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Message-Id: <1218843762-14650-6-git-send-email-yhlu.kernel@gmail.com>
Date: Fri, 15 Aug 2008 16:42:40 -0700
From: Yinghai Lu <yhlu.kernel@...il.com>
To: Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Yinghai Lu <yhlu.kernel@...il.com>
Subject: [PATCH 5/7] x86: make io_apic_64.c and io_apic_32.c the same
all the same except INTR_REMAPPING related and ioapic io resource
Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
---
arch/x86/kernel/io_apic_32.c | 213 ++++++++++++-
arch/x86/kernel/io_apic_64.c | 666 ++++++++++++++++++++++++++++++++++++++++---
2 files changed, 832 insertions(+), 47 deletions(-)
Index: linux-2.6/arch/x86/kernel/io_apic_32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/io_apic_32.c
+++ linux-2.6/arch/x86/kernel/io_apic_32.c
@@ -123,7 +123,6 @@ struct irq_cfg {
u8 move_in_progress : 1;
};
-
/* irq_cfg is indexed by the sum of all RTEs in all I/O APICs. */
static struct irq_cfg irq_cfg_legacy[] __initdata = {
[0] = { .irq = 0, .domain = CPU_MASK_ALL, .vector = IRQ0_VECTOR, },
@@ -391,6 +390,38 @@ static inline void io_apic_modify(unsign
writel(value, &io_apic->data);
}
+#ifdef CONFIG_X86_64
+static bool io_apic_level_ack_pending(unsigned int irq)
+{
+ struct irq_pin_list *entry;
+ unsigned long flags;
+ struct irq_cfg *cfg = irq_cfg(irq);
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ entry = cfg->irq_2_pin;
+ for (;;) {
+ unsigned int reg;
+ int pin;
+
+ if (!entry)
+ break;
+ pin = entry->pin;
+ reg = io_apic_read(entry->apic, 0x10 + pin*2);
+ /* Is the remote IRR bit set? */
+ if (reg & IO_APIC_REDIR_REMOTE_IRR) {
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ return true;
+ }
+ if (!entry->next)
+ break;
+ entry = entry->next;
+ }
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ return false;
+}
+#endif
+
union entry_union {
struct { u32 w1, w2; };
struct IO_APIC_route_entry entry;
@@ -483,17 +514,15 @@ static void set_ioapic_affinity_irq(unsi
unsigned int dest;
cpumask_t tmp;
- cfg = irq_cfg(irq);
-
cpus_and(tmp, mask, cpu_online_map);
if (cpus_empty(tmp))
return;
+ cfg = irq_cfg(irq);
if (assign_irq_vector(irq, mask))
return;
cpus_and(tmp, cfg->domain, mask);
-
dest = cpu_mask_to_apicid(tmp);
/*
* Only the high 8 bits are valid.
@@ -572,6 +601,54 @@ static void __init replace_pin_at_irq(un
add_pin_to_irq(irq, newapic, newpin);
}
+#ifdef CONFIG_X86_64
+/*
+ * Synchronize the IO-APIC and the CPU by doing
+ * a dummy read from the IO-APIC
+ */
+static inline void io_apic_sync(unsigned int apic)
+{
+ struct io_apic __iomem *io_apic = io_apic_base(apic);
+ readl(&io_apic->data);
+}
+
+#define __DO_ACTION(R, ACTION, FINAL) \
+ \
+{ \
+ int pin; \
+ struct irq_cfg *cfg; \
+ struct irq_pin_list *entry; \
+ \
+ cfg = irq_cfg(irq); \
+ entry = cfg->irq_2_pin; \
+ for (;;) { \
+ unsigned int reg; \
+ if (!entry) \
+ break; \
+ pin = entry->pin; \
+ reg = io_apic_read(entry->apic, 0x10 + R + pin*2); \
+ reg ACTION; \
+ io_apic_modify(entry->apic, 0x10 + R + pin*2, reg); \
+ FINAL; \
+ if (!entry->next) \
+ break; \
+ entry = entry->next; \
+ } \
+}
+
+#define DO_ACTION(name,R,ACTION, FINAL) \
+ \
+ static void name##_IO_APIC_irq (unsigned int irq) \
+ __DO_ACTION(R, ACTION, FINAL)
+
+/* mask = 1 */
+DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MASKED, io_apic_sync(entry->apic))
+
+/* mask = 0 */
+DO_ACTION(__unmask, 0, &= ~IO_APIC_REDIR_MASKED, )
+
+#else
+
static void __modify_IO_APIC_irq(unsigned int irq, unsigned long enable, unsigned long disable)
{
struct irq_cfg *cfg;
@@ -620,6 +697,8 @@ static void __unmask_and_level_IO_APIC_i
IO_APIC_REDIR_MASKED);
}
+#endif
+
static void mask_IO_APIC_irq(unsigned int irq)
{
unsigned long flags;
@@ -1055,6 +1134,17 @@ void unlock_vector_lock(void)
static int __assign_irq_vector(int irq, cpumask_t mask)
{
+ /*
+ * NOTE! The local APIC isn't very good at handling
+ * multiple interrupts at the same interrupt level.
+ * As the interrupt level is determined by taking the
+ * vector number and shifting that right by 4, we
+ * want to spread these out a bit so that they don't
+ * all fall in the same interrupt level.
