hw/sparc/leon3.c

   1 /*
   2  * QEMU Leon3 System Emulator
   3  *
   4  * Copyright (c) 2010-2019 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
  25 #include "qemu/osdep.h"
  26 #include "qemu/units.h"
  27 #include "qemu/error-report.h"
  28 #include "qapi/error.h"
  29 #include "qemu-common.h"
  30 #include "qemu/datadir.h"
  31 #include "cpu.h"
  32 #include "hw/irq.h"
  33 #include "qemu/timer.h"
  34 #include "hw/ptimer.h"
  35 #include "hw/qdev-properties.h"
  36 #include "sysemu/sysemu.h"
  37 #include "sysemu/qtest.h"
  38 #include "sysemu/reset.h"
  39 #include "hw/boards.h"
  40 #include "hw/loader.h"
  41 #include "elf.h"
  42 #include "trace.h"
  43
  44 #include "hw/sparc/grlib.h"
  45 #include "hw/misc/grlib_ahb_apb_pnp.h"
  46
  47 /* Default system clock.  */
  48 #define CPU_CLK (40 * 1000 * 1000)
  49
  50 #define LEON3_PROM_FILENAME "u-boot.bin"
  51 #define LEON3_PROM_OFFSET    (0x00000000)
  52 #define LEON3_RAM_OFFSET     (0x40000000)
  53
  54 #define LEON3_UART_OFFSET  (0x80000100)
  55 #define LEON3_UART_IRQ     (3)
  56
  57 #define LEON3_IRQMP_OFFSET (0x80000200)
  58
  59 #define LEON3_TIMER_OFFSET (0x80000300)
  60 #define LEON3_TIMER_IRQ    (6)
  61 #define LEON3_TIMER_COUNT  (2)
  62
  63 #define LEON3_APB_PNP_OFFSET (0x800FF000)
  64 #define LEON3_AHB_PNP_OFFSET (0xFFFFF000)
  65
  66 typedef struct ResetData {
  67     SPARCCPU *cpu;
  68     uint32_t  entry;            /* save kernel entry in case of reset */
  69     target_ulong sp;            /* initial stack pointer */
  70 } ResetData;
  71
  72 static uint32_t *gen_store_u32(uint32_t *code, hwaddr addr, uint32_t val)
  73 {
  74     stl_p(code++, 0x82100000); /* mov %g0, %g1                */
  75     stl_p(code++, 0x84100000); /* mov %g0, %g2                */
  76     stl_p(code++, 0x03000000 +
  77       extract32(addr, 10, 22));
  78                                /* sethi %hi(addr), %g1        */
  79     stl_p(code++, 0x82106000 +
  80       extract32(addr, 0, 10));
  81                                /* or %g1, addr, %g1           */
  82     stl_p(code++, 0x05000000 +
  83       extract32(val, 10, 22));
  84                                /* sethi %hi(val), %g2         */
  85     stl_p(code++, 0x8410a000 +
  86       extract32(val, 0, 10));
  87                                /* or %g2, val, %g2            */
  88     stl_p(code++, 0xc4204000); /* st %g2, [ %g1 ]             */
  89
  90     return code;
  91 }
  92
  93 /*
  94  * When loading a kernel in RAM the machine is expected to be in a different
  95  * state (eg: initialized by the bootloader). This little code reproduces
  96  * this behavior.
  97  */
  98 static void write_bootloader(CPUSPARCState *env, uint8_t *base,
  99                              hwaddr kernel_addr)
 100 {
 101     uint32_t *p = (uint32_t *) base;
 102
 103     /* Initialize the UARTs                                        */
 104     /* *UART_CONTROL = UART_RECEIVE_ENABLE | UART_TRANSMIT_ENABLE; */
 105     p = gen_store_u32(p, 0x80000108, 3);
 106
 107     /* Initialize the TIMER 0                                      */
 108     /* *GPTIMER_SCALER_RELOAD = 40 - 1;                            */
 109     p = gen_store_u32(p, 0x80000304, 39);
 110     /* *GPTIMER0_COUNTER_RELOAD = 0xFFFE;                          */
 111     p = gen_store_u32(p, 0x80000314, 0xFFFFFFFE);
 112     /* *GPTIMER0_CONFIG = GPTIMER_ENABLE | GPTIMER_RESTART;        */
 113     p = gen_store_u32(p, 0x80000318, 3);
 114
 115     /* JUMP to the entry point                                     */
 116     stl_p(p++, 0x82100000); /* mov %g0, %g1 */
 117     stl_p(p++, 0x03000000 + extract32(kernel_addr, 10, 22));
 118                             /* sethi %hi(kernel_addr), %g1 */
 119     stl_p(p++, 0x82106000 + extract32(kernel_addr, 0, 10));
 120                             /* or kernel_addr, %g1 */
 121     stl_p(p++, 0x81c04000); /* jmp  %g1 */
 122     stl_p(p++, 0x01000000); /* nop */
 123 }
 124
 125 static void main_cpu_reset(void *opaque)
 126 {
 127     ResetData *s   = (ResetData *)opaque;
 128     CPUState *cpu = CPU(s->cpu);
 129     CPUSPARCState  *env = &s->cpu->env;
 130
 131     cpu_reset(cpu);
 132
 133     cpu->halted = 0;
 134     env->pc     = s->entry;
 135     env->npc    = s->entry + 4;
 136     env->regbase[6] = s->sp;
 137 }
 138
 139 void leon3_irq_ack(void *irq_manager, int intno)
 140 {
 141     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
 142 }
 143
 144 /*
 145  * This device assumes that the incoming 'level' value on the
 146  * qemu_irq is the interrupt number, not just a simple 0/1 level.
 147  */
 148 static void leon3_set_pil_in(void *opaque, int n, int level)
 149 {
 150     CPUSPARCState *env = opaque;
 151     uint32_t pil_in = level;
 152     CPUState *cs;
 153
 154     assert(env != NULL);
 155
 156     env->pil_in = pil_in;
 157
 158     if (env->pil_in && (env->interrupt_index == 0 ||
 159                         (env->interrupt_index & ~15) == TT_EXTINT)) {
 160         unsigned int i;
 161
 162         for (i = 15; i > 0; i--) {
 163             if (env->pil_in & (1 << i)) {
 164                 int old_interrupt = env->interrupt_index;
 165
 166                 env->interrupt_index = TT_EXTINT | i;
 167                 if (old_interrupt != env->interrupt_index) {
 168                     cs = env_cpu(env);
 169                     trace_leon3_set_irq(i);
 170                     cpu_interrupt(cs, CPU_INTERRUPT_HARD);
 171                 }
 172                 break;
 173             }
 174         }
 175     } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
 176         cs = env_cpu(env);
 177         trace_leon3_reset_irq(env->interrupt_index & 15);
 178         env->interrupt_index = 0;
 179         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
 180     }
 181 }
 182
 183 static void leon3_generic_hw_init(MachineState *machine)
 184 {
 185     ram_addr_t ram_size = machine->ram_size;
 186     const char *bios_name = machine->firmware ?: LEON3_PROM_FILENAME;
 187     const char *kernel_filename = machine->kernel_filename;
 188     SPARCCPU *cpu;
 189     CPUSPARCState   *env;
 190     MemoryRegion *address_space_mem = get_system_memory();
 191     MemoryRegion *prom = g_new(MemoryRegion, 1);
 192     int         ret;
 193     char       *filename;
 194     int         bios_size;
 195     int         prom_size;
 196     ResetData  *reset_info;
 197     DeviceState *dev, *irqmpdev;
 198     int i;
 199     AHBPnp *ahb_pnp;
 200     APBPnp *apb_pnp;
 201
 202     /* Init CPU */
 203     cpu = SPARC_CPU(cpu_create(machine->cpu_type));
 204     env = &cpu->env;
 205
 206     cpu_sparc_set_id(env, 0);
 207
 208     /* Reset data */
 209     reset_info        = g_malloc0(sizeof(ResetData));
 210     reset_info->cpu   = cpu;
 211     reset_info->sp    = LEON3_RAM_OFFSET + ram_size;
 212     qemu_register_reset(main_cpu_reset, reset_info);
 213
 214     ahb_pnp = GRLIB_AHB_PNP(qdev_new(TYPE_GRLIB_AHB_PNP));
 215     sysbus_realize_and_unref(SYS_BUS_DEVICE(ahb_pnp), &error_fatal);
 216     sysbus_mmio_map(SYS_BUS_DEVICE(ahb_pnp), 0, LEON3_AHB_PNP_OFFSET);
 217     grlib_ahb_pnp_add_entry(ahb_pnp, 0, 0, GRLIB_VENDOR_GAISLER,
 218                             GRLIB_LEON3_DEV, GRLIB_AHB_MASTER,
 219                             GRLIB_CPU_AREA);
 220
 221     apb_pnp = GRLIB_APB_PNP(qdev_new(TYPE_GRLIB_APB_PNP));
 222     sysbus_realize_and_unref(SYS_BUS_DEVICE(apb_pnp), &error_fatal);
 223     sysbus_mmio_map(SYS_BUS_DEVICE(apb_pnp), 0, LEON3_APB_PNP_OFFSET);
 224     grlib_ahb_pnp_add_entry(ahb_pnp, LEON3_APB_PNP_OFFSET, 0xFFF,
 225                             GRLIB_VENDOR_GAISLER, GRLIB_APBMST_DEV,
 226                             GRLIB_AHB_SLAVE, GRLIB_AHBMEM_AREA);
 227
 228     /* Allocate IRQ manager */
 229     irqmpdev = qdev_new(TYPE_GRLIB_IRQMP);
 230     qdev_init_gpio_in_named_with_opaque(DEVICE(cpu), leon3_set_pil_in,
 231                                         env, "pil", 1);
 232     qdev_connect_gpio_out_named(irqmpdev, "grlib-irq", 0,
 233                                 qdev_get_gpio_in_named(DEVICE(cpu), "pil", 0));
 234     sysbus_realize_and_unref(SYS_BUS_DEVICE(irqmpdev), &error_fatal);
 235     sysbus_mmio_map(SYS_BUS_DEVICE(irqmpdev), 0, LEON3_IRQMP_OFFSET);
 236     env->irq_manager = irqmpdev;
 237     env->qemu_irq_ack = leon3_irq_manager;
 238     grlib_apb_pnp_add_entry(apb_pnp, LEON3_IRQMP_OFFSET, 0xFFF,
 239                             GRLIB_VENDOR_GAISLER, GRLIB_IRQMP_DEV,
 240                             2, 0, GRLIB_APBIO_AREA);
 241
 242     /* Allocate RAM */
 243     if (ram_size > 1 * GiB) {
 244         error_report("Too much memory for this machine: %" PRId64 "MB,"
 245                      " maximum 1G",
 246                      ram_size / MiB);
 247         exit(1);
 248     }
 249
 250     memory_region_add_subregion(address_space_mem, LEON3_RAM_OFFSET,
 251                                 machine->ram);
 252
 253     /* Allocate BIOS */
 254     prom_size = 8 * MiB;
 255     memory_region_init_rom(prom, NULL, "Leon3.bios", prom_size, &error_fatal);
 256     memory_region_add_subregion(address_space_mem, LEON3_PROM_OFFSET, prom);
 257
 258     /* Load boot prom */
 259     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 260
 261     if (filename) {
 262         bios_size = get_image_size(filename);
 263     } else {
 264         bios_size = -1;
 265     }
 266
 267     if (bios_size > prom_size) {
 268         error_report("could not load prom '%s': file too big", filename);
 269         exit(1);
 270     }
 271
 272     if (bios_size > 0) {
 273         ret = load_image_targphys(filename, LEON3_PROM_OFFSET, bios_size);
 274         if (ret < 0 || ret > prom_size) {
