target-mips: add 24KEc CPU definition

Define a new CPU definition supporting 24KEc cores, similar to
the existing 24Kc, but with added support for DSP instructions
and MIPS16e (and without FPU).

Signed-off-by: André Draszik <git@andred.net>
Signed-off-by: Leon Alrae <leon.alrae@imgtec.com>

target-mips/translate_init.c

@@ -255,6 +255,28 @@ static const mips_def_t mips_defs[] =
         .insn_flags = CPU_MIPS32R2 | ASE_MIPS16,
         .mmu_type = MMU_TYPE_R4000,
     },
+    {
+        .name = "24KEc",
+        .CP0_PRid = 0x00019600,
+        .CP0_Config0 = MIPS_CONFIG0 | (0x1 << CP0C0_AR) |
+                       (MMU_TYPE_R4000 << CP0C0_MT),
+        .CP0_Config1 = MIPS_CONFIG1 | (15 << CP0C1_MMU) |
+                       (0 << CP0C1_IS) | (3 << CP0C1_IL) | (1 << CP0C1_IA) |
+                       (0 << CP0C1_DS) | (3 << CP0C1_DL) | (1 << CP0C1_DA) |
+                       (1 << CP0C1_CA),
+        .CP0_Config2 = MIPS_CONFIG2,
+        .CP0_Config3 = MIPS_CONFIG3 | (1 << CP0C3_DSPP) | (0 << CP0C3_VInt),
+        .CP0_LLAddr_rw_bitmask = 0,
+        .CP0_LLAddr_shift = 4,
+        .SYNCI_Step = 32,
+        .CCRes = 2,
+        /* we have a DSP, but no FPU */
+        .CP0_Status_rw_bitmask = 0x1378FF1F,
+        .SEGBITS = 32,
+        .PABITS = 32,
+        .insn_flags = CPU_MIPS32R2 | ASE_MIPS16 | ASE_DSP,
+        .mmu_type = MMU_TYPE_R4000,
+    },
     {
         .name = "24Kf",
         .CP0_PRid = 0x00019300,