/* * QEMU model for the Milkymist board. * * Copyright (c) 2010 Michael Walle * * 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 . */ #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" #define BIOS_FILENAME "mmone-bios.bin" #define BIOS_OFFSET 0x00860000 #define BIOS_SIZE (512*1024) #define KERNEL_LOAD_ADDR 0x40000000 typedef struct { CPUState *env; 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) { CPUState *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; CPUState *env = reset_info->env; cpu_reset(env); /* 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) { CPUState *env; int kernel_size; DriveInfo *dinfo; ram_addr_t phys_sdram; MemoryRegion *phys_flash = 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"; } env = cpu_init(cpu_model); reset_info->env = env; cpu_lm32_set_phys_msb_ignore(env, 1); phys_sdram = qemu_ram_alloc(NULL, "milkymist.sdram", sdram_size); cpu_register_physical_memory(sdram_base, sdram_size, phys_sdram | IO_MEM_RAM); memory_region_init_rom_device(phys_flash, &pflash_cfi01_ops_be, NULL, "milkymist.flash", flash_size); dinfo = drive_get(IF_PFLASH, 0, 0); /* Numonyx JS28F256J3F105 */ pflash_cfi01_register(flash_base, phys_flash, dinfo ? dinfo->bdrv : NULL, flash_sector_size, flash_size / flash_sector_size, 2, 0x00, 0x89, 0x00, 0x1d); /* 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], irq[1]); milkymist_sysctl_create(0x60001000, irq[2], irq[3], irq[4], 80000000, 0x10014d31, 0x0000041f, 0x00000001); milkymist_hpdmc_create(0x60002000); milkymist_vgafb_create(0x60003000, 0x40000000, 0x0fffffff); milkymist_memcard_create(0x60004000); milkymist_ac97_create(0x60005000, irq[5], irq[6], irq[7], irq[8]); milkymist_pfpu_create(0x60006000, irq[9]); milkymist_tmu2_create(0x60007000, irq[10]); milkymist_minimac2_create(0x60008000, 0x30000000, irq[11], irq[12]); milkymist_softusb_create(0x6000f000, irq[17], 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);