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Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/mpparse.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/kernel/mpparse.c921
1 files changed, 0 insertions, 921 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/mpparse.c b/ANDROID_3.4.5/arch/x86/kernel/mpparse.c
deleted file mode 100644
index ca470e4c..00000000
--- a/ANDROID_3.4.5/arch/x86/kernel/mpparse.c
+++ /dev/null
@@ -1,921 +0,0 @@
-/*
- * Intel Multiprocessor Specification 1.1 and 1.4
- * compliant MP-table parsing routines.
- *
- * (c) 1995 Alan Cox, Building #3 <alan@lxorguk.ukuu.org.uk>
- * (c) 1998, 1999, 2000, 2009 Ingo Molnar <mingo@redhat.com>
- * (c) 2008 Alexey Starikovskiy <astarikovskiy@suse.de>
- */
-
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/bootmem.h>
-#include <linux/memblock.h>
-#include <linux/kernel_stat.h>
-#include <linux/mc146818rtc.h>
-#include <linux/bitops.h>
-#include <linux/acpi.h>
-#include <linux/module.h>
-#include <linux/smp.h>
-#include <linux/pci.h>
-
-#include <asm/mtrr.h>
-#include <asm/mpspec.h>
-#include <asm/pgalloc.h>
-#include <asm/io_apic.h>
-#include <asm/proto.h>
-#include <asm/bios_ebda.h>
-#include <asm/e820.h>
-#include <asm/trampoline.h>
-#include <asm/setup.h>
-#include <asm/smp.h>
-
-#include <asm/apic.h>
-/*
- * Checksum an MP configuration block.
- */
-
-static int __init mpf_checksum(unsigned char *mp, int len)
-{
- int sum = 0;
-
- while (len--)
- sum += *mp++;
-
- return sum & 0xFF;
-}
-
-int __init default_mpc_apic_id(struct mpc_cpu *m)
-{
- return m->apicid;
-}
-
-static void __init MP_processor_info(struct mpc_cpu *m)
-{
- int apicid;
- char *bootup_cpu = "";
-
- if (!(m->cpuflag & CPU_ENABLED)) {
- disabled_cpus++;
- return;
- }
-
- apicid = x86_init.mpparse.mpc_apic_id(m);
-
- if (m->cpuflag & CPU_BOOTPROCESSOR) {
- bootup_cpu = " (Bootup-CPU)";
- boot_cpu_physical_apicid = m->apicid;
- }
-
- printk(KERN_INFO "Processor #%d%s\n", m->apicid, bootup_cpu);
- generic_processor_info(apicid, m->apicver);
-}
-
-#ifdef CONFIG_X86_IO_APIC
-void __init default_mpc_oem_bus_info(struct mpc_bus *m, char *str)
-{
- memcpy(str, m->bustype, 6);
- str[6] = 0;
- apic_printk(APIC_VERBOSE, "Bus #%d is %s\n", m->busid, str);
-}
-
-static void __init MP_bus_info(struct mpc_bus *m)
-{
- char str[7];
-
- x86_init.mpparse.mpc_oem_bus_info(m, str);
-
-#if MAX_MP_BUSSES < 256
- if (m->busid >= MAX_MP_BUSSES) {
- printk(KERN_WARNING "MP table busid value (%d) for bustype %s "
- " is too large, max. supported is %d\n",
- m->busid, str, MAX_MP_BUSSES - 1);
- return;
- }
-#endif
-
- set_bit(m->busid, mp_bus_not_pci);
- if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
-#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
- mp_bus_id_to_type[m->busid] = MP_BUS_ISA;
-#endif
- } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
- if (x86_init.mpparse.mpc_oem_pci_bus)
- x86_init.mpparse.mpc_oem_pci_bus(m);
-
- clear_bit(m->busid, mp_bus_not_pci);
-#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
- mp_bus_id_to_type[m->busid] = MP_BUS_PCI;
- } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
- mp_bus_id_to_type[m->busid] = MP_BUS_EISA;
- } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) {
- mp_bus_id_to_type[m->busid] = MP_BUS_MCA;
-#endif
- } else
- printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
-}
-
-static void __init MP_ioapic_info(struct mpc_ioapic *m)
-{
