Re: [Qemu-devel] [Qemu-arm] [PATCH v3 1/7] hw/arm: rename armv7m_load_kernel()

["Philippe Mathieu-Daudé" <f4bug@amsat.org>]

On 07/25/2018 05:59 AM, Stefan Hajnoczi wrote:
> ARMv6-M and ARMv8-M need the same kernel loading functionality as
> ARMv7-M.  Rename armv7m_load_kernel() to arm_m_profile_load_kernel() so
> it's clear that this function isn't specific to ARMv7-M.
> 
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> ---
>  hw/arm/Makefile.objs            |  1 +
>  include/hw/arm/arm.h            | 11 +++--
>  hw/arm/arm-m-profile.c          | 81 +++++++++++++++++++++++++++++++++
>  hw/arm/armv7m.c                 | 60 ------------------------
>  hw/arm/mps2-tz.c                |  3 +-
>  hw/arm/mps2.c                   |  4 +-
>  hw/arm/msf2-som.c               |  4 +-
>  hw/arm/netduino2.c              |  4 +-
>  hw/arm/stellaris.c              |  3 +-
>  default-configs/arm-softmmu.mak |  1 +
>  10 files changed, 99 insertions(+), 73 deletions(-)
>  create mode 100644 hw/arm/arm-m-profile.c
> 
> diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
> index d51fcecaf2..2c43d34c64 100644
> --- a/hw/arm/Makefile.objs
> +++ b/hw/arm/Makefile.objs
> @@ -16,6 +16,7 @@ obj-$(CONFIG_STRONGARM) += collie.o
>  obj-$(CONFIG_VERSATILE) += vexpress.o versatilepb.o
>  obj-$(CONFIG_ZYNQ) += xilinx_zynq.o
>  
> +obj-$(CONFIG_ARM_M_PROFILE) += arm-m-profile.o
>  obj-$(CONFIG_ARM_V7M) += armv7m.o
>  obj-$(CONFIG_EXYNOS4) += exynos4210.o
>  obj-$(CONFIG_PXA2XX) += pxa2xx.o pxa2xx_gpio.o pxa2xx_pic.o
> diff --git a/include/hw/arm/arm.h b/include/hw/arm/arm.h
> index ffed39252d..2b919e57ee 100644
> --- a/include/hw/arm/arm.h
> +++ b/include/hw/arm/arm.h
> @@ -24,16 +24,17 @@ typedef enum {
>  } arm_endianness;
>  
>  /**
> - * armv7m_load_kernel:
> + * arm_m_profile_load_kernel:
>   * @cpu: CPU
>   * @kernel_filename: file to load
> - * @mem_size: mem_size: maximum image size to load
> + * @mem_size: maximum image size to load
>   *
> - * Load the guest image for an ARMv7M system. This must be called by
> - * any ARMv7M board. (This is necessary to ensure that the CPU resets
> + * Load the guest image for an ARM M Profile system. This must be called by
> + * any ARM M Profile board. (This is necessary to ensure that the CPU resets
>   * correctly on system reset, as well as for kernel loading.)
>   */
> -void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size);
> +void arm_m_profile_load_kernel(ARMCPU *cpu, const char *kernel_filename,
> +                               int mem_size);
>  
>  /* arm_boot.c */
>  struct arm_boot_info {
> diff --git a/hw/arm/arm-m-profile.c b/hw/arm/arm-m-profile.c
> new file mode 100644
> index 0000000000..262706ed62
> --- /dev/null
> +++ b/hw/arm/arm-m-profile.c
> @@ -0,0 +1,81 @@
> +/*
> + * ARM M Profile System emulation.
> + *
> + * Copyright (C) 2018 Red Hat, Inc.
> + *
> + * Copyright (c) 2006-2007 CodeSourcery.
> + * Written by Paul Brook
> + *
> + * This code is licensed under the GPL.
