2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 #include <devices/apic.h>
22 #include <devices/apic_regs.h>
23 #include <palacios/vmm.h>
24 #include <palacios/vmm_msr.h>
25 #include <palacios/vmm_sprintf.h>
26 #include <palacios/vm_guest.h>
28 #ifndef CONFIG_DEBUG_APIC
30 #define PrintDebug(fmt, args...)
34 typedef enum { APIC_TMR_INT, APIC_THERM_INT, APIC_PERF_INT,
35 APIC_LINT0_INT, APIC_LINT1_INT, APIC_ERR_INT } apic_irq_type_t;
37 #define APIC_FIXED_DELIVERY 0x0
38 #define APIC_SMI_DELIVERY 0x2
39 #define APIC_NMI_DELIVERY 0x4
40 #define APIC_INIT_DELIVERY 0x5
41 #define APIC_EXTINT_DELIVERY 0x7
44 #define BASE_ADDR_MSR 0x0000001B
45 #define DEFAULT_BASE_ADDR 0xfee00000
47 #define APIC_ID_OFFSET 0x020
48 #define APIC_VERSION_OFFSET 0x030
49 #define TPR_OFFSET 0x080
50 #define APR_OFFSET 0x090
51 #define PPR_OFFSET 0x0a0
52 #define EOI_OFFSET 0x0b0
53 #define REMOTE_READ_OFFSET 0x0c0
54 #define LDR_OFFSET 0x0d0
55 #define DFR_OFFSET 0x0e0
56 #define SPURIOUS_INT_VEC_OFFSET 0x0f0
58 #define ISR_OFFSET0 0x100 // 0x100 - 0x170
59 #define ISR_OFFSET1 0x110 // 0x100 - 0x170
60 #define ISR_OFFSET2 0x120 // 0x100 - 0x170
61 #define ISR_OFFSET3 0x130 // 0x100 - 0x170
62 #define ISR_OFFSET4 0x140 // 0x100 - 0x170
63 #define ISR_OFFSET5 0x150 // 0x100 - 0x170
64 #define ISR_OFFSET6 0x160 // 0x100 - 0x170
65 #define ISR_OFFSET7 0x170 // 0x100 - 0x170
67 #define TRIG_OFFSET0 0x180 // 0x180 - 0x1f0
68 #define TRIG_OFFSET1 0x190 // 0x180 - 0x1f0
69 #define TRIG_OFFSET2 0x1a0 // 0x180 - 0x1f0
70 #define TRIG_OFFSET3 0x1b0 // 0x180 - 0x1f0
71 #define TRIG_OFFSET4 0x1c0 // 0x180 - 0x1f0
72 #define TRIG_OFFSET5 0x1d0 // 0x180 - 0x1f0
73 #define TRIG_OFFSET6 0x1e0 // 0x180 - 0x1f0
74 #define TRIG_OFFSET7 0x1f0 // 0x180 - 0x1f0
77 #define IRR_OFFSET0 0x200 // 0x200 - 0x270
78 #define IRR_OFFSET1 0x210 // 0x200 - 0x270
79 #define IRR_OFFSET2 0x220 // 0x200 - 0x270
80 #define IRR_OFFSET3 0x230 // 0x200 - 0x270
81 #define IRR_OFFSET4 0x240 // 0x200 - 0x270
82 #define IRR_OFFSET5 0x250 // 0x200 - 0x270
83 #define IRR_OFFSET6 0x260 // 0x200 - 0x270
84 #define IRR_OFFSET7 0x270 // 0x200 - 0x270
87 #define ESR_OFFSET 0x280
88 #define INT_CMD_LO_OFFSET 0x300
89 #define INT_CMD_HI_OFFSET 0x310
90 #define TMR_LOC_VEC_TBL_OFFSET 0x320
91 #define THERM_LOC_VEC_TBL_OFFSET 0x330
92 #define PERF_CTR_LOC_VEC_TBL_OFFSET 0x340
93 #define LINT0_VEC_TBL_OFFSET 0x350
94 #define LINT1_VEC_TBL_OFFSET 0x360
95 #define ERR_VEC_TBL_OFFSET 0x370
96 #define TMR_INIT_CNT_OFFSET 0x380
97 #define TMR_CUR_CNT_OFFSET 0x390
98 #define TMR_DIV_CFG_OFFSET 0x3e0
99 #define EXT_APIC_FEATURE_OFFSET 0x400
100 #define EXT_APIC_CMD_OFFSET 0x410
101 #define SEOI_OFFSET 0x420
103 #define IER_OFFSET0 0x480 // 0x480 - 0x4f0
104 #define IER_OFFSET1 0x490 // 0x480 - 0x4f0
105 #define IER_OFFSET2 0x4a0 // 0x480 - 0x4f0
106 #define IER_OFFSET3 0x4b0 // 0x480 - 0x4f0
107 #define IER_OFFSET4 0x4c0 // 0x480 - 0x4f0
108 #define IER_OFFSET5 0x4d0 // 0x480 - 0x4f0
109 #define IER_OFFSET6 0x4e0 // 0x480 - 0x4f0
110 #define IER_OFFSET7 0x4f0 // 0x480 - 0x4f0
112 #define EXT_INT_LOC_VEC_TBL_OFFSET0 0x500 // 0x500 - 0x530
113 #define EXT_INT_LOC_VEC_TBL_OFFSET1 0x510 // 0x500 - 0x530
114 #define EXT_INT_LOC_VEC_TBL_OFFSET2 0x520 // 0x500 - 0x530
115 #define EXT_INT_LOC_VEC_TBL_OFFSET3 0x530 // 0x500 - 0x530
124 uint_t bootstrap_cpu : 1;
126 uint_t apic_enable : 1;
127 ullong_t base_addr : 40;
129 } __attribute__((packed));
130 } __attribute__((packed));
131 } __attribute__((packed));
140 v3_msr_t base_addr_msr;
143 /* memory map registers */
145 struct lapic_id_reg lapic_id;
146 struct apic_ver_reg apic_ver;
147 struct ext_apic_ctrl_reg ext_apic_ctrl;
148 struct local_vec_tbl_reg local_vec_tbl;
149 struct tmr_vec_tbl_reg tmr_vec_tbl;
150 struct tmr_div_cfg_reg tmr_div_cfg;
151 struct lint_vec_tbl_reg lint0_vec_tbl;
152 struct lint_vec_tbl_reg lint1_vec_tbl;
153 struct perf_ctr_loc_vec_tbl_reg perf_ctr_loc_vec_tbl;
154 struct therm_loc_vec_tbl_reg therm_loc_vec_tbl;
155 struct err_vec_tbl_reg err_vec_tbl;
156 struct err_status_reg err_status;
157 struct spurious_int_reg spurious_int;
158 struct int_cmd_reg int_cmd;
159 struct log_dst_reg log_dst;
160 struct dst_fmt_reg dst_fmt;
161 struct arb_prio_reg arb_prio;
162 struct task_prio_reg task_prio;
163 struct proc_prio_reg proc_prio;
164 struct ext_apic_feature_reg ext_apic_feature;
165 struct spec_eoi_reg spec_eoi;
168 uint32_t tmr_cur_cnt;
169 uint32_t tmr_init_cnt;
172 struct local_vec_tbl_reg ext_intr_vec_tbl[4];
174 uint32_t rem_rd_data;
177 uchar_t int_req_reg[32];
178 uchar_t int_svc_reg[32];
179 uchar_t int_en_reg[32];
180 uchar_t trig_mode_reg[32];
185 struct guest_info * core;
188 static void apic_incoming_ipi(void *val);
189 static int apic_read(addr_t guest_addr, void * dst, uint_t length, void * priv_data);
190 static int apic_write(addr_t guest_addr, void * src, uint_t length, void * priv_data);
192 static void init_apic_state(struct apic_state * apic) {
193 apic->base_addr = DEFAULT_BASE_ADDR;
194 apic->base_addr_msr.value = 0x0000000000000900LL;
195 apic->base_addr_msr.value |= ((uint64_t)DEFAULT_BASE_ADDR);
197 PrintDebug("Sizeof Interrupt Request Register %d, should be 32\n",
198 (uint_t)sizeof(apic->int_req_reg));
200 memset(apic->int_req_reg, 0, sizeof(apic->int_req_reg));
201 memset(apic->int_svc_reg, 0, sizeof(apic->int_svc_reg));
202 memset(apic->int_en_reg, 0xff, sizeof(apic->int_en_reg));
203 memset(apic->trig_mode_reg, 0, sizeof(apic->trig_mode_reg));
205 apic->eoi = 0x00000000;
206 apic->rem_rd_data = 0x00000000;
207 apic->tmr_init_cnt = 0x00000000;
208 apic->tmr_cur_cnt = 0x00000000;
211 // We need to figure out what the APIC ID is....
