From f6847af0cdd345c5903349dc7e7b04992ecef44f Mon Sep 17 00:00:00 2001
From: chenhy0106 <42792255+chenhy0106@users.noreply.github.com>
Date: Thu, 9 Mar 2023 20:25:54 +0800
Subject: [PATCH] [libcpu/riscv/c906] fix "next_asid" type error (#7031)
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MAX_ASID最大为0x10000，在next_asid==MAX_ASID时进入下一个generation。因此next_asid不能只有16位，否则将不能进入下一个generation。修改rt_uint16_t为rt_uint32_t。
---
 libcpu/risc-v/t-head/c906/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcpu/risc-v/t-head/c906/mmu.c b/libcpu/risc-v/t-head/c906/mmu.c
index 73481dccf0..75893d65e6 100644
--- a/libcpu/risc-v/t-head/c906/mmu.c
+++ b/libcpu/risc-v/t-head/c906/mmu.c
@@ -42,7 +42,7 @@ volatile __attribute__((aligned(4 * 1024)))
 rt_ubase_t MMUTable[__SIZE(VPN2_BIT)];
 
 static rt_uint8_t ASID_BITS = 0;
-static rt_uint16_t next_asid;
+static rt_uint32_t next_asid;
 static rt_uint64_t global_asid_generation;
 #define ASID_MASK ((1 << ASID_BITS) - 1)
 #define ASID_FIRST_GENERATION (1 << ASID_BITS)