2009-11-16 22:41:44 +01:00
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/*
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* APIC handling routines. APIC is a requirement for SMP
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*/
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2010-04-02 00:22:33 +02:00
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#include "kernel/kernel.h"
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2010-09-07 09:18:11 +02:00
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#include <assert.h>
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2009-11-16 22:41:44 +01:00
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#include <unistd.h>
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#include <minix/portio.h>
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#include <minix/syslib.h>
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2010-09-07 09:18:11 +02:00
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#include <machine/cmos.h>
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2009-11-16 22:41:44 +01:00
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2010-04-02 00:22:33 +02:00
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#include "kernel/proc.h"
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#include "kernel/glo.h"
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2010-09-15 16:09:36 +02:00
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#include "arch_proto.h"
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2009-11-16 22:41:44 +01:00
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#include <minix/u64.h>
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#include "apic.h"
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#include "apic_asm.h"
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2010-04-02 00:22:33 +02:00
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#include "kernel/clock.h"
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2009-11-16 22:41:44 +01:00
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#include "glo.h"
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2010-09-07 09:18:11 +02:00
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#include "hw_intr.h"
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#include "acpi.h"
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2009-11-16 22:41:44 +01:00
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2010-01-16 21:53:55 +01:00
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#ifdef CONFIG_WATCHDOG
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2010-04-02 00:22:33 +02:00
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#include "kernel/watchdog.h"
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2010-01-16 21:53:55 +01:00
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#endif
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2009-11-16 22:41:44 +01:00
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2010-09-07 09:18:11 +02:00
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#define APIC_ENABLE 0x100
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#define APIC_FOCUS_DISABLED (1 << 9)
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#define APIC_SIV 0xFF
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#define APIC_TDCR_2 0x00
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#define APIC_TDCR_4 0x01
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#define APIC_TDCR_8 0x02
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#define APIC_TDCR_16 0x03
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#define APIC_TDCR_32 0x08
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#define APIC_TDCR_64 0x09
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#define APIC_TDCR_128 0x0a
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#define APIC_TDCR_1 0x0b
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#define IS_SET(mask) (mask)
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#define IS_CLEAR(mask) 0
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#define APIC_LVTT_VECTOR_MASK 0x000000FF
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#define APIC_LVTT_DS_PENDING (1 << 12)
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#define APIC_LVTT_MASK (1 << 16)
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#define APIC_LVTT_TM (1 << 17)
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#define APIC_LVT_IIPP_MASK 0x00002000
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#define APIC_LVT_IIPP_AH 0x00002000
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#define APIC_LVT_IIPP_AL 0x00000000
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#define APIC_LVT_TM_ONESHOT IS_CLEAR(APIC_LVTT_TM)
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#define APIC_LVT_TM_PERIODIC IS_SET(APIC_LVTT_TM)
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#define IOAPIC_REGSEL 0x0
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#define IOAPIC_RW 0x10
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#define APIC_ICR_DM_MASK 0x00000700
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#define APIC_ICR_VECTOR APIC_LVTT_VECTOR_MASK
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#define APIC_ICR_DM_FIXED (0 << 8)
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#define APIC_ICR_DM_LOWEST_PRIORITY (1 << 8)
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#define APIC_ICR_DM_SMI (2 << 8)
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#define APIC_ICR_DM_RESERVED (3 << 8)
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#define APIC_ICR_DM_NMI (4 << 8)
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#define APIC_ICR_DM_INIT (5 << 8)
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#define APIC_ICR_DM_STARTUP (6 << 8)
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#define APIC_ICR_DM_EXTINT (7 << 8)
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#define APIC_ICR_DM_PHYSICAL (0 << 11)
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#define APIC_ICR_DM_LOGICAL (1 << 11)
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#define APIC_ICR_DELIVERY_PENDING (1 << 12)
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#define APIC_ICR_INT_POLARITY (1 << 13)
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#define APIC_ICR_INTPOL_LOW IS_SET(APIC_ICR_INT_POLARITY)
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#define APIC_ICR_INTPOL_HIGH IS_CLEAR(APIC_ICR_INT_POLARITY)
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#define APIC_ICR_LEVEL_ASSERT (1 << 14)
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#define APIC_ICR_LEVEL_DEASSERT (0 << 14)
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#define APIC_ICR_TRIGGER (1 << 15)
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#define APIC_ICR_TM_LEVEL IS_CLEAR(APIC_ICR_TRIGGER)
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#define APIC_ICR_TM_EDGE IS_CLEAR(APIC_ICR_TRIGGER)
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#define APIC_ICR_INT_MASK (1 << 16)
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#define APIC_ICR_DEST_FIELD (0 << 18)
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#define APIC_ICR_DEST_SELF (1 << 18)
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#define APIC_ICR_DEST_ALL (2 << 18)
