/*
 * qtest I440FX test case
 *
 * Copyright IBM, Corp. 2012-2013
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

#include "libqos/pci.h"
#include "libqos/pci-pc.h"
#include "libqtest.h"

#include "hw/pci/pci_regs.h"

#include <glib.h>
#include <string.h>

#define BROKEN 1

#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))

typedef struct TestData
{
    int num_cpus;
    QPCIBus *bus;
} TestData;

static void test_i440fx_defaults(gconstpointer opaque)
{
    const TestData *s = opaque;
    QPCIDevice *dev;
    uint32_t value;

    dev = qpci_device_find(s->bus, QPCI_DEVFN(0, 0));
    g_assert(dev != NULL);

    /* 3.2.2 */
    g_assert_cmpint(qpci_config_readw(dev, PCI_VENDOR_ID), ==, 0x8086);
    /* 3.2.3 */
    g_assert_cmpint(qpci_config_readw(dev, PCI_DEVICE_ID), ==, 0x1237);
#ifndef BROKEN
    /* 3.2.4 */
    g_assert_cmpint(qpci_config_readw(dev, PCI_COMMAND), ==, 0x0006);
    /* 3.2.5 */
    g_assert_cmpint(qpci_config_readw(dev, PCI_STATUS), ==, 0x0280);
#endif
    /* 3.2.7 */
    g_assert_cmpint(qpci_config_readb(dev, PCI_CLASS_PROG), ==, 0x00);
    g_assert_cmpint(qpci_config_readw(dev, PCI_CLASS_DEVICE), ==, 0x0600);
    /* 3.2.8 */
    g_assert_cmpint(qpci_config_readb(dev, PCI_LATENCY_TIMER), ==, 0x00);
    /* 3.2.9 */
    g_assert_cmpint(qpci_config_readb(dev, PCI_HEADER_TYPE), ==, 0x00);
    /* 3.2.10 */
    g_assert_cmpint(qpci_config_readb(dev, PCI_BIST), ==, 0x00);

    /* 3.2.11 */
    value = qpci_config_readw(dev, 0x50); /* PMCCFG */
    if (s->num_cpus == 1) { /* WPE */
        g_assert(!(value & (1 << 15)));
    } else {
        g_assert((value & (1 << 15)));
    }

    g_assert(!(value & (1 << 6))); /* EPTE */

    /* 3.2.12 */
    g_assert_cmpint(qpci_config_readb(dev, 0x52), ==, 0x00); /* DETURBO */
    /* 3.2.13 */
#ifndef BROKEN
    g_assert_cmpint(qpci_config_readb(dev, 0x53), ==, 0x80); /* DBC */
#endif
    /* 3.2.14 */
    g_assert_cmpint(qpci_config_readb(dev, 0x54), ==, 0x00); /* AXC */
    /* 3.2.15 */
    g_assert_cmpint(qpci_config_readw(dev, 0x55), ==, 0x0000); /* DRT */
#ifndef BROKEN
    /* 3.2.16 */
    g_assert_cmpint(qpci_config_readb(dev, 0x57), ==, 0x01); /* DRAMC */
    /* 3.2.17 */
    g_assert_cmpint(qpci_config_readb(dev, 0x58), ==, 0x10); /* DRAMT */
#endif
    /* 3.2.18 */
    g_assert_cmpint(qpci_config_readb(dev, 0x59), ==, 0x00); /* PAM0 */
    g_assert_cmpint(qpci_config_readb(dev, 0x5A), ==, 0x00); /* PAM1 */
    g_assert_cmpint(qpci_config_readb(dev, 0x5B), ==, 0x00); /* PAM2 */
    g_assert_cmpint(qpci_config_readb(dev, 0x5C), ==, 0x00); /* PAM3 */
    g_assert_cmpint(qpci_config_readb(dev, 0x5D), ==, 0x00); /* PAM4 */
    g_assert_cmpint(qpci_config_readb(dev, 0x5E), ==, 0x00); /* PAM5 */
    g_assert_cmpint(qpci_config_readb(dev, 0x5F), ==, 0x00); /* PAM6 */
#ifndef BROKEN
    /* 3.2.19 */
    g_assert_cmpint(qpci_config_readb(dev, 0x60), ==, 0x01); /* DRB0 */
    g_assert_cmpint(qpci_config_readb(dev, 0x61), ==, 0x01); /* DRB1 */
    g_assert_cmpint(qpci_config_readb(dev, 0x62), ==, 0x01); /* DRB2 */
    g_assert_cmpint(qpci_config_readb(dev, 0x63), ==, 0x01); /* DRB3 */
    g_assert_cmpint(qpci_config_readb(dev, 0x64), ==, 0x01); /* DRB4 */
    g_assert_cmpint(qpci_config_readb(dev, 0x65), ==, 0x01); /* DRB5 */
    g_assert_cmpint(qpci_config_readb(dev, 0x66), ==, 0x01); /* DRB6 */
    g_assert_cmpint(qpci_config_readb(dev, 0x67), ==, 0x01); /* DRB7 */
#endif
    /* 3.2.20 */
    g_assert_cmpint(qpci_config_readb(dev, 0x68), ==, 0x00); /* FDHC */
    /* 3.2.21 */
    g_assert_cmpint(qpci_config_readb(dev, 0x70), ==, 0x00); /* MTT */
#ifndef BROKEN
    /* 3.2.22 */
    g_assert_cmpint(qpci_config_readb(dev, 0x71), ==, 0x10); /* CLT */
#endif
    /* 3.2.23 */
    g_assert_cmpint(qpci_config_readb(dev, 0x72), ==, 0x02); /* SMRAM */
    /* 3.2.24 */
    g_assert_cmpint(qpci_config_readb(dev, 0x90), ==, 0x00); /* ERRCMD */
    /* 3.2.25 */
    g_assert_cmpint(qpci_config_readb(dev, 0x91), ==, 0x00); /* ERRSTS */
    /* 3.2.26 */
    g_assert_cmpint(qpci_config_readb(dev, 0x93), ==, 0x00); /* TRC */
}

