core: drivers: riscv_zkr_rng: limit seed reading time

If the attempts to read SEED exceed 1 second for 16-bit
randomness, we consider it a failure.

Also, move seed CSR field encodings to the header

core: drivers: riscv_zkr_rng: limit seed reading time

If the attempts to read SEED exceed 1 second for 16-bit
randomness, we consider it a failure.

Also, move seed CSR field encodings to the header file.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Alvin Chang <alvinga@andestech.com>
Tested-by: Alvin Chang <alvinga@andestech.com>
Acked-by: Gatien Chevallier <gatien.chevallier@foss.st.com>

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core: riscv: core_mmu_arch: fix PPN field extraction from PTE

The upper bits of page table entry may contain other fields
introduced since Priv. ISA spec. v1.11 (20211203), such as PBMT
and N bits,

core: riscv: core_mmu_arch: fix PPN field extraction from PTE

The upper bits of page table entry may contain other fields
introduced since Priv. ISA spec. v1.11 (20211203), such as PBMT
and N bits, thus PPN field should be masked out with PTE_PPN.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Alvin Chang <alvinga@andestech.com>
Tested-by: Alvin Chang <alvinga@andestech.com>
Reviewed-by: Marouene Boubakri <marouene.boubakri@nxp.com>

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core: riscv: Refactor macros for inline assembly of CSR operations

Current CSR macros with inline assembly will lead to compilation error,
because they use pre-processor stringizing not value substi

core: riscv: Refactor macros for inline assembly of CSR operations

Current CSR macros with inline assembly will lead to compilation error,
because they use pre-processor stringizing not value substitution. The
definitions such as CSR_XSTATUS are not sustituted to CSR encoding in
CSR macros and compiler generates: Error: unknown CSR `CSR_XSTATUS'.

This patch fixes it by making the given CSR to be an assembly input
operand with constraint "i", which is used to indicate the operand is
an immediate integer operand. Thus, the CSR encoding can be correctly
compiled.

Signed-off-by: Alvin Chang <alvinga@andestech.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

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core: riscv: define RISC-V instruction set architecture in encoding.h

Define standard RISC-V instruction opcodes, control and status registers.
This file is auto-generated from riscv-opcodes and it

core: riscv: define RISC-V instruction set architecture in encoding.h

Define standard RISC-V instruction opcodes, control and status registers.
This file is auto-generated from riscv-opcodes and it is subject of
regular updates.

Signed-off-by: Marouene Boubakri <marouene.boubakri@nxp.com>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

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