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target/riscv: Introduce externally facing CSR access functions

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Convert riscv_csr_[read|write]() into target_ulong angnostic CSR access
functions that can be safely used from outside of target/ without
knowledge of the target register size.  Replace the 4 existing CSR
accesses in hw/ and linux-user/.

Signed-off-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20260520125406.28693-25-anjo@rev.ng>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Anton Johansson
2026-05-20 14:54:02 +02:00
committed by Alistair Francis
parent cfc1d1ade1
commit e59bd5cdb7
5 changed files with 27 additions and 20 deletions
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5
linux-user/riscv/signal.c
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@@ -90,7 +90,8 @@ static void setup_sigcontext(struct target_sigcontext *sc, CPURISCVState *env)
__put_user(env->fpr[i], &sc->fpr[i]);
}
uint32_t fcsr = riscv_csr_read(env, CSR_FCSR);
uint64_t fcsr;
riscv_csr_read_i64(env, CSR_FCSR, &fcsr);
__put_user(fcsr, &sc->fcsr);
}
@@ -159,7 +160,7 @@ static void restore_sigcontext(CPURISCVState *env, struct target_sigcontext *sc)
uint32_t fcsr;
__get_user(fcsr, &sc->fcsr);
riscv_csr_write(env, CSR_FCSR, fcsr);
riscv_csr_write_i64(env, CSR_FCSR, fcsr);
}
static void restore_ucontext(CPURISCVState *env, struct target_ucontext *uc)