diff options
Diffstat (limited to 'hw/xtensa_lx60.c')
| -rw-r--r-- | hw/xtensa_lx60.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/hw/xtensa_lx60.c b/hw/xtensa_lx60.c new file mode 100644 index 0000000..3cebca1 --- /dev/null +++ b/hw/xtensa_lx60.c @@ -0,0 +1,233 @@ +/* + * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of the Open Source and Linux Lab nor the + * names of its contributors may be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "sysemu.h" +#include "boards.h" +#include "loader.h" +#include "elf.h" +#include "memory.h" +#include "exec-memory.h" +#include "pc.h" +#include "sysbus.h" + +typedef struct Lx60FpgaState { + MemoryRegion iomem; + uint32_t leds; + uint32_t switches; +} Lx60FpgaState; + +static void lx60_fpga_reset(void *opaque) +{ + Lx60FpgaState *s = opaque; + + s->leds = 0; + s->switches = 0; +} + +static uint64_t lx60_fpga_read(void *opaque, target_phys_addr_t addr, + unsigned size) +{ + Lx60FpgaState *s = opaque; + + switch (addr) { + case 0x0: /*build date code*/ + return 0x27092011; + + case 0x4: /*processor clock frequency, Hz*/ + return 10000000; + + case 0x8: /*LEDs (off = 0, on = 1)*/ + return s->leds; + + case 0xc: /*DIP switches (off = 0, on = 1)*/ + return s->switches; + } + return 0; +} + +static void lx60_fpga_write(void *opaque, target_phys_addr_t addr, + uint64_t val, unsigned size) +{ + Lx60FpgaState *s = opaque; + + switch (addr) { + case 0x8: /*LEDs (off = 0, on = 1)*/ + s->leds = val; + break; + + case 0x10: /*board reset*/ + if (val == 0xdead) { + qemu_system_reset_request(); + } + break; + } +} + +static const MemoryRegionOps lx60_fpga_ops = { + .read = lx60_fpga_read, + .write = lx60_fpga_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space, + target_phys_addr_t base) +{ + Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState)); + + memory_region_init_io(&s->iomem, &lx60_fpga_ops, s, + "lx60-fpga", 0x10000); + memory_region_add_subregion(address_space, base, &s->iomem); + lx60_fpga_reset(s); + qemu_register_reset(lx60_fpga_reset, s); + return s; +} + +static void lx60_net_init(MemoryRegion *address_space, + target_phys_addr_t base, + target_phys_addr_t descriptors, + target_phys_addr_t buffers, + qemu_irq irq, NICInfo *nd) +{ + DeviceState *dev; + SysBusDevice *s; + MemoryRegion *ram; + + dev = qdev_create(NULL, "open_eth"); + qdev_set_nic_properties(dev, nd); + qdev_init_nofail(dev); + + s = sysbus_from_qdev(dev); + sysbus_connect_irq(s, 0, irq); + memory_region_add_subregion(address_space, base, + sysbus_mmio_get_region(s, 0)); + memory_region_add_subregion(address_space, descriptors, + sysbus_mmio_get_region(s, 1)); + + ram = g_malloc(sizeof(*ram)); + memory_region_init_ram(ram, NULL, "open_eth.ram", 16384); + memory_region_add_subregion(address_space, buffers, ram); +} + +static uint64_t translate_phys_addr(void *env, uint64_t addr) +{ + return cpu_get_phys_page_debug(env, addr); +} + +static void lx60_reset(void *env) +{ + cpu_reset(env); +} + +static void lx60_init(ram_addr_t ram_size, + const char *boot_device, + const char *kernel_filename, const char *kernel_cmdline, + const char *initrd_filename, const char *cpu_model) +{ +#ifdef TARGET_WORDS_BIGENDIAN + int be = 1; +#else + int be = 0; +#endif + MemoryRegion *system_memory = get_system_memory(); + CPUState *env = NULL; + MemoryRegion *ram, *rom, *system_io; + int n; + + for (n = 0; n < smp_cpus; n++) { + env = cpu_init(cpu_model); + if (!env) { + fprintf(stderr, "Unable to find CPU definition\n"); + exit(1); + } + env->sregs[PRID] = n; + qemu_register_reset(lx60_reset, env); + /* Need MMU initialized prior to ELF loading, + * so that ELF gets loaded into virtual addresses + */ + cpu_reset(env); + } + + ram = g_malloc(sizeof(*ram)); + memory_region_init_ram(ram, NULL, "xtensa.sram", ram_size); + memory_region_add_subregion(system_memory, 0, ram); + + rom = g_malloc(sizeof(*rom)); + memory_region_init_ram(rom, NULL, "xtensa.rom", 0x1000); + memory_region_add_subregion(system_memory, 0xfe000000, rom); + + system_io = g_malloc(sizeof(*system_io)); + memory_region_init(system_io, "system.io", 224 * 1024 * 1024); + memory_region_add_subregion(system_memory, 0xf0000000, system_io); + lx60_fpga_init(system_io, 0x0d020000); + if (nd_table[0].vlan) { + lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000, + xtensa_get_extint(env, 1), nd_table); + } + + if (!serial_hds[0]) { + serial_hds[0] = qemu_chr_new("serial0", "null", NULL); + } + + serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0), + 115200, serial_hds[0], DEVICE_NATIVE_ENDIAN); + + if (kernel_filename) { + uint64_t elf_entry; + uint64_t elf_lowaddr; + int success = load_elf(kernel_filename, translate_phys_addr, env, + &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0); + if (success > 0) { + env->pc = elf_entry; + } + } +} + +static void xtensa_lx60_init(ram_addr_t ram_size, + const char *boot_device, + const char *kernel_filename, const char *kernel_cmdline, + const char *initrd_filename, const char *cpu_model) +{ + if (!cpu_model) { + cpu_model = "dc232b"; + } + lx60_init(ram_size, boot_device, kernel_filename, kernel_cmdline, + initrd_filename, cpu_model); +} + +static QEMUMachine xtensa_lx60_machine = { + .name = "lx60", + .desc = "lx60 EVB (dc232b)", + .init = xtensa_lx60_init, + .max_cpus = 4, +}; + +static void xtensa_lx60_machine_init(void) +{ + qemu_register_machine(&xtensa_lx60_machine); +} + +machine_init(xtensa_lx60_machine_init); |