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qemu/hw/m68k/q800.c
Jason A. Donenfeld e24e58e8ac q800: implement mac rom reset function for BIOS-less mode 
On Linux, calling `reboot(RB_AUTOBOOT);` will result in
arch/m68k/mac/misc.c's mac_reset function being called. That in turn
looks at the rombase (or uses 0x40800000 is there's no rombase), adds
0xa, and jumps to that address. At the moment, there's nothing there, so
the kernel just crashes when trying to reboot. So, this commit adds a
very simple implementation at that location, which just writes to via2
to power down. We also correct the value of ROMBASE while we're at it.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200102120150.281082-1-Jason@zx2c4.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2020-01-07 13:35:53 +01:00

459 lines
15 KiB
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/*
* QEMU Motorla 680x0 Macintosh hardware System Emulator
*
* 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 "qemu/osdep.h"
#include "qemu/units.h"
#include "qemu-common.h"
#include "sysemu/sysemu.h"
#include "cpu.h"
#include "hw/hw.h"
#include "hw/boards.h"
#include "hw/irq.h"
#include "elf.h"
#include "hw/loader.h"
#include "ui/console.h"
#include "exec/address-spaces.h"
#include "hw/char/escc.h"
#include "hw/sysbus.h"
#include "hw/scsi/esp.h"
#include "bootinfo.h"
#include "hw/misc/mac_via.h"
#include "hw/input/adb.h"
#include "hw/nubus/mac-nubus-bridge.h"
#include "hw/display/macfb.h"
#include "hw/block/swim.h"
#include "net/net.h"
#include "qapi/error.h"
#include "sysemu/qtest.h"
#include "sysemu/runstate.h"
#include "sysemu/reset.h"
#define MACROM_ADDR 0x40800000
#define MACROM_SIZE 0x00100000
#define MACROM_FILENAME "MacROM.bin"
#define Q800_MACHINE_ID 35
#define Q800_CPU_ID (1 << 2)
#define Q800_FPU_ID (1 << 2)
#define Q800_MMU_ID (1 << 2)
#define MACH_MAC 3
#define Q800_MAC_CPU_ID 2
#define IO_BASE 0x50000000
#define IO_SLICE 0x00040000
#define IO_SIZE 0x04000000
#define VIA_BASE (IO_BASE + 0x00000)
#define SONIC_PROM_BASE (IO_BASE + 0x08000)
#define SONIC_BASE (IO_BASE + 0x0a000)
#define SCC_BASE (IO_BASE + 0x0c020)
#define ESP_BASE (IO_BASE + 0x10000)
#define ESP_PDMA (IO_BASE + 0x10100)
#define ASC_BASE (IO_BASE + 0x14000)
#define SWIM_BASE (IO_BASE + 0x1E000)
#define NUBUS_SUPER_SLOT_BASE 0x60000000
#define NUBUS_SLOT_BASE 0xf0000000
/*
* the video base, whereas it a Nubus address,
* is needed by the kernel to have early display and
* thus provided by the bootloader
*/
#define VIDEO_BASE 0xf9001000
#define MAC_CLOCK 3686418
/*
* The GLUE (General Logic Unit) is an Apple custom integrated circuit chip
* that performs a variety of functions (RAM management, clock generation, ...).
* The GLUE chip receives interrupt requests from various devices,
* assign priority to each, and asserts one or more interrupt line to the
* CPU.