+ *
+ * Also, we've got to be careful not to trash gate
+ * 0x80, because int 0x80 is hm, kind of importantish. ;)
+ */
static int current_vector = FIRST_DEVICE_VECTOR, current_offset = 0;
unsigned int old_vector;
int cpu;
@@ -1095,9 +1185,13 @@ next:
}
if (unlikely(current_vector == vector))
continue;
- if (vector == SYSCALL_VECTOR)
+#ifdef CONFIG_X86_64
+ if (vector == IA32_SYSCALL_VECTOR)
goto next;
-
+#else
+ if (vector == SYSCALL_VECTOR)
+ goto next;
+#endif
for_each_cpu_mask_nr(new_cpu, new_mask)
if (per_cpu(vector_irq, new_cpu)[vector] != -1)
goto next;
@@ -1184,6 +1278,7 @@ static struct irq_chip ioapic_chip;
#define IOAPIC_EDGE 0
#define IOAPIC_LEVEL 1
+#ifdef CONFIG_X86_32
static inline int IO_APIC_irq_trigger(int irq)
{
int apic, idx, pin;
@@ -1200,6 +1295,12 @@ static inline int IO_APIC_irq_trigger(in
*/
return 0;
}
+#else
+static inline int IO_APIC_irq_trigger(int irq)
+{
+ return 1;
+}
+#endif
static void ioapic_register_intr(int irq, unsigned long trigger)
{
@@ -1212,15 +1313,18 @@ static void ioapic_register_intr(int irq
desc = irq_desc_with_new(irq);
if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
- trigger == IOAPIC_LEVEL) {
+ trigger == IOAPIC_LEVEL)
desc->status |= IRQ_LEVEL;
+ else
+ desc->status &= ~IRQ_LEVEL;
+
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+ trigger == IOAPIC_LEVEL)
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_fasteoi_irq, "fasteoi");
- } else {
- desc->status &= ~IRQ_LEVEL;
+ else
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_edge_irq, "edge");
- }
}
static int setup_ioapic_entry(int apic, int irq,
@@ -1662,7 +1766,6 @@ static void __init enable_IO_APIC(void)
struct IO_APIC_route_entry entry;
entry = ioapic_read_entry(apic, pin);
-
/* If the interrupt line is enabled and in ExtInt mode
* I have found the pin where the i8259 is connected.
*/
@@ -2012,6 +2115,60 @@ static void ack_apic_edge(unsigned int i
ack_APIC_irq();
}
+#ifdef CONFIG_X86_64
+static void ack_apic_level(unsigned int irq, struct irq_desc *desc)
+{
+ int do_unmask_irq = 0;
+
+ irq_complete_move(irq);
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+ /* If we are moving the irq we need to mask it */
+ if (unlikely(desc->status & IRQ_MOVE_PENDING)) {
+ do_unmask_irq = 1;
+ mask_IO_APIC_irq(irq);
+ }
+#endif
+
+ /*
+ * We must acknowledge the irq before we move it or the acknowledge will
+ * not propagate properly.
+ */
+ ack_APIC_irq();
+
+ /* Now we can move and renable the irq */
+ if (unlikely(do_unmask_irq)) {
+ /* Only migrate the irq if the ack has been received.
+ *
+ * On rare occasions the broadcast level triggered ack gets
+ * delayed going to ioapics, and if we reprogram the
+ * vector while Remote IRR is still set the irq will never
+ * fire again.
+ *
+ * To prevent this scenario we read the Remote IRR bit
+ * of the ioapic. This has two effects.
+ * - On any sane system the read of the ioapic will
+ * flush writes (and acks) going to the ioapic from
+ * this cpu.
+ * - We get to see if the ACK has actually been delivered.
+ *
+ * Based on failed experiments of reprogramming the
+ * ioapic entry from outside of irq context starting
+ * with masking the ioapic entry and then polling until
+ * Remote IRR was clear before reprogramming the
+ * ioapic I don't trust the Remote IRR bit to be
+ * completey accurate.
+ *
+ * However there appears to be no other way to plug
+ * this race, so if the Remote IRR bit is not
+ * accurate and is causing problems then it is a hardware bug
+ * and you can go talk to the chipset vendor about it.
+ */
+ if (!io_apic_level_ack_pending(irq))
+ move_masked_irq(irq, desc);
+ unmask_IO_APIC_irq(irq);
+ }
+}
+#else
atomic_t irq_mis_count;
static void ack_apic_level(unsigned int irq, struct irq_desc *desc)
{
@@ -2053,6 +2210,7 @@ static void ack_apic_level(unsigned int
spin_unlock(&ioapic_lock);
}
}
+#endif
static struct irq_chip ioapic_chip __read_mostly = {
.name = "IO-APIC",
@@ -2224,7 +2382,7 @@ static inline void __init unlock_ExtINT_
}
static int disable_timer_pin_1 __initdata;
-
+/* Actually the next is obsolete, but keep it for paranoid reasons -AK */
static int __init parse_disable_timer_pin_1(char *arg)
{
disable_timer_pin_1 = 1;
@@ -2244,9 +2402,9 @@ static inline void __init check_timer(vo
{
struct irq_cfg *cfg = irq_cfg(0);
int apic1, pin1, apic2, pin2;
- int no_pin1 = 0;
- unsigned int ver;
unsigned long flags;
+ unsigned int ver;
+ int no_pin1 = 0;
local_irq_save(flags);
@@ -2550,6 +2708,7 @@ unsigned int create_irq(unsigned int irq
cfg_new = irq_cfg(new);
if (cfg_new && cfg_new->vector != 0)
continue;
+ /* check if need to create one */
if (!cfg_new)
cfg_new = irq_cfg_with_new(new);
if (__assign_irq_vector(new, TARGET_CPUS) == 0)
@@ -2714,6 +2873,32 @@ int arch_setup_msi_irq(struct pci_dev *d
return 0;
}
+int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
+{
+ unsigned int irq;
+ int ret, sub_handle;
+ struct msi_desc *desc;
+ unsigned int irq_want;
+
+ irq_want = build_irq_for_pci_dev(dev) + 0x100;
+ sub_handle = 0;
+ list_for_each_entry(desc, &dev->msi_list, list) {
+ irq = create_irq(irq_want--);
+ if (irq == 0)
+ return -1;
+ ret = setup_msi_irq(dev, desc, irq);
+ if (ret < 0)
+ goto error;
+ sub_handle++;
+ }
+ return 0;
+
+error:
+ destroy_irq(irq);
+ return ret;
+}
+
+
void arch_teardown_msi_irq(unsigned int irq)
{
destroy_irq(irq);
Index: linux-2.6/arch/x86/kernel/io_apic_64.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/io_apic_64.c
+++ linux-2.6/arch/x86/kernel/io_apic_64.c
@@ -94,18 +94,22 @@ struct mp_config_intsrc mp_irqs[MAX_IRQ_
/* # of MP IRQ source entries */
int mp_irq_entries;
+#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
+int mp_bus_id_to_type[MAX_MP_BUSSES];
+#endif
+
DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
int skip_ioapic_setup;
static int __init parse_noapic(char *str)
{
+ /* disable IO-APIC */
disable_ioapic_setup();
return 0;
}
early_param("noapic", parse_noapic);
-
struct irq_cfg;
struct irq_pin_list;
struct irq_cfg {
@@ -374,6 +378,8 @@ static inline void io_apic_write(unsigne
/*
* Re-write a value: to be used for read-modify-write
* cycles where the read already set up the index register.
