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qemu-e2k/hw/hppa/machine.c
Helge Deller 5079892df5 hppa: Fix serial port assignments and pass-through 
This fixes the serial ports in the emulation to behave as on original
hardware.

On the real hardware, the LASI UART is serial port #0 and the DINO UART
is serial port #1. This is fixed in SeaBIOS-hppa firmware v6, which is
why at least this firmware version is required.

The serial port addresses in hppa/hppa_hardware.h have to be swapped,
and when creating the virtual serial ports the correct port addresses
are used.

This patch now for example allows to specify on the qemu command line:
     -serial mon:stdio -serial /dev/ttyS4
to use the emulated ttyS0 in the guest for console output, and pass
ttyS4 from the host to ttyS1 in the guest.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
2022-05-28 12:25:42 +02:00

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/*
* QEMU HPPA hardware system emulator.
* Copyright 2018 Helge Deller <deller@gmx.de>
*/
#include "qemu/osdep.h"
#include "qemu/datadir.h"
#include "cpu.h"
#include "elf.h"
#include "hw/loader.h"
#include "qemu/error-report.h"
#include "sysemu/reset.h"
#include "sysemu/sysemu.h"
#include "sysemu/runstate.h"
#include "hw/rtc/mc146818rtc.h"
#include "hw/timer/i8254.h"
#include "hw/char/serial.h"
#include "hw/char/parallel.h"
#include "hw/intc/i8259.h"
#include "hw/input/lasips2.h"
#include "hw/net/lasi_82596.h"
#include "hw/nmi.h"
#include "hw/pci/pci.h"
#include "hw/pci-host/dino.h"
#include "hw/misc/lasi.h"
#include "hppa_hardware.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "net/net.h"
#include "qemu/log.h"
#include "net/net.h"
#define MAX_IDE_BUS 2
#define MIN_SEABIOS_HPPA_VERSION 6 /* require at least this fw version */
#define HPA_POWER_BUTTON (FIRMWARE_END - 0x10)
#define enable_lasi_lan() 0
static void hppa_powerdown_req(Notifier *n, void *opaque)
{
hwaddr soft_power_reg = HPA_POWER_BUTTON;
uint32_t val;
val = ldl_be_phys(&address_space_memory, soft_power_reg);
if ((val >> 8) == 0) {
/* immediately shut down when under hardware control */
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
return;
}
/* clear bit 31 to indicate that the power switch was pressed. */
val &= ~1;
stl_be_phys(&address_space_memory, soft_power_reg, val);
}
static Notifier hppa_system_powerdown_notifier = {
.notify = hppa_powerdown_req
};
/* Fallback for unassigned PCI I/O operations. Avoids MCHK. */
static uint64_t ignore_read(void *opaque, hwaddr addr, unsigned size)
{
return 0;
}
static void ignore_write(void *opaque, hwaddr addr, uint64_t v, unsigned size)
{
}
static const MemoryRegionOps hppa_pci_ignore_ops = {
.read = ignore_read,
.write = ignore_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 8,
},
.impl = {
.min_access_size = 1,
.max_access_size = 8,
},
};
static ISABus *hppa_isa_bus(void)
{
ISABus *isa_bus;
qemu_irq *isa_irqs;
MemoryRegion *isa_region;
isa_region = g_new(MemoryRegion, 1);
memory_region_init_io(isa_region, NULL, &hppa_pci_ignore_ops,
NULL, "isa-io", 0x800);
memory_region_add_subregion(get_system_memory(), IDE_HPA,
isa_region);
isa_bus = isa_bus_new(NULL, get_system_memory(), isa_region,
&error_abort);
isa_irqs = i8259_init(isa_bus,
/* qemu_allocate_irq(dino_set_isa_irq, s, 0)); */
NULL);
isa_bus_irqs(isa_bus, isa_irqs);
return isa_bus;
}
static uint64_t cpu_hppa_to_phys(void *opaque, uint64_t addr)
{
addr &= (0x10000000 - 1);
return addr;
}
static HPPACPU *cpu[HPPA_MAX_CPUS];
static uint64_t firmware_entry;
