[qemu.git] / target-cris / op_helper.c

/*
 *  CRIS helper routines
 *
 *  Copyright (c) 2007 AXIS Communications
 *  Written by Edgar E. Iglesias
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA  02110-1301 USA
 */

#include <assert.h>
#include "exec.h"
#include "mmu.h"
#include "helper.h"

#define D(x)

#if !defined(CONFIG_USER_ONLY)

#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 (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
{
    TranslationBlock *tb;
    CPUState *saved_env;
    unsigned long pc;
    int ret;

    /* XXX: hack to restore env in all cases, even if not called from
       generated code */
    saved_env = env;
    env = cpu_single_env;

    D(fprintf(logfile, "%s pc=%x tpc=%x ra=%x\n", __func__, 
	     env->pc, env->debug1, retaddr));
    ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
    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, NULL);

		/* Evaluate flags after retranslation.  */
                helper_top_evaluate_flags();
            }
        }
        cpu_loop_exit();
    }
    env = saved_env;
}

#endif

void helper_raise_exception(uint32_t index)
{
	env->exception_index = index;
	cpu_loop_exit();
}

void helper_tlb_flush_pid(uint32_t pid)
{
#if !defined(CONFIG_USER_ONLY)
	pid &= 0xff;
	if (pid != (env->pregs[PR_PID] & 0xff))
		cris_mmu_flush_pid(env, env->pregs[PR_PID]);
#endif
}

void helper_spc_write(uint32_t new_spc)
{
#if !defined(CONFIG_USER_ONLY)
	tlb_flush_page(env, env->pregs[PR_SPC]);
	tlb_flush_page(env, new_spc);
#endif
}

void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
{
	(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1)); 
}

/* Used by the tlb decoder.  */
#define EXTRACT_FIELD(src, start, end) \
	    (((src) >> start) & ((1 << (end - start + 1)) - 1))

void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
{
	uint32_t srs;
	srs = env->pregs[PR_SRS];
	srs &= 3;
	env->sregs[srs][sreg] = env->regs[reg];

#if !defined(CONFIG_USER_ONLY)
	if (srs == 1 || srs == 2) {
		if (sreg == 6) {
			/* Writes to tlb-hi write to mm_cause as a side 
			   effect.  */
			env->sregs[SFR_RW_MM_TLB_HI] = env->regs[reg];
			env->sregs[SFR_R_MM_CAUSE] = env->regs[reg];
		}
		else if (sreg == 5) {
			uint32_t set;
			uint32_t idx;
			uint32_t lo, hi;
			uint32_t vaddr;
			int tlb_v;

			idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
			set >>= 4;
			set &= 3;

			idx &= 15;
			/* We've just made a write to tlb_lo.  */
			lo = env->sregs[SFR_RW_MM_TLB_LO];
			/* Writes are done via r_mm_cause.  */
			hi = env->sregs[SFR_R_MM_CAUSE];

			vaddr = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].hi,
					      13, 31);
			vaddr <<= TARGET_PAGE_BITS;
			tlb_v = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].lo,
					    3, 3);
			env->tlbsets[srs - 1][set][idx].lo = lo;
			env->tlbsets[srs - 1][set][idx].hi = hi;

			D(fprintf(logfile, 
				  "tlb flush vaddr=%x v=%d pc=%x\n", 
				  vaddr, tlb_v, env->pc));
			tlb_flush_page(env, vaddr);
		}
	}
#endif
}

void helper_movl_reg_sreg (uint32_t reg, uint32_t sreg)
{
	uint32_t srs;
	env->pregs[PR_SRS] &= 3;
	srs = env->pregs[PR_SRS];
	
#if !defined(CONFIG_USER_ONLY)
	if (srs == 1 || srs == 2)
	{
		uint32_t set;
		uint32_t idx;
		uint32_t lo, hi;

		idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
		set >>= 4;
		set &= 3;
		idx &= 15;

		/* Update the mirror regs.  */
		hi = env->tlbsets[srs - 1][set][idx].hi;
		lo = env->tlbsets[srs - 1][set][idx].lo;
		env->sregs[SFR_RW_MM_TLB_HI] = hi;
		env->sregs[SFR_RW_MM_TLB_LO] = lo;
	}
#endif
	env->regs[reg] = env->sregs[srs][sreg];
}

static void cris_ccs_rshift(CPUState *env)
{
	uint32_t ccs;

	/* Apply the ccs shift.  */
	ccs = env->pregs[PR_CCS];
	ccs = (ccs & 0xc0000000) | ((ccs & 0x0fffffff) >> 10);
	if (ccs & U_FLAG)
	{
		/* Enter user mode.  */
		env->ksp = env->regs[R_SP];
		env->regs[R_SP] = env->pregs[PR_USP];
	}

	env->pregs[PR_CCS] = ccs;
}

void helper_rfe(void)
{
	int rflag = env->pregs[PR_CCS] & R_FLAG;

