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/*
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* APIC support
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*
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* Copyright (c) 2004-2005 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "hw.h" |
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#include "pc.h" |
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#include "qemu-timer.h" |
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//#define DEBUG_APIC
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//#define DEBUG_IOAPIC
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/* APIC Local Vector Table */
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#define APIC_LVT_TIMER 0 |
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#define APIC_LVT_THERMAL 1 |
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#define APIC_LVT_PERFORM 2 |
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#define APIC_LVT_LINT0 3 |
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#define APIC_LVT_LINT1 4 |
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#define APIC_LVT_ERROR 5 |
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#define APIC_LVT_NB 6 |
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/* APIC delivery modes */
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#define APIC_DM_FIXED 0 |
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#define APIC_DM_LOWPRI 1 |
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#define APIC_DM_SMI 2 |
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#define APIC_DM_NMI 4 |
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#define APIC_DM_INIT 5 |
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#define APIC_DM_SIPI 6 |
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#define APIC_DM_EXTINT 7 |
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/* APIC destination mode */
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#define APIC_DESTMODE_FLAT 0xf |
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#define APIC_DESTMODE_CLUSTER 1 |
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#define APIC_TRIGGER_EDGE 0 |
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#define APIC_TRIGGER_LEVEL 1 |
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#define APIC_LVT_TIMER_PERIODIC (1<<17) |
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#define APIC_LVT_MASKED (1<<16) |
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#define APIC_LVT_LEVEL_TRIGGER (1<<15) |
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#define APIC_LVT_REMOTE_IRR (1<<14) |
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#define APIC_INPUT_POLARITY (1<<13) |
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#define APIC_SEND_PENDING (1<<12) |
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#define IOAPIC_NUM_PINS 0x18 |
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#define ESR_ILLEGAL_ADDRESS (1 << 7) |
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#define APIC_SV_ENABLE (1 << 8) |
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#define MAX_APICS 255 |
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#define MAX_APIC_WORDS 8 |
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typedef struct APICState { |
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CPUState *cpu_env; |
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uint32_t apicbase; |
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uint8_t id; |
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uint8_t arb_id; |
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uint8_t tpr; |
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uint32_t spurious_vec; |
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uint8_t log_dest; |
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uint8_t dest_mode; |
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uint32_t isr[8]; /* in service register */ |
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uint32_t tmr[8]; /* trigger mode register */ |
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uint32_t irr[8]; /* interrupt request register */ |
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uint32_t lvt[APIC_LVT_NB]; |
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uint32_t esr; /* error register */
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uint32_t icr[2];
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uint32_t divide_conf; |
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int count_shift;
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uint32_t initial_count; |
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int64_t initial_count_load_time, next_time; |
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QEMUTimer *timer; |
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} APICState; |
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struct IOAPICState {
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uint8_t id; |
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uint8_t ioregsel; |
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uint32_t irr; |
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uint64_t ioredtbl[IOAPIC_NUM_PINS]; |
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}; |
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static int apic_io_memory; |
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static APICState *local_apics[MAX_APICS + 1]; |
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static int last_apic_id = 0; |
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static void apic_init_ipi(APICState *s); |
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static void apic_set_irq(APICState *s, int vector_num, int trigger_mode); |
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static void apic_update_irq(APICState *s); |
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/* Find first bit starting from msb. Return 0 if value = 0 */
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static int fls_bit(uint32_t value) |
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{ |
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unsigned int ret = 0; |
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#if defined(HOST_I386)
