HI Rahul,
On Fri, Oct 8, 2021 at 5:47 PM Rahul Pathak <rpat...@ventanamicro.com> wrote:
>
> Hi Bin
>
>
> On Thu, Oct 7, 2021 at 11:07 AM Bin Meng <bmeng...@gmail.com> wrote:
> >
> > On Sun, Oct 3, 2021 at 7:29 PM Rahul Pathak <rpat...@ventanamicro.com>
> > wrote:
> > >
> > > mconfigptr is an mandatory CSR as per the priv spec.
> >
> > %s/an/a
> >
>
> Done
>
> >
> > as per the priv spec v1.12
> >
> > > This csr holds the physical address of the configuration
> > > data structure if this data structure is implemented
> > > Its an readonly csr set to zero making configuration
> > > data structure not supported.
> > >
> > > Signed-off-by: Rahul Pathak <rpat...@ventanamicro.com>
> > > ---
> > > target/riscv/cpu_bits.h | 1 +
> > > target/riscv/csr.c | 1 +
> > > 2 files changed, 2 insertions(+)
> > >
> > > diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
> > > index 999187a9ee..5dc4729ed5 100644
> > > --- a/target/riscv/cpu_bits.h
> > > +++ b/target/riscv/cpu_bits.h
> > > @@ -140,6 +140,7 @@
> > > #define CSR_MARCHID 0xf12
> > > #define CSR_MIMPID 0xf13
> > > #define CSR_MHARTID 0xf14
> > > +#define CSR_MCONFIGPTR 0xf15
> > >
> > > /* Machine Trap Setup */
> > > #define CSR_MSTATUS 0x300
> > > diff --git a/target/riscv/csr.c b/target/riscv/csr.c
> > > index 23fbbd3216..2182943f54 100644
> > > --- a/target/riscv/csr.c
> > > +++ b/target/riscv/csr.c
> > > @@ -1549,6 +1549,7 @@ riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = {
> > > [CSR_MARCHID] = { "marchid", any, read_zero },
> > > [CSR_MIMPID] = { "mimpid", any, read_zero },
> > > [CSR_MHARTID] = { "mhartid", any, read_mhartid },
> > > + [CSR_MCONFIGPTR] = {"mconfigptr", any, read_zero },
> >
> > Not any, as we need to check the priv version >= 1.12
>
>
> To check the priv version, I am thinking of creating a generic
> predicate function
> which checks the env->priv_ver.?
> Generic predicate function for the priv version can be reused in other such
> scenarios also.
Sounds good to me. Thanks!
Regards,
Bin