	D(fprintf(logfile, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n", 
		 env->pregs[PR_ERP], env->pregs[PR_PID],
		 env->pregs[PR_CCS],
		 env->btarget));

	cris_ccs_rshift(env);

	/* RFE sets the P_FLAG only if the R_FLAG is not set.  */
	if (!rflag)
		env->pregs[PR_CCS] |= P_FLAG;
}

void helper_rfn(void)
{
	int rflag = env->pregs[PR_CCS] & R_FLAG;

	D(fprintf(logfile, "rfn: erp=%x pid=%x ccs=%x btarget=%x\n", 
		 env->pregs[PR_ERP], env->pregs[PR_PID],
		 env->pregs[PR_CCS],
		 env->btarget));

	cris_ccs_rshift(env);

	/* Set the P_FLAG only if the R_FLAG is not set.  */
	if (!rflag)
		env->pregs[PR_CCS] |= P_FLAG;

    /* Always set the M flag.  */
    env->pregs[PR_CCS] |= M_FLAG;
}

uint32_t helper_btst(uint32_t t0, uint32_t t1, uint32_t ccs)
{
	/* FIXME: clean this up.  */

	/* des ref:
	   The N flag is set according to the selected bit in the dest reg.
	   The Z flag is set if the selected bit and all bits to the right are
	   zero.
	   The X flag is cleared.
	   Other flags are left untouched.
	   The destination reg is not affected.*/
	unsigned int fz, sbit, bset, mask, masked_t0;

	sbit = t1 & 31;
	bset = !!(t0 & (1 << sbit));
	mask = sbit == 31 ? -1 : (1 << (sbit + 1)) - 1;
	masked_t0 = t0 & mask;
	fz = !(masked_t0 | bset);

	/* Clear the X, N and Z flags.  */
	ccs = ccs & ~(X_FLAG | N_FLAG | Z_FLAG);
	/* Set the N and Z flags accordingly.  */
	ccs |= (bset << 3) | (fz << 2);
	return ccs;
}

static void evaluate_flags_writeback(uint32_t flags)
{
	unsigned int x, z, mask;

	/* Extended arithmetics, leave the z flag alone.  */
	x = env->cc_x;
	mask = env->cc_mask | X_FLAG;
        if (x) {
		z = flags & Z_FLAG;
		mask = mask & ~z;
	}
	flags &= mask;

	/* all insn clear the x-flag except setf or clrf.  */
	env->pregs[PR_CCS] &= ~mask;
	env->pregs[PR_CCS] |= flags;
}

void helper_evaluate_flags_muls(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;
	int64_t tmp;
	int32_t mof;
	int dneg;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;

	dneg = ((int32_t)res) < 0;

	mof = env->pregs[PR_MOF];
	tmp = mof;
	tmp <<= 32;
	tmp |= res;
	if (tmp == 0)
		flags |= Z_FLAG;
	else if (tmp < 0)
		flags |= N_FLAG;
	if ((dneg && mof != -1)
	    || (!dneg && mof != 0))
		flags |= V_FLAG;
	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_mulu(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;
	uint64_t tmp;
	uint32_t mof;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;

	mof = env->pregs[PR_MOF];
	tmp = mof;
	tmp <<= 32;
	tmp |= res;
	if (tmp == 0)
		flags |= Z_FLAG;
	else if (tmp >> 63)
		flags |= N_FLAG;
	if (mof)
		flags |= V_FLAG;

	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_mcp(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;

	src = env->cc_src & 0x80000000;
	dst = env->cc_dest & 0x80000000;
	res = env->cc_result;

	if ((res & 0x80000000L) != 0L)
	{
		flags |= N_FLAG;
		if (!src && !dst)
			flags |= V_FLAG;
		else if (src & dst)
			flags |= R_FLAG;
	}
	else
	{
		if (res == 0L)
			flags |= Z_FLAG;
		if (src & dst) 
			flags |= V_FLAG;
		if (dst | src) 
			flags |= R_FLAG;
	}

	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_alu_4(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;

	src = env->cc_src & 0x80000000;
	dst = env->cc_dest & 0x80000000;
	res = env->cc_result;

	if ((res & 0x80000000L) != 0L)
	{
		flags |= N_FLAG;
		if (!src && !dst)
			flags |= V_FLAG;
		else if (src & dst)
			flags |= C_FLAG;
	}
	else
	{
		if (res == 0L)
			flags |= Z_FLAG;
		if (src & dst) 
			flags |= V_FLAG;
		if (dst | src) 
			flags |= C_FLAG;
	}

