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-rw-r--r--target-tricore/helper.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/target-tricore/helper.c b/target-tricore/helper.c
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+++ b/target-tricore/helper.c
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+/*
+ * Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <signal.h>
+
+#include "cpu.h"
+
+enum {
+ TLBRET_DIRTY = -4,
+ TLBRET_INVALID = -3,
+ TLBRET_NOMATCH = -2,
+ TLBRET_BADADDR = -1,
+ TLBRET_MATCH = 0
+};
+
+#if defined(CONFIG_SOFTMMU)
+static int get_physical_address(CPUTriCoreState *env, hwaddr *physical,
+ int *prot, target_ulong address,
+ int rw, int access_type)
+{
+ int ret = TLBRET_MATCH;
+
+ *physical = address & 0xFFFFFFFF;
+ *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
+
+ return ret;
+}
+#endif
+
+/* TODO: Add exeption support*/
+static void raise_mmu_exception(CPUTriCoreState *env, target_ulong address,
+ int rw, int tlb_error)
+{
+}
+
+int cpu_tricore_handle_mmu_fault(CPUState *cs, target_ulong address,
+ int rw, int mmu_idx)
+{
+ TriCoreCPU *cpu = TRICORE_CPU(cs);
+ CPUTriCoreState *env = &cpu->env;
+ hwaddr physical;
+ int prot;
+ int access_type;
+ int ret = 0;
+
+ rw &= 1;
+ access_type = ACCESS_INT;
+ ret = get_physical_address(env, &physical, &prot,
+ address, rw, access_type);
+ qemu_log("%s address=" TARGET_FMT_lx " ret %d physical " TARGET_FMT_plx
+ " prot %d\n", __func__, address, ret, physical, prot);
+
+ if (ret == TLBRET_MATCH) {
+ tlb_set_page(cs, address & TARGET_PAGE_MASK,
+ physical & TARGET_PAGE_MASK, prot | PAGE_EXEC,
+ mmu_idx, TARGET_PAGE_SIZE);
+ ret = 0;
+ } else if (ret < 0) {
+ raise_mmu_exception(env, address, rw, ret);
+ ret = 1;
+ }
+
+ return ret;
+}
+
+TriCoreCPU *cpu_tricore_init(const char *cpu_model)
+{
+ return TRICORE_CPU(cpu_generic_init(TYPE_TRICORE_CPU, cpu_model));
+}
+
+static void tricore_cpu_list_entry(gpointer data, gpointer user_data)
+{
+ ObjectClass *oc = data;
+ CPUListState *s = user_data;
+ const char *typename;
+ char *name;
+
+ typename = object_class_get_name(oc);
+ name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_TRICORE_CPU));
+ (*s->cpu_fprintf)(s->file, " %s\n",
+ name);
+ g_free(name);
+}
+
+void tricore_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+ CPUListState s = {
+ .file = f,
+ .cpu_fprintf = cpu_fprintf,
+ };
+ GSList *list;
+
+ list = object_class_get_list(TYPE_TRICORE_CPU, false);
+ (*cpu_fprintf)(f, "Available CPUs:\n");
+ g_slist_foreach(list, tricore_cpu_list_entry, &s);
+ g_slist_free(list);
+}
+
+uint32_t psw_read(CPUTriCoreState *env)
+{
+ /* clear all USB bits */
+ env->PSW &= 0xffffff;
+ /* now set them from the cache */
+ env->PSW |= ((env->PSW_USB_C != 0) << 31);
+ env->PSW |= ((env->PSW_USB_V & (1 << 31)) >> 1);
+ env->PSW |= ((env->PSW_USB_SV & (1 << 31)) >> 2);
+ env->PSW |= ((env->PSW_USB_AV & (1 << 31)) >> 3);
+ env->PSW |= ((env->PSW_USB_SAV & (1 << 31)) >> 4);
+
+ return env->PSW;
+}
+
+void psw_write(CPUTriCoreState *env, uint32_t val)
+{
+ env->PSW_USB_C = (val & MASK_USB_C);
+ env->PSW_USB_V = (val & MASK_USB_V << 1);
+ env->PSW_USB_SV = (val & MASK_USB_SV << 2);
+ env->PSW_USB_AV = ((val & MASK_USB_AV) << 3);
+ env->PSW_USB_SAV = ((val & MASK_USB_SAV) << 4);
+ env->PSW = val;
+}