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arch/Config.in.riscv: allow extensions for generic

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The generic extension set 'G' is realy a base with the minimal set of
extensions needed to be comfortable (but not required) to run a
linux-bassed system. Similarly, we consider the custom to be about the
custom set of features (not about a custom core implementing such a
set).

As such, we allow that a core with the G set can have futher extensions
without requiring it to be configured as a custom set.

We drop the intermediate symbols with the prompts, and move the prompts
to the previously hidden symbols, and add a prompt for the I set.

This alows one to clearly see what the generic set is about, without
having to delve into the help and hunt the list of selected symbol.

Note however that the G set implies Zicsr and Zifencei, but we have no
prompt for thos two, because in Buildroot, we assume that they are
mandatory and always present, like the I set (which they previously were
part of).

Signed-off-by: Jamie Gibbons <jamie.gibbons@microchip.com>
[yann.morin.1998@free.fr:
  - drop the intermediate symbols
  - move prompt to previously hidden symbols
  - add symbol for I
  - update defconfigs
  - reword the commit log accordingly
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Jamie Gibbons
2023-08-18 11:42:59 +01:00
committed by Yann E. MORIN
parent eea0c9f0c9
commit cbd91e89e4
14 changed files with 72 additions and 100 deletions
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8
configs/andes_ae350_45_defconfig
View File

@@ -1,9 +1,9 @@
BR2_riscv=y
BR2_riscv_custom=y
BR2_RISCV_ISA_CUSTOM_RVM=y
BR2_RISCV_ISA_CUSTOM_RVF=y
BR2_RISCV_ISA_CUSTOM_RVD=y
BR2_RISCV_ISA_CUSTOM_RVC=y
BR2_RISCV_ISA_RVM=y
BR2_RISCV_ISA_RVF=y
BR2_RISCV_ISA_RVD=y
BR2_RISCV_ISA_RVC=y
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_0=y
BR2_GLOBAL_PATCH_DIR="board/andes/ae350/patches"
BR2_TARGET_GENERIC_GETTY_PORT="ttyS0"