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

/*
 *  CRIS mmu emulation.
 *
 *  Copyright (c) 2007 AXIS Communications AB
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef CONFIG_USER_ONLY

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "config.h"
#include "cpu.h"
#include "mmu.h"
#include "exec-all.h"

#define D(x)

static int cris_mmu_enabled(uint32_t rw_gc_cfg)
{
	return (rw_gc_cfg & 12) != 0;
}

static int cris_mmu_segmented_addr(int seg, uint32_t rw_mm_cfg)
{
	return (1 << seg) & rw_mm_cfg;
}

static uint32_t cris_mmu_translate_seg(CPUState *env, int seg)
{
	uint32_t base;
	int i;

	if (seg < 8)
		base = env->sregs[SFR_RW_MM_KBASE_LO];
	else
		base = env->sregs[SFR_RW_MM_KBASE_HI];

	i = seg & 7;
	base >>= i * 4;
	base &= 15;

	base <<= 28;
	return base;
}
/* Used by the tlb decoder.  */
#define EXTRACT_FIELD(src, start, end) \
	    (((src) >> start) & ((1 << (end - start + 1)) - 1))

static inline void set_field(uint32_t *dst, unsigned int val, 
			     unsigned int offset, unsigned int width)
{
	uint32_t mask;

	mask = (1 << width) - 1;
	mask <<= offset;
	val <<= offset;

	val &= mask;
	*dst &= ~(mask);
	*dst |= val;
}

static void dump_tlb(CPUState *env, int mmu)
{
	int set;
	int idx;
	uint32_t hi, lo, tlb_vpn, tlb_pfn;

	for (set = 0; set < 4; set++) {
		for (idx = 0; idx < 16; idx++) {
			lo = env->tlbsets[mmu][set][idx].lo;
			hi = env->tlbsets[mmu][set][idx].hi;
			tlb_vpn = EXTRACT_FIELD(hi, 13, 31);
			tlb_pfn = EXTRACT_FIELD(lo, 13, 31);

			printf ("TLB: [%d][%d] hi=%x lo=%x v=%x p=%x\n", 
					set, idx, hi, lo, tlb_vpn, tlb_pfn);
		}
	}
}

/* rw 0 = read, 1 = write, 2 = exec.  */
static int cris_mmu_translate_page(struct cris_mmu_result_t *res,
				   CPUState *env, uint32_t vaddr,
				   int rw, int usermode)
{
	unsigned int vpage;
	unsigned int idx;
	uint32_t lo, hi;
	uint32_t tlb_vpn, tlb_pfn = 0;
	int tlb_pid, tlb_g, tlb_v, tlb_k, tlb_w, tlb_x;
	int cfg_v, cfg_k, cfg_w, cfg_x;	
	int set, match = 0;
	uint32_t r_cause;
	uint32_t r_cfg;
	int rwcause;
	int mmu = 1; /* Data mmu is default.  */
	int vect_base;

	r_cause = env->sregs[SFR_R_MM_CAUSE];
	r_cfg = env->sregs[SFR_RW_MM_CFG];

	switch (rw) {
		case 2: rwcause = CRIS_MMU_ERR_EXEC; mmu = 0; break;
		case 1: rwcause = CRIS_MMU_ERR_WRITE; break;
		default:
		case 0: rwcause = CRIS_MMU_ERR_READ; break;
	}

	/* I exception vectors 4 - 7, D 8 - 11.  */
	vect_base = (mmu + 1) * 4;

	vpage = vaddr >> 13;

	/* We know the index which to check on each set.
	   Scan both I and D.  */
#if 0
	for (set = 0; set < 4; set++) {
		for (idx = 0; idx < 16; idx++) {
			lo = env->tlbsets[mmu][set][idx].lo;
			hi = env->tlbsets[mmu][set][idx].hi;
			tlb_vpn = EXTRACT_FIELD(hi, 13, 31);
			tlb_pfn = EXTRACT_FIELD(lo, 13, 31);

			printf ("TLB: [%d][%d] hi=%x lo=%x v=%x p=%x\n", 
					set, idx, hi, lo, tlb_vpn, tlb_pfn);
		}
	}
#endif

	idx = vpage & 15;
	for (set = 0; set < 4; set++)
	{
		lo = env->tlbsets[mmu][set][idx].lo;
		hi = env->tlbsets[mmu][set][idx].hi;

		tlb_vpn = EXTRACT_FIELD(hi, 13, 31);
		tlb_pfn = EXTRACT_FIELD(lo, 13, 31);

		D(printf("TLB[%d][%d] v=%x vpage=%x -> pfn=%x lo=%x hi=%x\n", 
				i, idx, tlb_vpn, vpage, tlb_pfn, lo, hi));
		if (tlb_vpn == vpage) {
			match = 1;
			break;
		}
	}

	res->bf_vec = vect_base;
	if (match) {
		cfg_w  = EXTRACT_FIELD(r_cfg, 19, 19);
		cfg_k  = EXTRACT_FIELD(r_cfg, 18, 18);
		cfg_x  = EXTRACT_FIELD(r_cfg, 17, 17);
		cfg_v  = EXTRACT_FIELD(r_cfg, 16, 16);

		tlb_pid = EXTRACT_FIELD(hi, 0, 7);
		tlb_pfn = EXTRACT_FIELD(lo, 13, 31);
		tlb_g  = EXTRACT_FIELD(lo, 4, 4);
		tlb_v = EXTRACT_FIELD(lo, 3, 3);
		tlb_k = EXTRACT_FIELD(lo, 2, 2);
		tlb_w = EXTRACT_FIELD(lo, 1, 1);
		tlb_x = EXTRACT_FIELD(lo, 0, 0);

		/*
		set_exception_vector(0x04, i_mmu_refill);
		set_exception_vector(0x05, i_mmu_invalid);
		set_exception_vector(0x06, i_mmu_access);
		set_exception_vector(0x07, i_mmu_execute);
		set_exception_vector(0x08, d_mmu_refill);
		set_exception_vector(0x09, d_mmu_invalid);
		set_exception_vector(0x0a, d_mmu_access);
		set_exception_vector(0x0b, d_mmu_write);
		*/
		if (!tlb_g 
		    && tlb_pid != (env->pregs[PR_PID] & 0xff)) {
			D(printf ("tlb: wrong pid %x %x pc=%x\n", 
				 tlb_pid, env->pregs[PR_PID], env->pc));
			match = 0;
			res->bf_vec = vect_base;
		} else if (rw == 1 && cfg_w && !tlb_w) {
			D(printf ("tlb: write protected %x lo=%x\n", 
				vaddr, lo));
			match = 0;
			res->bf_vec = vect_base + 3;
		} else if (cfg_v && !tlb_v) {
			D(printf ("tlb: invalid %x\n", vaddr));
			set_field(&r_cause, rwcause, 8, 9);
			match = 0;
			res->bf_vec = vect_base + 1;
		}

		res->prot = 0;
		if (match) {
			res->prot |= PAGE_READ;
			if (tlb_w)
				res->prot |= PAGE_WRITE;
			if (tlb_x)
				res->prot |= PAGE_EXEC;
		}
		else
			D(dump_tlb(env, mmu));

		env->sregs[SFR_RW_MM_TLB_HI] = hi;
		env->sregs[SFR_RW_MM_TLB_LO] = lo;
	}

	if (!match) {
		/* miss.  */
		idx = vpage & 15;
		set = 0;

		/* Update RW_MM_TLB_SEL.  */
		env->sregs[SFR_RW_MM_TLB_SEL] = 0;
		set_field(&env->sregs[SFR_RW_MM_TLB_SEL], idx, 0, 4);
		set_field(&env->sregs[SFR_RW_MM_TLB_SEL], set, 4, 5);

		/* Update RW_MM_CAUSE.  */
		set_field(&r_cause, rwcause, 8, 2);
		set_field(&r_cause, vpage, 13, 19);
		set_field(&r_cause, env->pregs[PR_PID], 0, 8);
		env->sregs[SFR_R_MM_CAUSE] = r_cause;
		D(printf("refill vaddr=%x pc=%x\n", vaddr, env->pc));
	}