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__asm__ __volatile__ ("bsr %1, %0\n" : "+r" (ret) : "rm" (value)); |
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return ret;
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#else
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if (value > 0xffff) |
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value >>= 16, ret = 16; |
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if (value > 0xff) |
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value >>= 8, ret += 8; |
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if (value > 0xf) |
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value >>= 4, ret += 4; |
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if (value > 0x3) |
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value >>= 2, ret += 2; |
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return ret + (value >> 1); |
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#endif
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} |
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/* Find first bit starting from lsb. Return 0 if value = 0 */
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static int ffs_bit(uint32_t value) |
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{ |
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unsigned int ret = 0; |
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#if defined(HOST_I386)
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__asm__ __volatile__ ("bsf %1, %0\n" : "+r" (ret) : "rm" (value)); |
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return ret;
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#else
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if (!value)
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return 0; |
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if (!(value & 0xffff)) |
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value >>= 16, ret = 16; |
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if (!(value & 0xff)) |
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value >>= 8, ret += 8; |
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if (!(value & 0xf)) |
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value >>= 4, ret += 4; |
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if (!(value & 0x3)) |
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value >>= 2, ret += 2; |
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if (!(value & 0x1)) |
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ret++; |
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return ret;
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#endif
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} |
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static inline void set_bit(uint32_t *tab, int index) |
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{ |
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int i, mask;
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i = index >> 5;
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mask = 1 << (index & 0x1f); |
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tab[i] |= mask; |
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} |
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static inline void reset_bit(uint32_t *tab, int index) |
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{ |
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int i, mask;
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i = index >> 5;
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mask = 1 << (index & 0x1f); |
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tab[i] &= ~mask; |
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} |
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static void apic_local_deliver(CPUState *env, int vector) |
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{ |
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APICState *s = env->apic_state; |
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uint32_t lvt = s->lvt[vector]; |
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int trigger_mode;
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if (lvt & APIC_LVT_MASKED)
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return;
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switch ((lvt >> 8) & 7) { |
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case APIC_DM_SMI:
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cpu_interrupt(env, CPU_INTERRUPT_SMI); |
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break;
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case APIC_DM_NMI:
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cpu_interrupt(env, CPU_INTERRUPT_NMI); |
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break;
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case APIC_DM_EXTINT:
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cpu_interrupt(env, CPU_INTERRUPT_HARD); |
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break;
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case APIC_DM_FIXED:
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trigger_mode = APIC_TRIGGER_EDGE; |
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if ((vector == APIC_LVT_LINT0 || vector == APIC_LVT_LINT1) &&
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(lvt & APIC_LVT_LEVEL_TRIGGER)) |
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trigger_mode = APIC_TRIGGER_LEVEL; |
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apic_set_irq(s, lvt & 0xff, trigger_mode);
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} |
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} |
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void apic_deliver_pic_intr(CPUState *env, int level) |
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{ |
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if (level)
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apic_local_deliver(env, APIC_LVT_LINT0); |
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else {
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APICState *s = env->apic_state; |
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uint32_t lvt = s->lvt[APIC_LVT_LINT0]; |
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switch ((lvt >> 8) & 7) { |