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#define APIC_ICR_DEST_ALL_BUT_SELF (3 << 18)
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2009-11-16 22:41:44 +01:00
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#define IA32_APIC_BASE 0x1b
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#define IA32_APIC_BASE_ENABLE_BIT 11
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2010-09-07 09:18:11 +02:00
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/* FIXME we should spread the irqs across as many priority levels as possible
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* due to buggy hw */
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#define LAPIC_VECTOR(irq) (IRQ0_VECTOR +(irq))
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#define IOAPIC_IRQ_STATE_MASKED 0x1
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2009-11-16 22:41:44 +01:00
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/* currently only 2 interrupt priority levels are used */
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#define SPL0 0x0
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#define SPLHI 0xF
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2010-09-07 09:18:11 +02:00
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PUBLIC struct io_apic io_apic[MAX_NR_IOAPICS];
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PUBLIC unsigned nioapics;
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struct irq;
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typedef void (* eoi_method_t)(struct irq *);
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struct irq {
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struct io_apic * ioa;
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unsigned pin;
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unsigned vector;
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eoi_method_t eoi;
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unsigned state;
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};
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PRIVATE struct irq io_apic_irq[NR_IRQ_VECTORS];
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2010-09-15 16:09:52 +02:00
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/*
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* to make APIC work if SMP is not configured, we need to set the maximal number
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* of CPUS to 1, cpuid to return 0 and the current cpu is always BSP
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*/
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2010-09-15 16:10:12 +02:00
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#ifdef CONFIG_SMP
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2010-09-15 16:09:52 +02:00
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#include "kernel/smp.h"
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#endif
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#include "kernel/spinlock.h"
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2010-09-07 09:18:11 +02:00
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2009-11-16 22:41:44 +01:00
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#define lapic_write_icr1(val) lapic_write(LAPIC_ICR1, val)
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#define lapic_write_icr2(val) lapic_write(LAPIC_ICR2, val)
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#define lapic_read_icr1(x) lapic_read(LAPIC_ICR1)
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#define lapic_read_icr2(x) lapic_read(LAPIC_ICR2)
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2010-09-15 16:09:52 +02:00
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#define is_boot_apic(apicid) ((apicid) == bsp_lapic_id)
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2009-11-16 22:41:44 +01:00
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#define VERBOSE_APIC(x) x
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2010-09-07 09:18:11 +02:00
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PUBLIC int ioapic_enabled;
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2009-11-16 22:41:44 +01:00
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PUBLIC u32_t lapic_addr_vaddr;
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2010-03-22 21:43:06 +01:00
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PUBLIC vir_bytes lapic_addr;
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2010-03-30 16:07:15 +02:00
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PUBLIC vir_bytes lapic_eoi_addr;
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2010-09-15 16:09:52 +02:00
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PUBLIC int bsp_lapic_id;
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2009-11-16 22:41:44 +01:00
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2010-09-07 09:18:11 +02:00
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PRIVATE volatile unsigned probe_ticks;
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2009-11-16 22:41:44 +01:00
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PRIVATE u64_t tsc0, tsc1;
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PRIVATE u32_t lapic_tctr0, lapic_tctr1;
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2010-04-22 09:49:40 +02:00
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PRIVATE unsigned apic_imcrp;
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PRIVATE const unsigned nlints = 0;
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2009-11-16 22:41:44 +01:00
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2010-09-15 16:10:57 +02:00
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PUBLIC void arch_eoi(void)
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{
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apic_eoi();
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}
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2010-09-07 09:18:11 +02:00
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2009-11-16 22:41:44 +01:00
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/*
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* FIXME this should be a cpulocal variable but there are some problems with
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* arch specific cpulocals. As this variable is write-once-read-only it is ok to
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* have at as an array until we resolve the cpulocals properly
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*/
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PRIVATE u32_t lapic_bus_freq[CONFIG_MAX_CPUS];
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/* the probe period will be roughly 100ms */
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#define PROBE_TICKS (system_hz / 10)
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2010-09-07 09:18:11 +02:00
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#define IOAPIC_IOREGSEL 0x0
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#define IOAPIC_IOWIN 0x10
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PUBLIC u32_t ioapic_read(u32_t ioa_base, u32_t reg)
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{
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*((u32_t *)(ioa_base + IOAPIC_IOREGSEL)) = (reg & 0xff);
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return *(u32_t *)(ioa_base + IOAPIC_IOWIN);
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}
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PRIVATE void ioapic_write(u32_t ioa_base, u8_t reg, u32_t val)
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{
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*((u32_t *)(ioa_base + IOAPIC_IOREGSEL)) = reg;
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*((u32_t *)(ioa_base + IOAPIC_IOWIN)) = val;
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}
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2010-09-15 16:09:52 +02:00
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_PROTOTYPE(void lapic_microsec_sleep, (unsigned count));
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_PROTOTYPE(void apic_idt_init, (const int reset));
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2010-09-07 09:18:11 +02:00
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PRIVATE void ioapic_enable_pin(vir_bytes ioapic_addr, int pin)
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{
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u32_t lo = ioapic_read(ioapic_addr, IOAPIC_REDIR_TABLE + pin * 2);
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lo &= ~APIC_ICR_INT_MASK;
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ioapic_write(ioapic_addr, IOAPIC_REDIR_TABLE + pin * 2, lo);
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}
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PRIVATE void ioapic_disable_pin(vir_bytes ioapic_addr, int pin)
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{
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u32_t lo = ioapic_read(ioapic_addr, IOAPIC_REDIR_TABLE + pin * 2);
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lo |= APIC_ICR_INT_MASK;
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ioapic_write(ioapic_addr, IOAPIC_REDIR_TABLE + pin * 2, lo);
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}
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PRIVATE void ioapic_redirt_entry_read(void * ioapic_addr,
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int entry,
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u32_t *hi,
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u32_t *lo)
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{
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*lo = ioapic_read((u32_t)ioapic_addr, (u8_t) (IOAPIC_REDIR_TABLE + entry * 2));
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*hi = ioapic_read((u32_t)ioapic_addr, (u8_t) (IOAPIC_REDIR_TABLE + entry * 2 + 1));
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}
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PRIVATE void ioapic_redirt_entry_write(void * ioapic_addr,
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int entry,
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u32_t hi,
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u32_t lo)
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{
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#if 0
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VERBOSE_APIC(printf("IO apic redir entry %3d "
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"write 0x%08x 0x%08x\n", entry, hi, lo));
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#endif
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ioapic_write((u32_t)ioapic_addr, (u8_t) (IOAPIC_REDIR_TABLE + entry * 2 + 1), hi);
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ioapic_write((u32_t)ioapic_addr, (u8_t) (IOAPIC_REDIR_TABLE + entry * 2), lo);
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}
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#define apic_read_tmr_vector(vec) \
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lapic_read(LAPIC_TMR + 0x10 * ((vec) >> 5))
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#define apic_read_irr_vector(vec) \
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lapic_read(LAPIC_IRR + 0x10 * ((vec) >> 5))
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#define apic_read_isr_vector(vec) \
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lapic_read(LAPIC_ISR + 0x10 * ((vec) >> 5))
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#define lapic_test_delivery_val(val, vector) ((val) & (1 << ((vector) & 0x1f)))
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PRIVATE void ioapic_eoi_level(struct irq * irq)
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{
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reg_t tmr;
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tmr = apic_read_tmr_vector(irq->vector);
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apic_eoi();
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/*
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* test if it was a level or edge triggered interrupt. If delivered as
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* edge exec the workaround for broken chipsets
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*/
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if (!lapic_test_delivery_val(tmr, irq->vector)) {
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int is_masked;
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u32_t lo;
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panic("EDGE instead of LEVEL!");
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lo = ioapic_read(irq->ioa->addr,
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IOAPIC_REDIR_TABLE + irq->pin * 2);
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is_masked = lo & APIC_ICR_INT_MASK;
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/* set mask and edge */
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lo |= APIC_ICR_INT_MASK;
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lo &= ~APIC_ICR_TRIGGER;
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ioapic_write(irq->ioa->addr,
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IOAPIC_REDIR_TABLE + irq->pin * 2, lo);
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/* set back to level and restore the mask bit */
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lo = ioapic_read(irq->ioa->addr,
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IOAPIC_REDIR_TABLE + irq->pin * 2);
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lo |= APIC_ICR_TRIGGER;
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if (is_masked)
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lo |= APIC_ICR_INT_MASK;
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else
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lo &= ~APIC_ICR_INT_MASK;
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ioapic_write(irq->ioa->addr,
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IOAPIC_REDIR_TABLE + irq->pin * 2, lo);
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}
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}
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PRIVATE void ioapic_eoi_edge(__unused struct irq * irq)
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{
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apic_eoi();
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}
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PUBLIC void ioapic_eoi(int irq)
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{
