On Mon, Sep 10, 2012 at 12:20 AM, <crwu...@gmail.com> wrote:
> From: Chris Wulff <crwu...@gmail.com>
>
> Signed-off-by: Chris Wulff <crwu...@gmail.com>
> ---
> default-configs/nios2-linux-user.mak | 1 +
> default-configs/nios2-softmmu.mak | 6 +
> hw/labx_nios2_devicetree.c | 665
> ++++++++++++++++++++++++++++++++++
> hw/nios2/Makefile.objs | 6 +
> 4 files changed, 678 insertions(+)
> create mode 100644 default-configs/nios2-linux-user.mak
> create mode 100644 default-configs/nios2-softmmu.mak
> create mode 100644 hw/labx_nios2_devicetree.c
> create mode 100644 hw/nios2/Makefile.objs
>
> diff --git a/default-configs/nios2-linux-user.mak
> b/default-configs/nios2-linux-user.mak
> new file mode 100644
> index 0000000..5be3eb7
> --- /dev/null
> +++ b/default-configs/nios2-linux-user.mak
> @@ -0,0 +1 @@
> +# Default configuration for nios2-linux-user
> diff --git a/default-configs/nios2-softmmu.mak
> b/default-configs/nios2-softmmu.mak
> new file mode 100644
> index 0000000..09f6046
> --- /dev/null
> +++ b/default-configs/nios2-softmmu.mak
> @@ -0,0 +1,6 @@
> +# Default configuration for nios2-softmmu
> +
> +CONFIG_PTIMER=y
> +CONFIG_PFLASH_CFI01=y
> +CONFIG_ALTERA=y
> +CONFIG_LABX=y
> diff --git a/hw/labx_nios2_devicetree.c b/hw/labx_nios2_devicetree.c
> new file mode 100644
> index 0000000..d91bd9b
> --- /dev/null
> +++ b/hw/labx_nios2_devicetree.c
> @@ -0,0 +1,665 @@
> +/*
> + * Flexible model of nios2 designs that use a device-tree to determine
> + * the hardware configuration.
> + *
> + * Copyright (c) 2012 Chris Wulff <crwu...@gmail.com>
> + *
> + * 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 2.1 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/lgpl-2.1.html>
> + */
> +
> +#include "sysbus.h"
> +#include "hw.h"
> +#include "net.h"
> +#include "flash.h"
> +#include "sysemu.h"
> +#include "devices.h"
> +#include "boards.h"
> +#include "device_tree.h"
> +#include "nios2.h"
> +#include "altera.h"
> +#include "labx_devices.h"
> +#include "loader.h"
> +#include "elf.h"
> +#include "blockdev.h"
> +#include "exec-memory.h"
This interface may not be used by devices.
> +
> +#define LMB_BRAM_SIZE (128 * 1024)
> +
> +static int sopc_device_probe(void *fdt, int node, int pass, uint32_t offset);
> +
> +static struct {
> + uint32_t bootstrap_pc;
> + uint32_t cmdline;
> + uint32_t initrd;
> + uint32_t fdt;
> +} boot_info;
> +
> +/* Current ethernet device index for multiple network interfaces */
> +static int eth_dev_index = -1;
> +
> +static void main_cpu_reset(void *opaque)
> +{
> + Nios2CPU *cpu = opaque;
> + CPUNios2State *env = &cpu->env;
> +
> + cpu_reset(CPU(cpu));
> +
> + env->regs[R_ARG0] = boot_info.cmdline;
> + env->regs[R_ARG1] = boot_info.initrd;
> + env->regs[R_ARG2] = boot_info.fdt;
> + env->regs[R_PC] = boot_info.bootstrap_pc;
> +}
> +
> +#ifndef CONFIG_FDT
> +#error "Device-tree support is required for this target to function"
Probably the file should be built only if CONFIG_FDT is set, otherwise
this will break build.
> +#endif
> +
> +static uint32_t fdt_get_int_from_array(void *fdt, int node,
> + const char *name, int index)
> +{
> + int array_length;
> + const void *array = qemu_devtree_getprop_offset(fdt, node, name,
> + &array_length);
> + if (index >= array_length) {
> + printf("fdt_get_int_from_array: requesting %s from node %d, "
> + "index %d out of range (%d max)\n",
> + name, node, index, array_length);
> + return 0;
> + } else {
> + return qemu_devtree_int_array_index(array, index);
> + }
> +}
> +
> +#define BINARY_DEVICE_TREE_FILE "labx-nios2.dtb"
This belongs to the beginning of the file.