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case APIC_DM_FIXED:
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if (!(lvt & APIC_LVT_LEVEL_TRIGGER))
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break;
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reset_bit(s->irr, lvt & 0xff);
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/* fall through */
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case APIC_DM_EXTINT:
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cpu_reset_interrupt(env, CPU_INTERRUPT_HARD); |
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break;
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} |
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} |
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} |
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#define foreach_apic(apic, deliver_bitmask, code) \
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{\ |
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int __i, __j, __mask;\
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for(__i = 0; __i < MAX_APIC_WORDS; __i++) {\ |
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__mask = deliver_bitmask[__i];\ |
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if (__mask) {\
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for(__j = 0; __j < 32; __j++) {\ |
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if (__mask & (1 << __j)) {\ |
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apic = local_apics[__i * 32 + __j];\
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if (apic) {\
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code;\ |
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}\ |
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}\ |
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}\ |
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}\ |
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}\ |
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} |
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static void apic_bus_deliver(const uint32_t *deliver_bitmask, |
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uint8_t delivery_mode, |
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uint8_t vector_num, uint8_t polarity, |
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uint8_t trigger_mode) |
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{ |
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APICState *apic_iter; |
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switch (delivery_mode) {
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case APIC_DM_LOWPRI:
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/* XXX: search for focus processor, arbitration */
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{ |
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int i, d;
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d = -1;
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for(i = 0; i < MAX_APIC_WORDS; i++) { |
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if (deliver_bitmask[i]) {
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d = i * 32 + ffs_bit(deliver_bitmask[i]);
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break;
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} |
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} |
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if (d >= 0) { |
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apic_iter = local_apics[d]; |
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if (apic_iter) {
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apic_set_irq(apic_iter, vector_num, trigger_mode); |
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} |
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} |
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} |
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return;
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case APIC_DM_FIXED:
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break;
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case APIC_DM_SMI:
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foreach_apic(apic_iter, deliver_bitmask, |
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cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_SMI) ); |
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return;
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case APIC_DM_NMI:
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foreach_apic(apic_iter, deliver_bitmask, |
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cpu_interrupt(apic_iter->cpu_env, CPU_INTERRUPT_NMI) ); |
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return;
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case APIC_DM_INIT:
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/* normal INIT IPI sent to processors */
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foreach_apic(apic_iter, deliver_bitmask, |
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apic_init_ipi(apic_iter) ); |
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return;
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case APIC_DM_EXTINT:
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/* handled in I/O APIC code */
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break;
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default:
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return;
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} |
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foreach_apic(apic_iter, deliver_bitmask, |
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apic_set_irq(apic_iter, vector_num, trigger_mode) ); |
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} |
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void cpu_set_apic_base(CPUState *env, uint64_t val)
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{ |
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APICState *s = env->apic_state; |
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#ifdef DEBUG_APIC
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printf("cpu_set_apic_base: %016" PRIx64 "\n", val); |
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#endif
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s->apicbase = (val & 0xfffff000) |
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(s->apicbase & (MSR_IA32_APICBASE_BSP | MSR_IA32_APICBASE_ENABLE)); |
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/* if disabled, cannot be enabled again */
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if (!(val & MSR_IA32_APICBASE_ENABLE)) {
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s->apicbase &= ~MSR_IA32_APICBASE_ENABLE; |
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env->cpuid_features &= ~CPUID_APIC; |
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s->spurious_vec &= ~APIC_SV_ENABLE; |
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} |
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} |
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uint64_t cpu_get_apic_base(CPUState *env) |
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{ |
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APICState *s = env->apic_state; |
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#ifdef DEBUG_APIC
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printf("cpu_get_apic_base: %016" PRIx64 "\n", (uint64_t)s->apicbase); |
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#endif
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return s->apicbase;
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} |
322 |
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void cpu_set_apic_tpr(CPUX86State *env, uint8_t val)
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{ |
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APICState *s = env->apic_state; |
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s->tpr = (val & 0x0f) << 4; |
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apic_update_irq(s); |
328 |
} |
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uint8_t cpu_get_apic_tpr(CPUX86State *env) |
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{ |
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APICState *s = env->apic_state; |
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return s->tpr >> 4; |
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} |
335 |
|
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/* return -1 if no bit is set */
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static int get_highest_priority_int(uint32_t *tab) |
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{ |
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int i;
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for(i = 7; i >= 0; i--) { |
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if (tab[i] != 0) { |
342 |
return i * 32 + fls_bit(tab[i]); |
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} |
344 |
} |
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return -1; |
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} |
347 |
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static int apic_get_ppr(APICState *s) |
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{ |
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int tpr, isrv, ppr;
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tpr = (s->tpr >> 4);
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isrv = get_highest_priority_int(s->isr); |
354 |
if (isrv < 0) |
355 |
isrv = 0;
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isrv >>= 4;
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if (tpr >= isrv)
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ppr = s->tpr; |
359 |
else
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360 |
ppr = isrv << 4;
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return ppr;
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} |
363 |
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static int apic_get_arb_pri(APICState *s) |
365 |
{ |
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/* XXX: arbitration */
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return 0; |
368 |
} |
369 |
|
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/* signal the CPU if an irq is pending */
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static void apic_update_irq(APICState *s) |
372 |
{ |
373 |
int irrv, ppr;
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if (!(s->spurious_vec & APIC_SV_ENABLE))
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return;
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376 |
irrv = get_highest_priority_int(s->irr); |
377 |
if (irrv < 0) |
378 |
return;
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379 |
ppr = apic_get_ppr(s); |
380 |
if (ppr && (irrv & 0xf0) <= (ppr & 0xf0)) |
381 |
return;
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382 |
cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD); |
383 |
} |
384 |
|
385 |
static void apic_set_irq(APICState *s, int vector_num, int trigger_mode) |
386 |
{ |
387 |
set_bit(s->irr, vector_num); |
388 |
if (trigger_mode)
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set_bit(s->tmr, vector_num); |
390 |
else
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reset_bit(s->tmr, vector_num); |
392 |
apic_update_irq(s); |
393 |
} |
394 |
|
395 |
static void apic_eoi(APICState *s) |
396 |
{ |
397 |
int isrv;
|
398 |
isrv = get_highest_priority_int(s->isr); |
399 |
if (isrv < 0) |
400 |
return;
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401 |
reset_bit(s->isr, isrv); |
402 |
/* XXX: send the EOI packet to the APIC bus to allow the I/O APIC to
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403 |
set the remote IRR bit for level triggered interrupts. */
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apic_update_irq(s); |
405 |
} |
406 |
|
407 |
static void apic_get_delivery_bitmask(uint32_t *deliver_bitmask, |
408 |
uint8_t dest, uint8_t dest_mode) |
409 |
{ |
410 |
APICState *apic_iter; |
411 |
int i;
|
412 |
|
413 |
if (dest_mode == 0) { |
414 |
if (dest == 0xff) { |
415 |
memset(deliver_bitmask, 0xff, MAX_APIC_WORDS * sizeof(uint32_t)); |
416 |
} else {
|
417 |
memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t)); |
418 |
set_bit(deliver_bitmask, dest); |
419 |
} |
420 |
} else {
|
421 |
/* XXX: cluster mode */
|
422 |
memset(deliver_bitmask, 0x00, MAX_APIC_WORDS * sizeof(uint32_t)); |
423 |
for(i = 0; i < MAX_APICS; i++) { |
424 |
apic_iter = local_apics[i]; |
425 |
if (apic_iter) {