	D(printf ("%s rw=%d mtch=%d pc=%x va=%x vpn=%x tlbvpn=%x pfn=%x pid=%x"
		  " %x cause=%x sel=%x sp=%x %x %x\n",
		  __func__, rw, match, env->pc,
		  vaddr, vpage,
		  tlb_vpn, tlb_pfn, tlb_pid, 
		  env->pregs[PR_PID],
		  r_cause,
		  env->sregs[SFR_RW_MM_TLB_SEL],
		  env->regs[R_SP], env->pregs[PR_USP], env->ksp));

	res->pfn = tlb_pfn;
	return !match;
}

/* Give us the vaddr corresponding to the latest TLB update.  */
target_ulong cris_mmu_tlb_latest_update(CPUState *env, uint32_t new_lo)
{
	uint32_t sel = env->sregs[SFR_RW_MM_TLB_SEL];
	uint32_t vaddr;
	uint32_t hi;
	int set;
	int idx;

	idx = EXTRACT_FIELD(sel, 0, 4);
	set = EXTRACT_FIELD(sel, 4, 5);

	hi = env->tlbsets[1][set][idx].hi;
	vaddr = EXTRACT_FIELD(hi, 13, 31);
	return vaddr << TARGET_PAGE_BITS;
}

int cris_mmu_translate(struct cris_mmu_result_t *res,
		       CPUState *env, uint32_t vaddr,
		       int rw, int mmu_idx)
{
	uint32_t phy = vaddr;
	int seg;
	int miss = 0;
	int is_user = mmu_idx == MMU_USER_IDX;
	uint32_t old_srs;

	old_srs= env->pregs[PR_SRS];

	/* rw == 2 means exec, map the access to the insn mmu.  */
	env->pregs[PR_SRS] = rw == 2 ? 1 : 2;

	if (!cris_mmu_enabled(env->sregs[SFR_RW_GC_CFG])) {
		res->phy = vaddr;
		res->prot = PAGE_BITS;		
		goto done;
	}

	seg = vaddr >> 28;
	if (cris_mmu_segmented_addr(seg, env->sregs[SFR_RW_MM_CFG]))
	{
		uint32_t base;

