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