Archipelago » qemu

/*

 * Qemu PowerPC 440 Bamboo board emulation

 *

 * Copyright 2007 IBM Corporation.

 * Authors:

 *        Jerone Young <jyoung5@us.ibm.com>

 *        Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>

 *        Hollis Blanchard <hollisb@us.ibm.com>

 *

 * This work is licensed under the GNU GPL license version 2 or later.

 *

 */

#include "config.h"

#include "qemu-common.h"

#include "net.h"

#include "hw.h"

#include "pci.h"

#include "boards.h"

#include "kvm.h"

#include "kvm_ppc.h"

#include "device_tree.h"

#include "loader.h"

#include "elf.h"

#include "exec-memory.h"

#include "pc.h"

#include "ppc.h"

#include "ppc405.h"

#include "sysemu.h"

#include "sysbus.h"

#define BINARY_DEVICE_TREE_FILE "bamboo.dtb"

/* from u-boot */

#define KERNEL_ADDR  0x1000000

#define FDT_ADDR     0x1800000

#define RAMDISK_ADDR 0x1900000

#define PPC440EP_PCI_CONFIG     0xeec00000

#define PPC440EP_PCI_INTACK     0xeed00000

#define PPC440EP_PCI_SPECIAL    0xeed00000

#define PPC440EP_PCI_REGS       0xef400000

#define PPC440EP_PCI_IO         0xe8000000

#define PPC440EP_PCI_IOLEN      0x00010000

#define PPC440EP_SDRAM_NR_BANKS 4

static const unsigned int ppc440ep_sdram_bank_sizes[] = {

    256<<20, 128<<20, 64<<20, 32<<20, 16<<20, 8<<20, 0

};

static target_phys_addr_t entry;

static int bamboo_load_device_tree(target_phys_addr_t addr,

                                     uint32_t ramsize,

                                     target_phys_addr_t initrd_base,

                                     target_phys_addr_t initrd_size,

                                     const char *kernel_cmdline)

{

    int ret = -1;

#ifdef CONFIG_FDT

    uint32_t mem_reg_property[] = { 0, 0, ramsize };

    char *filename;

    int fdt_size;

    void *fdt;

    uint32_t tb_freq = 400000000;

    uint32_t clock_freq = 400000000;

    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);

    if (!filename) {

        goto out;

    }

    fdt = load_device_tree(filename, &fdt_size);

    g_free(filename);

    if (fdt == NULL) {

        goto out;

    }

    /* Manipulate device tree in memory. */

    ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,

                               sizeof(mem_reg_property));

    if (ret < 0)

        fprintf(stderr, "couldn't set /memory/reg\n");

    ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",

                                    initrd_base);

    if (ret < 0)

        fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");

    ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",

                                    (initrd_base + initrd_size));

    if (ret < 0)

        fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");

    ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",

                                      kernel_cmdline);

    if (ret < 0)

        fprintf(stderr, "couldn't set /chosen/bootargs\n");

    /* Copy data from the host device tree into the guest. Since the guest can

     * directly access the timebase without host involvement, we must expose

     * the correct frequencies. */

    if (kvm_enabled()) {

        tb_freq = kvmppc_get_tbfreq();

        clock_freq = kvmppc_get_clockfreq();

    }

    qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",

                              clock_freq);

    qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",

                              tb_freq);

    ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);

    g_free(fdt);

out:

#endif

    return ret;

}

/* Create reset TLB entries for BookE, spanning the 32bit addr space.  */

static void mmubooke_create_initial_mapping(CPUState *env,

                                     target_ulong va,

                                     target_phys_addr_t pa)

{

    ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];

    tlb->attr = 0;

    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);

    tlb->size = 1 << 31; /* up to 0x80000000  */

    tlb->EPN = va & TARGET_PAGE_MASK;

    tlb->RPN = pa & TARGET_PAGE_MASK;

    tlb->PID = 0;

    tlb = &env->tlb.tlbe[1];

    tlb->attr = 0;

    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);

    tlb->size = 1 << 31; /* up to 0xffffffff  */

    tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;

    tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;

    tlb->PID = 0;

}

static void main_cpu_reset(void *opaque)

{

    CPUState *env = opaque;

    cpu_reset(env);

    env->gpr[1] = (16<<20) - 8;

    env->gpr[3] = FDT_ADDR;

    env->nip = entry;

    /* Create a mapping for the kernel.  */

    mmubooke_create_initial_mapping(env, 0, 0);

}

static void bamboo_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)

{

    unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };

    MemoryRegion *address_space_mem = get_system_memory();

