1 /* 2 * Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 16 */ 17 18 #include "qemu/osdep.h" 19 20 #include "cpu.h" 21 #include "exec/exec-all.h" 22 #include "fpu/softfloat.h" 23 24 enum { 25 TLBRET_DIRTY = -4, 26 TLBRET_INVALID = -3, 27 TLBRET_NOMATCH = -2, 28 TLBRET_BADADDR = -1, 29 TLBRET_MATCH = 0 30 }; 31 32 #if defined(CONFIG_SOFTMMU) 33 static int get_physical_address(CPUTriCoreState *env, hwaddr *physical, 34 int *prot, target_ulong address, 35 int rw, int access_type) 36 { 37 int ret = TLBRET_MATCH; 38 39 *physical = address & 0xFFFFFFFF; 40 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; 41 42 return ret; 43 } 44 #endif 45 46 /* TODO: Add exeption support*/ 47 static void raise_mmu_exception(CPUTriCoreState *env, target_ulong address, 48 int rw, int tlb_error) 49 { 50 } 51 52 int cpu_tricore_handle_mmu_fault(CPUState *cs, target_ulong address, 53 int rw, int mmu_idx) 54 { 55 TriCoreCPU *cpu = TRICORE_CPU(cs); 56 CPUTriCoreState *env = &cpu->env; 57 hwaddr physical; 58 int prot; 59 int access_type; 60 int ret = 0; 61 62 rw &= 1; 63 access_type = ACCESS_INT; 64 ret = get_physical_address(env, &physical, &prot, 65 address, rw, access_type); 66 qemu_log_mask(CPU_LOG_MMU, "%s address=" TARGET_FMT_lx " ret %d physical " TARGET_FMT_plx 67 " prot %d\n", __func__, address, ret, physical, prot); 68 69 if (ret == TLBRET_MATCH) { 70 tlb_set_page(cs, address & TARGET_PAGE_MASK, 71 physical & TARGET_PAGE_MASK, prot | PAGE_EXEC, 72 mmu_idx, TARGET_PAGE_SIZE); 73 ret = 0; 74 } else if (ret < 0) { 75 raise_mmu_exception(env, address, rw, ret); 76 ret = 1; 77 } 78 79 return ret; 80 } 81 82 static void tricore_cpu_list_entry(gpointer data, gpointer user_data) 83 { 84 ObjectClass *oc = data; 85 CPUListState *s = user_data; 86 const char *typename; 87 char *name; 88 89 typename = object_class_get_name(oc); 90 name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_TRICORE_CPU)); 91 (*s->cpu_fprintf)(s->file, " %s\n", 92 name); 93 g_free(name); 94 } 95 96 void tricore_cpu_list(FILE *f, fprintf_function cpu_fprintf) 97 { 98 CPUListState s = { 99 .file = f, 100 .cpu_fprintf = cpu_fprintf, 101 }; 102 GSList *list; 103 104 list = object_class_get_list(TYPE_TRICORE_CPU, false); 105 (*cpu_fprintf)(f, "Available CPUs:\n"); 106 g_slist_foreach(list, tricore_cpu_list_entry, &s); 107 g_slist_free(list); 108 } 109 110 void fpu_set_state(CPUTriCoreState *env) 111 { 112 set_float_rounding_mode(env->PSW & MASK_PSW_FPU_RM, &env->fp_status); 113 set_flush_inputs_to_zero(1, &env->fp_status); 114 set_flush_to_zero(1, &env->fp_status); 115 set_default_nan_mode(1, &env->fp_status); 116 } 117 118 uint32_t psw_read(CPUTriCoreState *env) 119 { 120 /* clear all USB bits */ 121 env->PSW &= 0x6ffffff; 122 /* now set them from the cache */ 123 env->PSW |= ((env->PSW_USB_C != 0) << 31); 124 env->PSW |= ((env->PSW_USB_V & (1 << 31)) >> 1); 125 env->PSW |= ((env->PSW_USB_SV & (1 << 31)) >> 2); 126 env->PSW |= ((env->PSW_USB_AV & (1 << 31)) >> 3); 127 env->PSW |= ((env->PSW_USB_SAV & (1 << 31)) >> 4); 128 129 return env->PSW; 130 } 131 132 void psw_write(CPUTriCoreState *env, uint32_t val) 133 { 134 env->PSW_USB_C = (val & MASK_USB_C); 135 env->PSW_USB_V = (val & MASK_USB_V) << 1; 136 env->PSW_USB_SV = (val & MASK_USB_SV) << 2; 137 env->PSW_USB_AV = (val & MASK_USB_AV) << 3; 138 env->PSW_USB_SAV = (val & MASK_USB_SAV) << 4; 139 env->PSW = val; 140 141 fpu_set_state(env); 142 } 143