Scripted conversion: sed -i "s/CPUState/CPUM68KState/g" target-m68k/*.[hc] sed -i "s/#define CPUM68KState/#define CPUState/" target-m68k/cpu.h Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Anthony Liguori <aliguori@us.ibm.com>
251 lines
5.7 KiB
C
251 lines
5.7 KiB
C
/*
|
|
* M68K helper routines
|
|
*
|
|
* Copyright (c) 2007 CodeSourcery
|
|
*
|
|
* 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 "cpu.h"
|
|
#include "dyngen-exec.h"
|
|
#include "helpers.h"
|
|
|
|
#if defined(CONFIG_USER_ONLY)
|
|
|
|
void do_interrupt(CPUM68KState *env1)
|
|
{
|
|
env1->exception_index = -1;
|
|
}
|
|
|
|
void do_interrupt_m68k_hardirq(CPUM68KState *env1)
|
|
{
|
|
}
|
|
|
|
#else
|
|
|
|
extern int semihosting_enabled;
|
|
|
|
#include "softmmu_exec.h"
|
|
|
|
#define MMUSUFFIX _mmu
|
|
|
|
#define SHIFT 0
|
|
#include "softmmu_template.h"
|
|
|
|
#define SHIFT 1
|
|
#include "softmmu_template.h"
|
|
|
|
#define SHIFT 2
|
|
#include "softmmu_template.h"
|
|
|
|
#define SHIFT 3
|
|
#include "softmmu_template.h"
|
|
|
|
/* Try to fill the TLB and return an exception if error. If retaddr is
|
|
NULL, it means that the function was called in C code (i.e. not
|
|
from generated code or from helper.c) */
|
|
/* XXX: fix it to restore all registers */
|
|
void tlb_fill(CPUM68KState *env1, target_ulong addr, int is_write, int mmu_idx,
|
|
void *retaddr)
|
|
{
|
|
TranslationBlock *tb;
|
|
CPUM68KState *saved_env;
|
|
unsigned long pc;
|
|
int ret;
|
|
|
|
saved_env = env;
|
|
env = env1;
|
|
ret = cpu_m68k_handle_mmu_fault(env, addr, is_write, mmu_idx);
|
|
if (unlikely(ret)) {
|
|
if (retaddr) {
|
|
/* now we have a real cpu fault */
|
|
pc = (unsigned long)retaddr;
|
|
tb = tb_find_pc(pc);
|
|
if (tb) {
|
|
/* the PC is inside the translated code. It means that we have
|
|
a virtual CPU fault */
|
|
cpu_restore_state(tb, env, pc);
|
|
}
|
|
}
|
|
cpu_loop_exit(env);
|
|
}
|
|
env = saved_env;
|
|
}
|
|
|
|
static void do_rte(void)
|
|
{
|
|
uint32_t sp;
|
|
uint32_t fmt;
|
|
|
|
sp = env->aregs[7];
|
|
fmt = ldl_kernel(sp);
|
|
env->pc = ldl_kernel(sp + 4);
|
|
sp |= (fmt >> 28) & 3;
|
|
env->sr = fmt & 0xffff;
|
|
m68k_switch_sp(env);
|
|
env->aregs[7] = sp + 8;
|
|
}
|
|
|
|
static void do_interrupt_all(int is_hw)
|
|
{
|
|
uint32_t sp;
|
|
uint32_t fmt;
|
|
uint32_t retaddr;
|
|
uint32_t vector;
|
|
|
|
fmt = 0;
|
|
retaddr = env->pc;
|
|
|
|
if (!is_hw) {
|
|
switch (env->exception_index) {
|
|
case EXCP_RTE:
|
|
/* Return from an exception. */
|
|
do_rte();
|
|
return;
|
|
case EXCP_HALT_INSN:
|
|
if (semihosting_enabled
|
|
&& (env->sr & SR_S) != 0
|
|
&& (env->pc & 3) == 0
|
|
&& lduw_code(env->pc - 4) == 0x4e71
|
|
&& ldl_code(env->pc) == 0x4e7bf000) {
|
|
env->pc += 4;
|
|