	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_sub_4(void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;

	src = (~env->cc_src) & 0x80000000;
	dst = env->cc_dest & 0x80000000;
	res = env->cc_result;

	if ((res & 0x80000000L) != 0L)
	{
		flags |= N_FLAG;
		if (!src && !dst)
			flags |= V_FLAG;
		else if (src & dst)
			flags |= C_FLAG;
	}
	else
	{
		if (res == 0L)
			flags |= Z_FLAG;
		if (src & dst) 
			flags |= V_FLAG;
		if (dst | src) 
			flags |= C_FLAG;
	}

	flags ^= C_FLAG;
	evaluate_flags_writeback(flags);
}

void  helper_evaluate_flags_move_4 (void)
{
	uint32_t res;
	uint32_t flags = 0;

	res = env->cc_result;

	if ((int32_t)res < 0)
		flags |= N_FLAG;
	else if (res == 0L)
		flags |= Z_FLAG;

	evaluate_flags_writeback(flags);
}
void  helper_evaluate_flags_move_2 (void)
{
	uint32_t src;
	uint32_t flags = 0;
	uint16_t res;

	src = env->cc_src;
	res = env->cc_result;

	if ((int16_t)res < 0L)
		flags |= N_FLAG;
	else if (res == 0)
		flags |= Z_FLAG;

	evaluate_flags_writeback(flags);
}

/* TODO: This is expensive. We could split things up and only evaluate part of
   CCR on a need to know basis. For now, we simply re-evaluate everything.  */
void helper_evaluate_flags (void)
{
	uint32_t src;
	uint32_t dst;
	uint32_t res;
	uint32_t flags = 0;

	src = env->cc_src;
	dst = env->cc_dest;
	res = env->cc_result;

	if (env->cc_op == CC_OP_SUB || env->cc_op == CC_OP_CMP)
		src = ~src;

	/* Now, evaluate the flags. This stuff is based on
	   Per Zander's CRISv10 simulator.  */
	switch (env->cc_size)
	{
		case 1:
			if ((res & 0x80L) != 0L)
			{
				flags |= N_FLAG;
				if (((src & 0x80L) == 0L)
				    && ((dst & 0x80L) == 0L))
				{
					flags |= V_FLAG;
				}
				else if (((src & 0x80L) != 0L)
					 && ((dst & 0x80L) != 0L))
				{
					flags |= C_FLAG;
				}
			}
			else
			{
				if ((res & 0xFFL) == 0L)
				{
					flags |= Z_FLAG;
				}
				if (((src & 0x80L) != 0L)
				    && ((dst & 0x80L) != 0L))
				{
					flags |= V_FLAG;
				}
				if ((dst & 0x80L) != 0L
				    || (src & 0x80L) != 0L)
				{
					flags |= C_FLAG;
				}
			}
			break;
		case 2:
			if ((res & 0x8000L) != 0L)
			{
				flags |= N_FLAG;
				if (((src & 0x8000L) == 0L)
				    && ((dst & 0x8000L) == 0L))
				{
					flags |= V_FLAG;
				}
				else if (((src & 0x8000L) != 0L)
					 && ((dst & 0x8000L) != 0L))
				{
					flags |= C_FLAG;
				}
			}
			else
			{
				if ((res & 0xFFFFL) == 0L)
				{
					flags |= Z_FLAG;
				}
				if (((src & 0x8000L) != 0L)
				    && ((dst & 0x8000L) != 0L))
				{
					flags |= V_FLAG;
				}
				if ((dst & 0x8000L) != 0L
				    || (src & 0x8000L) != 0L)
				{
					flags |= C_FLAG;
				}
			}
			break;
		case 4:
			if ((res & 0x80000000L) != 0L)
			{
				flags |= N_FLAG;
				if (((src & 0x80000000L) == 0L)
				    && ((dst & 0x80000000L) == 0L))
				{
					flags |= V_FLAG;
				}
				else if (((src & 0x80000000L) != 0L) &&
					 ((dst & 0x80000000L) != 0L))
				{
					flags |= C_FLAG;
				}
			}
			else
			{
				if (res == 0L)
					flags |= Z_FLAG;
				if (((src & 0x80000000L) != 0L)
				    && ((dst & 0x80000000L) != 0L))
					flags |= V_FLAG;
				if ((dst & 0x80000000L) != 0L
				    || (src & 0x80000000L) != 0L)
					flags |= C_FLAG;
			}
			break;
		default:
			break;
	}

	if (env->cc_op == CC_OP_SUB
	    || env->cc_op == CC_OP_CMP) {
		flags ^= C_FLAG;
	}
	evaluate_flags_writeback(flags);
}

