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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 2.1 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"
#include "fpu/softfloat-helpers.h"
#include "qemu/qemu-print.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,
MMUAccessType access_type, int mmu_idx)
{
int ret = TLBRET_MATCH;
*physical = address & 0xFFFFFFFF;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return ret;
}
hwaddr tricore_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
TriCoreCPU *cpu = TRICORE_CPU(cs);
hwaddr phys_addr;
int prot;
int mmu_idx = cpu_mmu_index(&cpu->env, false);
if (get_physical_address(&cpu->env, &phys_addr, &prot, addr,
MMU_DATA_LOAD, mmu_idx)) {
return -1;
}
return phys_addr;
}
#endif
/* TODO: Add exeption support*/
static void raise_mmu_exception(CPUTriCoreState *env, target_ulong address,
int rw, int tlb_error)
{
}
bool tricore_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
MMUAccessType rw, int mmu_idx,
bool probe, uintptr_t retaddr)
{
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
hwaddr physical;
int prot;
int ret = 0;
rw &= 1;
ret = get_physical_address(env, &physical, &prot,
address, rw, mmu_idx);
qemu_log_mask(CPU_LOG_MMU, "%s address=" TARGET_FMT_lx " ret %d physical "
TARGET_FMT_plx " prot %d\n",
__func__, (target_ulong)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);
return true;
} else {
assert(ret < 0);
if (probe) {
return false;
}
raise_mmu_exception(env, address, rw, ret);
cpu_loop_exit_restore(cs, retaddr);
}
}
static void tricore_cpu_list_entry(gpointer data, gpointer user_data)
{
ObjectClass *oc = data;
const char *typename;
char *name;
typename = object_class_get_name(oc);
name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_TRICORE_CPU));
qemu_printf(" %s\n", name);
g_free(name);
}
void tricore_cpu_list(void)
{
GSList *list;
list = object_class_get_list_sorted(TYPE_TRICORE_CPU, false);
qemu_printf("Available CPUs:\n");
g_slist_foreach(list, tricore_cpu_list_entry, NULL);
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);
}
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