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