Macintosh-SW/EMILE
1
0
Fork 0
mirror of https://github.com/vivier/EMILE.git synced 2024-08-01 15:28:59 +00:00
Code Issues Projects Releases Wiki Activity

remove kernel relocation, add PPC registers copy

Browse Source
This commit is contained in:
Laurent Vivier 2005-05-13 17:24:34 +00:00
parent 85f489de67
commit 878e238e66
1 changed files with 32 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
second/enter_kernelPPC.S
View File

@ -7,15 +7,29 @@
.chip 68020
.include "copymem.i"
.equ PC, 0x00FC
.equ GPR, 0x0100
.equ FPR, 0x0200
#define pc PC(%sp)
#define gpr(a) GPR + 8 * a(%sp)
#define fpr(a) FPR + 8 * a(%sp)
#define pc %sp@(PC)
#define gpr(a) %sp@(GPR + 8 * a + 4)
#define fpr0(a) %sp@(FPR + 8 * a)
#define fpr1(a) %sp@(FPR + 8 * a + 4)
.macro copy_GPR from=0, to=31
move.l %a1@+, gpr(\from)
.if \to-\from
copy_GPR "(\from+1)",\to
.endif
.endm
.macro copy_FPR from=0, to=31
move.l %a1@+, fpr0(\from)
move.l %a1@+, fpr1(\from)
.if \to-\from
copy_FPR "(\from+1)",\to
.endif
.endm
.align 4
@ -27,19 +41,9 @@ enter_kernelPPC:
move.l 8(%fp), %a0
/* size of image to relocate */
/* get PPC registers values */
move.l 12(%fp), %d0
/* destination addresse */
move.l 16(%fp), %a2
/* copy kernel to destination address */
move.l %a2, %a1
copymem %a0, %a2, %d0
move.l 12(%fp), %a1
/* prepare stack */
@ -53,13 +57,19 @@ loop:
/* Initialize PPC registers */
move.l #0x426f6f58, gpr(3) /* 'BooX' */
move.l #bootx_infos, gpr(4)
move.l #0, gpr(5)
/* set up program counter */
move.l %a1, pc
/* PC */
move.l %a1@+, pc
/* GPR */
copy_GPR
/* FPR */
copy_FPR
/* Switch to PPC */
@ -74,5 +84,3 @@ wait:
dc.w 0xFE03
beq wait
rts
.global end_enter_kernelPPC
end_enter_kernelPPC: