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