		miss = 0;
		base = cris_mmu_translate_seg(env, seg);
		phy = base | (0x0fffffff & vaddr);
		res->phy = phy;
		res->prot = PAGE_BITS;		
	}
	else
	{
		miss = cris_mmu_translate_page(res, env, vaddr, rw, is_user);
		phy = (res->pfn << 13);
		res->phy = phy;
	}
  done:
	env->pregs[PR_SRS] = old_srs;
	return miss;
}
#endif
Commit	Line	Data
94cff60a TS	1	/*
	2	* CRIS mmu emulation.
	3	*
	4	* Copyright (c) 2007 AXIS Communications AB
	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
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#ifndef CONFIG_USER_ONLY
	23
	24	#include <stdio.h>
	25	#include <string.h>
	26	#include <stdlib.h>
	27
	28	#include "config.h"
	29	#include "cpu.h"
	30	#include "mmu.h"
	31	#include "exec-all.h"
	32
786c02f1	33	#define D(x)
94cff60a TS	34
	35	static int cris_mmu_enabled(uint32_t rw_gc_cfg)
	36	{
	37	return (rw_gc_cfg & 12) != 0;
	38	}
	39
	40	static int cris_mmu_segmented_addr(int seg, uint32_t rw_mm_cfg)
	41	{
	42	return (1 << seg) & rw_mm_cfg;
	43	}
	44
	45	static uint32_t cris_mmu_translate_seg(CPUState *env, int seg)
	46	{
	47	uint32_t base;
	48	int i;
	49
	50	if (seg < 8)
	51	base = env->sregs[SFR_RW_MM_KBASE_LO];
	52	else
	53	base = env->sregs[SFR_RW_MM_KBASE_HI];
	54
	55	i = seg & 7;
	56	base >>= i * 4;
	57	base &= 15;
	58
	59	base <<= 28;
	60	return base;
	61	}
	62	/* Used by the tlb decoder. */
	63	#define EXTRACT_FIELD(src, start, end) \
786c02f1 EI	64	(((src) >> start) & ((1 << (end - start + 1)) - 1))
	65
	66	static inline void set_field(uint32_t *dst, unsigned int val,
	67	unsigned int offset, unsigned int width)
	68	{
	69	uint32_t mask;
	70
	71	mask = (1 << width) - 1;
	72	mask <<= offset;
	73	val <<= offset;
	74
	75	val &= mask;
786c02f1 EI	76	*dst &= ~(mask);
	77	*dst \|= val;
	78	}
94cff60a	79
b41f7df0 EI	80	static void dump_tlb(CPUState *env, int mmu)
	81	{
	82	int set;
	83	int idx;
	84	uint32_t hi, lo, tlb_vpn, tlb_pfn;
	85
	86	for (set = 0; set < 4; set++) {
	87	for (idx = 0; idx < 16; idx++) {
	88	lo = env->tlbsets[mmu][set][idx].lo;
	89	hi = env->tlbsets[mmu][set][idx].hi;
	90	tlb_vpn = EXTRACT_FIELD(hi, 13, 31);
	91	tlb_pfn = EXTRACT_FIELD(lo, 13, 31);
	92
	93	printf ("TLB: [%d][%d] hi=%x lo=%x v=%x p=%x\n",
	94	set, idx, hi, lo, tlb_vpn, tlb_pfn);
	95	}
	96	}
	97	}
	98
	99	/* rw 0 = read, 1 = write, 2 = exec. */
94cff60a TS	100	static int cris_mmu_translate_page(struct cris_mmu_result_t *res,
	101	CPUState *env, uint32_t vaddr,
	102	int rw, int usermode)
	103	{
	104	unsigned int vpage;
	105	unsigned int idx;
	106	uint32_t lo, hi;
786c02f1 EI	107	uint32_t tlb_vpn, tlb_pfn = 0;
	108	int tlb_pid, tlb_g, tlb_v, tlb_k, tlb_w, tlb_x;
	109	int cfg_v, cfg_k, cfg_w, cfg_x;
b41f7df0	110	int set, match = 0;
786c02f1 EI	111	uint32_t r_cause;
	112	uint32_t r_cfg;
	113	int rwcause;
b41f7df0 EI	114	int mmu = 1; /* Data mmu is default. */
b41f7df0 EI	115	int vect_base;
786c02f1 EI	116
	117	r_cause = env->sregs[SFR_R_MM_CAUSE];
	118	r_cfg = env->sregs[SFR_RW_MM_CFG];
b41f7df0 EI	119
	120	switch (rw) {
