qemu/hw/sparc/leon3.c
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   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 "qemu/osdep.h"
  25#include "qapi/error.h"
  26#include "qemu-common.h"
  27#include "cpu.h"
  28#include "hw/hw.h"
  29#include "qemu/timer.h"
  30#include "hw/ptimer.h"
  31#include "sysemu/char.h"
  32#include "sysemu/sysemu.h"
  33#include "sysemu/qtest.h"
  34#include "hw/boards.h"
  35#include "hw/loader.h"
  36#include "elf.h"
  37#include "trace.h"
  38#include "exec/address-spaces.h"
  39
  40#include "hw/sparc/grlib.h"
  41
  42/* Default system clock.  */
  43#define CPU_CLK (40 * 1000 * 1000)
  44
  45#define PROM_FILENAME        "u-boot.bin"
  46
  47#define MAX_PILS 16
  48
  49typedef struct ResetData {
  50    SPARCCPU *cpu;
  51    uint32_t  entry;            /* save kernel entry in case of reset */
  52    target_ulong sp;            /* initial stack pointer */
  53} ResetData;
  54
  55static void main_cpu_reset(void *opaque)
  56{
  57    ResetData *s   = (ResetData *)opaque;
  58    CPUState *cpu = CPU(s->cpu);
  59    CPUSPARCState  *env = &s->cpu->env;
  60
  61    cpu_reset(cpu);
  62
  63    cpu->halted = 0;
  64    env->pc     = s->entry;
  65    env->npc    = s->entry + 4;
  66    env->regbase[6] = s->sp;
  67}
  68
  69void leon3_irq_ack(void *irq_manager, int intno)
  70{
  71    grlib_irqmp_ack((DeviceState *)irq_manager, intno);
  72}
  73
  74static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
  75{
  76    CPUSPARCState *env = (CPUSPARCState *)opaque;
  77    CPUState *cs;
  78
  79    assert(env != NULL);
  80
  81    env->pil_in = pil_in;
  82
  83    if (env->pil_in && (env->interrupt_index == 0 ||
  84                        (env->interrupt_index & ~15) == TT_EXTINT)) {
  85        unsigned int i;
  86
  87        for (i = 15; i > 0; i--) {
  88            if (env->pil_in & (1 << i)) {
  89                int old_interrupt = env->interrupt_index;
  90
  91                env->interrupt_index = TT_EXTINT | i;
  92                if (old_interrupt != env->interrupt_index) {
  93                    cs = CPU(sparc_env_get_cpu(env));
  94                    trace_leon3_set_irq(i);
  95                    cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  96                }
  97                break;
  98            }
  99        }
 100    } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
 101        cs = CPU(sparc_env_get_cpu(env));
 102        trace_leon3_reset_irq(env->interrupt_index & 15);
 103        env->interrupt_index = 0;
 104        cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
 105    }
 106}
 107
 108static void leon3_generic_hw_init(MachineState *machine)
 109{
 110    ram_addr_t ram_size = machine->ram_size;
 111    const char *cpu_model = machine->cpu_model;
 112    const char *kernel_filename = machine->kernel_filename;
 113    SPARCCPU *cpu;
 114    CPUSPARCState   *env;
 115    MemoryRegion *address_space_mem = get_system_memory();
 116    MemoryRegion *ram = g_new(MemoryRegion, 1);
 117    MemoryRegion *prom = g_new(MemoryRegion, 1);
 118    int         ret;
 119    char       *filename;
 120    qemu_irq   *cpu_irqs = NULL;
 121    int         bios_size;
 122    int         prom_size;
 123    ResetData  *reset_info;
 124
 125    /* Init CPU */
 126    if (!cpu_model) {
 127        cpu_model = "LEON3";
 128    }
 129
 130    cpu = cpu_sparc_init(cpu_model);
 131    if (cpu == NULL) {
 132        fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
 133        exit(1);
 134    }
 135    env = &cpu->env;
 136
 137    cpu_sparc_set_id(env, 0);
 138
 139    /* Reset data */
 140    reset_info        = g_malloc0(sizeof(ResetData));
 141    reset_info->cpu   = cpu;
 142    reset_info->sp    = 0x40000000 + ram_size;
 143    qemu_register_reset(main_cpu_reset, reset_info);
 144
 145    /* Allocate IRQ manager */
 146    grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
 147
 148    env->qemu_irq_ack = leon3_irq_manager;
 149
 150    /* Allocate RAM */
 151    if ((uint64_t)ram_size > (1UL << 30)) {
 152        fprintf(stderr,
 153                "qemu: Too much memory for this machine: %d, maximum 1G\n",
 154                (unsigned int)(ram_size / (1024 * 1024)));
 155        exit(1);
 156    }
 157
 158    memory_region_allocate_system_memory(ram, NULL, "leon3.ram", ram_size);
 159    memory_region_add_subregion(address_space_mem, 0x40000000, ram);
 160
 161    /* Allocate BIOS */
 162    prom_size = 8 * 1024 * 1024; /* 8Mb */
 163    memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size, &error_fatal);
 164    vmstate_register_ram_global(prom);
 165    memory_region_set_readonly(prom, true);
 166    memory_region_add_subregion(address_space_mem, 0x00000000, prom);
 167
 168    /* Load boot prom */
 169    if (bios_name == NULL) {
 170        bios_name = PROM_FILENAME;
 171    }
 172    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 173
 174    if (filename) {
 175        bios_size = get_image_size(filename);
 176    } else {
 177        bios_size = -1;
 178    }
 179
 180    if (bios_size > prom_size) {
 181        fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
 182                filename);
 183        exit(1);
 184    }
 185
 186    if (bios_size > 0) {
 187        ret = load_image_targphys(filename, 0x00000000, bios_size);
 188        if (ret < 0 || ret > prom_size) {
 189            fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
 190            exit(1);
 191        }
 192    } else if (kernel_filename == NULL && !qtest_enabled()) {
 193        fprintf(stderr, "Can't read bios image %s\n", filename);
 194        exit(1);
 195    }
 196    g_free(filename);
 197
 198    /* Can directly load an application. */
 199    if (kernel_filename != NULL) {
 200        long     kernel_size;
 201        uint64_t entry;
 202
 203        kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 204                               1 /* big endian */, EM_SPARC, 0, 0);
 205        if (kernel_size < 0) {
 206            fprintf(stderr, "qemu: could not load kernel '%s'\n",
 207                    kernel_filename);
 208            exit(1);
 209        }
 210        if (bios_size <= 0) {
 211            /* If there is no bios/monitor, start the application.  */
 212            env->pc = entry;
 213            env->npc = entry + 4;
 214            reset_info->entry = entry;
 215        }
 216    }
 217
 218    /* Allocate timers */
 219    grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
 220
 221    /* Allocate uart */
 222    if (serial_hds[0]) {
 223        grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
 224    }
 225}
 226
 227static void leon3_generic_machine_init(MachineClass *mc)
 228{
 229    mc->desc = "Leon-3 generic";
 230    mc->init = leon3_generic_hw_init;
 231}
 232
 233DEFINE_MACHINE("leon3_generic", leon3_generic_machine_init)
 234