/*
 * QEMU OldWorld PowerMac (currently ~G3 B&W) hardware System Emulator
 *
 * Copyright (c) 2004-2007 Fabrice Bellard
 * Copyright (c) 2007 Jocelyn Mayer
 *
 * 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 "hw.h"
#include "ppc.h"
#include "ppc_mac.h"
#include "nvram.h"
#include "pc.h"
#include "sysemu.h"
#include "net.h"
#include "isa.h"
#include "pci.h"
#include "boards.h"

#define MAX_IDE_BUS 2
#define VGA_BIOS_SIZE 65536

/* temporary frame buffer OSI calls for the video.x driver. The right
   solution is to modify the driver to use VGA PCI I/Os */
/* XXX: to be removed. This is no way related to emulation */
static int vga_osi_call (CPUState *env)
{
    static int vga_vbl_enabled;
    int linesize;

    //    printf("osi_call R5=" REGX "\n", ppc_dump_gpr(env, 5));

    /* same handler as PearPC, coming from the original MOL video
       driver. */
    switch(env->gpr[5]) {
    case 4:
        break;
    case 28: /* set_vmode */
        if (env->gpr[6] != 1 || env->gpr[7] != 0)
            env->gpr[3] = 1;
        else
            env->gpr[3] = 0;
        break;
    case 29: /* get_vmode_info */
        if (env->gpr[6] != 0) {
            if (env->gpr[6] != 1 || env->gpr[7] != 0) {
                env->gpr[3] = 1;
                break;
            }
        }
        env->gpr[3] = 0;
        env->gpr[4] = (1 << 16) | 1; /* num_vmodes, cur_vmode */
        env->gpr[5] = (1 << 16) | 0; /* num_depths, cur_depth_mode */
        env->gpr[6] = (graphic_width << 16) | graphic_height; /* w, h */
        env->gpr[7] = 85 << 16; /* refresh rate */
        env->gpr[8] = (graphic_depth + 7) & ~7; /* depth (round to byte) */
        linesize = ((graphic_depth + 7) >> 3) * graphic_width;
        linesize = (linesize + 3) & ~3;
        env->gpr[9] = (linesize << 16) | 0; /* row_bytes, offset */
        break;
    case 31: /* set_video power */
        env->gpr[3] = 0;
        break;
    case 39: /* video_ctrl */
        if (env->gpr[6] == 0 || env->gpr[6] == 1)
            vga_vbl_enabled = env->gpr[6];
        env->gpr[3] = 0;
        break;
    case 47:
        break;
    case 59: /* set_color */
        /* R6 = index, R7 = RGB */
        env->gpr[3] = 0;
        break;
    case 64: /* get color */
        /* R6 = index */
        env->gpr[3] = 0;
        break;
    case 116: /* set hwcursor */
        /* R6 = x, R7 = y, R8 = visible, R9 = data */
        break;
    default:
        fprintf(stderr, "unsupported OSI call R5=" REGX "\n",
                ppc_dump_gpr(env, 5));
        break;
    }

    return 1; /* osi_call handled */
}

static void ppc_heathrow_init (ram_addr_t ram_size, int vga_ram_size,
                               const char *boot_device, DisplayState *ds,
                               const char *kernel_filename,
                               const char *kernel_cmdline,
                               const char *initrd_filename,
                               const char *cpu_model)
{
    CPUState *env = NULL, *envs[MAX_CPUS];
    char buf[1024];
    qemu_irq *pic, **heathrow_irqs;
    nvram_t nvram;
    m48t59_t *m48t59;
    int linux_boot, i;
    ram_addr_t ram_offset, vga_ram_offset, bios_offset, vga_bios_offset;
    uint32_t kernel_base, kernel_size, initrd_base, initrd_size;
    PCIBus *pci_bus;
    MacIONVRAMState *nvr;
    int vga_bios_size, bios_size;
    qemu_irq *dummy_irq;
    int pic_mem_index, nvram_mem_index, dbdma_mem_index, cuda_mem_index;
    int ide_mem_index[2];
    int ppc_boot_device;
    BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
    int index;

    linux_boot = (kernel_filename != NULL);

    /* init CPUs */
    if (cpu_model == NULL)
        cpu_model = "G3";
    for (i = 0; i < smp_cpus; i++) {
        env = cpu_init(cpu_model);
        if (!env) {
            fprintf(stderr, "Unable to find PowerPC CPU definition\n");
            exit(1);
        }
        /* Set time-base frequency to 100 Mhz */
        cpu_ppc_tb_init(env, 100UL * 1000UL * 1000UL);
        env->osi_call = vga_osi_call;
        qemu_register_reset(&cpu_ppc_reset, env);
        envs[i] = env;
    }
    if (env->nip < 0xFFF80000) {
        /* Special test for PowerPC 601:
         * the boot vector is at 0xFFF00100, then we need a 1MB BIOS.
         * But the NVRAM is located at 0xFFF04000...
         */
        cpu_abort(env, "G3BW Mac hardware can not handle 1 MB BIOS\n");
    }

    /* allocate RAM */
    ram_offset = qemu_ram_alloc(ram_size);
    cpu_register_physical_memory(0, ram_size, ram_offset);

    /* allocate VGA RAM */
    vga_ram_offset = qemu_ram_alloc(vga_ram_size);

    /* allocate and load BIOS */
    bios_offset = qemu_ram_alloc(BIOS_SIZE);
    if (bios_name == NULL)
        bios_name = BIOS_FILENAME;
    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, bios_name);
    bios_size = load_image(buf, phys_ram_base + bios_offset);
    if (bios_size < 0 || bios_size > BIOS_SIZE) {
        cpu_abort(env, "qemu: could not load PowerPC bios '%s'\n", buf);
        exit(1);
    }
    if (bios_size > 0x00080000) {
        /* As the NVRAM is located at 0xFFF04000, we cannot use 1 MB BIOSes */
        cpu_abort(env, "G3BW Mac hardware can not handle 1 MB BIOS\n");
    }
    cpu_register_physical_memory((uint32_t)(-bios_size),
                                 bios_size, bios_offset | IO_MEM_ROM);

    /* allocate and load VGA BIOS */
    vga_bios_offset = qemu_ram_alloc(VGA_BIOS_SIZE);
    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, VGABIOS_FILENAME);
    vga_bios_size = load_image(buf, phys_ram_base + vga_bios_offset + 8);
    if (vga_bios_size < 0) {
        /* if no bios is present, we can still work */
        fprintf(stderr, "qemu: warning: could not load VGA bios '%s'\n", buf);
        vga_bios_size = 0;
    } else {
        /* set a specific header (XXX: find real Apple format for NDRV
           drivers) */
        phys_ram_base[vga_bios_offset] = 'N';
        phys_ram_base[vga_bios_offset + 1] = 'D';
        phys_ram_base[vga_bios_offset + 2] = 'R';
        phys_ram_base[vga_bios_offset + 3] = 'V';
        cpu_to_be32w((uint32_t *)(phys_ram_base + vga_bios_offset + 4),
                     vga_bios_size);
        vga_bios_size += 8;
    }

    if (linux_boot) {
        kernel_base = KERNEL_LOAD_ADDR;
        /* now we can load the kernel */
        kernel_size = load_image(kernel_filename, phys_ram_base + kernel_base);
        if (kernel_size < 0) {
            cpu_abort(env, "qemu: could not load kernel '%s'\n",
                      kernel_filename);
            exit(1);
        }
        /* load initrd */
        if (initrd_filename) {
            initrd_base = INITRD_LOAD_ADDR;
            initrd_size = load_image(initrd_filename,
                                     phys_ram_base + initrd_base);
            if (initrd_size < 0) {
                cpu_abort(env, "qemu: could not load initial ram disk '%s'\n",
                          initrd_filename);
                exit(1);
            }
        } else {
            initrd_base = 0;
            initrd_size = 0;
        }
        ppc_boot_device = 'm';
    } else {
        kernel_base = 0;
        kernel_size = 0;
        initrd_base = 0;
        initrd_size = 0;
        ppc_boot_device = '\0';
        for (i = 0; boot_device[i] != '\0'; i++) {
            /* TOFIX: for now, the second IDE channel is not properly
             *        used by OHW. The Mac floppy disk are not emulated.
             *        For now, OHW cannot boot from the network.
             */
#if 0
            if (boot_device[i] >= 'a' && boot_device[i] <= 'f') {
                ppc_boot_device = boot_device[i];
                break;
            }
#else
            if (boot_device[i] >= 'c' && boot_device[i] <= 'd') {
                ppc_boot_device = boot_device[i];
                break;
            }
#endif
        }
        if (ppc_boot_device == '\0') {
            fprintf(stderr, "No valid boot device for Mac99 machine\n");
            exit(1);
        }
    }

    isa_mem_base = 0x80000000;

    /* Register 2 MB of ISA IO space */
    isa_mmio_init(0xfe000000, 0x00200000);

    /* XXX: we register only 1 output pin for heathrow PIC */
    heathrow_irqs = qemu_mallocz(smp_cpus * sizeof(qemu_irq *));
    heathrow_irqs[0] =
        qemu_mallocz(smp_cpus * sizeof(qemu_irq) * 1);
    /* Connect the heathrow PIC outputs to the 6xx bus */
    for (i = 0; i < smp_cpus; i++) {
        switch (PPC_INPUT(env)) {
        case PPC_FLAGS_INPUT_6xx:
            heathrow_irqs[i] = heathrow_irqs[0] + (i * 1);
            heathrow_irqs[i][0] =
                ((qemu_irq *)env->irq_inputs)[PPC6xx_INPUT_INT];
            break;
        default:
            cpu_abort(env, "Bus model not supported on OldWorld Mac machine\n");
            exit(1);
        }
    }

    /* init basic PC hardware */
    if (PPC_INPUT(env) != PPC_FLAGS_INPUT_6xx) {
        cpu_abort(env, "Only 6xx bus is supported on heathrow machine\n");
        exit(1);
    }
    pic = heathrow_pic_init(&pic_mem_index, 1, heathrow_irqs);
    pci_bus = pci_grackle_init(0xfec00000, pic);
    pci_vga_init(pci_bus, ds, phys_ram_base + vga_ram_offset,
                 vga_ram_offset, vga_ram_size,
                 vga_bios_offset, vga_bios_size);

    /* XXX: suppress that */
    dummy_irq = i8259_init(NULL);

    /* XXX: use Mac Serial port */
    serial_init(0x3f8, dummy_irq[4], 115200, serial_hds[0]);

    for(i = 0; i < nb_nics; i++) {
        if (!nd_table[i].model)
            nd_table[i].model = "ne2k_pci";
        pci_nic_init(pci_bus, &nd_table[i], -1);
    }

    /* First IDE channel is a CMD646 on the PCI bus */

    if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
        fprintf(stderr, "qemu: too many IDE bus\n");
        exit(1);
    }
    index = drive_get_index(IF_IDE, 0, 0);
    if (index == -1)
        hd[0] = NULL;
    else
        hd[0] =  drives_table[index].bdrv;
    index = drive_get_index(IF_IDE, 0, 1);
    if (index == -1)
        hd[1] = NULL;
    else
        hd[1] =  drives_table[index].bdrv;
    hd[3] = hd[2] = NULL;
    pci_cmd646_ide_init(pci_bus, hd, 0);

    /* Second IDE channel is a MAC IDE on the MacIO bus */
    index = drive_get_index(IF_IDE, 1, 0);
    if (index == -1)
        hd[0] = NULL;
    else
        hd[0] =  drives_table[index].bdrv;
    index = drive_get_index(IF_IDE, 1, 1);
    if (index == -1)
        hd[1] = NULL;
    else
        hd[1] =  drives_table[index].bdrv;
    ide_mem_index[0] = -1;
    ide_mem_index[1] = pmac_ide_init(hd, pic[0x0D]);

    /* cuda also initialize ADB */
    cuda_init(&cuda_mem_index, pic[0x12]);

    adb_kbd_init(&adb_bus);
    adb_mouse_init(&adb_bus);

    nvr = macio_nvram_init(&nvram_mem_index, 0x2000);
    pmac_format_nvram_partition(nvr, 0x2000);

    dbdma_init(&dbdma_mem_index);

    macio_init(pci_bus, 0x0017, 1, pic_mem_index, dbdma_mem_index,
               cuda_mem_index, nvr, 2, ide_mem_index);

    if (usb_enabled) {
        usb_ohci_init_pci(pci_bus, 3, -1);
    }

    if (graphic_depth != 15 && graphic_depth != 32 && graphic_depth != 8)
        graphic_depth = 15;

    m48t59 = m48t59_init(dummy_irq[8], 0xFFF04000, 0x0074, NVRAM_SIZE, 59);
    nvram.opaque = m48t59;
    nvram.read_fn = &m48t59_read;
    nvram.write_fn = &m48t59_write;
    PPC_NVRAM_set_params(&nvram, NVRAM_SIZE, "HEATHROW", ram_size,
                         ppc_boot_device, kernel_base, kernel_size,
                         kernel_cmdline,
                         initrd_base, initrd_size,
                         /* XXX: need an option to load a NVRAM image */
                         0,
                         graphic_width, graphic_height, graphic_depth);
    /* No PCI init: the BIOS will do it */

    /* Special port to get debug messages from Open-Firmware */
    register_ioport_write(0x0F00, 4, 1, &PPC_debug_write, NULL);
}

QEMUMachine heathrow_machine = {
    .name = "g3bw",
    .desc = "Heathrow based PowerMAC",
    .init = ppc_heathrow_init,
    .ram_require = BIOS_SIZE + VGA_BIOS_SIZE + VGA_RAM_SIZE,
    .max_cpus = MAX_CPUS,
};