qemu/hw/sparc/leon3.c
<<
>>
Prefs
   1/*
   2 * QEMU Leon3 System Emulator
   3 *
   4 * Copyright (c) 2010-2011 AdaCore
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24#include "hw/hw.h"
  25#include "qemu/timer.h"
  26#include "hw/ptimer.h"
  27#include "sysemu/char.h"
  28#include "sysemu/sysemu.h"
  29#include "sysemu/qtest.h"
  30#include "hw/boards.h"
  31#include "hw/loader.h"
  32#include "elf.h"
  33#include "trace.h"
  34#include "exec/address-spaces.h"
  35
  36#include "hw/sparc/grlib.h"
  37
  38/* Default system clock.  */
  39#define CPU_CLK (40 * 1000 * 1000)
  40
  41#define PROM_FILENAME        "u-boot.bin"
  42
  43#define MAX_PILS 16
  44
  45typedef struct ResetData {
  46    SPARCCPU *cpu;
  47    uint32_t  entry;            /* save kernel entry in case of reset */
  48    target_ulong sp;            /* initial stack pointer */
  49} ResetData;
  50
  51static void main_cpu_reset(void *opaque)
  52{
  53    ResetData *s   = (ResetData *)opaque;
  54    CPUState *cpu = CPU(s->cpu);
  55    CPUSPARCState  *env = &s->cpu->env;
  56
  57    cpu_reset(cpu);
  58
  59    cpu->halted = 0;
  60    env->pc     = s->entry;
  61    env->npc    = s->entry + 4;
  62    env->regbase[6] = s->sp;
  63}
  64
  65void leon3_irq_ack(void *irq_manager, int intno)
  66{
  67    grlib_irqmp_ack((DeviceState *)irq_manager, intno);
  68}
  69
  70static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
  71{
  72    CPUSPARCState *env = (CPUSPARCState *)opaque;
  73    CPUState *cs;
  74
  75    assert(env != NULL);
  76
  77    env->pil_in = pil_in;
  78
  79    if (env->pil_in && (env->interrupt_index == 0 ||
  80                        (env->interrupt_index & ~15) == TT_EXTINT)) {
  81        unsigned int i;
  82
  83        for (i = 15; i > 0; i--) {
  84            if (env->pil_in & (1 << i)) {
  85                int old_interrupt = env->interrupt_index;
  86
  87                env->interrupt_index = TT_EXTINT | i;
  88                if (old_interrupt != env->interrupt_index) {
  89                    cs = CPU(sparc_env_get_cpu(env));
  90                    trace_leon3_set_irq(i);
  91                    cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  92                }
  93                break;
  94            }
  95        }
  96    } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
  97        cs = CPU(sparc_env_get_cpu(env));
  98        trace_leon3_reset_irq(env->interrupt_index & 15);
  99        env->interrupt_index = 0;
 100        cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
 101    }
 102}
 103
 104static void leon3_generic_hw_init(MachineState *machine)
 105{
 106    ram_addr_t ram_size = machine->ram_size;
 107    const char *cpu_model = machine->cpu_model;
 108    const char *kernel_filename = machine->kernel_filename;
 109    SPARCCPU *cpu;
 110    CPUSPARCState   *env;
 111    MemoryRegion *address_space_mem = get_system_memory();
 112    MemoryRegion *ram = g_new(MemoryRegion, 1);
 113    MemoryRegion *prom = g_new(MemoryRegion, 1);
 114    int         ret;
 115    char       *filename;
 116    qemu_irq   *cpu_irqs = NULL;
 117    int         bios_size;
 118    int         prom_size;
 119    ResetData  *reset_info;
 120
 121    /* Init CPU */
 122    if (!cpu_model) {
 123        cpu_model = "LEON3";
 124    }
 125
 126    cpu = cpu_sparc_init(cpu_model);
 127    if (cpu == NULL) {
 128        fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
 129        exit(1);
 130    }
 131    env = &cpu->env;
 132
 133    cpu_sparc_set_id(env, 0);
 134
 135    /* Reset data */
 136    reset_info        = g_malloc0(sizeof(ResetData));
 137    reset_info->cpu   = cpu;
 138    reset_info->sp    = 0x40000000 + ram_size;
 139    qemu_register_reset(main_cpu_reset, reset_info);
 140
 141    /* Allocate IRQ manager */
 142    grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
 143
 144    env->qemu_irq_ack = leon3_irq_manager;
 145
 146    /* Allocate RAM */
 147    if ((uint64_t)ram_size > (1UL << 30)) {
 148        fprintf(stderr,
 149                "qemu: Too much memory for this machine: %d, maximum 1G\n",
 150                (unsigned int)(ram_size / (1024 * 1024)));
 151        exit(1);
 152    }
 153
 154    memory_region_init_ram(ram, NULL, "leon3.ram", ram_size);
 155    vmstate_register_ram_global(ram);
 156    memory_region_add_subregion(address_space_mem, 0x40000000, ram);
 157
 158    /* Allocate BIOS */
 159    prom_size = 8 * 1024 * 1024; /* 8Mb */
 160    memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size);
 161    vmstate_register_ram_global(prom);
 162    memory_region_set_readonly(prom, true);
 163    memory_region_add_subregion(address_space_mem, 0x00000000, prom);
 164
 165    /* Load boot prom */
 166    if (bios_name == NULL) {
 167        bios_name = PROM_FILENAME;
 168    }
 169    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 170
 171    bios_size = get_image_size(filename);
 172
 173    if (bios_size > prom_size) {
 174        fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
 175                filename);
 176        exit(1);
 177    }
 178
 179    if (bios_size > 0) {
 180        ret = load_image_targphys(filename, 0x00000000, bios_size);
 181        if (ret < 0 || ret > prom_size) {
 182            fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
 183            exit(1);
 184        }
 185    } else if (kernel_filename == NULL && !qtest_enabled()) {
 186        fprintf(stderr, "Can't read bios image %s\n", filename);
 187        exit(1);
 188    }
 189
 190    /* Can directly load an application. */
 191    if (kernel_filename != NULL) {
 192        long     kernel_size;
 193        uint64_t entry;
 194
 195        kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 196                               1 /* big endian */, ELF_MACHINE, 0);
 197        if (kernel_size < 0) {
 198            fprintf(stderr, "qemu: could not load kernel '%s'\n",
 199                    kernel_filename);
 200            exit(1);
 201        }
 202        if (bios_size <= 0) {
 203            /* If there is no bios/monitor, start the application.  */
 204            env->pc = entry;
 205            env->npc = entry + 4;
 206            reset_info->entry = entry;
 207        }
 208    }
 209
 210    /* Allocate timers */
 211    grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
 212
 213    /* Allocate uart */
 214    if (serial_hds[0]) {
 215        grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
 216    }
 217}
 218
 219static QEMUMachine leon3_generic_machine = {
 220    .name     = "leon3_generic",
 221    .desc     = "Leon-3 generic",
 222    .init     = leon3_generic_hw_init,
 223};
 224
 225static void leon3_machine_init(void)
 226{
 227    qemu_register_machine(&leon3_generic_machine);
 228}
 229
 230machine_init(leon3_machine_init);
 231