Archipelago » qemu

/*

 * QEMU Sun4m System Emulator

 * 

 * Copyright (c) 2003-2005 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 "vl.h"

#define KERNEL_LOAD_ADDR     0x00004000

#define CMDLINE_ADDR         0x007ff000

#define INITRD_LOAD_ADDR     0x00800000

#define PROM_SIZE_MAX        (256 * 1024)

#define PROM_ADDR             0xffd00000

#define PROM_FILENAME             "openbios-sparc32"

#define PHYS_JJ_EEPROM        0x71200000        /* m48t08 */

#define PHYS_JJ_IDPROM_OFF        0x1FD8

#define PHYS_JJ_EEPROM_SIZE        0x2000

// IRQs are not PIL ones, but master interrupt controller register

// bits

#define PHYS_JJ_IOMMU        0x10000000        /* I/O MMU */

#define PHYS_JJ_TCX_FB        0x50000000        /* TCX frame buffer */

#define PHYS_JJ_SLAVIO        0x70000000        /* Slavio base */

#define PHYS_JJ_DMA     0x78400000      /* DMA controller */

#define PHYS_JJ_ESP     0x78800000      /* ESP SCSI */

#define PHYS_JJ_ESP_IRQ    18

#define PHYS_JJ_LE      0x78C00000      /* Lance ethernet */

#define PHYS_JJ_LE_IRQ     16

#define PHYS_JJ_CLOCK        0x71D00000      /* Per-CPU timer/counter, L14 */

#define PHYS_JJ_CLOCK_IRQ  7

#define PHYS_JJ_CLOCK1        0x71D10000      /* System timer/counter, L10 */

#define PHYS_JJ_CLOCK1_IRQ 19

#define PHYS_JJ_INTR0        0x71E00000        /* Per-CPU interrupt control registers */

#define PHYS_JJ_INTR_G        0x71E10000        /* Master interrupt control registers */

#define PHYS_JJ_MS_KBD        0x71000000        /* Mouse and keyboard */

#define PHYS_JJ_MS_KBD_IRQ    14

#define PHYS_JJ_SER        0x71100000        /* Serial */

#define PHYS_JJ_SER_IRQ    15

#define PHYS_JJ_FDC        0x71400000        /* Floppy */

#define PHYS_JJ_FLOPPY_IRQ 22

#define PHYS_JJ_ME_IRQ 30                /* Module error, power fail */

#define PHYS_JJ_CS      0x6c000000      /* Crystal CS4231 */

#define PHYS_JJ_CS_IRQ  5

#define MAX_CPUS 16

/* TSC handling */

uint64_t cpu_get_tsc()

{

    return qemu_get_clock(vm_clock);

}

int DMA_get_channel_mode (int nchan)

{

    return 0;

}

int DMA_read_memory (int nchan, void *buf, int pos, int size)

{

    return 0;

}

int DMA_write_memory (int nchan, void *buf, int pos, int size)

{

    return 0;

}

void DMA_hold_DREQ (int nchan) {}

void DMA_release_DREQ (int nchan) {}

void DMA_schedule(int nchan) {}

void DMA_run (void) {}

void DMA_init (int high_page_enable) {}

void DMA_register_channel (int nchan,

                           DMA_transfer_handler transfer_handler,

                           void *opaque)

{

}

static void nvram_set_word (m48t59_t *nvram, uint32_t addr, uint16_t value)

{

    m48t59_write(nvram, addr++, (value >> 8) & 0xff);

    m48t59_write(nvram, addr++, value & 0xff);

}

static void nvram_set_lword (m48t59_t *nvram, uint32_t addr, uint32_t value)

{

    m48t59_write(nvram, addr++, value >> 24);

    m48t59_write(nvram, addr++, (value >> 16) & 0xff);

    m48t59_write(nvram, addr++, (value >> 8) & 0xff);

    m48t59_write(nvram, addr++, value & 0xff);

}

static void nvram_set_string (m48t59_t *nvram, uint32_t addr,

                       const unsigned char *str, uint32_t max)

{

    unsigned int i;

    for (i = 0; i < max && str[i] != '\0'; i++) {

        m48t59_write(nvram, addr + i, str[i]);

    }

    m48t59_write(nvram, addr + max - 1, '\0');

}

static m48t59_t *nvram;

extern int nographic;

static void nvram_init(m48t59_t *nvram, uint8_t *macaddr, const char *cmdline,

                       int boot_device, uint32_t RAM_size,

                       uint32_t kernel_size,

                       int width, int height, int depth)

