target/loongarch: Add tlb search callback in loongarch_tlb_search()

With function loongarch_tlb_search(), it is to search TLB entry with
speficied virtual address, the difference is selection with asid and
global bit. Here add selection callback with asid and global bit.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

Author: bibo-mao

target/loongarch/tcg/tlb_helper.c

@@ -21,6 +21,13 @@
 #include "cpu-csr.h"
 #include "tcg/tcg_loongarch.h"
 
+typedef bool (*tlb_match)(bool global, int asid, int tlb_asid);
+
+static bool tlb_match_any(bool global, int asid, int tlb_asid)
+{
+    return global || tlb_asid == asid;
+}
+
 bool check_ps(CPULoongArchState *env, uint8_t tlb_ps)
 {
     if (tlb_ps >= 64) {
@@ -201,12 +208,15 @@ static bool loongarch_tlb_search(CPULoongArchState *env, vaddr vaddr,
 {
     LoongArchTLB *tlb;
     uint16_t csr_asid, tlb_asid, stlb_idx;
-    uint8_t tlb_e, tlb_ps, tlb_g, stlb_ps;
+    uint8_t tlb_e, tlb_ps, stlb_ps;
+    bool tlb_g;
     int i, compare_shift;
     uint64_t vpn, tlb_vppn;
+    tlb_match func;
 
+    func = tlb_match_any;
     csr_asid = FIELD_EX64(env->CSR_ASID, CSR_ASID, ASID);
-   stlb_ps = FIELD_EX64(env->CSR_STLBPS, CSR_STLBPS, PS);
+    stlb_ps = FIELD_EX64(env->CSR_STLBPS, CSR_STLBPS, PS);
     vpn = (vaddr & TARGET_VIRT_MASK) >> (stlb_ps + 1);
     stlb_idx = vpn & 0xff; /* VA[25:15] <==> TLBIDX.index for 16KiB Page */
     compare_shift = stlb_ps + 1 - R_TLB_MISC_VPPN_SHIFT;
@@ -218,9 +228,9 @@ static bool loongarch_tlb_search(CPULoongArchState *env, vaddr vaddr,
         if (tlb_e) {
             tlb_vppn = FIELD_EX64(tlb->tlb_misc, TLB_MISC, VPPN);
             tlb_asid = FIELD_EX64(tlb->tlb_misc, TLB_MISC, ASID);
-            tlb_g = FIELD_EX64(tlb->tlb_entry0, TLBENTRY, G);
+            tlb_g = !!FIELD_EX64(tlb->tlb_entry0, TLBENTRY, G);
 
-            if ((tlb_g == 1 || tlb_asid == csr_asid) &&
+            if (func(tlb_g, csr_asid, tlb_asid) &&
                 (vpn == (tlb_vppn >> compare_shift))) {
                 *index = i * 256 + stlb_idx;
                 return true;
@@ -239,7 +249,7 @@ static bool loongarch_tlb_search(CPULoongArchState *env, vaddr vaddr,
             tlb_g = FIELD_EX64(tlb->tlb_entry0, TLBENTRY, G);
             compare_shift = tlb_ps + 1 - R_TLB_MISC_VPPN_SHIFT;
             vpn = (vaddr & TARGET_VIRT_MASK) >> (tlb_ps + 1);
-            if ((tlb_g == 1 || tlb_asid == csr_asid) &&
+            if (func(tlb_g, csr_asid, tlb_asid) &&
                 (vpn == (tlb_vppn >> compare_shift))) {
                 *index = i;
                 return true;