[Qemu-devel] [PATCH 11/15] Openrisc: add system instruction helpers

[Jia Liu <proljc@gmail.com>]

add the openrisc system instruction helpers.

Signed-off-by: Jia Liu <proljc@gmail.com>
---
 Makefile.target              |    2 +-
 target-openrisc/helper.h     |    4 +
 target-openrisc/sys_helper.c |  227 ++++++++++++++++++++++++++++++++++++++++++
 target-openrisc/translate.c  |    4 +-
 4 files changed, 234 insertions(+), 3 deletions(-)
 create mode 100644 target-openrisc/sys_helper.c

diff --git a/Makefile.target b/Makefile.target
index 433dd3c..ca1f45a 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -101,7 +101,7 @@ endif
 libobj-$(TARGET_SPARC) += int32_helper.o
 libobj-$(TARGET_SPARC64) += int64_helper.o
 libobj-$(TARGET_ALPHA) += int_helper.o fpu_helper.o sys_helper.o mem_helper.o
-libobj-$(TARGET_OPENRISC) += excp.o excp_helper.o fpu_helper.o int_helper.o intrp_helper.o mem.o mem_helper.o
+libobj-$(TARGET_OPENRISC) += excp.o excp_helper.o fpu_helper.o int_helper.o intrp_helper.o mem.o mem_helper.o sys_helper.o
 
 libobj-y += disas.o
 libobj-$(CONFIG_TCI_DIS) += tci-dis.o
diff --git a/target-openrisc/helper.h b/target-openrisc/helper.h
index b9b1d67..b515f92 100644
--- a/target-openrisc/helper.h
+++ b/target-openrisc/helper.h
@@ -39,4 +39,8 @@ DEF_HELPER_FLAGS_3(sub, 0, tl, env, tl, tl)
 /* interrupt */
 DEF_HELPER_FLAGS_1(rfe, 0, void, env)
 