+ *
+ * Older SiS APIC requires we rewrite the index register
*/
static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
@@ -383,6 +389,7 @@ static inline void io_apic_modify(unsign
writel(value, &io_apic->data);
}
+#ifdef CONFIG_X86_64
static bool io_apic_level_ack_pending(unsigned int irq)
{
struct irq_pin_list *entry;
@@ -412,6 +419,7 @@ static bool io_apic_level_ack_pending(un
return false;
}
+#endif
union entry_union {
struct { u32 w1, w2; };
@@ -509,7 +517,7 @@ static int assign_irq_vector(int irq, cp
static void set_ioapic_affinity_irq(unsigned int irq, struct irq_desc *desc, cpumask_t mask)
{
- struct irq_cfg *cfg = irq_cfg(irq);
+ struct irq_cfg *cfg;
unsigned long flags;
unsigned int dest;
cpumask_t tmp;
@@ -518,12 +526,12 @@ static void set_ioapic_affinity_irq(unsi
if (cpus_empty(tmp))
return;
+ cfg = irq_cfg(irq);
if (assign_irq_vector(irq, mask))
return;
cpus_and(tmp, cfg->domain, mask);
dest = cpu_mask_to_apicid(tmp);
-
/*
* Only the high 8 bits are valid.
*/
@@ -534,7 +542,7 @@ static void set_ioapic_affinity_irq(unsi
desc->affinity = mask;
spin_unlock_irqrestore(&ioapic_lock, flags);
}
-#endif
+#endif /* CONFIG_SMP */
/*
* The common case is 1:1 IRQ<->pin mappings. Sometimes there are
@@ -600,6 +608,7 @@ static void __init replace_pin_at_irq(un
add_pin_to_irq(irq, newapic, newpin);
}
+#ifdef CONFIG_X86_64
/*
* Synchronize the IO-APIC and the CPU by doing
* a dummy read from the IO-APIC
@@ -645,6 +654,58 @@ DO_ACTION(__mask, 0, |= IO_APIC_REDIR_MA
/* mask = 0 */
DO_ACTION(__unmask, 0, &= ~IO_APIC_REDIR_MASKED, )
+#else
+
+static void __modify_IO_APIC_irq(unsigned int irq, unsigned long enable, unsigned long disable)
+{
+ struct irq_cfg *cfg;
+ struct irq_pin_list *entry;
+ unsigned int pin, reg;
+
+ cfg = irq_cfg(irq);
+ entry = cfg->irq_2_pin;
+ for (;;) {
+ if (!entry)
+ break;
+ pin = entry->pin;
+ reg = io_apic_read(entry->apic, 0x10 + pin*2);
+ reg &= ~disable;
+ reg |= enable;
+ io_apic_modify(entry->apic, 0x10 + pin*2, reg);
+ if (!entry->next)
+ break;
+ entry = entry->next;
+ }
+}
+
+/* mask = 1 */
+static void __mask_IO_APIC_irq(unsigned int irq)
+{
+ __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED, 0);
+}
+
+/* mask = 0 */
+static void __unmask_IO_APIC_irq(unsigned int irq)
+{
+ __modify_IO_APIC_irq(irq, 0, IO_APIC_REDIR_MASKED);
+}
+
+/* mask = 1, trigger = 0 */
+static void __mask_and_edge_IO_APIC_irq(unsigned int irq)
+{
+ __modify_IO_APIC_irq(irq, IO_APIC_REDIR_MASKED,
+ IO_APIC_REDIR_LEVEL_TRIGGER);
+}
+
+/* mask = 0, trigger = 1 */
+static void __unmask_and_level_IO_APIC_irq(unsigned int irq)
+{
+ __modify_IO_APIC_irq(irq, IO_APIC_REDIR_LEVEL_TRIGGER,
+ IO_APIC_REDIR_MASKED);
+}
+
+#endif
+
static void mask_IO_APIC_irq (unsigned int irq)
{
unsigned long flags;
@@ -686,6 +747,64 @@ static void clear_IO_APIC (void)
clear_IO_APIC_pin(apic, pin);
}
+#if !defined(CONFIG_SMP) && defined(CONFIG_X86_32)
+void send_IPI_self(int vector)
+{
+ unsigned int cfg;
+
+ /*
+ * Wait for idle.
+ */
+ apic_wait_icr_idle();
+ cfg = APIC_DM_FIXED | APIC_DEST_SELF | vector | APIC_DEST_LOGICAL;
+ /*
+ * Send the IPI. The write to APIC_ICR fires this off.
+ */
+ apic_write(APIC_ICR, cfg);
+}
+#endif /* !CONFIG_SMP && CONFIG_X86_32*/
+
+#ifdef CONFIG_X86_32
+/*
+ * support for broken MP BIOSs, enables hand-redirection of PIRQ0-7 to
+ * specific CPU-side IRQs.
+ */
+
+#define MAX_PIRQS 8
+static int pirq_entries [MAX_PIRQS];
+static int pirqs_enabled;
+
+static int __init ioapic_pirq_setup(char *str)
+{
+ int i, max;
+ int ints[MAX_PIRQS+1];
+
+ get_options(str, ARRAY_SIZE(ints), ints);
+
+ for (i = 0; i < MAX_PIRQS; i++)
+ pirq_entries[i] = -1;
+
+ pirqs_enabled = 1;
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "PIRQ redirection, working around broken MP-BIOS.\n");
+ max = MAX_PIRQS;
+ if (ints[0] < MAX_PIRQS)
+ max = ints[0];
+
+ for (i = 0; i < max; i++) {
+ apic_printk(APIC_VERBOSE, KERN_DEBUG
+ "... PIRQ%d -> IRQ %d\n", i, ints[i+1]);
+ /*
+ * PIRQs are mapped upside down, usually.
+ */
+ pirq_entries[MAX_PIRQS-i-1] = ints[i+1];
+ }
+ return 1;
+}
+
+__setup("pirq=", ioapic_pirq_setup);
+#endif /* CONFIG_X86_32 */
+
#ifdef CONFIG_INTR_REMAP
/* I/O APIC RTE contents at the OS boot up */
static struct IO_APIC_route_entry *early_ioapic_entries[MAX_IO_APICS];
@@ -859,18 +978,54 @@ int IO_APIC_get_PCI_irq_vector(int bus,
return best_guess;
}
+EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector);
+
+#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+/*
+ * EISA Edge/Level control register, ELCR
+ */
+static int EISA_ELCR(unsigned int irq)
+{
+ if (irq < 16) {
+ unsigned int port = 0x4d0 + (irq >> 3);
+ return (inb(port) >> (irq & 7)) & 1;
+ }
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "Broken MPtable reports ISA irq %d\n", irq);
+ return 0;
+}
+
+#endif
+
/* ISA interrupts are always polarity zero edge triggered,
* when listed as conforming in the MP table. */
#define default_ISA_trigger(idx) (0)
#define default_ISA_polarity(idx) (0)
+/* EISA interrupts are always polarity zero and can be edge or level
+ * trigger depending on the ELCR value. If an interrupt is listed as
+ * EISA conforming in the MP table, that means its trigger type must
+ * be read in from the ELCR */
+
+#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mp_srcbusirq))
+#define default_EISA_polarity(idx) default_ISA_polarity(idx)
+
/* PCI interrupts are always polarity one level triggered,
* when listed as conforming in the MP table. */
#define default_PCI_trigger(idx) (1)
#define default_PCI_polarity(idx) (1)
+/* EISA interrupts are always polarity zero and can be edge or level
+ * trigger depending on the ELCR value. If an interrupt is listed as
+ * EISA conforming in the MP table, that means its trigger type must
+ * be read in from the ELCR */
+
+#define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].mp_srcbusirq))
+#define default_EISA_polarity(idx) default_ISA_polarity(idx)
+
+
static int MPBIOS_polarity(int idx)
{
int bus = mp_irqs[idx].mp_srcbus;
@@ -928,6 +1083,36 @@ static int MPBIOS_trigger(int idx)
trigger = default_ISA_trigger(idx);
else
trigger = default_PCI_trigger(idx);
+#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+ switch (mp_bus_id_to_type[bus]) {
+ case MP_BUS_ISA: /* ISA pin */
+ {
+ /* set before the switch */
+ break;
+ }
+ case MP_BUS_EISA: /* EISA pin */
+ {
+ trigger = default_EISA_trigger(idx);
+ break;
+ }
+ case MP_BUS_PCI: /* PCI pin */
+ {
+ /* set before the switch */
+ break;
+ }
+ case MP_BUS_MCA: /* MCA pin */
+ {
+ trigger = default_MCA_trigger(idx);
+ break;
+ }
+ default:
+ {
+ printk(KERN_WARNING "broken BIOS!!\n");
+ trigger = 1;
+ break;
+ }
+ }
+#endif
break;
case 1: /* edge */
{
@@ -965,6 +1150,7 @@ static inline int irq_trigger(int idx)
return MPBIOS_trigger(idx);
}
+int (*ioapic_renumber_irq)(int ioapic, int irq);
static int pin_2_irq(int idx, int apic, int pin)
{
int irq, i;
@@ -986,7 +1172,32 @@ static int pin_2_irq(int idx, int apic,
while (i < apic)
irq += nr_ioapic_registers[i++];
irq += pin;
+ /*
+ * For MPS mode, so far only needed by ES7000 platform
+ */
+ if (ioapic_renumber_irq)
+ irq = ioapic_renumber_irq(apic, irq);
+ }
+
+#ifdef CONFIG_X86_32
+ /*
+ * PCI IRQ command line redirection. Yes, limits are hardcoded.
+ */
+ if ((pin >= 16) && (pin <= 23)) {
+ if (pirq_entries[pin-16] != -1) {
+ if (!pirq_entries[pin-16]) {
+ apic_printk(APIC_VERBOSE, KERN_DEBUG
+ "disabling PIRQ%d\n", pin-16);
+ } else {
+ irq = pirq_entries[pin-16];
+ apic_printk(APIC_VERBOSE, KERN_DEBUG
+ "using PIRQ%d -> IRQ %d\n",
+ pin-16, irq);
+ }
+ }
}
+#endif
+
return irq;
}
@@ -1056,8 +1267,13 @@ next:
}
if (unlikely(current_vector == vector))
continue;
+#ifdef CONFIG_X86_64
if (vector == IA32_SYSCALL_VECTOR)
goto next;
+#else
+ if (vector == SYSCALL_VECTOR)
+ goto next;
+#endif
for_each_cpu_mask_nr(new_cpu, new_mask)
if (per_cpu(vector_irq, new_cpu)[vector] != -1)
goto next;
@@ -1138,6 +1354,34 @@ static struct irq_chip ioapic_chip;
static struct irq_chip ir_ioapic_chip;
#endif
+#define IOAPIC_AUTO -1
+#define IOAPIC_EDGE 0
+#define IOAPIC_LEVEL 1
+
+#ifdef CONFIG_X86_32
+static inline int IO_APIC_irq_trigger(int irq)
+{
+ int apic, idx, pin;
+
+ for (apic = 0; apic < nr_ioapics; apic++) {
+ for (pin = 0; pin < nr_ioapic_registers[apic]; pin++) {
+ idx = find_irq_entry(apic, pin, mp_INT);
+ if ((idx != -1) && (irq == pin_2_irq(idx, apic, pin)))
+ return irq_trigger(idx);
+ }
+ }
+ /*
+ * nonexistent IRQs are edge default
+ */
+ return 0;
+}
+#else
+static inline int IO_APIC_irq_trigger(int irq)
+{
+ return 1;
+}