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if (ioapic_enabled) {
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io_apic_irq[irq].eoi(&io_apic_irq[irq]);
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}
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else
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irq_8259_eoi(irq);
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}
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2010-09-15 16:10:30 +02:00
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PUBLIC void ioapic_set_id(u32_t addr, unsigned int id)
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{
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ioapic_write(addr, IOAPIC_ID, id << 24);
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}
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2010-09-07 09:18:11 +02:00
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PUBLIC int ioapic_enable_all(void)
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{
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i8259_disable();
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if (apic_imcrp) {
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/* Select IMCR and disconnect 8259s. */
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outb(0x22, 0x70);
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outb(0x23, 0x01);
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}
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return ioapic_enabled = 1;
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}
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/* disables a single IO APIC */
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PRIVATE void ioapic_disable(struct io_apic * ioapic)
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{
|
|
|
|
unsigned p;
|
|
|
|
|
|
|
|
for (p = 0; p < io_apic->pins; p++) {
|
|
|
|
u32_t low_32, hi_32;
|
|
|
|
low_32 = ioapic_read((u32_t)ioapic->addr,
|
|
|
|
(uint8_t) (IOAPIC_REDIR_TABLE + p * 2));
|
|
|
|
hi_32 = ioapic_read((u32_t)ioapic->addr,
|
|
|
|
(uint8_t) (IOAPIC_REDIR_TABLE + p * 2 + 1));
|
|
|
|
|
|
|
|
if (!(low_32 & APIC_ICR_INT_MASK)) {
|
|
|
|
low_32 |= APIC_ICR_INT_MASK;
|
|
|
|
ioapic_write((u32_t)ioapic->addr,
|
|
|
|
(uint8_t) (IOAPIC_REDIR_TABLE + p * 2 + 1), hi_32);
|
|
|
|
ioapic_write((u32_t)ioapic->addr,
|
|
|
|
(uint8_t) (IOAPIC_REDIR_TABLE + p * 2), low_32);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* disables all IO APICs */
|
|
|
|
PUBLIC void ioapic_disable_all(void)
|
|
|
|
{
|
|
|
|
unsigned ioa;
|
|
|
|
if (!ioapic_enabled)
|
|
|
|
return;
|
|
|
|
|
|
|
|
for (ioa = 0 ; ioa < nioapics; ioa++)
|
|
|
|
ioapic_disable(&io_apic[ioa]);
|
|
|
|
|
|
|
|
ioapic_enabled = 0; /* io apic, disabled */
|
|
|
|
|
|
|
|
/* Enable 8259 - write 0x00 in OCW1 master and slave. */
|
|
|
|
if (apic_imcrp) {
|
|
|
|
outb(0x22, 0x70);
|
|
|
|
outb(0x23, 0x00);
|
|
|
|
}
|
|
|
|
|
|
|
|
lapic_microsec_sleep(200); /* to enable APIC to switch to PIC */
|
|
|
|
|
|
|
|
apic_idt_init(TRUE); /* reset */
|
|
|
|
idt_reload();
|
|
|
|
|
|
|
|
intr_init(INTS_ORIG, 0); /* no auto eoi */
|
|
|
|
}
|
|
|
|
|
|
|
|
PRIVATE void ioapic_disable_irq(unsigned irq)
|
|
|
|
{
|
|
|
|
assert(io_apic_irq[irq].ioa);
|
|
|
|
|
|
|
|
ioapic_disable_pin(io_apic_irq[irq].ioa->addr, io_apic_irq[irq].pin);
|
|
|
|
io_apic_irq[irq].state |= IOAPIC_IRQ_STATE_MASKED;
|
|
|
|
}
|
|
|
|
|
|
|
|
PRIVATE void ioapic_enable_irq(unsigned irq)
|
|
|
|
{
|
|
|
|
assert(io_apic_irq[irq].ioa);
|
|
|
|
|
|
|
|
ioapic_enable_pin(io_apic_irq[irq].ioa->addr, io_apic_irq[irq].pin);
|
|
|
|
io_apic_irq[irq].state &= ~IOAPIC_IRQ_STATE_MASKED;
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void ioapic_unmask_irq(unsigned irq)
|
|
|
|
{
|
|
|
|
if (ioapic_enabled)
|
|
|
|
ioapic_enable_irq(irq);
|
|
|
|
else
|
|
|
|
/* FIXME unlikely */
|
|
|
|
irq_8259_unmask(irq);
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void ioapic_mask_irq(unsigned irq)
|
|
|
|
{
|
|
|
|
if (ioapic_enabled)
|
|
|
|
ioapic_disable_irq(irq);
|
|
|
|
else
|
|
|
|
/* FIXME unlikely */
|
|
|
|
irq_8259_mask(irq);
|
|
|
|
}
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-15 16:10:30 +02:00
|
|
|
PUBLIC unsigned int apicid(void)
|
|
|
|
{
|
|
|
|
return lapic_read(LAPIC_ID);
|
2010-09-15 16:09:52 +02:00
|
|
|
}
|
|
|
|
|
2010-04-07 13:25:51 +02:00
|
|
|
PRIVATE int calib_clk_handler(irq_hook_t * UNUSED(hook))
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
u32_t tcrt;
|
|
|
|
u64_t tsc;
|
|
|
|
|
|
|
|
probe_ticks++;
|
2010-01-13 19:22:41 +01:00
|
|
|
read_tsc_64(&tsc);
|
2009-11-16 22:41:44 +01:00
|
|
|
tcrt = lapic_read(LAPIC_TIMER_CCR);
|
|
|
|
|
|
|
|
|
|
|
|
if (probe_ticks == 1) {
|
|
|
|
lapic_tctr0 = tcrt;
|
|
|
|
tsc0 = tsc;
|
|
|
|
}
|
|
|
|
else if (probe_ticks == PROBE_TICKS) {
|
|
|
|
lapic_tctr1 = tcrt;
|
|
|
|
tsc1 = tsc;
|
2010-09-07 09:18:11 +02:00
|
|
|
stop_8253A_timer();
|
2009-11-16 22:41:44 +01:00
|
|
|
}
|
|
|
|
|
2010-09-15 16:10:03 +02:00
|
|
|
BKL_UNLOCK();
|
2009-11-16 22:41:44 +01:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
PRIVATE void apic_calibrate_clocks(unsigned cpu)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
u32_t lvtt, val, lapic_delta;
|
|
|
|
u64_t tsc_delta;
|
2010-05-25 10:06:14 +02:00
|
|
|
u64_t cpu_freq;
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
irq_hook_t calib_clk;
|
|
|
|
|
2010-03-03 16:45:01 +01:00
|
|
|
BOOT_VERBOSE(printf("Calibrating clock\n"));
|
2009-11-16 22:41:44 +01:00
|
|
|
/*
|
|
|
|
* Set Initial count register to the highest value so it does not
|
|
|
|
* underflow during the testing period
|
|
|
|
* */
|
|
|
|
val = 0xffffffff;
|
|
|
|
lapic_write (LAPIC_TIMER_ICR, val);
|
|
|
|
|
|
|
|
/* Set Current count register */
|
|
|
|
val = 0;
|
|
|
|
lapic_write (LAPIC_TIMER_CCR, val);
|
|
|
|
|
|
|
|
lvtt = lapic_read(LAPIC_TIMER_DCR) & ~0x0b;
|
|
|
|
/* Set Divide configuration register to 1 */
|
|
|
|
lvtt = APIC_TDCR_1;
|
|
|
|
lapic_write(LAPIC_TIMER_DCR, lvtt);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* mask the APIC timer interrupt in the LVT Timer Register so that we
|
|
|
|
* don't get an interrupt upon underflow which we don't know how to
|
|
|
|
* handle right know. If underflow happens, the system will not continue
|
|
|
|
* as something is wrong with the clock IRQ 0 and we cannot calibrate
|
|
|
|
* the clock which mean that we cannot run processes
|
|
|
|
*/
|
|
|
|
lvtt = lapic_read (LAPIC_LVTTR);
|
|
|
|
lvtt |= APIC_LVTT_MASK;
|
|
|
|
lapic_write (LAPIC_LVTTR, lvtt);
|
|
|
|
|
|
|
|
/* set the probe, we use the legacy timer, IRQ 0 */
|
|
|
|
put_irq_handler(&calib_clk, CLOCK_IRQ, calib_clk_handler);
|
|
|
|
|
|
|
|
/* set the PIC timer to get some time */
|
|
|
|
init_8253A_timer(system_hz);
|
2010-09-15 16:10:03 +02:00
|
|
|
|
|
|
|
/*
|
|
|
|
* We must unlock BKL here as the in-kernel interrupt will lock it
|
|
|
|
* again. The handler will unlock it after it is done. This is
|
|
|
|
* absolutely safe as only the BSP is running. It is just a workaround a
|
|
|
|
* corner case for APIC timer calibration
|
|
|
|
*/
|
|
|
|
BKL_UNLOCK();
|
2010-09-07 09:18:11 +02:00
|
|
|
intr_enable();
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
/* loop for some time to get a sample */
|
2010-03-23 14:35:01 +01:00
|
|
|
while(probe_ticks < PROBE_TICKS) {
|
|
|
|
intr_enable();
|
|
|