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu-common.h"
> +#include "cpu.h"
> +#include "hw/sysbus.h"
> +#include "hw/arm/arm.h"
> +#include "hw/loader.h"
> +#include "elf.h"
> +#include "sysemu/qtest.h"
> +#include "qemu/error-report.h"
> +#include "exec/address-spaces.h"
> +
> +static void arm_m_profile_reset(void *opaque)
> +{
> +    ARMCPU *cpu = opaque;
> +
> +    cpu_reset(CPU(cpu));
> +}
> +
> +void arm_m_profile_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size)
> +{
> +    int image_size;
> +    uint64_t entry;
> +    uint64_t lowaddr;
> +    int big_endian;
> +    AddressSpace *as;
> +    int asidx;
> +    CPUState *cs = CPU(cpu);
> +
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    big_endian = 1;
> +#else
> +    big_endian = 0;
> +#endif
> +
> +    if (!kernel_filename && !qtest_enabled()) {
> +        error_report("Guest image must be specified (using -kernel)");
> +        exit(1);
> +    }
> +
> +    if (arm_feature(&cpu->env, ARM_FEATURE_EL3)) {
> +        asidx = ARMASIdx_S;
> +    } else {
> +        asidx = ARMASIdx_NS;
> +    }
> +    as = cpu_get_address_space(cs, asidx);
> +
> +    if (kernel_filename) {
> +        image_size = load_elf_as(kernel_filename, NULL, NULL, &entry, &lowaddr,
> +                                 NULL, big_endian, EM_ARM, 1, 0, as);
> +        if (image_size < 0) {
> +            image_size = load_image_targphys_as(kernel_filename, 0,
> +                                                mem_size, as);
> +            lowaddr = 0;
> +        }
> +        if (image_size < 0) {
> +            error_report("Could not load kernel '%s'", kernel_filename);
> +            exit(1);
> +        }
> +    }
> +
> +    /* CPU objects (unlike devices) are not automatically reset on system
> +     * reset, so we must always register a handler to do so. Unlike
> +     * A-profile CPUs, we don't need to do anything special in the
> +     * handler to arrange that it starts correctly.
> +     * This is arguably the wrong place to do this, but it matches the
> +     * way A-profile does it. Note that this means that every M profile
> +     * board must call this function!
> +     */
> +    qemu_register_reset(arm_m_profile_reset, cpu);
> +}
> diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
> index 6b07666057..7405a1ec69 100644
> --- a/hw/arm/armv7m.c
> +++ b/hw/arm/armv7m.c
> @@ -258,66 +258,6 @@ static const TypeInfo armv7m_info = {
>      .class_init = armv7m_class_init,
>  };
>  
> -static void armv7m_reset(void *opaque)
> -{
> -    ARMCPU *cpu = opaque;
> -
> -    cpu_reset(CPU(cpu));
> -}
> -
> -void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size)
> -{
> -    int image_size;
> -    uint64_t entry;
> -    uint64_t lowaddr;
> -    int big_endian;
> -    AddressSpace *as;
> -    int asidx;
> -    CPUState *cs = CPU(cpu);
> -
> -#ifdef TARGET_WORDS_BIGENDIAN
> -    big_endian = 1;
> -#else
> -    big_endian = 0;
> -#endif
> -
> -    if (!kernel_filename && !qtest_enabled()) {
> -        error_report("Guest image must be specified (using -kernel)");
> -        exit(1);
> -    }
> -
> -    if (arm_feature(&cpu->env, ARM_FEATURE_EL3)) {
> -        asidx = ARMASIdx_S;
> -    } else {
> -        asidx = ARMASIdx_NS;
> -    }
> -    as = cpu_get_address_space(cs, asidx);
> -
> -    if (kernel_filename) {
> -        image_size = load_elf_as(kernel_filename, NULL, NULL, &entry, &lowaddr,
> -                                 NULL, big_endian, EM_ARM, 1, 0, as);
> -        if (image_size < 0) {
> -            image_size = load_image_targphys_as(kernel_filename, 0,
> -                                                mem_size, as);
> -            lowaddr = 0;
> -        }
> -        if (image_size < 0) {
> -            error_report("Could not load kernel '%s'", kernel_filename);
> -            exit(1);
> -        }
> -    }
> -
> -    /* CPU objects (unlike devices) are not automatically reset on system
> -     * reset, so we must always register a handler to do so. Unlike
> -     * A-profile CPUs, we don't need to do anything special in the
> -     * handler to arrange that it starts correctly.
> -     * This is arguably the wrong place to do this, but it matches the
> -     * way A-profile does it. Note that this means that every M profile
> -     * board must call this function!