|
426 |
if (apic_iter->dest_mode == 0xf) { |
427 |
if (dest & apic_iter->log_dest)
|
428 |
set_bit(deliver_bitmask, i); |
429 |
} else if (apic_iter->dest_mode == 0x0) { |
430 |
if ((dest & 0xf0) == (apic_iter->log_dest & 0xf0) && |
431 |
(dest & apic_iter->log_dest & 0x0f)) {
|
432 |
set_bit(deliver_bitmask, i); |
433 |
} |
434 |
} |
435 |
} |
436 |
} |
437 |
} |
438 |
} |
439 |
|
440 |
|
441 |
static void apic_init_ipi(APICState *s) |
442 |
{ |
443 |
int i;
|
444 |
|
445 |
s->tpr = 0;
|
446 |
s->spurious_vec = 0xff;
|
447 |
s->log_dest = 0;
|
448 |
s->dest_mode = 0xf;
|
449 |
memset(s->isr, 0, sizeof(s->isr)); |
450 |
memset(s->tmr, 0, sizeof(s->tmr)); |
451 |
memset(s->irr, 0, sizeof(s->irr)); |
452 |
for(i = 0; i < APIC_LVT_NB; i++) |
453 |
s->lvt[i] = 1 << 16; /* mask LVT */ |
454 |
s->esr = 0;
|
455 |
memset(s->icr, 0, sizeof(s->icr)); |
456 |
s->divide_conf = 0;
|
457 |
s->count_shift = 0;
|
458 |
s->initial_count = 0;
|
459 |
s->initial_count_load_time = 0;
|
460 |
s->next_time = 0;
|
461 |
} |
462 |
|
463 |
/* send a SIPI message to the CPU to start it */
|
464 |
static void apic_startup(APICState *s, int vector_num) |
465 |
{ |
466 |
CPUState *env = s->cpu_env; |
467 |
if (!env->halted)
|
468 |
return;
|
469 |
env->eip = 0;
|
470 |
cpu_x86_load_seg_cache(env, R_CS, vector_num << 8, vector_num << 12, |
471 |
0xffff, 0); |
472 |
env->halted = 0;
|
473 |
} |
474 |
|
475 |
static void apic_deliver(APICState *s, uint8_t dest, uint8_t dest_mode, |
476 |
uint8_t delivery_mode, uint8_t vector_num, |
477 |
uint8_t polarity, uint8_t trigger_mode) |
478 |
{ |
479 |
uint32_t deliver_bitmask[MAX_APIC_WORDS]; |
480 |
int dest_shorthand = (s->icr[0] >> 18) & 3; |
481 |
APICState *apic_iter; |
482 |
|
483 |
switch (dest_shorthand) {
|
484 |
case 0: |
485 |
apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode); |
486 |
break;
|
487 |
case 1: |
488 |
memset(deliver_bitmask, 0x00, sizeof(deliver_bitmask)); |
489 |
set_bit(deliver_bitmask, s->id); |
490 |
break;
|
491 |
case 2: |
492 |
memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask)); |
493 |
break;
|
494 |
case 3: |
495 |
memset(deliver_bitmask, 0xff, sizeof(deliver_bitmask)); |
496 |
reset_bit(deliver_bitmask, s->id); |
497 |
break;
|
498 |
} |
499 |
|
500 |
switch (delivery_mode) {
|
501 |
case APIC_DM_INIT:
|
502 |
{ |
503 |
int trig_mode = (s->icr[0] >> 15) & 1; |
504 |
int level = (s->icr[0] >> 14) & 1; |
505 |
if (level == 0 && trig_mode == 1) { |
506 |
foreach_apic(apic_iter, deliver_bitmask, |
507 |
apic_iter->arb_id = apic_iter->id ); |
508 |
return;
|
509 |
} |
510 |
} |
511 |
break;
|
512 |
|
513 |
case APIC_DM_SIPI:
|
514 |
foreach_apic(apic_iter, deliver_bitmask, |
515 |
apic_startup(apic_iter, vector_num) ); |
516 |
return;
|
517 |
} |
518 |
|
519 |
apic_bus_deliver(deliver_bitmask, delivery_mode, vector_num, polarity, |
520 |
trigger_mode); |
521 |
} |
522 |
|
523 |
int apic_get_interrupt(CPUState *env)
|
524 |
{ |
525 |
APICState *s = env->apic_state; |
526 |
int intno;
|
527 |
|
528 |
/* if the APIC is installed or enabled, we let the 8259 handle the
|
529 |
IRQs */
|
530 |
if (!s)
|
531 |
return -1; |
532 |
if (!(s->spurious_vec & APIC_SV_ENABLE))
|
533 |
return -1; |
534 |
|
535 |
/* XXX: spurious IRQ handling */
|
536 |
intno = get_highest_priority_int(s->irr); |
537 |
if (intno < 0) |
538 |
return -1; |
539 |
if (s->tpr && intno <= s->tpr)
|
540 |
return s->spurious_vec & 0xff; |
541 |
reset_bit(s->irr, intno); |
542 |
set_bit(s->isr, intno); |
543 |
apic_update_irq(s); |
544 |
return intno;
|
545 |
} |
546 |
|
547 |
int apic_accept_pic_intr(CPUState *env)
|
548 |
{ |
549 |
APICState *s = env->apic_state; |
550 |
uint32_t lvt0; |
551 |
|
552 |
if (!s)
|
553 |
return -1; |
554 |
|
555 |
lvt0 = s->lvt[APIC_LVT_LINT0]; |
556 |
|
557 |
if ((s->apicbase & MSR_IA32_APICBASE_ENABLE) == 0 || |
558 |
(lvt0 & APIC_LVT_MASKED) == 0)
|
559 |
return 1; |
560 |
|
561 |
return 0; |
562 |
} |
563 |
|
564 |
static uint32_t apic_get_current_count(APICState *s)
|
565 |
{ |
566 |
int64_t d; |
567 |
uint32_t val; |
568 |
d = (qemu_get_clock(vm_clock) - s->initial_count_load_time) >> |
569 |
s->count_shift; |
570 |
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
|
571 |
/* periodic */
|
572 |
val = s->initial_count - (d % ((uint64_t)s->initial_count + 1));
|
573 |
} else {
|
574 |
if (d >= s->initial_count)
|
575 |
val = 0;
|
576 |
else
|
577 |
val = s->initial_count - d; |
578 |
} |
579 |
return val;
|
580 |
} |
581 |
|
582 |
static void apic_timer_update(APICState *s, int64_t current_time) |
583 |
{ |
584 |
int64_t next_time, d; |
585 |
|
586 |
if (!(s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED)) {
|
587 |
d = (current_time - s->initial_count_load_time) >> |
588 |
s->count_shift; |
589 |
if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
|
590 |
if (!s->initial_count)
|
591 |
goto no_timer;
|
592 |
d = ((d / ((uint64_t)s->initial_count + 1)) + 1) * ((uint64_t)s->initial_count + 1); |
593 |
} else {
|
594 |
if (d >= s->initial_count)
|
595 |
goto no_timer;
|
596 |
d = (uint64_t)s->initial_count + 1;
|
597 |
} |
598 |
next_time = s->initial_count_load_time + (d << s->count_shift); |
599 |
qemu_mod_timer(s->timer, next_time); |
600 |
s->next_time = next_time; |
601 |
} else {
|
602 |
no_timer:
|
603 |
qemu_del_timer(s->timer); |
604 |
} |
605 |
} |
606 |
|
607 |
static void apic_timer(void *opaque) |
608 |
{ |
609 |
APICState *s = opaque; |
610 |
|
611 |
apic_local_deliver(s->cpu_env, APIC_LVT_TIMER); |
612 |
apic_timer_update(s, s->next_time); |
613 |
} |
614 |
|
615 |
static uint32_t apic_mem_readb(void *opaque, target_phys_addr_t addr) |
616 |
{ |
617 |
return 0; |
618 |
} |
619 |
|
620 |
static uint32_t apic_mem_readw(void *opaque, target_phys_addr_t addr) |
621 |
{ |
622 |
return 0; |
623 |
} |
624 |
|
625 |
static void apic_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t val) |
626 |
{ |
627 |
} |
628 |
|
629 |
static void apic_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val) |
630 |
{ |
631 |
} |
632 |
|
633 |
static uint32_t apic_mem_readl(void *opaque, target_phys_addr_t addr) |
634 |
{ |
635 |
CPUState *env; |
636 |
APICState *s; |
637 |
uint32_t val; |
638 |
int index;
|
639 |
|
640 |
env = cpu_single_env; |
641 |
if (!env)
|
642 |
return 0; |
643 |
s = env->apic_state; |
644 |
|
645 |
index = (addr >> 4) & 0xff; |
646 |
switch(index) {
|
647 |
case 0x02: /* id */ |