+#endif
+
static void ioapic_register_intr(int irq, unsigned long trigger)
{
struct irq_desc *desc;
@@ -1148,7 +1392,8 @@ static void ioapic_register_intr(int irq
else
desc = irq_desc_with_new(irq);
- if (trigger)
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+ trigger == IOAPIC_LEVEL)
desc->status |= IRQ_LEVEL;
else
desc->status &= ~IRQ_LEVEL;
@@ -1166,7 +1411,8 @@ static void ioapic_register_intr(int irq
return;
}
#endif
- if (trigger)
+ if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) ||
+ trigger == IOAPIC_LEVEL)
set_irq_chip_and_handler_name(irq, &ioapic_chip,
handle_fasteoi_irq,
"fasteoi");
@@ -1301,6 +1547,10 @@ static void __init setup_IO_APIC_irqs(vo
}
irq = pin_2_irq(idx, apic, pin);
+#ifdef CONFIG_X86_32
+ if (multi_timer_check(apic, irq))
+ continue;
+#endif
add_pin_to_irq(irq, apic, pin);
setup_IO_APIC_irq(apic, pin, irq,
@@ -1358,6 +1608,7 @@ __apicdebuginit(void) print_IO_APIC(void
union IO_APIC_reg_00 reg_00;
union IO_APIC_reg_01 reg_01;
union IO_APIC_reg_02 reg_02;
+ union IO_APIC_reg_03 reg_03;
unsigned long flags;
struct irq_cfg *cfg;
@@ -1382,6 +1633,8 @@ __apicdebuginit(void) print_IO_APIC(void
reg_01.raw = io_apic_read(apic, 1);
if (reg_01.bits.version >= 0x10)
reg_02.raw = io_apic_read(apic, 2);
+ if (reg_01.bits.version >= 0x20)
+ reg_03.raw = io_apic_read(apic, 3);
spin_unlock_irqrestore(&ioapic_lock, flags);
printk("\n");
@@ -1397,11 +1650,27 @@ __apicdebuginit(void) print_IO_APIC(void
printk(KERN_DEBUG "....... : PRQ implemented: %X\n", reg_01.bits.PRQ);
printk(KERN_DEBUG "....... : IO APIC version: %04X\n", reg_01.bits.version);
- if (reg_01.bits.version >= 0x10) {
+ /*
+ * Some Intel chipsets with IO APIC VERSION of 0x1? don't have reg_02,
+ * but the value of reg_02 is read as the previous read register
+ * value, so ignore it if reg_02 == reg_01.
+ */
+ if (reg_01.bits.version >= 0x10 && reg_02.raw != reg_01.raw) {
printk(KERN_DEBUG ".... register #02: %08X\n", reg_02.raw);
printk(KERN_DEBUG "....... : arbitration: %02X\n", reg_02.bits.arbitration);
}
+ /*
+ * Some Intel chipsets with IO APIC VERSION of 0x2? don't have reg_02
+ * or reg_03, but the value of reg_0[23] is read as the previous read
+ * register value, so ignore it if reg_03 == reg_0[12].
+ */
+ if (reg_01.bits.version >= 0x20 && reg_03.raw != reg_02.raw &&
+ reg_03.raw != reg_01.raw) {
+ printk(KERN_DEBUG ".... register #03: %08X\n", reg_03.raw);
+ printk(KERN_DEBUG "....... : Boot DT : %X\n", reg_03.bits.boot_DT);
+ }
+
printk(KERN_DEBUG ".... IRQ redirection table:\n");
printk(KERN_DEBUG " NR Dst Mask Trig IRR Pol"
@@ -1473,7 +1742,7 @@ __apicdebuginit(void) print_APIC_bitfiel
__apicdebuginit(void) print_local_APIC(void *dummy)
{
unsigned int v, ver, maxlvt;
- unsigned long icr;
+ u64 icr;
if (apic_verbosity == APIC_QUIET)
return;
@@ -1490,11 +1759,13 @@ __apicdebuginit(void) print_local_APIC(v
v = apic_read(APIC_TASKPRI);
printk(KERN_DEBUG "... APIC TASKPRI: %08x (%02x)\n", v, v & APIC_TPRI_MASK);
- v = apic_read(APIC_ARBPRI);
- printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
- v & APIC_ARBPRI_MASK);
- v = apic_read(APIC_PROCPRI);
- printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
+ if (APIC_INTEGRATED(ver)) { /* !82489DX */
+ v = apic_read(APIC_ARBPRI);
+ printk(KERN_DEBUG "... APIC ARBPRI: %08x (%02x)\n", v,
+ v & APIC_ARBPRI_MASK);
+ v = apic_read(APIC_PROCPRI);
+ printk(KERN_DEBUG "... APIC PROCPRI: %08x\n", v);
+ }
v = apic_read(APIC_EOI);
printk(KERN_DEBUG "... APIC EOI: %08x\n", v);
@@ -1514,8 +1785,13 @@ __apicdebuginit(void) print_local_APIC(v
printk(KERN_DEBUG "... APIC IRR field:\n");
print_APIC_bitfield(APIC_IRR);
- v = apic_read(APIC_ESR);
- printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
+ if (APIC_INTEGRATED(ver)) { /* !82489DX */
+ if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
+ apic_write(APIC_ESR, 0);
+
+ v = apic_read(APIC_ESR);
+ printk(KERN_DEBUG "... APIC ESR: %08x\n", v);
+ }
icr = apic_icr_read();
printk(KERN_DEBUG "... APIC ICR: %08x\n", icr);
@@ -1606,6 +1882,13 @@ void __init enable_IO_APIC(void)
int apic;
unsigned long flags;
+#ifdef CONFIG_X86_32
+ int i;
+ if (!pirqs_enabled)
+ for (i = 0; i < MAX_PIRQS; i++)
+ pirq_entries[i] = -1;
+#endif
+
/*
* The number of IO-APIC IRQ registers (== #pins):
*/
@@ -1634,6 +1917,10 @@ void __init enable_IO_APIC(void)
}
found_i8259:
/* Look to see what if the MP table has reported the ExtINT */
+ /* If we could not find the appropriate pin by looking at the ioapic
+ * the i8259 probably is not connected the ioapic but give the
+ * mptable a chance anyway.
