/* * 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 "qemu/osdep.h" #include "cpu.h" #include "exec/exec-all.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_mask(CPU_LOG_MMU, "%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); } void fpu_set_state(CPUTriCoreState *env) { set_float_rounding_mode(env->PSW & MASK_PSW_FPU_RM, &env->fp_status); set_flush_inputs_to_zero(1, &env->fp_status); set_flush_to_zero(1, &env->fp_status); set_default_nan_mode(1, &env->fp_status); } uint32_t psw_read(CPUTriCoreState *env) { /* clear all USB bits */ env->PSW &= 0x6ffffff; /* 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; fpu_set_state(env); }