Re: [PATCH v1 09/11] hw/arm: versal: Add support for the RTC

[Philippe Mathieu-Daudé]

On 4/27/20 8:16 PM, Edgar E. Iglesias wrote:
> From: "Edgar E. Iglesias" <address@hidden>
> 
> hw/arm: versal: Add support for the RTC.
> 
> Signed-off-by: Edgar E. Iglesias <address@hidden>
> ---
>  hw/arm/xlnx-versal.c         | 21 +++++++++++++++++++++
>  include/hw/arm/xlnx-versal.h |  8 ++++++++
>  2 files changed, 29 insertions(+)
> 
> diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
> index e263bdf77a..321171bcce 100644
> --- a/hw/arm/xlnx-versal.c
> +++ b/hw/arm/xlnx-versal.c
> @@ -240,6 +240,26 @@ static void versal_create_sds(Versal *s, qemu_irq *pic)
>      }
>  }
>  
> +static void versal_create_rtc(Versal *s, qemu_irq *pic)
> +{
> +    SysBusDevice *sbd;
> +    MemoryRegion *mr;
> +
> +    sysbus_init_child_obj(OBJECT(s), "rtc", &s->pmc.rtc, sizeof(s->pmc.rtc),
> +                          TYPE_XLNX_ZYNQMP_RTC);
> +    sbd = SYS_BUS_DEVICE(&s->pmc.rtc);
> +    qdev_init_nofail(DEVICE(sbd));
> +
> +    mr = sysbus_mmio_get_region(sbd, 0);
> +    memory_region_add_subregion(&s->mr_ps, MM_PMC_RTC, mr);
> +
> +    /*
> +     * TODO: Connect the ALARM and SECONDS interrupts once our RTC model
> +     * supports them.
> +     */
> +    sysbus_connect_irq(sbd, 1, pic[VERSAL_RTC_APB_ERR_IRQ]);

RTC IRQ#1 is 'irq_addr_error_int', OK. Maybe worth later switching to
the qdev gpio API using qdev_init_gpio_out_named() in
hw/rtc/xlnx-zynqmp-rtc.c and then qdev_get_gpio_in_named() here.

Reviewed-by: Philippe Mathieu-Daudé <address@hidden>

> +}
> +
>  /* This takes the board allocated linear DDR memory and creates aliases
>   * for each split DDR range/aperture on the Versal address map.
>   */
> @@ -323,6 +343,7 @@ static void versal_realize(DeviceState *dev, Error **errp)
>      versal_create_gems(s, pic);
>      versal_create_admas(s, pic);
>      versal_create_sds(s, pic);
> +    versal_create_rtc(s, pic);
>      versal_map_ddr(s);
>      versal_unimp(s);
>  
> diff --git a/include/hw/arm/xlnx-versal.h b/include/hw/arm/xlnx-versal.h
> index e11693e29d..9c9f47ba9d 100644
> --- a/include/hw/arm/xlnx-versal.h
> +++ b/include/hw/arm/xlnx-versal.h
> @@ -19,6 +19,7 @@
>  #include "hw/char/pl011.h"
>  #include "hw/dma/xlnx-zdma.h"
>  #include "hw/net/cadence_gem.h"
> +#include "hw/rtc/xlnx-zynqmp-rtc.h"
>  
>  #define TYPE_XLNX_VERSAL "xlnx-versal"
>  #define XLNX_VERSAL(obj) OBJECT_CHECK(Versal, (obj), TYPE_XLNX_VERSAL)
> @@ -65,6 +66,8 @@ typedef struct Versal {
>          struct {
>              SDHCIState sd[XLNX_VERSAL_NR_SDS];
>          } iou;
> +
> +        XlnxZynqMPRTC rtc;
>      } pmc;
>  
>      struct {
> @@ -89,7 +92,10 @@ typedef struct Versal {
>  #define VERSAL_GEM1_IRQ_0          58
>  #define VERSAL_GEM1_WAKE_IRQ_0     59
>  #define VERSAL_ADMA_IRQ_0          60
> +#define VERSAL_RTC_APB_ERR_IRQ     121
>  #define VERSAL_SD0_IRQ_0           126
> +#define VERSAL_RTC_ALARM_IRQ       142
> +#define VERSAL_RTC_SECONDS_IRQ     143
>  
>  /* Architecturally reserved IRQs suitable for virtualization.  */
>  #define VERSAL_RSVD_IRQ_FIRST 111
> @@ -143,4 +149,6 @@ typedef struct Versal {
>  #define MM_PMC_SD0_SIZE             0x10000
>  #define MM_PMC_CRP                  0xf1260000U
>  #define MM_PMC_CRP_SIZE             0x10000
> +#define MM_PMC_RTC                  0xf12a0000
> +#define MM_PMC_RTC_SIZE             0x10000
>  #endif
>