> -     */
> -    qemu_register_reset(armv7m_reset, cpu);
> -}
> -
>  static Property bitband_properties[] = {
>      DEFINE_PROP_UINT32("base", BitBandState, base, 0),
>      DEFINE_PROP_LINK("source-memory", BitBandState, source_memory,
> diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
> index 22180c56fb..af10ee0cc9 100644
> --- a/hw/arm/mps2-tz.c
> +++ b/hw/arm/mps2-tz.c
> @@ -487,7 +487,8 @@ static void mps2tz_common_init(MachineState *machine)
>  
>      create_unimplemented_device("FPGA NS PC", 0x48007000, 0x1000);
>  
> -    armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename, 0x400000);
> +    arm_m_profile_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> +                              0x400000);
>  }
>  
>  static void mps2tz_class_init(ObjectClass *oc, void *data)
> diff --git a/hw/arm/mps2.c b/hw/arm/mps2.c
> index c3946da317..bcc7070104 100644
> --- a/hw/arm/mps2.c
> +++ b/hw/arm/mps2.c
> @@ -315,8 +315,8 @@ static void mps2_common_init(MachineState *machine)
>  
>      system_clock_scale = NANOSECONDS_PER_SECOND / SYSCLK_FRQ;
>  
> -    armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> -                       0x400000);
> +    arm_m_profile_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> +                              0x400000);
>  }
>  
>  static void mps2_class_init(ObjectClass *oc, void *data)
> diff --git a/hw/arm/msf2-som.c b/hw/arm/msf2-som.c
> index 2432b5e935..cb21ced472 100644
> --- a/hw/arm/msf2-som.c
> +++ b/hw/arm/msf2-som.c
> @@ -91,8 +91,8 @@ static void emcraft_sf2_s2s010_init(MachineState *machine)
>      cs_line = qdev_get_gpio_in_named(spi_flash, SSI_GPIO_CS, 0);
>      sysbus_connect_irq(SYS_BUS_DEVICE(&soc->spi[0]), 1, cs_line);
>  
> -    armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> -                       soc->envm_size);
> +    arm_m_profile_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> +                              soc->envm_size);
>  }
>  
>  static void emcraft_sf2_machine_init(MachineClass *mc)
> diff --git a/hw/arm/netduino2.c b/hw/arm/netduino2.c
> index f936017d4a..e18d377f94 100644
> --- a/hw/arm/netduino2.c
> +++ b/hw/arm/netduino2.c
> @@ -37,8 +37,8 @@ static void netduino2_init(MachineState *machine)
>      qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
>      object_property_set_bool(OBJECT(dev), true, "realized", &error_fatal);
>  
> -    armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> -                       FLASH_SIZE);
> +    arm_m_profile_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
> +                              FLASH_SIZE);
>  }
>  
>  static void netduino2_machine_init(MachineClass *mc)
> diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c
> index dc521b4a5a..68e52367c0 100644
> --- a/hw/arm/stellaris.c
> +++ b/hw/arm/stellaris.c
> @@ -1440,7 +1440,8 @@ static void stellaris_init(MachineState *ms, stellaris_board_info *board)
>      create_unimplemented_device("hibernation", 0x400fc000, 0x1000);
>      create_unimplemented_device("flash-control", 0x400fd000, 0x1000);
>  
> -    armv7m_load_kernel(ARM_CPU(first_cpu), ms->kernel_filename, flash_size);
> +    arm_m_profile_load_kernel(ARM_CPU(first_cpu), ms->kernel_filename,
> +                              flash_size);
>  }
>  
>  /* FIXME: Figure out how to generate these from stellaris_boards.  */
> diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
> index 834d45cfaf..e704cb6e34 100644
> --- a/default-configs/arm-softmmu.mak
> +++ b/default-configs/arm-softmmu.mak
> @@ -48,6 +48,7 @@ CONFIG_ARM11MPCORE=y
>  CONFIG_A9MPCORE=y
>  CONFIG_A15MPCORE=y
>  
> +CONFIG_ARM_M_PROFILE=y
>  CONFIG_ARM_V7M=y
>  CONFIG_NETDUINO2=y
>  
>