	121	case 2: rwcause = CRIS_MMU_ERR_EXEC; mmu = 0; break;
	122	case 1: rwcause = CRIS_MMU_ERR_WRITE; break;
	123	default:
	124	case 0: rwcause = CRIS_MMU_ERR_READ; break;
	125	}
	126
	127	/* I exception vectors 4 - 7, D 8 - 11. */
	128	vect_base = (mmu + 1) * 4;
94cff60a TS	129
94cff60a TS	130	vpage = vaddr >> 13;
94cff60a TS	131
	132	/* We know the index which to check on each set.
	133	Scan both I and D. */
786c02f1	134	#if 0
b41f7df0 EI	135	for (set = 0; set < 4; set++) {
	136	for (idx = 0; idx < 16; idx++) {
	137	lo = env->tlbsets[mmu][set][idx].lo;
	138	hi = env->tlbsets[mmu][set][idx].hi;
786c02f1 EI	139	tlb_vpn = EXTRACT_FIELD(hi, 13, 31);
	140	tlb_pfn = EXTRACT_FIELD(lo, 13, 31);
	141
	142	printf ("TLB: [%d][%d] hi=%x lo=%x v=%x p=%x\n",
b41f7df0	143	set, idx, hi, lo, tlb_vpn, tlb_pfn);
786c02f1 EI	144	}
	145	}
	146	#endif
b41f7df0 EI	147
	148	idx = vpage & 15;
	149	for (set = 0; set < 4; set++)
94cff60a	150	{
b41f7df0 EI	151	lo = env->tlbsets[mmu][set][idx].lo;
b41f7df0 EI	152	hi = env->tlbsets[mmu][set][idx].hi;
94cff60a	153
786c02f1 EI	154	tlb_vpn = EXTRACT_FIELD(hi, 13, 31);
786c02f1 EI	155	tlb_pfn = EXTRACT_FIELD(lo, 13, 31);
94cff60a	156
b41f7df0 EI	157	D(printf("TLB[%d][%d] v=%x vpage=%x -> pfn=%x lo=%x hi=%x\n",
b41f7df0 EI	158	i, idx, tlb_vpn, vpage, tlb_pfn, lo, hi));
786c02f1	159	if (tlb_vpn == vpage) {
94cff60a TS	160	match = 1;
	161	break;
	162	}
	163	}
	164
b41f7df0	165	res->bf_vec = vect_base;
94cff60a	166	if (match) {
786c02f1 EI	167	cfg_w = EXTRACT_FIELD(r_cfg, 19, 19);
	168	cfg_k = EXTRACT_FIELD(r_cfg, 18, 18);
	169	cfg_x = EXTRACT_FIELD(r_cfg, 17, 17);
	170	cfg_v = EXTRACT_FIELD(r_cfg, 16, 16);
	171
	172	tlb_pid = EXTRACT_FIELD(hi, 0, 7);
	173	tlb_pfn = EXTRACT_FIELD(lo, 13, 31);
	174	tlb_g = EXTRACT_FIELD(lo, 4, 4);
	175	tlb_v = EXTRACT_FIELD(lo, 3, 3);
	176	tlb_k = EXTRACT_FIELD(lo, 2, 2);
	177	tlb_w = EXTRACT_FIELD(lo, 1, 1);
	178	tlb_x = EXTRACT_FIELD(lo, 0, 0);
	179
	180	/*
	181	set_exception_vector(0x04, i_mmu_refill);
	182	set_exception_vector(0x05, i_mmu_invalid);
	183	set_exception_vector(0x06, i_mmu_access);
	184	set_exception_vector(0x07, i_mmu_execute);
	185	set_exception_vector(0x08, d_mmu_refill);
	186	set_exception_vector(0x09, d_mmu_invalid);
	187	set_exception_vector(0x0a, d_mmu_access);
	188	set_exception_vector(0x0b, d_mmu_write);
	189	*/
b41f7df0 EI	190	if (!tlb_g
	191	&& tlb_pid != (env->pregs[PR_PID] & 0xff)) {
	192	D(printf ("tlb: wrong pid %x %x pc=%x\n",
	193	tlb_pid, env->pregs[PR_PID], env->pc));
786c02f1	194	match = 0;
b41f7df0 EI	195	res->bf_vec = vect_base;
	196	} else if (rw == 1 && cfg_w && !tlb_w) {
	197	D(printf ("tlb: write protected %x lo=%x\n",
	198	vaddr, lo));
786c02f1	199	match = 0;
b41f7df0 EI	200	res->bf_vec = vect_base + 3;
	201	} else if (cfg_v && !tlb_v) {
	202	D(printf ("tlb: invalid %x\n", vaddr));
	203	set_field(&r_cause, rwcause, 8, 9);
786c02f1	204	match = 0;
b41f7df0	205	res->bf_vec = vect_base + 1;
786c02f1	206	}
786c02f1	207
b41f7df0 EI	208	res->prot = 0;
	209	if (match) {
	210	res->prot \|= PAGE_READ;
	211	if (tlb_w)
