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remove kernel relocation, add PPC registers copy

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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
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56
second/enter_kernelPPC.S
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@ -7,15 +7,29 @@
.chip 68020 .chip 68020
.include "copymem.i"
.equ PC, 0x00FC .equ PC, 0x00FC
.equ GPR, 0x0100 .equ GPR, 0x0100
.equ FPR, 0x0200 .equ FPR, 0x0200
#define pc PC(%sp) #define pc %sp@(PC)
#define gpr(a) GPR + 8 * a(%sp) #define gpr(a) %sp@(GPR + 8 * a + 4)
#define fpr(a) FPR + 8 * a(%sp) #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 .align 4
@ -27,19 +41,9 @@ enter_kernelPPC:
move.l 8(%fp), %a0 move.l 8(%fp), %a0
/* size of image to relocate */ /* get PPC registers values */
move.l 12(%fp), %d0 move.l 12(%fp), %a1
/* destination addresse */
move.l 16(%fp), %a2
/* copy kernel to destination address */
move.l %a2, %a1
copymem %a0, %a2, %d0
/* prepare stack */ /* prepare stack */
@ -53,13 +57,19 @@ loop:
/* Initialize PPC registers */ /* Initialize PPC registers */
move.l #0x426f6f58, gpr(3) /* 'BooX' */
move.l #bootx_infos, gpr(4)
move.l #0, gpr(5)
/* set up program counter */ /* set up program counter */
move.l %a1, pc /* PC */
move.l %a1@+, pc
/* GPR */
copy_GPR
/* FPR */
copy_FPR
/* Switch to PPC */ /* Switch to PPC */
@ -74,5 +84,3 @@ wait:
dc.w 0xFE03 dc.w 0xFE03
beq wait beq wait
rts rts
.global end_enter_kernelPPC
end_enter_kernelPPC: