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AppleSMC device emulation

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Intel Macs have a chip called the "AppleSMC" which they use to control
certain Apple specific parts of the hardware, like the keyboard background
light.

That chip is also used to store a key that Mac OS X uses to decrypt binaries.

This patch adds emulation for that chip, so we're getting one step further
to having Mac OS X run natively on Qemu.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Alexander Graf 2010-06-30 10:41:12 +02:00 committed by Blue Swirl
parent 1f5c3f8ca1
commit 1ddda5cd36
2 changed files with 242 additions and 1 deletions
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2
Makefile.target
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@ -192,7 +192,7 @@ obj-y += e1000.o
obj-i386-y += vga.o obj-i386-y += vga.o
obj-i386-y += mc146818rtc.o i8259.o pc.o obj-i386-y += mc146818rtc.o i8259.o pc.o
obj-i386-y += cirrus_vga.o apic.o ioapic.o piix_pci.o obj-i386-y += cirrus_vga.o apic.o ioapic.o piix_pci.o
obj-i386-y += vmmouse.o vmport.o hpet.o obj-i386-y += vmmouse.o vmport.o hpet.o applesmc.o
obj-i386-y += device-hotplug.o pci-hotplug.o smbios.o wdt_ib700.o obj-i386-y += device-hotplug.o pci-hotplug.o smbios.o wdt_ib700.o
obj-i386-y += debugcon.o multiboot.o obj-i386-y += debugcon.o multiboot.o
obj-i386-y += pc_piix.o obj-i386-y += pc_piix.o

