On Sun, 2019-03-10 at 21:01 +0800, Bin Meng wrote: > On Wed, Mar 6, 2019 at 6:54 AM Lukas Auer > <lukas.a...@aisec.fraunhofer.de> wrote: > > On RISC-V, all harts boot independently. To be able to run on a > > multi-hart system, U-Boot must be extended with the functionality > > to > > manage all harts in the system. All harts entering U-Boot are > > registered > > in the available_harts mask stored in global data. A hart lottery > > system > > as used in the Linux kernel selects the hart U-Boot runs on. All > > other > > harts are halted. U-Boot can delegate functions to them using > > smp_call_function(). > > > > Every hart has a valid pointer to the global data structure and a > > 8KiB > > stack by default. The stack size is set with > > CONFIG_STACK_SIZE_SHIFT. > > > > Signed-off-by: Lukas Auer <lukas.a...@aisec.fraunhofer.de> > > --- > > > > Changes in v2: > > - Implement hart lottery to pick main hart to run U-Boot > > - Remove CONFIG_MAIN_HART as it is not required anymore > > - Register available harts in the available_harts mask > > > > arch/riscv/Kconfig | 4 ++ > > arch/riscv/cpu/cpu.c | 9 ++- > > arch/riscv/cpu/start.S | 134 > > ++++++++++++++++++++++++++++++++++- > > arch/riscv/include/asm/csr.h | 1 + > > arch/riscv/lib/asm-offsets.c | 1 + > > 5 files changed, 147 insertions(+), 2 deletions(-) > > > > Looks quite good! >
Thank you and thanks for testing and reviewing the series! Lukas _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