|
}
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
intr_disable();
|
2010-09-15 16:10:09 +02:00
|
|
|
BKL_LOCK();
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
/* remove the probe */
|
|
|
|
rm_irq_handler(&calib_clk);
|
|
|
|
|
|
|
|
lapic_delta = lapic_tctr0 - lapic_tctr1;
|
|
|
|
tsc_delta = sub64(tsc1, tsc0);
|
|
|
|
|
2010-01-16 21:53:55 +01:00
|
|
|
lapic_bus_freq[cpuid] = system_hz * lapic_delta / (PROBE_TICKS - 1);
|
2010-03-03 16:45:01 +01:00
|
|
|
BOOT_VERBOSE(printf("APIC bus freq %lu MHz\n",
|
2010-01-16 21:53:55 +01:00
|
|
|
lapic_bus_freq[cpuid] / 1000000));
|
2010-05-25 10:06:14 +02:00
|
|
|
cpu_freq = mul64(div64u64(tsc_delta, PROBE_TICKS - 1), make64(system_hz, 0));
|
2010-01-16 21:53:55 +01:00
|
|
|
cpu_set_freq(cpuid, cpu_freq);
|
2010-05-25 10:06:14 +02:00
|
|
|
BOOT_VERBOSE(cpu_print_freq(cpuid));
|
2009-11-16 22:41:44 +01:00
|
|
|
}
|
|
|
|
|
2010-09-15 16:11:06 +02:00
|
|
|
PUBLIC void lapic_set_timer_one_shot(const u32_t usec)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
/* sleep in micro seconds */
|
|
|
|
u32_t lvtt;
|
|
|
|
u32_t ticks_per_us;
|
2010-03-27 15:31:00 +01:00
|
|
|
const u8_t cpu = cpuid;
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-16 09:18:47 +02:00
|
|
|
ticks_per_us = (lapic_bus_freq[cpu] / 1000000) * config_apic_timer_x;
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
lvtt = APIC_TDCR_1;
|
|
|
|
lapic_write(LAPIC_TIMER_DCR, lvtt);
|
|
|
|
|
|
|
|
/* configure timer as one-shot */
|
|
|
|
lvtt = APIC_TIMER_INT_VECTOR;
|
|
|
|
lapic_write(LAPIC_LVTTR, lvtt);
|
|
|
|
|
2010-09-15 16:11:06 +02:00
|
|
|
lapic_write(LAPIC_TIMER_ICR, usec * ticks_per_us);
|
2009-11-16 22:41:44 +01:00
|
|
|
}
|
|
|
|
|
2010-03-27 15:31:00 +01:00
|
|
|
PUBLIC void lapic_set_timer_periodic(const unsigned freq)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
/* sleep in micro seconds */
|
|
|
|
u32_t lvtt;
|
|
|
|
u32_t lapic_ticks_per_clock_tick;
|
2010-03-27 15:31:00 +01:00
|
|
|
const u8_t cpu = cpuid;
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-16 09:18:47 +02:00
|
|
|
lapic_ticks_per_clock_tick = (lapic_bus_freq[cpu] / freq) * config_apic_timer_x;
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
lvtt = APIC_TDCR_1;
|
|
|
|
lapic_write(LAPIC_TIMER_DCR, lvtt);
|
|
|
|
|
|
|
|
/* configure timer as periodic */
|
2010-01-16 21:53:55 +01:00
|
|
|
lvtt = APIC_LVTT_TM | APIC_TIMER_INT_VECTOR;
|
2009-11-16 22:41:44 +01:00
|
|
|
lapic_write(LAPIC_LVTTR, lvtt);
|
|
|
|
|
|
|
|
lapic_write(LAPIC_TIMER_ICR, lapic_ticks_per_clock_tick);
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void lapic_stop_timer(void)
|
|
|
|
{
|
|
|
|
u32_t lvtt;
|
2010-01-13 15:44:19 +01:00
|
|
|
lvtt = lapic_read(LAPIC_LVTTR);
|
2009-11-16 22:41:44 +01:00
|
|
|
lapic_write(LAPIC_LVTTR, lvtt | APIC_LVTT_MASK);
|
2010-09-15 16:11:06 +02:00
|
|
|
/* zero the current counter so it can be restarted again */
|
|
|
|
lapic_write(LAPIC_TIMER_ICR, 0);
|
|
|
|
lapic_write(LAPIC_TIMER_CCR, 0);
|
2009-11-16 22:41:44 +01:00
|
|
|
}
|
|
|
|
|
2010-09-15 16:10:57 +02:00
|
|
|
PUBLIC void lapic_restart_timer(void)
|
|
|
|
{
|
2010-09-15 16:11:06 +02:00
|
|
|
/* restart the timer only if the counter reached zero, i.e. expired */
|
|
|
|
if (lapic_read(LAPIC_TIMER_CCR) == 0)
|
|
|
|
lapic_set_timer_one_shot(1000000/system_hz);
|
2010-09-15 16:10:57 +02:00
|
|
|
}
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
PUBLIC void lapic_microsec_sleep(unsigned count)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
lapic_set_timer_one_shot(count);
|
2010-09-15 16:09:52 +02:00
|
|
|
while (lapic_read(LAPIC_TIMER_CCR))
|
|
|
|
arch_pause();
|
2009-11-16 22:41:44 +01:00
|
|
|
}
|
|
|
|
|
2010-04-22 09:49:40 +02:00
|
|
|
PRIVATE u32_t lapic_errstatus(void)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
lapic_write(LAPIC_ESR, 0);
|
|
|
|
return lapic_read(LAPIC_ESR);
|
|
|
|
}
|
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
PRIVATE int lapic_disable_in_msr(void)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
2010-09-07 09:18:11 +02:00
|
|
|
u64_t msr;
|
|
|
|
u32_t addr;
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
ia32_msr_read(IA32_APIC_BASE, &msr.hi, &msr.lo);
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
msr.lo &= ~(1 << IA32_APIC_BASE_ENABLE_BIT);
|
|
|
|
ia32_msr_write(IA32_APIC_BASE, msr.hi, msr.lo);
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
return 1;
|
|
|
|
}
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
PUBLIC void lapic_disable(void)
|
|
|
|
{
|
|
|
|
/* Disable current APIC and close interrupts from PIC */
|
|
|
|
u32_t val;
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
if (!lapic_addr)
|
|
|
|
return;
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
if (cpu_is_bsp(cpuid) && !apic_imcrp)
|
|
|
|
#endif
|
|
|
|
{
|
2010-09-07 09:18:11 +02:00
|
|
|
/* leave it enabled if imcr is not set */
|
|
|
|
val = lapic_read(LAPIC_LINT0);
|
|
|
|
val &= ~(APIC_ICR_DM_MASK|APIC_ICR_INT_MASK);
|
|
|
|
val |= APIC_ICR_DM_EXTINT; /* ExtINT at LINT0 */
|
|
|
|
lapic_write (LAPIC_LINT0, val);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
val = lapic_read(LAPIC_LINT0) & 0xFFFE58FF;
|
|
|
|
val |= APIC_ICR_INT_MASK;
|
|
|
|
lapic_write (LAPIC_LINT0, val);
|
|
|
|
|
|
|
|
val = lapic_read(LAPIC_LINT1) & 0xFFFE58FF;
|
|
|
|
val |= APIC_ICR_INT_MASK;
|
2009-11-16 22:41:44 +01:00
|
|
|
lapic_write (LAPIC_LINT1, val);
|
2010-09-07 09:18:11 +02:00
|
|
|
|
|
|
|
val = lapic_read(LAPIC_SIVR) & 0xFFFFFF00;
|
|
|
|
val &= ~APIC_ENABLE;
|
|
|
|
lapic_write(LAPIC_SIVR, val);
|
|
|
|
|
|
|
|
lapic_disable_in_msr();
|
2009-11-16 22:41:44 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
PRIVATE int lapic_enable_in_msr(void)
|
|
|
|
{
|
|
|
|
u64_t msr;
|
|
|
|
u32_t addr;
|
|
|
|
|
|
|
|
ia32_msr_read(IA32_APIC_BASE, &msr.hi, &msr.lo);
|
|
|
|
|
2010-09-15 16:10:09 +02:00
|
|
|
#if 0
|
|
|
|
/*FIXME this is a problem on AP */
|
2009-11-16 22:41:44 +01:00
|
|
|
/*
|
|
|
|
* FIXME if the location is different (unlikely) then the one we expect,
|
|
|
|
* update it
|
|
|
|
*/
|
|
|
|
addr = (msr.lo >> 12) | ((msr.hi & 0xf) << 20);
|
|
|
|
if (phys2vir(addr) != (lapic_addr >> 12)) {
|
|
|
|
if (msr.hi & 0xf) {
|
2010-03-03 16:45:01 +01:00
|
|
|
printf("ERROR : APIC address needs more then 32 bits\n");
|
2009-11-16 22:41:44 +01:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
lapic_addr = phys2vir(msr.lo & ~((1 << 12) - 1));
|
|
|
|
}
|
2010-09-15 16:10:09 +02:00
|
|
|
#endif
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
msr.lo |= (1 << IA32_APIC_BASE_ENABLE_BIT);
|
|
|
|
ia32_msr_write(IA32_APIC_BASE, msr.hi, msr.lo);
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
PUBLIC int lapic_enable(unsigned cpu)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
u32_t val, nlvt;
|
|
|
|
|
|
|
|
if (!lapic_addr)
|
|
|
|
return 0;
|
|
|
|
|
2010-01-13 19:22:41 +01:00
|
|
|
cpu_has_tsc = _cpufeature(_CPUF_I386_TSC);
|
|
|
|
if (!cpu_has_tsc) {
|
2010-03-03 16:45:01 +01:00
|
|
|
printf("CPU lacks timestamp counter, "
|
2010-01-13 19:22:41 +01:00
|
|
|
"cannot calibrate LAPIC timer\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
if (!lapic_enable_in_msr())
|
|
|
|
return 0;
|
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
/* set the highest priority for ever */
|
|
|
|
lapic_write(LAPIC_TPR, 0x0);
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
lapic_eoi_addr = LAPIC_EOI;
