Archipelago » qemu

/*

 * QEMU fulong 2e mini pc support

 *

 * Copyright (c) 2008 yajin (yajin@vm-kernel.org)

 * Copyright (c) 2009 chenming (chenming@rdc.faw.com.cn)

 * Copyright (c) 2010 Huacai Chen (zltjiangshi@gmail.com)

 * This code is licensed under the GNU GPL v2.

 *

 * Contributions after 2012-01-13 are licensed under the terms of the

 * GNU GPL, version 2 or (at your option) any later version.

 */

/*

 * Fulong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)

 * http://www.linux-mips.org/wiki/Fulong

 *

 * Loongson 2e user manual:

 * http://www.loongsondeveloper.com/doc/Loongson2EUserGuide.pdf

 */

#include "hw.h"

#include "pc.h"

#include "fdc.h"

#include "net.h"

#include "boards.h"

#include "smbus.h"

#include "block.h"

#include "flash.h"

#include "mips.h"

#include "mips_cpudevs.h"

#include "pci.h"

#include "qemu-char.h"

#include "sysemu.h"

#include "audio/audio.h"

#include "qemu-log.h"

#include "loader.h"

#include "mips-bios.h"

#include "ide.h"

#include "elf.h"

#include "vt82c686.h"

#include "mc146818rtc.h"

#include "i8254.h"

#include "blockdev.h"

#include "exec-memory.h"

#define DEBUG_FULONG2E_INIT

#define ENVP_ADDR       0x80002000l

#define ENVP_NB_ENTRIES                 16

#define ENVP_ENTRY_SIZE                 256

#define MAX_IDE_BUS 2

/*

 * PMON is not part of qemu and released with BSD license, anyone

 * who want to build a pmon binary please first git-clone the source

 * from the git repository at:

 * http://www.loongson.cn/support/git/pmon

 * Then follow the "Compile Guide" available at:

 * http://dev.lemote.com/code/pmon

 *

 * Notes:

 * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git

 * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"

 * in the "Compile Guide".

 */

#define FULONG_BIOSNAME "pmon_fulong2e.bin"

/* PCI SLOT in fulong 2e */

#define FULONG2E_VIA_SLOT        5

#define FULONG2E_ATI_SLOT        6

#define FULONG2E_RTL8139_SLOT    7

static ISADevice *pit;

static struct _loaderparams {

    int ram_size;

    const char *kernel_filename;

    const char *kernel_cmdline;

    const char *initrd_filename;

} loaderparams;

static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t* prom_buf, int index,

                                        const char *string, ...)

{

    va_list ap;

    int32_t table_addr;

    if (index >= ENVP_NB_ENTRIES)

        return;

    if (string == NULL) {

        prom_buf[index] = 0;

        return;

    }

    table_addr = sizeof(int32_t) * ENVP_NB_ENTRIES + index * ENVP_ENTRY_SIZE;

    prom_buf[index] = tswap32(ENVP_ADDR + table_addr);

    va_start(ap, string);

    vsnprintf((char *)prom_buf + table_addr, ENVP_ENTRY_SIZE, string, ap);

    va_end(ap);

}

static int64_t load_kernel (CPUMIPSState *env)

{

    int64_t kernel_entry, kernel_low, kernel_high;

    int index = 0;

    long initrd_size;

    ram_addr_t initrd_offset;

    uint32_t *prom_buf;

    long prom_size;

    if (load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, NULL,

                 (uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,

                 (uint64_t *)&kernel_high, 0, ELF_MACHINE, 1) < 0) {

        fprintf(stderr, "qemu: could not load kernel '%s'\n",

                loaderparams.kernel_filename);

        exit(1);

    }

    /* load initrd */

    initrd_size = 0;

    initrd_offset = 0;

    if (loaderparams.initrd_filename) {

        initrd_size = get_image_size (loaderparams.initrd_filename);

        if (initrd_size > 0) {

            initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;

            if (initrd_offset + initrd_size > ram_size) {

                fprintf(stderr,

                        "qemu: memory too small for initial ram disk '%s'\n",

                        loaderparams.initrd_filename);

                exit(1);

            }

            initrd_size = load_image_targphys(loaderparams.initrd_filename,

                                     initrd_offset, ram_size - initrd_offset);

        }

        if (initrd_size == (target_ulong) -1) {

            fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",

                    loaderparams.initrd_filename);

            exit(1);