648 |
val = s->id << 24;
|
649 |
break;
|
650 |
case 0x03: /* version */ |
651 |
val = 0x11 | ((APIC_LVT_NB - 1) << 16); /* version 0x11 */ |
652 |
break;
|
653 |
case 0x08: |
654 |
val = s->tpr; |
655 |
break;
|
656 |
case 0x09: |
657 |
val = apic_get_arb_pri(s); |
658 |
break;
|
659 |
case 0x0a: |
660 |
/* ppr */
|
661 |
val = apic_get_ppr(s); |
662 |
break;
|
663 |
case 0x0b: |
664 |
val = 0;
|
665 |
break;
|
666 |
case 0x0d: |
667 |
val = s->log_dest << 24;
|
668 |
break;
|
669 |
case 0x0e: |
670 |
val = s->dest_mode << 28;
|
671 |
break;
|
672 |
case 0x0f: |
673 |
val = s->spurious_vec; |
674 |
break;
|
675 |
case 0x10 ... 0x17: |
676 |
val = s->isr[index & 7];
|
677 |
break;
|
678 |
case 0x18 ... 0x1f: |
679 |
val = s->tmr[index & 7];
|
680 |
break;
|
681 |
case 0x20 ... 0x27: |
682 |
val = s->irr[index & 7];
|
683 |
break;
|
684 |
case 0x28: |
685 |
val = s->esr; |
686 |
break;
|
687 |
case 0x30: |
688 |
case 0x31: |
689 |
val = s->icr[index & 1];
|
690 |
break;
|
691 |
case 0x32 ... 0x37: |
692 |
val = s->lvt[index - 0x32];
|
693 |
break;
|
694 |
case 0x38: |
695 |
val = s->initial_count; |
696 |
break;
|
697 |
case 0x39: |
698 |
val = apic_get_current_count(s); |
699 |
break;
|
700 |
case 0x3e: |
701 |
val = s->divide_conf; |
702 |
break;
|
703 |
default:
|
704 |
s->esr |= ESR_ILLEGAL_ADDRESS; |
705 |
val = 0;
|
706 |
break;
|
707 |
} |
708 |
#ifdef DEBUG_APIC
|
709 |
printf("APIC read: %08x = %08x\n", (uint32_t)addr, val);
|
710 |
#endif
|
711 |
return val;
|
712 |
} |
713 |
|
714 |
static void apic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
715 |
{ |
716 |
CPUState *env; |
717 |
APICState *s; |
718 |
int index;
|
719 |
|
720 |
env = cpu_single_env; |
721 |
if (!env)
|
722 |
return;
|
723 |
s = env->apic_state; |
724 |
|
725 |
#ifdef DEBUG_APIC
|
726 |
printf("APIC write: %08x = %08x\n", (uint32_t)addr, val);
|
727 |
#endif
|
728 |
|
729 |
index = (addr >> 4) & 0xff; |
730 |
switch(index) {
|
731 |
case 0x02: |
732 |
s->id = (val >> 24);
|
733 |
break;
|
734 |
case 0x03: |
735 |
break;
|
736 |
case 0x08: |
737 |
s->tpr = val; |
738 |
apic_update_irq(s); |
739 |
break;
|
740 |
case 0x09: |
741 |
case 0x0a: |
742 |
break;
|
743 |
case 0x0b: /* EOI */ |
744 |
apic_eoi(s); |
745 |
break;
|
746 |
case 0x0d: |
747 |
s->log_dest = val >> 24;
|
748 |
break;
|
749 |
case 0x0e: |
750 |
s->dest_mode = val >> 28;
|
751 |
break;
|
752 |
case 0x0f: |
753 |
s->spurious_vec = val & 0x1ff;
|
754 |
apic_update_irq(s); |
755 |
break;
|
756 |
case 0x10 ... 0x17: |
757 |
case 0x18 ... 0x1f: |
758 |
case 0x20 ... 0x27: |
759 |
case 0x28: |
760 |
break;
|
761 |
case 0x30: |
762 |
s->icr[0] = val;
|
763 |
apic_deliver(s, (s->icr[1] >> 24) & 0xff, (s->icr[0] >> 11) & 1, |
764 |
(s->icr[0] >> 8) & 7, (s->icr[0] & 0xff), |
765 |
(s->icr[0] >> 14) & 1, (s->icr[0] >> 15) & 1); |
766 |
break;
|
767 |
case 0x31: |
768 |
s->icr[1] = val;
|
769 |
break;
|
770 |
case 0x32 ... 0x37: |
771 |
{ |
772 |
int n = index - 0x32; |
773 |
s->lvt[n] = val; |
774 |
if (n == APIC_LVT_TIMER)
|
775 |
apic_timer_update(s, qemu_get_clock(vm_clock)); |
776 |
} |
777 |
break;
|
778 |
case 0x38: |
779 |
s->initial_count = val; |
780 |
s->initial_count_load_time = qemu_get_clock(vm_clock); |
781 |
apic_timer_update(s, s->initial_count_load_time); |
782 |
break;
|
783 |
case 0x39: |
784 |
break;
|
785 |
case 0x3e: |
786 |
{ |
787 |
int v;
|
788 |
s->divide_conf = val & 0xb;
|
789 |
v = (s->divide_conf & 3) | ((s->divide_conf >> 1) & 4); |
790 |
s->count_shift = (v + 1) & 7; |
791 |
} |
792 |
break;
|
793 |
default:
|
794 |
s->esr |= ESR_ILLEGAL_ADDRESS; |
795 |
break;
|
796 |
} |
797 |
} |
798 |
|
799 |
static void apic_save(QEMUFile *f, void *opaque) |
800 |
{ |
801 |
APICState *s = opaque; |
802 |
int i;
|
803 |
|
804 |
qemu_put_be32s(f, &s->apicbase); |
805 |
qemu_put_8s(f, &s->id); |
806 |
qemu_put_8s(f, &s->arb_id); |
807 |
qemu_put_8s(f, &s->tpr); |
808 |
qemu_put_be32s(f, &s->spurious_vec); |
809 |
qemu_put_8s(f, &s->log_dest); |
810 |
qemu_put_8s(f, &s->dest_mode); |
811 |
for (i = 0; i < 8; i++) { |
812 |
qemu_put_be32s(f, &s->isr[i]); |
813 |
qemu_put_be32s(f, &s->tmr[i]); |
814 |
qemu_put_be32s(f, &s->irr[i]); |
815 |
} |
816 |
for (i = 0; i < APIC_LVT_NB; i++) { |
817 |
qemu_put_be32s(f, &s->lvt[i]); |
818 |
} |
819 |
qemu_put_be32s(f, &s->esr); |
820 |
qemu_put_be32s(f, &s->icr[0]);
|
821 |
qemu_put_be32s(f, &s->icr[1]);
|
822 |
qemu_put_be32s(f, &s->divide_conf); |
823 |
qemu_put_be32(f, s->count_shift); |
824 |
qemu_put_be32s(f, &s->initial_count); |
825 |
qemu_put_be64(f, s->initial_count_load_time); |
826 |
qemu_put_be64(f, s->next_time); |
827 |
|
828 |
qemu_put_timer(f, s->timer); |
829 |
} |
830 |
|
831 |
static int apic_load(QEMUFile *f, void *opaque, int version_id) |
832 |
{ |
833 |
APICState *s = opaque; |
834 |
int i;
|
835 |
|
836 |
if (version_id > 2) |
837 |
return -EINVAL;
|
838 |
|
839 |
/* XXX: what if the base changes? (registered memory regions) */
|
840 |
qemu_get_be32s(f, &s->apicbase); |
841 |
qemu_get_8s(f, &s->id); |
842 |
qemu_get_8s(f, &s->arb_id); |
843 |
qemu_get_8s(f, &s->tpr); |
844 |
qemu_get_be32s(f, &s->spurious_vec); |
845 |
qemu_get_8s(f, &s->log_dest); |
846 |
qemu_get_8s(f, &s->dest_mode); |
847 |
for (i = 0; i < 8; i++) { |
848 |
qemu_get_be32s(f, &s->isr[i]); |
849 |
qemu_get_be32s(f, &s->tmr[i]); |
850 |
qemu_get_be32s(f, &s->irr[i]); |
851 |
} |
852 |
for (i = 0; i < APIC_LVT_NB; i++) { |
853 |
qemu_get_be32s(f, &s->lvt[i]); |
854 |
} |
855 |
qemu_get_be32s(f, &s->esr); |
856 |
qemu_get_be32s(f, &s->icr[0]);
|
857 |
qemu_get_be32s(f, &s->icr[1]);
|
858 |
qemu_get_be32s(f, &s->divide_conf); |
859 |
s->count_shift=qemu_get_be32(f); |
860 |
qemu_get_be32s(f, &s->initial_count); |
861 |
s->initial_count_load_time=qemu_get_be64(f); |
862 |
s->next_time=qemu_get_be64(f); |
863 |
|
864 |
if (version_id >= 2) |
865 |
qemu_get_timer(f, s->timer); |
866 |
return 0; |
867 |
} |
868 |
|
869 |
static void apic_reset(void *opaque) |
870 |
{ |
871 |
APICState *s = opaque; |
872 |
|
873 |
s->apicbase = 0xfee00000 |
|
874 |
(s->id ? 0 : MSR_IA32_APICBASE_BSP) | MSR_IA32_APICBASE_ENABLE;
|
875 |
|
876 |
apic_init_ipi(s); |
877 |
|
878 |
if (s->id == 0) { |
879 |
/*
|
880 |
* LINT0 delivery mode on CPU #0 is set to ExtInt at initialization
|
881 |
* time typically by BIOS, so PIC interrupt can be delivered to the
|
882 |
* processor when local APIC is enabled.