|
|
|
|
/* clear error state register. */
|
|
|
|
val = lapic_errstatus ();
|
|
|
|
|
|
|
|
/* Enable Local APIC and set the spurious vector to 0xff. */
|
2010-09-07 09:18:11 +02:00
|
|
|
val = lapic_read(LAPIC_SIVR);
|
2010-01-16 21:53:55 +01:00
|
|
|
val |= APIC_ENABLE | APIC_SPURIOUS_INT_VECTOR;
|
|
|
|
val &= ~APIC_FOCUS_DISABLED;
|
2009-11-16 22:41:44 +01:00
|
|
|
lapic_write(LAPIC_SIVR, val);
|
2010-07-06 13:59:19 +02:00
|
|
|
(void) lapic_read(LAPIC_SIVR);
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
apic_eoi();
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
/* Program Logical Destination Register. */
|
|
|
|
val = lapic_read(LAPIC_LDR) & ~0xFF000000;
|
|
|
|
val |= (cpu & 0xFF) << 24;
|
|
|
|
lapic_write(LAPIC_LDR, val);
|
|
|
|
|
|
|
|
/* Program Destination Format Register for Flat mode. */
|
|
|
|
val = lapic_read(LAPIC_DFR) | 0xF0000000;
|
|
|
|
lapic_write (LAPIC_DFR, val);
|
|
|
|
|
|
|
|
val = lapic_read (LAPIC_LVTER) & 0xFFFFFF00;
|
|
|
|
lapic_write (LAPIC_LVTER, val);
|
|
|
|
|
|
|
|
nlvt = (lapic_read(LAPIC_VERSION)>>16) & 0xFF;
|
|
|
|
|
|
|
|
if(nlvt >= 4) {
|
|
|
|
val = lapic_read(LAPIC_LVTTMR);
|
|
|
|
lapic_write(LAPIC_LVTTMR, val | APIC_ICR_INT_MASK);
|
|
|
|
}
|
|
|
|
|
|
|
|
if(nlvt >= 5) {
|
|
|
|
val = lapic_read(LAPIC_LVTPCR);
|
|
|
|
lapic_write(LAPIC_LVTPCR, val | APIC_ICR_INT_MASK);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* setup TPR to allow all interrupts. */
|
|
|
|
val = lapic_read (LAPIC_TPR);
|
|
|
|
/* accept all interrupts */
|
|
|
|
lapic_write (LAPIC_TPR, val & ~0xFF);
|
|
|
|
|
2010-07-06 13:59:19 +02:00
|
|
|
(void) lapic_read (LAPIC_SIVR);
|
2010-09-07 09:18:11 +02:00
|
|
|
apic_eoi();
|
2009-11-16 22:41:44 +01:00
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
apic_calibrate_clocks(cpu);
|
2010-03-03 16:45:01 +01:00
|
|
|
BOOT_VERBOSE(printf("APIC timer calibrated\n"));
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
PRIVATE void apic_spurios_intr(void)
|
|
|
|
{
|
2010-03-03 16:45:01 +01:00
|
|
|
printf("WARNING spurious interrupt\n");
|
2009-11-16 22:41:44 +01:00
|
|
|
for(;;);
|
|
|
|
}
|
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
PRIVATE void apic_error_intr(void)
|
|
|
|
{
|
|
|
|
printf("WARNING local apic error interrupt\n");
|
|
|
|
for(;;);
|
|
|
|
}
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
PRIVATE struct gate_table_s gate_table_ioapic[] = {
|
2010-09-07 09:18:11 +02:00
|
|
|
{ apic_hwint0, LAPIC_VECTOR( 0), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint1, LAPIC_VECTOR( 1), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint2, LAPIC_VECTOR( 2), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint3, LAPIC_VECTOR( 3), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint4, LAPIC_VECTOR( 4), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint5, LAPIC_VECTOR( 5), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint6, LAPIC_VECTOR( 6), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint7, LAPIC_VECTOR( 7), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint8, LAPIC_VECTOR( 8), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint9, LAPIC_VECTOR( 9), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint10, LAPIC_VECTOR(10), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint11, LAPIC_VECTOR(11), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint12, LAPIC_VECTOR(12), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint13, LAPIC_VECTOR(13), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint14, LAPIC_VECTOR(14), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint15, LAPIC_VECTOR(15), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint16, LAPIC_VECTOR(16), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint17, LAPIC_VECTOR(17), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint18, LAPIC_VECTOR(18), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint19, LAPIC_VECTOR(19), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint20, LAPIC_VECTOR(20), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint21, LAPIC_VECTOR(21), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint22, LAPIC_VECTOR(22), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint23, LAPIC_VECTOR(23), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint24, LAPIC_VECTOR(24), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint25, LAPIC_VECTOR(25), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint26, LAPIC_VECTOR(26), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint27, LAPIC_VECTOR(27), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint28, LAPIC_VECTOR(28), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint29, LAPIC_VECTOR(29), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint30, LAPIC_VECTOR(30), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint31, LAPIC_VECTOR(31), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint32, LAPIC_VECTOR(32), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint33, LAPIC_VECTOR(33), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint34, LAPIC_VECTOR(34), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint35, LAPIC_VECTOR(35), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint36, LAPIC_VECTOR(36), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint37, LAPIC_VECTOR(37), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint38, LAPIC_VECTOR(38), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint39, LAPIC_VECTOR(39), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint40, LAPIC_VECTOR(40), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint41, LAPIC_VECTOR(41), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint42, LAPIC_VECTOR(42), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint43, LAPIC_VECTOR(43), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint44, LAPIC_VECTOR(44), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint45, LAPIC_VECTOR(45), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint46, LAPIC_VECTOR(46), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint47, LAPIC_VECTOR(47), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint48, LAPIC_VECTOR(48), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint49, LAPIC_VECTOR(49), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint50, LAPIC_VECTOR(50), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint51, LAPIC_VECTOR(51), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint52, LAPIC_VECTOR(52), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint53, LAPIC_VECTOR(53), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint54, LAPIC_VECTOR(54), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint55, LAPIC_VECTOR(55), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint56, LAPIC_VECTOR(56), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint57, LAPIC_VECTOR(57), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint58, LAPIC_VECTOR(58), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint59, LAPIC_VECTOR(59), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint60, LAPIC_VECTOR(60), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint61, LAPIC_VECTOR(61), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint62, LAPIC_VECTOR(62), INTR_PRIVILEGE },
|
|
|
|
{ apic_hwint63, LAPIC_VECTOR(63), INTR_PRIVILEGE },
|
2009-11-16 22:41:44 +01:00
|
|
|
{ apic_spurios_intr, APIC_SPURIOUS_INT_VECTOR, INTR_PRIVILEGE },