212 apic->lapic_id.val = 0x00000000;
214 // The P6 has 6 LVT entries, so we set the value to (6-1)...
215 apic->apic_ver.val = 0x80050010;
217 apic->task_prio.val = 0x00000000;
218 apic->arb_prio.val = 0x00000000;
219 apic->proc_prio.val = 0x00000000;
220 apic->log_dst.val = 0x00000000;
221 apic->dst_fmt.val = 0xffffffff;
222 apic->spurious_int.val = 0x000000ff;
223 apic->err_status.val = 0x00000000;
224 apic->int_cmd.val = 0x0000000000000000LL;
225 apic->tmr_vec_tbl.val = 0x00010000;
226 apic->therm_loc_vec_tbl.val = 0x00010000;
227 apic->perf_ctr_loc_vec_tbl.val = 0x00010000;
228 apic->lint0_vec_tbl.val = 0x00010000;
229 apic->lint1_vec_tbl.val = 0x00010000;
230 apic->err_vec_tbl.val = 0x00010000;
231 apic->tmr_div_cfg.val = 0x00000000;
232 //apic->ext_apic_feature.val = 0x00000007;
233 apic->ext_apic_feature.val = 0x00040007;
234 apic->ext_apic_ctrl.val = 0x00000000;
235 apic->spec_eoi.val = 0x00000000;
241 static int read_apic_msr(uint_t msr, v3_msr_t * dst, void * priv_data) {
242 struct vm_device * dev = (struct vm_device *)priv_data;
243 struct apic_state * apic = (struct apic_state *)dev->private_data;
244 dst->value = apic->base_addr;
249 static int write_apic_msr(uint_t msr, v3_msr_t src, void * priv_data) {
250 struct vm_device * dev = (struct vm_device *)priv_data;
251 struct apic_state * apic = (struct apic_state *)dev->private_data;
252 struct v3_shadow_region * old_reg = v3_get_shadow_region(dev->vm, apic->base_addr);
254 if (old_reg == NULL) {
256 PrintError("APIC Base address region does not exit...\n");
260 v3_delete_shadow_region(dev->vm, old_reg);
262 apic->base_addr = src.value;
264 if (v3_hook_full_mem(dev->vm, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, dev) == -1) {
265 PrintError("Could not hook new APIC Base address\n");
273 // irq_num is the bit offset into a 256 bit buffer...
274 static int activate_apic_irq(struct apic_state * apic, uint32_t irq_num) {
275 int major_offset = (irq_num & ~0x00000007) >> 3;
276 int minor_offset = irq_num & 0x00000007;
277 uchar_t * req_location = apic->int_req_reg + major_offset;
278 uchar_t * en_location = apic->int_en_reg + major_offset;
279 uchar_t flag = 0x1 << minor_offset;
282 PrintError("Attempting to raise an invalid interrupt: %d\n", irq_num);
286 PrintDebug("Raising APIC IRQ %d\n", irq_num);
288 if (*req_location & flag) {
289 //V3_Print("Interrupts coallescing\n");
292 if (*en_location & flag) {
293 *req_location |= flag;
295 PrintDebug("Interrupt not enabled... %.2x\n", *en_location);
304 static int get_highest_isr(struct apic_state * apic) {
307 // We iterate backwards to find the highest priority
308 for (i = 31; i >= 0; i--) {
309 uchar_t * svc_major = apic->int_svc_reg + i;
311 if ((*svc_major) & 0xff) {
