[qemu.git] / target-microblaze / helper.c

/*
 *  MicroBlaze helper routines.
 *
 *  Copyright (c) 2009 Edgar E. Iglesias <[email protected]>
 *  Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
 *
 * 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"
#include "qemu/host-utils.h"
#include "exec/log.h"

#define D(x)

#if defined(CONFIG_USER_ONLY)

void mb_cpu_do_interrupt(CPUState *cs)
{
    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
    CPUMBState *env = &cpu->env;

    cs->exception_index = -1;
    env->res_addr = RES_ADDR_NONE;
    env->regs[14] = env->sregs[SR_PC];
}

int mb_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
                            int mmu_idx)
{
    cs->exception_index = 0xaa;
    cpu_dump_state(cs, stderr, fprintf, 0);
    return 1;
}

#else /* !CONFIG_USER_ONLY */

int mb_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
                            int mmu_idx)
{
    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
    CPUMBState *env = &cpu->env;
    unsigned int hit;
    unsigned int mmu_available;
    int r = 1;
    int prot;

    mmu_available = 0;
    if (cpu->cfg.use_mmu) {
        mmu_available = 1;
        if ((cpu->cfg.pvr == C_PVR_FULL) &&
            (env->pvr.regs[11] & PVR11_USE_MMU) != PVR11_USE_MMU) {
            mmu_available = 0;
        }
    }

    /* Translate if the MMU is available and enabled.  */
    if (mmu_available && (env->sregs[SR_MSR] & MSR_VM)) {
        target_ulong vaddr, paddr;
        struct microblaze_mmu_lookup lu;

        hit = mmu_translate(&env->mmu, &lu, address, rw, mmu_idx);
        if (hit) {
            vaddr = address & TARGET_PAGE_MASK;
            paddr = lu.paddr + vaddr - lu.vaddr;

            qemu_log_mask(CPU_LOG_MMU, "MMU map mmu=%d v=%x p=%x prot=%x\n",
                    mmu_idx, vaddr, paddr, lu.prot);
            tlb_set_page(cs, vaddr, paddr, lu.prot, mmu_idx, TARGET_PAGE_SIZE);
            r = 0;
        } else {
            env->sregs[SR_EAR] = address;
            qemu_log_mask(CPU_LOG_MMU, "mmu=%d miss v=%" VADDR_PRIx "\n",
                                        mmu_idx, address);

            switch (lu.err) {
                case ERR_PROT:
                    env->sregs[SR_ESR] = rw == 2 ? 17 : 16;
                    env->sregs[SR_ESR] |= (rw == 1) << 10;
                    break;
                case ERR_MISS:
                    env->sregs[SR_ESR] = rw == 2 ? 19 : 18;
                    env->sregs[SR_ESR] |= (rw == 1) << 10;
                    break;
                default:
                    abort();
                    break;
            }

            if (cs->exception_index == EXCP_MMU) {
                cpu_abort(cs, "recursive faults\n");
            }

            /* TLB miss.  */
            cs->exception_index = EXCP_MMU;
        }
    } else {
        /* MMU disabled or not available.  */
        address &= TARGET_PAGE_MASK;
        prot = PAGE_BITS;
        tlb_set_page(cs, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
        r = 0;
    }
    return r;
}

void mb_cpu_do_interrupt(CPUState *cs)
{
    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
    CPUMBState *env = &cpu->env;
    uint32_t t;

    /* IMM flag cannot propagate across a branch and into the dslot.  */
    assert(!((env->iflags & D_FLAG) && (env->iflags & IMM_FLAG)));
    assert(!(env->iflags & (DRTI_FLAG | DRTE_FLAG | DRTB_FLAG)));
/*    assert(env->sregs[SR_MSR] & (MSR_EE)); Only for HW exceptions.  */
    env->res_addr = RES_ADDR_NONE;
    switch (cs->exception_index) {
        case EXCP_HW_EXCP:
            if (!(env->pvr.regs[0] & PVR0_USE_EXC_MASK)) {
                qemu_log_mask(LOG_GUEST_ERROR, "Exception raised on system without exceptions!\n");
                return;
            }

            env->regs[17] = env->sregs[SR_PC] + 4;
            env->sregs[SR_ESR] &= ~(1 << 12);

