feat(Custom): SMBLOCKCTL Custom CSR implementation for timeout (#980)

Author: Anzooooo

src/isa/riscv64/local-include/csr.h

@@ -45,7 +45,7 @@
 
 #define CUSTOM_CSR_SPFCTL_WMASK     0x3fffff
 #define CUSTOM_CSR_SLVPREDCTL_WMASK 0x1ff
-#define CUSTOM_CSR_SMBLOCKCTL_WMASK 0x3ff
+#define CUSTOM_CSR_SMBLOCKCTL_WMASK 0xffffffff
 #define CUSTOM_CSR_SRNCTL_WMASK     0x5
 #define CUSTOM_CSR_MCOREPWR_WMASK   0x1
 #define CUSTOM_CSR_MFLUSHPWR_WMASK  0x1
@@ -1291,6 +1291,7 @@ CSR_STRUCT_START(smblockctl)
   uint64_t uncache_write_outstanding_enable : 1; // [7] Enable uncache write outstanding (0).
   uint64_t hd_misalign_st_enable            : 1; // [8] Enable hardware store misalign.
   uint64_t hd_misalign_ld_enable            : 1; // [9] Enable hardware load misalign.
+    uint64_t sbuffer_timeout                  : 22;// [31:20] Store buffer flush timeout.
 CSR_STRUCT_END(smblockctl)
 
 /** Supervisor Timer Register**/

src/isa/riscv64/system/priv.c

@@ -178,6 +178,7 @@ void init_custom_csr() {
   slvpredctl->storeset_no_fast_wakeup = 0;
   slvpredctl->lvpred_timeout = 3;
 
+  smblockctl->sbuffer_timeout = 1<<20;
   smblockctl->sbuffer_threshold = 7;
   smblockctl->ldld_vio_check_enable = 1;
   smblockctl->soft_prefetch_enable = 1;