312 for (j = 7; j >= 0; j--) {
313 uchar_t flag = 0x1 << j;
314 if ((*svc_major) & flag) {
315 return ((i * 8) + j);
326 static int get_highest_irr(struct apic_state * apic) {
329 // We iterate backwards to find the highest priority
330 for (i = 31; i >= 0; i--) {
331 uchar_t * req_major = apic->int_req_reg + i;
333 if ((*req_major) & 0xff) {
334 for (j = 7; j >= 0; j--) {
335 uchar_t flag = 0x1 << j;
336 if ((*req_major) & flag) {
337 return ((i * 8) + j);
349 static int apic_do_eoi(struct apic_state * apic) {
350 int isr_irq = get_highest_isr(apic);
353 int major_offset = (isr_irq & ~0x00000007) >> 3;
354 int minor_offset = isr_irq & 0x00000007;
355 uchar_t flag = 0x1 << minor_offset;
356 uchar_t * svc_location = apic->int_svc_reg + major_offset;
358 PrintDebug("Received APIC EOI for IRQ %d\n", isr_irq);
360 *svc_location &= ~flag;
362 #ifdef CONFIG_CRAY_XT
364 if ((isr_irq == 238) ||
366 PrintError("Acking IRQ %d\n", isr_irq);
369 if (isr_irq == 238) {
374 //PrintError("Spurious EOI...\n");
381 static int activate_internal_irq(struct apic_state * apic, apic_irq_type_t int_type) {
382 uint32_t vec_num = 0;
383 uint32_t del_mode = 0;
389 vec_num = apic->tmr_vec_tbl.vec;
390 del_mode = APIC_FIXED_DELIVERY;
391 masked = apic->tmr_vec_tbl.mask;
394 vec_num = apic->therm_loc_vec_tbl.vec;
395 del_mode = apic->therm_loc_vec_tbl.msg_type;
396 masked = apic->therm_loc_vec_tbl.mask;
399 vec_num = apic->perf_ctr_loc_vec_tbl.vec;
400 del_mode = apic->perf_ctr_loc_vec_tbl.msg_type;
401 masked = apic->perf_ctr_loc_vec_tbl.mask;
404 vec_num = apic->lint0_vec_tbl.vec;
405 del_mode = apic->lint0_vec_tbl.msg_type;
406 masked = apic->lint0_vec_tbl.mask;
409 vec_num = apic->lint1_vec_tbl.vec;
410 del_mode = apic->lint1_vec_tbl.msg_type;
411 masked = apic->lint1_vec_tbl.mask;
414 vec_num = apic->err_vec_tbl.vec;
415 del_mode = APIC_FIXED_DELIVERY;
416 masked = apic->err_vec_tbl.mask;
419 PrintError("Invalid APIC interrupt type\n");
423 // interrupt is masked, don't send
425 PrintDebug("Inerrupt is masked\n");
429 if (del_mode == APIC_FIXED_DELIVERY) {
430 //PrintDebug("Activating internal APIC IRQ %d\n", vec_num);
431 return activate_apic_irq(apic, vec_num);
433 PrintError("Unhandled Delivery Mode\n");
439 static int apic_read(addr_t guest_addr, void * dst, uint_t length, void * priv_data) {
440 struct vm_device * dev = (struct vm_device *)priv_data;
441 struct apic_state * apic = (struct apic_state *)dev->private_data;
442 addr_t reg_addr = guest_addr - apic->base_addr;
443 struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
447 PrintDebug("Read apic address space (%p)\n",
450 if (msr->apic_enable == 0) {
451 PrintError("Write to APIC address space with disabled APIC\n");
456 /* Because "May not be supported" doesn't matter to Linux developers... */