            /* Exception breaks branch + dslot sequence?  */
            if (env->iflags & D_FLAG) {
                env->sregs[SR_ESR] |= 1 << 12 ;
                env->sregs[SR_BTR] = env->btarget;
            }

            /* Disable the MMU.  */
            t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
            env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
            env->sregs[SR_MSR] |= t;
            /* Exception in progress.  */
            env->sregs[SR_MSR] |= MSR_EIP;

            qemu_log_mask(CPU_LOG_INT,
                          "hw exception at pc=%x ear=%x esr=%x iflags=%x\n",
                          env->sregs[SR_PC], env->sregs[SR_EAR],
                          env->sregs[SR_ESR], env->iflags);
            log_cpu_state_mask(CPU_LOG_INT, cs, 0);
            env->iflags &= ~(IMM_FLAG | D_FLAG);
            env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x20;
            break;

        case EXCP_MMU:
            env->regs[17] = env->sregs[SR_PC];

            env->sregs[SR_ESR] &= ~(1 << 12);
            /* Exception breaks branch + dslot sequence?  */
            if (env->iflags & D_FLAG) {
                D(qemu_log("D_FLAG set at exception bimm=%d\n", env->bimm));
                env->sregs[SR_ESR] |= 1 << 12 ;
                env->sregs[SR_BTR] = env->btarget;

                /* Reexecute the branch.  */
                env->regs[17] -= 4;
                /* was the branch immprefixed?.  */
                if (env->bimm) {
                    qemu_log_mask(CPU_LOG_INT,
                                  "bimm exception at pc=%x iflags=%x\n",
                                  env->sregs[SR_PC], env->iflags);
                    env->regs[17] -= 4;
                    log_cpu_state_mask(CPU_LOG_INT, cs, 0);
                }
            } else if (env->iflags & IMM_FLAG) {
                D(qemu_log("IMM_FLAG set at exception\n"));
                env->regs[17] -= 4;
            }

            /* Disable the MMU.  */
            t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
            env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
            env->sregs[SR_MSR] |= t;
            /* Exception in progress.  */
            env->sregs[SR_MSR] |= MSR_EIP;

            qemu_log_mask(CPU_LOG_INT,
                          "exception at pc=%x ear=%x iflags=%x\n",
                          env->sregs[SR_PC], env->sregs[SR_EAR], env->iflags);
            log_cpu_state_mask(CPU_LOG_INT, cs, 0);
            env->iflags &= ~(IMM_FLAG | D_FLAG);
            env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x20;
            break;

        case EXCP_IRQ:
            assert(!(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP)));
            assert(env->sregs[SR_MSR] & MSR_IE);
            assert(!(env->iflags & D_FLAG));

            t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;

#if 0
#include "disas/disas.h"

/* Useful instrumentation when debugging interrupt issues in either
   the models or in sw.  */
            {
                const char *sym;

                sym = lookup_symbol(env->sregs[SR_PC]);
                if (sym
                    && (!strcmp("netif_rx", sym)
                        || !strcmp("process_backlog", sym))) {

                    qemu_log(
                         "interrupt at pc=%x msr=%x %x iflags=%x sym=%s\n",
                         env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags,
                         sym);

                    log_cpu_state(cs, 0);
                }
            }
#endif
            qemu_log_mask(CPU_LOG_INT,
                         "interrupt at pc=%x msr=%x %x iflags=%x\n",
                         env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags);

            env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM \
                                    | MSR_UM | MSR_IE);
            env->sregs[SR_MSR] |= t;

            env->regs[14] = env->sregs[SR_PC];
            env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x10;
            //log_cpu_state_mask(CPU_LOG_INT, cs, 0);
            break;