|
883 |
*/
|
884 |
s->lvt[APIC_LVT_LINT0] = 0x700;
|
885 |
} |
886 |
} |
887 |
|
888 |
static CPUReadMemoryFunc *apic_mem_read[3] = { |
889 |
apic_mem_readb, |
890 |
apic_mem_readw, |
891 |
apic_mem_readl, |
892 |
}; |
893 |
|
894 |
static CPUWriteMemoryFunc *apic_mem_write[3] = { |
895 |
apic_mem_writeb, |
896 |
apic_mem_writew, |
897 |
apic_mem_writel, |
898 |
}; |
899 |
|
900 |
int apic_init(CPUState *env)
|
901 |
{ |
902 |
APICState *s; |
903 |
|
904 |
if (last_apic_id >= MAX_APICS)
|
905 |
return -1; |
906 |
s = qemu_mallocz(sizeof(APICState));
|
907 |
if (!s)
|
908 |
return -1; |
909 |
env->apic_state = s; |
910 |
s->id = last_apic_id++; |
911 |
env->cpuid_apic_id = s->id; |
912 |
s->cpu_env = env; |
913 |
|
914 |
apic_reset(s); |
915 |
|
916 |
/* XXX: mapping more APICs at the same memory location */
|
917 |
if (apic_io_memory == 0) { |
918 |
/* NOTE: the APIC is directly connected to the CPU - it is not
|
919 |
on the global memory bus. */
|
920 |
apic_io_memory = cpu_register_io_memory(0, apic_mem_read,
|
921 |
apic_mem_write, NULL);
|
922 |
cpu_register_physical_memory(s->apicbase & ~0xfff, 0x1000, |
923 |
apic_io_memory); |
924 |
} |
925 |
s->timer = qemu_new_timer(vm_clock, apic_timer, s); |
926 |
|
927 |
register_savevm("apic", s->id, 2, apic_save, apic_load, s); |
928 |
qemu_register_reset(apic_reset, s); |
929 |
|
930 |
local_apics[s->id] = s; |
931 |
return 0; |
932 |
} |
933 |
|
934 |
static void ioapic_service(IOAPICState *s) |
935 |
{ |
936 |
uint8_t i; |
937 |
uint8_t trig_mode; |
938 |
uint8_t vector; |
939 |
uint8_t delivery_mode; |
940 |
uint32_t mask; |
941 |
uint64_t entry; |
942 |
uint8_t dest; |
943 |
uint8_t dest_mode; |
944 |
uint8_t polarity; |
945 |
uint32_t deliver_bitmask[MAX_APIC_WORDS]; |
946 |
|
947 |
for (i = 0; i < IOAPIC_NUM_PINS; i++) { |
948 |
mask = 1 << i;
|
949 |
if (s->irr & mask) {
|
950 |
entry = s->ioredtbl[i]; |
951 |
if (!(entry & APIC_LVT_MASKED)) {
|
952 |
trig_mode = ((entry >> 15) & 1); |
953 |
dest = entry >> 56;
|
954 |
dest_mode = (entry >> 11) & 1; |
955 |
delivery_mode = (entry >> 8) & 7; |
956 |
polarity = (entry >> 13) & 1; |
957 |
if (trig_mode == APIC_TRIGGER_EDGE)
|
958 |
s->irr &= ~mask; |
959 |
if (delivery_mode == APIC_DM_EXTINT)
|
960 |
vector = pic_read_irq(isa_pic); |
961 |
else
|
962 |
vector = entry & 0xff;
|
963 |
|
964 |
apic_get_delivery_bitmask(deliver_bitmask, dest, dest_mode); |
965 |
apic_bus_deliver(deliver_bitmask, delivery_mode, |
966 |
vector, polarity, trig_mode); |
967 |
} |
968 |
} |
969 |
} |
970 |
} |
971 |
|
972 |
void ioapic_set_irq(void *opaque, int vector, int level) |
973 |
{ |
974 |
IOAPICState *s = opaque; |
975 |
|
976 |
if (vector >= 0 && vector < IOAPIC_NUM_PINS) { |
977 |
uint32_t mask = 1 << vector;
|
978 |
uint64_t entry = s->ioredtbl[vector]; |
979 |
|
980 |
if ((entry >> 15) & 1) { |
981 |
/* level triggered */
|
982 |
if (level) {
|
983 |
s->irr |= mask; |
984 |
ioapic_service(s); |
985 |
} else {
|
986 |
s->irr &= ~mask; |
987 |
} |
988 |
} else {
|
989 |
/* edge triggered */
|
990 |
if (level) {
|
991 |
s->irr |= mask; |
992 |
ioapic_service(s); |
993 |
} |
994 |
} |
995 |
} |
996 |
} |
997 |
|
998 |
static uint32_t ioapic_mem_readl(void *opaque, target_phys_addr_t addr) |
999 |
{ |
1000 |
IOAPICState *s = opaque; |
1001 |
int index;
|
1002 |
uint32_t val = 0;
|
1003 |
|
1004 |
addr &= 0xff;
|
1005 |
if (addr == 0x00) { |
1006 |
val = s->ioregsel; |
1007 |
} else if (addr == 0x10) { |
1008 |
switch (s->ioregsel) {
|
1009 |
case 0x00: |
1010 |
val = s->id << 24;
|
1011 |
break;
