NetBSD-5.0.2/sys/arch/macppc/stand/ofwboot/Locore.c
/* $NetBSD: Locore.c,v 1.23 2006/09/18 10:19:00 sanjayl Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <lib/libsa/stand.h>
#include <machine/cpu.h>
#include <machine/stdarg.h>
#include "openfirm.h"
static int (*openfirmware)(void *);
static void startup(void *, int, int (*)(void *), char *, int)
__attribute__((__used__));
static void setup(void);
static int stack[8192/4 + 4] __attribute__((__used__));
#ifdef XCOFF_GLUE
__asm(
" .text \n"
" .globl _entry \n"
"_entry: \n"
" .long _start,0,0 \n"
);
#endif /* XCOFF_GLUE */
__asm(
" .text \n"
" .globl _start \n"
"_start: \n"
" sync \n"
" isync \n"
" lis %r1,stack@ha \n"
" addi %r1,%r1,stack@l \n"
" addi %r1,%r1,8192 \n"
" \n"
" mfmsr %r8 \n"
" li %r0,0 \n"
" mtmsr %r0 \n"
" isync \n"
" \n"
" mtibatu 0,%r0 \n"
" mtibatu 1,%r0 \n"
" mtibatu 2,%r0 \n"
" mtibatu 3,%r0 \n"
" mtdbatu 0,%r0 \n"
" mtdbatu 1,%r0 \n"
" mtdbatu 2,%r0 \n"
" mtdbatu 3,%r0 \n"
" \n"
" li %r9,0x12 \n" /* BATL(0, BAT_M, BAT_PP_RW) */
" mtibatl 0,%r9 \n"
" mtdbatl 0,%r9 \n"
" li %r9,0x1ffe \n" /* BATU(0, BAT_BL_256M, BAT_Vs) */
" mtibatu 0,%r9 \n"
" mtdbatu 0,%r9 \n"
" isync \n"
" \n"
" mtmsr %r8 \n"
" isync \n"
" \n"
/*
* Make sure that .bss is zeroed
*/
" \n"
" li %r0,0 \n"
" lis %r8,_edata@ha \n"
" addi %r8,%r8,_edata@l\n"
" lis %r9,_end@ha \n"
" addi %r9,%r9,_end@l \n"
" \n"
"5: cmpw 0,%r8,%r9 \n"
" bge 6f \n"
" stw %r0,0(%r8) \n"
" addi %r8,%r8,4 \n"
" b 5b \n"
" \n"
"6: b startup \n"
);
#if 0
static int
openfirmware(void *arg)
{
__asm volatile ("sync; isync");
openfirmware_entry(arg);
__asm volatile ("sync; isync");
}
#endif
static void
startup(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl)
{
openfirmware = openfirm;
setup();
main();
OF_exit();
}
__dead void
OF_exit(void)
{
static struct {
const char *name;
int nargs;
int nreturns;
} args = {
"exit",
0,
0
};
openfirmware(&args);
for (;;); /* just in case */
}
int
OF_finddevice(const char *name)
{
static struct {
const char *name;
int nargs;
int nreturns;
const char *device;
int phandle;
} args = {
"finddevice",
1,
1,
};
args.device = name;
if (openfirmware(&args) == -1)
return -1;
return args.phandle;
}
int
OF_instance_to_package(int ihandle)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ihandle;
int phandle;
} args = {
"instance-to-package",
1,
1,
};
args.ihandle = ihandle;
if (openfirmware(&args) == -1)
return -1;
return args.phandle;
}
int
OF_getprop(int handle, const char *prop, void *buf, int buflen)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
const char *prop;
void *buf;
int buflen;
int size;
} args = {
"getprop",
4,
1,
};
args.phandle = handle;
args.prop = prop;
args.buf = buf;
args.buflen = buflen;
if (openfirmware(&args) == -1)
return -1;
return args.size;
}
#ifdef __notyet__ /* Has a bug on FirePower */
int
OF_setprop(int handle, const char *prop, void *buf, int len)
{
static struct {
const char *name;
int nargs;
int nreturns;
int phandle;
const char *prop;
void *buf;
int len;
int size;
} args = {
"setprop",
4,
1,
};
args.phandle = handle;
args.prop = prop;
args.buf = buf;
args.len = len;
if (openfirmware(&args) == -1)
return -1;
return args.size;
}
#endif
int
OF_open(const char *dname)
{
static struct {
const char *name;
int nargs;
int nreturns;
const char *dname;
int handle;
} args = {
"open",
1,
1,
};
#ifdef OFW_DEBUG
printf("OF_open(%s) -> ", dname);
#endif
args.dname = dname;
if (openfirmware(&args) == -1 ||
args.handle == 0) {
#ifdef OFW_DEBUG
printf("lose\n");
#endif
return -1;
}
#ifdef OFW_DEBUG
printf("%d\n", args.handle);
#endif
return args.handle;
}
void
OF_close(int handle)
{
static struct {
const char *name;
int nargs;
int nreturns;
int handle;
} args = {
"close",
1,
0,
};
#ifdef OFW_DEBUG
printf("OF_close(%d)\n", handle);
#endif
args.handle = handle;
openfirmware(&args);
}
int
OF_write(int handle, void *addr, int len)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ihandle;
void *addr;
int len;
int actual;
} args = {
"write",
3,
1,
};
#ifdef OFW_DEBUG
if (len != 1)
printf("OF_write(%d, %p, %x) -> ", handle, addr, len);
#endif