457 /* if (length != 4) { */
458 /* PrintError("Invalid apic read length (%d)\n", length); */
462 switch (reg_addr & ~0x3) {
464 // Well, only an idiot would read from a architectural write only register
466 // PrintError("Attempting to read from write only register\n");
472 val = apic->lapic_id.val;
474 case APIC_VERSION_OFFSET:
475 val = apic->apic_ver.val;
478 val = apic->task_prio.val;
481 val = apic->arb_prio.val;
484 val = apic->proc_prio.val;
486 case REMOTE_READ_OFFSET:
487 val = apic->rem_rd_data;
490 val = apic->log_dst.val;
493 val = apic->dst_fmt.val;
495 case SPURIOUS_INT_VEC_OFFSET:
496 val = apic->spurious_int.val;
499 val = apic->err_status.val;
501 case TMR_LOC_VEC_TBL_OFFSET:
502 val = apic->tmr_vec_tbl.val;
504 case LINT0_VEC_TBL_OFFSET:
505 val = apic->lint0_vec_tbl.val;
507 case LINT1_VEC_TBL_OFFSET:
508 val = apic->lint1_vec_tbl.val;
510 case ERR_VEC_TBL_OFFSET:
511 val = apic->err_vec_tbl.val;
513 case TMR_INIT_CNT_OFFSET:
514 val = apic->tmr_init_cnt;
516 case TMR_DIV_CFG_OFFSET:
517 val = apic->tmr_div_cfg.val;
521 val = *(uint32_t *)(apic->int_en_reg);
524 val = *(uint32_t *)(apic->int_en_reg + 4);
527 val = *(uint32_t *)(apic->int_en_reg + 8);
530 val = *(uint32_t *)(apic->int_en_reg + 12);
533 val = *(uint32_t *)(apic->int_en_reg + 16);
536 val = *(uint32_t *)(apic->int_en_reg + 20);
539 val = *(uint32_t *)(apic->int_en_reg + 24);
542 val = *(uint32_t *)(apic->int_en_reg + 28);
546 val = *(uint32_t *)(apic->int_svc_reg);
549 val = *(uint32_t *)(apic->int_svc_reg + 4);
552 val = *(uint32_t *)(apic->int_svc_reg + 8);
555 val = *(uint32_t *)(apic->int_svc_reg + 12);
558 val = *(uint32_t *)(apic->int_svc_reg + 16);
561 val = *(uint32_t *)(apic->int_svc_reg + 20);
564 val = *(uint32_t *)(apic->int_svc_reg + 24);
567 val = *(uint32_t *)(apic->int_svc_reg + 28);
571 val = *(uint32_t *)(apic->trig_mode_reg);
574 val = *(uint32_t *)(apic->trig_mode_reg + 4);
577 val = *(uint32_t *)(apic->trig_mode_reg + 8);
580 val = *(uint32_t *)(apic->trig_mode_reg + 12);
583 val = *(uint32_t *)(apic->trig_mode_reg + 16);
586 val = *(uint32_t *)(apic->trig_mode_reg + 20);
589 val = *(uint32_t *)(apic->trig_mode_reg + 24);
592 val = *(uint32_t *)(apic->trig_mode_reg + 28);
596 val = *(uint32_t *)(apic->int_req_reg);
599 val = *(uint32_t *)(apic->int_req_reg + 4);
602 val = *(uint32_t *)(apic->int_req_reg + 8);
605 val = *(uint32_t *)(apic->int_req_reg + 12);
608 val = *(uint32_t *)(apic->int_req_reg + 16);
611 val = *(uint32_t *)(apic->int_req_reg + 20);
614 val = *(uint32_t *)(apic->int_req_reg + 24);
617 val = *(uint32_t *)(apic->int_req_reg + 28);
619 case TMR_CUR_CNT_OFFSET:
620 val = apic->tmr_cur_cnt;
623 // We are not going to implement these....