241
hw/applesmc.c Normal file
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@ -0,0 +1,241 @@
/*
* Apple SMC controller
*
* Copyright (c) 2007 Alexander Graf
*
* Authors: Alexander Graf <agraf@suse.de>
* Susanne Graf <suse@csgraf.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* *****************************************************************
*
* In all Intel-based Apple hardware there is an SMC chip to control the
* backlight, fans and several other generic device parameters. It also
* contains the magic keys used to dongle Mac OS X to the device.
*
* This driver was mostly created by looking at the Linux AppleSMC driver
* implementation and does not support IRQ.
*
*/
#include "hw.h"
#include "isa.h"
#include "console.h"
#include "qemu-timer.h"
/* #define DEBUG_SMC */
#define APPLESMC_DEFAULT_IOBASE 0x300
/* data port used by Apple SMC */
#define APPLESMC_DATA_PORT 0x0
/* command/status port used by Apple SMC */
#define APPLESMC_CMD_PORT 0x4
#define APPLESMC_NR_PORTS 32
#define APPLESMC_MAX_DATA_LENGTH 32
#define APPLESMC_READ_CMD 0x10
#define APPLESMC_WRITE_CMD 0x11
#define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12
#define APPLESMC_GET_KEY_TYPE_CMD 0x13
#ifdef DEBUG_SMC
#define smc_debug(...) fprintf(stderr, "AppleSMC: " __VA_ARGS__)
#else
#define smc_debug(...) do { } while(0)
#endif
static char default_osk[64] = "This is a dummy key. Enter the real key "
"using the -osk parameter";
struct AppleSMCData {
uint8_t len;
const char *key;
const char *data;
QLIST_ENTRY(AppleSMCData) node;
};
struct AppleSMCStatus {
ISADevice dev;
uint32_t iobase;
uint8_t cmd;
uint8_t status;
uint8_t key[4];
uint8_t read_pos;
uint8_t data_len;
uint8_t data_pos;
uint8_t data[255];
uint8_t charactic[4];
char *osk;
QLIST_HEAD(, AppleSMCData) data_def;
};
static void applesmc_io_cmd_writeb(void *opaque, uint32_t addr, uint32_t val)
{
struct AppleSMCStatus *s = opaque;
smc_debug("CMD Write B: %#x = %#x\n", addr, val);
switch(val) {
case APPLESMC_READ_CMD:
s->status = 0x0c;
break;
}
s->cmd = val;
s->read_pos = 0;
s->data_pos = 0;
}
static void applesmc_fill_data(struct AppleSMCStatus *s)
{
struct AppleSMCData *d;
QLIST_FOREACH(d, &s->data_def, node) {
if (!memcmp(d->key, s->key, 4)) {
smc_debug("Key matched (%s Len=%d Data=%s)\n", d->key,
d->len, d->data);
memcpy(s->data, d->data, d->len);
return;
}
}
}
static void applesmc_io_data_writeb(void *opaque, uint32_t addr, uint32_t val)
{
struct AppleSMCStatus *s = opaque;
smc_debug("DATA Write B: %#x = %#x\n", addr, val);
switch(s->cmd) {
case APPLESMC_READ_CMD:
if(s->read_pos < 4) {
s->key[s->read_pos] = val;
s->status = 0x04;
} else if(s->read_pos == 4) {
s->data_len = val;
s->status = 0x05;
s->data_pos = 0;
smc_debug("Key = %c%c%c%c Len = %d\n", s->key[0],
s->key[1], s->key[2], s->key[3], val);
applesmc_fill_data(s);
}
s->read_pos++;
break;
}
}
static uint32_t applesmc_io_data_readb(void *opaque, uint32_t addr1)
{
struct AppleSMCStatus *s = opaque;
uint8_t retval = 0;
switch(s->cmd) {
case APPLESMC_READ_CMD:
if(s->data_pos < s->data_len) {
retval = s->data[s->data_pos];
smc_debug("READ_DATA[%d] = %#hhx\n", s->data_pos,
retval);
s->data_pos++;
if(s->data_pos == s->data_len) {
s->status = 0x00;
smc_debug("EOF\n");
} else
s->status = 0x05;
}
}
smc_debug("DATA Read b: %#x = %#x\n", addr1, retval);
return retval;
}
static uint32_t applesmc_io_cmd_readb(void *opaque, uint32_t addr1)
{
struct AppleSMCStatus *s = opaque;
smc_debug("CMD Read B: %#x\n", addr1);
return s->status;
}
static void applesmc_add_key(struct AppleSMCStatus *s, const char *key,
int len, const char *data)
{
struct AppleSMCData *def;
def = qemu_mallocz(sizeof(struct AppleSMCData));
def->key = key;
def->len = len;
def->data = data;
QLIST_INSERT_HEAD(&s->data_def, def, node);
}
static void qdev_applesmc_isa_reset(DeviceState *dev)
{
struct AppleSMCStatus *s = DO_UPCAST(struct AppleSMCStatus, dev.qdev, dev);
struct AppleSMCData *d, *next;
/* Remove existing entries */
QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
QLIST_REMOVE(d, node);
}
applesmc_add_key(s, "REV ", 6, "\0x01\0x13\0x0f\0x00\0x00\0x03");
applesmc_add_key(s, "OSK0", 32, s->osk);
applesmc_add_key(s, "OSK1", 32, s->osk + 32);
applesmc_add_key(s, "NATJ", 1, "\0");
applesmc_add_key(s, "MSSP", 1, "\0");
applesmc_add_key(s, "MSSD", 1, "\0x3");
}
static int applesmc_isa_init(ISADevice *dev)
{
struct AppleSMCStatus *s = DO_UPCAST(struct AppleSMCStatus, dev, dev);
register_ioport_read(s->iobase + APPLESMC_DATA_PORT, 4, 1,
applesmc_io_data_readb, s);
register_ioport_read(s->iobase + APPLESMC_CMD_PORT, 4, 1,
applesmc_io_cmd_readb, s);
register_ioport_write(s->iobase + APPLESMC_DATA_PORT, 4, 1,
applesmc_io_data_writeb, s);
register_ioport_write(s->iobase + APPLESMC_CMD_PORT, 4, 1,
applesmc_io_cmd_writeb, s);
if (!s->osk || (strlen(s->osk) != 64)) {
fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n");
s->osk = default_osk;
}
QLIST_INIT(&s->data_def);
qdev_applesmc_isa_reset(&dev->qdev);
return 0;
}
static ISADeviceInfo applesmc_isa_info = {
.qdev.name = "isa-applesmc",
.qdev.size = sizeof(struct AppleSMCStatus),
.qdev.reset = qdev_applesmc_isa_reset,
.init = applesmc_isa_init,
.qdev.props = (Property[]) {
DEFINE_PROP_HEX32("iobase", struct AppleSMCStatus, iobase,
APPLESMC_DEFAULT_IOBASE),
DEFINE_PROP_STRING("osk", struct AppleSMCStatus, osk),
DEFINE_PROP_END_OF_LIST(),
},
};
static void applesmc_register_devices(void)
{
isa_qdev_register(&applesmc_isa_info);
}
device_init(applesmc_register_devices)