call disable_cursor
 
     lgdt [GDT64.pointer]
-    jmp GDT64.code:_loader64
+    jmp GDT64.code:_loader64            ; SWITCH
 
 [BITS 64]
 
-
+x64_K           db "Now in x64 long mode", 0x0A, 0x0D, 0x0
-Salut           db "Now in x64 long mode", 0x0A, 0x0D, 0x0
 GoKernel        db "Launching Kernel...", 0
 
 _loader64:
@@ -135,23 +138,21 @@ _loader64:
 
     call bitemporize
 
-    mov qword [NextTRAM], TRAM+80*4
+    mov qword [NextTRAM], TRAM+80*4     ; Because we don't want to overwrite
 
     ;; Hello world
     mov bl, 0x0A
-    mov esi, Salut
+    mov esi, x64_K
     call write
-
-    ;; Read ATA
     mov bl, 0x0F
     mov esi, GoKernel
     call write
 
-    ;mov ecx, 4000
+    ;; Launch the kernel !
-    call tritemporize
+    call tritemporize                   ; Let time to see
 
     extern StartKern
     jmp StartKern
 
-
+;; We must never reach this point ------------------------------------------- ;;
     jmp Die

kaleid/kernel/init/init.c

@@ -28,7 +28,7 @@
 //
 // Entry point of the Kaleid kernel
 //
-noreturn void StartKern(void)
+noreturn void StartKern(void* multibooot_info, int multiboot_magic)
 {
     // We're not ready to deal with interrupts
     DisableIRQs();