        case EXCP_BREAK:
        case EXCP_HW_BREAK:
            assert(!(env->iflags & IMM_FLAG));
            assert(!(env->iflags & D_FLAG));
            t = (env->sregs[SR_MSR] & (MSR_VM | MSR_UM)) << 1;
            qemu_log_mask(CPU_LOG_INT,
                        "break at pc=%x msr=%x %x iflags=%x\n",
                        env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags);
            log_cpu_state_mask(CPU_LOG_INT, cs, 0);
            env->sregs[SR_MSR] &= ~(MSR_VMS | MSR_UMS | MSR_VM | MSR_UM);
            env->sregs[SR_MSR] |= t;
            env->sregs[SR_MSR] |= MSR_BIP;
            if (cs->exception_index == EXCP_HW_BREAK) {
                env->regs[16] = env->sregs[SR_PC];
                env->sregs[SR_MSR] |= MSR_BIP;
                env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x18;
            } else
                env->sregs[SR_PC] = env->btarget;
            break;
        default:
            cpu_abort(cs, "unhandled exception type=%d\n",
                      cs->exception_index);
            break;
    }
}

hwaddr mb_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
{
    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
    CPUMBState *env = &cpu->env;
    target_ulong vaddr, paddr = 0;
    struct microblaze_mmu_lookup lu;
    unsigned int hit;

    if (env->sregs[SR_MSR] & MSR_VM) {
        hit = mmu_translate(&env->mmu, &lu, addr, 0, 0);
        if (hit) {
            vaddr = addr & TARGET_PAGE_MASK;
            paddr = lu.paddr + vaddr - lu.vaddr;
        } else
            paddr = 0; /* ???.  */
    } else
        paddr = addr & TARGET_PAGE_MASK;

    return paddr;
}
#endif

bool mb_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
{
    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
    CPUMBState *env = &cpu->env;

