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https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
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320 lines
6.3 KiB
C
320 lines
6.3 KiB
C
/* $NetBSD: bootxx.c,v 1.18 2009/03/14 21:04:12 dsl Exp $ */
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/*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <powerpc/oea/bat.h>
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#include <sys/bootblock.h>
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int (*openfirmware)(void *);
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/*
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* 32 KB of stack with 32 bytes overpad
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* (see below)
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*/
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int32_t __attribute__((aligned(16))) stack[8192 + 8];
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struct shared_bbinfo bbinfo = {
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{ MACPPC_BBINFO_MAGIC },
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0,
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SHARED_BBINFO_MAXBLOCKS,
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{ 0 }
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};
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#ifndef DEFAULT_ENTRY_POINT
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#define DEFAULT_ENTRY_POINT 0xE00000
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#endif
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void (*entry_point)(int, int, void *) = (void *)DEFAULT_ENTRY_POINT;
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__asm(
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" .text \n"
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" .align 2 \n"
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" .globl _start \n"
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"_start: \n"
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" lis %r8,(_start)@ha \n"
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" addi %r8,8,(_start)@l\n"
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" li %r9,0x40 \n" /* loop 64 times (for 2048 bytes of bootxx) */
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" mtctr %r9 \n"
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"1: \n"
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" dcbf %r0,%r8 \n"
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" icbi %r0,%r8 \n"
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" addi %r8,%r8,0x20 \n"
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" bdnz 1b \n"
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" sync \n"
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" li %r0,0 \n"
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" mtdbatu 3,%r0 \n"
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" mtibatu 3,%r0 \n"
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" isync \n"
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" li %r8,0x1ffe \n" /* map the lowest 256MB */
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" li %r9,0x22 \n" /* BAT_I */
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" mtdbatl 3,%r9 \n"
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" mtdbatu 3,%r8 \n"
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" mtibatl 3,%r9 \n"
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" mtibatu 3,%r8 \n"
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" isync \n"
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/*
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* setup 32 KB of stack with 32 bytes overpad (see above)
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*/
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" lis %r1,(stack+32768)@ha\n"
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" addi %r1,%r1,(stack+32768)@l\n"
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" stw %r0,0(%r1) \n" /* terminate the frame link chain */
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" b startup \n"
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);
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static inline int
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OF_finddevice(char *name)
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{
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static struct {
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char *name;
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int nargs;
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int nreturns;
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char *device;
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int phandle;
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} args = {
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"finddevice",
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1,
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1,
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};
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args.device = name;
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openfirmware(&args);
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return args.phandle;
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}
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static inline int
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OF_getprop(int handle, char *prop, void *buf, int buflen)
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{
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static struct {
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char *name;
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int nargs;
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int nreturns;
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int phandle;
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char *prop;
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void *buf;
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int buflen;
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int size;
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} args = {
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"getprop",
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4,
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1,
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};
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args.phandle = handle;
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args.prop = prop;
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args.buf = buf;
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args.buflen = buflen;
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openfirmware(&args);
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return args.size;
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}
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static inline int
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OF_open(char *dname)
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{
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static struct {
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char *name;
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int nargs;
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int nreturns;
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char *dname;
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int handle;
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} args = {
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"open",
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1,
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1,
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};
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args.dname = dname;
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openfirmware(&args);
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return args.handle;
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}
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static inline int
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OF_read(int handle, void *addr, int len)
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{
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static struct {
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char *name;
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int nargs;
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int nreturns;
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int ihandle;
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void *addr;
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int len;
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int actual;
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} args = {
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"read",
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3,
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1,
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};
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args.ihandle = handle;
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args.addr = addr;
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args.len = len;
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openfirmware(&args);
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return args.actual;
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}
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static inline int
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OF_seek(int handle, u_quad_t pos)
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{
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static struct {
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char *name;
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int nargs;
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int nreturns;
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int handle;
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int poshi;
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int poslo;
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int status;
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} args = {
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"seek",
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3,
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1,
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};
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args.handle = handle;
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args.poshi = (int)(pos >> 32);
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args.poslo = (int)pos;
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openfirmware(&args);
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return args.status;
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}
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static inline int
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OF_write(int handle, const void *addr, int len)
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{
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static struct {
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char *name;
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int nargs;
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int nreturns;
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int ihandle;
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const void *addr;
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int len;
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int actual;
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} args = {
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"write",
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3,
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1,
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};
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args.ihandle = handle;
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args.addr = addr;
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args.len = len;
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openfirmware(&args);
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return args.actual;
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}
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int stdout;
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void
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putstrn(const char *s, size_t n)
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{
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OF_write(stdout, s, n);
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}
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#define putstr(x) putstrn((x),sizeof(x)-1)
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#define putc(x) do { char __x = (x) ; putstrn(&__x, 1); } while (0)
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void
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startup(int arg1, int arg2, void *openfirm)
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{
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int fd, blk, chosen, options, j;
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size_t i;
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char *addr;
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char bootpath[128];
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openfirmware = openfirm;
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chosen = OF_finddevice("/chosen");
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if (OF_getprop(chosen, "bootpath", bootpath, sizeof(bootpath)) == 1) {
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/*
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* buggy firmware doesn't set bootpath...
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*/
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options = OF_finddevice("/options");
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OF_getprop(options, "boot-device", bootpath, sizeof(bootpath));
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}
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if (OF_getprop(chosen, "stdout", &stdout, sizeof(stdout))
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!= sizeof(stdout))
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stdout = -1;
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/*
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* "scsi/sd@0:0" --> "scsi/sd@0"
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*/
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for (i = 0; i < sizeof(bootpath); i++) {
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if (bootpath[i] == ':')
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bootpath[i] = 0;
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if (bootpath[i] == 0)
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break;
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}
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putstr("\r\nOF_open bootpath=");
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putstrn(bootpath, i);
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fd = OF_open(bootpath);
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addr = (char *)entry_point;
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putstr("\r\nread stage 2 blocks: ");
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for (j = 0; j < bbinfo.bbi_block_count; j++) {
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if ((blk = bbinfo.bbi_block_table[j]) == 0)
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break;
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putc('0' + j % 10);
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OF_seek(fd, (u_quad_t)blk * 512);
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OF_read(fd, addr, bbinfo.bbi_block_size);
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addr += bbinfo.bbi_block_size;
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}
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putstr(". done!\r\nstarting stage 2...\r\n");
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/*
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* enable D/I cache
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*/
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__asm(
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"mtdbatu 3,%0\n\t"
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"mtdbatl 3,%1\n\t"
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"mtibatu 3,%0\n\t"
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"mtibatl 3,%1\n\t"
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"isync"
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:: "r"(BATU(0, BAT_BL_256M, BAT_Vs)),
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"r"(BATL(0, 0, BAT_PP_RW)));
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entry_point(0, 0, openfirm);
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for (;;); /* just in case */
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}
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