|
1012 |
case 0x01: |
1013 |
val = 0x11 | ((IOAPIC_NUM_PINS - 1) << 16); /* version 0x11 */ |
1014 |
break;
|
1015 |
case 0x02: |
1016 |
val = 0;
|
1017 |
break;
|
1018 |
default:
|
1019 |
index = (s->ioregsel - 0x10) >> 1; |
1020 |
if (index >= 0 && index < IOAPIC_NUM_PINS) { |
1021 |
if (s->ioregsel & 1) |
1022 |
val = s->ioredtbl[index] >> 32;
|
1023 |
else
|
1024 |
val = s->ioredtbl[index] & 0xffffffff;
|
1025 |
} |
1026 |
} |
1027 |
#ifdef DEBUG_IOAPIC
|
1028 |
printf("I/O APIC read: %08x = %08x\n", s->ioregsel, val);
|
1029 |
#endif
|
1030 |
} |
1031 |
return val;
|
1032 |
} |
1033 |
|
1034 |
static void ioapic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val) |
1035 |
{ |
1036 |
IOAPICState *s = opaque; |
1037 |
int index;
|
1038 |
|
1039 |
addr &= 0xff;
|
1040 |
if (addr == 0x00) { |
1041 |
s->ioregsel = val; |
1042 |
return;
|
1043 |
} else if (addr == 0x10) { |
1044 |
#ifdef DEBUG_IOAPIC
|
1045 |
printf("I/O APIC write: %08x = %08x\n", s->ioregsel, val);
|
1046 |
#endif
|
1047 |
switch (s->ioregsel) {
|
1048 |
case 0x00: |
1049 |
s->id = (val >> 24) & 0xff; |
1050 |
return;
|
1051 |
case 0x01: |
1052 |
case 0x02: |
1053 |
return;
|
1054 |
default:
|
1055 |
index = (s->ioregsel - 0x10) >> 1; |
1056 |
if (index >= 0 && index < IOAPIC_NUM_PINS) { |
1057 |
if (s->ioregsel & 1) { |
1058 |
s->ioredtbl[index] &= 0xffffffff;
|
1059 |
s->ioredtbl[index] |= (uint64_t)val << 32;
|
1060 |
} else {
|
1061 |
s->ioredtbl[index] &= ~0xffffffffULL;
|
1062 |
s->ioredtbl[index] |= val; |
1063 |
} |
1064 |
ioapic_service(s); |
1065 |
} |
1066 |
} |
1067 |
} |
1068 |
} |
1069 |
|
1070 |
static void ioapic_save(QEMUFile *f, void *opaque) |
1071 |
{ |
1072 |
IOAPICState *s = opaque; |
1073 |
int i;
|
1074 |
|
1075 |
qemu_put_8s(f, &s->id); |
1076 |
qemu_put_8s(f, &s->ioregsel); |
1077 |
for (i = 0; i < IOAPIC_NUM_PINS; i++) { |
1078 |
qemu_put_be64s(f, &s->ioredtbl[i]); |
1079 |
} |
1080 |
} |
1081 |
|
1082 |
static int ioapic_load(QEMUFile *f, void *opaque, int version_id) |
1083 |
{ |
1084 |
IOAPICState *s = opaque; |
1085 |
int i;
|
1086 |
|
1087 |
if (version_id != 1) |
1088 |
return -EINVAL;
|
1089 |
|
1090 |
qemu_get_8s(f, &s->id); |
1091 |
qemu_get_8s(f, &s->ioregsel); |
1092 |
for (i = 0; i < IOAPIC_NUM_PINS; i++) { |
1093 |
qemu_get_be64s(f, &s->ioredtbl[i]); |
1094 |
} |
1095 |
return 0; |
1096 |
} |
1097 |
|
1098 |
static void ioapic_reset(void *opaque) |
1099 |
{ |
1100 |
IOAPICState *s = opaque; |
1101 |
int i;
|
1102 |
|
1103 |
memset(s, 0, sizeof(*s)); |
1104 |
for(i = 0; i < IOAPIC_NUM_PINS; i++) |
1105 |
s->ioredtbl[i] = 1 << 16; /* mask LVT */ |
1106 |
} |
1107 |
|
1108 |
static CPUReadMemoryFunc *ioapic_mem_read[3] = { |
1109 |
ioapic_mem_readl, |
1110 |
ioapic_mem_readl, |
1111 |
ioapic_mem_readl, |
1112 |
}; |
1113 |
|
1114 |
static CPUWriteMemoryFunc *ioapic_mem_write[3] = { |
1115 |
ioapic_mem_writel, |
1116 |
ioapic_mem_writel, |
1117 |
ioapic_mem_writel, |
1118 |
}; |
1119 |
|
1120 |
IOAPICState *ioapic_init(void)
|
1121 |
{ |
1122 |
IOAPICState *s; |
1123 |
int io_memory;
|
1124 |
|
1125 |
s = qemu_mallocz(sizeof(IOAPICState));
|
1126 |
if (!s)
|
1127 |
return NULL; |
1128 |
ioapic_reset(s); |
1129 |
s->id = last_apic_id++; |
1130 |
|
1131 |
io_memory = cpu_register_io_memory(0, ioapic_mem_read,
|
1132 |
ioapic_mem_write, s); |
1133 |
cpu_register_physical_memory(0xfec00000, 0x1000, io_memory); |
1134 |
|
1135 |
register_savevm("ioapic", 0, 1, ioapic_save, ioapic_load, s); |
1136 |
qemu_register_reset(ioapic_reset, s); |
1137 |
|
1138 |
return s;
|
1139 |
} |