void intr_enable()
{
uint8_t id = apic_get_id();
if (intr_sema[id] == 0)
{
kprintf("Bug: intr_enable!\n");
BREAK();
asm("hlt");
}
if (--intr_sema[id] == 0)
asm("sti");
}
ac_bool test_apic() {
ac_bool error = AC_FALSE;
initialize_apic();
ac_u64 msr_apic_base = get_msr(MSR_IA32_APIC_BASE);
error |= AC_TEST(msr_apic_base != 0);
ac_printf("msr_apic_base=0x%llx\n",msr_apic_base);
ac_printf(" bsp=%d\n", AC_GET_BITS(ac_u32, msr_apic_base, 8, 1));
ac_printf(" extd=%d\n", AC_GET_BITS(ac_u32, msr_apic_base, 10, 1));
ac_printf(" e=%d\n", AC_GET_BITS(ac_u32, msr_apic_base, 11, 1));
ac_u64 phy_addr = apic_get_physical_addr();
ac_printf(" phy_addr=0x%llx\n", phy_addr);
error |= AC_TEST(phy_addr != 0);
ac_u32 local_id = apic_get_id();
ac_printf(" local_id=0x%x\n", local_id);
return error;
}
uint64_t task_switch(all_regs *r)
{
uint8_t id = apic_get_id();
if (curr[id] != 0)
{
// Если задача запускается, для нее подготовлены регистры
if (curr[id]->state == TASK_STARTING)
{
curr[id]->state = TASK_RUNNING;
curr[id]->r.reg1 = r->reg1;
} else {
memcpy(&(curr[id]->r), r, sizeof(all_regs));
curr[id]->state = TASK_ACTIVE;
do
{
curr[id] = curr[id]->next;
} while(curr[id]->state != TASK_ACTIVE);
}
// Стек, с которого будем восстанавливать регистры
return &(curr[id]->r);
}
return r;
}
void
apic_init (struct cpu * core)
{
struct apic_dev * apic = NULL;
ulong_t base_addr;
uint32_t val;
apic = (struct apic_dev*)malloc(sizeof(struct apic_dev));
if (!apic) {
panic("Could not allocate apic struct\n");
}
memset(apic, 0, sizeof(struct apic_dev));
core->apic = apic;
if (!check_apic_avail()) {
panic("No APIC found on core %u, dying\n", core->id);
}
/* In response to AMD erratum #663
* the damn thing may give us lint interrupts
* even when we have them masked
*/
if (nk_is_amd() && cpuid_get_family() == 0x15) {
APIC_DEBUG("Writing Bridge Ctrl MSR for AMD Errata #663\n");
msr_write(AMD_MSR_NBRIDGE_CTL,
msr_read(AMD_MSR_NBRIDGE_CTL) |
(1ULL<<23) |
(1ULL<<54));
}
base_addr = apic_get_base_addr();
/* idempotent when not compiled as HRT */
apic->base_addr = pa_to_va(base_addr);
#ifndef NAUT_CONFIG_HVM_HRT
if (core->is_bsp) {
/* map in the lapic as uncacheable */
if (nk_map_page_nocache(apic->base_addr, PTE_PRESENT_BIT|PTE_WRITABLE_BIT, PS_4K) == -1) {
panic("Could not map APIC\n");
}
}
#endif
apic->version = apic_get_version(apic);
apic->id = apic_get_id(apic);
#ifndef NAUT_CONFIG_XEON_PHI
if (apic->version < 0x10 || apic->version > 0x15) {
panic("Unsupported APIC version (0x%1x)\n", (unsigned)apic->version);
}
#endif
val = apic_read(apic, APIC_REG_LDR) & ~APIC_LDR_MASK;
val |= SET_APIC_LOGICAL_ID(0);
apic_write(apic, APIC_REG_LDR, val);
apic_write(apic, APIC_REG_TPR, apic_read(apic, APIC_REG_TPR) & 0xffffff00); // accept all interrupts
apic_write(apic, APIC_REG_LVTT, APIC_DEL_MODE_FIXED | APIC_LVT_DISABLED); // disable timer interrupts intially
apic_write(apic, APIC_REG_LVTPC, APIC_DEL_MODE_FIXED | APIC_LVT_DISABLED | APIC_PC_INT_VEC); // disable perf cntr interrupts
apic_write(apic, APIC_REG_LVTTHMR, APIC_DEL_MODE_FIXED | APIC_LVT_DISABLED | APIC_THRML_INT_VEC); // disable thermal interrupts
/* do we have AMD extended LVT entries to deal with */
if (nk_is_amd() && amd_has_ext_lvt(apic)) {
amd_setup_ext_lvt(apic);
}
/* mask 8259a interrupts */
apic_write(apic, APIC_REG_LVT0, APIC_DEL_MODE_EXTINT | APIC_LVT_DISABLED);
/* only BSP takes NMI interrupts */
apic_write(apic, APIC_REG_LVT1,
APIC_DEL_MODE_NMI | (core->is_bsp ? 0 : APIC_LVT_DISABLED));
apic_write(apic, APIC_REG_LVTERR, APIC_DEL_MODE_FIXED | APIC_ERROR_INT_VEC); // allow error interrupts
// clear the ESR
apic_write(apic, APIC_REG_ESR, 0u);
apic_global_enable();
// assign interrupt handlers
if (core->is_bsp) {
if (register_int_handler(APIC_NULL_KICK_VEC, null_kick, apic) != 0) {
panic("Could not register null kick interrupt handler\n");
}
if (register_int_handler(APIC_SPUR_INT_VEC, spur_int_handler, apic) != 0) {
panic("Could not register spurious interrupt handler\n");
}
if (register_int_handler(APIC_ERROR_INT_VEC, error_int_handler, apic) != 0) {
panic("Could not register spurious interrupt handler\n");
return;
}
/* we shouldn't ever get these, but just in case */
if (register_int_handler(APIC_PC_INT_VEC, pc_int_handler, apic) != 0) {
panic("Could not register perf counter interrupt handler\n");
return;
}
if (register_int_handler(APIC_THRML_INT_VEC, thermal_int_handler, apic) != 0) {
panic("Could not register thermal interrupt handler\n");
return;
}
if (register_int_handler(APIC_EXT_LVT_DUMMY_VEC, dummy_int_handler, apic) != 0) {
panic("Could not register dummy ext lvt handler\n");
return;
}
}
apic_assign_spiv(apic, APIC_SPUR_INT_VEC);
/* turn it on */
apic_sw_enable(apic);
/* pass in quantum as milliseconds */
#ifndef NAUT_CONFIG_XEON_PHI
apic_timer_setup(apic, 1000/NAUT_CONFIG_HZ);
#endif
apic_dump(apic);
}
void intr_disable()
{
uint8_t id = apic_get_id();
intr_sema[id]++;
asm("cli");
}
void ipi_notify_init(void)
{
my_arch_id = apic_get_id();
// Publish the address of the notify page in the global kernel state
global->notify[my_arch_id] = local_phys_to_gen_phys(mem_to_local_phys((lvaddr_t)my_notify_page));
}