*/
typedef struct {
M68kCPU *cpu;
uint8_t ipr;
} GLUEState;
static void GLUE_set_irq(void *opaque, int irq, int level)
{
GLUEState *s = opaque;
int i;
if (level) {
s->ipr |= 1 << irq;
} else {
s->ipr &= ~(1 << irq);
}
for (i = 7; i >= 0; i--) {
if ((s->ipr >> i) & 1) {
m68k_set_irq_level(s->cpu, i + 1, i + 25);
return;
}
}
m68k_set_irq_level(s->cpu, 0, 0);
}
static void main_cpu_reset(void *opaque)
{
M68kCPU *cpu = opaque;
CPUState *cs = CPU(cpu);
cpu_reset(cs);
cpu->env.aregs[7] = ldl_phys(cs->as, 0);
cpu->env.pc = ldl_phys(cs->as, 4);
}
static uint8_t fake_mac_rom[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* offset: 0xa - mac_reset */
/* via2[vDirB] |= VIA2B_vPower */
0x20, 0x7C, 0x50, 0xF0, 0x24, 0x00, /* moveal VIA2_BASE+vDirB,%a0 */
0x10, 0x10, /* moveb %a0@,%d0 */
0x00, 0x00, 0x00, 0x04, /* orib #4,%d0 */
0x10, 0x80, /* moveb %d0,%a0@ */
/* via2[vBufB] &= ~VIA2B_vPower */
0x20, 0x7C, 0x50, 0xF0, 0x20, 0x00, /* moveal VIA2_BASE+vBufB,%a0 */
0x10, 0x10, /* moveb %a0@,%d0 */
0x02, 0x00, 0xFF, 0xFB, /* andib #-5,%d0 */
0x10, 0x80, /* moveb %d0,%a0@ */
/* while (true) ; */
0x60, 0xFE /* bras [self] */
};
static void q800_init(MachineState *machine)
{
M68kCPU *cpu = NULL;
int linux_boot;
int32_t kernel_size;
uint64_t elf_entry;
char *filename;
int bios_size;
ram_addr_t initrd_base;
int32_t initrd_size;
MemoryRegion *rom;
MemoryRegion *ram;
MemoryRegion *io;
const int io_slice_nb = (IO_SIZE / IO_SLICE) - 1;
int i;
ram_addr_t ram_size = machine->ram_size;
const char *kernel_filename = machine->kernel_filename;
const char *initrd_filename = machine->initrd_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
hwaddr parameters_base;
CPUState *cs;
DeviceState *dev;
DeviceState *via_dev;
SysBusESPState *sysbus_esp;
ESPState *esp;
SysBusDevice *sysbus;
BusState *adb_bus;
NubusBus *nubus;
GLUEState *irq;
qemu_irq *pic;
DriveInfo *dinfo;
linux_boot = (kernel_filename != NULL);
if (ram_size > 1 * GiB) {
error_report("Too much memory for this machine: %" PRId64 " MiB, "
"maximum 1024 MiB", ram_size / MiB);
exit(1);
}
/* init CPUs */
cpu = M68K_CPU(cpu_create(machine->cpu_type));
qemu_register_reset(main_cpu_reset, cpu);
/* RAM */
ram = g_malloc(sizeof(*ram));
memory_region_init_ram(ram, NULL, "m68k_mac.ram", ram_size, &error_abort);
memory_region_add_subregion(get_system_memory(), 0, ram);
/*
* Memory from IO_BASE to IO_BASE + IO_SLICE is repeated
* from IO_BASE + IO_SLICE to IO_BASE + IO_SIZE
*/
io = g_new(MemoryRegion, io_slice_nb);
for (i = 0; i < io_slice_nb; i++) {
char *name = g_strdup_printf("mac_m68k.io[%d]", i + 1);
memory_region_init_alias(&io[i], NULL, name, get_system_memory(),
IO_BASE, IO_SLICE);
memory_region_add_subregion(get_system_memory(),
IO_BASE + (i + 1) * IO_SLICE, &io[i]);
g_free(name);
}
/* IRQ Glue */
irq = g_new0(GLUEState, 1);
irq->cpu = cpu;
pic = qemu_allocate_irqs(GLUE_set_irq, irq, 8);
/* VIA */
via_dev = qdev_create(NULL, TYPE_MAC_VIA);
dinfo = drive_get(IF_MTD, 0, 0);
if (dinfo) {
qdev_prop_set_drive(via_dev, "drive", blk_by_legacy_dinfo(dinfo),
&error_abort);
}
qdev_init_nofail(via_dev);
sysbus = SYS_BUS_DEVICE(via_dev);
sysbus_mmio_map(sysbus, 0, VIA_BASE);
qdev_connect_gpio_out_named(DEVICE(sysbus), "irq", 0, pic[0]);
qdev_connect_gpio_out_named(DEVICE(sysbus), "irq", 1, pic[1]);
adb_bus = qdev_get_child_bus(via_dev, "adb.0");
dev = qdev_create(adb_bus, TYPE_ADB_KEYBOARD);
qdev_init_nofail(dev);
dev = qdev_create(adb_bus, TYPE_ADB_MOUSE);
qdev_init_nofail(dev);
/* MACSONIC */
if (nb_nics > 1) {
error_report("q800 can only have one ethernet interface");
exit(1);
}
qemu_check_nic_model(&nd_table[0], "dp83932");
/*
* MacSonic driver needs an Apple MAC address
* Valid prefix are:
* 00:05:02 Apple
* 00:80:19 Dayna Communications, Inc.