#define PAM_RE 1
#define PAM_WE 2

static void pam_set(QPCIDevice *dev, int index, int flags)
{
    int regno = 0x59 + (index / 2);
    uint8_t reg;

    reg = qpci_config_readb(dev, regno);
    if (index & 1) {
        reg = (reg & 0x0F) | (flags << 4);
    } else {
        reg = (reg & 0xF0) | flags;
    }
    qpci_config_writeb(dev, regno, reg);
}

static gboolean verify_area(uint32_t start, uint32_t end, uint8_t value)
{
    uint32_t size = end - start + 1;
    gboolean ret = TRUE;
    uint8_t *data;
    int i;

    data = g_malloc0(size);
    memread(start, data, size);

    g_test_message("verify_area: data[0] = 0x%x", data[0]);

    for (i = 0; i < size; i++) {
        if (data[i] != value) {
            ret = FALSE;
            break;
        }
    }

    g_free(data);

    return ret;
}

static void write_area(uint32_t start, uint32_t end, uint8_t value)
{
    uint32_t size = end - start + 1;
    uint8_t *data;

    data = g_malloc0(size);
    memset(data, value, size);
    memwrite(start, data, size);

    g_free(data);
}

static void test_i440fx_pam(gconstpointer opaque)
{
    const TestData *s = opaque;
    QPCIDevice *dev;
    int i;
    static struct {
        uint32_t start;
        uint32_t end;
    } pam_area[] = {
        { 0, 0 },             /* Reserved */
        { 0xF0000, 0xFFFFF }, /* BIOS Area */
        { 0xC0000, 0xC3FFF }, /* Option ROM */
        { 0xC4000, 0xC7FFF }, /* Option ROM */
        { 0xC8000, 0xCBFFF }, /* Option ROM */
        { 0xCC000, 0xCFFFF }, /* Option ROM */
        { 0xD0000, 0xD3FFF }, /* Option ROM */
        { 0xD4000, 0xD7FFF }, /* Option ROM */
        { 0xD8000, 0xDBFFF }, /* Option ROM */
        { 0xDC000, 0xDFFFF }, /* Option ROM */
        { 0xE0000, 0xE3FFF }, /* BIOS Extension */
        { 0xE4000, 0xE7FFF }, /* BIOS Extension */
        { 0xE8000, 0xEBFFF }, /* BIOS Extension */
        { 0xEC000, 0xEFFFF }, /* BIOS Extension */
    };

    dev = qpci_device_find(s->bus, QPCI_DEVFN(0, 0));
    g_assert(dev != NULL);

    for (i = 0; i < ARRAY_SIZE(pam_area); i++) {
        if (pam_area[i].start == pam_area[i].end) {
            continue;
        }

        g_test_message("Checking area 0x%05x..0x%05x",
                       pam_area[i].start, pam_area[i].end);
        /* Switch to RE for the area */
        pam_set(dev, i, PAM_RE);
        /* Verify the RAM is all zeros */
        g_assert(verify_area(pam_area[i].start, pam_area[i].end, 0));

        /* Switch to WE for the area */
        pam_set(dev, i, PAM_RE | PAM_WE);
        /* Write out a non-zero mask to the full area */
        write_area(pam_area[i].start, pam_area[i].end, 0x42);

#ifndef BROKEN
        /* QEMU only supports a limited form of PAM */

        /* Switch to !RE for the area */
        pam_set(dev, i, PAM_WE);
        /* Verify the area is not our mask */
        g_assert(!verify_area(pam_area[i].start, pam_area[i].end, 0x42));
#endif

        /* Verify the area is our new mask */
        g_assert(verify_area(pam_area[i].start, pam_area[i].end, 0x42));

        /* Write out a new mask */
        write_area(pam_area[i].start, pam_area[i].end, 0x82);

#ifndef BROKEN
        /* QEMU only supports a limited form of PAM */

        /* Verify the area is not our mask */
        g_assert(!verify_area(pam_area[i].start, pam_area[i].end, 0x82));

        /* Switch to RE for the area */
        pam_set(dev, i, PAM_RE | PAM_WE);
#endif
        /* Verify the area is our new mask */
        g_assert(verify_area(pam_area[i].start, pam_area[i].end, 0x82));

        /* Reset area */
        pam_set(dev, i, 0);

        /* Verify the area is not our new mask */
        g_assert(!verify_area(pam_area[i].start, pam_area[i].end, 0x82));
    }
}

int main(int argc, char **argv)
{
    QTestState *s;
    TestData data;
    char *cmdline;
    int ret;

    g_test_init(&argc, &argv, NULL);

    data.num_cpus = 1;

    cmdline = g_strdup_printf("-smp %d", data.num_cpus);
    s = qtest_start(cmdline);
    g_free(cmdline);

    data.bus = qpci_init_pc();

    g_test_add_data_func("/i440fx/defaults", &data, test_i440fx_defaults);
    g_test_add_data_func("/i440fx/pam", &data, test_i440fx_pam);
    

    ret = g_test_run();

    if (s) {
        qtest_quit(s);
    }

    return ret;
}