diff options
| author | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2021-12-17 18:02:58 +0100 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-12-22 09:05:05 +0530 |
| commit | 2082153fc90c54b98647b1fbaeb7511fd57b7d2b (patch) | |
| tree | 27afbf0ba9f31a9be6125909ca3e46f210ff80b3 | |
| parent | f27035981096e8d272d94dc17402b10567429869 (diff) | |
lib: sbi: simplify pmp_set(), pmp_get()
pmpcfg_csr and pmpcfg_shift are only negative for an unexpected value of
__riscv_xlen. We can immediately return in this case.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Dong Du <Dd_nirvana@sjtu.edu.cn>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
| -rw-r--r-- | lib/sbi/riscv_asm.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/lib/sbi/riscv_asm.c b/lib/sbi/riscv_asm.c index 2e2e148..847bdba 100644 --- a/lib/sbi/riscv_asm.c +++ b/lib/sbi/riscv_asm.c @@ -261,12 +261,9 @@ int pmp_set(unsigned int n, unsigned long prot, unsigned long addr, pmpcfg_csr = (CSR_PMPCFG0 + (n >> 2)) & ~1; pmpcfg_shift = (n & 7) << 3; #else - pmpcfg_csr = -1; - pmpcfg_shift = -1; + return SBI_ENOTSUPP; #endif pmpaddr_csr = CSR_PMPADDR0 + n; - if (pmpcfg_csr < 0 || pmpcfg_shift < 0) - return SBI_ENOTSUPP; /* encode PMP config */ prot &= ~PMP_A; @@ -315,12 +312,9 @@ int pmp_get(unsigned int n, unsigned long *prot_out, unsigned long *addr_out, pmpcfg_csr = (CSR_PMPCFG0 + (n >> 2)) & ~1; pmpcfg_shift = (n & 7) << 3; #else - pmpcfg_csr = -1; - pmpcfg_shift = -1; + return SBI_ENOTSUPP; #endif pmpaddr_csr = CSR_PMPADDR0 + n; - if (pmpcfg_csr < 0 || pmpcfg_shift < 0) - return SBI_ENOTSUPP; /* decode PMP config */ cfgmask = (0xffUL << pmpcfg_shift); |