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lib: sbi: fix missing high 32bits when sbi_cppc_write on rv32

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sbi_cppc_write was writing to the a1 register only, which under rv32
would cause the high 32 bits to always be 0. This patch fixes that.

Closes: https://github.com/riscv-software-src/opensbi/issues/334

Signed-off-by: Xiang W <wxjstz@126.com>
Reported-by: Wesley Norris <repnop@outlook.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Xiang W 2024-09-23 09:37:53 +08:00 committed by Anup Patel
parent 3e141a6950
commit 2ffa0a153d
1 changed files with 7 additions and 1 deletions
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8
lib/sbi/sbi_ecall_cppc.c
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@ -32,7 +32,13 @@ static int sbi_ecall_cppc_handler(unsigned long extid, unsigned long funcid,
#endif
break;
case SBI_EXT_CPPC_WRITE:
ret = sbi_cppc_write(regs->a0, regs->a1);
#if __riscv_xlen == 32
temp = regs->a2;
temp = (temp << 32) | regs->a1;
#else
temp = regs->a1;
#endif
ret = sbi_cppc_write(regs->a0, temp);
break;
case SBI_EXT_CPPC_PROBE:
ret = sbi_cppc_probe(regs->a0);