hw/hppa/machine.c - qemu - Git at Google

 /*
  * QEMU HPPA hardware system emulator.
  * Copyright 2018 Helge Deller <deller@gmx.de>
  */

 #include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "cpu.h"
 #include "hw/hw.h"
 #include "elf.h"
 #include "hw/loader.h"
 #include "hw/boards.h"
 #include "qemu/error-report.h"
 #include "sysemu/sysemu.h"
 #include "hw/timer/mc146818rtc.h"
 #include "hw/ide.h"
 #include "hw/timer/i8254.h"
 #include "hw/char/serial.h"
 #include "hw/hppa/hppa_sys.h"
 #include "qemu/cutils.h"
 #include "qapi/error.h"
 #include "qemu/log.h"

 #define MAX_IDE_BUS 2

 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 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;
     PCIBus *pci_bus;
     ISABus *isa_bus;
     qemu_irq rtc_irq, serial_irq;
     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 *ram_region;
     MemoryRegion *cpu_region;
     long i;

     ram_size = machine->ram_size;

     /* Create CPUs.  */
     for (i = 0; i < smp_cpus; 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], g_strdup_printf("cpu%ld-io-eir", i), 4);
         memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
                                     cpu_region);
     }

     /* Limit main memory. */
     if (ram_size > FIRMWARE_START) {
         machine->ram_size = ram_size = FIRMWARE_START;
     }

     /* Main memory region. */
     ram_region = g_new(MemoryRegion, 1);
     memory_region_allocate_system_memory(ram_region, OBJECT(machine),
                                          "ram", ram_size);
     memory_region_add_subregion(addr_space, 0, ram_region);

     /* Init Dino (PCI host bus chip).  */
     pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
     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, rtc_irq);

     /* Serial code setup.  */
     if (serial_hds[0]) {
         uint32_t addr = DINO_UART_HPA + 0x800;
         serial_mm_init(addr_space, addr, 0, serial_irq,
                        115200, serial_hds[0], DEVICE_BIG_ENDIAN);
     }

     /* SCSI disk setup. */
     lsi53c895a_create(pci_bus);

     /* Network setup.  e1000 is good enough, failing Tulip support.  */
     for (i = 0; i < nb_nics; i++) {
         pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
     }

     /* 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,
                                        bios_name ? bios_name :
                                        "hppa-firmware.img");
     if (firmware_filename == NULL) {
         error_report("no firmware provided");
         exit(1);
     }

     size = load_elf(firmware_filename, NULL,
                     NULL, &firmware_entry, &firmware_low, &firmware_high,
                     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 < ram_size || 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_allocate_system_memory(rom_region, OBJECT(machine),
                                          "firmware",
                                          (FIRMWARE_END - FIRMWARE_START));
     memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);

     /* Load kernel */
     if (kernel_filename) {
         size = load_elf(kernel_filename, &cpu_hppa_to_phys,
                         NULL, &kernel_entry, &kernel_low, &kernel_high,
                         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 %ld kB.\n",
                       kernel_low, kernel_high, kernel_entry, size / 1024);

         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;
             long 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(ram_size, 1024 * 1024 * 1024);
             initrd_base = initrd_base - 64 * 1024;
             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 = boot_menu ? 1 : 0;
         cpu[0]->env.gr[24] = machine->boot_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] = 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;
 }

 static void hppa_machine_reset(void)
 {
     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] == ram_size) {
         return;
     }

     cpu[0]->env.gr[26] = 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;
 }


 static void machine_hppa_machine_init(MachineClass *mc)
 {
     mc->desc = "HPPA generic 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 = 1;
     mc->default_ram_size = 512 * M_BYTE;
     mc->default_boot_order = "cd";
 }

 DEFINE_MACHINE("hppa", machine_hppa_machine_init)
	/*
	* QEMU HPPA hardware system emulator.
	* Copyright 2018 Helge Deller <deller@gmx.de>
	*/

