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-rw-r--r--arch/x86/kernel/acpi/boot.c442
-rw-r--r--arch/x86/kernel/acpi/processor.c6
-rw-r--r--arch/x86/kernel/acpi/realmode/wakeup.S38
-rw-r--r--arch/x86/kernel/acpi/realmode/wakeup.h5
-rw-r--r--arch/x86/kernel/acpi/sleep.c38
5 files changed, 499 insertions, 30 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 33c5216fd3e1..f489d7a9be92 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -37,6 +37,7 @@
#include <asm/pgtable.h>
#include <asm/io_apic.h>
#include <asm/apic.h>
+#include <asm/genapic.h>
#include <asm/io.h>
#include <asm/mpspec.h>
#include <asm/smp.h>
@@ -106,21 +107,6 @@ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
*/
enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PIC;
-#ifdef CONFIG_X86_64
-
-/* rely on all ACPI tables being in the direct mapping */
-char *__init __acpi_map_table(unsigned long phys_addr, unsigned long size)
-{
- if (!phys_addr || !size)
- return NULL;
-
- if (phys_addr+size <= (max_pfn_mapped << PAGE_SHIFT) + PAGE_SIZE)
- return __va(phys_addr);
-
- return NULL;
-}
-
-#else
/*
* Temporarily use the virtual area starting from FIX_IO_APIC_BASE_END,
@@ -139,11 +125,15 @@ char *__init __acpi_map_table(unsigned long phys, unsigned long size)
unsigned long base, offset, mapped_size;
int idx;
- if (phys + size < 8 * 1024 * 1024)
+ if (!phys || !size)
+ return NULL;
+
+ if (phys+size <= (max_low_pfn_mapped << PAGE_SHIFT))
return __va(phys);
offset = phys & (PAGE_SIZE - 1);
mapped_size = PAGE_SIZE - offset;
+ clear_fixmap(FIX_ACPI_END);
set_fixmap(FIX_ACPI_END, phys);
base = fix_to_virt(FIX_ACPI_END);
@@ -155,13 +145,13 @@ char *__init __acpi_map_table(unsigned long phys, unsigned long size)
if (--idx < FIX_ACPI_BEGIN)
return NULL; /* cannot handle this */
phys += PAGE_SIZE;
+ clear_fixmap(idx);
set_fixmap(idx, phys);
mapped_size += PAGE_SIZE;
}
return ((unsigned char *)base + offset);
}
-#endif
#ifdef CONFIG_PCI_MMCONFIG
/* The physical address of the MMCONFIG aperture. Set from ACPI tables. */
@@ -338,8 +328,6 @@ acpi_parse_lapic_nmi(struct acpi_subtable_header * header, const unsigned long e
#ifdef CONFIG_X86_IO_APIC
-struct mp_ioapic_routing mp_ioapic_routing[MAX_IO_APICS];
-
static int __init
acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end)
{
@@ -514,8 +502,6 @@ int acpi_register_gsi(u32 gsi, int triggering, int polarity)
* Make sure all (legacy) PCI IRQs are set as level-triggered.
*/
if (acpi_irq_model == ACPI_IRQ_MODEL_PIC) {
- extern void eisa_set_level_irq(unsigned int irq);
-
if (triggering == ACPI_LEVEL_SENSITIVE)
eisa_set_level_irq(gsi);
}
@@ -860,6 +846,364 @@ static int __init acpi_parse_madt_lapic_entries(void)
#endif /* CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_IO_APIC
+#define MP_ISA_BUS 0
+
+#ifdef CONFIG_X86_ES7000
+extern int es7000_plat;
+#endif
+
+static struct {
+ int apic_id;
+ int gsi_base;
+ int gsi_end;
+ DECLARE_BITMAP(pin_programmed, MP_MAX_IOAPIC_PIN + 1);
+} mp_ioapic_routing[MAX_IO_APICS];
+
+static int mp_find_ioapic(int gsi)
+{
+ int i = 0;
+
+ /* Find the IOAPIC that manages this GSI. */
+ for (i = 0; i < nr_ioapics; i++) {
+ if ((gsi >= mp_ioapic_routing[i].gsi_base)
+ && (gsi <= mp_ioapic_routing[i].gsi_end))
+ return i;
