Re: [Qemu-devel] [PATCH v4 06/32] target-xtensa: add sample board

[Blue Swirl]

On Thu, Sep 1, 2011 at 8:45 PM, Max Filippov <address@hidden> wrote:
> Sample board and sample CPU core are used for debug and may be used for
> development of custom SoC emulators.
>
> This board has two fixed size memory regions for DTCM and ITCM and
> variable length SRAM region.
>
> Signed-off-by: Max Filippov <address@hidden>
> ---
>  Makefile.target    |    1 +
>  hw/xtensa_sample.c |  105 
> ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 106 insertions(+), 0 deletions(-)
>  create mode 100644 hw/xtensa_sample.c
>
> diff --git a/Makefile.target b/Makefile.target
> index b833c10..98455e3 100644
> --- a/Makefile.target
> +++ b/Makefile.target
> @@ -374,6 +374,7 @@ obj-alpha-y = i8259.o mc146818rtc.o
>  obj-alpha-y += vga.o cirrus_vga.o
>
>  obj-xtensa-y += xtensa_pic.o
> +obj-xtensa-y += xtensa_sample.o
>
>  main.o: QEMU_CFLAGS+=$(GPROF_CFLAGS)
>
> diff --git a/hw/xtensa_sample.c b/hw/xtensa_sample.c
> new file mode 100644
> index 0000000..9f7733b
> --- /dev/null
> +++ b/hw/xtensa_sample.c
> @@ -0,0 +1,105 @@
> +/*
> + * 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"
> +
> +static void xtensa_sample_reset(void *env)
> +{
> +    cpu_reset(env);
> +}
> +
> +static void xtensa_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)
> +{
> +    CPUState *env = NULL;
> +    ram_addr_t ram_offset;
> +    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);
> +        }
> +        qemu_register_reset(xtensa_sample_reset, env);
> +    }
> +
> +    ram_offset = qemu_ram_alloc(NULL, "xtensa.dram", 0x10000);
> +    cpu_register_physical_memory(0x5ffd0000, 0x10000, ram_offset);
> +
> +    ram_offset = qemu_ram_alloc(NULL, "xtensa.iram", 0x20000);
> +    cpu_register_physical_memory(0x5ffe0000, 0x20000, ram_offset);
> +
> +    ram_offset = qemu_ram_alloc(NULL, "xtensa.sram", ram_size);
> +    cpu_register_physical_memory(0x60000000, ram_size, ram_offset);

These should be converted to the new memory API. Please see pc.c for reference.

> +
> +    if (kernel_filename) {
> +        uint64_t elf_entry;
> +        uint64_t elf_lowaddr;
> +#ifdef TARGET_WORDS_BIGENDIAN
> +        int success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
> +                &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
> +#else
> +        int success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
> +                &elf_lowaddr, NULL, 0, ELF_MACHINE, 0);
> +#endif
> +        if (success > 0) {
> +            env->pc = elf_entry;
> +        }
> +    }
> +}
> +
> +static void xtensa_sample_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 = "sample-xtensa-core";
> +    }
> +    xtensa_init(ram_size, boot_device, kernel_filename, kernel_cmdline,
> +                  initrd_filename, cpu_model);
> +}
> +
> +static QEMUMachine xtensa_sample_machine = {
> +    .name = "sample-xtensa-machine",
> +    .desc = "Sample Xtensa machine (sample Xtensa core)",
> +    .init = xtensa_sample_init,
> +    .max_cpus = 4,
> +};
> +
> +static void xtensa_sample_machine_init(void)
> +{
> +    qemu_register_machine(&xtensa_sample_machine);
> +}
> +
> +machine_init(xtensa_sample_machine_init);
> --
> 1.7.6
>
>
>