versatilepb.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

/*
 * ARM Versatile Platform/Application Baseboard System emulation.
 *
 * Copyright (c) 2005-2007 CodeSourcery.
 * Written by Paul Brook
 *
 * This code is licenced under the GPL.
 */

#include "hw.h"
#include "arm-misc.h"
#include "primecell.h"
#include "devices.h"
#include "net.h"
#include "sysemu.h"
#include "pci.h"
#include "boards.h"

/* Primary interrupt controller.  */

typedef struct vpb_sic_state
{
  uint32_t base;
  uint32_t level;
  uint32_t mask;
  uint32_t pic_enable;
  qemu_irq *parent;
  int irq;
} vpb_sic_state;

static void vpb_sic_update(vpb_sic_state *s)
{
    uint32_t flags;

    flags = s->level & s->mask;
    qemu_set_irq(s->parent[s->irq], flags != 0);
}

static void vpb_sic_update_pic(vpb_sic_state *s)
{
    int i;
    uint32_t mask;

    for (i = 21; i <= 30; i++) {
        mask = 1u << i;
        if (!(s->pic_enable & mask))
            continue;
        qemu_set_irq(s->parent[i], (s->level & mask) != 0);
    }
}

static void vpb_sic_set_irq(void *opaque, int irq, int level)
{
    vpb_sic_state *s = (vpb_sic_state *)opaque;
    if (level)
        s->level |= 1u << irq;
    else
        s->level &= ~(1u << irq);
    if (s->pic_enable & (1u << irq))
        qemu_set_irq(s->parent[irq], level);
    vpb_sic_update(s);
}

static uint32_t vpb_sic_read(void *opaque, target_phys_addr_t offset)
{
    vpb_sic_state *s = (vpb_sic_state *)opaque;

    offset -= s->base;
    switch (offset >> 2) {
    case 0: /* STATUS */
        return s->level & s->mask;
    case 1: /* RAWSTAT */
        return s->level;
    case 2: /* ENABLE */
        return s->mask;
    case 4: /* SOFTINT */
        return s->level & 1;
    case 8: /* PICENABLE */
        return s->pic_enable;
    default:
        printf ("vpb_sic_read: Bad register offset 0x%x\n", (int)offset);
        return 0;
    }
}

static void vpb_sic_write(void *opaque, target_phys_addr_t offset,
                          uint32_t value)
{
    vpb_sic_state *s = (vpb_sic_state *)opaque;
    offset -= s->base;

    switch (offset >> 2) {
    case 2: /* ENSET */
        s->mask |= value;
        break;
    case 3: /* ENCLR */
        s->mask &= ~value;
        break;
    case 4: /* SOFTINTSET */
        if (value)
            s->mask |= 1;
        break;
    case 5: /* SOFTINTCLR */
        if (value)
            s->mask &= ~1u;
        break;
    case 8: /* PICENSET */
        s->pic_enable |= (value & 0x7fe00000);
        vpb_sic_update_pic(s);
        break;
    case 9: /* PICENCLR */
        s->pic_enable &= ~value;
        vpb_sic_update_pic(s);
        break;
    default:
        printf ("vpb_sic_write: Bad register offset 0x%x\n", (int)offset);
        return;
    }
    vpb_sic_update(s);
}

static CPUReadMemoryFunc *vpb_sic_readfn[] = {
   vpb_sic_read,
   vpb_sic_read,
   vpb_sic_read
};

static CPUWriteMemoryFunc *vpb_sic_writefn[] = {
   vpb_sic_write,
   vpb_sic_write,
   vpb_sic_write
};

static qemu_irq *vpb_sic_init(uint32_t base, qemu_irq *parent, int irq)
{
    vpb_sic_state *s;
    qemu_irq *qi;
    int iomemtype;

    s = (vpb_sic_state *)qemu_mallocz(sizeof(vpb_sic_state));
    if (!s)
        return NULL;
    qi = qemu_allocate_irqs(vpb_sic_set_irq, s, 32);
    s->base = base;
    s->parent = parent;
    s->irq = irq;
    iomemtype = cpu_register_io_memory(0, vpb_sic_readfn,
                                       vpb_sic_writefn, s);
    cpu_register_physical_memory(base, 0x00001000, iomemtype);
    /* ??? Save/restore.  */
    return qi;
}

/* Board init.  */

/* The AB and PB boards both use the same core, just with different
   peripherans and expansion busses.  For now we emulate a subset of the
   PB peripherals and just change the board ID.  */

static void versatile_init(int 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,
                     int board_id)
{
    CPUState *env;
    qemu_irq *pic;
    qemu_irq *sic;
    void *scsi_hba;
    PCIBus *pci_bus;
    NICInfo *nd;
    int n;
    int done_smc = 0;
    int index;

    if (!cpu_model)
        cpu_model = "arm926";
    env = cpu_init(cpu_model);
    if (!env) {
        fprintf(stderr, "Unable to find CPU definition\n");
        exit(1);
    }
    /* ??? RAM shoud repeat to fill physical memory space.  */
    /* SDRAM at address zero.  */
    cpu_register_physical_memory(0, ram_size, IO_MEM_RAM);