+ }
+
+ printk(KERN_ERR "ERROR: Unable to locate IOAPIC for GSI %d\n", gsi);
+ return -1;
+}
+
+static u8 __init uniq_ioapic_id(u8 id)
+{
+#ifdef CONFIG_X86_32
+ if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
+ !APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
+ return io_apic_get_unique_id(nr_ioapics, id);
+ else
+ return id;
+#else
+ int i;
+ DECLARE_BITMAP(used, 256);
+ bitmap_zero(used, 256);
+ for (i = 0; i < nr_ioapics; i++) {
+ struct mp_config_ioapic *ia = &mp_ioapics[i];
+ __set_bit(ia->mp_apicid, used);
+ }
+ if (!test_bit(id, used))
+ return id;
+ return find_first_zero_bit(used, 256);
+#endif
+}
+
+static int bad_ioapic(unsigned long address)
+{
+ if (nr_ioapics >= MAX_IO_APICS) {
+ printk(KERN_ERR "ERROR: Max # of I/O APICs (%d) exceeded "
+ "(found %d)\n", MAX_IO_APICS, nr_ioapics);
+ panic("Recompile kernel with bigger MAX_IO_APICS!\n");
+ }
+ if (!address) {
+ printk(KERN_ERR "WARNING: Bogus (zero) I/O APIC address"
+ " found in table, skipping!\n");
+ return 1;
+ }
+ return 0;
+}
+
+void __init mp_register_ioapic(int id, u32 address, u32 gsi_base)
+{
+ int idx = 0;
+
+ if (bad_ioapic(address))
+ return;
+
+ idx = nr_ioapics;
+
+ mp_ioapics[idx].mp_type = MP_IOAPIC;
+ mp_ioapics[idx].mp_flags = MPC_APIC_USABLE;
+ mp_ioapics[idx].mp_apicaddr = address;
+
+ set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address);
+ mp_ioapics[idx].mp_apicid = uniq_ioapic_id(id);
+#ifdef CONFIG_X86_32
+ mp_ioapics[idx].mp_apicver = io_apic_get_version(idx);
+#else
+ mp_ioapics[idx].mp_apicver = 0;
+#endif
+ /*
+ * Build basic GSI lookup table to facilitate gsi->io_apic lookups
+ * and to prevent reprogramming of IOAPIC pins (PCI GSIs).
+ */
+ mp_ioapic_routing[idx].apic_id = mp_ioapics[idx].mp_apicid;
+ mp_ioapic_routing[idx].gsi_base = gsi_base;
+ mp_ioapic_routing[idx].gsi_end = gsi_base +
+ io_apic_get_redir_entries(idx);
+
+ printk(KERN_INFO "IOAPIC[%d]: apic_id %d, version %d, address 0x%lx, "
+ "GSI %d-%d\n", idx, mp_ioapics[idx].mp_apicid,
+ mp_ioapics[idx].mp_apicver, mp_ioapics[idx].mp_apicaddr,
+ mp_ioapic_routing[idx].gsi_base, mp_ioapic_routing[idx].gsi_end);
+
+ nr_ioapics++;
+}
+
+static void assign_to_mp_irq(struct mp_config_intsrc *m,
+ struct mp_config_intsrc *mp_irq)
+{
+ memcpy(mp_irq, m, sizeof(struct mp_config_intsrc));
+}
+
+static int mp_irq_cmp(struct mp_config_intsrc *mp_irq,
+ struct mp_config_intsrc *m)
+{
+ return memcmp(mp_irq, m, sizeof(struct mp_config_intsrc));
+}
+
+static void save_mp_irq(struct mp_config_intsrc *m)
+{
+ int i;
+
+ for (i = 0; i < mp_irq_entries; i++) {
+ if (!mp_irq_cmp(&mp_irqs[i], m))
+ return;
+ }
+
+ assign_to_mp_irq(m, &mp_irqs[mp_irq_entries]);
+ if (++mp_irq_entries == MAX_IRQ_SOURCES)
+ panic("Max # of irq sources exceeded!!\n");
+}
+
+void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger, u32 gsi)
+{
+ int ioapic;
+ int pin;
+ struct mp_config_intsrc mp_irq;
+
+ /*
+ * Convert 'gsi' to 'ioapic.pin'.
+ */
+ ioapic = mp_find_ioapic(gsi);
+ if (ioapic < 0)
+ return;
+ pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
+
+ /*
+ * TBD: This check is for faulty timer entries, where the override
+ * erroneously sets the trigger to level, resulting in a HUGE
+ * increase of timer interrupts!