> +static void *get_device_tree(int *fdt_size)
> +{
> + char *path;
> + void *fdt;
> +
> + /* Try the local "local.dtb" override. */
> + fdt = load_device_tree("local.dtb", fdt_size);
> + if (!fdt) {
> + path = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
> + if (path) {
> + fdt = load_device_tree(path, fdt_size);
> + g_free(path);
> + }
> + }
> +
> + return fdt;
> +}
> +
> +static int labx_load_device_tree(target_phys_addr_t addr,
> + uint32_t ramsize,
> + target_phys_addr_t initrd_base,
> + target_phys_addr_t initrd_size,
> + const char *kernel_cmdline)
> +{
> + int fdt_size;
> + void *fdt;
> + int r;
> +
> + fdt = get_device_tree(&fdt_size);
> +
> + if (!fdt) {
> + return 0;
> + }
> +
> + if (kernel_cmdline && strlen(kernel_cmdline)) {
> + r = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
> + kernel_cmdline);
> + if (r < 0) {
> + fprintf(stderr, "couldn't set /chosen/bootargs\n");
> + }
> + }
> + cpu_physical_memory_write(addr, (void *)fdt, fdt_size);
> +
> + return fdt_size;
> +}
> +
> +static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
> +{
> + return addr - 0xC0000000LL;
ULL
> +}
> +
> +static ram_addr_t get_dram_base(void *fdt)
> +{
> + int root = qemu_devtree_node_offset(fdt, "/");
> + int memory = qemu_devtree_subnode_offset_namelen(fdt, root, "memory", 6);
> + if (memory > 0) {
> + int reglen;
> + const void *reg = qemu_devtree_getprop_offset(fdt, memory, "reg",
> + ®len);
> +
> + if (reglen >= 4) {
> + printf("DRAM base %08X, size %08X\n",
Leftover debugging
> + qemu_devtree_int_array_index(reg, 0),
> + qemu_devtree_int_array_index(reg, 1));
> + return qemu_devtree_int_array_index(reg, 0);
> + }
> + }
> +
> + printf("DRAM base not found. Defaulting to 0x00000000\n");
> +
> + return 0x00000000; /* Default to something reasonable */
> +}
> +
> +typedef void (*device_init_func_t)(void *fdt, int node, uint32_t offset);
> +
> +typedef struct {
> + device_init_func_t probe;
> + int pass;
> + const char **compat;
> +
> +} devinfo_t;
CamelCase
> +
> +/*
> + * Interrupt controller device
> + */
> +Nios2CPU *g_cpu;
> +static qemu_irq irq[32] = {};
> +static qemu_irq *cpu_irq;
No globals
> +
> +static void cpu_probe(void *fdt, int node, uint32_t offset)
> +{
> + int i;
> + DeviceState *dev;
> +#if 0 /* TODO: Finish off the vectored-interrupt-controller */
No dead code
> + int reglen;
> + const void *reg = qemu_devtree_getprop_offset(fdt, node, "reg", ®len);
> + uint32_t irq_addr = qemu_devtree_int_array_index(reg, 0) + offset;
> + int nrIrqLen;
> + const void *nrIrq =
> + qemu_devtree_getprop_offset(fdt, node, "ALTR,num-intr-inputs",
> + &nrIrqLen);
> + uint32_t nrIrqs = qemu_devtree_int_array_index(nrIrq, 0);
> +
> + printf(" IRQ BASE %08X NIRQS %d\n", irq_addr, nrIrqs);
> +
> + cpu_irq = nios2_pic_init_cpu(env);
> + dev = altera_vic_create(irq_addr, cpu_irq[0], 2);
> +#else
> + /* Internal interrupt controller (IIC) */
> + cpu_irq = nios2_pic_init_cpu(&g_cpu->env);
> + dev = altera_iic_create(cpu_irq[0], 2);
> +#endif
> +
> + /* TODO: use the entrypoint of the passed in elf file or
> + the device-tree one */
> +#if 0
> + g_cpu->env.reset_addr =
> + fdt_get_int_from_array(fdt, node, "ALTR,reset-addr", 0);
> +#else
> + g_cpu->env.reset_addr = 0xc0000000;
> +#endif
> +
> + g_cpu->env.exception_addr =