* 00:A0:40 Apple
* 08:00:07 Apple
* (Q800 use the last one)
*/
nd_table[0].macaddr.a[0] = 0x08;
nd_table[0].macaddr.a[1] = 0x00;
nd_table[0].macaddr.a[2] = 0x07;
dev = qdev_create(NULL, "dp8393x");
qdev_set_nic_properties(dev, &nd_table[0]);
qdev_prop_set_uint8(dev, "it_shift", 2);
qdev_prop_set_bit(dev, "big_endian", true);
qdev_prop_set_ptr(dev, "dma_mr", get_system_memory());
qdev_init_nofail(dev);
sysbus = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(sysbus, 0, SONIC_BASE);
sysbus_mmio_map(sysbus, 1, SONIC_PROM_BASE);
sysbus_connect_irq(sysbus, 0, pic[2]);
/* SCC */
dev = qdev_create(NULL, TYPE_ESCC);
qdev_prop_set_uint32(dev, "disabled", 0);
qdev_prop_set_uint32(dev, "frequency", MAC_CLOCK);
qdev_prop_set_uint32(dev, "it_shift", 1);
qdev_prop_set_bit(dev, "bit_swap", true);
qdev_prop_set_chr(dev, "chrA", serial_hd(0));
qdev_prop_set_chr(dev, "chrB", serial_hd(1));
qdev_prop_set_uint32(dev, "chnBtype", 0);
qdev_prop_set_uint32(dev, "chnAtype", 0);
qdev_init_nofail(dev);
sysbus = SYS_BUS_DEVICE(dev);
sysbus_connect_irq(sysbus, 0, pic[3]);
sysbus_connect_irq(sysbus, 1, pic[3]);
sysbus_mmio_map(sysbus, 0, SCC_BASE);
/* SCSI */
dev = qdev_create(NULL, TYPE_ESP);
sysbus_esp = ESP_STATE(dev);
esp = &sysbus_esp->esp;
esp->dma_memory_read = NULL;
esp->dma_memory_write = NULL;
esp->dma_opaque = NULL;
sysbus_esp->it_shift = 4;
esp->dma_enabled = 1;
qdev_init_nofail(dev);
sysbus = SYS_BUS_DEVICE(dev);
sysbus_connect_irq(sysbus, 0, qdev_get_gpio_in_named(via_dev,
"via2-irq",
VIA2_IRQ_SCSI_BIT));
sysbus_connect_irq(sysbus, 1,
qdev_get_gpio_in_named(via_dev, "via2-irq",
VIA2_IRQ_SCSI_DATA_BIT));
sysbus_mmio_map(sysbus, 0, ESP_BASE);
sysbus_mmio_map(sysbus, 1, ESP_PDMA);
scsi_bus_legacy_handle_cmdline(&esp->bus);
/* SWIM floppy controller */
dev = qdev_create(NULL, TYPE_SWIM);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, SWIM_BASE);
/* NuBus */
dev = qdev_create(NULL, TYPE_MAC_NUBUS_BRIDGE);
qdev_init_nofail(dev);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, NUBUS_SUPER_SLOT_BASE);
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, NUBUS_SLOT_BASE);
nubus = MAC_NUBUS_BRIDGE(dev)->bus;
/* framebuffer in nubus slot #9 */
dev = qdev_create(BUS(nubus), TYPE_NUBUS_MACFB);
qdev_prop_set_uint32(dev, "width", graphic_width);
qdev_prop_set_uint32(dev, "height", graphic_height);
qdev_prop_set_uint8(dev, "depth", graphic_depth);
qdev_init_nofail(dev);
cs = CPU(cpu);
if (linux_boot) {
uint64_t high;
kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
&elf_entry, NULL, &high, 1,
EM_68K, 0, 0);
if (kernel_size < 0) {
error_report("could not load kernel '%s'", kernel_filename);
exit(1);
}
stl_phys(cs->as, 4, elf_entry); /* reset initial PC */
parameters_base = (high + 1) & ~1;
BOOTINFO1(cs->as, parameters_base, BI_MACHTYPE, MACH_MAC);
BOOTINFO1(cs->as, parameters_base, BI_FPUTYPE, Q800_FPU_ID);
BOOTINFO1(cs->as, parameters_base, BI_MMUTYPE, Q800_MMU_ID);
BOOTINFO1(cs->as, parameters_base, BI_CPUTYPE, Q800_CPU_ID);
