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use swith_to_PPC and a bootstrap to boot kernel PPC

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This commit is contained in:
Laurent Vivier 2007-02-17 22:38:18 +00:00
parent 26118c7f51
commit e2777d45e2
2 changed files with 0 additions and 113 deletions
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88
second/enter_kernelPPC.S
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/*
*
* (c) 2005 Laurent Vivier <Laurent@lvivier.info>
* from BootX, (c) Benjamin Herrenschmidt
*
*/
.chip 68020
.equ PC, 0x00FC
.equ GPR, 0x0100
.equ FPR, 0x0200
#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
.global enter_kernelPPC
enter_kernelPPC:
link.w %fp,#0
/* get physical start address of kernel */
move.l 8(%fp), %a0
/* get PPC registers values */
move.l 12(%fp), %a1
/* prepare stack */
move.l %sp, %d0
andi.l #0xFFFFFC00, %d0
move.l %d0, %sp
move.l #0x00BF, %d0
loop:
clr.l -(%sp)
dbra %d0, loop
/* Initialize PPC registers */
/* set up program counter */
/* PC */
move.l %a1@+, pc
/* GPR */
copy_GPR
/* FPR */
copy_FPR
/* 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
unlk %fp
rts

25
second/enter_kernelPPC.h
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/*
*
* (c) 2005 Laurent Vivier <Laurent@lvivier.info>
*
* Some parts from bootX, (c) BenH
*
*/
#ifndef __ENTER_KERNELPPC_H__
#define __ENTER_KERNELPPC_H__
#include "misc.h"
typedef u_int32_t float_reg_t[2];
typedef struct PPCRegisterList
{
u_int32_t PC;
u_int32_t GPR[32];
float_reg_t FPR[32];
} PPCRegisterList;
extern void enter_kernelPPC(unsigned long addr, PPCRegisterList* regs);
#endif