static void fw_cfg_boot_set(void *opaque, const char *boot_device,
Error **errp)
{
fw_cfg_modify_i16(opaque, FW_CFG_BOOT_DEVICE, boot_device[0]);
}
static FWCfgState *create_fw_cfg(MachineState *ms)
{
FWCfgState *fw_cfg;
uint64_t val;
fw_cfg = fw_cfg_init_mem(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4);
fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, ms->smp.cpus);
fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, HPPA_MAX_CPUS);
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, ms->ram_size);
val = cpu_to_le64(MIN_SEABIOS_HPPA_VERSION);
fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version",
g_memdup(&val, sizeof(val)), sizeof(val));
val = cpu_to_le64(HPPA_TLB_ENTRIES);
fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries",
g_memdup(&val, sizeof(val)), sizeof(val));
val = cpu_to_le64(HPPA_BTLB_ENTRIES);
fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries",
g_memdup(&val, sizeof(val)), sizeof(val));
val = cpu_to_le64(HPA_POWER_BUTTON);
fw_cfg_add_file(fw_cfg, "/etc/power-button-addr",
g_memdup(&val, sizeof(val)), sizeof(val));
fw_cfg_add_i16(fw_cfg, FW_CFG_BOOT_DEVICE, ms->boot_config.order[0]);
qemu_register_boot_set(fw_cfg_boot_set, fw_cfg);
return fw_cfg;
}
static LasiState *lasi_init(void)
{
DeviceState *dev;
dev = qdev_new(TYPE_LASI_CHIP);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
return LASI_CHIP(dev);
}
static DinoState *dino_init(MemoryRegion *addr_space)
{
DeviceState *dev;
dev = qdev_new(TYPE_DINO_PCI_HOST_BRIDGE);
object_property_set_link(OBJECT(dev), "memory-as", OBJECT(addr_space),
&error_fatal);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
return DINO_PCI_HOST_BRIDGE(dev);
}
static void machine_hppa_init(MachineState *machine)
{
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
DeviceState *dev, *dino_dev, *lasi_dev;
PCIBus *pci_bus;
ISABus *isa_bus;
char *firmware_filename;
uint64_t firmware_low, firmware_high;
long size;
uint64_t kernel_entry = 0, kernel_low, kernel_high;
MemoryRegion *addr_space = get_system_memory();
MemoryRegion *rom_region;
MemoryRegion *cpu_region;
long i;
unsigned int smp_cpus = machine->smp.cpus;
SysBusDevice *s;
/* Create CPUs. */
for (i = 0; i < smp_cpus; i++) {
char *name = g_strdup_printf("cpu%ld-io-eir", i);
cpu[i] = HPPA_CPU(cpu_create(machine->cpu_type));
cpu_region = g_new(MemoryRegion, 1);
memory_region_init_io(cpu_region, OBJECT(cpu[i]), &hppa_io_eir_ops,
cpu[i], name, 4);
memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
cpu_region);
g_free(name);
}
/* Main memory region. */
if (machine->ram_size > 3 * GiB) {
error_report("RAM size is currently restricted to 3GB");
exit(EXIT_FAILURE);
}
memory_region_add_subregion_overlap(addr_space, 0, machine->ram, -1);
/* Init Lasi chip */
lasi_dev = DEVICE(lasi_init());
memory_region_add_subregion(addr_space, LASI_HPA,
sysbus_mmio_get_region(
SYS_BUS_DEVICE(lasi_dev), 0));
/* Init Dino (PCI host bus chip). */
dino_dev = DEVICE(dino_init(addr_space));
memory_region_add_subregion(addr_space, DINO_HPA,
sysbus_mmio_get_region(
SYS_BUS_DEVICE(dino_dev), 0));
pci_bus = PCI_BUS(qdev_get_child_bus(dino_dev, "pci"));
assert(pci_bus);
/* Create ISA bus. */
isa_bus = hppa_isa_bus();
assert(isa_bus);
/* Realtime clock, used by firmware for PDC_TOD call. */
mc146818_rtc_init(isa_bus, 2000, NULL);
/* Serial ports: Lasi and Dino use a 7.272727 MHz clock. */
serial_mm_init(addr_space, LASI_UART_HPA + 0x800, 0,
qdev_get_gpio_in(lasi_dev, LASI_IRQ_UART_HPA), 7272727 / 16,
serial_hd(0), DEVICE_BIG_ENDIAN);
serial_mm_init(addr_space, DINO_UART_HPA + 0x800, 0,
