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Add processor switch to PPC

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This commit is contained in:
Laurent Vivier 2005-05-12 05:47:26 +00:00
parent 7ae18b52cf
commit 1e2b50db64
1 changed files with 30 additions and 4 deletions
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34
second/enter_kernelPPC.S
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@ -1,6 +1,7 @@
/*
*
* (c) 2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
* from BootX, (c) Benjamin Herrenschmidt
*
*/
@ -8,6 +9,10 @@
.include "copymem.i"
.equ PC, 0x00FC
.equ GPR, 0x0100
.equ FPR, 0x0200
.align 4
.global enter_kernelPPC
@ -32,13 +37,34 @@ enter_kernelPPC:
copymem %a0, %a2, %d0
/* jump into kernel */
/* prepare stack */
jmp %a1@
move.l %sp, %d0
andi.l #0xFFFFFC00, %d0
move.l %d0, %sp
move.l #0x00BF, %d0
loop:
clr.l -(%sp)
dbra %d0, loop
/* never comes here... I hope */
/* Initialize PPC registers */
unlk %fp
/* set up program counter */
move.l %a1, PC(%sp)
/* Switch to PPC */
move.l #0x47617279, %a0 /* 'Gary' */
move.l #0x05051956, %a1
move.l #0x0000C000, %d0
moveq #0, %d2
reset
move.l %sp,-(%sp)
wait:
dc.w 0xFE03
beq wait
rts
.global end_enter_kernelPPC
end_enter_kernelPPC: