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/*

 * QEMU Uninorth PCI host (for all Mac99 and newer machines)

 *

 * Copyright (c) 2006 Fabrice Bellard

 *

 * 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_mac.h"

#include "pci.h"

typedef target_phys_addr_t pci_addr_t;

#include "pci_host.h"

typedef PCIHostState UNINState;

static void pci_unin_main_config_writel (void *opaque, target_phys_addr_t addr,

                                         uint32_t val)

{

    UNINState *s = opaque;

    int i;

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap32(val);

#endif

    for (i = 11; i < 32; i++) {

        if ((val & (1 << i)) != 0)

            break;

    }

#if 0

    s->config_reg = 0x80000000 | (1 << 16) | (val & 0x7FC) | (i << 11);

#else

    s->config_reg = 0x80000000 | (0 << 16) | (val & 0x7FC) | (i << 11);

#endif

}

static uint32_t pci_unin_main_config_readl (void *opaque,

                                            target_phys_addr_t addr)

{

    UNINState *s = opaque;

    uint32_t val;

    int devfn;

    devfn = (s->config_reg >> 8) & 0xFF;

    val = (1 << (devfn >> 3)) | ((devfn & 0x07) << 8) | (s->config_reg & 0xFC);

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap32(val);

#endif

    return val;

}

static CPUWriteMemoryFunc *pci_unin_main_config_write[] = {

    &pci_unin_main_config_writel,

    &pci_unin_main_config_writel,

    &pci_unin_main_config_writel,

};

static CPUReadMemoryFunc *pci_unin_main_config_read[] = {

    &pci_unin_main_config_readl,

    &pci_unin_main_config_readl,

    &pci_unin_main_config_readl,

};

static CPUWriteMemoryFunc *pci_unin_main_write[] = {

    &pci_host_data_writeb,

    &pci_host_data_writew,

    &pci_host_data_writel,

};

static CPUReadMemoryFunc *pci_unin_main_read[] = {

    &pci_host_data_readb,

    &pci_host_data_readw,

    &pci_host_data_readl,

};

#if 0

static void pci_unin_config_writel (void *opaque, target_phys_addr_t addr,

                                    uint32_t val)

{

    UNINState *s = opaque;

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap32(val);

#endif

    s->config_reg = 0x80000000 | (val & ~0x00000001);

}

static uint32_t pci_unin_config_readl (void *opaque,

                                       target_phys_addr_t addr)

{

    UNINState *s = opaque;

    uint32_t val;

    val = (s->config_reg | 0x00000001) & ~0x80000000;

#ifdef TARGET_WORDS_BIGENDIAN

    val = bswap32(val);

#endif

    return val;

}

static CPUWriteMemoryFunc *pci_unin_config_write[] = {

    &pci_unin_config_writel,

    &pci_unin_config_writel,

    &pci_unin_config_writel,

};

static CPUReadMemoryFunc *pci_unin_config_read[] = {

    &pci_unin_config_readl,

    &pci_unin_config_readl,

    &pci_unin_config_readl,

};

static CPUWriteMemoryFunc *pci_unin_write[] = {

    &pci_host_pci_writeb,

    &pci_host_pci_writew,

    &pci_host_pci_writel,

};

static CPUReadMemoryFunc *pci_unin_read[] = {

    &pci_host_pci_readb,

    &pci_host_pci_readw,

    &pci_host_pci_readl,

};

#endif

/* Don't know if this matches real hardware, but it agrees with OHW.  */

static int pci_unin_map_irq(PCIDevice *pci_dev, int irq_num)

{

    return (irq_num + (pci_dev->devfn >> 3)) & 3;

}

static void pci_unin_set_irq(qemu_irq *pic, int irq_num, int level)

{

    qemu_set_irq(pic[irq_num + 8], level);

}

PCIBus *pci_pmac_init(qemu_irq *pic)

{

    UNINState *s;

    PCIDevice *d;

    int pci_mem_config, pci_mem_data;

    /* Use values found on a real PowerMac */

    /* Uninorth main bus */

    s = qemu_mallocz(sizeof(UNINState));

    s->bus = pci_register_bus(pci_unin_set_irq, pci_unin_map_irq,

                              pic, 11 << 3, 4);

    pci_mem_config = cpu_register_io_memory(0, pci_unin_main_config_read,

                                            pci_unin_main_config_write, s);

    pci_mem_data = cpu_register_io_memory(0, pci_unin_main_read,

                                          pci_unin_main_write, s);

    cpu_register_physical_memory(0xf2800000, 0x1000, pci_mem_config);

    cpu_register_physical_memory(0xf2c00000, 0x1000, pci_mem_data);

    d = pci_register_device(s->bus, "Uni-north main", sizeof(PCIDevice),

                            11 << 3, NULL, NULL);

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_APPLE);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_APPLE_UNI_N_PCI);

    d->config[0x08] = 0x00; // revision

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    d->config[0x0C] = 0x08; // cache_line_size

    d->config[0x0D] = 0x10; // latency_timer

    d->config[0x0E] = 0x00; // header_type

    d->config[0x34] = 0x00; // capabilities_pointer

#if 0 // XXX: not activated as PPC BIOS doesn't handle multiple buses properly

    /* pci-to-pci bridge */

    d = pci_register_device("Uni-north bridge", sizeof(PCIDevice), 0, 13 << 3,

                            NULL, NULL);

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_DEC);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_DEC_21154);

    d->config[0x08] = 0x05; // revision

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_PCI);

    d->config[0x0C] = 0x08; // cache_line_size

    d->config[0x0D] = 0x20; // latency_timer

    d->config[0x0E] = 0x01; // header_type

    d->config[0x18] = 0x01; // primary_bus

    d->config[0x19] = 0x02; // secondary_bus

    d->config[0x1A] = 0x02; // subordinate_bus

    d->config[0x1B] = 0x20; // secondary_latency_timer

    d->config[0x1C] = 0x11; // io_base

    d->config[0x1D] = 0x01; // io_limit

    d->config[0x20] = 0x00; // memory_base

    d->config[0x21] = 0x80;

    d->config[0x22] = 0x00; // memory_limit

    d->config[0x23] = 0x80;

    d->config[0x24] = 0x01; // prefetchable_memory_base

    d->config[0x25] = 0x80;

    d->config[0x26] = 0xF1; // prefectchable_memory_limit

    d->config[0x27] = 0x7F;

    // d->config[0x34] = 0xdc // capabilities_pointer

#endif

#if 0 // XXX: not needed for now

    /* Uninorth AGP bus */

    s = &pci_bridge[1];

    pci_mem_config = cpu_register_io_memory(0, pci_unin_config_read,

                                            pci_unin_config_write, s);

    pci_mem_data = cpu_register_io_memory(0, pci_unin_read,

                                          pci_unin_write, s);

    cpu_register_physical_memory(0xf0800000, 0x1000, pci_mem_config);

    cpu_register_physical_memory(0xf0c00000, 0x1000, pci_mem_data);

    d = pci_register_device("Uni-north AGP", sizeof(PCIDevice), 0, 11 << 3,

                            NULL, NULL);

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_APPLE);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_APPLE_UNI_N_AGP);

    d->config[0x08] = 0x00; // revision

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    d->config[0x0C] = 0x08; // cache_line_size

    d->config[0x0D] = 0x10; // latency_timer

    d->config[0x0E] = 0x00; // header_type

    //    d->config[0x34] = 0x80; // capabilities_pointer

#endif

#if 0 // XXX: not needed for now

    /* Uninorth internal bus */

    s = &pci_bridge[2];

    pci_mem_config = cpu_register_io_memory(0, pci_unin_config_read,

                                            pci_unin_config_write, s);

    pci_mem_data = cpu_register_io_memory(0, pci_unin_read,

                                          pci_unin_write, s);

    cpu_register_physical_memory(0xf4800000, 0x1000, pci_mem_config);

    cpu_register_physical_memory(0xf4c00000, 0x1000, pci_mem_data);

    d = pci_register_device("Uni-north internal", sizeof(PCIDevice),

                            3, 11 << 3, NULL, NULL);

    pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_APPLE);

    pci_config_set_device_id(d->config, PCI_DEVICE_ID_APPLE_UNI_N_I_PCI);

    d->config[0x08] = 0x00; // revision

    pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);

    d->config[0x0C] = 0x08; // cache_line_size

    d->config[0x0D] = 0x10; // latency_timer

    d->config[0x0E] = 0x00; // header_type

    d->config[0x34] = 0x00; // capabilities_pointer

#endif

    return s->bus;

}