	212	res->prot \|= PAGE_WRITE;
	213	if (tlb_x)
	214	res->prot \|= PAGE_EXEC;
	215	}
	216	else
	217	D(dump_tlb(env, mmu));
	218
	219	env->sregs[SFR_RW_MM_TLB_HI] = hi;
	220	env->sregs[SFR_RW_MM_TLB_LO] = lo;
786c02f1 EI	221	}
	222
	223	if (!match) {
b41f7df0 EI	224	/* miss. */
	225	idx = vpage & 15;
	226	set = 0;
	227
	228	/* Update RW_MM_TLB_SEL. */
	229	env->sregs[SFR_RW_MM_TLB_SEL] = 0;
	230	set_field(&env->sregs[SFR_RW_MM_TLB_SEL], idx, 0, 4);
	231	set_field(&env->sregs[SFR_RW_MM_TLB_SEL], set, 4, 5);
	232
	233	/* Update RW_MM_CAUSE. */
	234	set_field(&r_cause, rwcause, 8, 2);
786c02f1 EI	235	set_field(&r_cause, vpage, 13, 19);
	236	set_field(&r_cause, env->pregs[PR_PID], 0, 8);
	237	env->sregs[SFR_R_MM_CAUSE] = r_cause;
b41f7df0	238	D(printf("refill vaddr=%x pc=%x\n", vaddr, env->pc));
94cff60a	239	}
b41f7df0 EI	240
	241
	242	D(printf ("%s rw=%d mtch=%d pc=%x va=%x vpn=%x tlbvpn=%x pfn=%x pid=%x"
	243	" %x cause=%x sel=%x sp=%x %x %x\n",
	244	__func__, rw, match, env->pc,
786c02f1 EI	245	vaddr, vpage,
	246	tlb_vpn, tlb_pfn, tlb_pid,
	247	env->pregs[PR_PID],
	248	r_cause,
	249	env->sregs[SFR_RW_MM_TLB_SEL],
b41f7df0	250	env->regs[R_SP], env->pregs[PR_USP], env->ksp));
786c02f1 EI	251
786c02f1 EI	252	res->pfn = tlb_pfn;
94cff60a TS	253	return !match;
	254	}
	255
786c02f1 EI	256	/* Give us the vaddr corresponding to the latest TLB update. */
	257	target_ulong cris_mmu_tlb_latest_update(CPUState *env, uint32_t new_lo)
	258	{
	259	uint32_t sel = env->sregs[SFR_RW_MM_TLB_SEL];
	260	uint32_t vaddr;
	261	uint32_t hi;
	262	int set;
	263	int idx;
	264
	265	idx = EXTRACT_FIELD(sel, 0, 4);
	266	set = EXTRACT_FIELD(sel, 4, 5);
	267
	268	hi = env->tlbsets[1][set][idx].hi;
	269	vaddr = EXTRACT_FIELD(hi, 13, 31);
	270	return vaddr << TARGET_PAGE_BITS;
	271	}
	272
94cff60a TS	273	int cris_mmu_translate(struct cris_mmu_result_t *res,
94cff60a TS	274	CPUState *env, uint32_t vaddr,
6ebbf390	275	int rw, int mmu_idx)
94cff60a TS	276	{
	277	uint32_t phy = vaddr;
	278	int seg;
	279	int miss = 0;
786c02f1	280	int is_user = mmu_idx == MMU_USER_IDX;
b41f7df0 EI	281	uint32_t old_srs;
	282
	283	old_srs= env->pregs[PR_SRS];
	284
	285	/* rw == 2 means exec, map the access to the insn mmu. */
	286	env->pregs[PR_SRS] = rw == 2 ? 1 : 2;
94cff60a TS	287
	288	if (!cris_mmu_enabled(env->sregs[SFR_RW_GC_CFG])) {
	289	res->phy = vaddr;
b41f7df0 EI	290	res->prot = PAGE_BITS;
b41f7df0 EI	291	goto done;
94cff60a TS	292	}
	293
	294	seg = vaddr >> 28;
	295	if (cris_mmu_segmented_addr(seg, env->sregs[SFR_RW_MM_CFG]))
	296	{
	297	uint32_t base;
	298
	299	miss = 0;
	300	base = cris_mmu_translate_seg(env, seg);
	301	phy = base \| (0x0fffffff & vaddr);
	302	res->phy = phy;
b41f7df0	303	res->prot = PAGE_BITS;
94cff60a TS	304	}
	305	else
	306	{
	307	miss = cris_mmu_translate_page(res, env, vaddr, rw, is_user);
b41f7df0 EI	308	phy = (res->pfn << 13);
b41f7df0 EI	309	res->phy = phy;
94cff60a	310	}
b41f7df0 EI	311	done:
b41f7df0 EI	312	env->pregs[PR_SRS] = old_srs;
94cff60a TS	313	return miss;
	314	}
	315	#endif