        }

    }

    /* Setup prom parameters. */

    prom_size = ENVP_NB_ENTRIES * (sizeof(int32_t) + ENVP_ENTRY_SIZE);

    prom_buf = g_malloc(prom_size);

    prom_set(prom_buf, index++, "%s", loaderparams.kernel_filename);

    if (initrd_size > 0) {

        prom_set(prom_buf, index++, "rd_start=0x%" PRIx64 " rd_size=%li %s",

                 cpu_mips_phys_to_kseg0(NULL, initrd_offset), initrd_size,

                 loaderparams.kernel_cmdline);

    } else {

        prom_set(prom_buf, index++, "%s", loaderparams.kernel_cmdline);

    }

    /* Setup minimum environment variables */

    prom_set(prom_buf, index++, "busclock=33000000");

    prom_set(prom_buf, index++, "cpuclock=100000000");

    prom_set(prom_buf, index++, "memsize=%i", loaderparams.ram_size/1024/1024);

    prom_set(prom_buf, index++, "modetty0=38400n8r");

    prom_set(prom_buf, index++, NULL);

    rom_add_blob_fixed("prom", prom_buf, prom_size,

                       cpu_mips_kseg0_to_phys(NULL, ENVP_ADDR));

    return kernel_entry;

}

static void write_bootloader (CPUMIPSState *env, uint8_t *base, int64_t kernel_addr)

{

    uint32_t *p;

    /* Small bootloader */

    p = (uint32_t *) base;

    stl_raw(p++, 0x0bf00010);                                      /* j 0x1fc00040 */

    stl_raw(p++, 0x00000000);                                      /* nop */

    /* Second part of the bootloader */

    p = (uint32_t *) (base + 0x040);

    stl_raw(p++, 0x3c040000);                                      /* lui a0, 0 */

    stl_raw(p++, 0x34840002);                                      /* ori a0, a0, 2 */

    stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */

    stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a0, low(ENVP_ADDR) */

    stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */

    stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */

    stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));      /* lui a3, high(env->ram_size) */

    stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));   /* ori a3, a3, low(env->ram_size) */

    stl_raw(p++, 0x3c1f0000 | ((kernel_addr >> 16) & 0xffff));     /* lui ra, high(kernel_addr) */;

    stl_raw(p++, 0x37ff0000 | (kernel_addr & 0xffff));             /* ori ra, ra, low(kernel_addr) */

    stl_raw(p++, 0x03e00008);                                      /* jr ra */

    stl_raw(p++, 0x00000000);                                      /* nop */

}

static void main_cpu_reset(void *opaque)

{

    MIPSCPU *cpu = opaque;

    CPUMIPSState *env = &cpu->env;

    cpu_reset(CPU(cpu));

    /* TODO: 2E reset stuff */

    if (loaderparams.kernel_filename) {

        env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));

    }

}

uint8_t eeprom_spd[0x80] = {

    0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,

    0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,

    0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,

    0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,

    0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

    0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,

    0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,

    0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,

    0x20,0x30,0x20

};

/* Audio support */

static void audio_init (PCIBus *pci_bus)

{

    vt82c686b_ac97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 5));

    vt82c686b_mc97_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 6));

}

/* Network support */

static void network_init (void)

{

    int i;

    for(i = 0; i < nb_nics; i++) {

        NICInfo *nd = &nd_table[i];

        const char *default_devaddr = NULL;

        if (i == 0 && (!nd->model || strcmp(nd->model, "rtl8139") == 0)) {

            /* The fulong board has a RTL8139 card using PCI SLOT 7 */

            default_devaddr = "07";

        }

        pci_nic_init_nofail(nd, "rtl8139", default_devaddr);

    }

}

static void cpu_request_exit(void *opaque, int irq, int level)

{

    CPUMIPSState *env = cpu_single_env;

    if (env && level) {

        cpu_exit(env);

    }

}

static void mips_fulong2e_init(ram_addr_t ram_size, const char *boot_device,

                        const char *kernel_filename, const char *kernel_cmdline,

                        const char *initrd_filename, const char *cpu_model)

{

    char *filename;

    MemoryRegion *address_space_mem = get_system_memory();

    MemoryRegion *ram = g_new(MemoryRegion, 1);

    MemoryRegion *bios = g_new(MemoryRegion, 1);

    long bios_size;

    int64_t kernel_entry;

    qemu_irq *i8259;

    qemu_irq *cpu_exit_irq;

    PCIBus *pci_bus;