qdev_get_gpio_in(dino_dev, DINO_IRQ_RS232INT), 7272727 / 16,
serial_hd(1), DEVICE_BIG_ENDIAN);
/* Parallel port */
parallel_mm_init(addr_space, LASI_LPT_HPA + 0x800, 0,
qdev_get_gpio_in(lasi_dev, LASI_IRQ_LAN_HPA),
parallel_hds[0]);
/* fw_cfg configuration interface */
create_fw_cfg(machine);
/* SCSI disk setup. */
dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
lsi53c8xx_handle_legacy_cmdline(dev);
/* Graphics setup. */
if (machine->enable_graphics && vga_interface_type != VGA_NONE) {
vga_interface_created = true;
dev = qdev_new("artist");
s = SYS_BUS_DEVICE(dev);
sysbus_realize_and_unref(s, &error_fatal);
sysbus_mmio_map(s, 0, LASI_GFX_HPA);
sysbus_mmio_map(s, 1, ARTIST_FB_ADDR);
}
/* Network setup. */
if (enable_lasi_lan()) {
lasi_82596_init(addr_space, LASI_LAN_HPA,
qdev_get_gpio_in(lasi_dev, LASI_IRQ_LAN_HPA));
}
for (i = 0; i < nb_nics; i++) {
if (!enable_lasi_lan()) {
pci_nic_init_nofail(&nd_table[i], pci_bus, "tulip", NULL);
}
}
/* PS/2 Keyboard/Mouse */
lasips2_init(addr_space, LASI_PS2KBD_HPA,
qdev_get_gpio_in(lasi_dev, LASI_IRQ_PS2KBD_HPA));
/* register power switch emulation */
qemu_register_powerdown_notifier(&hppa_system_powerdown_notifier);
/* Load firmware. Given that this is not "real" firmware,
but one explicitly written for the emulation, we might as
well load it directly from an ELF image. */
firmware_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS,
machine->firmware ?: "hppa-firmware.img");
if (firmware_filename == NULL) {
error_report("no firmware provided");
exit(1);
}
size = load_elf(firmware_filename, NULL, NULL, NULL,
&firmware_entry, &firmware_low, &firmware_high, NULL,
true, EM_PARISC, 0, 0);
/* Unfortunately, load_elf sign-extends reading elf32. */
firmware_entry = (target_ureg)firmware_entry;
firmware_low = (target_ureg)firmware_low;
firmware_high = (target_ureg)firmware_high;
if (size < 0) {
error_report("could not load firmware '%s'", firmware_filename);
exit(1);
}
qemu_log_mask(CPU_LOG_PAGE, "Firmware loaded at 0x%08" PRIx64
"-0x%08" PRIx64 ", entry at 0x%08" PRIx64 ".\n",
firmware_low, firmware_high, firmware_entry);
if (firmware_low < FIRMWARE_START || firmware_high >= FIRMWARE_END) {
error_report("Firmware overlaps with memory or IO space");
exit(1);
}
g_free(firmware_filename);
rom_region = g_new(MemoryRegion, 1);
memory_region_init_ram(rom_region, NULL, "firmware",
(FIRMWARE_END - FIRMWARE_START), &error_fatal);
memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);
/* Load kernel */
if (kernel_filename) {
size = load_elf(kernel_filename, NULL, &cpu_hppa_to_phys,
NULL, &kernel_entry, &kernel_low, &kernel_high, NULL,
true, EM_PARISC, 0, 0);
/* Unfortunately, load_elf sign-extends reading elf32. */
kernel_entry = (target_ureg) cpu_hppa_to_phys(NULL, kernel_entry);
kernel_low = (target_ureg)kernel_low;
kernel_high = (target_ureg)kernel_high;
if (size < 0) {
error_report("could not load kernel '%s'", kernel_filename);
exit(1);
}
qemu_log_mask(CPU_LOG_PAGE, "Kernel loaded at 0x%08" PRIx64
"-0x%08" PRIx64 ", entry at 0x%08" PRIx64
", size %" PRIu64 " kB\n",
kernel_low, kernel_high, kernel_entry, size / KiB);
if (kernel_cmdline) {
cpu[0]->env.gr[24] = 0x4000;
pstrcpy_targphys("cmdline", cpu[0]->env.gr[24],
TARGET_PAGE_SIZE, kernel_cmdline);
}
if (initrd_filename) {
ram_addr_t initrd_base;
int64_t initrd_size;
initrd_size = get_image_size(initrd_filename);
if (initrd_size < 0) {
error_report("could not load initial ram disk '%s'",
initrd_filename);
exit(1);
}
/* Load the initrd image high in memory.