void helper_top_evaluate_flags(void)
{
	switch (env->cc_op)
	{
		case CC_OP_MCP:
			helper_evaluate_flags_mcp();
			break;
		case CC_OP_MULS:
			helper_evaluate_flags_muls();
			break;
		case CC_OP_MULU:
			helper_evaluate_flags_mulu();
			break;
		case CC_OP_MOVE:
		case CC_OP_AND:
		case CC_OP_OR:
		case CC_OP_XOR:
		case CC_OP_ASR:
		case CC_OP_LSR:
		case CC_OP_LSL:
			switch (env->cc_size)
			{
				case 4:
					helper_evaluate_flags_move_4();
					break;
				case 2:
					helper_evaluate_flags_move_2();
					break;
				default:
					helper_evaluate_flags();
					break;
			}
			break;
		case CC_OP_FLAGS:
			/* live.  */
			break;
		case CC_OP_SUB:
		case CC_OP_CMP:
			if (env->cc_size == 4)
				helper_evaluate_flags_sub_4();
			else
				helper_evaluate_flags();
			break;
		default:
		{
			switch (env->cc_size)
			{
				case 4:
					helper_evaluate_flags_alu_4();
					break;
				default:
					helper_evaluate_flags();
					break;
			}
		}
		break;
	}
}
Commit	Line	Data
81fdc5f8 TS	1	/*
	2	* CRIS helper routines
	3	*
	4	* Copyright (c) 2007 AXIS Communications
	5	* Written by Edgar E. Iglesias
	6	*
	7	* This library is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2 of the License, or (at your option) any later version.
	11	*
	12	* This library is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with this library; if not, write to the Free Software
fad6cb1a	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
81fdc5f8 TS	20	*/
	21
	22	#include <assert.h>
	23	#include "exec.h"
786c02f1	24	#include "mmu.h"
30abcfc7	25	#include "helper.h"
81fdc5f8	26
e2eef170 PB	27	#define D(x)
	28
	29	#if !defined(CONFIG_USER_ONLY)
	30
81fdc5f8	31	#define MMUSUFFIX _mmu
81fdc5f8 TS	32
	33	#define SHIFT 0
	34	#include "softmmu_template.h"
	35
	36	#define SHIFT 1
	37	#include "softmmu_template.h"
	38
	39	#define SHIFT 2
	40	#include "softmmu_template.h"
	41
	42	#define SHIFT 3
	43	#include "softmmu_template.h"
	44
	45	/* Try to fill the TLB and return an exception if error. If retaddr is
	46	NULL, it means that the function was called in C code (i.e. not
	47	from generated code or from helper.c) */
	48	/* XXX: fix it to restore all registers */
6ebbf390	49	void tlb_fill (target_ulong addr, int is_write, int mmu_idx, void *retaddr)
81fdc5f8 TS	50	{
	51	TranslationBlock *tb;
	52	CPUState *saved_env;
44f8625d	53	unsigned long pc;
81fdc5f8 TS	54	int ret;
	55
	56	/* XXX: hack to restore env in all cases, even if not called from
	57	generated code */
	58	saved_env = env;
	59	env = cpu_single_env;
b41f7df0	60
ef29a70d EI	61	D(fprintf(logfile, "%s pc=%x tpc=%x ra=%x\n", __func__,
ef29a70d EI	62	env->pc, env->debug1, retaddr));
6ebbf390	63	ret = cpu_cris_handle_mmu_fault(env, addr, is_write, mmu_idx, 1);
551bd27f	64	if (unlikely(ret)) {
81fdc5f8 TS	65	if (retaddr) {
81fdc5f8 TS	66	/* now we have a real cpu fault */
44f8625d	67	pc = (unsigned long)retaddr;
81fdc5f8 TS	68	tb = tb_find_pc(pc);
	69	if (tb) {
	70	/* the PC is inside the translated code. It means that we have
	71	a virtual CPU fault */
	72	cpu_restore_state(tb, env, pc, NULL);
30abcfc7 EI	73
	74	/* Evaluate flags after retranslation. */
	75	helper_top_evaluate_flags();
81fdc5f8 TS	76	}
	77	}
	78	cpu_loop_exit();
	79	}
	80	env = saved_env;
	81	}
	82
e2eef170 PB	83	#endif
e2eef170 PB	84
dceaf394	85	void helper_raise_exception(uint32_t index)
786c02f1	86	{