    if ((interrupt_request & CPU_INTERRUPT_HARD)
        && (env->sregs[SR_MSR] & MSR_IE)
        && !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP))
        && !(env->iflags & (D_FLAG | IMM_FLAG))) {
        cs->exception_index = EXCP_IRQ;
        mb_cpu_do_interrupt(cs);
        return true;
    }
    return false;
}
Commit	Line	Data
4acb54ba EI	1	/*
	2	* MicroBlaze helper routines.
	3	*
	4	* Copyright (c) 2009 Edgar E. Iglesias <[email protected]>
dadc1064	5	* Copyright (c) 2009-2012 PetaLogix Qld Pty Ltd.
4acb54ba EI	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
8167ee88	18	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
4acb54ba EI	19	*/
4acb54ba EI	20
8fd9dece	21	#include "qemu/osdep.h"
4acb54ba	22	#include "cpu.h"
63c91552	23	#include "exec/exec-all.h"
1de7afc9	24	#include "qemu/host-utils.h"
508127e2	25	#include "exec/log.h"
4acb54ba EI	26
4acb54ba EI	27	#define D(x)
4acb54ba EI	28
	29	#if defined(CONFIG_USER_ONLY)
	30
97a8ea5a	31	void mb_cpu_do_interrupt(CPUState *cs)
4acb54ba	32	{
97a8ea5a AF	33	MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
	34	CPUMBState *env = &cpu->env;
	35
27103424	36	cs->exception_index = -1;
8cc9b43f	37	env->res_addr = RES_ADDR_NONE;
4acb54ba EI	38	env->regs[14] = env->sregs[SR_PC];
	39	}
	40
7510454e	41	int mb_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
97b348e7	42	int mmu_idx)
4acb54ba	43	{
27103424	44	cs->exception_index = 0xaa;
7510454e	45	cpu_dump_state(cs, stderr, fprintf, 0);
4acb54ba EI	46	return 1;
	47	}
	48
4acb54ba EI	49	#else /* !CONFIG_USER_ONLY */
4acb54ba EI	50
7510454e AF	51	int mb_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
7510454e AF	52	int mmu_idx)
4acb54ba	53	{
7510454e AF	54	MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
7510454e AF	55	CPUMBState *env = &cpu->env;
4acb54ba EI	56	unsigned int hit;
	57	unsigned int mmu_available;
	58	int r = 1;
	59	int prot;
	60
	61	mmu_available = 0;
71446123	62	if (cpu->cfg.use_mmu) {
4acb54ba	63	mmu_available = 1;
6fad9e98 AF	64	if ((cpu->cfg.pvr == C_PVR_FULL) &&
6fad9e98 AF	65	(env->pvr.regs[11] & PVR11_USE_MMU) != PVR11_USE_MMU) {
4acb54ba EI	66	mmu_available = 0;
	67	}
	68	}
	69
	70	/* Translate if the MMU is available and enabled. */
	71	if (mmu_available && (env->sregs[SR_MSR] & MSR_VM)) {
	72	target_ulong vaddr, paddr;
	73	struct microblaze_mmu_lookup lu;
	74
	75	hit = mmu_translate(&env->mmu, &lu, address, rw, mmu_idx);
	76	if (hit) {
	77	vaddr = address & TARGET_PAGE_MASK;
	78	paddr = lu.paddr + vaddr - lu.vaddr;
	79
339aaf5b AP	80	qemu_log_mask(CPU_LOG_MMU, "MMU map mmu=%d v=%x p=%x prot=%x\n",
339aaf5b AP	81	mmu_idx, vaddr, paddr, lu.prot);
0c591eb0	82	tlb_set_page(cs, vaddr, paddr, lu.prot, mmu_idx, TARGET_PAGE_SIZE);
d4c430a8	83	r = 0;
4acb54ba EI	84	} else {
4acb54ba EI	85	env->sregs[SR_EAR] = address;
339aaf5b AP	86	qemu_log_mask(CPU_LOG_MMU, "mmu=%d miss v=%" VADDR_PRIx "\n",
339aaf5b AP	87	mmu_idx, address);
4acb54ba EI	88
	89	switch (lu.err) {
	90	case ERR_PROT:
	91	env->sregs[SR_ESR] = rw == 2 ? 17 : 16;
	92	env->sregs[SR_ESR] \|= (rw == 1) << 10;
	93	break;
	94	case ERR_MISS:
	95	env->sregs[SR_ESR] = rw == 2 ? 19 : 18;
	96	env->sregs[SR_ESR] \|= (rw == 1) << 10;
	97	break;
	98	default:
	99	abort();
	100	break;
	101	}
	102
27103424	103	if (cs->exception_index == EXCP_MMU) {
a47dddd7	104	cpu_abort(cs, "recursive faults\n");
4acb54ba EI	105	}
	106
	107	/* TLB miss. */
27103424	108	cs->exception_index = EXCP_MMU;