 275             error_report("could not load prom '%s'", filename);
 276             exit(1);
 277         }
 278     } else if (kernel_filename == NULL && !qtest_enabled()) {
 279         error_report("Can't read bios image '%s'", filename
 280                                                    ? filename
 281                                                    : LEON3_PROM_FILENAME);
 282         exit(1);
 283     }
 284     g_free(filename);
 285
 286     /* Can directly load an application. */
 287     if (kernel_filename != NULL) {
 288         long     kernel_size;
 289         uint64_t entry;
 290
 291         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
 292                                &entry, NULL, NULL, NULL,
 293                                1 /* big endian */, EM_SPARC, 0, 0);
 294         if (kernel_size < 0) {
 295             kernel_size = load_uimage(kernel_filename, NULL, &entry,
 296                                       NULL, NULL, NULL);
 297         }
 298         if (kernel_size < 0) {
 299             error_report("could not load kernel '%s'", kernel_filename);
 300             exit(1);
 301         }
 302         if (bios_size <= 0) {
 303             /*
 304              * If there is no bios/monitor just start the application but put
 305              * the machine in an initialized state through a little
 306              * bootloader.
 307              */
 308             uint8_t *bootloader_entry;
 309
 310             bootloader_entry = memory_region_get_ram_ptr(prom);
 311             write_bootloader(env, bootloader_entry, entry);
 312             env->pc = LEON3_PROM_OFFSET;
 313             env->npc = LEON3_PROM_OFFSET + 4;
 314             reset_info->entry = LEON3_PROM_OFFSET;
 315         }
 316     }
 317
 318     /* Allocate timers */
 319     dev = qdev_new(TYPE_GRLIB_GPTIMER);
 320     qdev_prop_set_uint32(dev, "nr-timers", LEON3_TIMER_COUNT);
 321     qdev_prop_set_uint32(dev, "frequency", CPU_CLK);
 322     qdev_prop_set_uint32(dev, "irq-line", LEON3_TIMER_IRQ);
 323     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 324
 325     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_TIMER_OFFSET);
 326     for (i = 0; i < LEON3_TIMER_COUNT; i++) {
 327         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
 328                            qdev_get_gpio_in(irqmpdev, LEON3_TIMER_IRQ + i));
 329     }
 330
 331     grlib_apb_pnp_add_entry(apb_pnp, LEON3_TIMER_OFFSET, 0xFFF,
 332                             GRLIB_VENDOR_GAISLER, GRLIB_GPTIMER_DEV,
 333                             0, LEON3_TIMER_IRQ, GRLIB_APBIO_AREA);
 334
 335     /* Allocate uart */
 336     dev = qdev_new(TYPE_GRLIB_APB_UART);
 337     qdev_prop_set_chr(dev, "chrdev", serial_hd(0));
 338     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 339     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_UART_OFFSET);
 340     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
 341                        qdev_get_gpio_in(irqmpdev, LEON3_UART_IRQ));
 342     grlib_apb_pnp_add_entry(apb_pnp, LEON3_UART_OFFSET, 0xFFF,
 343                             GRLIB_VENDOR_GAISLER, GRLIB_APBUART_DEV, 1,
 344                             LEON3_UART_IRQ, GRLIB_APBIO_AREA);
 345 }
 346
 347 static void leon3_generic_machine_init(MachineClass *mc)
 348 {
 349     mc->desc = "Leon-3 generic";
 350     mc->init = leon3_generic_hw_init;
 351     mc->default_cpu_type = SPARC_CPU_TYPE_NAME("LEON3");
 352     mc->default_ram_id = "leon3.ram";
 353 }
 354
 355 DEFINE_MACHINE("leon3_generic", leon3_generic_machine_init)