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xemu/hw/ppc/prep.c
Mark Cave-Ayland 6de0497385 m48t59: introduce new base-year qdev property 
Currently the m48t59 device uses the hardware model in order to determine
whether the year value is offset from the hardware value. As this will
soon be required by the x59 model, create a qdev base-year property to
represent the base year and update the callers appropriately.

Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
CC: Andreas Färber <afaerber@suse.de>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2015-03-10 09:18:56 +00:00

717 lines
21 KiB
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/*
* QEMU PPC PREP hardware System Emulator
*
* Copyright (c) 2003-2007 Jocelyn Mayer
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw/hw.h"
#include "hw/timer/m48t59.h"
#include "hw/i386/pc.h"
#include "hw/char/serial.h"
#include "hw/block/fdc.h"
#include "net/net.h"
#include "sysemu/sysemu.h"
#include "hw/isa/isa.h"
#include "hw/pci/pci.h"
#include "hw/pci/pci_host.h"
#include "hw/ppc/ppc.h"
#include "hw/boards.h"
#include "qemu/log.h"
#include "hw/ide.h"
#include "hw/loader.h"
#include "hw/timer/mc146818rtc.h"
#include "hw/isa/pc87312.h"
#include "sysemu/block-backend.h"
#include "sysemu/arch_init.h"
#include "sysemu/qtest.h"
#include "exec/address-spaces.h"
#include "elf.h"
//#define HARD_DEBUG_PPC_IO
//#define DEBUG_PPC_IO
/* SMP is not enabled, for now */
#define MAX_CPUS 1
#define MAX_IDE_BUS 2
#define BIOS_SIZE (1024 * 1024)
#define BIOS_FILENAME "ppc_rom.bin"
#define KERNEL_LOAD_ADDR 0x01000000
#define INITRD_LOAD_ADDR 0x01800000
#if defined (HARD_DEBUG_PPC_IO) && !defined (DEBUG_PPC_IO)
#define DEBUG_PPC_IO
#endif
#if defined (HARD_DEBUG_PPC_IO)
#define PPC_IO_DPRINTF(fmt, ...) \
do { \
if (qemu_loglevel_mask(CPU_LOG_IOPORT)) { \
qemu_log("%s: " fmt, __func__ , ## __VA_ARGS__); \
} else { \
printf("%s : " fmt, __func__ , ## __VA_ARGS__); \
} \
} while (0)
#elif defined (DEBUG_PPC_IO)
#define PPC_IO_DPRINTF(fmt, ...) \
qemu_log_mask(CPU_LOG_IOPORT, fmt, ## __VA_ARGS__)
#else
#define PPC_IO_DPRINTF(fmt, ...) do { } while (0)
#endif
/* Constants for devices init */
static const int ide_iobase[2] = { 0x1f0, 0x170 };
static const int ide_iobase2[2] = { 0x3f6, 0x376 };
static const int ide_irq[2] = { 13, 13 };
#define NE2000_NB_MAX 6
static uint32_t ne2000_io[NE2000_NB_MAX] = { 0x300, 0x320, 0x340, 0x360, 0x280, 0x380 };
static int ne2000_irq[NE2000_NB_MAX] = { 9, 10, 11, 3, 4, 5 };
/* ISA IO ports bridge */
#define PPC_IO_BASE 0x80000000
/* PowerPC control and status registers */
#if 0 // Not used
static struct {
/* IDs */
uint32_t veni_devi;
uint32_t revi;
/* Control and status */
uint32_t gcsr;
uint32_t xcfr;
uint32_t ct32;
uint32_t mcsr;
/* General purpose registers */
uint32_t gprg[6];
/* Exceptions */
uint32_t feen;
uint32_t fest;
uint32_t fema;
uint32_t fecl;
uint32_t eeen;
uint32_t eest;
uint32_t eecl;
uint32_t eeint;
uint32_t eemck0;
uint32_t eemck1;
/* Error diagnostic */
} XCSR;
static void PPC_XCSR_writeb (void *opaque,
hwaddr addr, uint32_t value)
{
printf("%s: 0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", __func__, addr,
value);
}
static void PPC_XCSR_writew (void *opaque,
hwaddr addr, uint32_t value)
{
printf("%s: 0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", __func__, addr,
value);
}
static void PPC_XCSR_writel (void *opaque,
hwaddr addr, uint32_t value)
{
printf("%s: 0x" TARGET_FMT_plx " => 0x%08" PRIx32 "\n", __func__, addr,
value);
}
static uint32_t PPC_XCSR_readb (void *opaque, hwaddr addr)
{
uint32_t retval = 0;
printf("%s: 0x" TARGET_FMT_plx " <= %08" PRIx32 "\n", __func__, addr,
retval);
return retval;
}
static uint32_t PPC_XCSR_readw (void *opaque, hwaddr addr)
{
uint32_t retval = 0;
printf("%s: 0x" TARGET_FMT_plx " <= %08" PRIx32 "\n", __func__, addr,
retval);
return retval;
}
static uint32_t PPC_XCSR_readl (void *opaque, hwaddr addr)
{
uint32_t retval = 0;
printf("%s: 0x" TARGET_FMT_plx " <= %08" PRIx32 "\n", __func__, addr,
retval);
return retval;
}
static const MemoryRegionOps PPC_XCSR_ops = {
.old_mmio = {
.read = { PPC_XCSR_readb, PPC_XCSR_readw, PPC_XCSR_readl, },
.write = { PPC_XCSR_writeb, PPC_XCSR_writew, PPC_XCSR_writel, },
},
.endianness = DEVICE_LITTLE_ENDIAN,
};
#endif
/* Fake super-io ports for PREP platform (Intel 82378ZB) */
typedef struct sysctrl_t {
qemu_irq reset_irq;
Nvram *nvram;
uint8_t state;
uint8_t syscontrol;
int contiguous_map;
qemu_irq contiguous_map_irq;
int endian;
} sysctrl_t;
enum {
STATE_HARDFILE = 0x01,
};
static sysctrl_t *sysctrl;
static void PREP_io_800_writeb (void *opaque, uint32_t addr, uint32_t val)
{
sysctrl_t *sysctrl = opaque;
PPC_IO_DPRINTF("0x%08" PRIx32 " => 0x%02" PRIx32 "\n",
addr - PPC_IO_BASE, val);
switch (addr) {
case 0x0092:
/* Special port 92 */
/* Check soft reset asked */
if (val & 0x01) {
qemu_irq_raise(sysctrl->reset_irq);
} else {
qemu_irq_lower(sysctrl->reset_irq);
}
/* Check LE mode */
if (val & 0x02) {
sysctrl->endian = 1;
} else {
sysctrl->endian = 0;
}
break;
case 0x0800:
/* Motorola CPU configuration register : read-only */
break;
case 0x0802:
/* Motorola base module feature register : read-only */
break;
case 0x0803:
/* Motorola base module status register : read-only */
break;
case 0x0808:
/* Hardfile light register */
if (val & 1)
sysctrl->state |= STATE_HARDFILE;
else
sysctrl->state &= ~STATE_HARDFILE;
break;
case 0x0810:
/* Password protect 1 register */
if (sysctrl->nvram != NULL) {
NvramClass *k = NVRAM_GET_CLASS(sysctrl->nvram);
(k->toggle_lock)(sysctrl->nvram, 1);
}
break;
case 0x0812:
/* Password protect 2 register */
if (sysctrl->nvram != NULL) {
NvramClass *k = NVRAM_GET_CLASS(sysctrl->nvram);
(k->toggle_lock)(sysctrl->nvram, 2);
}
break;
case 0x0814:
/* L2 invalidate register */
// tlb_flush(first_cpu, 1);
