diff options
Diffstat (limited to 'target/tricore/helper.c')
| -rw-r--r-- | target/tricore/helper.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/target/tricore/helper.c b/target/tricore/helper.c new file mode 100644 index 0000000000..3118905eca --- /dev/null +++ b/target/tricore/helper.c @@ -0,0 +1,146 @@ +/* + * 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); +} |