624 case THERM_LOC_VEC_TBL_OFFSET:
625 val = apic->therm_loc_vec_tbl.val;
627 case PERF_CTR_LOC_VEC_TBL_OFFSET:
628 val = apic->perf_ctr_loc_vec_tbl.val;
634 case INT_CMD_LO_OFFSET:
635 val = apic->int_cmd.lo;
637 case INT_CMD_HI_OFFSET:
638 val = apic->int_cmd.hi;
641 // handle current timer count
643 // Unhandled Registers
644 case EXT_INT_LOC_VEC_TBL_OFFSET0:
645 val = apic->ext_intr_vec_tbl[0].val;
647 case EXT_INT_LOC_VEC_TBL_OFFSET1:
648 val = apic->ext_intr_vec_tbl[1].val;
650 case EXT_INT_LOC_VEC_TBL_OFFSET2:
651 val = apic->ext_intr_vec_tbl[2].val;
653 case EXT_INT_LOC_VEC_TBL_OFFSET3:
654 val = apic->ext_intr_vec_tbl[3].val;
658 case EXT_APIC_FEATURE_OFFSET:
659 case EXT_APIC_CMD_OFFSET:
663 PrintError("Read from Unhandled APIC Register: %x\n", (uint32_t)reg_addr);
669 uint_t byte_addr = reg_addr & 0x3;
670 uint8_t * val_ptr = (uint8_t *)dst;
672 *val_ptr = *(((uint8_t *)&val) + byte_addr);
674 } else if ((length == 2) &&
675 ((reg_addr & 0x3) == 0x3)) {
676 uint_t byte_addr = reg_addr & 0x3;
677 uint16_t * val_ptr = (uint16_t *)dst;
678 *val_ptr = *(((uint16_t *)&val) + byte_addr);
680 } else if (length == 4) {
681 uint32_t * val_ptr = (uint32_t *)dst;
685 PrintError("Invalid apic read length (%d)\n", length);
689 PrintDebug("Read finished (val=%x)\n", *(uint32_t *)dst);
695 static int apic_write(addr_t guest_addr, void * src, uint_t length, void * priv_data) {
696 struct vm_device * dev = (struct vm_device *)priv_data;
697 struct apic_state * apic = (struct apic_state *)dev->private_data;
698 addr_t reg_addr = guest_addr - apic->base_addr;
699 struct apic_msr * msr = (struct apic_msr *)&(apic->base_addr_msr.value);
700 uint32_t op_val = *(uint32_t *)src;
702 PrintDebug("Write to apic address space (%p) (val=%x)\n",
703 (void *)guest_addr, *(uint32_t *)src);
705 if (msr->apic_enable == 0) {
706 PrintError("Write to APIC address space with disabled APIC\n");
712 PrintError("Invalid apic write length (%d)\n", length);
717 case REMOTE_READ_OFFSET:
718 case APIC_VERSION_OFFSET:
745 case EXT_APIC_FEATURE_OFFSET:
747 PrintError("Attempting to write to read only register %p (ignored)\n", (void *)reg_addr);
749 PrintError("Attempting to write to read only register %p (error)\n", (void *)reg_addr);
756 apic->lapic_id.val = op_val;
759 apic->task_prio.val = op_val;
762 apic->log_dst.val = op_val;
765 apic->dst_fmt.val = op_val;
767 case SPURIOUS_INT_VEC_OFFSET:
768 apic->spurious_int.val = op_val;
771 apic->err_status.val = op_val;
773 case TMR_LOC_VEC_TBL_OFFSET:
774 apic->tmr_vec_tbl.val = op_val;
776 case THERM_LOC_VEC_TBL_OFFSET:
777 apic->therm_loc_vec_tbl.val = op_val;
779 case PERF_CTR_LOC_VEC_TBL_OFFSET:
780 apic->perf_ctr_loc_vec_tbl.val = op_val;
782 case LINT0_VEC_TBL_OFFSET:
783 apic->lint0_vec_tbl.val = op_val;
785 case LINT1_VEC_TBL_OFFSET:
786 apic->lint1_vec_tbl.val = op_val;
788 case ERR_VEC_TBL_OFFSET:
789 apic->err_vec_tbl.val = op_val;
791 case TMR_INIT_CNT_OFFSET:
792 apic->tmr_init_cnt = op_val;
793 apic->tmr_cur_cnt = op_val;
795 case TMR_CUR_CNT_OFFSET:
796 apic->tmr_cur_cnt = op_val;
798 case TMR_DIV_CFG_OFFSET:
799 apic->tmr_div_cfg.val = op_val;
803 // Enable mask (256 bits)
805 *(uint32_t *)(apic->int_en_reg) = op_val;
808 *(uint32_t *)(apic->int_en_reg + 4) = op_val;
811 *(uint32_t *)(apic->int_en_reg + 8) = op_val;
814 *(uint32_t *)(apic->int_en_reg + 12) = op_val;