+ */
i8259_pin = find_isa_irq_pin(0, mp_ExtINT);
i8259_apic = find_isa_irq_apic(0, mp_ExtINT);
/* Trust the MP table if nothing is setup in the hardware */
@@ -1693,6 +1980,122 @@ void disable_IO_APIC(void)
disconnect_bsp_APIC(ioapic_i8259.pin != -1);
}
+#ifdef CONFIG_X86_32
+/*
+ * function to set the IO-APIC physical IDs based on the
+ * values stored in the MPC table.
+ *
+ * by Matt Domsch <Matt_Domsch@...l.com> Tue Dec 21 12:25:05 CST 1999
+ */
+
+static void __init setup_ioapic_ids_from_mpc(void)
+{
+ union IO_APIC_reg_00 reg_00;
+ physid_mask_t phys_id_present_map;
+ int apic;
+ int i;
+ unsigned char old_id;
+ unsigned long flags;
+
+ if (x86_quirks->setup_ioapic_ids && x86_quirks->setup_ioapic_ids())
+ return;
+
+ /*
+ * Don't check I/O APIC IDs for xAPIC systems. They have
+ * no meaning without the serial APIC bus.
+ */
+ if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ || APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+ return;
+ /*
+ * This is broken; anything with a real cpu count has to
+ * circumvent this idiocy regardless.
+ */
+ phys_id_present_map = ioapic_phys_id_map(phys_cpu_present_map);
+
+ /*
+ * Set the IOAPIC ID to the value stored in the MPC table.
+ */
+ for (apic = 0; apic < nr_ioapics; apic++) {
+
+ /* Read the register 0 value */
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(apic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ old_id = mp_ioapics[apic].mp_apicid;
+
+ if (mp_ioapics[apic].mp_apicid >= get_physical_broadcast()) {
+ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID is %d in the MPC table!...\n",
+ apic, mp_ioapics[apic].mp_apicid);
+ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
+ reg_00.bits.ID);
+ mp_ioapics[apic].mp_apicid = reg_00.bits.ID;
+ }
+
+ /*
+ * Sanity check, is the ID really free? Every APIC in a
+ * system must have a unique ID or we get lots of nice
+ * 'stuck on smp_invalidate_needed IPI wait' messages.
+ */
+ if (check_apicid_used(phys_id_present_map,
+ mp_ioapics[apic].mp_apicid)) {
+ printk(KERN_ERR "BIOS bug, IO-APIC#%d ID %d is already used!...\n",
+ apic, mp_ioapics[apic].mp_apicid);
+ for (i = 0; i < get_physical_broadcast(); i++)
+ if (!physid_isset(i, phys_id_present_map))
+ break;
+ if (i >= get_physical_broadcast())
+ panic("Max APIC ID exceeded!\n");
+ printk(KERN_ERR "... fixing up to %d. (tell your hw vendor)\n",
+ i);
+ physid_set(i, phys_id_present_map);
+ mp_ioapics[apic].mp_apicid = i;
+ } else {
+ physid_mask_t tmp;
+ tmp = apicid_to_cpu_present(mp_ioapics[apic].mp_apicid);
+ apic_printk(APIC_VERBOSE, "Setting %d in the "
+ "phys_id_present_map\n",
+ mp_ioapics[apic].mp_apicid);
+ physids_or(phys_id_present_map, phys_id_present_map, tmp);
+ }
+
+
+ /*
+ * We need to adjust the IRQ routing table
+ * if the ID changed.
+ */
+ if (old_id != mp_ioapics[apic].mp_apicid)
+ for (i = 0; i < mp_irq_entries; i++)
+ if (mp_irqs[i].mp_dstapic == old_id)
+ mp_irqs[i].mp_dstapic
+ = mp_ioapics[apic].mp_apicid;
+
+ /*
+ * Read the right value from the MPC table and
+ * write it into the ID register.
+ */
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "...changing IO-APIC physical APIC ID to %d ...",
+ mp_ioapics[apic].mp_apicid);
+
+ reg_00.bits.ID = mp_ioapics[apic].mp_apicid;
+ spin_lock_irqsave(&ioapic_lock, flags);
+
+ /*
+ * Sanity check
+ */
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(apic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+ if (reg_00.bits.ID != mp_ioapics[apic].mp_apicid)
+ printk("could not set ID!\n");
+ else
+ apic_printk(APIC_VERBOSE, " ok.\n");
+ }
+}
+#endif
+
int no_timer_check __initdata;
static int __init notimercheck(char *s)
@@ -1778,8 +2181,10 @@ static unsigned int startup_ioapic_irq(u
return was_pending;
}
+#ifdef CONFIG_X86_64
static int ioapic_retrigger_irq(unsigned int irq)
{
+
struct irq_cfg *cfg = irq_cfg(irq);
unsigned long flags;
@@ -1789,6 +2194,14 @@ static int ioapic_retrigger_irq(unsigned
return 1;
}
+#else
+static int ioapic_retrigger_irq(unsigned int irq)
+{
+ send_IPI_self(irq_cfg(irq)->vector);
+
+ return 1;
+}
+#endif
/*
* Level and edge triggered IO-APIC interrupts need different handling,
@@ -1948,7 +2361,9 @@ asmlinkage void smp_irq_move_cleanup_int
{
unsigned vector, me;
ack_APIC_irq();
+#ifdef CONFIG_X86_64
exit_idle();
+#endif
irq_enter();
me = smp_processor_id();
@@ -2020,6 +2435,7 @@ static void ack_apic_edge(unsigned int i
ack_APIC_irq();
}
+#ifdef CONFIG_X86_64
static void ack_apic_level(unsigned int irq, struct irq_desc *desc)
{
int do_unmask_irq = 0;
@@ -2072,6 +2488,49 @@ static void ack_apic_level(unsigned int
unmask_IO_APIC_irq(irq);
}
}
+#else
+atomic_t irq_mis_count;
+static void ack_apic_level(unsigned int irq, struct irq_desc *desc)
+{
+ unsigned long v;
+ int i;
+
+ irq_complete_move(irq);
+ move_native_irq(irq, desc);
+ /*
+ * It appears there is an erratum which affects at least version 0x11
+ * of I/O APIC (that's the 82093AA and cores integrated into various
+ * chipsets). Under certain conditions a level-triggered interrupt is
+ * erroneously delivered as edge-triggered one but the respective IRR
+ * bit gets set nevertheless. As a result the I/O unit expects an EOI
+ * message but it will never arrive and further interrupts are blocked
+ * from the source. The exact reason is so far unknown, but the
+ * phenomenon was observed when two consecutive interrupt requests
+ * from a given source get delivered to the same CPU and the source is
+ * temporarily disabled in between.
