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xiaoxiang pushed a change to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git.


    from ad25c43  net/tcp/sendfile: fast retransmit on duplicate 
acknowledgments (RFC 5681). (the same as it was implemented in 
tcp_send_unbuffered.c)
     new 3fa0834  Fix PROTECTED_BUILD build errors for mpfs target
     new 356ae98  Add knsh target for icicle
     new 7eb726d  Add proper user/kernel space linker scripts for knsh target
     new 8a4881c  Implement CONFIG_BUILD_PROTECTED with MMU
     new 81188d9  Extend the RISC-V PMP functionality
     new fc3cd30  Wipe the PMP configuration in MPFS bootloader start routine

The 6 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.


Summary of changes:
 arch/risc-v/Kconfig                                |  24 +
 arch/risc-v/include/csr.h                          |   1 +
 arch/risc-v/src/common/riscv_internal.h            |  14 +-
 arch/risc-v/src/common/riscv_pmp.c                 | 562 ++++++++++++++++++++-
 arch/risc-v/src/mpfs/Kconfig                       |  12 +
 arch/risc-v/src/mpfs/mpfs_head.S                   |   4 +
 arch/risc-v/src/mpfs/mpfs_userspace.c              | 212 +++++++-
 boards/risc-v/mpfs/common/kernel/mpfs_userspace.c  |   7 -
 .../mpfs/icicle/configs/{nsh => knsh}/defconfig    |  12 +-
 boards/risc-v/mpfs/icicle/scripts/Make.defs        |  16 +-
 .../icicle/scripts/{ld.script => kernel-space.ld}  |  45 +-
 boards/risc-v/mpfs/icicle/scripts/memory.ld        |  11 +-
 boards/risc-v/mpfs/icicle/scripts/user-space.ld    |   2 +-
 13 files changed, 855 insertions(+), 67 deletions(-)
 copy boards/risc-v/mpfs/icicle/configs/{nsh => knsh}/defconfig (87%)
 copy boards/risc-v/mpfs/icicle/scripts/{ld.script => kernel-space.ld} (77%)

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