BOOTINFO1(cs->as, parameters_base, BI_MAC_CPUID, Q800_MAC_CPU_ID);
BOOTINFO1(cs->as, parameters_base, BI_MAC_MODEL, Q800_MACHINE_ID);
BOOTINFO1(cs->as, parameters_base,
BI_MAC_MEMSIZE, ram_size >> 20); /* in MB */
BOOTINFO2(cs->as, parameters_base, BI_MEMCHUNK, 0, ram_size);
BOOTINFO1(cs->as, parameters_base, BI_MAC_VADDR, VIDEO_BASE);
BOOTINFO1(cs->as, parameters_base, BI_MAC_VDEPTH, graphic_depth);
BOOTINFO1(cs->as, parameters_base, BI_MAC_VDIM,
(graphic_height << 16) | graphic_width);
BOOTINFO1(cs->as, parameters_base, BI_MAC_VROW,
(graphic_width * graphic_depth + 7) / 8);
BOOTINFO1(cs->as, parameters_base, BI_MAC_SCCBASE, SCC_BASE);
rom = g_malloc(sizeof(*rom));
memory_region_init_ram_ptr(rom, NULL, "m68k_fake_mac.rom",
sizeof(fake_mac_rom), fake_mac_rom);
memory_region_set_readonly(rom, true);
memory_region_add_subregion(get_system_memory(), MACROM_ADDR, rom);
if (kernel_cmdline) {
BOOTINFOSTR(cs->as, parameters_base, BI_COMMAND_LINE,
kernel_cmdline);
}
/* load initrd */
if (initrd_filename) {
initrd_size = get_image_size(initrd_filename);
if (initrd_size < 0) {
error_report("could not load initial ram disk '%s'",
initrd_filename);
exit(1);
}
initrd_base = (ram_size - initrd_size) & TARGET_PAGE_MASK;
load_image_targphys(initrd_filename, initrd_base,
ram_size - initrd_base);
BOOTINFO2(cs->as, parameters_base, BI_RAMDISK, initrd_base,
initrd_size);
} else {
initrd_base = 0;
initrd_size = 0;
}
BOOTINFO0(cs->as, parameters_base, BI_LAST);
} else {
uint8_t *ptr;
/* allocate and load BIOS */
rom = g_malloc(sizeof(*rom));
memory_region_init_ram(rom, NULL, "m68k_mac.rom", MACROM_SIZE,
&error_abort);
if (bios_name == NULL) {
bios_name = MACROM_FILENAME;
}
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
memory_region_set_readonly(rom, true);
memory_region_add_subregion(get_system_memory(), MACROM_ADDR, rom);
/* Load MacROM binary */
if (filename) {
bios_size = load_image_targphys(filename, MACROM_ADDR, MACROM_SIZE);
g_free(filename);
} else {
bios_size = -1;
}
/* Remove qtest_enabled() check once firmware files are in the tree */
if (!qtest_enabled()) {
if (bios_size < 0 || bios_size > MACROM_SIZE) {
error_report("could not load MacROM '%s'", bios_name);
exit(1);
}
ptr = rom_ptr(MACROM_ADDR, MACROM_SIZE);
stl_phys(cs->as, 0, ldl_p(ptr)); /* reset initial SP */
stl_phys(cs->as, 4,
MACROM_ADDR + ldl_p(ptr + 4)); /* reset initial PC */
}
}
}
static void q800_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "Macintosh Quadra 800";
mc->init = q800_init;
mc->default_cpu_type = M68K_CPU_TYPE_NAME("m68040");
mc->max_cpus = 1;
mc->is_default = 0;
mc->block_default_type = IF_SCSI;
}
static const TypeInfo q800_machine_typeinfo = {
.name = MACHINE_TYPE_NAME("q800"),
.parent = TYPE_MACHINE,
.class_init = q800_machine_class_init,
};
static void q800_machine_register_types(void)
{
type_register_static(&q800_machine_typeinfo);
}
type_init(q800_machine_register_types)
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