|
2010-09-07 09:18:11 +02:00
|
|
|
{ apic_error_intr, APIC_ERROR_INT_VECTOR, INTR_PRIVILEGE },
|
2009-11-16 22:41:44 +01:00
|
|
|
{ NULL, 0, 0}
|
|
|
|
};
|
|
|
|
|
|
|
|
PRIVATE struct gate_table_s gate_table_common[] = {
|
2010-02-09 16:20:09 +01:00
|
|
|
{ ipc_entry, IPC_VECTOR, USER_PRIVILEGE },
|
|
|
|
{ kernel_call_entry, KERN_CALL_VECTOR, USER_PRIVILEGE },
|
2009-11-16 22:41:44 +01:00
|
|
|
{ NULL, 0, 0}
|
|
|
|
};
|
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
PRIVATE struct gate_table_s gate_table_smp[] = {
|
2010-09-15 16:10:30 +02:00
|
|
|
{ apic_ipi_sched_intr, APIC_SMP_SCHED_PROC_VECTOR, INTR_PRIVILEGE },
|
|
|
|
{ apic_ipi_halt_intr, APIC_SMP_CPU_HALT_VECTOR, INTR_PRIVILEGE },
|
2010-09-07 09:18:11 +02:00
|
|
|
{ NULL, 0, 0}
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
#ifdef CONFIG_APIC_DEBUG
|
2010-01-06 09:23:14 +01:00
|
|
|
PRIVATE void lapic_set_dummy_handlers(void)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
|
|
|
char * handler;
|
2010-09-07 09:18:11 +02:00
|
|
|
int vect = 32; /* skip the reserved vectors */
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
handler = &lapic_intr_dummy_handles_start;
|
|
|
|
handler += vect * LAPIC_INTR_DUMMY_HANDLER_SIZE;
|
|
|
|
for(; handler < &lapic_intr_dummy_handles_end;
|
|
|
|
handler += LAPIC_INTR_DUMMY_HANDLER_SIZE) {
|
|
|
|
int_gate(vect++, (vir_bytes) handler,
|
|
|
|
PRESENT | INT_GATE_TYPE |
|
|
|
|
(INTR_PRIVILEGE << DPL_SHIFT));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Build descriptors for interrupt gates in IDT. */
|
2010-09-15 16:09:52 +02:00
|
|
|
PUBLIC void apic_idt_init(const int reset)
|
2009-11-16 22:41:44 +01:00
|
|
|
{
|
2010-09-07 09:18:11 +02:00
|
|
|
u32_t val;
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
/* Set up idt tables for smp mode.
|
|
|
|
*/
|
2010-09-15 16:09:52 +02:00
|
|
|
int is_bsp = is_boot_apic(apicid());
|
2009-11-16 22:41:44 +01:00
|
|
|
|
|
|
|
if (reset) {
|
|
|
|
idt_copy_vectors(gate_table_pic);
|
|
|
|
idt_copy_vectors(gate_table_common);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_APIC_DEBUG
|
2010-09-15 16:10:07 +02:00
|
|
|
if (is_bsp)
|
2010-03-03 16:45:01 +01:00
|
|
|
printf("APIC debugging is enabled\n");
|
2009-11-16 22:41:44 +01:00
|
|
|
lapic_set_dummy_handlers();
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Build descriptors for interrupt gates in IDT. */
|
|
|
|
if (ioapic_enabled)
|
|
|
|
idt_copy_vectors(gate_table_ioapic);
|
|
|
|
else
|
|
|
|
idt_copy_vectors(gate_table_pic);
|
|
|
|
|
|
|
|
idt_copy_vectors(gate_table_common);
|
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
idt_copy_vectors(gate_table_smp);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Setup error interrupt vector */
|
|
|
|
val = lapic_read(LAPIC_LVTER);
|
|
|
|
val |= APIC_ERROR_INT_VECTOR;
|
|
|
|
val &= ~ APIC_ICR_INT_MASK;
|
|
|
|
lapic_write(LAPIC_LVTER, val);
|
|
|
|
(void) lapic_read(LAPIC_LVTER);
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
/* configure the timer interupt handler */
|
2010-09-15 16:09:52 +02:00
|
|
|
if (is_bsp) {
|
2010-09-15 16:10:09 +02:00
|
|
|
BOOT_VERBOSE(printf("Initiating APIC timer handler\n"));
|
|
|
|
/* register the timer interrupt handler for this CPU */
|
|
|
|
int_gate(APIC_TIMER_INT_VECTOR, (vir_bytes) lapic_timer_int_handler,
|
|
|
|
PRESENT | INT_GATE_TYPE | (INTR_PRIVILEGE << DPL_SHIFT));
|
2009-11-16 22:41:44 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
PRIVATE int acpi_get_ioapics(struct io_apic * ioa, unsigned * nioa, unsigned max)
|
|
|
|
{
|
|
|
|
unsigned n = 0;
|
|
|
|
struct acpi_madt_ioapic * acpi_ioa;
|
|
|
|
|
|
|
|
while (n < max) {
|
|
|
|
acpi_ioa = acpi_get_ioapic_next();
|
|
|
|
if (acpi_ioa == NULL)
|
|
|
|
break;
|
|
|
|
|
|
|
|
ioa[n].id = acpi_ioa->id;
|
|
|
|
ioa[n].addr = phys2vir(acpi_ioa->address);
|
|
|
|
ioa[n].paddr = (phys_bytes) acpi_ioa->address;
|
|
|
|
ioa[n].gsi_base = acpi_ioa->global_int_base;
|
|
|
|
ioa[n].pins = ((ioapic_read(ioa[n].addr,
|
|
|
|
IOAPIC_VERSION) & 0xff0000) >> 16)+1;
|
|
|
|
printf("IO APIC %d addr 0x%x paddr 0x%x pins %d\n",
|
|
|
|
acpi_ioa->id, ioa[n].addr, ioa[n].paddr,
|
|
|
|
ioa[n].pins);
|
|
|
|
|
|
|
|
n++;
|
|
|
|
}
|
|
|
|
|
|
|
|
*nioa = n;
|
|
|
|
return n;
|
|
|
|
}
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
PUBLIC int detect_ioapics(void)
|
2010-09-07 09:18:11 +02:00
|
|
|
{
|
|
|
|
int status;
|
|
|
|
|
|
|
|
if (machine.acpi_rsdp)
|
|
|
|
status = acpi_get_ioapics(io_apic, &nioapics, MAX_NR_IOAPICS);
|
|
|
|
if (!status) {
|
|
|
|
/* try something different like MPS */
|
|
|
|
}
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
|
2010-09-15 16:10:30 +02:00
|
|
|
PUBLIC void apic_send_ipi(unsigned vector, unsigned cpu, int type)
|
|
|
|
{
|
|
|
|
u32_t icr1, icr2;
|
|
|
|
|
|
|
|
if (ncpus == 1)
|
|
|
|
/* no need of sending an IPI */
|
|
|
|
return;
|
|
|
|
|
|
|
|
while (lapic_read_icr1() & APIC_ICR_DELIVERY_PENDING)
|
|
|
|
arch_pause();
|
|
|
|
|
|
|
|
icr1 = lapic_read_icr1() & 0xFFF0F800;
|
|
|
|
icr2 = lapic_read_icr2() & 0xFFFFFF;
|
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
case APIC_IPI_DEST:
|
|
|
|
if (!cpu_is_ready(cpu))
|
|
|
|
return;
|
|
|
|
lapic_write_icr2(icr2 | (cpuid2apicid[cpu] << 24));
|
|
|
|
lapic_write_icr1(icr1 | APIC_ICR_DEST_FIELD | vector);
|
|
|
|
break;
|
|
|
|
case APIC_IPI_SELF:
|
|
|
|
lapic_write_icr2(icr2);
|
|
|
|
lapic_write_icr1(icr1 | APIC_ICR_DEST_SELF | vector);
|
|
|
|
break;
|
|
|
|
case APIC_IPI_TO_ALL_BUT_SELF:
|
|
|
|
lapic_write_icr2(icr2);
|
|
|
|
lapic_write_icr1(icr1 | APIC_ICR_DEST_ALL_BUT_SELF | vector);
|
|
|
|
break;
|
|
|
|
case APIC_IPI_TO_ALL:
|
|
|
|
lapic_write_icr2(icr2);
|
|
|
|
lapic_write_icr1(icr1 | APIC_ICR_DEST_ALL | vector);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
printf("WARNING : unknown send ipi type request\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
PUBLIC int apic_send_startup_ipi(unsigned cpu, phys_bytes trampoline)
|
|
|
|
{
|
|
|
|
int timeout;
|
|
|
|
u32_t errstatus = 0;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* INIT-SIPI-SIPI sequence */
|
|
|
|
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
|
|
u32_t val;
|
2010-09-15 16:10:30 +02:00
|
|
|
|
|
|
|
/* clear err status */
|
2010-09-15 16:09:52 +02:00
|
|
|
lapic_errstatus();
|
|
|
|
|
|
|
|
/* set target pe */
|
|
|
|
val = lapic_read(LAPIC_ICR2) & 0xFFFFFF;
|
|
|
|
val |= cpuid2apicid[cpu] << 24;
|
|
|
|
lapic_write(LAPIC_ICR2, val);
|
|
|
|
|
|
|
|
/* send SIPI */
|
|
|
|
val = lapic_read(LAPIC_ICR1) & 0xFFF32000;
|
|
|
|
val |= APIC_ICR_LEVEL_ASSERT |APIC_ICR_DM_STARTUP;
|
|
|
|
val |= (((u32_t)trampoline >> 12)&0xff);
|
|
|
|
lapic_write(LAPIC_ICR1, val);
|
|
|
|
|
|
|
|
timeout = 1000;
|
|
|
|
|
|
|
|
/* wait for 200 micro-seconds*/
|
|
|
|
lapic_microsec_sleep (200);
|
|
|
|
errstatus = 0;
|
|
|
|
|
2010-09-15 16:10:30 +02:00
|
|
|
while ((lapic_read(LAPIC_ICR1) & APIC_ICR_DELIVERY_PENDING) &&
|
|
|
|
!errstatus) {
|
2010-09-15 16:09:52 +02:00
|
|
|
errstatus = lapic_errstatus();
|
|
|
|
timeout--;
|
|
|
|
if (!timeout) break;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* skip this one and continue with another cpu */
|
|
|
|
if (errstatus)
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC int apic_send_init_ipi(unsigned cpu, phys_bytes trampoline)
|
|
|
|
{
|
|
|
|
u32_t ptr, errstatus = 0;
|
|
|
|
int timeout;
|
|
|
|
|
|
|
|
/* set the warm reset vector */