> + fdt_get_int_from_array(fdt, node, "ALTR,exception-addr", 0);
> + g_cpu->env.fast_tlb_miss_addr =
> + fdt_get_int_from_array(fdt, node, "ALTR,fast-tlb-miss-addr", 0);
> +
> + /* reset again to use the new reset vector */
> + cpu_reset(CPU(g_cpu));
> +
> + for (i = 0; i < 32; i++) {
> + irq[i] = qdev_get_gpio_in(dev, i);
> + }
> +}
> +
> +devinfo_t cpu_device = {
static const, CamelCase, no _t
> + .probe = &cpu_probe,
> + .pass = 0,
> + .compat = (const char * []) {
> + "ALTR,nios2-11.0",
> + "ALTR,nios2-11.1",
> + "ALTR,nios2-12.0",
> + NULL
> + }
> +};
> +
> +/*
> + * Flash device
> + */
> +static void flash_probe(void *fdt, int node, uint32_t offset)
> +{
> + int reglen;
> + const void *reg = qemu_devtree_getprop_offset(fdt, node, "reg", ®len);
> + uint32_t flash_addr = qemu_devtree_int_array_index(reg, 0) + offset;
> + uint32_t flash_size = qemu_devtree_int_array_index(reg, 1);
> +
> + DriveInfo *dinfo = drive_get(IF_PFLASH, 0, 0);
> + pflash_cfi01_register(flash_addr, NULL,
> + qemu_devtree_get_name(fdt, node, NULL), flash_size,
> + dinfo ? dinfo->bdrv : NULL, (64 * 1024),
> + flash_size >> 16,
> + 1, 0x89, 0x18, 0x0000, 0x0, 0);
> + printf("-- loaded %d bytes to %08X\n",
> + load_image_targphys(qemu_devtree_get_name(fdt, node, NULL),
> + flash_addr, flash_size), flash_addr);
> +}
> +
> +devinfo_t flash_device = {
> + .probe = &flash_probe,
> + .pass = 1,
> + .compat = (const char * []) { "cfi-flash", NULL }
> +};
> +
> +/*
> + * LabX audio packetizer device
> + */
> +static void labx_audio_packetizer_probe(void *fdt, int node, uint32_t offset)
> +{
> + uint32_t packetizer_addr = fdt_get_int_from_array(fdt, node, "reg", 0) +
> + offset;
> + uint32_t packetizer_irq =
> + fdt_get_int_from_array(fdt, node, "interrupts", 0);
> + uint32_t clock_domains =
> + fdt_get_int_from_array(fdt, node, "labx,num-clock-domains", 0);
> + uint32_t cache_words =
> + fdt_get_int_from_array(fdt, node, "labx,cache-data-words", 0);
> +
> + labx_audio_packetizer_create(packetizer_addr, irq[packetizer_irq],
> + clock_domains, cache_words);
> +}
> +
> +devinfo_t labx_audio_packetizer_device = {
> + .probe = &labx_audio_packetizer_probe,
> + .pass = 1,
> + .compat = (const char * []) { "labx,labx_audio_packetizer-1.0", NULL }
> +};
> +
> +/*
> + * LabX audio depacketizer device
> + */
> +static void labx_audio_depacketizer_probe(void *fdt, int node, uint32_t
> offset)
> +{
> + uint32_t depacketizer_addr = fdt_get_int_from_array(fdt, node, "reg", 0)
> +
> + offset;
> + uint32_t depacketizer_irq =
> + fdt_get_int_from_array(fdt, node, "interrupts", 0);
> + uint32_t clock_domains =
> + fdt_get_int_from_array(fdt, node, "labx,num-clock-domains", 0);
> + uint32_t cache_words =
> + fdt_get_int_from_array(fdt, node, "labx,cache-data-words", 0);
> +
> + int ifLen;
No CamelCase
> + const void *ifType =
> + qemu_devtree_getprop_offset(fdt, node, "labx,interface-type",
> &ifLen);
> + int hasDMA = (0 != strncmp("CACHE_RAM", (const char *)ifType, ifLen));
> +
> + labx_audio_depacketizer_create(depacketizer_addr, irq[depacketizer_irq],
> + clock_domains, cache_words, hasDMA);
> +}
> +
> +devinfo_t labx_audio_depacketizer_device = {
> + .probe = &labx_audio_depacketizer_probe,
> + .pass = 1,
> + .compat = (const char * []) {
> + "labx,labx-audio-depacketizer-1.00.a",
