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#define ASM_FILE 1
#ifdef TARGET_MULTIBOOT2
#include <multiboot2.h>
#elif defined (TARGET_MULTIBOOT)
#include <multiboot.h>
#endif
#define SHUTDOWN_PORT 0x8900
.text
/* Align 32 bits boundary. */
.align 8
#ifdef TARGET_MULTIBOOT2
/* Multiboot header. */
multiboot_header:
/* magic */
.long MULTIBOOT2_HEADER_MAGIC
/* ISA: i386 */
.long MULTIBOOT_ARCHITECTURE_I386
/* Header length. */
.long multiboot_header_end - multiboot_header
/* checksum */
.long -(MULTIBOOT2_HEADER_MAGIC + MULTIBOOT_ARCHITECTURE_I386 + (multiboot_header_end - multiboot_header))
.short MULTIBOOT_HEADER_TAG_END
.short 0
.long 8
multiboot_header_end:
#elif defined (TARGET_MULTIBOOT)
/* Multiboot header. */
multiboot_header:
/* magic */
.long MULTIBOOT_HEADER_MAGIC
/* flags */
.long 0
/* checksum */
.long -MULTIBOOT_HEADER_MAGIC
#endif
.global start
portmsg:
xorl %eax, %eax
1:
movb 0(%esi), %al
test %eax, %eax
jz 1f
outb %al, %dx
incl %esi
jmp 1b
1:
ret
serialmsg:
1:
movb 0(%esi), %bl
testb %bl, %bl
jz 1f
movw $0x3fd, %dx
2:
inb %dx, %al
testb $0x20, %al
jz 2b
movw $0x3f8, %dx
movb %bl, %al
outb %al, %dx
incl %esi
jmp 1b
1:
ret
.globl _start
_start:
lea message, %esi
call serialmsg
lea shutdown, %esi
movw $SHUTDOWN_PORT, %dx
call portmsg
1:
hlt
jmp 1b
shutdown:
.ascii "Shutdown"
.byte 0
message:
.ascii "Boot Test Passed Successfully\n" SUCCESSFUL_BOOT_STRING "\n"
.byte 0
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