    ISABus *isa_bus;

    i2c_bus *smbus;

    int i;

    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];

    MIPSCPU *cpu;

    CPUMIPSState *env;

    /* init CPUs */

    if (cpu_model == NULL) {

        cpu_model = "Loongson-2E";

    }

    cpu = cpu_mips_init(cpu_model);

    if (cpu == NULL) {

        fprintf(stderr, "Unable to find CPU definition\n");

        exit(1);

    }

    env = &cpu->env;

    qemu_register_reset(main_cpu_reset, cpu);

    /* fulong 2e has 256M ram. */

    ram_size = 256 * 1024 * 1024;

    /* fulong 2e has a 1M flash.Winbond W39L040AP70Z */

    bios_size = 1024 * 1024;

    /* allocate RAM */

    memory_region_init_ram(ram, "fulong2e.ram", ram_size);

    vmstate_register_ram_global(ram);

    memory_region_init_ram(bios, "fulong2e.bios", bios_size);

    vmstate_register_ram_global(bios);

    memory_region_set_readonly(bios, true);

    memory_region_add_subregion(address_space_mem, 0, ram);

    memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios);

    /* We do not support flash operation, just loading pmon.bin as raw BIOS.

     * Please use -L to set the BIOS path and -bios to set bios name. */

    if (kernel_filename) {

        loaderparams.ram_size = ram_size;

        loaderparams.kernel_filename = kernel_filename;

        loaderparams.kernel_cmdline = kernel_cmdline;

        loaderparams.initrd_filename = initrd_filename;

        kernel_entry = load_kernel (env);

        write_bootloader(env, memory_region_get_ram_ptr(bios), kernel_entry);

    } else {

        if (bios_name == NULL) {

                bios_name = FULONG_BIOSNAME;

        }

        filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

        if (filename) {

            bios_size = load_image_targphys(filename, 0x1fc00000LL,

                                            BIOS_SIZE);

            g_free(filename);

        } else {

            bios_size = -1;

        }

        if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {

            fprintf(stderr, "qemu: Could not load MIPS bios '%s'\n", bios_name);

            exit(1);

        }

    }

    /* Init internal devices */

    cpu_mips_irq_init_cpu(env);

    cpu_mips_clock_init(env);

    /* North bridge, Bonito --> IP2 */

    pci_bus = bonito_init((qemu_irq *)&(env->irq[2]));

    /* South bridge */

    ide_drive_get(hd, MAX_IDE_BUS);

    isa_bus = vt82c686b_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 0));

    if (!isa_bus) {

        fprintf(stderr, "vt82c686b_init error\n");

        exit(1);

    }

    /* Interrupt controller */

    /* The 8259 -> IP5  */

    i8259 = i8259_init(isa_bus, env->irq[5]);

    isa_bus_irqs(isa_bus, i8259);

    vt82c686b_ide_init(pci_bus, hd, PCI_DEVFN(FULONG2E_VIA_SLOT, 1));

    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 2),

                      "vt82c686b-usb-uhci");

    pci_create_simple(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 3),

                      "vt82c686b-usb-uhci");

    smbus = vt82c686b_pm_init(pci_bus, PCI_DEVFN(FULONG2E_VIA_SLOT, 4),

                              0xeee1, NULL);

    /* TODO: Populate SPD eeprom data.  */

    smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));

    /* init other devices */

    pit = pit_init(isa_bus, 0x40, 0, NULL);

    cpu_exit_irq = qemu_allocate_irqs(cpu_request_exit, NULL, 1);

    DMA_init(0, cpu_exit_irq);

    /* Super I/O */

    isa_create_simple(isa_bus, "i8042");

    rtc_init(isa_bus, 2000, NULL);

    for(i = 0; i < MAX_SERIAL_PORTS; i++) {

        if (serial_hds[i]) {

            serial_isa_init(isa_bus, i, serial_hds[i]);

        }

    }

    if (parallel_hds[0]) {

        parallel_init(isa_bus, 0, parallel_hds[0]);

    }

    /* Sound card */

    audio_init(pci_bus);

    /* Network card */

    network_init();

}

QEMUMachine mips_fulong2e_machine = {

    .name = "fulong2e",

    .desc = "Fulong 2e mini pc",

    .init = mips_fulong2e_init,

};

static void mips_fulong2e_machine_init(void)

{

    qemu_register_machine(&mips_fulong2e_machine);

}

machine_init(mips_fulong2e_machine_init);