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 2.1 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-helpers.h" 23 #include "qemu/qemu-print.h" 24 25 enum { 26 TLBRET_DIRTY = -4, 27 TLBRET_INVALID = -3, 28 TLBRET_NOMATCH = -2, 29 TLBRET_BADADDR = -1, 30 TLBRET_MATCH = 0 31 }; 32 33 #if defined(CONFIG_SOFTMMU) 34 static int get_physical_address(CPUTriCoreState *env, hwaddr *physical, 35 int *prot, target_ulong address, 36 int rw, int access_type) 37 { 38 int ret = TLBRET_MATCH; 39 40 *physical = address & 0xFFFFFFFF; 41 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; 42 43 return ret; 44 } 45 #endif 46 47 /* TODO: Add exeption support*/ 48 static void raise_mmu_exception(CPUTriCoreState *env, target_ulong address, 49 int rw, int tlb_error) 50 { 51 } 52 53 bool tricore_cpu_tlb_fill(CPUState *cs, vaddr address, int size, 54 MMUAccessType rw, int mmu_idx, 55 bool probe, uintptr_t retaddr) 56 { 57 TriCoreCPU *cpu = TRICORE_CPU(cs); 58 CPUTriCoreState *env = &cpu->env; 59 hwaddr physical; 60 int prot; 61 int access_type; 62 int ret = 0; 63 64 rw &= 1; 65 access_type = ACCESS_INT; 66 ret = get_physical_address(env, &physical, &prot, 67 address, rw, access_type); 68 69 qemu_log_mask(CPU_LOG_MMU, "%s address=" TARGET_FMT_lx " ret %d physical " 70 TARGET_FMT_plx " prot %d\n", 71 __func__, (target_ulong)address, ret, physical, prot); 72 73 if (ret == TLBRET_MATCH) { 74 tlb_set_page(cs, address & TARGET_PAGE_MASK, 75 physical & TARGET_PAGE_MASK, prot | PAGE_EXEC, 76 mmu_idx, TARGET_PAGE_SIZE); 77 return true; 78 } else { 79 assert(ret < 0); 80 if (probe) { 81 return false; 82 } 83 raise_mmu_exception(env, address, rw, ret); 84 cpu_loop_exit_restore(cs, retaddr); 85 } 86 } 87 88 static void tricore_cpu_list_entry(gpointer data, gpointer user_data) 89 { 90 ObjectClass *oc = data; 91 const char *typename; 92 char *name; 93 94 typename = object_class_get_name(oc); 95 name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_TRICORE_CPU)); 96 qemu_printf(" %s\n", name); 97 g_free(name); 98 } 99 100 void tricore_cpu_list(void) 101 { 102 GSList *list; 103 104 list = object_class_get_list_sorted(TYPE_TRICORE_CPU, false); 105 qemu_printf("Available CPUs:\n"); 106 g_slist_foreach(list, tricore_cpu_list_entry, NULL); 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