817 *(uint32_t *)(apic->int_en_reg + 16) = op_val;
820 *(uint32_t *)(apic->int_en_reg + 20) = op_val;
823 *(uint32_t *)(apic->int_en_reg + 24) = op_val;
826 *(uint32_t *)(apic->int_en_reg + 28) = op_val;
829 case EXT_INT_LOC_VEC_TBL_OFFSET0:
830 apic->ext_intr_vec_tbl[0].val = op_val;
832 case EXT_INT_LOC_VEC_TBL_OFFSET1:
833 apic->ext_intr_vec_tbl[1].val = op_val;
835 case EXT_INT_LOC_VEC_TBL_OFFSET2:
836 apic->ext_intr_vec_tbl[2].val = op_val;
838 case EXT_INT_LOC_VEC_TBL_OFFSET3:
839 apic->ext_intr_vec_tbl[3].val = op_val;
849 case INT_CMD_LO_OFFSET:
850 apic->int_cmd.lo = op_val;
851 V3_Call_On_CPU(apic->int_cmd.dst, apic_incoming_ipi, (void *)apic->int_cmd.val);
854 case INT_CMD_HI_OFFSET:
855 apic->int_cmd.hi = op_val;
857 // Unhandled Registers
859 case EXT_APIC_CMD_OFFSET:
862 PrintError("Write to Unhandled APIC Register: %x\n", (uint32_t)reg_addr);
866 PrintDebug("Write finished\n");
873 /* Interrupt Controller Functions */
875 // returns 1 if an interrupt is pending, 0 otherwise
876 static int apic_intr_pending(struct guest_info * info, void * private_data) {
877 struct vm_device * dev = (struct vm_device *)private_data;
878 struct apic_state * apic = (struct apic_state *)dev->private_data;
879 int req_irq = get_highest_irr(apic);
880 int svc_irq = get_highest_isr(apic);
882 if ((req_irq >= 0) &&
883 (req_irq > svc_irq)) {
890 static int apic_get_intr_number(struct guest_info * info, void * private_data) {
891 struct vm_device * dev = (struct vm_device *)private_data;
892 struct apic_state * apic = (struct apic_state *)dev->private_data;
893 int req_irq = get_highest_irr(apic);
894 int svc_irq = get_highest_isr(apic);
898 } else if (svc_irq < req_irq) {
905 static int apic_raise_intr(struct guest_info * info, void * private_data, int irq) {
906 #ifdef CONFIG_CRAY_XT
907 // The Seastar is connected directly to the LAPIC via LINT0 on the ICC bus
910 struct vm_device * dev = (struct vm_device *)private_data;
911 struct apic_state * apic = (struct apic_state *)dev->private_data;
913 return activate_apic_irq(apic, irq);
920 static int apic_lower_intr(struct guest_info * info, void * private_data, int irq) {
924 static int apic_begin_irq(struct guest_info * info, void * private_data, int irq) {
925 struct vm_device * dev = (struct vm_device *)private_data;
926 struct apic_state * apic = (struct apic_state *)dev->private_data;
927 int major_offset = (irq & ~0x00000007) >> 3;
928 int minor_offset = irq & 0x00000007;
929 uchar_t * req_location = apic->int_req_reg + major_offset;
930 uchar_t * svc_location = apic->int_svc_reg + major_offset;
931 uchar_t flag = 0x01 << minor_offset;
933 *svc_location |= flag;
934 *req_location &= ~flag;
936 #ifdef CONFIG_CRAY_XT
937 if ((irq == 238) || (irq == 239)) {
938 PrintError("APIC: Begin IRQ %d (ISR=%x), (IRR=%x)\n", irq, *svc_location, *req_location);
947 int v3_apic_raise_intr(struct guest_info * info, struct vm_device * apic_dev, int intr_num) {
948 struct apic_state * apic = (struct apic_state *)apic_dev->private_data;
950 if (activate_apic_irq(apic, intr_num) == -1) {
951 PrintError("Error: Could not activate apic_irq\n");
955 v3_interrupt_cpu(info, 0);
962 /* Timer Functions */
963 static void apic_update_time(struct guest_info * info, ullong_t cpu_cycles, ullong_t cpu_freq, void * priv_data) {
964 struct vm_device * dev = (struct vm_device *)priv_data;
965 struct apic_state * apic = (struct apic_state *)dev->private_data;