break;
case 0x081C:
/* system control register */
sysctrl->syscontrol = val & 0x0F;
break;
case 0x0850:
/* I/O map type register */
sysctrl->contiguous_map = val & 0x01;
qemu_set_irq(sysctrl->contiguous_map_irq, sysctrl->contiguous_map);
break;
default:
printf("ERROR: unaffected IO port write: %04" PRIx32
" => %02" PRIx32"\n", addr, val);
break;
}
}
static uint32_t PREP_io_800_readb (void *opaque, uint32_t addr)
{
sysctrl_t *sysctrl = opaque;
uint32_t retval = 0xFF;
switch (addr) {
case 0x0092:
/* Special port 92 */
retval = sysctrl->endian << 1;
break;
case 0x0800:
/* Motorola CPU configuration register */
retval = 0xEF; /* MPC750 */
break;
case 0x0802:
/* Motorola Base module feature register */
retval = 0xAD; /* No ESCC, PMC slot neither ethernet */
break;
case 0x0803:
/* Motorola base module status register */
retval = 0xE0; /* Standard MPC750 */
break;
case 0x080C:
/* Equipment present register:
* no L2 cache
* no upgrade processor
* no cards in PCI slots
* SCSI fuse is bad
*/
retval = 0x3C;
break;
case 0x0810:
/* Motorola base module extended feature register */
retval = 0x39; /* No USB, CF and PCI bridge. NVRAM present */
break;
case 0x0814:
/* L2 invalidate: don't care */
break;
case 0x0818:
/* Keylock */
retval = 0x00;
break;
case 0x081C:
/* system control register
* 7 - 6 / 1 - 0: L2 cache enable
*/
retval = sysctrl->syscontrol;
break;
case 0x0823:
/* */
retval = 0x03; /* no L2 cache */
break;
case 0x0850:
/* I/O map type register */
retval = sysctrl->contiguous_map;
break;
default:
printf("ERROR: unaffected IO port: %04" PRIx32 " read\n", addr);
break;
}
PPC_IO_DPRINTF("0x%08" PRIx32 " <= 0x%02" PRIx32 "\n",
addr - PPC_IO_BASE, retval);
return retval;
}
#define NVRAM_SIZE 0x2000
static void cpu_request_exit(void *opaque, int irq, int level)
{
CPUState *cpu = current_cpu;
if (cpu && level) {
cpu_exit(cpu);
}
}
static void ppc_prep_reset(void *opaque)
{
PowerPCCPU *cpu = opaque;
cpu_reset(CPU(cpu));
}
static const MemoryRegionPortio prep_portio_list[] = {
/* System control ports */
{ 0x0092, 1, 1, .read = PREP_io_800_readb, .write = PREP_io_800_writeb, },
{ 0x0800, 0x52, 1,
.read = PREP_io_800_readb, .write = PREP_io_800_writeb, },
/* Special port to get debug messages from Open-Firmware */
{ 0x0F00, 4, 1, .write = PPC_debug_write, },
PORTIO_END_OF_LIST(),
};
static PortioList prep_port_list;
/*****************************************************************************/
/* NVRAM helpers */
static inline uint32_t nvram_read(Nvram *nvram, uint32_t addr)
{
NvramClass *k = NVRAM_GET_CLASS(sysctrl->nvram);
return (k->read)(nvram, addr);
}
static inline void nvram_write(Nvram *nvram, uint32_t addr, uint32_t val)
{
NvramClass *k = NVRAM_GET_CLASS(sysctrl->nvram);
(k->write)(nvram, addr, val);
}
static void NVRAM_set_byte(Nvram *nvram, uint32_t addr, uint8_t value)
{
nvram_write(nvram, addr, value);
}
static uint8_t NVRAM_get_byte(Nvram *nvram, uint32_t addr)