dceaf394 EI	87	env->exception_index = index;
dceaf394 EI	88	cpu_loop_exit();
786c02f1 EI	89	}
786c02f1 EI	90
cf1d97f0 EI	91	void helper_tlb_flush_pid(uint32_t pid)
	92	{
	93	#if !defined(CONFIG_USER_ONLY)
28de16da EI	94	pid &= 0xff;
	95	if (pid != (env->pregs[PR_PID] & 0xff))
	96	cris_mmu_flush_pid(env, env->pregs[PR_PID]);
cf1d97f0 EI	97	#endif
	98	}
	99
a1aebcb8 EI	100	void helper_spc_write(uint32_t new_spc)
	101	{
	102	#if !defined(CONFIG_USER_ONLY)
	103	tlb_flush_page(env, env->pregs[PR_SPC]);
	104	tlb_flush_page(env, new_spc);
	105	#endif
	106	}
	107
30abcfc7	108	void helper_dump(uint32_t a0, uint32_t a1, uint32_t a2)
b41f7df0 EI	109	{
	110	(fprintf(logfile, "%s: a0=%x a1=%x\n", __func__, a0, a1));
	111	}
	112
cf1d97f0 EI	113	/* Used by the tlb decoder. */
	114	#define EXTRACT_FIELD(src, start, end) \
	115	(((src) >> start) & ((1 << (end - start + 1)) - 1))
	116
dceaf394 EI	117	void helper_movl_sreg_reg (uint32_t sreg, uint32_t reg)
	118	{
	119	uint32_t srs;
	120	srs = env->pregs[PR_SRS];
	121	srs &= 3;
	122	env->sregs[srs][sreg] = env->regs[reg];
	123
	124	#if !defined(CONFIG_USER_ONLY)
	125	if (srs == 1 \|\| srs == 2) {
	126	if (sreg == 6) {
	127	/* Writes to tlb-hi write to mm_cause as a side
	128	effect. */
6913ba56 EI	129	env->sregs[SFR_RW_MM_TLB_HI] = env->regs[reg];
6913ba56 EI	130	env->sregs[SFR_R_MM_CAUSE] = env->regs[reg];
dceaf394 EI	131	}
	132	else if (sreg == 5) {
	133	uint32_t set;
	134	uint32_t idx;
	135	uint32_t lo, hi;
	136	uint32_t vaddr;
cf1d97f0	137	int tlb_v;
dceaf394 EI	138
	139	idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
	140	set >>= 4;
	141	set &= 3;
	142
	143	idx &= 15;
	144	/* We've just made a write to tlb_lo. */
	145	lo = env->sregs[SFR_RW_MM_TLB_LO];
	146	/* Writes are done via r_mm_cause. */
	147	hi = env->sregs[SFR_R_MM_CAUSE];
cf1d97f0 EI	148
	149	vaddr = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].hi,
	150	13, 31);
	151	vaddr <<= TARGET_PAGE_BITS;
	152	tlb_v = EXTRACT_FIELD(env->tlbsets[srs-1][set][idx].lo,
	153	3, 3);
dceaf394 EI	154	env->tlbsets[srs - 1][set][idx].lo = lo;
dceaf394 EI	155	env->tlbsets[srs - 1][set][idx].hi = hi;
cf1d97f0 EI	156
	157	D(fprintf(logfile,
	158	"tlb flush vaddr=%x v=%d pc=%x\n",
	159	vaddr, tlb_v, env->pc));
	160	tlb_flush_page(env, vaddr);
dceaf394 EI	161	}
	162	}
	163	#endif
	164	}
	165
	166	void helper_movl_reg_sreg (uint32_t reg, uint32_t sreg)
	167	{
	168	uint32_t srs;
	169	env->pregs[PR_SRS] &= 3;
	170	srs = env->pregs[PR_SRS];
	171
	172	#if !defined(CONFIG_USER_ONLY)
	173	if (srs == 1 \|\| srs == 2)
	174	{
	175	uint32_t set;
	176	uint32_t idx;
	177	uint32_t lo, hi;
	178
	179	idx = set = env->sregs[SFR_RW_MM_TLB_SEL];
	180	set >>= 4;
	181	set &= 3;
	182	idx &= 15;
	183
	184	/* Update the mirror regs. */
	185	hi = env->tlbsets[srs - 1][set][idx].hi;
	186	lo = env->tlbsets[srs - 1][set][idx].lo;
	187	env->sregs[SFR_RW_MM_TLB_HI] = hi;
	188	env->sregs[SFR_RW_MM_TLB_LO] = lo;
	189	}
	190	#endif
	191	env->regs[reg] = env->sregs[srs][sreg];
dceaf394 EI	192	}
	193
	194	static void cris_ccs_rshift(CPUState *env)
	195	{
	196	uint32_t ccs;
	197
	198	/* Apply the ccs shift. */
	199	ccs = env->pregs[PR_CCS];
	200	ccs = (ccs & 0xc0000000) \| ((ccs & 0x0fffffff) >> 10);
	201	if (ccs & U_FLAG)
	202	{
	203	/* Enter user mode. */
	204	env->ksp = env->regs[R_SP];
	205	env->regs[R_SP] = env->pregs[PR_USP];
	206	}
	207
	208	env->pregs[PR_CCS] = ccs;