+ */
+ if ((bus_irq == 0) && (trigger == 3))
+ trigger = 1;
+
+ mp_irq.mp_type = MP_INTSRC;
+ mp_irq.mp_irqtype = mp_INT;
+ mp_irq.mp_irqflag = (trigger << 2) | polarity;
+ mp_irq.mp_srcbus = MP_ISA_BUS;
+ mp_irq.mp_srcbusirq = bus_irq; /* IRQ */
+ mp_irq.mp_dstapic = mp_ioapics[ioapic].mp_apicid; /* APIC ID */
+ mp_irq.mp_dstirq = pin; /* INTIN# */
+
+ save_mp_irq(&mp_irq);
+}
+
+void __init mp_config_acpi_legacy_irqs(void)
+{
+ int i;
+ int ioapic;
+ unsigned int dstapic;
+ struct mp_config_intsrc mp_irq;
+
+#if defined (CONFIG_MCA) || defined (CONFIG_EISA)
+ /*
+ * Fabricate the legacy ISA bus (bus #31).
+ */
+ mp_bus_id_to_type[MP_ISA_BUS] = MP_BUS_ISA;
+#endif
+ set_bit(MP_ISA_BUS, mp_bus_not_pci);
+ Dprintk("Bus #%d is ISA\n", MP_ISA_BUS);
+
+#ifdef CONFIG_X86_ES7000
+ /*
+ * Older generations of ES7000 have no legacy identity mappings
+ */
+ if (es7000_plat == 1)
+ return;
+#endif
+
+ /*
+ * Locate the IOAPIC that manages the ISA IRQs (0-15).
+ */
+ ioapic = mp_find_ioapic(0);
+ if (ioapic < 0)
+ return;
+ dstapic = mp_ioapics[ioapic].mp_apicid;
+
+ /*
+ * Use the default configuration for the IRQs 0-15. Unless
+ * overridden by (MADT) interrupt source override entries.
+ */
+ for (i = 0; i < 16; i++) {
+ int idx;
+
+ for (idx = 0; idx < mp_irq_entries; idx++) {
+ struct mp_config_intsrc *irq = mp_irqs + idx;
+
+ /* Do we already have a mapping for this ISA IRQ? */
+ if (irq->mp_srcbus == MP_ISA_BUS
+ && irq->mp_srcbusirq == i)
+ break;
+
+ /* Do we already have a mapping for this IOAPIC pin */
+ if (irq->mp_dstapic == dstapic &&
+ irq->mp_dstirq == i)
+ break;
+ }
+
+ if (idx != mp_irq_entries) {
+ printk(KERN_DEBUG "ACPI: IRQ%d used by override.\n", i);
+ continue; /* IRQ already used */
+ }
+
+ mp_irq.mp_type = MP_INTSRC;
+ mp_irq.mp_irqflag = 0; /* Conforming */
+ mp_irq.mp_srcbus = MP_ISA_BUS;
+ mp_irq.mp_dstapic = dstapic;
+ mp_irq.mp_irqtype = mp_INT;
+ mp_irq.mp_srcbusirq = i; /* Identity mapped */
+ mp_irq.mp_dstirq = i;
+
+ save_mp_irq(&mp_irq);
+ }
+}
+
+int mp_register_gsi(u32 gsi, int triggering, int polarity)
+{
+ int ioapic;
+ int ioapic_pin;
+#ifdef CONFIG_X86_32
+#define MAX_GSI_NUM 4096
+#define IRQ_COMPRESSION_START 64
+
+ static int pci_irq = IRQ_COMPRESSION_START;
+ /*
+ * Mapping between Global System Interrupts, which
+ * represent all possible interrupts, and IRQs
+ * assigned to actual devices.
+ */
+ static int gsi_to_irq[MAX_GSI_NUM];
+#else
+
+ if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC)
+ return gsi;
+#endif
+
+ /* Don't set up the ACPI SCI because it's already set up */
+ if (acpi_gbl_FADT.sci_interrupt == gsi)
+ return gsi;
+
+ ioapic = mp_find_ioapic(gsi);
+ if (ioapic < 0) {
+ printk(KERN_WARNING "No IOAPIC for GSI %u\n", gsi);
+ return gsi;
+ }
+
+ ioapic_pin = gsi - mp_ioapic_routing[ioapic].gsi_base;
+
+#ifdef CONFIG_X86_32
+ if (ioapic_renumber_irq)
+ gsi = ioapic_renumber_irq(ioapic, gsi);
+#endif
+
+ /*
+ * Avoid pin reprogramming. PRTs typically include entries
+ * with redundant pin->gsi mappings (but unique PCI devices);
+ * we only program the IOAPIC on the first.