4acb54ba EI	109	}
	110	} else {
	111	/* MMU disabled or not available. */
	112	address &= TARGET_PAGE_MASK;
	113	prot = PAGE_BITS;
0c591eb0	114	tlb_set_page(cs, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
d4c430a8	115	r = 0;
4acb54ba EI	116	}
	117	return r;
	118	}
	119
97a8ea5a	120	void mb_cpu_do_interrupt(CPUState *cs)
4acb54ba	121	{
97a8ea5a AF	122	MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
97a8ea5a AF	123	CPUMBState *env = &cpu->env;
4acb54ba EI	124	uint32_t t;
4acb54ba EI	125
5225d669	126	/* IMM flag cannot propagate across a branch and into the dslot. */
4acb54ba EI	127	assert(!((env->iflags & D_FLAG) && (env->iflags & IMM_FLAG)));
	128	assert(!(env->iflags & (DRTI_FLAG \| DRTE_FLAG \| DRTB_FLAG)));
	129	/* assert(env->sregs[SR_MSR] & (MSR_EE)); Only for HW exceptions. */
8cc9b43f	130	env->res_addr = RES_ADDR_NONE;
27103424	131	switch (cs->exception_index) {
cedb936b EI	132	case EXCP_HW_EXCP:
cedb936b EI	133	if (!(env->pvr.regs[0] & PVR0_USE_EXC_MASK)) {
1d512a65	134	qemu_log_mask(LOG_GUEST_ERROR, "Exception raised on system without exceptions!\n");
cedb936b EI	135	return;
	136	}
	137
	138	env->regs[17] = env->sregs[SR_PC] + 4;
	139	env->sregs[SR_ESR] &= ~(1 << 12);
	140
	141	/* Exception breaks branch + dslot sequence? */
	142	if (env->iflags & D_FLAG) {
	143	env->sregs[SR_ESR] \|= 1 << 12 ;
	144	env->sregs[SR_BTR] = env->btarget;
	145	}
	146
	147	/* Disable the MMU. */
	148	t = (env->sregs[SR_MSR] & (MSR_VM \| MSR_UM)) << 1;
	149	env->sregs[SR_MSR] &= ~(MSR_VMS \| MSR_UMS \| MSR_VM \| MSR_UM);
	150	env->sregs[SR_MSR] \|= t;
	151	/* Exception in progress. */
	152	env->sregs[SR_MSR] \|= MSR_EIP;
	153
	154	qemu_log_mask(CPU_LOG_INT,
	155	"hw exception at pc=%x ear=%x esr=%x iflags=%x\n",
	156	env->sregs[SR_PC], env->sregs[SR_EAR],
	157	env->sregs[SR_ESR], env->iflags);
a0762859	158	log_cpu_state_mask(CPU_LOG_INT, cs, 0);
cedb936b	159	env->iflags &= ~(IMM_FLAG \| D_FLAG);
f27183ab	160	env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x20;
cedb936b EI	161	break;
cedb936b EI	162
4acb54ba EI	163	case EXCP_MMU:
	164	env->regs[17] = env->sregs[SR_PC];
	165
a75cf0c5	166	env->sregs[SR_ESR] &= ~(1 << 12);
4acb54ba EI	167	/* Exception breaks branch + dslot sequence? */
	168	if (env->iflags & D_FLAG) {
	169	D(qemu_log("D_FLAG set at exception bimm=%d\n", env->bimm));
	170	env->sregs[SR_ESR] \|= 1 << 12 ;
	171	env->sregs[SR_BTR] = env->btarget;
	172
	173	/* Reexecute the branch. */
	174	env->regs[17] -= 4;
	175	/* was the branch immprefixed?. */
	176	if (env->bimm) {
	177	qemu_log_mask(CPU_LOG_INT,
	178	"bimm exception at pc=%x iflags=%x\n",
	179	env->sregs[SR_PC], env->iflags);
	180	env->regs[17] -= 4;
a0762859	181	log_cpu_state_mask(CPU_LOG_INT, cs, 0);
4acb54ba EI	182	}
	183	} else if (env->iflags & IMM_FLAG) {
	184	D(qemu_log("IMM_FLAG set at exception\n"));
	185	env->regs[17] -= 4;
	186	}
	187
	188	/* Disable the MMU. */
	189	t = (env->sregs[SR_MSR] & (MSR_VM \| MSR_UM)) << 1;
	190	env->sregs[SR_MSR] &= ~(MSR_VMS \| MSR_UMS \| MSR_VM \| MSR_UM);
	191	env->sregs[SR_MSR] \|= t;
	192	/* Exception in progress. */
	193	env->sregs[SR_MSR] \|= MSR_EIP;
	194
	195	qemu_log_mask(CPU_LOG_INT,
	196	"exception at pc=%x ear=%x iflags=%x\n",
	197	env->sregs[SR_PC], env->sregs[SR_EAR], env->iflags);
a0762859	198	log_cpu_state_mask(CPU_LOG_INT, cs, 0);
4acb54ba	199	env->iflags &= ~(IMM_FLAG \| D_FLAG);
f27183ab	200	env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x20;
