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Re: [PATCH V17 2/6] hw/intc: Rework Loongson LIOINTC


From: Philippe Mathieu-Daudé
Subject: Re: [PATCH V17 2/6] hw/intc: Rework Loongson LIOINTC
Date: Mon, 23 Nov 2020 21:52:11 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0

On 11/6/20 5:21 AM, Huacai Chen wrote:
> As suggested by Philippe Mathieu-Daudé, rework Loongson's liointc:
> 1, Move macro definitions to loongson_liointc.h;
> 2, Remove magic values and use macros instead;
> 3, Replace dead D() code by trace events.
> 
> Suggested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> Signed-off-by: Huacai Chen <chenhc@lemote.com>
> ---
>  hw/intc/loongson_liointc.c         | 49 
> +++++++++++---------------------------
>  include/hw/intc/loongson_liointc.h | 39 ++++++++++++++++++++++++++++++
>  2 files changed, 53 insertions(+), 35 deletions(-)
>  create mode 100644 include/hw/intc/loongson_liointc.h
> 
> diff --git a/hw/intc/loongson_liointc.c b/hw/intc/loongson_liointc.c
> index fbbfb57..be29e2f 100644
> --- a/hw/intc/loongson_liointc.c
> +++ b/hw/intc/loongson_liointc.c
> @@ -1,6 +1,7 @@
>  /*
>   * QEMU Loongson Local I/O interrupt controler.
>   *
> + * Copyright (c) 2020 Huacai Chen <chenhc@lemote.com>
>   * Copyright (c) 2020 Jiaxun Yang <jiaxun.yang@flygoat.com>
>   *
>   * This program is free software: you can redistribute it and/or modify
> @@ -19,33 +20,11 @@
>   */
>  
>  #include "qemu/osdep.h"
> -#include "hw/sysbus.h"
>  #include "qemu/module.h"
> +#include "qemu/log.h"
>  #include "hw/irq.h"
>  #include "hw/qdev-properties.h"
> -#include "qom/object.h"
> -
> -#define D(x)
> -
> -#define NUM_IRQS                32
> -
> -#define NUM_CORES               4
> -#define NUM_IPS                 4
> -#define NUM_PARENTS             (NUM_CORES * NUM_IPS)
> -#define PARENT_COREx_IPy(x, y)  (NUM_IPS * x + y)
> -
> -#define R_MAPPER_START          0x0
> -#define R_MAPPER_END            0x20
> -#define R_ISR                   R_MAPPER_END
> -#define R_IEN                   0x24
> -#define R_IEN_SET               0x28
> -#define R_IEN_CLR               0x2c
> -#define R_PERCORE_ISR(x)        (0x40 + 0x8 * x)
> -#define R_END                   0x64
> -
> -#define TYPE_LOONGSON_LIOINTC "loongson.liointc"
> -DECLARE_INSTANCE_CHECKER(struct loongson_liointc, LOONGSON_LIOINTC,
> -                         TYPE_LOONGSON_LIOINTC)
> +#include "hw/intc/loongson_liointc.h"
>  
>  struct loongson_liointc {
>      SysBusDevice parent_obj;
> @@ -123,14 +102,13 @@ liointc_read(void *opaque, hwaddr addr, unsigned int 
> size)
>          goto out;
>      }
>  
> -    /* Rest is 4 byte */
> +    /* Rest are 4 bytes */
>      if (size != 4 || (addr % 4)) {
>          goto out;
>      }
>  
> -    if (addr >= R_PERCORE_ISR(0) &&
> -        addr < R_PERCORE_ISR(NUM_CORES)) {
> -        int core = (addr - R_PERCORE_ISR(0)) / 8;
> +    if (addr >= R_START && addr < R_END) {
> +        int core = (addr - R_START) / R_ISR_SIZE;
>          r = p->per_core_isr[core];
>          goto out;
>      }
> @@ -147,7 +125,8 @@ liointc_read(void *opaque, hwaddr addr, unsigned int size)
>      }
>  
>  out:
> -    D(qemu_log("%s: size=%d addr=%lx val=%x\n", __func__, size, addr, r));
