diff options
Diffstat (limited to 'qemu/hw/lm32/milkymist.c')
| -rw-r--r-- | qemu/hw/lm32/milkymist.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/qemu/hw/lm32/milkymist.c b/qemu/hw/lm32/milkymist.c new file mode 100644 index 000000000..e755f5b24 --- /dev/null +++ b/qemu/hw/lm32/milkymist.c @@ -0,0 +1,224 @@ +/* + * 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 "hw/sysbus.h" +#include "hw/hw.h" +#include "hw/block/flash.h" +#include "sysemu/sysemu.h" +#include "sysemu/qtest.h" +#include "hw/devices.h" +#include "hw/boards.h" +#include "hw/loader.h" +#include "elf.h" +#include "sysemu/block-backend.h" +#include "milkymist-hw.h" +#include "lm32.h" +#include "exec/address-spaces.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; + hwaddr bootstrap_pc; + hwaddr flash_base; + hwaddr initrd_base; + size_t initrd_size; + hwaddr cmdline_base; +} ResetInfo; + +static void cpu_irq_handler(void *opaque, int irq, int level) +{ + LM32CPU *cpu = opaque; + CPUState *cs = CPU(cpu); + + if (level) { + cpu_interrupt(cs, CPU_INTERRUPT_HARD); + } else { + cpu_reset_interrupt(cs, 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(MachineState *machine) +{ + const char *cpu_model = machine->cpu_model; + const char *kernel_filename = machine->kernel_filename; + const char *kernel_cmdline = machine->kernel_cmdline; + const char *initrd_filename = machine->initrd_filename; + 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]; + int i; + char *bios_filename; + ResetInfo *reset_info; + + /* memory map */ + hwaddr flash_base = 0x00000000; + size_t flash_sector_size = 128 * 1024; + size_t flash_size = 32 * 1024 * 1024; + hwaddr sdram_base = 0x40000000; + size_t sdram_size = 128 * 1024 * 1024; + + hwaddr initrd_base = sdram_base + 0x1002000; + hwaddr 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); + if (cpu == NULL) { + fprintf(stderr, "qemu: unable to find CPU '%s'\n", cpu_model); + exit(1); + } + + env = &cpu->env; + reset_info->cpu = cpu; + + cpu_lm32_set_phys_msb_ignore(env, 1); + + memory_region_allocate_system_memory(phys_sdram, NULL, "milkymist.sdram", + sdram_size); + 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 ? blk_by_legacy_dinfo(dinfo) : NULL, + flash_sector_size, flash_size / flash_sector_size, + 2, 0x00, 0x89, 0x00, 0x1d, 1); + + /* create irq lines */ + env->pic_state = lm32_pic_init(qemu_allocate_irq(cpu_irq_handler, cpu, 0)); + 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 && !qtest_enabled()) { + fprintf(stderr, "qemu: could not load Milkymist One bios '%s'\n", + bios_name); + exit(1); + } + g_free(bios_filename); + + 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); |