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
  33 #include "grlib.h"
  34
  35 /* Default system clock.  */
  36 #define CPU_CLK (40 * 1000 * 1000)
  37
  38 #define PROM_FILENAME        "u-boot.bin"
  39
  40 #define MAX_PILS 16
  41
  42 typedef struct ResetData {
  43     CPUState *env;
  44     uint32_t  entry;            /* save kernel entry in case of reset */
  45 } ResetData;
  46
  47 static void main_cpu_reset(void *opaque)
  48 {
  49     ResetData *s   = (ResetData *)opaque;
  50     CPUState  *env = s->env;
  51
  52     cpu_reset(env);
  53
  54     env->halted = 0;
  55     env->pc     = s->entry;
  56     env->npc    = s->entry + 4;
  57 }
  58
  59 static void leon3_irq_ack(void *irq_manager, int intno)
  60 {
  61     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
  62     leon3_cache_control_int();
  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     ram_addr_t  ram_offset, prom_offset;
 105     int         ret;
 106     char       *filename;
 107     qemu_irq   *cpu_irqs = NULL;
 108     int         bios_size;
 109     int         prom_size;
 110     ResetData  *reset_info;
 111
 112     /* Init CPU */
 113     if (!cpu_model) {
 114         cpu_model = "LEON3";
 115     }
 116
 117     env = cpu_init(cpu_model);
 118     if (!env) {
 119         fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n");
 120         exit(1);
 121     }
 122
 123     cpu_sparc_set_id(env, 0);
 124
 125     /* Reset data */
 126     reset_info        = qemu_mallocz(sizeof(ResetData));
 127     reset_info->env   = env;
 128     qemu_register_reset(main_cpu_reset, reset_info);
 129
 130     /* Allocate IRQ manager */
 131     grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in);
 132
 133     env->qemu_irq_ack = leon3_irq_ack;
 134
 135     /* Allocate RAM */
 136     if ((uint64_t)ram_size > (1UL << 30)) {
 137         fprintf(stderr,
 138                 "qemu: Too much memory for this machine: %d, maximum 1G\n",
 139                 (unsigned int)(ram_size / (1024 * 1024)));
 140         exit(1);
 141     }
 142
 143     ram_offset = qemu_ram_alloc(NULL, "leon3.ram", ram_size);
 144     cpu_register_physical_memory(0x40000000, ram_size, ram_offset | IO_MEM_RAM);
 145
 146     /* Allocate BIOS */
 147     prom_size = 8 * 1024 * 1024; /* 8Mb */
 148     prom_offset = qemu_ram_alloc(NULL, "Leon3.bios", prom_size);
 149     cpu_register_physical_memory(0x00000000, prom_size,
 150                                  prom_offset | IO_MEM_ROM);
 151
 152     /* Load boot prom */
 153     if (bios_name == NULL) {
 154         bios_name = PROM_FILENAME;
 155     }
 156     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 157
 158     bios_size = get_image_size(filename);
 159
 160     if (bios_size > prom_size) {
 161         fprintf(stderr, "qemu: could not load prom '%s': file too big\n",
 162                 filename);
 163         exit(1);
 164     }
 165
 166     if (bios_size > 0) {
 167         ret = load_image_targphys(filename, 0x00000000, bios_size);
 168         if (ret < 0 || ret > prom_size) {
 169             fprintf(stderr, "qemu: could not load prom '%s'\n", filename);
 170             exit(1);
 171         }
 172     } else if (kernel_filename == NULL) {
 173         fprintf(stderr, "Can't read bios image %s\n", filename);
 174         exit(1);
 175     }
 176
 177     /* Can directly load an application. */
 178     if (kernel_filename != NULL) {
 179         long     kernel_size;
 180         uint64_t entry;
 181
 182         kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
 183                                1 /* big endian */, ELF_MACHINE, 0);
 184         if (kernel_size < 0) {
 185             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 186                     kernel_filename);
 187             exit(1);
 188         }
 189         if (bios_size <= 0) {
 190             /* If there is no bios/monitor, start the application.  */
 191             env->pc = entry;
 192             env->npc = entry + 4;
 193             reset_info->entry = entry;
 194         }
 195     }
 196
 197     /* Allocate timers */
 198     grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
 199
 200     /* Allocate uart */
 201     if (serial_hds[0]) {
 202         grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]);
 203     }
 204 }
 205
 206 QEMUMachine leon3_generic_machine = {
 207     .name     = "leon3_generic",
 208     .desc     = "Leon-3 generic",
 209     .init     = leon3_generic_hw_init,
 210     .use_scsi = 0,
 211 };
 212
 213 static void leon3_machine_init(void)
 214 {
 215     qemu_register_machine(&leon3_generic_machine);
 216 }
 217
 218 machine_init(leon3_machine_init);