[U-Boot] [PATCH v4 0/3] RISC-V S-mode support

[Rick Chen]

> > Subject: [PATCH v4 0/3] RISC-V S-mode support
> >
> > This patchset allows us runing u-boot in S-mode which is useful on platforms
> > where M-mode runtime firmware is an independent firmware and u-boot is used
> > as last stage OS bootloader.
> >
> > The patchset based upon git://git.denx.de/u-boot-riscv.git

Hi Anup

I apply your patch-sets fail on u-boot-riscv.git
Can you tell me which commit id I shall base on ?

Rick

> > and is tested on QEMU in both M-mode and S-mode.
> >
> > For S-mode testing, we have used u-boot.bin as payload of latest BBL (at commit
> > 6ebd0f2a46255d0c76dad3c05b16c1d154795d26)
> > applied with following changes:
> >
> > diff --git a/machine/emulation.c b/machine/emulation.c index 132e977..def75e1
> > 100644
> > --- a/machine/emulation.c
> > +++ b/machine/emulation.c
> > @@ -162,6 +162,12 @@ static inline int emulate_read_csr(int num, uintptr_t
> > mstatus, uintptr_t* result
> >
> >    switch (num)
> >    {
> > +    case CSR_MISA:
> > +      *result = read_csr(misa);
> > +      return 0;
> > +    case CSR_MHARTID:
> > +      *result = read_csr(mhartid);
> > +      return 0;
> >      case CSR_CYCLE:
> >        if (!((counteren >> (CSR_CYCLE - CSR_CYCLE)) & 1))
> >          return -1;
> >
> > Changes since v3:
> >  - Replaced 'u-boot' with 'U-Boot' in commit message
> >  - Dropped 'an' in RISCV_SMODE kconfig option help message
> >  - Added appropriate #ifdef in arch/riscv/lib/interrupts.c
> >
> > Changes since v2:
> >  - Dropped 'default n" from RISCV_SMODE kconfig option
> >  - Replaced '-smode_' in defconfig names with '_smode_'
> >
> > Changes since v1:
> >  - Rebased upon latest git://git.denx.de/u-boot-riscv.git
> >  - Add details in cover letter for running u-boot in S-mode
> >    using BBL
> >
> > Anup Patel (3):
> >   riscv: Add kconfig option to run U-Boot in S-mode
> >   riscv: qemu: Use different SYS_TEXT_BASE for S-mode
> >   riscv: Add S-mode defconfigs for QEMU virt machine
> >
> >  arch/riscv/Kconfig                     |  5 ++++
> >  arch/riscv/cpu/start.S                 | 33 +++++++++++++++++++++++
> >  arch/riscv/include/asm/encoding.h      |  2 ++
> >  arch/riscv/lib/interrupts.c            | 36 +++++++++++++++++++-------
> >  board/emulation/qemu-riscv/Kconfig     |  3 ++-
> >  board/emulation/qemu-riscv/MAINTAINERS |  2 ++
> >  configs/qemu-riscv32_smode_defconfig   | 10 +++++++
> >  configs/qemu-riscv64_smode_defconfig   | 11 ++++++++
> >  8 files changed, 92 insertions(+), 10 deletions(-)  create mode 100644
> > configs/qemu-riscv32_smode_defconfig
> >  create mode 100644 configs/qemu-riscv64_smode_defconfig
> >
> > --
> > 2.17.1
>