+ */
+ if (ioapic_pin > MP_MAX_IOAPIC_PIN) {
+ printk(KERN_ERR "Invalid reference to IOAPIC pin "
+ "%d-%d\n", mp_ioapic_routing[ioapic].apic_id,
+ ioapic_pin);
+ return gsi;
+ }
+ if (test_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed)) {
+ Dprintk(KERN_DEBUG "Pin %d-%d already programmed\n",
+ mp_ioapic_routing[ioapic].apic_id, ioapic_pin);
+#ifdef CONFIG_X86_32
+ return (gsi < IRQ_COMPRESSION_START ? gsi : gsi_to_irq[gsi]);
+#else
+ return gsi;
+#endif
+ }
+
+ set_bit(ioapic_pin, mp_ioapic_routing[ioapic].pin_programmed);
+#ifdef CONFIG_X86_32
+ /*
+ * For GSI >= 64, use IRQ compression
+ */
+ if ((gsi >= IRQ_COMPRESSION_START)
+ && (triggering == ACPI_LEVEL_SENSITIVE)) {
+ /*
+ * For PCI devices assign IRQs in order, avoiding gaps
+ * due to unused I/O APIC pins.
+ */
+ int irq = gsi;
+ if (gsi < MAX_GSI_NUM) {
+ /*
+ * Retain the VIA chipset work-around (gsi > 15), but
+ * avoid a problem where the 8254 timer (IRQ0) is setup
+ * via an override (so it's not on pin 0 of the ioapic),
+ * and at the same time, the pin 0 interrupt is a PCI
+ * type. The gsi > 15 test could cause these two pins
+ * to be shared as IRQ0, and they are not shareable.
+ * So test for this condition, and if necessary, avoid
+ * the pin collision.
+ */
+ gsi = pci_irq++;
+ /*
+ * Don't assign IRQ used by ACPI SCI
+ */
+ if (gsi == acpi_gbl_FADT.sci_interrupt)
+ gsi = pci_irq++;
+ gsi_to_irq[irq] = gsi;
+ } else {
+ printk(KERN_ERR "GSI %u is too high\n", gsi);
+ return gsi;
+ }
+ }
+#endif
+ io_apic_set_pci_routing(ioapic, ioapic_pin, gsi,
+ triggering == ACPI_EDGE_SENSITIVE ? 0 : 1,
+ polarity == ACPI_ACTIVE_HIGH ? 0 : 1);
+ return gsi;
+}
+
+int mp_config_acpi_gsi(unsigned char number, unsigned int devfn, u8 pin,
+ u32 gsi, int triggering, int polarity)
+{
+#ifdef CONFIG_X86_MPPARSE
+ struct mp_config_intsrc mp_irq;
+ int ioapic;
+
+ if (!acpi_ioapic)
+ return 0;
+
+ /* print the entry should happen on mptable identically */
+ mp_irq.mp_type = MP_INTSRC;
+ mp_irq.mp_irqtype = mp_INT;
+ mp_irq.mp_irqflag = (triggering == ACPI_EDGE_SENSITIVE ? 4 : 0x0c) |
+ (polarity == ACPI_ACTIVE_HIGH ? 1 : 3);
+ mp_irq.mp_srcbus = number;
+ mp_irq.mp_srcbusirq = (((devfn >> 3) & 0x1f) << 2) | ((pin - 1) & 3);
+ ioapic = mp_find_ioapic(gsi);
+ mp_irq.mp_dstapic = mp_ioapic_routing[ioapic].apic_id;
+ mp_irq.mp_dstirq = gsi - mp_ioapic_routing[ioapic].gsi_base;
+
+ save_mp_irq(&mp_irq);
+#endif
+ return 0;
+}
+
/*
* Parse IOAPIC related entries in MADT
* returns 0 on success, < 0 on error
@@ -1009,8 +1353,6 @@ static void __init acpi_process_madt(void)
return;
}
-#ifdef __i386__
-
static int __init disable_acpi_irq(const struct dmi_system_id *d)
{
if (!acpi_force) {
@@ -1061,6 +1403,16 @@ static int __init force_acpi_ht(const struct dmi_system_id *d)
}
/*
+ * Force ignoring BIOS IRQ0 pin2 override
+ */
+static int __init dmi_ignore_irq0_timer_override(const struct dmi_system_id *d)
+{
+ pr_notice("%s detected: Ignoring BIOS IRQ0 pin2 override\n", d->ident);
+ acpi_skip_timer_override = 1;
+ return 0;
+}
+
+/*
* If your system is blacklisted here, but you find that acpi=force
* works for you, please contact acpi-devel@sourceforge.net
*/
@@ -1227,11 +1579,35 @@ static struct dmi_system_id __initdata acpi_dmi_table[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
},
},
+ /*
+ * HP laptops which use a DSDT reporting as HP/SB400/10000,
+ * which includes some code which overrides all temperature
+ * trip points to 16C if the INTIN2 input of the I/O APIC
+ * is enabled. This input is incorrectly designated the
+ * ISA IRQ 0 via an interrupt source override even though
+ * it is wired to the output of the master 8259A and INTIN0
+ * is not connected at all. Force ignoring BIOS IRQ0 pin2
+ * override in that cases.