Mirror the algorithm used by palo:
(1) Due to sign-extension problems and PDC,
put the initrd no higher than 1G.
(2) Reserve 64k for stack. */
initrd_base = MIN(machine->ram_size, 1 * GiB);
initrd_base = initrd_base - 64 * KiB;
initrd_base = (initrd_base - initrd_size) & TARGET_PAGE_MASK;
if (initrd_base < kernel_high) {
error_report("kernel and initial ram disk too large!");
exit(1);
}
load_image_targphys(initrd_filename, initrd_base, initrd_size);
cpu[0]->env.gr[23] = initrd_base;
cpu[0]->env.gr[22] = initrd_base + initrd_size;
}
}
if (!kernel_entry) {
/* When booting via firmware, tell firmware if we want interactive
* mode (kernel_entry=1), and to boot from CD (gr[24]='d')
* or hard disc * (gr[24]='c').
*/
kernel_entry = machine->boot_config.has_menu ? machine->boot_config.menu : 0;
cpu[0]->env.gr[24] = machine->boot_config.order[0];
}
/* We jump to the firmware entry routine and pass the
* various parameters in registers. After firmware initialization,
* firmware will start the Linux kernel with ramdisk and cmdline.
*/
cpu[0]->env.gr[26] = machine->ram_size;
cpu[0]->env.gr[25] = kernel_entry;
/* tell firmware how many SMP CPUs to present in inventory table */
cpu[0]->env.gr[21] = smp_cpus;
/* tell firmware fw_cfg port */
cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
}
static void hppa_machine_reset(MachineState *ms)
{
unsigned int smp_cpus = ms->smp.cpus;
int i;
qemu_devices_reset();
/* Start all CPUs at the firmware entry point.
* Monarch CPU will initialize firmware, secondary CPUs
* will enter a small idle look and wait for rendevouz. */
for (i = 0; i < smp_cpus; i++) {
cpu_set_pc(CPU(cpu[i]), firmware_entry);
cpu[i]->env.gr[5] = CPU_HPA + i * 0x1000;
}
/* already initialized by machine_hppa_init()? */
if (cpu[0]->env.gr[26] == ms->ram_size) {
return;
}
cpu[0]->env.gr[26] = ms->ram_size;
cpu[0]->env.gr[25] = 0; /* no firmware boot menu */
cpu[0]->env.gr[24] = 'c';
/* gr22/gr23 unused, no initrd while reboot. */
cpu[0]->env.gr[21] = smp_cpus;
/* tell firmware fw_cfg port */
cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
}
static void hppa_nmi(NMIState *n, int cpu_index, Error **errp)
{
CPUState *cs;
CPU_FOREACH(cs) {
cpu_interrupt(cs, CPU_INTERRUPT_NMI);
}
}
static void hppa_machine_init_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
NMIClass *nc = NMI_CLASS(oc);
mc->desc = "HPPA B160L machine";
mc->default_cpu_type = TYPE_HPPA_CPU;
mc->init = machine_hppa_init;
mc->reset = hppa_machine_reset;
mc->block_default_type = IF_SCSI;
mc->max_cpus = HPPA_MAX_CPUS;
mc->default_cpus = 1;
mc->is_default = true;
mc->default_ram_size = 512 * MiB;
mc->default_boot_order = "cd";
mc->default_ram_id = "ram";
nc->nmi_monitor_handler = hppa_nmi;
}
static const TypeInfo hppa_machine_init_typeinfo = {
.name = MACHINE_TYPE_NAME("hppa"),
.parent = TYPE_MACHINE,
.class_init = hppa_machine_init_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_NMI },
{ }
},
};
static void hppa_machine_init_register_types(void)
{
type_register_static(&hppa_machine_init_typeinfo);
}
type_init(hppa_machine_init_register_types)
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