[U-Boot] [RESEND PATCH v2 10/15] riscv: bootm: Pass mhartid CSR value to kernel

[Rick Chen]

 > From: Bin Meng [mailto:bmeng.cn at gmail.com]
 > Sent: Tuesday, September 11, 2018 12:55 PM
 > To: Rick Jian-Zhi Chen(陳建志); U-Boot Mailing List
 > Cc: Lukas Auer
 > Subject: [RESEND PATCH v2 10/15] riscv: bootm: Pass mhartid CSR
value to kernel
 >
 > So far this is hardcoded to zero, and we should read the value from
mhartid CSR
 > and pass it to Linux kernel.
 >
 > Suggested-by: Lukas Auer <lukas.auer at aisec.fraunhofer.de>
 > Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
 >
 > ---
 >
 > Changes in v2:
 > - new patch to pass mhartid CSR value to kernel
 >
 >  arch/riscv/lib/bootm.c | 5 +++--
 >  1 file changed, 3 insertions(+), 2 deletions(-)
 >
> > diff --git a/arch/riscv/lib/bootm.c b/arch/riscv/lib/bootm.c index
 > 6893108..a7a9fb9 100644
 > --- a/arch/riscv/lib/bootm.c
 > +++ b/arch/riscv/lib/bootm.c
 > @@ -11,6 +11,7 @@
 >  #include <image.h>
 >  #include <u-boot/zlib.h>
 >  #include <asm/byteorder.h>
 > +#include <asm/csr.h>
 >
 >  DECLARE_GLOBAL_DATA_PTR;
 >
 > @@ -57,9 +58,9 @@ int do_bootm_linux(int flag, int argc, char *argv[],
 > bootm_headers_t *images)
 >       printf("\nStarting kernel ...\n\n");
 >
 >       cleanup_before_linux();
 > -     /* TODO: hardcode the hart id to zero for now */
 > +
 >       if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
 > -             kernel(0, images->ft_addr);
 > +             kernel(csr_read(mhartid), images->ft_addr);
 >
 >       /* does not return */
 >

Reviewed-by: Rick Chen <rick at andestech.com>

> > --
 > 2.7.4