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