+ */
+ {
+ .callback = dmi_ignore_irq0_timer_override,
+ .ident = "HP NX6125 laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6125"),
+ },
+ },
+ {
+ .callback = dmi_ignore_irq0_timer_override,
+ .ident = "HP NX6325 laptop",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6325"),
+ },
+ },
{}
};
-#endif /* __i386__ */
-
/*
* acpi_boot_table_init() and acpi_boot_init()
* called from setup_arch(), always.
@@ -1259,9 +1635,7 @@ int __init acpi_boot_table_init(void)
{
int error;
-#ifdef __i386__
dmi_check_system(acpi_dmi_table);
-#endif
/*
* If acpi_disabled, bail out
@@ -1386,6 +1760,20 @@ static int __init parse_pci(char *arg)
}
early_param("pci", parse_pci);
+int __init acpi_mps_check(void)
+{
+#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
+/* mptable code is not built-in*/
+ if (acpi_disabled || acpi_noirq) {
+ printk(KERN_WARNING "MPS support code is not built-in.\n"
+ "Using acpi=off or acpi=noirq or pci=noacpi "
+ "may have problem\n");
+ return 1;
+ }
+#endif
+ return 0;
+}
+
#ifdef CONFIG_X86_IO_APIC
static int __init parse_acpi_skip_timer_override(char *arg)
{
diff --git a/arch/x86/kernel/acpi/processor.c b/arch/x86/kernel/acpi/processor.c
index de2d2e4ebad9..7c074eec39fb 100644
--- a/arch/x86/kernel/acpi/processor.c
+++ b/arch/x86/kernel/acpi/processor.c
@@ -56,6 +56,12 @@ static void init_intel_pdc(struct acpi_processor *pr, struct cpuinfo_x86 *c)
if (cpu_has(c, X86_FEATURE_ACPI))
buf[2] |= ACPI_PDC_T_FFH;
+ /*
+ * If mwait/monitor is unsupported, C2/C3_FFH will be disabled
+ */
+ if (!cpu_has(c, X86_FEATURE_MWAIT))
+ buf[2] &= ~(ACPI_PDC_C_C2C3_FFH);
+
obj->type = ACPI_TYPE_BUFFER;
obj->buffer.length = 12;
obj->buffer.pointer = (u8 *) buf;
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.S b/arch/x86/kernel/acpi/realmode/wakeup.S
index f9b77fb37e5b..3355973b12ac 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.S
+++ b/arch/x86/kernel/acpi/realmode/wakeup.S
@@ -5,6 +5,7 @@
#include <asm/msr-index.h>
#include <asm/page.h>
#include <asm/pgtable.h>
+#include <asm/processor-flags.h>
.code16
.section ".header", "a"
@@ -24,6 +25,11 @@ pmode_gdt: .quad 0
realmode_flags: .long 0
real_magic: .long 0
trampoline_segment: .word 0
+_pad1: .byte 0
+wakeup_jmp: .byte 0xea /* ljmpw */
+wakeup_jmp_off: .word 3f
+wakeup_jmp_seg: .word 0
+wakeup_gdt: .quad 0, 0, 0
signature: .long 0x51ee1111
.text
@@ -34,11 +40,34 @@ _start:
cli
cld
+ /* Apparently some dimwit BIOS programmers don't know how to
+ program a PM to RM transition, and we might end up here with
+ junk in the data segment descriptor registers. The only way
+ to repair that is to go into PM and fix it ourselves... */
+ movw $16, %cx
+ lgdtl %cs:wakeup_gdt
+ movl %cr0, %eax
+ orb $X86_CR0_PE, %al
+ movl %eax, %cr0
+ jmp 1f
+1: ljmpw $8, $2f
+2:
+ movw %cx, %ds
+ movw %cx, %es
+ movw %cx, %ss
+ movw %cx, %fs
+ movw %cx, %gs
+
+ andb $~X86_CR0_PE, %al
+ movl %eax, %cr0
+ jmp wakeup_jmp
+3:
/* Set up segments */
movw %cs, %ax
movw %ax, %ds
movw %ax, %es
movw %ax, %ss
+ lidtl wakeup_idt