4acb54ba EI	201	break;
	202
	203	case EXCP_IRQ:
	204	assert(!(env->sregs[SR_MSR] & (MSR_EIP \| MSR_BIP)));
	205	assert(env->sregs[SR_MSR] & MSR_IE);
	206	assert(!(env->iflags & D_FLAG));
	207
	208	t = (env->sregs[SR_MSR] & (MSR_VM \| MSR_UM)) << 1;
	209
	210	#if 0
76cad711	211	#include "disas/disas.h"
4acb54ba EI	212
	213	/* Useful instrumentation when debugging interrupt issues in either
	214	the models or in sw. */
	215	{
	216	const char *sym;
	217
	218	sym = lookup_symbol(env->sregs[SR_PC]);
	219	if (sym
	220	&& (!strcmp("netif_rx", sym)
	221	\|\| !strcmp("process_backlog", sym))) {
	222
	223	qemu_log(
	224	"interrupt at pc=%x msr=%x %x iflags=%x sym=%s\n",
	225	env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags,
	226	sym);
	227
a0762859	228	log_cpu_state(cs, 0);
4acb54ba EI	229	}
	230	}
	231	#endif
	232	qemu_log_mask(CPU_LOG_INT,
	233	"interrupt at pc=%x msr=%x %x iflags=%x\n",
	234	env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags);
	235
	236	env->sregs[SR_MSR] &= ~(MSR_VMS \| MSR_UMS \| MSR_VM \
	237	\| MSR_UM \| MSR_IE);
	238	env->sregs[SR_MSR] \|= t;
	239
	240	env->regs[14] = env->sregs[SR_PC];
f27183ab	241	env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x10;
a0762859	242	//log_cpu_state_mask(CPU_LOG_INT, cs, 0);
4acb54ba EI	243	break;
	244
	245	case EXCP_BREAK:
	246	case EXCP_HW_BREAK:
	247	assert(!(env->iflags & IMM_FLAG));
	248	assert(!(env->iflags & D_FLAG));
	249	t = (env->sregs[SR_MSR] & (MSR_VM \| MSR_UM)) << 1;
	250	qemu_log_mask(CPU_LOG_INT,
	251	"break at pc=%x msr=%x %x iflags=%x\n",
	252	env->sregs[SR_PC], env->sregs[SR_MSR], t, env->iflags);
a0762859	253	log_cpu_state_mask(CPU_LOG_INT, cs, 0);
4acb54ba EI	254	env->sregs[SR_MSR] &= ~(MSR_VMS \| MSR_UMS \| MSR_VM \| MSR_UM);
	255	env->sregs[SR_MSR] \|= t;
	256	env->sregs[SR_MSR] \|= MSR_BIP;
27103424	257	if (cs->exception_index == EXCP_HW_BREAK) {
4acb54ba EI	258	env->regs[16] = env->sregs[SR_PC];
4acb54ba EI	259	env->sregs[SR_MSR] \|= MSR_BIP;
f27183ab	260	env->sregs[SR_PC] = cpu->cfg.base_vectors + 0x18;
4acb54ba EI	261	} else
	262	env->sregs[SR_PC] = env->btarget;
	263	break;
	264	default:
a47dddd7	265	cpu_abort(cs, "unhandled exception type=%d\n",
27103424	266	cs->exception_index);
4acb54ba EI	267	break;
	268	}
	269	}
	270
00b941e5	271	hwaddr mb_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
4acb54ba	272	{
00b941e5 AF	273	MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
00b941e5 AF	274	CPUMBState *env = &cpu->env;
4acb54ba EI	275	target_ulong vaddr, paddr = 0;
	276	struct microblaze_mmu_lookup lu;
	277	unsigned int hit;
	278
	279	if (env->sregs[SR_MSR] & MSR_VM) {
	280	hit = mmu_translate(&env->mmu, &lu, addr, 0, 0);
	281	if (hit) {
	282	vaddr = addr & TARGET_PAGE_MASK;
	283	paddr = lu.paddr + vaddr - lu.vaddr;
	284	} else
	285	paddr = 0; /* ???. */
	286	} else
	287	paddr = addr & TARGET_PAGE_MASK;
	288
	289	return paddr;
	290	}
	291	#endif
29cd33d3 RH	292
	293	bool mb_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
	294	{
	295	MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
	296	CPUMBState *env = &cpu->env;
	297
	298	if ((interrupt_request & CPU_INTERRUPT_HARD)
	299	&& (env->sregs[SR_MSR] & MSR_IE)
	300	&& !(env->sregs[SR_MSR] & (MSR_EIP \| MSR_BIP))
	301	&& !(env->iflags & (D_FLAG \| IMM_FLAG))) {
	302	cs->exception_index = EXCP_IRQ;
	303	mb_cpu_do_interrupt(cs);
	304	return true;
	305	}
	306	return false;
	307	}