+/* sys */
+DEF_HELPER_FLAGS_4(mtspr, 0, void, env, tl, tl, tl)
+DEF_HELPER_FLAGS_4(mfspr, 0, void, env, tl, tl, tl)
+
 #include "def-helper.h"
diff --git a/target-openrisc/sys_helper.c b/target-openrisc/sys_helper.c
new file mode 100644
index 0000000..59e9f20
--- /dev/null
+++ b/target-openrisc/sys_helper.c
@@ -0,0 +1,227 @@
+/*
+ * OpenRISC system-insns helper routines
+ *
+ *  Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *                          Zhizhou Zhang <etouzh@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
+ */
+
+#include "cpu.h"
+#include "helper.h"
+
+#define TO_SPR(group, number) (((group)<<11)+(number))
+void HELPER(mtspr)(CPUOPENRISCState * env,
+                   target_ulong ra, target_ulong rb, uint32_t offset)
+{
+#if !defined(CONFIG_USER_ONLY)
+    int spr = env->gpr[ra] | offset;
+    int idx;
+
+    switch (spr) {
+    case TO_SPR(0, 16): /* NPC */
+        env->npc = env->gpr[rb];
+        break;
+
+    case TO_SPR(0, 17): /* SR */
+        if ((env->sr & (SR_IME | SR_DME | SR_SM)) ^
+            (env->gpr[rb] & (SR_IME | SR_DME | SR_SM))) {
+            tlb_flush(env, 1);
+        }
+        env->sr = env->gpr[rb];
+        env->sr |= SR_FO;      /* FO is const equal to 1 */
+        if (env->sr & SR_DME) {
+            env->map_address_data = &get_phys_data;
+        } else {
+            env->map_address_data = &get_phys_nommu;
+        }
+
+        if (env->sr & SR_IME) {
+            env->map_address_code = &get_phys_code;
+        } else {
+            env->map_address_code = &get_phys_nommu;
+        }
+        break;
+
+    case TO_SPR(0, 18): /* PPC */
+        env->ppc = env->gpr[rb];
+        break;
+
+    case TO_SPR(0, 32): /* EPCR */
+        env->epcr = env->gpr[rb];
+        break;
+
+    case TO_SPR(0, 48): /* EEAR */
+        env->eear = env->gpr[rb];
+        break;
+
+    case TO_SPR(0, 64): /* ESR */
+        env->esr = env->gpr[rb];
+        break;
+    case TO_SPR(1, 512) ... TO_SPR(1, 639): /* DTLBW0MR 0-127 */
+        idx = spr - TO_SPR(1, 512);
+        if (!(env->gpr[rb] & 1)) {
+            tlb_flush_page(env, env->dtlb[0][idx].mr & TARGET_PAGE_MASK);
+        }
+        env->dtlb[0][idx].mr = env->gpr[rb];
+        break;
+
+    case TO_SPR(1, 640) ... TO_SPR(1, 767): /* DTLBW0TR 0-127 */
+        idx = spr - TO_SPR(1, 640);
+        env->dtlb[0][idx].tr = env->gpr[rb];
+        break;
+    case TO_SPR(1, 768) ... TO_SPR(1, 895):   /* DTLBW1MR 0-127 */
+    case TO_SPR(1, 896) ... TO_SPR(1, 1023):  /* DTLBW1TR 0-127 */
+    case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
+    case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
+    case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
+    case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
+        break;
+    case TO_SPR(2, 512) ... TO_SPR(2, 639):   /* ITLBW0MR 0-127 */
+        idx = spr - TO_SPR(2, 512);
+        if (!(env->gpr[rb] & 1)) {
+            tlb_flush_page(env, env->itlb[0][idx].mr & TARGET_PAGE_MASK);
+        }
+        env->itlb[0][idx].mr = env->gpr[rb];
+        break;
+
+    case TO_SPR(2, 640) ... TO_SPR(2, 767): /* ITLBW0TR 0-127 */
+        idx = spr - TO_SPR(2, 640);
+        env->itlb[0][idx].tr = env->gpr[rb];
+    case TO_SPR(2, 768) ... TO_SPR(2, 895):   /* ITLBW1MR 0-127 */
+    case TO_SPR(2, 896) ... TO_SPR(2, 1023):  /* ITLBW1TR 0-127 */
+    case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
+    case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
+    case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
+    case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
+        break;
+    case TO_SPR(9, 0):  /* PICMR */
+        cpu_openrisc_store_picmr(env, env->gpr[rb]);
+        break;
+    case TO_SPR(9, 2):  /* PICSR */
+        cpu_openrisc_store_picsr(env, env->gpr[rb]);
+        break;
+    case TO_SPR(10, 0): /* TTMR */
+        cpu_openrisc_store_compare(env, env->gpr[rb]);
+        break;
+    case TO_SPR(10, 1): /* TTCR */
+        cpu_openrisc_store_count(env, env->gpr[rb]);
+        break;
+    default:
+        break;
+    }
+#endif
+}
+
+void HELPER(mfspr)(CPUOPENRISCState * env,