{
return nvram_read(nvram, addr);
}
static void NVRAM_set_word(Nvram *nvram, uint32_t addr, uint16_t value)
{
nvram_write(nvram, addr, value >> 8);
nvram_write(nvram, addr + 1, value & 0xFF);
}
static uint16_t NVRAM_get_word(Nvram *nvram, uint32_t addr)
{
uint16_t tmp;
tmp = nvram_read(nvram, addr) << 8;
tmp |= nvram_read(nvram, addr + 1);
return tmp;
}
static void NVRAM_set_lword(Nvram *nvram, uint32_t addr, uint32_t value)
{
nvram_write(nvram, addr, value >> 24);
nvram_write(nvram, addr + 1, (value >> 16) & 0xFF);
nvram_write(nvram, addr + 2, (value >> 8) & 0xFF);
nvram_write(nvram, addr + 3, value & 0xFF);
}
static void NVRAM_set_string(Nvram *nvram, uint32_t addr, const char *str,
uint32_t max)
{
int i;
for (i = 0; i < max && str[i] != '\0'; i++) {
nvram_write(nvram, addr + i, str[i]);
}
nvram_write(nvram, addr + i, str[i]);
nvram_write(nvram, addr + max - 1, '\0');
}
static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
{
uint16_t tmp;
uint16_t pd, pd1, pd2;
tmp = prev >> 8;
pd = prev ^ value;
pd1 = pd & 0x000F;
pd2 = ((pd >> 4) & 0x000F) ^ pd1;
tmp ^= (pd1 << 3) | (pd1 << 8);
tmp ^= pd2 | (pd2 << 7) | (pd2 << 12);
return tmp;
}
static uint16_t NVRAM_compute_crc (Nvram *nvram, uint32_t start, uint32_t count)
{
uint32_t i;
uint16_t crc = 0xFFFF;
int odd;
odd = count & 1;
count &= ~1;
for (i = 0; i != count; i++) {
crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i));
}
if (odd) {
crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
}
return crc;
}
#define CMDLINE_ADDR 0x017ff000
static int PPC_NVRAM_set_params (Nvram *nvram, uint16_t NVRAM_size,
const char *arch,
uint32_t RAM_size, int boot_device,
uint32_t kernel_image, uint32_t kernel_size,
const char *cmdline,
uint32_t initrd_image, uint32_t initrd_size,
uint32_t NVRAM_image,
int width, int height, int depth)
{
uint16_t crc;
/* Set parameters for Open Hack'Ware BIOS */
NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16);
NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */
NVRAM_set_word(nvram, 0x14, NVRAM_size);
NVRAM_set_string(nvram, 0x20, arch, 16);
NVRAM_set_lword(nvram, 0x30, RAM_size);
NVRAM_set_byte(nvram, 0x34, boot_device);
NVRAM_set_lword(nvram, 0x38, kernel_image);
NVRAM_set_lword(nvram, 0x3C, kernel_size);
if (cmdline) {
/* XXX: put the cmdline in NVRAM too ? */
pstrcpy_targphys("cmdline", CMDLINE_ADDR, RAM_size - CMDLINE_ADDR,
cmdline);
NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
} else {
NVRAM_set_lword(nvram, 0x40, 0);
NVRAM_set_lword(nvram, 0x44, 0);
}
NVRAM_set_lword(nvram, 0x48, initrd_image);
NVRAM_set_lword(nvram, 0x4C, initrd_size);
NVRAM_set_lword(nvram, 0x50, NVRAM_image);
NVRAM_set_word(nvram, 0x54, width);
NVRAM_set_word(nvram, 0x56, height);
NVRAM_set_word(nvram, 0x58, depth);
crc = NVRAM_compute_crc(nvram, 0x00, 0xF8);
NVRAM_set_word(nvram, 0xFC, crc);
return 0;
}
/* PowerPC PREP hardware initialisation */
