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- Give the timer, thermal, and error LVT entries an interrupt vector even

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though these aren't used yet.
- Add missing function prototypes for some static functions.
- Allow lvt_mode() to handle an LVT entry with a delivery mode of fixed.
- Consolidate code duplicated in lapic_init() and lapic_setup() to program
  the spurious vector register of a local APIC in a static lapic_enable()
  function.
- Dump the timer, thermal, error, and performance counter LVT entries
  during lapic_dump().
- Program LVT pins (currently only LINT0 and LINT1) after the local
  APIC has been software enabled via lapic_enable() since otherwise the
  LVT programming will not be able to unmask LVT sources.
This commit is contained in:
John Baldwin 2004-12-23 20:42:53 +00:00
parent 4cddb026bb
commit 8c938cc290
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=139245
1 changed files with 30 additions and 22 deletions
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52
sys/i386/i386/local_apic.c
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@ -97,10 +97,10 @@ struct lapic {
static struct lvt lvts[LVT_MAX + 1] = {
{ 1, 1, 1, 1, APIC_LVT_DM_EXTINT, 0 }, /* LINT0: masked ExtINT */
{ 1, 1, 0, 1, APIC_LVT_DM_NMI, 0 }, /* LINT1: NMI */
{ 1, 1, 1, 1, APIC_LVT_DM_FIXED, 0 }, /* Timer: needs a vector */
{ 1, 1, 1, 1, APIC_LVT_DM_FIXED, 0 }, /* Error: needs a vector */
{ 1, 1, 1, 1, APIC_LVT_DM_FIXED, APIC_TIMER_INT }, /* Timer */
{ 1, 1, 1, 1, APIC_LVT_DM_FIXED, APIC_ERROR_INT }, /* Error */
{ 1, 1, 1, 1, APIC_LVT_DM_FIXED, 0 }, /* PMC */
{ 1, 1, 1, 1, APIC_LVT_DM_FIXED, 0 }, /* Thermal: needs a vector */
{ 1, 1, 1, 1, APIC_LVT_DM_FIXED, APIC_THERMAL_INT }, /* Thermal */
};
static inthand_t *ioint_handlers[] = {
@ -116,6 +116,9 @@ static inthand_t *ioint_handlers[] = {
volatile lapic_t *lapic;
static void lapic_enable(void);
static uint32_t lvt_mode(struct lapic *la, u_int pin, uint32_t value);
static uint32_t
lvt_mode(struct lapic *la, u_int pin, uint32_t value)
{
@ -149,11 +152,7 @@ lvt_mode(struct lapic *la, u_int pin, uint32_t value)
/* Use a vector of 0. */
break;
case APIC_LVT_DM_FIXED:
#if 0
value |= lvt->lvt_vector;
#else
panic("Fixed LINT pins not supported");
#endif
break;
default:
panic("bad APIC LVT delivery mode: %#x\n", value);
@ -167,7 +166,6 @@ lvt_mode(struct lapic *la, u_int pin, uint32_t value)
void
lapic_init(uintptr_t addr)
{
u_int32_t value;
/* Map the local APIC and setup the spurious interrupt handler. */
KASSERT(trunc_page(addr) == addr,
@ -177,10 +175,7 @@ lapic_init(uintptr_t addr)
GSEL(GCODE_SEL, SEL_KPL));
/* Perform basic initialization of the BSP's local APIC. */
value = lapic->svr;
value &= ~(APIC_SVR_VECTOR | APIC_SVR_FOCUS);
value |= (APIC_SVR_FEN | APIC_SVR_SWEN | APIC_SPURIOUS_INT);
lapic->svr = value;
lapic_enable();
/* Set BSP's per-CPU local APIC ID. */
PCPU_SET(apic_id, lapic_id());
@ -233,6 +228,9 @@ lapic_dump(const char* str)
lapic->id, lapic->version, lapic->ldr, lapic->dfr);
printf(" lint0: 0x%08x lint1: 0x%08x TPR: 0x%08x SVR: 0x%08x\n",
lapic->lvt_lint0, lapic->lvt_lint1, lapic->tpr, lapic->svr);
printf(" timer: 0x%08x therm: 0x%08x err: 0x%08x pcm: 0x%08x\n",
lapic->lvt_timer, lapic->lvt_thermal, lapic->lvt_error,
lapic->lvt_pcint);
}
void
@ -260,12 +258,6 @@ lapic_setup(void)
eflags = intr_disable();
maxlvt = (lapic->version & APIC_VER_MAXLVT) >> MAXLVTSHIFT;
/* Program LINT[01] LVT entries. */
lapic->lvt_lint0 = lvt_mode(la, LVT_LINT0, lapic->lvt_lint0);
lapic->lvt_lint1 = lvt_mode(la, LVT_LINT1, lapic->lvt_lint1);
/* XXX: more LVT entries */
/* Initialize the TPR to allow all interrupts. */
lapic_set_tpr(0);
@ -283,10 +275,14 @@ lapic_setup(void)
lapic->ldr = value;
/* Setup spurious vector and enable the local APIC. */
value = lapic->svr;
value &= ~(APIC_SVR_VECTOR | APIC_SVR_FOCUS);
value |= (APIC_SVR_FEN | APIC_SVR_SWEN | APIC_SPURIOUS_INT);
lapic->svr = value;
lapic_enable();
/* Program LINT[01] LVT entries. */
lapic->lvt_lint0 = lvt_mode(la, LVT_LINT0, lapic->lvt_lint0);
lapic->lvt_lint1 = lvt_mode(la, LVT_LINT1, lapic->lvt_lint1);
/* XXX: more LVT entries */
intr_restore(eflags);
}
@ -301,6 +297,18 @@ lapic_disable(void)
lapic->svr = value;
}
static void
lapic_enable(void)
{
u_int32_t value;
/* Program the spurious vector to enable the local APIC. */
value = lapic->svr;
value &= ~(APIC_SVR_VECTOR | APIC_SVR_FOCUS);
value |= (APIC_SVR_FEN | APIC_SVR_SWEN | APIC_SPURIOUS_INT);
lapic->svr = value;
}
int
lapic_id(void)
{