> +    qemu_log_mask(CPU_LOG_INT, "%s: size=%d addr=%lx val=%x\n",
> +                  __func__, size, addr, r);
>      return r;
>  }
>  
> @@ -158,7 +137,8 @@ liointc_write(void *opaque, hwaddr addr,
>      struct loongson_liointc *p = opaque;
>      uint32_t value = val64;
>  
> -    D(qemu_log("%s: size=%d, addr=%lx val=%x\n", __func__, size, addr, 
> value));
> +    qemu_log_mask(CPU_LOG_INT, "%s: size=%d, addr=%lx val=%x\n",
> +                  __func__, size, addr, value);
>  
>      /* Mapper is 1 byte */
>      if (size == 1 && addr < R_MAPPER_END) {
> @@ -166,14 +146,13 @@ liointc_write(void *opaque, hwaddr addr,
>          goto out;
>      }
>  
> -    /* Rest is 4 byte */
> +    /* Rest are 4 bytes */
>      if (size != 4 || (addr % 4)) {
>          goto out;
>      }
>  
> -    if (addr >= R_PERCORE_ISR(0) &&
> -        addr < R_PERCORE_ISR(NUM_CORES)) {
> -        int core = (addr - R_PERCORE_ISR(0)) / 8;
> +    if (addr >= R_START && addr < R_END) {
> +        int core = (addr - R_START) / R_ISR_SIZE;
>          p->per_core_isr[core] = value;
>          goto out;
>      }
> @@ -224,7 +203,7 @@ static void loongson_liointc_init(Object *obj)
>      }
>  
>      memory_region_init_io(&p->mmio, obj, &pic_ops, p,
> -                         "loongson.liointc", R_END);
> +                         TYPE_LOONGSON_LIOINTC, R_END);
>      sysbus_init_mmio(SYS_BUS_DEVICE(obj), &p->mmio);
>  }
>  
> diff --git a/include/hw/intc/loongson_liointc.h 
> b/include/hw/intc/loongson_liointc.h
> new file mode 100644
> index 0000000..e11f482
> --- /dev/null
> +++ b/include/hw/intc/loongson_liointc.h
> @@ -0,0 +1,39 @@
> +/*
> + * This file is subject to the terms and conditions of the GNU General Public
> + * License.  See the file "COPYING" in the main directory of this archive
> + * for more details.
> + *
> + * Copyright (c) 2020 Huacai Chen <chenhc@lemote.com>
> + * Copyright (c) 2020 Jiaxun Yang <jiaxun.yang@flygoat.com>
> + *
> + */
> +
> +#ifndef LOONSGON_LIOINTC_H
> +#define LOONGSON_LIOINTC_H
> +
> +#include "qemu/units.h"
> +#include "hw/sysbus.h"
> +#include "qom/object.h"
> +
> +#define NUM_IRQS                32
> +
> +#define NUM_CORES               4
> +#define NUM_IPS                 4
> +#define NUM_PARENTS             (NUM_CORES * NUM_IPS)
> +#define PARENT_COREx_IPy(x, y)  (NUM_IPS * x + y)
> +
> +#define R_MAPPER_START          0x0
> +#define R_MAPPER_END            0x20
> +#define R_ISR                   R_MAPPER_END
> +#define R_IEN                   0x24
> +#define R_IEN_SET               0x28
> +#define R_IEN_CLR               0x2c
> +#define R_ISR_SIZE              0x8
> +#define R_START                 0x40
> +#define R_END                   0x64

Can we keep the R_* definitions local in the .c?
(if you agree I can amend that when applying).

Thanks for cleaning!

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

> +
> +#define TYPE_LOONGSON_LIOINTC "loongson.liointc"
> +DECLARE_INSTANCE_CHECKER(struct loongson_liointc, LOONGSON_LIOINTC,
> +                         TYPE_LOONGSON_LIOINTC)
> +
> +#endif /* LOONGSON_LIOINTC_H */
> 



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