static void ppc_prep_init(MachineState *machine)
{
ram_addr_t ram_size = machine->ram_size;
const char *cpu_model = machine->cpu_model;
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
const char *boot_device = machine->boot_order;
MemoryRegion *sysmem = get_system_memory();
PowerPCCPU *cpu = NULL;
CPUPPCState *env = NULL;
Nvram *m48t59;
#if 0
MemoryRegion *xcsr = g_new(MemoryRegion, 1);
#endif
int linux_boot, i, nb_nics1;
MemoryRegion *ram = g_new(MemoryRegion, 1);
uint32_t kernel_base, initrd_base;
long kernel_size, initrd_size;
DeviceState *dev;
PCIHostState *pcihost;
PCIBus *pci_bus;
PCIDevice *pci;
ISABus *isa_bus;
ISADevice *isa;
qemu_irq *cpu_exit_irq;
int ppc_boot_device;
DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
sysctrl = g_malloc0(sizeof(sysctrl_t));
linux_boot = (kernel_filename != NULL);
/* init CPUs */
if (cpu_model == NULL)
cpu_model = "602";
for (i = 0; i < smp_cpus; i++) {
cpu = cpu_ppc_init(cpu_model);
if (cpu == NULL) {
fprintf(stderr, "Unable to find PowerPC CPU definition\n");
exit(1);
}
env = &cpu->env;
if (env->flags & POWERPC_FLAG_RTC_CLK) {
/* POWER / PowerPC 601 RTC clock frequency is 7.8125 MHz */
cpu_ppc_tb_init(env, 7812500UL);
} else {
/* Set time-base frequency to 100 Mhz */
cpu_ppc_tb_init(env, 100UL * 1000UL * 1000UL);
}
qemu_register_reset(ppc_prep_reset, cpu);
}
/* allocate RAM */
memory_region_allocate_system_memory(ram, NULL, "ppc_prep.ram", ram_size);
memory_region_add_subregion(sysmem, 0, ram);
if (linux_boot) {
kernel_base = KERNEL_LOAD_ADDR;
/* now we can load the kernel */
kernel_size = load_image_targphys(kernel_filename, kernel_base,
ram_size - kernel_base);
if (kernel_size < 0) {
hw_error("qemu: could not load kernel '%s'\n", kernel_filename);
exit(1);
}
/* load initrd */
if (initrd_filename) {
initrd_base = INITRD_LOAD_ADDR;
initrd_size = load_image_targphys(initrd_filename, initrd_base,
ram_size - initrd_base);
if (initrd_size < 0) {
hw_error("qemu: could not load initial ram disk '%s'\n",
initrd_filename);
}
} else {
initrd_base = 0;
initrd_size = 0;
}
ppc_boot_device = 'm';
} else {
kernel_base = 0;
kernel_size = 0;
initrd_base = 0;
initrd_size = 0;
ppc_boot_device = '\0';
/* For now, OHW cannot boot from the network. */
for (i = 0; boot_device[i] != '\0'; i++) {
if (boot_device[i] >= 'a' && boot_device[i] <= 'f') {
ppc_boot_device = boot_device[i];
break;
}
}
if (ppc_boot_device == '\0') {
fprintf(stderr, "No valid boot device for Mac99 machine\n");
exit(1);
}
}
if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
hw_error("Only 6xx bus is supported on PREP machine\n");
}
dev = qdev_create(NULL, "raven-pcihost");
if (bios_name == NULL) {
bios_name = BIOS_FILENAME;
}
qdev_prop_set_string(dev, "bios-name", bios_name);
qdev_prop_set_uint32(dev, "elf-machine", ELF_MACHINE);
pcihost = PCI_HOST_BRIDGE(dev);
object_property_add_child(qdev_get_machine(), "raven", OBJECT(dev), NULL);
qdev_init_nofail(dev);
