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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <of.h>
#include <pci.h>
#include <cpu.h>
#include <ioctl.h>
#include <takeover.h>
extern void call_client_interface(of_arg_t *);
extern void m_sync(void);
int callback(int argc, char *argv[]);
#define boot_rom_bin_start _binary_______boot_rom_bin_start
#define boot_rom_bin_end _binary_______boot_rom_bin_end
extern char boot_rom_bin_start;
extern char boot_rom_bin_end;
#if defined(__GNUC__)
# define UNUSED __attribute__((unused))
#else
# define UNUSED
#endif
/*
* These functions are just dummy implemented to resolve symbols for linking to other objects
*/
int
open(const char *name UNUSED, int flags UNUSED)
{
return 0;
}
int
close(int fd UNUSED)
{
return 0;
}
ssize_t
read(int fd UNUSED, void *buf UNUSED, size_t count UNUSED)
{
return 0;
}
int
ioctl(int fd UNUSED, int req UNUSED, void *data UNUSED)
{
return 0;
}
/*
* These functions are required for using libc.a
*/
ssize_t
write(int fd, const void *buf, size_t len)
{
char dst_buf[512];
char *dst_buf_ptr;
char *src_buf_ptr;
int i;
src_buf_ptr = (char *) buf;
if (fd == 1 || fd == 2)
{
dst_buf_ptr = &dst_buf[0];
for (i = 0; i < len && i < 256; i++)
{
*dst_buf_ptr++ = *src_buf_ptr++;
if (src_buf_ptr[-1] == '\n')
*dst_buf_ptr++ = '\r';
}
len = dst_buf_ptr - &dst_buf[0];
src_buf_ptr = &dst_buf[0];
}
if(fd < 0 || fd >= FILEIO_MAX
|| fd_array[fd].type == FILEIO_TYPE_EMPTY
|| fd_array[fd].write == 0)
return -1;
return fd_array[fd].write(&fd_array[fd], src_buf_ptr, len);
}
void *
sbrk(int incr)
{
return (void *) -1;
}
static void
doWait(void)
{
static const char *wheel = "|/-\\";
static int i = 0;
volatile int dly = 0xf0000;
while (dly--)
asm volatile (" nop ");
printf("\b%c", wheel[i++]);
i &= 0x3;
}
static void
quiesce(void)
{
of_arg_t arg = {
p32cast "quiesce",
0, 0,
};
call_client_interface(&arg);
}
static int
startCpu(int num, int addr, int reg)
{
of_arg_t arg = {
p32cast "start-cpu",
3, 0,
{num, addr, reg}
};
call_client_interface(&arg);
return arg.args[3];
}
volatile unsigned long slaveQuitt;
int takeoverFlag;
void
main(int argc, char *argv[])
{
phandle_t cpus;
phandle_t cpu;
unsigned long slaveMask;
extern int slaveLoop[];
extern int slaveLoopNoTakeover[];
int index = 0;
int delay = 100;
unsigned long reg;
unsigned long msr;
asm volatile ("mfmsr %0":"=r" (msr));
if (msr & 0x1000000000000000)
takeoverFlag = 0;
else
takeoverFlag = 1;
cpus = of_finddevice("/cpus");
cpu = of_child(cpus);
slaveMask = 0;
while (cpu) {
char devType[100];
*devType = '\0';
of_getprop(cpu, "device_type", devType, sizeof(devType));
if (strcmp(devType, "cpu") == 0) {
of_getprop(cpu, "reg", ®, sizeof(reg));
if (index) {
printf("\r\n takeover on cpu%d (%x, %lx) ", index,
cpu, reg);
slaveQuitt = -1;
if (takeoverFlag)
startCpu(cpu, (int)(unsigned long)slaveLoop, index);
else
startCpu(cpu, (int)(unsigned long)slaveLoopNoTakeover,
index);
slaveMask |= 0x1 << index;
delay = 100;
while (delay-- && slaveQuitt)
doWait();
}
index++;
}
cpu = of_peer(cpu);
}
printf("\r\n takeover on master cpu ");
quiesce();
delay = 5;
while (delay--)
doWait();
if (takeoverFlag)
takeover();
memcpy((void*)TAKEOVERBASEADDRESS, &boot_rom_bin_start, &boot_rom_bin_end - &boot_rom_bin_start);
flush_cache((void *)TAKEOVERBASEADDRESS, &boot_rom_bin_end - &boot_rom_bin_start);
index = 0;
while (slaveMask) {
m_sync();
unsigned long shifter = 0x1 << index;
if (shifter & slaveMask) {
slaveQuitt = index;
while (slaveQuitt)
m_sync();
slaveMask &= ~shifter;
}
index++;
}
asm volatile(" mtctr %0 ; bctr " : : "r" (TAKEOVERBASEADDRESS+0x180) );
}
int
callback(int argc, char *argv[])
{
/* Dummy, only for takeover */
return (0);
}
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