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/units.h"
  26 #include "qemu/error-report.h"
  27 #include "qapi/error.h"
  28 #include "qemu-common.h"
  29 #include "cpu.h"
  30 #include "hw/hw.h"
  31 #include "qemu/timer.h"
  32 #include "hw/ptimer.h"
  33 #include "sysemu/sysemu.h"
  34 #include "sysemu/qtest.h"
  35 #include "hw/boards.h"
  36 #include "hw/loader.h"
  37 #include "elf.h"
  38 #include "trace.h"
  39 #include "exec/address-spaces.h"
  40
  41 #include "hw/sparc/grlib.h"
  42
  43 /* Default system clock.  */
  44 #define CPU_CLK (40 * 1000 * 1000)
  45
  46 #define PROM_FILENAME        "u-boot.bin"
  47
  48 #define MAX_PILS 16
  49
  50 typedef struct ResetData {
  51     SPARCCPU *cpu;
  52     uint32_t  entry;            /* save kernel entry in case of reset */
  53     target_ulong sp;            /* initial stack pointer */
  54 } ResetData;
  55
  56 static void main_cpu_reset(void *opaque)
  57 {
  58     ResetData *s   = (ResetData *)opaque;
  59     CPUState *cpu = CPU(s->cpu);
  60     CPUSPARCState  *env = &s->cpu->env;
  61
  62     cpu_reset(cpu);
  63
  64     cpu->halted = 0;
  65     env->pc     = s->entry;
  66     env->npc    = s->entry + 4;
  67     env->regbase[6] = s->sp;
  68 }
  69
  70 void leon3_irq_ack(void *irq_manager, int intno)
  71 {
  72     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
  73 }
  74
  75 static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
  76 {
  77     CPUSPARCState *env = (CPUSPARCState *)opaque;
  78     CPUState *cs;
  79
  80     assert(env != NULL);
  81
  82     env->pil_in = pil_in;
  83
  84     if (env->pil_in && (env->interrupt_index == 0 ||
  85                         (env->interrupt_index & ~15) == TT_EXTINT)) {
  86         unsigned int i;
  87
  88         for (i = 15; i > 0; i--) {
  89             if (env->pil_in & (1 << i)) {
  90                 int old_interrupt = env->interrupt_index;
  91
  92                 env->interrupt_index = TT_EXTINT | i;
  93                 if (old_interrupt != env->interrupt_index) {
  94                     cs = CPU(sparc_env_get_cpu(env));
  95                     trace_leon3_set_irq(i);
  96                     cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  97                 }
  98                 break;
  99             }
 100         }
 101     } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
 102         cs = CPU(sparc_env_get_cpu(env));
 103         trace_leon3_reset_irq(env->interrupt_index & 15);
 104         env->interrupt_index = 0;
 105         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
 106     }
 107 }
 108
 109 static void leon3_generic_hw_init(MachineState *machine)
 110 {
 111     ram_addr_t ram_size = machine->ram_size;
 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     cpu = SPARC_CPU(cpu_create(machine->cpu_type));
 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     reset_info->sp    = 0x40000000 + ram_size;
 135     qemu_register_reset(main_cpu_reset, reset_info);
 136
 137     /* Allocate IRQ manager */
 138     grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
 139
 140     env->qemu_irq_ack = leon3_irq_manager;
 141
 142     /* Allocate RAM */
 143     if (ram_size > 1 * GiB) {
 144         error_report("Too much memory for this machine: %" PRId64 "MB,"
 145                      " maximum 1G",
 146                      ram_size / MiB);
 147         exit(1);
 148     }
 149
 150     memory_region_allocate_system_memory(ram, NULL, "leon3.ram", ram_size);
 151     memory_region_add_subregion(address_space_mem, 0x40000000, ram);
 152
 153     /* Allocate BIOS */
 154     prom_size = 8 * MiB;
 155     memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size, &error_fatal);
 156     memory_region_set_readonly(prom, true);
 157     memory_region_add_subregion(address_space_mem, 0x00000000, prom);
 158
 159     /* Load boot prom */
 160     if (bios_name == NULL) {
 161         bios_name = PROM_FILENAME;
 162     }
 163     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 164
 165     if (filename) {
 166         bios_size = get_image_size(filename);
 167     } else {
 168         bios_size = -1;
 169     }
 170
 171     if (bios_size > prom_size) {
 172         error_report("could not load prom '%s': file too big", filename);
 173         exit(1);
 174     }
 175
 176     if (bios_size > 0) {
 177         ret = load_image_targphys(filename, 0x00000000, bios_size);
 178         if (ret < 0 || ret > prom_size) {
 179             error_report("could not load prom '%s'", filename);
 180             exit(1);
 181         }
 182     } else if (kernel_filename == NULL && !qtest_enabled()) {
 183         error_report("Can't read bios image %s", filename);
 184         exit(1);
 185     }
 186     g_free(filename);
 187
 188     /* Can directly load an application. */
 189     if (kernel_filename != NULL) {
 190         long     kernel_size;
 191         uint64_t entry;
 192
 193         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 194                                1 /* big endian */, EM_SPARC, 0, 0);
 195         if (kernel_size < 0) {
 196             error_report("could not load kernel '%s'", kernel_filename);
 197             exit(1);
 198         }
 199         if (bios_size <= 0) {
 200             /* If there is no bios/monitor, start the application.  */
 201             env->pc = entry;
 202             env->npc = entry + 4;
 203             reset_info->entry = entry;
 204         }
 205     }
 206
 207     /* Allocate timers */
 208     grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
 209
 210     /* Allocate uart */
 211     if (serial_hd(0)) {
 212         grlib_apbuart_create(0x80000100, serial_hd(0), cpu_irqs[3]);
 213     }
 214 }
 215
 216 static void leon3_generic_machine_init(MachineClass *mc)
 217 {
 218     mc->desc = "Leon-3 generic";
 219     mc->init = leon3_generic_hw_init;
 220     mc->default_cpu_type = SPARC_CPU_TYPE_NAME("LEON3");
 221 }
 222
 223 DEFINE_MACHINE("leon3_generic", leon3_generic_machine_init)