966 // The 32 bit GCC runtime is a pile of shit
968 uint64_t tmr_ticks = 0;
970 uint32_t tmr_ticks = 0;
973 uchar_t tmr_div = *(uchar_t *)&(apic->tmr_div_cfg.val);
974 uint_t shift_num = 0;
977 // Check whether this is true:
978 // -> If the Init count is zero then the timer is disabled
979 // and doesn't just blitz interrupts to the CPU
980 if ((apic->tmr_init_cnt == 0) ||
981 ( (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_ONESHOT) &&
982 (apic->tmr_cur_cnt == 0))) {
983 //PrintDebug("APIC timer not yet initialized\n");
1001 case APIC_TMR_DIV16:
1004 case APIC_TMR_DIV32:
1007 case APIC_TMR_DIV64:
1010 case APIC_TMR_DIV128:
1014 PrintError("Invalid Timer Divider configuration\n");
1018 tmr_ticks = cpu_cycles >> shift_num;
1019 // PrintDebug("Timer Ticks: %p\n", (void *)tmr_ticks);
1021 if (tmr_ticks < apic->tmr_cur_cnt) {
1022 apic->tmr_cur_cnt -= tmr_ticks;
1024 tmr_ticks -= apic->tmr_cur_cnt;
1025 apic->tmr_cur_cnt = 0;
1028 PrintDebug("Raising APIC Timer interrupt (periodic=%d) (icnt=%d) (div=%d)\n",
1029 apic->tmr_vec_tbl.tmr_mode, apic->tmr_init_cnt, shift_num);
1031 if (apic_intr_pending(info, priv_data)) {
1032 PrintDebug("Overriding pending IRQ %d\n", apic_get_intr_number(dev->vm, priv_data));
1035 if (activate_internal_irq(apic, APIC_TMR_INT) == -1) {
1036 PrintError("Could not raise Timer interrupt\n");
1039 if (apic->tmr_vec_tbl.tmr_mode == APIC_TMR_PERIODIC) {
1040 tmr_ticks = tmr_ticks % apic->tmr_init_cnt;
1041 apic->tmr_cur_cnt = apic->tmr_init_cnt - tmr_ticks;
1048 static void apic_incoming_ipi(void *val)
1050 PrintError("In apic_incoming_ipi, val=%p\n", val);
1051 struct int_cmd_reg int_cmd;
1052 char *type = NULL, *dest;
1054 int_cmd.val = (uint64_t)val;
1055 switch (int_cmd.dst_shorthand)
1058 sprintf(foo, "%d", int_cmd.dst);
1065 dest = "(broadcast inclusive)";
1068 dest = "(broadcast)";
1071 switch (int_cmd.msg_type)
1086 PrintError("Receieved IPI on CPU %d type=%s dest=%s\n",
1087 V3_Get_CPU(), type, dest);
1088 //%p %s to CPU %d on CPU %d.\n", val, foo, type, dest, (int)V3_Get_CPU());
1093 static struct intr_ctrl_ops intr_ops = {
1094 .intr_pending = apic_intr_pending,
1095 .get_intr_number = apic_get_intr_number,
1096 .raise_intr = apic_raise_intr,
1097 .begin_irq = apic_begin_irq,
1098 .lower_intr = apic_lower_intr,
1102 static struct vm_timer_ops timer_ops = {
1103 .update_time = apic_update_time,
1109 static int apic_free(struct vm_device * dev) {
1110 // struct apic_state * apic = (struct apic_state *)dev->private_data;
1112 v3_unhook_msr(dev->vm, BASE_ADDR_MSR);
1118 static struct v3_device_ops dev_ops = {
1127 static int apic_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
1128 PrintDebug("Creating APIC\n");
1129 char * name = v3_cfg_val(cfg, "name");
1131 struct apic_state * apic = (struct apic_state *)V3_Malloc(sizeof(struct apic_state));
1133 struct vm_device * dev = v3_allocate_device(name, &dev_ops, apic);
1135 if (v3_attach_device(vm, dev) == -1) {
1136 PrintError("Could not attach device %s\n", name);
1140 v3_register_intr_controller(vm, &intr_ops, dev);
1141 v3_add_timer(vm, &timer_ops, dev);
1143 init_apic_state(apic);
1145 v3_hook_msr(vm, BASE_ADDR_MSR, read_apic_msr, write_apic_msr, dev);
1147 v3_hook_full_mem(vm, apic->base_addr, apic->base_addr + PAGE_SIZE_4KB, apic_read, apic_write, dev);
1154 device_register("LAPIC", apic_init)