+ *
+ * A workaround is to simulate an EOI message manually. We achieve it
+ * by setting the trigger mode to edge and then to level when the edge
+ * trigger mode gets detected in the TMR of a local APIC for a
+ * level-triggered interrupt. We mask the source for the time of the
+ * operation to prevent an edge-triggered interrupt escaping meanwhile.
+ * The idea is from Manfred Spraul. --macro
+ */
+ i = irq_cfg(irq)->vector;
+
+ v = apic_read(APIC_TMR + ((i & ~0x1f) >> 1));
+
+ ack_APIC_irq();
+
+ if (!(v & (1 << (i & 0x1f)))) {
+ atomic_inc(&irq_mis_count);
+ spin_lock(&ioapic_lock);
+ __mask_and_edge_IO_APIC_irq(irq);
+ __unmask_and_level_IO_APIC_irq(irq);
+ spin_unlock(&ioapic_lock);
+ }
+}
+#endif
static struct irq_chip ioapic_chip __read_mostly = {
.name = "IO-APIC",
@@ -2137,20 +2596,24 @@ static inline void init_IO_APIC_traps(vo
}
}
-static void unmask_lapic_irq(unsigned int irq)
+/*
+ * The local APIC irq-chip implementation:
+ */
+
+static void mask_lapic_irq(unsigned int irq)
{
unsigned long v;
v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
+ apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
}
-static void mask_lapic_irq(unsigned int irq)
+static void unmask_lapic_irq(unsigned int irq)
{
unsigned long v;
v = apic_read(APIC_LVT0);
- apic_write(APIC_LVT0, v | APIC_LVT_MASKED);
+ apic_write(APIC_LVT0, v & ~APIC_LVT_MASKED);
}
static void ack_lapic_irq(unsigned int irq, struct irq_desc *desc)
@@ -2178,19 +2641,19 @@ static void lapic_register_intr(int irq)
static void __init setup_nmi(void)
{
/*
- * Dirty trick to enable the NMI watchdog ...
+ * Dirty trick to enable the NMI watchdog ...
* We put the 8259A master into AEOI mode and
* unmask on all local APICs LVT0 as NMI.
*
* The idea to use the 8259A in AEOI mode ('8259A Virtual Wire')
* is from Maciej W. Rozycki - so we do not have to EOI from
* the NMI handler or the timer interrupt.
- */
- printk(KERN_INFO "activating NMI Watchdog ...");
+ */
+ apic_printk(APIC_VERBOSE, KERN_INFO "activating NMI Watchdog ...");
enable_NMI_through_LVT0();
- printk(" done.\n");
+ apic_printk(APIC_VERBOSE, " done.\n");
}
/*
@@ -2207,12 +2670,17 @@ static inline void __init unlock_ExtINT_
unsigned char save_control, save_freq_select;
pin = find_isa_irq_pin(8, mp_INT);
+ if (pin == -1) {
+ WARN_ON_ONCE(1);
+ return;
+ }
apic = find_isa_irq_apic(8, mp_INT);
- if (pin == -1)
+ if (apic == -1) {
+ WARN_ON_ONCE(1);
return;
+ }
entry0 = ioapic_read_entry(apic, pin);
-
clear_IO_APIC_pin(apic, pin);
memset(&entry1, 0, sizeof(entry1));
@@ -2264,17 +2732,21 @@ int timer_through_8259 __initdata;
* is so screwy. Thanks to Brian Perkins for testing/hacking this beast
* fanatically on his truly buggy board.
*
- * FIXME: really need to revamp this for modern platforms only.
+ * FIXME: really need to revamp this for all platforms.
*/
static inline void __init check_timer(void)
{
struct irq_cfg *cfg = irq_cfg(0);
int apic1, pin1, apic2, pin2;
unsigned long flags;
+ unsigned int ver;
int no_pin1 = 0;
local_irq_save(flags);
+ ver = apic_read(APIC_LVR);
+ ver = GET_APIC_VERSION(ver);
+
/*
* get/set the timer IRQ vector:
*/
@@ -2283,10 +2755,18 @@ static inline void __init check_timer(vo
/*
* As IRQ0 is to be enabled in the 8259A, the virtual
- * wire has to be disabled in the local APIC.
+ * wire has to be disabled in the local APIC. Also
+ * timer interrupts need to be acknowledged manually in
+ * the 8259A for the i82489DX when using the NMI
+ * watchdog as that APIC treats NMIs as level-triggered.
+ * The AEOI mode will finish them in the 8259A
+ * automatically.
*/
apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_EXTINT);
init_8259A(1);
+#ifdef CONFIG_X86_32
+ timer_ack = (nmi_watchdog == NMI_IO_APIC && !APIC_INTEGRATED(ver));
+#endif
pin1 = find_isa_irq_pin(0, mp_INT);
apic1 = find_isa_irq_apic(0, mp_INT);
@@ -2378,6 +2858,9 @@ static inline void __init check_timer(vo
"through the IO-APIC - disabling NMI Watchdog!\n");
nmi_watchdog = NMI_NONE;
}
+#ifdef CONFIG_X86_32
+ timer_ack = 0;
+#endif
apic_printk(APIC_QUIET, KERN_INFO
"...trying to set up timer as Virtual Wire IRQ...\n");
@@ -2431,19 +2914,29 @@ out:
* the I/O APIC in all cases now. No actual device should request
* it anyway. --macro
*/
-#define PIC_IRQS (1<<2)
+#define PIC_IRQS (1 << PIC_CASCADE_IR)
void __init setup_IO_APIC(void)
{
+#ifdef CONFIG_X86_32
+ enable_IO_APIC();
+#else
/*
* calling enable_IO_APIC() is moved to setup_local_APIC for BP
*/
+#endif
io_apic_irqs = ~PIC_IRQS;
apic_printk(APIC_VERBOSE, "ENABLING IO-APIC IRQs\n");
-
+ /*
+ * Set up IO-APIC IRQ routing.
