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Re: [PATCH] hw/riscv: sifive_u: Correct the CLINT timebase frequency


From: Alistair Francis
Subject: Re: [PATCH] hw/riscv: sifive_u: Correct the CLINT timebase frequency
Date: Fri, 9 Jul 2021 13:50:47 +1000

On Tue, Jul 6, 2021 at 8:48 PM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> From: Bin Meng <bin.meng@windriver.com>
>
> At present the CLINT timebase frequency is set to 10MHz on sifive_u,
> but on the real hardware the timebase frequency is 1Mhz.
>
> Signed-off-by: Bin Meng <bin.meng@windriver.com>

Thanks!

Applied to riscv-to-apply.next

Alistair

> ---
>
>  hw/riscv/sifive_u.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c
> index 273c86418c..e75ca38783 100644
> --- a/hw/riscv/sifive_u.c
> +++ b/hw/riscv/sifive_u.c
> @@ -62,6 +62,9 @@
>
>  #include <libfdt.h>
>
> +/* CLINT timebase frequency */
> +#define CLINT_TIMEBASE_FREQ 1000000
> +
>  static const MemMapEntry sifive_u_memmap[] = {
>      [SIFIVE_U_DEV_DEBUG] =    {        0x0,      0x100 },
>      [SIFIVE_U_DEV_MROM] =     {     0x1000,     0xf000 },
> @@ -165,7 +168,7 @@ static void create_fdt(SiFiveUState *s, const MemMapEntry 
> *memmap,
>
>      qemu_fdt_add_subnode(fdt, "/cpus");
>      qemu_fdt_setprop_cell(fdt, "/cpus", "timebase-frequency",
> -        SIFIVE_CLINT_TIMEBASE_FREQ);
> +        CLINT_TIMEBASE_FREQ);
>      qemu_fdt_setprop_cell(fdt, "/cpus", "#size-cells", 0x0);
>      qemu_fdt_setprop_cell(fdt, "/cpus", "#address-cells", 0x1);
>
> @@ -847,7 +850,7 @@ static void sifive_u_soc_realize(DeviceState *dev, Error 
> **errp)
>      sifive_clint_create(memmap[SIFIVE_U_DEV_CLINT].base,
>          memmap[SIFIVE_U_DEV_CLINT].size, 0, ms->smp.cpus,
>          SIFIVE_SIP_BASE, SIFIVE_TIMECMP_BASE, SIFIVE_TIME_BASE,
> -        SIFIVE_CLINT_TIMEBASE_FREQ, false);
> +        CLINT_TIMEBASE_FREQ, false);
>
>      if (!sysbus_realize(SYS_BUS_DEVICE(&s->prci), errp)) {
>          return;
> --
> 2.25.1
>
>



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