EMILE/second/enter_kernel040.S
2007-03-22 15:36:39 +00:00

63 lines
842 B
ArmAsm

/*
*
* (c) 2004-2007 Laurent Vivier <Laurent@lvivier.info>
*
*/
.cpu 68040
.include "copymem.i"
.align 4
.global enter_kernel040
enter_kernel040:
link.w %fp,#0
/* get physical start address of kernel */
move.l 8(%fp), %a0
/* size of image to relocate */
move.l 12(%fp), %d0
/* destination address */
move.l 16(%fp), %a2
/* bootenv address (EXPERIMENTAL) */
move.l %a2, %a1
add.l %d0, %a1
sub.l #4096, %a1
move.l #0x80000000, %d4
/* entry point */
move.l 20(%fp), %a3
/* disable MMU */
moveq.l #0, %d1
movec %d1, %tc
movec %d1, %itt0
movec %d1, %dtt0
movec %d1, %itt1
movec %d1, %dtt1
/* copy kernel to destination address */
copymem %a0, %a2, %d0
/* jump into kernel */
jmp %a3@
/* never comes here... I hope */
unlk %fp
rts
.global end_enter_kernel040
end_enter_kernel040: