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qemu
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qemu/hw/milkymist.c

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/*
* QEMU model for the Milkymist board.
*
* Copyright (c) 2010 Michael Walle <michael@walle.cc>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "sysbus.h"
#include "hw.h"
#include "net.h"
#include "flash.h"
#include "sysemu.h"
#include "devices.h"
#include "boards.h"
#include "loader.h"
#include "elf.h"
#include "blockdev.h"
#include "milkymist-hw.h"
#include "lm32.h"
#include "exec-memory.h"
#define BIOS_FILENAME "mmone-bios.bin"
#define BIOS_OFFSET 0x00860000
#define BIOS_SIZE (512*1024)
#define KERNEL_LOAD_ADDR 0x40000000
typedef struct {
LM32CPU *cpu;
target_phys_addr_t bootstrap_pc;
target_phys_addr_t flash_base;
target_phys_addr_t initrd_base;
size_t initrd_size;
target_phys_addr_t cmdline_base;
} ResetInfo;
static void cpu_irq_handler(void *opaque, int irq, int level)
{
CPULM32State *env = opaque;
if (level) {
cpu_interrupt(env, CPU_INTERRUPT_HARD);
} else {
cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
}
}
static void main_cpu_reset(void *opaque)
{
ResetInfo *reset_info = opaque;
CPULM32State *env = &reset_info->cpu->env;
cpu_reset(CPU(reset_info->cpu));
/* init defaults */
env->pc = reset_info->bootstrap_pc;
env->regs[R_R1] = reset_info->cmdline_base;
env->regs[R_R2] = reset_info->initrd_base;
env->regs[R_R3] = reset_info->initrd_base + reset_info->initrd_size;
env->eba = reset_info->flash_base;
env->deba = reset_info->flash_base;
}
static void
milkymist_init(ram_addr_t ram_size_not_used,
const char *boot_device,
const char *kernel_filename,
const char *kernel_cmdline,
const char *initrd_filename, const char *cpu_model)
{
LM32CPU *cpu;
CPULM32State *env;
int kernel_size;
DriveInfo *dinfo;
MemoryRegion *address_space_mem = get_system_memory();
MemoryRegion *phys_sdram = g_new(MemoryRegion, 1);
qemu_irq irq[32], *cpu_irq;
int i;
char *bios_filename;
ResetInfo *reset_info;
/* memory map */
target_phys_addr_t flash_base = 0x00000000;
size_t flash_sector_size = 128 * 1024;
size_t flash_size = 32 * 1024 * 1024;
target_phys_addr_t sdram_base = 0x40000000;
size_t sdram_size = 128 * 1024 * 1024;
target_phys_addr_t initrd_base = sdram_base + 0x1002000;
target_phys_addr_t cmdline_base = sdram_base + 0x1000000;
size_t initrd_max = sdram_size - 0x1002000;
reset_info = g_malloc0(sizeof(ResetInfo));
if (cpu_model == NULL) {
cpu_model = "lm32-full";
}
cpu = cpu_lm32_init(cpu_model);
env = &cpu->env;
reset_info->cpu = cpu;
cpu_lm32_set_phys_msb_ignore(env, 1);
memory_region_init_ram(phys_sdram, "milkymist.sdram", sdram_size);
vmstate_register_ram_global(phys_sdram);
memory_region_add_subregion(address_space_mem, sdram_base, phys_sdram);
dinfo = drive_get(IF_PFLASH, 0, 0);
/* Numonyx JS28F256J3F105 */
pflash_cfi01_register(flash_base, NULL, "milkymist.flash", flash_size,
dinfo ? dinfo->bdrv : NULL, flash_sector_size,
flash_size / flash_sector_size, 2,
0x00, 0x89, 0x00, 0x1d, 1);
/* create irq lines */
cpu_irq = qemu_allocate_irqs(cpu_irq_handler, env, 1);
env->pic_state = lm32_pic_init(*cpu_irq);
for (i = 0; i < 32; i++) {
irq[i] = qdev_get_gpio_in(env->pic_state, i);
}
/* load bios rom */
if (bios_name == NULL) {
bios_name = BIOS_FILENAME;
}
bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
if (bios_filename) {
load_image_targphys(bios_filename, BIOS_OFFSET, BIOS_SIZE);
}
reset_info->bootstrap_pc = BIOS_OFFSET;
/* if no kernel is given no valid bios rom is a fatal error */
if (!kernel_filename && !dinfo && !bios_filename) {
fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n",
bios_name);
exit(1);
}
milkymist_uart_create(0x60000000, irq[0]);
milkymist_sysctl_create(0x60001000, irq[1], irq[2], irq[3],
80000000, 0x10014d31, 0x0000041f, 0x00000001);
milkymist_hpdmc_create(0x60002000);
milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff);
milkymist_memcard_create(0x60004000);
milkymist_ac97_create(0x60005000, irq[4], irq[5], irq[6], irq[7]);
milkymist_pfpu_create(0x60006000, irq[8]);
milkymist_tmu2_create(0x60007000, irq[9]);
milkymist_minimac2_create(0x60008000, 0x30000000, irq[10], irq[11]);
milkymist_softusb_create(0x6000f000, irq[15],
0x20000000, 0x1000, 0x20020000, 0x2000);
/* make sure juart isn't the first chardev */
env->juart_state = lm32_juart_init();
if (kernel_filename) {
uint64_t entry;
/* Boots a kernel elf binary. */
kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL,
1, ELF_MACHINE, 0);
reset_info->bootstrap_pc = entry;
if (kernel_size < 0) {
kernel_size = load_image_targphys(kernel_filename, sdram_base,
sdram_size);
reset_info->bootstrap_pc = sdram_base;
}
if (kernel_size < 0) {
fprintf(stderr, "qemu: could not load kernel '%s'\n",
kernel_filename);
exit(1);
}
}
if (kernel_cmdline && strlen(kernel_cmdline)) {
pstrcpy_targphys("cmdline", cmdline_base, TARGET_PAGE_SIZE,
kernel_cmdline);
reset_info->cmdline_base = (uint32_t)cmdline_base;
}
if (initrd_filename) {
size_t initrd_size;
initrd_size = load_image_targphys(initrd_filename, initrd_base,
initrd_max);
reset_info->initrd_base = (uint32_t)initrd_base;
reset_info->initrd_size = (uint32_t)initrd_size;
}
qemu_register_reset(main_cpu_reset, reset_info);
}
static QEMUMachine milkymist_machine = {
.name = "milkymist",
.desc = "Milkymist One",
.init = milkymist_init,
.is_default = 0
};
static void milkymist_machine_init(void)
{
qemu_register_machine(&milkymist_machine);
}
machine_init(milkymist_machine_init);
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