	209	}
	210
b41f7df0 EI	211	void helper_rfe(void)
b41f7df0 EI	212	{
bf443337 EI	213	int rflag = env->pregs[PR_CCS] & R_FLAG;
bf443337 EI	214
b41f7df0 EI	215	D(fprintf(logfile, "rfe: erp=%x pid=%x ccs=%x btarget=%x\n",
	216	env->pregs[PR_ERP], env->pregs[PR_PID],
	217	env->pregs[PR_CCS],
	218	env->btarget));
dceaf394 EI	219
	220	cris_ccs_rshift(env);
	221
	222	/* RFE sets the P_FLAG only if the R_FLAG is not set. */
bf443337	223	if (!rflag)
dceaf394	224	env->pregs[PR_CCS] \|= P_FLAG;
b41f7df0 EI	225	}
b41f7df0 EI	226
5bf8f1ab EI	227	void helper_rfn(void)
	228	{
	229	int rflag = env->pregs[PR_CCS] & R_FLAG;
	230
	231	D(fprintf(logfile, "rfn: erp=%x pid=%x ccs=%x btarget=%x\n",
	232	env->pregs[PR_ERP], env->pregs[PR_PID],
	233	env->pregs[PR_CCS],
	234	env->btarget));
	235
	236	cris_ccs_rshift(env);
	237
	238	/* Set the P_FLAG only if the R_FLAG is not set. */
	239	if (!rflag)
	240	env->pregs[PR_CCS] \|= P_FLAG;
	241
	242	/* Always set the M flag. */
	243	env->pregs[PR_CCS] \|= M_FLAG;
	244	}
	245
abd5c94e EI	246	uint32_t helper_btst(uint32_t t0, uint32_t t1, uint32_t ccs)
	247	{
	248	/* FIXME: clean this up. */
	249
	250	/* des ref:
	251	The N flag is set according to the selected bit in the dest reg.
	252	The Z flag is set if the selected bit and all bits to the right are
	253	zero.
	254	The X flag is cleared.
	255	Other flags are left untouched.
	256	The destination reg is not affected.*/
	257	unsigned int fz, sbit, bset, mask, masked_t0;
	258
	259	sbit = t1 & 31;
	260	bset = !!(t0 & (1 << sbit));
	261	mask = sbit == 31 ? -1 : (1 << (sbit + 1)) - 1;
	262	masked_t0 = t0 & mask;
	263	fz = !(masked_t0 \| bset);
	264
	265	/* Clear the X, N and Z flags. */
	266	ccs = ccs & ~(X_FLAG \| N_FLAG \| Z_FLAG);
	267	/* Set the N and Z flags accordingly. */
	268	ccs \|= (bset << 3) \| (fz << 2);
	269	return ccs;
	270	}
	271
b41f7df0 EI	272	static void evaluate_flags_writeback(uint32_t flags)
b41f7df0 EI	273	{
a8cf66bb	274	unsigned int x, z, mask;
b41f7df0 EI	275
b41f7df0 EI	276	/* Extended arithmetics, leave the z flag alone. */
30abcfc7	277	x = env->cc_x;
a8cf66bb EI	278	mask = env->cc_mask \| X_FLAG;
	279	if (x) {
	280	z = flags & Z_FLAG;
	281	mask = mask & ~z;
	282	}
	283	flags &= mask;
b41f7df0 EI	284
b41f7df0 EI	285	/* all insn clear the x-flag except setf or clrf. */
a8cf66bb	286	env->pregs[PR_CCS] &= ~mask;
b41f7df0	287	env->pregs[PR_CCS] \|= flags;
b41f7df0 EI	288	}
	289
	290	void helper_evaluate_flags_muls(void)
	291	{
	292	uint32_t src;
	293	uint32_t dst;
	294	uint32_t res;
	295	uint32_t flags = 0;
dceaf394	296	int64_t tmp;
b41f7df0 EI	297	int32_t mof;
	298	int dneg;
	299
	300	src = env->cc_src;
	301	dst = env->cc_dest;
	302	res = env->cc_result;
	303
b41f7df0 EI	304	dneg = ((int32_t)res) < 0;
b41f7df0 EI	305
dceaf394 EI	306	mof = env->pregs[PR_MOF];
	307	tmp = mof;
	308	tmp <<= 32;
	309	tmp \|= res;
b41f7df0 EI	310	if (tmp == 0)
	311	flags \|= Z_FLAG;
	312	else if (tmp < 0)
	313	flags \|= N_FLAG;
	314	if ((dneg && mof != -1)
	315	\|\| (!dneg && mof != 0))
	316	flags \|= V_FLAG;
	317	evaluate_flags_writeback(flags);
	318	}
	319
	320	void helper_evaluate_flags_mulu(void)
	321	{
	322	uint32_t src;
	323	uint32_t dst;
	324	uint32_t res;
	325	uint32_t flags = 0;
dceaf394	326	uint64_t tmp;
b41f7df0 EI	327	uint32_t mof;
	328
	329	src = env->cc_src;
	330	dst = env->cc_dest;
	331	res = env->cc_result;
	332
