From 9456c2fbcd82dd82328ac6e7602a815582b1043e Mon Sep 17 00:00:00 2001
From: Leon Alrae <leon.alrae@imgtec.com>
Date: Mon, 7 Jul 2014 11:24:00 +0100
Subject: target-mips: add TLBINV support

For Standard TLB configuration (Config.MT=1):

TLBINV invalidates a set of TLB entries based on ASID. The virtual address is
ignored in the entry match. TLB entries which have their G bit set to 1 are not
modified.

TLBINVF causes all entries to be invalidated.

Single TLB entry can be marked as invalid on TLB entry write by having
EntryHi.EHINV set to 1.

Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>
Reviewed-by: Yongbok Kim <yongbok.kim@imgtec.com>
---
 target-mips/translate.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'target-mips/translate.c')

diff --git a/target-mips/translate.c b/target-mips/translate.c
index e8933a9..fdb61be 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -896,6 +896,8 @@ enum {
 enum {
     OPC_TLBR     = 0x01 | OPC_C0,
     OPC_TLBWI    = 0x02 | OPC_C0,
+    OPC_TLBINV   = 0x03 | OPC_C0,
+    OPC_TLBINVF  = 0x04 | OPC_C0,
     OPC_TLBWR    = 0x06 | OPC_C0,
     OPC_TLBP     = 0x08 | OPC_C0,
     OPC_RFE      = 0x10 | OPC_C0,
@@ -1172,6 +1174,7 @@ typedef struct DisasContext {
     bool ulri;
     int kscrexist;
     bool rxi;
+    int ie;
 } DisasContext;
 
 enum {
@@ -7516,6 +7519,24 @@ static void gen_cp0 (CPUMIPSState *env, DisasContext *ctx, uint32_t opc, int rt,
             goto die;
         gen_helper_tlbwi(cpu_env);
         break;
+    case OPC_TLBINV:
+        opn = "tlbinv";
+        if (ctx->ie >= 2) {
+            if (!env->tlb->helper_tlbinv) {
+                goto die;
+            }
+            gen_helper_tlbinv(cpu_env);
+        } /* treat as nop if TLBINV not supported */
+        break;
+    case OPC_TLBINVF:
+        opn = "tlbinvf";
+        if (ctx->ie >= 2) {
+            if (!env->tlb->helper_tlbinvf) {
+                goto die;
+            }
+            gen_helper_tlbinvf(cpu_env);
+        } /* treat as nop if TLBINV not supported */
+        break;
     case OPC_TLBWR:
         opn = "tlbwr";
         if (!env->tlb->helper_tlbwr)
@@ -17478,6 +17499,7 @@ gen_intermediate_code_internal(MIPSCPU *cpu, TranslationBlock *tb,
     ctx.bstate = BS_NONE;
     ctx.kscrexist = (env->CP0_Config4 >> CP0C4_KScrExist) & 0xff;
     ctx.rxi = (env->CP0_Config3 >> CP0C3_RXI) & 1;
+    ctx.ie = (env->CP0_Config4 >> CP0C4_IE) & 3;
     /* Restore delay slot state from the tb context.  */
     ctx.hflags = (uint32_t)tb->flags; /* FIXME: maybe use 64 bits here? */
     ctx.ulri = env->CP0_Config3 & (1 << CP0C3_ULRI);
-- 
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