> + "labx,labx-audio-depacketizer-1.01.a",
> + NULL
> + }
> +};
> +
> +/*
> + * LabX dma device
> + */
> +static void labx_dma_probe(void *fdt, int node, uint32_t offset)
> +{
> + uint32_t dma_addr = fdt_get_int_from_array(fdt, node, "reg", 0) + offset;
> +
> + labx_dma_create(dma_addr, 1024);
> +}
> +
> +devinfo_t labx_dma_device = {
> + .probe = &labx_dma_probe,
> + .pass = 1,
> + .compat = (const char * []) { "labx,labx_dma-1.0", NULL }
> +};
> +
> +/*
> + * LabX ethernet device
> + */
> +static void labx_ethernet_probe(void *fdt, int node, uint32_t offset)
> +{
> + uint32_t ethernet_addr = fdt_get_int_from_array(fdt, node, "reg", 0) +
> + offset;
> + uint32_t host_irq =
> + fdt_get_int_from_array(fdt, node, "interrupts", 0);
> + uint32_t fifo_irq = 0; /*
> + fdt_get_int_from_array(fdt, node, "interrupts", 2); */
> + uint32_t phy_irq = 0; /*
> + fdt_get_int_from_array(fdt, node, "interrupts", 4); */
> +
> + labx_ethernet_create(&nd_table[++eth_dev_index], ethernet_addr,
> + irq[host_irq], irq[fifo_irq], irq[phy_irq]);
> +}
> +
> +devinfo_t labx_ethernet_device = {
> + .probe = &labx_ethernet_probe,
> + .pass = 1,
> + .compat = (const char * []) { "labx,labx_ethernet-1.0", NULL }
> +};
> +
> +/*
> + * LabX ptp device
> + */
> +static void labx_ptp_probe(void *fdt, int node, uint32_t offset)
> +{
> + uint32_t ptp_addr = fdt_get_int_from_array(fdt, node, "reg", 0) + offset;
> +
> + labx_ptp_create(ptp_addr);
> +}
> +
> +devinfo_t labx_ptp_device = {
> + .probe = &labx_ptp_probe,
> + .pass = 1,
> + .compat = (const char * []) { "labx,labx_ptp-1.0", NULL }
> +};
> +
> +/*
> + * Altera uart device
> + */
> +static void altera_uart_probe(void *fdt, int node, uint32_t offset)
> +{
> + uint32_t uart_addr = fdt_get_int_from_array(fdt, node, "reg", 0) +
> offset;
> + uint32_t uart_irq = fdt_get_int_from_array(fdt, node, "interrupts", 0);
> +
> + printf(" UART BASE %08X IRQ %d\n", uart_addr, uart_irq);
> +
> + sysbus_create_simple("altera,uart", uart_addr, irq[uart_irq]);
> +}
> +
> +devinfo_t altera_uart_device = {
> + .probe = &altera_uart_probe,
> + .pass = 1,
> + .compat = (const char * []) { "ALTR,uart-1.0", NULL }
> +};
> +
> +/*
> + * Altera timer device
> + */
> +static void altera_timer_probe(void *fdt, int node, uint32_t offset)
> +{
> + uint32_t timer_addr = fdt_get_int_from_array(fdt, node, "reg", 0) +
> offset;
> + uint32_t timer_irq = fdt_get_int_from_array(fdt, node, "interrupts", 0);
> + uint32_t timer_freq =
> + fdt_get_int_from_array(fdt, node, "clock-frequency", 0);
> +
> + printf(" TIMER BASE %08X IRQ %d FREQUENCY %d\n",
> + timer_addr, timer_irq, timer_freq);
> +
> + altera_timer_create(timer_addr, irq[timer_irq], timer_freq);
> +}
> +
> +devinfo_t altera_timer_device = {
> + .probe = &altera_timer_probe,
> + .pass = 1,
> + .compat = (const char * []) { "ALTR,timer-1.0", NULL }
> +};
> +
> +/*
> + * Altera clock domain crossing bridge
> + */
> +static void altera_bridge_probe(void *fdt, int node, uint32_t offset)
> +{
> + uint32_t bridge_addr = fdt_get_int_from_array(fdt, node, "reg", 0) +
> offset;
> +
> + printf(" BRIDGE %08X\n", bridge_addr);
> +
> + /* Do multiple passes through the devices. Some have dependencies
> + on others being first */
> + int pass = 0;
Variable declarations must be before code statements.