dceaf394 EI	333	mof = env->pregs[PR_MOF];
	334	tmp = mof;
	335	tmp <<= 32;
	336	tmp \|= res;
b41f7df0 EI	337	if (tmp == 0)
	338	flags \|= Z_FLAG;
	339	else if (tmp >> 63)
	340	flags \|= N_FLAG;
	341	if (mof)
	342	flags \|= V_FLAG;
	343
	344	evaluate_flags_writeback(flags);
	345	}
	346
	347	void helper_evaluate_flags_mcp(void)
	348	{
	349	uint32_t src;
	350	uint32_t dst;
	351	uint32_t res;
	352	uint32_t flags = 0;
	353
a8cf66bb EI	354	src = env->cc_src & 0x80000000;
a8cf66bb EI	355	dst = env->cc_dest & 0x80000000;
b41f7df0 EI	356	res = env->cc_result;
	357
	358	if ((res & 0x80000000L) != 0L)
	359	{
	360	flags \|= N_FLAG;
a8cf66bb	361	if (!src && !dst)
b41f7df0	362	flags \|= V_FLAG;
a8cf66bb	363	else if (src & dst)
b41f7df0	364	flags \|= R_FLAG;
b41f7df0 EI	365	}
	366	else
	367	{
	368	if (res == 0L)
	369	flags \|= Z_FLAG;
a8cf66bb	370	if (src & dst)
b41f7df0	371	flags \|= V_FLAG;
a8cf66bb	372	if (dst \| src)
b41f7df0 EI	373	flags \|= R_FLAG;
	374	}
	375
	376	evaluate_flags_writeback(flags);
	377	}
	378
	379	void helper_evaluate_flags_alu_4(void)
	380	{
	381	uint32_t src;
	382	uint32_t dst;
	383	uint32_t res;
	384	uint32_t flags = 0;
	385
a8cf66bb EI	386	src = env->cc_src & 0x80000000;
	387	dst = env->cc_dest & 0x80000000;
	388	res = env->cc_result;
30abcfc7	389
a8cf66bb	390	if ((res & 0x80000000L) != 0L)
30abcfc7	391	{
a8cf66bb EI	392	flags \|= N_FLAG;
	393	if (!src && !dst)
	394	flags \|= V_FLAG;
	395	else if (src & dst)
	396	flags \|= C_FLAG;
	397	}
	398	else
	399	{
	400	if (res == 0L)
	401	flags \|= Z_FLAG;
	402	if (src & dst)
	403	flags \|= V_FLAG;
	404	if (dst \| src)
	405	flags \|= C_FLAG;
30abcfc7 EI	406	}
30abcfc7 EI	407
a8cf66bb EI	408	evaluate_flags_writeback(flags);
	409	}
	410
	411	void helper_evaluate_flags_sub_4(void)
	412	{
	413	uint32_t src;
	414	uint32_t dst;
	415	uint32_t res;
	416	uint32_t flags = 0;
	417
	418	src = (~env->cc_src) & 0x80000000;
	419	dst = env->cc_dest & 0x80000000;
	420	res = env->cc_result;
b41f7df0 EI	421
	422	if ((res & 0x80000000L) != 0L)
	423	{
	424	flags \|= N_FLAG;
a8cf66bb	425	if (!src && !dst)
b41f7df0	426	flags \|= V_FLAG;
a8cf66bb	427	else if (src & dst)
b41f7df0	428	flags \|= C_FLAG;
b41f7df0 EI	429	}
	430	else
	431	{
	432	if (res == 0L)
	433	flags \|= Z_FLAG;
a8cf66bb	434	if (src & dst)
b41f7df0	435	flags \|= V_FLAG;
a8cf66bb	436	if (dst \| src)
b41f7df0 EI	437	flags \|= C_FLAG;
	438	}
	439
a8cf66bb	440	flags ^= C_FLAG;
b41f7df0 EI	441	evaluate_flags_writeback(flags);
	442	}
	443
	444	void helper_evaluate_flags_move_4 (void)
	445	{
b41f7df0 EI	446	uint32_t res;
	447	uint32_t flags = 0;
	448
b41f7df0 EI	449	res = env->cc_result;
	450
	451	if ((int32_t)res < 0)
	452	flags \|= N_FLAG;
	453	else if (res == 0L)
	454	flags \|= Z_FLAG;
	455
	456	evaluate_flags_writeback(flags);
	457	}
	458	void helper_evaluate_flags_move_2 (void)
	459	{
	460	uint32_t src;
	461	uint32_t flags = 0;
	462	uint16_t res;
	463
	464	src = env->cc_src;
	465	res = env->cc_result;
	466
	467	if ((int16_t)res < 0L)
	468	flags \|= N_FLAG;
	469	else if (res == 0)
	470	flags \|= Z_FLAG;
	471
	472	evaluate_flags_writeback(flags);
	473	}
	474
	475	/* TODO: This is expensive. We could split things up and only evaluate part of
	476	CCR on a need to know basis. For now, we simply re-evaluate everything. */
	477	void helper_evaluate_flags (void)
	478	{
	479	uint32_t src;
	480	uint32_t dst;
	481	uint32_t res;
	482	uint32_t flags = 0;
