hw/sparc/leon3.c

   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 "char/char.h"
  28 #include "sysemu/sysemu.h"
  29 #include "hw/boards.h"
  30 #include "hw/loader.h"
  31 #include "elf.h"
  32 #include "trace.h"
  33 #include "exec/address-spaces.h"
  34
  35 #include "hw/grlib.h"
  36
  37 /* Default system clock.  */
  38 #define CPU_CLK (40 * 1000 * 1000)
  39
  40 #define PROM_FILENAME        "u-boot.bin"
  41
  42 #define MAX_PILS 16
  43
  44 typedef struct ResetData {
  45     SPARCCPU *cpu;
  46     uint32_t  entry;            /* save kernel entry in case of reset */
  47 } ResetData;
  48
  49 static void main_cpu_reset(void *opaque)
  50 {
  51     ResetData *s   = (ResetData *)opaque;
  52     CPUState *cpu = CPU(s->cpu);
  53     CPUSPARCState  *env = &s->cpu->env;
  54
  55     cpu_reset(cpu);
  56
  57     cpu->halted = 0;
  58     env->pc     = s->entry;
  59     env->npc    = s->entry + 4;
  60 }
  61
  62 void leon3_irq_ack(void *irq_manager, int intno)
  63 {
  64     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
  65 }
  66
  67 static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
  68 {
  69     CPUSPARCState *env = (CPUSPARCState *)opaque;
  70     CPUState *cs;
  71
  72     assert(env != NULL);
  73
  74     env->pil_in = pil_in;
  75
  76     if (env->pil_in && (env->interrupt_index == 0 ||
  77                         (env->interrupt_index & ~15) == TT_EXTINT)) {
  78         unsigned int i;
  79
  80         for (i = 15; i > 0; i--) {
  81             if (env->pil_in & (1 << i)) {
  82                 int old_interrupt = env->interrupt_index;
  83
  84                 env->interrupt_index = TT_EXTINT | i;
  85                 if (old_interrupt != env->interrupt_index) {
  86                     trace_leon3_set_irq(i);
  87                     cpu_interrupt(env, CPU_INTERRUPT_HARD);
  88                 }
  89                 break;
  90             }
  91         }
  92     } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
  93         cs = CPU(sparc_env_get_cpu(env));
  94         trace_leon3_reset_irq(env->interrupt_index & 15);
  95         env->interrupt_index = 0;
  96         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
  97     }
  98 }
  99
 100 static void leon3_generic_hw_init(QEMUMachineInitArgs *args)
 101 {
 102     ram_addr_t ram_size = args->ram_size;
 103     const char *cpu_model = args->cpu_model;
 104     const char *kernel_filename = args->kernel_filename;
 105     SPARCCPU *cpu;
 106     CPUSPARCState   *env;
 107     MemoryRegion *address_space_mem = get_system_memory();
 108     MemoryRegion *ram = g_new(MemoryRegion, 1);
 109     MemoryRegion *prom = g_new(MemoryRegion, 1);
 110     int         ret;
 111     char       *filename;
 112     qemu_irq   *cpu_irqs = NULL;
 113     int         bios_size;
 114     int         prom_size;
 115     ResetData  *reset_info;
 116
 117     /* Init CPU */
 118     if (!cpu_model) {
 119         cpu_model = "LEON3";
 120     }
 121
 122     cpu = cpu_sparc_init(cpu_model);
 123     if (cpu == NULL) {
 124         fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
 125         exit(1);
 126     }
 127     env = &cpu->env;
 128
 129     cpu_sparc_set_id(env, 0);
 130
 131     /* Reset data */
 132     reset_info        = g_malloc0(sizeof(ResetData));
 133     reset_info->cpu   = cpu;
 134     qemu_register_reset(main_cpu_reset, reset_info);
 135
 136     /* Allocate IRQ manager */
 137     grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
 138
 139     env->qemu_irq_ack = leon3_irq_manager;
 140
 141     /* Allocate RAM */
 142     if ((uint64_t)ram_size > (1UL << 30)) {
 143         fprintf(stderr,
 144                 "qemu: Too much memory for this machine: %d, maximum 1G\n",
 145                 (unsigned int)(ram_size / (1024 * 1024)));
 146         exit(1);
 147     }
 148
 149     memory_region_init_ram(ram, "leon3.ram", ram_size);
 150     vmstate_register_ram_global(ram);
 151     memory_region_add_subregion(address_space_mem, 0x40000000, ram);
 152
 153     /* Allocate BIOS */
 154     prom_size = 8 * 1024 * 1024; /* 8Mb */
 155     memory_region_init_ram(prom, "Leon3.bios", prom_size);
 156     vmstate_register_ram_global(prom);
 157     memory_region_set_readonly(prom, true);
 158     memory_region_add_subregion(address_space_mem, 0x00000000, prom);
 159
 160     /* Load boot prom */
 161     if (bios_name == NULL) {
 162         bios_name = PROM_FILENAME;
 163     }
 164     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 165
 166     bios_size = get_image_size(filename);
 167
 168     if (bios_size > prom_size) {
 169         fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
 170                 filename);
 171         exit(1);
 172     }
 173
 174     if (bios_size > 0) {
 175         ret = load_image_targphys(filename, 0x00000000, bios_size);
 176         if (ret < 0 || ret > prom_size) {
 177             fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
 178             exit(1);
 179         }
 180     } else if (kernel_filename == NULL) {
 181         fprintf(stderr, "Can't read bios image %s\n", filename);
 182         exit(1);
 183     }
 184
 185     /* Can directly load an application. */
 186     if (kernel_filename != NULL) {
 187         long     kernel_size;
 188         uint64_t entry;
 189
 190         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 191                                1 /* big endian */, ELF_MACHINE, 0);
 192         if (kernel_size < 0) {
 193             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 194                     kernel_filename);
 195             exit(1);
 196         }
 197         if (bios_size <= 0) {
 198             /* If there is no bios/monitor, start the application.  */
 199             env->pc = entry;
 200             env->npc = entry + 4;
 201             reset_info->entry = entry;
 202         }
 203     }
 204
 205     /* Allocate timers */
 206     grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
 207
 208     /* Allocate uart */
 209     if (serial_hds[0]) {
 210         grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
 211     }
 212 }
 213
 214 static QEMUMachine leon3_generic_machine = {
 215     .name     = "leon3_generic",
 216     .desc     = "Leon-3 generic",
 217     .init     = leon3_generic_hw_init,
 218     DEFAULT_MACHINE_OPTIONS,
 219 };
 220
 221 static void leon3_machine_init(void)
 222 {
 223     qemu_register_machine(&leon3_generic_machine);
 224 }
 225
 226 machine_init(leon3_machine_init);