> + int again = 0;
bool
> + do {
> + int child = node;
> + again = 0;
> + do {
> + child = qemu_devtree_next_child_offset(fdt, node, child);
> + if (child < 0) {
> + break;
> + }
> +
> + again |= sopc_device_probe(fdt, child, pass, bridge_addr);
> +
> + } while (1);
> +
> + pass++;
> +
> + } while (again);
> +}
> +
> +devinfo_t altera_bridge_device = {
> + .probe = &altera_bridge_probe,
> + .pass = 1,
> + .compat = (const char * []) { "simple-bus", NULL }
> +};
> +
> +/*
> + * Table of available devices
> + */
> +devinfo_t *devices[] = {
> + &cpu_device,
> + &flash_device,
> + &labx_audio_packetizer_device,
> + &labx_audio_depacketizer_device,
> + &labx_dma_device,
> + &labx_ethernet_device,
> + &labx_ptp_device,
> + &altera_uart_device,
> + &altera_timer_device,
> + &altera_bridge_device,
> + NULL
> +};
> +
> +static int sopc_device_probe(void *fdt, int node, int pass, uint32_t offset)
> +{
> + devinfo_t **dev = &(devices[0]);
> +
> + while (*dev) {
You could drop the NULL and use indexing up to ARRAY_SIZE instead.
> + const char **compat = &((*dev)->compat[0]);
> + while (*compat) {
> + if (0 == qemu_devtree_node_check_compatible(fdt, node, *compat))
> {
> + if (pass == (*dev)->pass) {
> + printf("Adding a device for node %s\n",
> + qemu_devtree_get_name(fdt, node, NULL));
> +
> + (*dev)->probe(fdt, node, offset);
> + return 0;
> + }
> +
> + if (pass < (*dev)->pass) {
> + /* Probe again on the next pass */
> + return 1;
> + }
> + }
> +
> + compat++;
> + }
> +
> + dev++;
> + }
> +
> + return 0;
> +}
> +
> +static void cpus_probe(void *fdt)
> +{
> + int root = qemu_devtree_node_offset(fdt, "/");
> + int cpus = qemu_devtree_subnode_offset_namelen(fdt, root, "cpus", 4);
> + if (cpus > 0) {
> + int child = cpus;
> + do {
> + child = qemu_devtree_next_child_offset(fdt, cpus, child);
> + if (child < 0) {
> + break;
> + }
> +
> + sopc_device_probe(fdt, child, 0, 0xE0000000);
> + } while (1);
> + }
> +}
> +
> +static void sopc_bus_probe(void *fdt)
> +{
> + int root = qemu_devtree_node_offset(fdt, "/");
> + int sopc = qemu_devtree_subnode_offset_namelen(fdt, root, "sopc", 4);
> + if (sopc > 0) {
> + /* Do multiple passes through the devices. Some have dependencies
> + on others being first */
> + int pass = 0;
> + int again = 0;
bool
> + do {
> + int child = sopc;
> + again = 0;
> + do {
> + child = qemu_devtree_next_child_offset(fdt, sopc, child);
> + if (child < 0) {
> + break;
> + }
> +
> + again |= sopc_device_probe(fdt, child, pass, 0xE0000000);
> +
> + } while (1);
> +
> + pass++;
> +
> + } while (again);
> + }
> +}
> +
> +static void
> +labx_nios2_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)
> +{
> + MemoryRegion *address_space_mem = get_system_memory();
> +
> + int kernel_size;
> + int fdt_size;
> + void *fdt = get_device_tree(&fdt_size);
> + target_phys_addr_t ddr_base = get_dram_base(fdt);
> + MemoryRegion *phys_lmb_bram = g_new(MemoryRegion, 1);
> + MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
> + MemoryRegion *phys_ram_alias = g_new(MemoryRegion, 1);
> +
> + /* init CPUs */
> + if (cpu_model == NULL) {
> + cpu_model = "nios2";
> + }
> + g_cpu = cpu_nios2_init(cpu_model);
> +
> + qemu_register_reset(main_cpu_reset, g_cpu);
> +
> + /* Attach emulated BRAM through the LMB. LMB size is not specified
> + in the device-tree but there must be one to hold the vector table. */