	483
	484	src = env->cc_src;
	485	dst = env->cc_dest;
	486	res = env->cc_result;
	487
30abcfc7 EI	488	if (env->cc_op == CC_OP_SUB \|\| env->cc_op == CC_OP_CMP)
30abcfc7 EI	489	src = ~src;
b41f7df0 EI	490
	491	/* Now, evaluate the flags. This stuff is based on
	492	Per Zander's CRISv10 simulator. */
	493	switch (env->cc_size)
	494	{
	495	case 1:
	496	if ((res & 0x80L) != 0L)
	497	{
	498	flags \|= N_FLAG;
	499	if (((src & 0x80L) == 0L)
	500	&& ((dst & 0x80L) == 0L))
	501	{
	502	flags \|= V_FLAG;
	503	}
	504	else if (((src & 0x80L) != 0L)
	505	&& ((dst & 0x80L) != 0L))
	506	{
	507	flags \|= C_FLAG;
	508	}
	509	}
	510	else
	511	{
	512	if ((res & 0xFFL) == 0L)
	513	{
	514	flags \|= Z_FLAG;
	515	}
	516	if (((src & 0x80L) != 0L)
	517	&& ((dst & 0x80L) != 0L))
	518	{
	519	flags \|= V_FLAG;
	520	}
	521	if ((dst & 0x80L) != 0L
	522	\|\| (src & 0x80L) != 0L)
	523	{
	524	flags \|= C_FLAG;
	525	}
	526	}
	527	break;
	528	case 2:
	529	if ((res & 0x8000L) != 0L)
	530	{
	531	flags \|= N_FLAG;
	532	if (((src & 0x8000L) == 0L)
	533	&& ((dst & 0x8000L) == 0L))
	534	{
	535	flags \|= V_FLAG;
	536	}
	537	else if (((src & 0x8000L) != 0L)
	538	&& ((dst & 0x8000L) != 0L))
	539	{
	540	flags \|= C_FLAG;
	541	}
	542	}
	543	else
	544	{
	545	if ((res & 0xFFFFL) == 0L)
	546	{
	547	flags \|= Z_FLAG;
	548	}
	549	if (((src & 0x8000L) != 0L)
	550	&& ((dst & 0x8000L) != 0L))
	551	{
	552	flags \|= V_FLAG;
	553	}
554	if ((dst & 0x8000L) != 0L
555	\|\| (src & 0x8000L) != 0L)
556	{
557	flags \|= C_FLAG;
558	}
559	}
560	break;
561	case 4:
562	if ((res & 0x80000000L) != 0L)
563	{
564	flags \|= N_FLAG;
565	if (((src & 0x80000000L) == 0L)
566	&& ((dst & 0x80000000L) == 0L))
567	{
568	flags \|= V_FLAG;
569	}
570	else if (((src & 0x80000000L) != 0L) &&
571	((dst & 0x80000000L) != 0L))
572	{
573	flags \|= C_FLAG;
574	}
575	}
576	else
577	{
578	if (res == 0L)
579	flags \|= Z_FLAG;
580	if (((src & 0x80000000L) != 0L)
581	&& ((dst & 0x80000000L) != 0L))
582	flags \|= V_FLAG;
583	if ((dst & 0x80000000L) != 0L
584	\|\| (src & 0x80000000L) != 0L)
585	flags \|= C_FLAG;
586	}
587	break;
588	default:
589	break;
590	}
591
592	if (env->cc_op == CC_OP_SUB
593	\|\| env->cc_op == CC_OP_CMP) {
594	flags ^= C_FLAG;
595	}
596	evaluate_flags_writeback(flags);
597	}
30abcfc7 EI	598
	599	void helper_top_evaluate_flags(void)
	600	{
	601	switch (env->cc_op)
	602	{
	603	case CC_OP_MCP:
	604	helper_evaluate_flags_mcp();
	605	break;
	606	case CC_OP_MULS:
	607	helper_evaluate_flags_muls();
	608	break;
	609	case CC_OP_MULU:
	610	helper_evaluate_flags_mulu();
	611	break;
	612	case CC_OP_MOVE:
	613	case CC_OP_AND:
	614	case CC_OP_OR:
	615	case CC_OP_XOR:
	616	case CC_OP_ASR:
	617	case CC_OP_LSR:
	618	case CC_OP_LSL:
	619	switch (env->cc_size)
	620	{
	621	case 4:
	622	helper_evaluate_flags_move_4();
	623	break;
	624	case 2:
	625	helper_evaluate_flags_move_2();
	626	break;
	627	default:
	628	helper_evaluate_flags();
	629	break;
	630	}
	631	break;
	632	case CC_OP_FLAGS:
	633	/* live. */
	634	break;
a8cf66bb EI	635	case CC_OP_SUB:
	636	case CC_OP_CMP:
	637	if (env->cc_size == 4)
	638	helper_evaluate_flags_sub_4();
	639	else
	640	helper_evaluate_flags();
	641	break;
30abcfc7 EI	642	default:
	643	{
	644	switch (env->cc_size)
	645	{
	646	case 4:
	647	helper_evaluate_flags_alu_4();
	648	break;
	649	default:
	650	helper_evaluate_flags();
	651	break;
	652	}
	653	}
	654	break;
	655	}
	656	}