+                   target_ulong rd, target_ulong ra, uint32_t offset)
+{
+#if !defined(CONFIG_USER_ONLY)
+    int spr = env->gpr[ra] | offset;
+    int idx;
+
+    switch (spr) {
+    case TO_SPR(0, 0): /* VR */
+        env->gpr[rd] = SPR_VR;
+        break;
+
+    case TO_SPR(0, 1): /* UPR */
+        env->gpr[rd] = 0x619;    /* TT, DM, IM, UP present */
+        break;
+
+    case TO_SPR(0, 2): /* CPUCFGR */
+        env->gpr[rd] = 0x000000a0;
+        break;
+
+    case TO_SPR(0, 3): /* DMMUCFGR */
+        env->gpr[rd] = 0x18;    /* 1Way, 64 entries */
+        break;
+    case TO_SPR(0, 4): /* IMMUCFGR */
+        env->gpr[rd] = 0x18;
+        break;
+
+    case TO_SPR(0, 16): /* NPC */
+        env->gpr[rd] = env->npc;
+        break;
+
+    case TO_SPR(0, 17): /* SR */
+        env->gpr[rd] = env->sr;
+        break;
+
+    case TO_SPR(0, 18): /* PPC */
+        env->gpr[rd] = env->ppc;
+        break;
+
+    case TO_SPR(0, 32): /* EPCR */
+        env->gpr[rd] = env->epcr;
+        break;
+
+    case TO_SPR(0, 48): /* EEAR */
+        env->gpr[rd] = env->eear;
+        break;
+
+    case TO_SPR(0, 64): /* ESR */
+        env->gpr[rd] = env->esr;
+        break;
+    case TO_SPR(1, 512) ... TO_SPR(1, 639): /* DTLBW0MR 0-127 */
+        idx = spr - TO_SPR(1, 512);
+        env->gpr[rd] = env->dtlb[0][idx].mr;
+        break;
+
+    case TO_SPR(1, 640) ... TO_SPR(1, 767): /* DTLBW0TR 0-127 */
+        idx = spr - TO_SPR(1, 640);
+        env->gpr[rd] = env->dtlb[0][idx].tr;
+        break;
+    case TO_SPR(1, 768) ... TO_SPR(1, 895):   /* DTLBW1MR 0-127 */
+    case TO_SPR(1, 896) ... TO_SPR(1, 1023):  /* DTLBW1TR 0-127 */
+    case TO_SPR(1, 1024) ... TO_SPR(1, 1151): /* DTLBW2MR 0-127 */
+    case TO_SPR(1, 1152) ... TO_SPR(1, 1279): /* DTLBW2TR 0-127 */
+    case TO_SPR(1, 1280) ... TO_SPR(1, 1407): /* DTLBW3MR 0-127 */
+    case TO_SPR(1, 1408) ... TO_SPR(1, 1535): /* DTLBW3TR 0-127 */
+        break;
+
+    case TO_SPR(2, 512) ... TO_SPR(2, 639): /* ITLBW0MR 0-127 */
+        idx = spr - TO_SPR(2, 512);
+        env->gpr[rd] = env->itlb[0][idx].mr;
+        break;
+
+    case TO_SPR(2, 640) ... TO_SPR(2, 767): /* ITLBW0TR 0-127 */
+        idx = spr - TO_SPR(2, 640);
+        env->gpr[rd] = env->itlb[0][idx].tr;
+        break;
+    case TO_SPR(2, 768) ... TO_SPR(2, 895):   /* ITLBW1MR 0-127 */
+    case TO_SPR(2, 896) ... TO_SPR(2, 1023):  /* ITLBW1TR 0-127 */
+    case TO_SPR(2, 1024) ... TO_SPR(2, 1151): /* ITLBW2MR 0-127 */
+    case TO_SPR(2, 1152) ... TO_SPR(2, 1279): /* ITLBW2TR 0-127 */
+    case TO_SPR(2, 1280) ... TO_SPR(2, 1407): /* ITLBW3MR 0-127 */
+    case TO_SPR(2, 1408) ... TO_SPR(2, 1535): /* ITLBW3TR 0-127 */
+        break;
+    case TO_SPR(9, 0):  /* PICMR */
+        env->gpr[rd] = env->picmr;
+        break;
+    case TO_SPR(9, 2):  /* PICSR */
+        env->gpr[rd] = env->picsr;
+        break;
+    case TO_SPR(10, 0): /* TTMR */
+        env->gpr[rd] = env->ttmr;
+        break;
+    case TO_SPR(10, 1): /* TTCR */
+        env->gpr[rd] = cpu_openrisc_get_count(env);
+        break;
+    default:
+        break;
+    }
+#endif
+}
diff --git a/target-openrisc/translate.c b/target-openrisc/translate.c
index 7d942b5..7617a34 100644
--- a/target-openrisc/translate.c
+++ b/target-openrisc/translate.c
@@ -704,7 +704,7 @@ static void dec_misc(DisasContext *dc, CPUOPENRISCState *env, uint32_t insn)
             TCGv_i32 ti = tcg_const_i32(I16);
             TCGv td = tcg_const_tl(rd);
             TCGv ta = tcg_const_tl(ra);
-            /* mfspr need a helper here */
+            gen_helper_mfspr(cpu_env, td, ta, ti);
             tcg_temp_free_i32(ti);
             tcg_temp_free(td);
             tcg_temp_free(ta);
@@ -717,7 +717,7 @@ static void dec_misc(DisasContext *dc, CPUOPENRISCState *env, uint32_t insn)
             TCGv_i32 ti = tcg_const_i32(tmp);
             TCGv ta = tcg_const_tl(ra);
             TCGv tb = tcg_const_tl(rb);
-            /* mtspr need a helper here */
+            gen_helper_mtspr(cpu_env, ta, tb, ti);
             tcg_temp_free_i32(ti);
             tcg_temp_free(ta);
             tcg_temp_free(tb);
-- 
1.7.9.5