{

    unsigned char tmp = 0;

    int i, j;

    // Try to match PPC NVRAM

    nvram_set_string(nvram, 0x00, "QEMU_BIOS", 16);

    nvram_set_lword(nvram,  0x10, 0x00000001); /* structure v1 */

    // NVRAM_size, arch not applicable

    m48t59_write(nvram, 0x2D, smp_cpus & 0xff);

    m48t59_write(nvram, 0x2E, 0);

    m48t59_write(nvram, 0x2F, nographic & 0xff);

    nvram_set_lword(nvram,  0x30, RAM_size);

    m48t59_write(nvram, 0x34, boot_device & 0xff);

    nvram_set_lword(nvram,  0x38, KERNEL_LOAD_ADDR);

    nvram_set_lword(nvram,  0x3C, kernel_size);

    if (cmdline) {

        strcpy(phys_ram_base + CMDLINE_ADDR, cmdline);

        nvram_set_lword(nvram,  0x40, CMDLINE_ADDR);

        nvram_set_lword(nvram,  0x44, strlen(cmdline));

    }

    // initrd_image, initrd_size passed differently

    nvram_set_word(nvram,   0x54, width);

    nvram_set_word(nvram,   0x56, height);

    nvram_set_word(nvram,   0x58, depth);

    // Sun4m specific use

    i = 0x1fd8;

    m48t59_write(nvram, i++, 0x01);

    m48t59_write(nvram, i++, 0x80); /* Sun4m OBP */

    j = 0;

    m48t59_write(nvram, i++, macaddr[j++]);

    m48t59_write(nvram, i++, macaddr[j++]);

    m48t59_write(nvram, i++, macaddr[j++]);

    m48t59_write(nvram, i++, macaddr[j++]);

    m48t59_write(nvram, i++, macaddr[j++]);

    m48t59_write(nvram, i, macaddr[j]);

    /* Calculate checksum */

    for (i = 0x1fd8; i < 0x1fe7; i++) {

        tmp ^= m48t59_read(nvram, i);

    }

    m48t59_write(nvram, 0x1fe7, tmp);

}

static void *slavio_intctl;

void pic_info()

{

    slavio_pic_info(slavio_intctl);

}

void irq_info()

{

    slavio_irq_info(slavio_intctl);

}

void pic_set_irq(int irq, int level)

{

    slavio_pic_set_irq(slavio_intctl, irq, level);

}

void pic_set_irq_new(void *opaque, int irq, int level)

{

    pic_set_irq(irq, level);

}

void pic_set_irq_cpu(int irq, int level, unsigned int cpu)

{

    slavio_pic_set_irq_cpu(slavio_intctl, irq, level, cpu);

}

static void *slavio_misc;

void qemu_system_powerdown(void)

{

    slavio_set_power_fail(slavio_misc, 1);

}

static void main_cpu_reset(void *opaque)

{

    CPUState *env = opaque;

    cpu_reset(env);

}

/* Sun4m hardware initialisation */

static void sun4m_init(int ram_size, int vga_ram_size, int boot_device,

                       DisplayState *ds, const char **fd_filename, int snapshot,

                       const char *kernel_filename, const char *kernel_cmdline,

                       const char *initrd_filename, const char *cpu_model)

{

    CPUState *env, *envs[MAX_CPUS];

    char buf[1024];

    int ret, linux_boot;

    unsigned int i;

    long vram_size = 0x100000, prom_offset, initrd_size, kernel_size;

    void *iommu, *dma, *main_esp, *main_lance = NULL;

    const sparc_def_t *def;

    linux_boot = (kernel_filename != NULL);

    /* init CPUs */

    if (cpu_model == NULL)

        cpu_model = "Fujitsu MB86904";

    sparc_find_by_name(cpu_model, &def);

    if (def == NULL) {

        fprintf(stderr, "Unable to find Sparc CPU definition\n");

        exit(1);

    }

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

        env = cpu_init();

        cpu_sparc_register(env, def);

        envs[i] = env;

        if (i != 0)

            env->halted = 1;

        register_savevm("cpu", i, 3, cpu_save, cpu_load, env);

        qemu_register_reset(main_cpu_reset, env);

    }

    /* allocate RAM */

    cpu_register_physical_memory(0, ram_size, 0);

    iommu = iommu_init(PHYS_JJ_IOMMU);

    slavio_intctl = slavio_intctl_init(PHYS_JJ_INTR0, PHYS_JJ_INTR_G);