	#include "qemu/osdep.h"
	#include "qemu-common.h"
	#include "cpu.h"
	#include "hw/hw.h"
	#include "elf.h"
	#include "hw/loader.h"
	#include "hw/boards.h"
	#include "qemu/error-report.h"
	#include "sysemu/sysemu.h"
	#include "hw/timer/mc146818rtc.h"
	#include "hw/ide.h"
	#include "hw/timer/i8254.h"
	#include "hw/char/serial.h"
	#include "hw/hppa/hppa_sys.h"
	#include "qemu/cutils.h"
	#include "qapi/error.h"
	#include "qemu/log.h"

	#define MAX_IDE_BUS 2

	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 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;
	PCIBus *pci_bus;
	ISABus *isa_bus;
	qemu_irq rtc_irq, serial_irq;
	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 *ram_region;
	MemoryRegion *cpu_region;
	long i;

	ram_size = machine->ram_size;

	/* Create CPUs. */
	for (i = 0; i < smp_cpus; 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], g_strdup_printf("cpu%ld-io-eir", i), 4);
	memory_region_add_subregion(addr_space, CPU_HPA + i * 0x1000,
	cpu_region);
	}

	/* Limit main memory. */
	if (ram_size > FIRMWARE_START) {
	machine->ram_size = ram_size = FIRMWARE_START;
	}

	/* Main memory region. */
	ram_region = g_new(MemoryRegion, 1);
	memory_region_allocate_system_memory(ram_region, OBJECT(machine),
	"ram", ram_size);
	memory_region_add_subregion(addr_space, 0, ram_region);

	/* Init Dino (PCI host bus chip). */
	pci_bus = dino_init(addr_space, &rtc_irq, &serial_irq);
	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, rtc_irq);

	/* Serial code setup. */
	if (serial_hds[0]) {
	uint32_t addr = DINO_UART_HPA + 0x800;
	serial_mm_init(addr_space, addr, 0, serial_irq,
	115200, serial_hds[0], DEVICE_BIG_ENDIAN);
	}

	/* SCSI disk setup. */
	lsi53c895a_create(pci_bus);

	/* Network setup. e1000 is good enough, failing Tulip support. */
	for (i = 0; i < nb_nics; i++) {
	pci_nic_init_nofail(&nd_table[i], pci_bus, "e1000", NULL);
	}

	/* 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,
	bios_name ? bios_name :
	"hppa-firmware.img");
	if (firmware_filename == NULL) {
	error_report("no firmware provided");
	exit(1);
	}

	size = load_elf(firmware_filename, NULL,
	NULL, &firmware_entry, &firmware_low, &firmware_high,
	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 < ram_size \|\| 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_allocate_system_memory(rom_region, OBJECT(machine),
	"firmware",
	(FIRMWARE_END - FIRMWARE_START));
	memory_region_add_subregion(addr_space, FIRMWARE_START, rom_region);

	/* Load kernel */
	if (kernel_filename) {
	size = load_elf(kernel_filename, &cpu_hppa_to_phys,
	NULL, &kernel_entry, &kernel_low, &kernel_high,
	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 %ld kB.\n",
	kernel_low, kernel_high, kernel_entry, size / 1024);

	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;
	long 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(ram_size, 1024 * 1024 * 1024);
	initrd_base = initrd_base - 64 * 1024;
	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 = boot_menu ? 1 : 0;
	cpu[0]->env.gr[24] = machine->boot_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] = 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;
	}

	static void hppa_machine_reset(void)
	{
	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] == ram_size) {
	return;
	}

	cpu[0]->env.gr[26] = 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;
	}


	static void machine_hppa_machine_init(MachineClass *mc)
	{
	mc->desc = "HPPA generic 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 = 1;
	mc->default_ram_size = 512 * M_BYTE;
	mc->default_boot_order = "cd";
	}

	DEFINE_MACHINE("hppa", machine_hppa_machine_init)