pci_bus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
if (pci_bus == NULL) {
fprintf(stderr, "Couldn't create PCI host controller.\n");
exit(1);
}
sysctrl->contiguous_map_irq = qdev_get_gpio_in(dev, 0);
/* PCI -> ISA bridge */
pci = pci_create_simple(pci_bus, PCI_DEVFN(1, 0), "i82378");
cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);
cpu = POWERPC_CPU(first_cpu);
qdev_connect_gpio_out(&pci->qdev, 0,
cpu->env.irq_inputs[PPC6xx_INPUT_INT]);
qdev_connect_gpio_out(&pci->qdev, 1, *cpu_exit_irq);
sysbus_connect_irq(&pcihost->busdev, 0, qdev_get_gpio_in(&pci->qdev, 9));
sysbus_connect_irq(&pcihost->busdev, 1, qdev_get_gpio_in(&pci->qdev, 11));
sysbus_connect_irq(&pcihost->busdev, 2, qdev_get_gpio_in(&pci->qdev, 9));
sysbus_connect_irq(&pcihost->busdev, 3, qdev_get_gpio_in(&pci->qdev, 11));
isa_bus = ISA_BUS(qdev_get_child_bus(DEVICE(pci), "isa.0"));
/* Super I/O (parallel + serial ports) */
isa = isa_create(isa_bus, TYPE_PC87312);
dev = DEVICE(isa);
qdev_prop_set_uint8(dev, "config", 13); /* fdc, ser0, ser1, par0 */
qdev_init_nofail(dev);
/* init basic PC hardware */
pci_vga_init(pci_bus);
nb_nics1 = nb_nics;
if (nb_nics1 > NE2000_NB_MAX)
nb_nics1 = NE2000_NB_MAX;
for(i = 0; i < nb_nics1; i++) {
if (nd_table[i].model == NULL) {
nd_table[i].model = g_strdup("ne2k_isa");
}
if (strcmp(nd_table[i].model, "ne2k_isa") == 0) {
isa_ne2000_init(isa_bus, ne2000_io[i], ne2000_irq[i],
&nd_table[i]);
} else {
pci_nic_init_nofail(&nd_table[i], pci_bus, "ne2k_pci", NULL);
}
}
ide_drive_get(hd, ARRAY_SIZE(hd));
for(i = 0; i < MAX_IDE_BUS; i++) {
isa_ide_init(isa_bus, ide_iobase[i], ide_iobase2[i], ide_irq[i],
hd[2 * i],
hd[2 * i + 1]);
}
isa_create_simple(isa_bus, "i8042");
cpu = POWERPC_CPU(first_cpu);
sysctrl->reset_irq = cpu->env.irq_inputs[PPC6xx_INPUT_HRESET];
portio_list_init(&prep_port_list, NULL, prep_portio_list, sysctrl, "prep");
portio_list_add(&prep_port_list, isa_address_space_io(isa), 0x0);
/* PowerPC control and status register group */
#if 0
memory_region_init_io(xcsr, NULL, &PPC_XCSR_ops, NULL, "ppc-xcsr", 0x1000);
memory_region_add_subregion(sysmem, 0xFEFF0000, xcsr);
#endif
if (usb_enabled()) {
pci_create_simple(pci_bus, -1, "pci-ohci");
}
m48t59 = m48t59_init_isa(isa_bus, 0x0074, NVRAM_SIZE, 2000, 59);
if (m48t59 == NULL)
return;
sysctrl->nvram = m48t59;
/* Initialise NVRAM */
PPC_NVRAM_set_params(m48t59, NVRAM_SIZE, "PREP", ram_size,
ppc_boot_device,
kernel_base, kernel_size,
kernel_cmdline,
initrd_base, initrd_size,
/* XXX: need an option to load a NVRAM image */
0,
graphic_width, graphic_height, graphic_depth);
}
static QEMUMachine prep_machine = {
.name = "prep",
.desc = "PowerPC PREP platform",
.init = ppc_prep_init,
.max_cpus = MAX_CPUS,
.default_boot_order = "cad",
};
static void prep_machine_init(void)
{
qemu_register_machine(&prep_machine);
}
machine_init(prep_machine_init);
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