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 "qemu/error-report.h"
  26 #include "qapi/error.h"
  27 #include "qemu-common.h"
  28 #include "cpu.h"
  29 #include "hw/hw.h"
  30 #include "qemu/timer.h"
  31 #include "hw/ptimer.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
  49 typedef 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
  55 static 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
  69 void leon3_irq_ack(void *irq_manager, int intno)
  70 {
  71     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
  72 }
  73
  74 static 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
 108 static void leon3_generic_hw_init(MachineState *machine)
 109 {
 110     ram_addr_t ram_size = machine->ram_size;
 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     cpu = SPARC_CPU(cpu_create(machine->cpu_type));
 126     env = &cpu->env;
 127
 128     cpu_sparc_set_id(env, 0);
 129
 130     /* Reset data */
 131     reset_info        = g_malloc0(sizeof(ResetData));
 132     reset_info->cpu   = cpu;
 133     reset_info->sp    = 0x40000000 + ram_size;
 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         error_report("Too much memory for this machine: %d, maximum 1G",
 144                      (unsigned int)(ram_size / (1024 * 1024)));
 145         exit(1);
 146     }
 147
 148     memory_region_allocate_system_memory(ram, NULL, "leon3.ram", ram_size);
 149     memory_region_add_subregion(address_space_mem, 0x40000000, ram);
 150
 151     /* Allocate BIOS */
 152     prom_size = 8 * 1024 * 1024; /* 8Mb */
 153     memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size, &error_fatal);
 154     memory_region_set_readonly(prom, true);
 155     memory_region_add_subregion(address_space_mem, 0x00000000, prom);
 156
 157     /* Load boot prom */
 158     if (bios_name == NULL) {
 159         bios_name = PROM_FILENAME;
 160     }
 161     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 162
 163     if (filename) {
 164         bios_size = get_image_size(filename);
 165     } else {
 166         bios_size = -1;
 167     }
 168
 169     if (bios_size > prom_size) {
 170         error_report("could not load prom '%s': file too big", 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             error_report("could not load prom '%s'", filename);
 178             exit(1);
 179         }
 180     } else if (kernel_filename == NULL && !qtest_enabled()) {
 181         error_report("Can't read bios image %s", filename);
 182         exit(1);
 183     }
 184     g_free(filename);
 185
 186     /* Can directly load an application. */
 187     if (kernel_filename != NULL) {
 188         long     kernel_size;
 189         uint64_t entry;
 190
 191         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 192                                1 /* big endian */, EM_SPARC, 0, 0);
 193         if (kernel_size < 0) {
 194             error_report("could not load kernel '%s'", 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_hd(0)) {
 210         grlib_apbuart_create(0x80000100, serial_hd(0), cpu_irqs[3]);
 211     }
 212 }
 213
 214 static void leon3_generic_machine_init(MachineClass *mc)
 215 {
 216     mc->desc = "Leon-3 generic";
 217     mc->init = leon3_generic_hw_init;
 218     mc->default_cpu_type = SPARC_CPU_TYPE_NAME("LEON3");
 219 }
 220
 221 DEFINE_MACHINE("leon3_generic", leon3_generic_machine_init)