| /* |
| * 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.h" |
| #include "qemu/timer.h" |
| #include "ptimer.h" |
| #include "qemu-char.h" |
| #include "sysemu/sysemu.h" |
| #include "boards.h" |
| #include "loader.h" |
| #include "elf.h" |
| #include "trace.h" |
| #include "exec/address-spaces.h" |
| |
| #include "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, |
| }; |
| |
| static void leon3_machine_init(void) |
| { |
| qemu_register_machine(&leon3_generic_machine); |
| } |
| |
| machine_init(leon3_machine_init); |