    MemoryRegion *ram_memories

        = g_malloc(PPC440EP_SDRAM_NR_BANKS * sizeof(*ram_memories));

    target_phys_addr_t ram_bases[PPC440EP_SDRAM_NR_BANKS];

    target_phys_addr_t ram_sizes[PPC440EP_SDRAM_NR_BANKS];

    qemu_irq *pic;

    qemu_irq *irqs;

    PCIBus *pcibus;

    CPUState *env;

    uint64_t elf_entry;

    uint64_t elf_lowaddr;

    target_phys_addr_t loadaddr = 0;

    target_long initrd_size = 0;

    DeviceState *dev;

    int success;

    int i;

    /* Setup CPU. */

    if (cpu_model == NULL) {

        cpu_model = "440EP";

    }

    env = cpu_init(cpu_model);

    if (!env) {

        fprintf(stderr, "Unable to initialize CPU!\n");

        exit(1);

    }

    qemu_register_reset(main_cpu_reset, env);

    ppc_booke_timers_init(env, 400000000, 0);

    ppc_dcr_init(env, NULL, NULL);

    /* interrupt controller */

    irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);

    irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];

    irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];

    pic = ppcuic_init(env, irqs, 0x0C0, 0, 1);

    /* SDRAM controller */

    memset(ram_bases, 0, sizeof(ram_bases));

    memset(ram_sizes, 0, sizeof(ram_sizes));

    ram_size = ppc4xx_sdram_adjust(ram_size, PPC440EP_SDRAM_NR_BANKS,

                                   ram_memories,

                                   ram_bases, ram_sizes,

                                   ppc440ep_sdram_bank_sizes);

    /* XXX 440EP's ECC interrupts are on UIC1, but we've only created UIC0. */

    ppc4xx_sdram_init(env, pic[14], PPC440EP_SDRAM_NR_BANKS, ram_memories,

                      ram_bases, ram_sizes, 1);

    /* PCI */

    dev = sysbus_create_varargs("ppc4xx-pcihost", PPC440EP_PCI_CONFIG,

                                pic[pci_irq_nrs[0]], pic[pci_irq_nrs[1]],

                                pic[pci_irq_nrs[2]], pic[pci_irq_nrs[3]],

                                NULL);

    pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");

    if (!pcibus) {

        fprintf(stderr, "couldn't create PCI controller!\n");

        exit(1);

    }

    isa_mmio_init(PPC440EP_PCI_IO, PPC440EP_PCI_IOLEN);

    if (serial_hds[0] != NULL) {

        serial_mm_init(address_space_mem, 0xef600300, 0, pic[0],

                       PPC_SERIAL_MM_BAUDBASE, serial_hds[0],

                       DEVICE_BIG_ENDIAN);

    }

    if (serial_hds[1] != NULL) {

        serial_mm_init(address_space_mem, 0xef600400, 0, pic[1],

                       PPC_SERIAL_MM_BAUDBASE, serial_hds[1],

                       DEVICE_BIG_ENDIAN);

    }

    if (pcibus) {

        /* Register network interfaces. */

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

            /* There are no PCI NICs on the Bamboo board, but there are

             * PCI slots, so we can pick whatever default model we want. */

            pci_nic_init_nofail(&nd_table[i], "e1000", NULL);

        }

    }

    /* Load kernel. */

    if (kernel_filename) {

        success = load_uimage(kernel_filename, &entry, &loadaddr, NULL);

        if (success < 0) {

            success = load_elf(kernel_filename, NULL, NULL, &elf_entry,

                               &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);

            entry = elf_entry;

            loadaddr = elf_lowaddr;

        }

        /* XXX try again as binary */

        if (success < 0) {

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

                    kernel_filename);

            exit(1);

        }

    }

    /* Load initrd. */

    if (initrd_filename) {

        initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,

                                          ram_size - RAMDISK_ADDR);

        if (initrd_size < 0) {

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

                    initrd_filename, RAMDISK_ADDR);

            exit(1);

        }

    }

    /* If we're loading a kernel directly, we must load the device tree too. */

    if (kernel_filename) {

        if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR,

                                    initrd_size, kernel_cmdline) < 0) {

            fprintf(stderr, "couldn't load device tree\n");

            exit(1);

        }

    }

    if (kvm_enabled())

        kvmppc_init();

}

static QEMUMachine bamboo_machine = {

    .name = "bamboo",

    .desc = "bamboo",

    .init = bamboo_init,

};

static void bamboo_machine_init(void)

{

    qemu_register_machine(&bamboo_machine);

}

machine_init(bamboo_machine_init);