do_m68k_semihosting(env, env->dregs[0]);
|
|
return;
|
|
}
|
|
env->halted = 1;
|
|
env->exception_index = EXCP_HLT;
|
|
cpu_loop_exit(env);
|
|
return;
|
|
}
|
|
if (env->exception_index >= EXCP_TRAP0
|
|
&& env->exception_index <= EXCP_TRAP15) {
|
|
/* Move the PC after the trap instruction. */
|
|
retaddr += 2;
|
|
}
|
|
}
|
|
|
|
vector = env->exception_index << 2;
|
|
|
|
sp = env->aregs[7];
|
|
|
|
fmt |= 0x40000000;
|
|
fmt |= (sp & 3) << 28;
|
|
fmt |= vector << 16;
|
|
fmt |= env->sr;
|
|
|
|
env->sr |= SR_S;
|
|
if (is_hw) {
|
|
env->sr = (env->sr & ~SR_I) | (env->pending_level << SR_I_SHIFT);
|
|
env->sr &= ~SR_M;
|
|
}
|
|
m68k_switch_sp(env);
|
|
|
|
/* ??? This could cause MMU faults. */
|
|
sp &= ~3;
|
|
sp -= 4;
|
|
stl_kernel(sp, retaddr);
|
|
sp -= 4;
|
|
stl_kernel(sp, fmt);
|
|
env->aregs[7] = sp;
|
|
/* Jump to vector. */
|
|
env->pc = ldl_kernel(env->vbr + vector);
|
|
}
|
|
|
|
void do_interrupt(CPUM68KState *env1)
|
|
{
|
|
CPUM68KState *saved_env;
|
|
|
|
saved_env = env;
|
|
env = env1;
|
|
do_interrupt_all(0);
|
|
env = saved_env;
|
|
}
|
|
|
|
void do_interrupt_m68k_hardirq(CPUM68KState *env1)
|
|
{
|
|
CPUM68KState *saved_env;
|
|
|
|
saved_env = env;
|
|
env = env1;
|
|
do_interrupt_all(1);
|
|
env = saved_env;
|
|
}
|
|
#endif
|
|
|
|
static void raise_exception(int tt)
|
|
{
|
|
env->exception_index = tt;
|
|
cpu_loop_exit(env);
|
|
}
|
|
|
|
void HELPER(raise_exception)(uint32_t tt)
|
|
{
|
|
raise_exception(tt);
|
|
}
|
|
|
|
void HELPER(divu)(CPUM68KState *env, uint32_t word)
|
|
{
|
|
uint32_t num;
|
|
uint32_t den;
|
|
uint32_t quot;
|
|
uint32_t rem;
|
|
uint32_t flags;
|
|
|
|
num = env->div1;
|
|
den = env->div2;
|
|
/* ??? This needs to make sure the throwing location is accurate. */
|
|
if (den == 0)
|
|
raise_exception(EXCP_DIV0);
|
|
quot = num / den;
|
|
rem = num % den;
|
|
flags = 0;
|
|
/* Avoid using a PARAM1 of zero. This breaks dyngen because it uses
|
|
the address of a symbol, and gcc knows symbols can't have address
|
|
zero. */
|
|
if (word && quot > 0xffff)
|
|
flags |= CCF_V;
|
|
if (quot == 0)
|
|
flags |= CCF_Z;
|
|
else if ((int32_t)quot < 0)
|
|
flags |= CCF_N;
|
|
env->div1 = quot;
|
|
env->div2 = rem;
|
|
env->cc_dest = flags;
|
|
}
|
|
|
|
void HELPER(divs)(CPUM68KState *env, uint32_t word)
|
|
{
|
|
int32_t num;
|
|
int32_t den;
|
|
int32_t quot;
|
|
int32_t rem;
|
|
int32_t flags;
|
|
|
|
num = env->div1;
|
|
den = env->div2;
|
|
if (den == 0)
|
|
raise_exception(EXCP_DIV0);
|
|
quot = num / den;
|
|
rem = num % den;
|
|
flags = 0;
|
|
if (word && quot != (int16_t)quot)
|
|
flags |= CCF_V;
|
|
if (quot == 0)
|
|
flags |= CCF_Z;
|
|
else if (quot < 0)
|
|
flags |= CCF_N;
|
|
env->div1 = quot;
|
|
env->div2 = rem;
|
|
env->cc_dest = flags;
|
|
}
|