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 "sysemu/char.h"
  28 #include "sysemu/sysemu.h"
  29 #include "sysemu/qtest.h"
  30 #include "hw/boards.h"
  31 #include "hw/loader.h"
  32 #include "elf.h"
  33 #include "trace.h"
  34 #include "exec/address-spaces.h"
  35
  36 #include "hw/sparc/grlib.h"
  37
  38 /* Default system clock.  */
  39 #define CPU_CLK (40 * 1000 * 1000)
  40
  41 #define PROM_FILENAME        "u-boot.bin"
  42
  43 #define MAX_PILS 16
  44
  45 typedef struct ResetData {
  46     SPARCCPU *cpu;
  47     uint32_t  entry;            /* save kernel entry in case of reset */
  48     target_ulong sp;            /* initial stack pointer */
  49 } ResetData;
  50
  51 static void main_cpu_reset(void *opaque)
  52 {
  53     ResetData *s   = (ResetData *)opaque;
  54     CPUState *cpu = CPU(s->cpu);
  55     CPUSPARCState  *env = &s->cpu->env;
  56
  57     cpu_reset(cpu);
  58
  59     cpu->halted = 0;
  60     env->pc     = s->entry;
  61     env->npc    = s->entry + 4;
  62     env->regbase[6] = s->sp;
  63 }
  64
  65 void leon3_irq_ack(void *irq_manager, int intno)
  66 {
  67     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
  68 }
  69
  70 static void leon3_set_pil_in(void *opaque, uint32_t pil_in)
  71 {
  72     CPUSPARCState *env = (CPUSPARCState *)opaque;
  73     CPUState *cs;
  74
  75     assert(env != NULL);
  76
  77     env->pil_in = pil_in;
  78
  79     if (env->pil_in && (env->interrupt_index == 0 ||
  80                         (env->interrupt_index & ~15) == TT_EXTINT)) {
  81         unsigned int i;
  82
  83         for (i = 15; i > 0; i--) {
  84             if (env->pil_in & (1 << i)) {
  85                 int old_interrupt = env->interrupt_index;
  86
  87                 env->interrupt_index = TT_EXTINT | i;
  88                 if (old_interrupt != env->interrupt_index) {
  89                     cs = CPU(sparc_env_get_cpu(env));
  90                     trace_leon3_set_irq(i);
  91                     cpu_interrupt(cs, CPU_INTERRUPT_HARD);
  92                 }
  93                 break;
  94             }
  95         }
  96     } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
  97         cs = CPU(sparc_env_get_cpu(env));
  98         trace_leon3_reset_irq(env->interrupt_index & 15);
  99         env->interrupt_index = 0;
 100         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
 101     }
 102 }
 103
 104 static void leon3_generic_hw_init(MachineState *machine)
 105 {
 106     ram_addr_t ram_size = machine->ram_size;
 107     const char *cpu_model = machine->cpu_model;
 108     const char *kernel_filename = machine->kernel_filename;
 109     SPARCCPU *cpu;
 110     CPUSPARCState   *env;
 111     MemoryRegion *address_space_mem = get_system_memory();
 112     MemoryRegion *ram = g_new(MemoryRegion, 1);
 113     MemoryRegion *prom = g_new(MemoryRegion, 1);
 114     int         ret;
 115     char       *filename;
 116     qemu_irq   *cpu_irqs = NULL;
 117     int         bios_size;
 118     int         prom_size;
 119     ResetData  *reset_info;
 120
 121     /* Init CPU */
 122     if (!cpu_model) {
 123         cpu_model = "LEON3";
 124     }
 125
 126     cpu = cpu_sparc_init(cpu_model);
 127     if (cpu == NULL) {
 128         fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
 129         exit(1);
 130     }
 131     env = &cpu->env;
 132
 133     cpu_sparc_set_id(env, 0);
 134
 135     /* Reset data */
 136     reset_info        = g_malloc0(sizeof(ResetData));
 137     reset_info->cpu   = cpu;
 138     reset_info->sp    = 0x40000000 + ram_size;
 139     qemu_register_reset(main_cpu_reset, reset_info);
 140
 141     /* Allocate IRQ manager */
 142     grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
 143
 144     env->qemu_irq_ack = leon3_irq_manager;
 145
 146     /* Allocate RAM */
 147     if ((uint64_t)ram_size > (1UL << 30)) {
 148         fprintf(stderr,
 149                 "qemu: Too much memory for this machine: %d, maximum 1G\n",
 150                 (unsigned int)(ram_size / (1024 * 1024)));
 151         exit(1);
 152     }
 153
 154     memory_region_init_ram(ram, NULL, "leon3.ram", ram_size);
 155     vmstate_register_ram_global(ram);
 156     memory_region_add_subregion(address_space_mem, 0x40000000, ram);
 157
 158     /* Allocate BIOS */
 159     prom_size = 8 * 1024 * 1024; /* 8Mb */
 160     memory_region_init_ram(prom, NULL, "Leon3.bios", prom_size);
 161     vmstate_register_ram_global(prom);
 162     memory_region_set_readonly(prom, true);
 163     memory_region_add_subregion(address_space_mem, 0x00000000, prom);
 164
 165     /* Load boot prom */
 166     if (bios_name == NULL) {
 167         bios_name = PROM_FILENAME;
 168     }
 169     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 170
 171     bios_size = get_image_size(filename);
 172
 173     if (bios_size > prom_size) {
 174         fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
 175                 filename);
 176         exit(1);
 177     }
 178
 179     if (bios_size > 0) {
 180         ret = load_image_targphys(filename, 0x00000000, bios_size);
 181         if (ret < 0 || ret > prom_size) {
 182             fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
 183             exit(1);
 184         }
 185     } else if (kernel_filename == NULL && !qtest_enabled()) {
 186         fprintf(stderr, "Can't read bios image %s\n", filename);
 187         exit(1);
 188     }
 189
 190     /* Can directly load an application. */
 191     if (kernel_filename != NULL) {
 192         long     kernel_size;
 193         uint64_t entry;
 194
 195         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 196                                1 /* big endian */, ELF_MACHINE, 0);
 197         if (kernel_size < 0) {
 198             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 199                     kernel_filename);
 200             exit(1);
 201         }
 202         if (bios_size <= 0) {
 203             /* If there is no bios/monitor, start the application.  */
 204             env->pc = entry;
 205             env->npc = entry + 4;
 206             reset_info->entry = entry;
 207         }
 208     }
 209
 210     /* Allocate timers */
 211     grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
 212
 213     /* Allocate uart */
 214     if (serial_hds[0]) {
 215         grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
 216     }
 217 }
 218
 219 static QEMUMachine leon3_generic_machine = {
 220     .name     = "leon3_generic",
 221     .desc     = "Leon-3 generic",
 222     .init     = leon3_generic_hw_init,
 223 };
 224
 225 static void leon3_machine_init(void)
 226 {
 227     qemu_register_machine(&leon3_generic_machine);
 228 }
 229
 230 machine_init(leon3_machine_init);