Re: [PATCH 01/18] target/riscv: cpu: Add a new 'resetvec' property

[Alistair Francis]

On Fri, Aug 14, 2020 at 9:43 AM Bin Meng <bmeng.cn@gmail.com> wrote:
>
> From: Bin Meng <bin.meng@windriver.com>
>
> Currently the reset vector address is hard-coded in a RISC-V CPU's
> instance_init() routine. In a real world we can have 2 exact same
> CPUs except for the reset vector address, which is pretty common in
> the RISC-V core IP licensing business.
>
> Normally reset vector address is a configurable parameter. Let's
> create a 64-bit property to store the reset vector address which
> covers both 32-bit and 64-bit CPUs.
>
> Signed-off-by: Bin Meng <bin.meng@windriver.com>

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>
>  target/riscv/cpu.c | 1 +
>  target/riscv/cpu.h | 1 +
>  2 files changed, 2 insertions(+)
>
> diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
> index 228b9bd..8067a26 100644
> --- a/target/riscv/cpu.c
> +++ b/target/riscv/cpu.c
> @@ -518,6 +518,7 @@ static Property riscv_cpu_properties[] = {
>      DEFINE_PROP_UINT16("elen", RISCVCPU, cfg.elen, 64),
>      DEFINE_PROP_BOOL("mmu", RISCVCPU, cfg.mmu, true),
>      DEFINE_PROP_BOOL("pmp", RISCVCPU, cfg.pmp, true),
> +    DEFINE_PROP_UINT64("resetvec", RISCVCPU, cfg.resetvec, DEFAULT_RSTVEC),
>      DEFINE_PROP_END_OF_LIST(),
>  };
>
> diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
> index a804a5d..d34bcfa 100644
> --- a/target/riscv/cpu.h
> +++ b/target/riscv/cpu.h
> @@ -291,6 +291,7 @@ typedef struct RISCVCPU {
>          uint16_t elen;
>          bool mmu;
>          bool pmp;
> +        uint64_t resetvec;
>      } cfg;
>  } RISCVCPU;
>
> --
> 2.7.4
>
>