+ */
+#ifdef CONFIG_X86_32
+ if (!acpi_ioapic)
+ setup_ioapic_ids_from_mpc();
+#endif
sync_Arb_IDs();
setup_IO_APIC_irqs();
init_IO_APIC_traps();
@@ -3104,7 +3597,93 @@ int arch_setup_ht_irq(unsigned int irq,
#ifdef CONFIG_ACPI
-#define IO_APIC_MAX_ID 0xFE
+#ifdef CONFIG_X86_32
+int __init io_apic_get_unique_id(int ioapic, int apic_id)
+{
+ union IO_APIC_reg_00 reg_00;
+ static physid_mask_t apic_id_map = PHYSID_MASK_NONE;
+ physid_mask_t tmp;
+ unsigned long flags;
+ int i = 0;
+
+ /*
+ * The P4 platform supports up to 256 APIC IDs on two separate APIC
+ * buses (one for LAPICs, one for IOAPICs), where predecessors only
+ * supports up to 16 on one shared APIC bus.
+ *
+ * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full
+ * advantage of new APIC bus architecture.
+ */
+
+ if (physids_empty(apic_id_map))
+ apic_id_map = ioapic_phys_id_map(phys_cpu_present_map);
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_00.raw = io_apic_read(ioapic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ if (apic_id >= get_physical_broadcast()) {
+ printk(KERN_WARNING "IOAPIC[%d]: Invalid apic_id %d, trying "
+ "%d\n", ioapic, apic_id, reg_00.bits.ID);
+ apic_id = reg_00.bits.ID;
+ }
+
+ /*
+ * Every APIC in a system must have a unique ID or we get lots of nice
+ * 'stuck on smp_invalidate_needed IPI wait' messages.
+ */
+ if (check_apicid_used(apic_id_map, apic_id)) {
+
+ for (i = 0; i < get_physical_broadcast(); i++) {
+ if (!check_apicid_used(apic_id_map, i))
+ break;
+ }
+
+ if (i == get_physical_broadcast())
+ panic("Max apic_id exceeded!\n");
+
+ printk(KERN_WARNING "IOAPIC[%d]: apic_id %d already used, "
+ "trying %d\n", ioapic, apic_id, i);
+
+ apic_id = i;
+ }
+
+ tmp = apicid_to_cpu_present(apic_id);
+ physids_or(apic_id_map, apic_id_map, tmp);
+
+ if (reg_00.bits.ID != apic_id) {
+ reg_00.bits.ID = apic_id;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ io_apic_write(ioapic, 0, reg_00.raw);
+ reg_00.raw = io_apic_read(ioapic, 0);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ /* Sanity check */
+ if (reg_00.bits.ID != apic_id) {
+ printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic);
+ return -1;
+ }
+ }
+
+ apic_printk(APIC_VERBOSE, KERN_INFO
+ "IOAPIC[%d]: Assigned apic_id %d\n", ioapic, apic_id);
+
+ return apic_id;
+}
+
+int __init io_apic_get_version(int ioapic)
+{
+ union IO_APIC_reg_01 reg_01;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ioapic_lock, flags);
+ reg_01.raw = io_apic_read(ioapic, 1);
+ spin_unlock_irqrestore(&ioapic_lock, flags);
+
+ return reg_01.bits.version;
+}
+#endif
int __init io_apic_get_redir_entries (int ioapic)
{
@@ -3206,6 +3785,7 @@ void __init setup_ioapic_dest(void)
}
#endif
+#ifdef CONFIG_X86_64
#define IOAPIC_RESOURCE_NAME_SIZE 11
static struct resource *ioapic_resources;
@@ -3241,36 +3821,56 @@ static struct resource * __init ioapic_s
return res;
}
+#endif
void __init ioapic_init_mappings(void)
{
unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
- struct resource *ioapic_res;
int i;
+#ifdef CONFIG_X86_64
+ struct resource *ioapic_res;
ioapic_res = ioapic_setup_resources();
+#endif
for (i = 0; i < nr_ioapics; i++) {
if (smp_found_config) {
ioapic_phys = mp_ioapics[i].mp_apicaddr;
+#ifdef CONFIG_X86_32
+ if (!ioapic_phys) {
+ printk(KERN_ERR
+ "WARNING: bogus zero IO-APIC "
+ "address found in MPTABLE, "
+ "disabling IO/APIC support!\n");
+ smp_found_config = 0;
+ skip_ioapic_setup = 1;
+ goto fake_ioapic_page;
+ }
+#endif
} else {
+#ifdef CONFIG_X86_32
+fake_ioapic_page:
+#endif
ioapic_phys = (unsigned long)
alloc_bootmem_pages(PAGE_SIZE);
ioapic_phys = __pa(ioapic_phys);
}
set_fixmap_nocache(idx, ioapic_phys);
apic_printk(APIC_VERBOSE,
- "mapped IOAPIC to %016lx (%016lx)\n",
+ "mapped IOAPIC to %08lx (%08lx)\n",
__fix_to_virt(idx), ioapic_phys);
idx++;
+#ifdef CONFIG_X86_64
if (ioapic_res != NULL) {
ioapic_res->start = ioapic_phys;
ioapic_res->end = ioapic_phys + (4 * 1024) - 1;
ioapic_res++;
}
+#endif
}
}
+#ifdef CONFIG_X86_64
static int __init ioapic_insert_resources(void)
{
int i;
@@ -3293,4 +3893,4 @@ static int __init ioapic_insert_resource
/* Insert the IO APIC resources after PCI initialization has occured to handle
* IO APICS that are mapped in on a BAR in PCI space. */
late_initcall(ioapic_insert_resources);
-
+#endif
--
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