/* * QEMU Leon3 System Emulator * * Copyright (c) 2010-2011 AdaCore * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "hw/hw.h" #include "qemu/timer.h" #include "hw/ptimer.h" #include "char/char.h" #include "sysemu/sysemu.h" #include "hw/boards.h" #include "hw/loader.h" #include "elf.h" #include "trace.h" #include "exec/address-spaces.h" #include "hw/grlib.h" /* Default system clock. */ #define CPU_CLK (40 * 1000 * 1000) #define PROM_FILENAME "u-boot.bin" #define MAX_PILS 16 typedef struct ResetData { SPARCCPU *cpu; uint32_t entry; /* save kernel entry in case of reset */ } ResetData; static void main_cpu_reset(void *opaque) { ResetData *s = (ResetData *)opaque; CPUSPARCState *env = &s->cpu->env; cpu_reset(CPU(s->cpu)); env->halted = 0; env->pc = s->entry; env->npc = s->entry + 4; } void leon3_irq_ack(void *irq_manager, int intno) { grlib_irqmp_ack((DeviceState *)irq_manager, intno); } static void leon3_set_pil_in(void *opaque, uint32_t pil_in) { CPUSPARCState *env = (CPUSPARCState *)opaque; assert(env != NULL); env->pil_in = pil_in; if (env->pil_in && (env->interrupt_index == 0 || (env->interrupt_index & ~15) == TT_EXTINT)) { unsigned int i; for (i = 15; i > 0; i--) { if (env->pil_in & (1 << i)) { int old_interrupt = env->interrupt_index; env->interrupt_index = TT_EXTINT | i; if (old_interrupt != env->interrupt_index) { trace_leon3_set_irq(i); cpu_interrupt(env, CPU_INTERRUPT_HARD); } break; } } } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) { trace_leon3_reset_irq(env->interrupt_index & 15); env->interrupt_index = 0; cpu_reset_interrupt(env, CPU_INTERRUPT_HARD); } } static void leon3_generic_hw_init(QEMUMachineInitArgs *args) { ram_addr_t ram_size = args->ram_size; const char *cpu_model = args->cpu_model; const char *kernel_filename = args->kernel_filename; SPARCCPU *cpu; CPUSPARCState *env; MemoryRegion *address_space_mem = get_system_memory(); MemoryRegion *ram = g_new(MemoryRegion, 1); MemoryRegion *prom = g_new(MemoryRegion, 1); int ret; char *filename; qemu_irq *cpu_irqs = NULL; int bios_size; int prom_size; ResetData *reset_info; /* Init CPU */ if (!cpu_model) { cpu_model = "LEON3"; } cpu = cpu_sparc_init(cpu_model); if (cpu == NULL) { fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n"); exit(1); } env = &cpu->env; cpu_sparc_set_id(env, 0); /* Reset data */ reset_info = g_malloc0(sizeof(ResetData)); reset_info->cpu = cpu; qemu_register_reset(main_cpu_reset, reset_info); /* Allocate IRQ manager */ grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in); env->qemu_irq_ack = leon3_irq_manager; /* Allocate RAM */ if ((uint64_t)ram_size > (1UL << 30)) { fprintf(stderr, "qemu: Too much memory for this machine: %d, maximum 1G\n", (unsigned int)(ram_size / (1024 * 1024))); exit(1); } memory_region_init_ram(ram, "leon3.ram", ram_size); vmstate_register_ram_global(ram); memory_region_add_subregion(address_space_mem, 0x40000000, ram); /* Allocate BIOS */ prom_size = 8 * 1024 * 1024; /* 8Mb */ memory_region_init_ram(prom, "Leon3.bios", prom_size); vmstate_register_ram_global(prom); memory_region_set_readonly(prom, true); memory_region_add_subregion(address_space_mem, 0x00000000, prom); /* Load boot prom */ if (bios_name == NULL) { bios_name = PROM_FILENAME; } filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); bios_size = get_image_size(filename); if (bios_size > prom_size) { fprintf(stderr, "qemu: could not load prom '%s': file too big\n", filename); exit(1); } if (bios_size > 0) { ret = load_image_targphys(filename, 0x00000000, bios_size); if (ret < 0 || ret > prom_size) { fprintf(stderr, "qemu: could not load prom '%s'\n", filename); exit(1); } } else if (kernel_filename == NULL) { fprintf(stderr, "Can't read bios image %s\n", filename); exit(1); } /* Can directly load an application. */ if (kernel_filename != NULL) { long kernel_size; uint64_t entry; kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL, 1 /* big endian */, ELF_MACHINE, 0); if (kernel_size < 0) { fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename); exit(1); } if (bios_size <= 0) { /* If there is no bios/monitor, start the application. */ env->pc = entry; env->npc = entry + 4; reset_info->entry = entry; } } /* Allocate timers */ grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6); /* Allocate uart */ if (serial_hds[0]) { grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]); } } static QEMUMachine leon3_generic_machine = { .name = "leon3_generic", .desc = "Leon-3 generic", .init = leon3_generic_hw_init, DEFAULT_MACHINE_OPTIONS, }; static void leon3_machine_init(void) { qemu_register_machine(&leon3_generic_machine); } machine_init(leon3_machine_init);