args.ihandle = handle;
args.addr = addr;
args.len = len;
if (openfirmware(&args) == -1) {
#ifdef OFW_DEBUG
printf("lose\n");
#endif
return -1;
}
#ifdef OFW_DEBUG
if (len != 1)
printf("%x\n", args.actual);
#endif
return args.actual;
}
int
OF_read(int handle, void *addr, int len)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ihandle;
void *addr;
int len;
int actual;
} args = {
"read",
3,
1,
};
#ifdef OFW_DEBUG
if (len != 1)
printf("OF_read(%d, %p, %x) -> ", handle, addr, len);
#endif
args.ihandle = handle;
args.addr = addr;
args.len = len;
if (openfirmware(&args) == -1) {
#ifdef OFW_DEBUG
printf("lose\n");
#endif
return -1;
}
#ifdef OFW_DEBUG
if (len != 1)
printf("%x\n", args.actual);
#endif
return args.actual;
}
int
OF_seek(int handle, u_quad_t pos)
{
static struct {
const char *name;
int nargs;
int nreturns;
int handle;
int poshi;
int poslo;
int status;
} args = {
"seek",
3,
1,
};
#ifdef OFW_DEBUG
printf("OF_seek(%d, %x, %x) -> ", handle, (int)(pos >> 32), (int)pos);
#endif
args.handle = handle;
args.poshi = (int)(pos >> 32);
args.poslo = (int)pos;
if (openfirmware(&args) == -1) {
#ifdef OFW_DEBUG
printf("lose\n");
#endif
return -1;
}
#ifdef OFW_DEBUG
printf("%d\n", args.status);
#endif
return args.status;
}
void *
OF_claim(void *virt, u_int size, u_int align)
{
static struct {
const char *name;
int nargs;
int nreturns;
void *virt;
u_int size;
u_int align;
void *baseaddr;
} args = {
"claim",
3,
1,
};
#ifdef OFW_DEBUG
printf("OF_claim(%p, %x, %x) -> ", virt, size, align);
#endif
args.virt = virt;
args.size = size;
args.align = align;
if (openfirmware(&args) == -1) {
#ifdef OFW_DEBUG
printf("lose\n");
#endif
return (void *)-1;
}
#ifdef OFW_DEBUG
printf("%p\n", args.baseaddr);
#endif
return args.baseaddr;
}
void
OF_release(void *virt, u_int size)
{
static struct {
const char *name;
int nargs;
int nreturns;
void *virt;
u_int size;
} args = {
"release",
2,
0,
};
#ifdef OFW_DEBUG
printf("OF_release(%p, %x)\n", virt, size);
#endif
args.virt = virt;
args.size = size;
openfirmware(&args);
}
int
OF_milliseconds(void)
{
static struct {
const char *name;
int nargs;
int nreturns;
int ms;
} args = {
"milliseconds",
0,
1,
};
openfirmware(&args);
return args.ms;
}
#ifdef __notyet__
void
OF_chain(void *virt, u_int size, void (*entry)(), void *arg, u_int len)
{
static struct {
const char *name;
int nargs;
int nreturns;
void *virt;
u_int size;
void (*entry)();
void *arg;
u_int len;
} args = {
"chain",
5,
0,
};
args.virt = virt;
args.size = size;
args.entry = entry;
args.arg = arg;
args.len = len;
openfirmware(&args);
}
#else
void
OF_chain(void *virt, u_int size, boot_entry_t entry, void *arg, u_int len)
{
/*
* This is a REALLY dirty hack till the firmware gets this going
*/
#if 0
OF_release(virt, size);
#endif
entry(0, 0, openfirmware, arg, len);
}
#endif
int
OF_call_method(const char *method, int ihandle, int nargs, int nreturns, ...)
{
va_list ap;
static struct {
const char *name;
int nargs;
int nreturns;
const char *method;
int ihandle;
int args_n_results[12];
} args = {
"call-method",
2,
1,
};
int *ip, n;
if (nargs > 6)
return -1;
args.nargs = nargs + 2;
args.nreturns = nreturns + 1;
args.method = method;
args.ihandle = ihandle;
va_start(ap, nreturns);
for (ip = args.args_n_results + (n = nargs); --n >= 0;)
*--ip = va_arg(ap, int);
if (openfirmware(&args) == -1) {
va_end(ap);
return -1;
}
if (args.args_n_results[nargs]) {
va_end(ap);
return args.args_n_results[nargs];
}
for (ip = args.args_n_results + nargs + (n = args.nreturns); --n > 0;)
*va_arg(ap, int *) = *--ip;
va_end(ap);
return 0;
}
static int stdin;
static int stdout;
static void
setup(void)
{
int chosen;
if ((chosen = OF_finddevice("/chosen")) == -1)
OF_exit();
if (OF_getprop(chosen, "stdin", &stdin, sizeof(stdin)) !=
sizeof(stdin) ||
OF_getprop(chosen, "stdout", &stdout, sizeof(stdout)) !=
sizeof(stdout))
OF_exit();
}
void
putchar(int c)
{
char ch = c;
if (c == '\n')
putchar('\r');
OF_write(stdout, &ch, 1);
}
int
getchar(void)
{
unsigned char ch = '\0';
int l;
while ((l = OF_read(stdin, &ch, 1)) != 1)
if (l != -2 && l != 0)
return -1;
return ch;
}