    arm_sysctl_init(0x10000000, 0x41007004);
    pic = arm_pic_init_cpu(env);
    pic = pl190_init(0x10140000, pic[0], pic[1]);
    sic = vpb_sic_init(0x10003000, pic, 31);
    pl050_init(0x10006000, sic[3], 0);
    pl050_init(0x10007000, sic[4], 1);

    pci_bus = pci_vpb_init(sic, 27, 0);
    /* The Versatile PCI bridge does not provide access to PCI IO space,
       so many of the qemu PCI devices are not useable.  */
    for(n = 0; n < nb_nics; n++) {
        nd = &nd_table[n];
        if (!nd->model)
            nd->model = done_smc ? "rtl8139" : "smc91c111";
        if (strcmp(nd->model, "smc91c111") == 0) {
            smc91c111_init(nd, 0x10010000, sic[25]);
        } else {
            pci_nic_init(pci_bus, nd, -1);
        }
    }
    if (usb_enabled) {
        usb_ohci_init_pci(pci_bus, 3, -1);
    }
    if (drive_get_max_bus(IF_SCSI) > 0) {
        fprintf(stderr, "qemu: too many SCSI bus\n");
        exit(1);
    }
    scsi_hba = lsi_scsi_init(pci_bus, -1);
    for (n = 0; n < LSI_MAX_DEVS; n++) {
        index = drive_get_index(IF_SCSI, 0, n);
        if (index == -1)
            continue;
        lsi_scsi_attach(scsi_hba, drives_table[index].bdrv, n);
    }

    pl011_init(0x101f1000, pic[12], serial_hds[0], PL011_ARM);
    pl011_init(0x101f2000, pic[13], serial_hds[1], PL011_ARM);
    pl011_init(0x101f3000, pic[14], serial_hds[2], PL011_ARM);
    pl011_init(0x10009000, sic[6], serial_hds[3], PL011_ARM);

    pl080_init(0x10130000, pic[17], 8);
    sp804_init(0x101e2000, pic[4]);
    sp804_init(0x101e3000, pic[5]);

    /* The versatile/PB actually has a modified Color LCD controller
       that includes hardware cursor support from the PL111.  */
    pl110_init(ds, 0x10120000, pic[16], 1);

    index = drive_get_index(IF_SD, 0, 0);
    if (index == -1) {
        fprintf(stderr, "qemu: missing SecureDigital card\n");
        exit(1);
    }

    pl181_init(0x10005000, drives_table[index].bdrv, sic[22], sic[1]);
#if 0
    /* Disabled because there's no way of specifying a block device.  */
    pl181_init(0x1000b000, NULL, sic, 23, 2);
#endif

    /* Add PL031 Real Time Clock. */
    pl031_init(0x101e8000,pic[10]);

    /* Memory map for Versatile/PB:  */
    /* 0x10000000 System registers.  */
    /* 0x10001000 PCI controller config registers.  */
    /* 0x10002000 Serial bus interface.  */
    /*  0x10003000 Secondary interrupt controller.  */
    /* 0x10004000 AACI (audio).  */
    /*  0x10005000 MMCI0.  */
    /*  0x10006000 KMI0 (keyboard).  */
    /*  0x10007000 KMI1 (mouse).  */
    /* 0x10008000 Character LCD Interface.  */
    /*  0x10009000 UART3.  */
    /* 0x1000a000 Smart card 1.  */
    /*  0x1000b000 MMCI1.  */
    /*  0x10010000 Ethernet.  */
    /* 0x10020000 USB.  */
    /* 0x10100000 SSMC.  */
    /* 0x10110000 MPMC.  */
    /*  0x10120000 CLCD Controller.  */
    /*  0x10130000 DMA Controller.  */
    /*  0x10140000 Vectored interrupt controller.  */
    /* 0x101d0000 AHB Monitor Interface.  */
    /* 0x101e0000 System Controller.  */
    /* 0x101e1000 Watchdog Interface.  */
    /* 0x101e2000 Timer 0/1.  */
    /* 0x101e3000 Timer 2/3.  */
    /* 0x101e4000 GPIO port 0.  */
    /* 0x101e5000 GPIO port 1.  */
    /* 0x101e6000 GPIO port 2.  */
    /* 0x101e7000 GPIO port 3.  */
    /* 0x101e8000 RTC.  */
    /* 0x101f0000 Smart card 0.  */
    /*  0x101f1000 UART0.  */
    /*  0x101f2000 UART1.  */
    /*  0x101f3000 UART2.  */
    /* 0x101f4000 SSPI.  */

    arm_load_kernel(env, ram_size, kernel_filename, kernel_cmdline,
                    initrd_filename, board_id, 0x0);
}

static void vpb_init(int 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)
{
    versatile_init(ram_size, vga_ram_size,
                   boot_device, ds,
                   kernel_filename, kernel_cmdline,
                   initrd_filename, cpu_model, 0x183);
}

static void vab_init(int 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)
{
    versatile_init(ram_size, vga_ram_size,
                   boot_device, ds,
                   kernel_filename, kernel_cmdline,
                   initrd_filename, cpu_model, 0x25e);
}

QEMUMachine versatilepb_machine = {
    "versatilepb",
    "ARM Versatile/PB (ARM926EJ-S)",
    vpb_init,
};

QEMUMachine versatileab_machine = {
    "versatileab",
    "ARM Versatile/AB (ARM926EJ-S)",
    vab_init,
};