feat(boot/loader): move kernel to 0x100000

boot/common/bootinfo.inc

@@ -10,7 +10,7 @@ struc BootInfoRange {
 	;;
 	;; StupidOS boot protocol structure
 struc BootInfo {
-	.mmap         dd 4*2*40 dup(0)
+	.mmap         dd 4*2*20 dup(0)
 	.kernel_start dd ?
 	.kernel_size  dd ?
 }

boot/common/const.inc

@@ -8,6 +8,7 @@ FALSE = 0
 MBR_BASE       = 0x0600
 BOOTSECT_BASE  = 0x7C00
 LOADER_BASE    = 0x1000
+KERNEL_BASE    = 0x100000
 MULTIBOOT_BASE = 0x100000
 DISK_BUFFER    = 0x8000
 KERNEL_PRELOAD = 0xF000

boot/loader/loader.asm

@@ -179,6 +179,12 @@ multiboot:
 common32:
 	mov [0xB8000], dword 0x07690748
 
+	; move kernel to 0x100000
+	mov ecx, [uKernelSize]
+	mov esi, KERNEL_PRELOAD
+	mov edi, KERNEL_BASE
+	rep movsb
+
 	; identity map first 1MB
 	xor esi, esi
 	xor ecx, ecx
@@ -196,7 +202,7 @@ common32:
 	mov dword [boot_page_directory], boot_0_page_table + 0x3 ; preset and writable
 
 	; map kernel at 0xC0000000
-	mov esi, KERNEL_PRELOAD
+	mov esi, KERNEL_BASE
 	mov edi, boot_768_page_table
 	xor ecx, ecx
 @@:
@@ -225,6 +231,8 @@ common32:
 	mov eax, STPDBOOT_MAGIC
 	mov ebx, boot_structure
 
+	xchg bx, bx
+
 	mov ecx, 0xC0000000
 	jmp ecx
 

boot/loader/memory.inc

@@ -56,10 +56,10 @@ memory_e820_get_map:
 	mov di, pE280AddrRange
 	mov ecx, 20
 	mov eax, 0xE820
-	mov edx, 0x534D4150
+	mov edx, 'PAMS'
 	int 0x15
 	jc .error
-	cmp eax, 0x534D4150
+	cmp eax, 'PAMS'
 	jne .error
 	or ebx, ebx
 	jz .end

kernel/Makefile

@@ -7,7 +7,8 @@ SRCS	= kernel.asm \
 			const.inc \
 			klog.inc \
 			dev/vga_console.inc \
-			mm/mm.inc
+			mm/mm.inc \
+			mm/pmm.inc
 
 .PHONY: all
 all: $(KERNEL)

kernel/bootinfo.inc

@@ -0,0 +1,16 @@
+	;; File: bootinfo.inc
+
+	;; Struct: BootInfoRange
+struc BootInfoRange {
+	.base dd ?
+	.length dd ?
+}
+
+	;; Struct: BootInfo
+	;;
+	;; StupidOS boot protocol structure
+struc BootInfo {
+	.mmap         dd 4*2*20 dup(0)
+	.kernel_start dd ?
+	.kernel_size  dd ?
+}

kernel/intro.txt

@@ -3,7 +3,7 @@ File: Introduction
 About: kernel memory map
 
 >
-> Physical map 
+> Physical map                            virtual map
 >            +---------------+
 >            |               |
 >            +---------------+

kernel/kernel.asm

@@ -19,16 +19,17 @@ db 32 dup(0)
 	;;     EBX - Boot structure address
 	;;
 kmain:
+	xchg bx, bx
+
 	mov esp, stack_top
 	
 	cmp eax, STPDBOOT_MAGIC
-	jne .halt
+	jne .error_magic
 
 	; init memory manager
 	; init idt, gdt
 	; copy boot structure 
-	xchg bx, bx
-	call vga_console_clear
+	;call vga_console_clear
 
 	mov [0xC03B0000], dword 0x08740953
 	mov [0xC03B0004], dword 0x05700675
@@ -44,12 +45,18 @@ kmain:
 .halt:
 	hlt
 	jmp $
+.error_magic:
+	mov esi, szErrorBootProtocol
+.error:
+	call klog
+	jmp .halt
 
 	include 'klog.inc'
 	include 'dev/vga_console.inc'
 	include 'mm/mm.inc'
 
 szMsgKernelAlive db "Kernel is alive", 0
+szErrorBootProtocol db "Error: wrong magic number", 0
 
 	align 4
 stack_bottom:

kernel/mm/mm.inc

@@ -1,4 +1,5 @@
-free_block_head dd 0x0
+
+include "pmm.inc"
 
 mm_init:
 	ret

kernel/mm/pmm.inc

@@ -1,3 +1,16 @@
-struc
-{
-}
+
+	align 4
+;aPhysPageBitmap:
+;	dd 32769 dup(0)
+
+pmm_init:
+	ret
+
+pmm_alloc_page:
+	ret
+
+pmm_free_range:
+	ret
+
+pmm_free_page:
+	ret