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arch: riscv: introduce CONFIG_RISCV_GP_PURPOSE choice

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Introduce `CONFIG_RISCV_GP_PURPOSE` choice to make sure that only
one of `CONFIG_RISCV_GP` or `CONFIG_RISCV_CURRENT_VIA_GP` can be
enabled, instead of relying of dependencies.

To do that, introduce a new
`CONFIG_RISCV_SOC_HAS_GP_RELATIVE_ADDRESSING` that can be selected
by SoC when it implemented global pointer (GP) initialization for
relative addressing in its linker.

`CONFIG_RISCV_GP` will be the default choice when
`CONFIG_RISCV_SOC_HAS_GP_RELATIVE_ADDRESSING=y`

Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Signed-off-by: Yong Cong Sin <yongcong.sin@gmail.com>
This commit is contained in:
Yong Cong Sin 2024-11-25 12:54:01 +08:00 • committed by Benjamin Cabé
commit e6dd68ec89
37 changed files with 33 additions and 56 deletions
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1
soc/lowrisc/opentitan/Kconfig
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@ -16,6 +16,7 @@ config SOC_OPENTITAN
select RISCV
select RISCV_PRIVILEGED
select RISCV_HAS_PLIC
select RISCV_SOC_HAS_GP_RELATIVE_ADDRESSING
# OpenTitan Ibex core mtvec mode is read-only / forced to vectored mode.
select RISCV_VECTORED_MODE
select GEN_IRQ_VECTOR_TABLE

3
soc/lowrisc/opentitan/Kconfig.defconfig
View file

@ -9,9 +9,6 @@ config SYS_CLOCK_HW_CYCLES_PER_SEC
config RISCV_SOC_INTERRUPT_INIT
default y
config RISCV_GP
default y
config 2ND_LVL_ISR_TBL_OFFSET
default 32