movl $wakeup_stack_end, %esp
@@ -98,7 +127,14 @@ bogus_real_magic:
jmp 1b
.data
- .balign 4
+ .balign 8
+
+ /* This is the standard real-mode IDT */
+wakeup_idt:
+ .word 0xffff /* limit */
+ .long 0 /* address */
+ .word 0
+
.globl HEAP, heap_end
HEAP:
.long wakeup_heap
diff --git a/arch/x86/kernel/acpi/realmode/wakeup.h b/arch/x86/kernel/acpi/realmode/wakeup.h
index ef8166fe8020..69d38d0b2b64 100644
--- a/arch/x86/kernel/acpi/realmode/wakeup.h
+++ b/arch/x86/kernel/acpi/realmode/wakeup.h
@@ -24,6 +24,11 @@ struct wakeup_header {
u32 realmode_flags;
u32 real_magic;
u16 trampoline_segment; /* segment with trampoline code, 64-bit only */
+ u8 _pad1;
+ u8 wakeup_jmp;
+ u16 wakeup_jmp_off;
+ u16 wakeup_jmp_seg;
+ u64 wakeup_gdt[3];
u32 signature; /* To check we have correct structure */
} __attribute__((__packed__));
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 882e970032d5..868de3d5c39d 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -23,6 +23,15 @@ static unsigned long acpi_realmode;
static char temp_stack[10240];
#endif
+/* XXX: this macro should move to asm-x86/segment.h and be shared with the
+ boot code... */
+#define GDT_ENTRY(flags, base, limit) \
+ (((u64)(base & 0xff000000) << 32) | \
+ ((u64)flags << 40) | \
+ ((u64)(limit & 0x00ff0000) << 32) | \
+ ((u64)(base & 0x00ffffff) << 16) | \
+ ((u64)(limit & 0x0000ffff)))
+
/**
* acpi_save_state_mem - save kernel state
*
@@ -50,6 +59,29 @@ int acpi_save_state_mem(void)
header->video_mode = saved_video_mode;
+ header->wakeup_jmp_seg = acpi_wakeup_address >> 4;
+
+ /*
+ * Set up the wakeup GDT. We set these up as Big Real Mode,
+ * that is, with limits set to 4 GB. At least the Lenovo
+ * Thinkpad X61 is known to need this for the video BIOS
+ * initialization quirk to work; this is likely to also
+ * be the case for other laptops or integrated video devices.
+ */
+
+ /* GDT[0]: GDT self-pointer */
+ header->wakeup_gdt[0] =
+ (u64)(sizeof(header->wakeup_gdt) - 1) +
+ ((u64)(acpi_wakeup_address +
+ ((char *)&header->wakeup_gdt - (char *)acpi_realmode))
+ << 16);
+ /* GDT[1]: big real mode-like code segment */
+ header->wakeup_gdt[1] =
+ GDT_ENTRY(0x809b, acpi_wakeup_address, 0xfffff);
+ /* GDT[2]: big real mode-like data segment */
+ header->wakeup_gdt[2] =
+ GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
+
#ifndef CONFIG_64BIT
store_gdt((struct desc_ptr *)&header->pmode_gdt);
@@ -72,7 +104,9 @@ int acpi_save_state_mem(void)
saved_magic = 0x12345678;
#else /* CONFIG_64BIT */
header->trampoline_segment = setup_trampoline() >> 4;
- init_rsp = (unsigned long)temp_stack + 4096;
+#ifdef CONFIG_SMP
+ stack_start.sp = temp_stack + 4096;
+#endif
initial_code = (unsigned long)wakeup_long64;
saved_magic = 0x123456789abcdef0;
#endif /* CONFIG_64BIT */
@@ -111,7 +145,7 @@ void __init acpi_reserve_bootmem(void)
return;
}
- acpi_wakeup_address = acpi_realmode;
+ acpi_wakeup_address = virt_to_phys((void *)acpi_realmode);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 18:47:00 +0000