[PATCH v3 0/3] Add riscv semihosting support in u-boot

[Kautuk Consul <kconsul@ventanamicro.com>]

Semihosting is a mechanism that enables code running on
a target to communicate and use the Input/Output
facilities on a host computer that is running a debugger.
This patchset adds support for semihosting in u-boot
for RISCV64 targets.

CHANGES since v2:
-	Move the arch/arm/Kconfig common *SEMIHOSTING* config
	options from arch/arm/Kconfig to lib/Kconfig.
-	Improve the *SEMIHOSTING_FALLBACK config options in
	lib/Kconfig to depend on RISCV or ARM64.
-	Remove the arch/riscv/include/asm/semhosting.h file.
-	Improve the arch/riscv/lib/semihosting.c by removing the
	jump statement and moving the .align 4 to before the 2
	.option directives.

Kautuk Consul (3):
  lib: Add common semihosting library
  arch/riscv: add semihosting support for RISC-V
  board: qemu-riscv: enable semihosting

 arch/arm/Kconfig                     |  46 -------
 arch/arm/lib/semihosting.c           | 181 +-------------------------
 arch/riscv/include/asm/spl.h         |   1 +
 arch/riscv/lib/Makefile              |   2 +
 arch/riscv/lib/interrupts.c          |  11 ++
 arch/riscv/lib/semihosting.c         |  24 ++++
 configs/qemu-riscv32_defconfig       |   4 +
 configs/qemu-riscv32_smode_defconfig |   4 +
 configs/qemu-riscv32_spl_defconfig   |   7 +
 configs/qemu-riscv64_defconfig       |   4 +
 configs/qemu-riscv64_smode_defconfig |   4 +
 configs/qemu-riscv64_spl_defconfig   |   7 +
 include/semihosting.h                |  11 ++
 lib/Kconfig                          |  46 +++++++
 lib/Makefile                         |   2 +
 lib/semihosting.c                    | 186 +++++++++++++++++++++++++++
 16 files changed, 314 insertions(+), 226 deletions(-)
 create mode 100644 arch/riscv/lib/semihosting.c
 create mode 100644 lib/semihosting.c

-- 
2.34.1