Re: [Qemu-devel] [PATCH v6 09/18] i8259: Factor out base class for KVM reuse

[Anthony Liguori <aliguori@us.ibm.com>]

On 01/13/2012 11:35 AM, Jan Kiszka wrote:
> Analogously to the APIC, we will reuse some parts of the user space
> i8259 model for KVM. In this case it is a common device state, a common
> vmstate, the property list, a reset core and some init bits.
>
> This also introduces a common helper to instantiate a single i8259 chip
> from the cascade-creating i8259_init function.
>
> Signed-off-by: Jan Kiszka<jan.kiszka@siemens.com>
> ---
> diff --git a/hw/i8259_internal.h b/hw/i8259_internal.h
> new file mode 100644
> index 0000000..aedd55f
> --- /dev/null
> +++ b/hw/i8259_internal.h
> @@ -0,0 +1,76 @@
> +/*
> + * QEMU 8259 - internal interfaces
> + *
> + * Copyright (c) 2011 Jan Kiszka, Siemens AG
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a copy
> + * of this software and associated documentation files (the "Software"), to deal
> + * in the Software without restriction, including without limitation the rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + */
> +
> +#ifndef QEMU_I8259_INTERNAL_H
> +#define QEMU_I8259_INTERNAL_H
> +
> +#include "hw.h"
> +#include "pc.h"
> +#include "isa.h"
> +
> +typedef struct PICCommonState PICCommonState;
> +
> +struct PICCommonState {
> +    ISADevice dev;
> +    uint8_t last_irr; /* edge detection */
> +    uint8_t irr; /* interrupt request register */
> +    uint8_t imr; /* interrupt mask register */
> +    uint8_t isr; /* interrupt service register */
> +    uint8_t priority_add; /* highest irq priority */
> +    uint8_t irq_base;
> +    uint8_t read_reg_select;
> +    uint8_t poll;
> +    uint8_t special_mask;
> +    uint8_t init_state;
> +    uint8_t auto_eoi;
> +    uint8_t rotate_on_auto_eoi;
> +    uint8_t special_fully_nested_mode;
> +    uint8_t init4; /* true if 4 byte init */
> +    uint8_t single_mode; /* true if slave pic is not initialized */
> +    uint8_t elcr; /* PIIX edge/trigger selection*/
> +    uint8_t elcr_mask;
> +    qemu_irq int_out[1];
> +    uint32_t master; /* reflects /SP input pin */
> +    uint32_t iobase;
> +    uint32_t elcr_addr;
> +    MemoryRegion base_io;
> +    MemoryRegion elcr_io;
> +};
> +
> +#define PIC_VMSTATE_VERSION 1
> +
> +extern const VMStateDescription vmstate_pic_common;
> +
> +#define PIC_PROPERTIES_COMMON(cont_type, cont_var)                      \
> +    DEFINE_PROP_HEX32("iobase", cont_type, cont_var.iobase,  -1),       \
> +    DEFINE_PROP_HEX32("elcr_addr", cont_type, cont_var.elcr_addr,  -1), \
> +    DEFINE_PROP_HEX8("elcr_mask", cont_type, cont_var.elcr_mask,  -1),  \
> +    DEFINE_PROP_BIT("master", cont_type, cont_var.master,  0, false)
> +
> +void pic_init_common(PICCommonState *s);
> +void pic_reset_common(PICCommonState *s);
> +
> +ISADevice *i8259_init_chip(const char *name, ISABus *bus, bool master);

Same feedback here re: i8259_qdev_register().

Regards,

Anthony Liguori

> +#endif /* !QEMU_I8259_INTERNAL_H */