|
|
|
|
ptr = (u32_t)(trampoline & 0xF);
|
|
|
|
phys_copy(0x467, vir2phys(&ptr), sizeof(u16_t ));
|
|
|
|
ptr = (u32_t)(trampoline >> 4);
|
|
|
|
phys_copy(0x469, vir2phys(&ptr), sizeof(u16_t ));
|
|
|
|
|
|
|
|
/* set shutdown code */
|
|
|
|
outb (RTC_INDEX, 0xF);
|
|
|
|
outb (RTC_IO, 0xA);
|
|
|
|
|
|
|
|
/* clear error state register. */
|
|
|
|
(void) lapic_errstatus();
|
|
|
|
|
|
|
|
/* assert INIT IPI , No Shorthand, destination mode : physical */
|
|
|
|
lapic_write(LAPIC_ICR2, (lapic_read (LAPIC_ICR2) & 0xFFFFFF) |
|
|
|
|
(cpuid2apicid[cpu] << 24));
|
|
|
|
lapic_write(LAPIC_ICR1, (lapic_read (LAPIC_ICR1) & 0xFFF32000) |
|
|
|
|
APIC_ICR_DM_INIT | APIC_ICR_TM_LEVEL | APIC_ICR_LEVEL_ASSERT);
|
|
|
|
|
|
|
|
timeout = 1000;
|
|
|
|
|
|
|
|
/* sleep for 200 micro-seconds */
|
|
|
|
lapic_microsec_sleep(200);
|
|
|
|
|
|
|
|
errstatus = 0;
|
|
|
|
|
|
|
|
while ((lapic_read(LAPIC_ICR1) & APIC_ICR_DELIVERY_PENDING) && !errstatus) {
|
|
|
|
errstatus = lapic_errstatus();
|
|
|
|
timeout--;
|
|
|
|
if (!timeout) break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (errstatus)
|
|
|
|
return -1; /* to continue with a new processor */
|
|
|
|
|
|
|
|
/* clear error state register. */
|
|
|
|
lapic_errstatus();
|
|
|
|
|
|
|
|
/* deassert INIT IPI , No Shorthand, destination mode : physical */
|
|
|
|
lapic_write(LAPIC_ICR2, (lapic_read (LAPIC_ICR2) & 0xFFFFFF) |
|
|
|
|
(cpuid2apicid[cpu] << 24));
|
|
|
|
lapic_write(LAPIC_ICR1, (lapic_read (LAPIC_ICR1) & 0xFFF32000) |
|
|
|
|
APIC_ICR_DEST_ALL | APIC_ICR_TM_LEVEL | APIC_ICR_DM_INIT);
|
|
|
|
|
|
|
|
timeout = 1000;
|
|
|
|
errstatus = 0;
|
|
|
|
|
|
|
|
/* sleep for 200 micro-seconds */
|
|
|
|
lapic_microsec_sleep(200);
|
|
|
|
|
|
|
|
while ((lapic_read(LAPIC_ICR1)&APIC_ICR_DELIVERY_PENDING) && !errstatus) {
|
|
|
|
errstatus = lapic_errstatus();
|
|
|
|
timeout--;
|
|
|
|
if(!timeout) break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (errstatus)
|
|
|
|
return -1; /* with the new processor */
|
|
|
|
|
|
|
|
/* clear error state register. */
|
|
|
|
(void) lapic_errstatus();
|
|
|
|
|
|
|
|
/* wait 10ms */
|
|
|
|
lapic_microsec_sleep (10000);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifndef CONFIG_SMP
|
2009-11-16 22:41:44 +01:00
|
|
|
PUBLIC int apic_single_cpu_init(void)
|
|
|
|
{
|
|
|
|
if (!cpu_feature_apic_on_chip())
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
lapic_addr = phys2vir(LOCAL_APIC_DEF_ADDR);
|
|
|
|
ioapic_enabled = 0;
|
|
|
|
|
2010-09-15 16:09:52 +02:00
|
|
|
if (!lapic_enable(0)) {
|
2009-11-16 22:41:44 +01:00
|
|
|
lapic_addr = 0x0;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2010-09-07 09:18:11 +02:00
|
|
|
acpi_init();
|
|
|
|
|
|
|
|
if (!detect_ioapics()) {
|
|
|
|
lapic_disable();
|
|
|
|
lapic_addr = 0x0;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
ioapic_enable_all();
|
|
|
|
|
|
|
|
if (ioapic_enabled)
|
|
|
|
machine.apic_enabled = 1;
|
|
|
|
|
2009-11-16 22:41:44 +01:00
|
|
|
apic_idt_init(0); /* Not a reset ! */
|
|
|
|
idt_reload();
|
|
|
|
return 1;
|
|
|
|
}
|
2010-09-15 16:09:52 +02:00
|
|
|
#endif
|
2010-09-07 09:18:11 +02:00
|
|
|
|
|
|
|
PRIVATE eoi_method_t set_eoi_method(unsigned irq)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* in APIC mode the lowest 16 IRQs are reserved for legacy (E)ISA edge
|
|
|
|
* triggered interrupts. All the rest is for PCI level triggered
|
|
|
|
* interrupts
|
|
|
|
*/
|
|
|
|
if (irq < 16)
|
|
|
|
return ioapic_eoi_edge;
|
|
|
|
else
|
|
|
|
return ioapic_eoi_level;
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void set_irq_redir_low(unsigned irq, u32_t * low)
|
|
|
|
{
|
|
|
|
u32_t val = 0;
|
|
|
|
|
|
|
|
/* clear the polarity, trigger, mask and vector fields */
|
|
|
|
val &= ~(APIC_ICR_VECTOR | APIC_ICR_INT_MASK |
|
|
|
|
APIC_ICR_TRIGGER | APIC_ICR_INT_POLARITY);
|
|
|
|
|
|
|
|
if (irq < 16) {
|
|
|
|
/* ISA active-high */
|
|
|
|
val &= ~APIC_ICR_INT_POLARITY;
|
|
|
|
/* ISA edge triggered */
|
|
|
|
val &= ~APIC_ICR_TRIGGER;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* PCI active-low */
|
|
|
|
val |= APIC_ICR_INT_POLARITY;
|
|
|
|
/* PCI level triggered */
|
|
|
|
val |= APIC_ICR_TRIGGER;
|
|
|
|
}
|
|
|
|
|
|
|
|
val |= io_apic_irq[irq].vector;
|
|
|
|
|
|
|
|
*low = val;
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void ioapic_set_irq(unsigned irq)
|
|
|
|
{
|
|
|
|
unsigned ioa;
|
|
|
|
|
|
|
|
assert(irq < NR_IRQ_VECTORS);
|
|
|
|
|
|
|
|
/* shared irq, already set */
|
|
|
|
if (io_apic_irq[irq].ioa && io_apic_irq[irq].eoi)
|
|
|
|
return;
|
|
|
|
|
|
|
|
assert(!io_apic_irq[irq].ioa || !io_apic_irq[irq].eoi);
|
|
|
|
|
|
|
|
for (ioa = 0; ioa < nioapics; ioa++) {
|
|
|
|
if (io_apic[ioa].gsi_base <= irq &&
|
|
|
|
io_apic[ioa].gsi_base +
|
|
|
|
io_apic[ioa].pins > irq) {
|
|
|
|
u32_t hi_32, low_32;
|
|
|
|
|
|
|
|
io_apic_irq[irq].ioa = &io_apic[ioa];
|
|
|
|
io_apic_irq[irq].pin = irq - io_apic[ioa].gsi_base;
|
|
|
|
io_apic_irq[irq].eoi = set_eoi_method(irq);
|
|
|
|
io_apic_irq[irq].vector = LAPIC_VECTOR(irq);
|
|
|
|
|
|
|
|
set_irq_redir_low(irq, &low_32);
|
|
|
|
/*
|
|
|
|
* route the interrupts to the bsp by default
|
|
|
|
*/
|
|
|
|
hi_32 = 0;
|
|
|
|
ioapic_redirt_entry_write((void *) io_apic[ioa].addr,
|
|
|
|
io_apic_irq[irq].pin, hi_32, low_32);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void ioapic_unset_irq(unsigned irq)
|
|
|
|
{
|
|
|
|
assert(irq < NR_IRQ_VECTORS);
|
|
|
|
|
|
|
|
ioapic_disable_irq(irq);
|
|
|
|
io_apic_irq[irq].ioa = NULL;
|
|
|
|
io_apic_irq[irq].eoi = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void ioapic_reset_pic(void)
|
|
|
|
{
|
|
|
|
apic_idt_init(TRUE); /* reset */
|
|
|
|
idt_reload();
|
|
|
|
|
|
|
|
/* Enable 8259 - write 0x00 in OCW1
|
|
|
|
* master and slave. */
|
|
|
|
outb(0x22, 0x70);
|
|
|
|
outb(0x23, 0x00);
|
|
|
|
|
|
|
|
intr_init(INTS_ORIG, 0); /* no auto eoi */
|
|
|
|
}
|
|
|
|
|
|
|
|
PRIVATE void irq_lapic_status(int irq)
|
|
|
|
{
|
|
|
|
u32_t lo;
|
|
|
|
reg_t tmr, irr, isr;
|
|
|
|
int vector;
|
|
|
|
struct irq * intr;
|
|
|
|
|
|
|
|
intr = &io_apic_irq[irq];
|
|
|
|
|
|
|
|
if (!intr->ioa)
|
|
|
|
return;
|
|
|
|
|
|
|
|
vector = LAPIC_VECTOR(irq);
|
|
|
|
tmr = apic_read_tmr_vector(vector);
|
|
|
|
irr = apic_read_irr_vector(vector);
|
|
|
|
isr = apic_read_isr_vector(vector);
|
|
|
|
|
|
|
|
|
|
|
|
if (lapic_test_delivery_val(isr, vector)) {
|
|
|
|
printf("IRQ %d vec %d trigger %s irr %d isr %d\n",
|
|
|
|
irq, vector,
|
|
|
|
lapic_test_delivery_val(tmr, vector) ?
|
|
|
|
"level" : "edge",
|
|
|
|
lapic_test_delivery_val(irr, vector) ? 1 : 0,
|
|
|
|
lapic_test_delivery_val(isr, vector) ? 1 : 0);
|
|
|
|
} else {
|
|
|
|
printf("IRQ %d vec %d irr %d\n",
|
|
|
|
irq, vector,
|
|
|
|
lapic_test_delivery_val(irr, vector) ? 1 : 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
lo = ioapic_read(intr->ioa->addr,
|
|
|
|
IOAPIC_REDIR_TABLE + intr->pin * 2);
|
|
|
|
printf("\tpin %2d vec 0x%02x ioa %d redir_lo 0x%08x %s\n",
|
|
|
|
intr->pin,
|
|
|
|
intr->vector,
|
|
|
|
intr->ioa->id,
|
|
|
|
lo,
|
|
|
|
intr->state & IOAPIC_IRQ_STATE_MASKED ?
|
|
|
|
"masked" : "unmasked");
|
|
|
|
}
|
|
|
|
|
|
|
|
PUBLIC void dump_apic_irq_state(void)
|
|
|
|
{
|
|
|
|
int irq;
|
|
|
|
|
|
|
|
printf("--- IRQs state dump ---\n");
|
|
|
|
for (irq = 0; irq < NR_IRQ_VECTORS; irq++) {
|
|
|
|
irq_lapic_status(irq);
|
|
|
|
}
|
|
|
|
printf("--- all ---\n");
|
|
|
|
}
|