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