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

        slavio_intctl_set_cpu(slavio_intctl, i, envs[i]);

    }

    dma = sparc32_dma_init(PHYS_JJ_DMA, PHYS_JJ_ESP_IRQ, PHYS_JJ_LE_IRQ, iommu, slavio_intctl);

    tcx_init(ds, PHYS_JJ_TCX_FB, phys_ram_base + ram_size, ram_size, vram_size, graphic_width, graphic_height);

    if (nd_table[0].vlan) {

        if (nd_table[0].model == NULL

            || strcmp(nd_table[0].model, "lance") == 0) {

            main_lance = lance_init(&nd_table[0], PHYS_JJ_LE, dma);

        } else {

            fprintf(stderr, "qemu: Unsupported NIC: %s\n", nd_table[0].model);

            exit (1);

        }

    }

    nvram = m48t59_init(0, PHYS_JJ_EEPROM, 0, PHYS_JJ_EEPROM_SIZE, 8);

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

        slavio_timer_init(PHYS_JJ_CLOCK + i * TARGET_PAGE_SIZE, PHYS_JJ_CLOCK_IRQ, 0, i);

    }

    slavio_timer_init(PHYS_JJ_CLOCK1, PHYS_JJ_CLOCK1_IRQ, 2, (unsigned int)-1);

    slavio_serial_ms_kbd_init(PHYS_JJ_MS_KBD, PHYS_JJ_MS_KBD_IRQ);

    // Slavio TTYA (base+4, Linux ttyS0) is the first Qemu serial device

    // Slavio TTYB (base+0, Linux ttyS1) is the second Qemu serial device

    slavio_serial_init(PHYS_JJ_SER, PHYS_JJ_SER_IRQ, serial_hds[1], serial_hds[0]);

    fdctrl_init(PHYS_JJ_FLOPPY_IRQ, 0, 1, PHYS_JJ_FDC, fd_table);

    main_esp = esp_init(bs_table, PHYS_JJ_ESP, dma);

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

        if (bs_table[i]) {

            esp_scsi_attach(main_esp, bs_table[i], i);

        }

    }

    slavio_misc = slavio_misc_init(PHYS_JJ_SLAVIO, PHYS_JJ_ME_IRQ);

    cs_init(PHYS_JJ_CS, PHYS_JJ_CS_IRQ, slavio_intctl);

    sparc32_dma_set_reset_data(dma, main_esp, main_lance);

    prom_offset = ram_size + vram_size;

    cpu_register_physical_memory(PROM_ADDR, 

                                 (PROM_SIZE_MAX + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK, 

                                 prom_offset | IO_MEM_ROM);

    snprintf(buf, sizeof(buf), "%s/%s", bios_dir, PROM_FILENAME);

    ret = load_elf(buf, 0, NULL);

    if (ret < 0) {

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

                buf);

        exit(1);

    }

    kernel_size = 0;

    if (linux_boot) {

        kernel_size = load_elf(kernel_filename, -0xf0000000, NULL);

        if (kernel_size < 0)

            kernel_size = load_aout(kernel_filename, phys_ram_base + KERNEL_LOAD_ADDR);

        if (kernel_size < 0)

            kernel_size = load_image(kernel_filename, phys_ram_base + KERNEL_LOAD_ADDR);

        if (kernel_size < 0) {

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

                    kernel_filename);

            exit(1);

        }

        /* load initrd */

        initrd_size = 0;

        if (initrd_filename) {

            initrd_size = load_image(initrd_filename, phys_ram_base + INITRD_LOAD_ADDR);

            if (initrd_size < 0) {

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

                        initrd_filename);

                exit(1);

            }

        }

        if (initrd_size > 0) {

            for (i = 0; i < 64 * TARGET_PAGE_SIZE; i += TARGET_PAGE_SIZE) {

                if (ldl_raw(phys_ram_base + KERNEL_LOAD_ADDR + i)

                    == 0x48647253) { // HdrS

                    stl_raw(phys_ram_base + KERNEL_LOAD_ADDR + i + 16, INITRD_LOAD_ADDR);

                    stl_raw(phys_ram_base + KERNEL_LOAD_ADDR + i + 20, initrd_size);

                    break;

                }

            }

        }

    }

    nvram_init(nvram, (uint8_t *)&nd_table[0].macaddr, kernel_cmdline, boot_device, ram_size, kernel_size, graphic_width, graphic_height, graphic_depth);

}

QEMUMachine sun4m_machine = {

    "sun4m",

    "Sun4m platform",

    sun4m_init,

};