> + memory_region_init_ram(phys_lmb_bram, "nios2.lmb_bram", LMB_BRAM_SIZE);
> + vmstate_register_ram_global(phys_lmb_bram);
> + memory_region_add_subregion(address_space_mem, 0x00000000,
> phys_lmb_bram);
> +
> + memory_region_init_ram(phys_ram, "nios2.ram", ram_size);
> + vmstate_register_ram_global(phys_ram);
> + memory_region_add_subregion(address_space_mem, ddr_base, phys_ram);
> + memory_region_init_alias(phys_ram_alias, "nios2.ram.mirror",
> + phys_ram, 0, ram_size);
> + memory_region_add_subregion(address_space_mem, ddr_base + 0xc0000000,
> + phys_ram_alias);
> +
> + /* Create cpus listed in the device-tree */
> + cpus_probe(fdt);
> +
> + /* Create other devices listed in the device-tree */
> + sopc_bus_probe(fdt);
> +
> + if (kernel_filename) {
> + uint64_t entry = 0, low = 0, high = 0;
> + uint32_t base32 = 0;
> +
> + /* Boots a kernel elf binary. */
> + kernel_size = load_elf(kernel_filename, NULL, NULL,
> + &entry, &low, &high,
> + 0, ELF_MACHINE, 0);
> + base32 = entry;
> + if (base32 == 0xc0000000) {
> + kernel_size = load_elf(kernel_filename, translate_kernel_address,
> + NULL, &entry, NULL, NULL,
> + 0, ELF_MACHINE, 0);
> + }
> + /* Always boot into physical ram. */
> + boot_info.bootstrap_pc = ddr_base + 0xc0000000 + (entry &
> 0x07ffffff);
> +
> + /* If it wasn't an ELF image, try an u-boot image. */
> + if (kernel_size < 0) {
> + target_phys_addr_t uentry, loadaddr;
> +
> + kernel_size = load_uimage(kernel_filename, &uentry, &loadaddr,
> 0);
> + boot_info.bootstrap_pc = uentry;
> + high = (loadaddr + kernel_size + 3) & ~3;
> + }
> +
> + /* Not an ELF image nor an u-boot image, try a RAW image. */
> + if (kernel_size < 0) {
> + kernel_size = load_image_targphys(kernel_filename, ddr_base,
> + ram_size);
> + boot_info.bootstrap_pc = ddr_base;
> + high = (ddr_base + kernel_size + 3) & ~3;
> + }
> +
> + if (initrd_filename) {
> + uint32_t initrd_base = 0x88c00000;
> + uint32_t initrd_size =
> + load_image_targphys(initrd_filename, initrd_base,
> + ram_size - initrd_base);
> + if (initrd_size <= 0) {
initrd_size is unsigned, the test will only catch 0 case.
> + fprintf(stderr, "qemu: could not load initial ram disk
> '%s'\n",
> + initrd_filename);
> + exit(1);
> + }
> +
> + boot_info.initrd = initrd_base;
> + } else {
> + boot_info.initrd = 0x00000000;
> + }
> +
> + boot_info.cmdline = high + 4096;
> + if (kernel_cmdline && strlen(kernel_cmdline)) {
> + pstrcpy_targphys("cmdline", boot_info.cmdline, 256,
> kernel_cmdline);
> + }
> + /* Provide a device-tree. */
> + boot_info.fdt = boot_info.cmdline + 4096;
> + labx_load_device_tree(boot_info.fdt, ram_size,
> + 0, 0,
> + kernel_cmdline);
> + }
> +}
> +
> +static QEMUMachine labx_nios2_machine = {
> + .name = "labx-nios2-devicetree",
> + .desc = "Nios II design based on the peripherals specified "
> + "in the device-tree.",
> + .init = labx_nios2_init,
> + .is_default = 1
> +};
> +
> +static void labx_nios2_machine_init(void)
> +{
> + qemu_register_machine(&labx_nios2_machine);
> +}
> +
> +machine_init(labx_nios2_machine_init);
> +
zap newline
> diff --git a/hw/nios2/Makefile.objs b/hw/nios2/Makefile.objs
> new file mode 100644
> index 0000000..33cdd9b
> --- /dev/null
> +++ b/hw/nios2/Makefile.objs
> @@ -0,0 +1,6 @@
> +obj-y = labx_nios2_devicetree.o
> +
> +obj-y += nios2_pic_cpu.o
> +obj-$(CONFIG_FDT) += ../device_tree.o
> +
> +obj-y := $(addprefix ../,$(obj-y))
> --
> 1.7.9.5
>
>