- if (m->flags & MPC_APIC_USABLE)
- mp_register_ioapic(m->apicid, m->apicaddr, gsi_top);
-}
-
-static void __init print_mp_irq_info(struct mpc_intsrc *mp_irq)
-{
- apic_printk(APIC_VERBOSE, "Int: type %d, pol %d, trig %d, bus %02x,"
- " IRQ %02x, APIC ID %x, APIC INT %02x\n",
- mp_irq->irqtype, mp_irq->irqflag & 3,
- (mp_irq->irqflag >> 2) & 3, mp_irq->srcbus,
- mp_irq->srcbusirq, mp_irq->dstapic, mp_irq->dstirq);
-}
-
-#else /* CONFIG_X86_IO_APIC */
-static inline void __init MP_bus_info(struct mpc_bus *m) {}
-static inline void __init MP_ioapic_info(struct mpc_ioapic *m) {}
-#endif /* CONFIG_X86_IO_APIC */
-
-static void __init MP_lintsrc_info(struct mpc_lintsrc *m)
-{
- apic_printk(APIC_VERBOSE, "Lint: type %d, pol %d, trig %d, bus %02x,"
- " IRQ %02x, APIC ID %x, APIC LINT %02x\n",
- m->irqtype, m->irqflag & 3, (m->irqflag >> 2) & 3, m->srcbusid,
- m->srcbusirq, m->destapic, m->destapiclint);
-}
-
-/*
- * Read/parse the MPC
- */
-static int __init smp_check_mpc(struct mpc_table *mpc, char *oem, char *str)
-{
-
- if (memcmp(mpc->signature, MPC_SIGNATURE, 4)) {
- printk(KERN_ERR "MPTABLE: bad signature [%c%c%c%c]!\n",
- mpc->signature[0], mpc->signature[1],
- mpc->signature[2], mpc->signature[3]);
- return 0;
- }
- if (mpf_checksum((unsigned char *)mpc, mpc->length)) {
- printk(KERN_ERR "MPTABLE: checksum error!\n");
- return 0;
- }
- if (mpc->spec != 0x01 && mpc->spec != 0x04) {
- printk(KERN_ERR "MPTABLE: bad table version (%d)!!\n",
- mpc->spec);
- return 0;
- }
- if (!mpc->lapic) {
- printk(KERN_ERR "MPTABLE: null local APIC address!\n");
- return 0;
- }
- memcpy(oem, mpc->oem, 8);
- oem[8] = 0;
- printk(KERN_INFO "MPTABLE: OEM ID: %s\n", oem);
-
- memcpy(str, mpc->productid, 12);
- str[12] = 0;
-
- printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
-
- printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->lapic);
-
- return 1;
-}
-
-static void skip_entry(unsigned char **ptr, int *count, int size)
-{
- *ptr += size;
- *count += size;
-}
-
-static void __init smp_dump_mptable(struct mpc_table *mpc, unsigned char *mpt)
-{
- printk(KERN_ERR "Your mptable is wrong, contact your HW vendor!\n"
- "type %x\n", *mpt);
- print_hex_dump(KERN_ERR, " ", DUMP_PREFIX_ADDRESS, 16,
- 1, mpc, mpc->length, 1);
-}
-
-void __init default_smp_read_mpc_oem(struct mpc_table *mpc) { }
-
-static int __init smp_read_mpc(struct mpc_table *mpc, unsigned early)
-{
- char str[16];
- char oem[10];
-
- int count = sizeof(*mpc);
- unsigned char *mpt = ((unsigned char *)mpc) + count;
-
- if (!smp_check_mpc(mpc, oem, str))
- return 0;
-
-#ifdef CONFIG_X86_32
- generic_mps_oem_check(mpc, oem, str);
-#endif
- /* Initialize the lapic mapping */
- if (!acpi_lapic)
- register_lapic_address(mpc->lapic);
-
- if (early)
- return 1;
-
- if (mpc->oemptr)
- x86_init.mpparse.smp_read_mpc_oem(mpc);
-
- /*
- * Now process the configuration blocks.
- */
- x86_init.mpparse.mpc_record(0);
-
- while (count < mpc->length) {
- switch (*mpt) {
- case MP_PROCESSOR:
- /* ACPI may have already provided this data */
- if (!acpi_lapic)
- MP_processor_info((struct mpc_cpu *)mpt);
- skip_entry(&mpt, &count, sizeof(struct mpc_cpu));
- break;
- case MP_BUS:
- MP_bus_info((struct mpc_bus *)mpt);
- skip_entry(&mpt, &count, sizeof(struct mpc_bus));
- break;
- case MP_IOAPIC:
- MP_ioapic_info((struct mpc_ioapic *)mpt);
- skip_entry(&mpt, &count, sizeof(struct mpc_ioapic));
- break;
- case MP_INTSRC:
- mp_save_irq((struct mpc_intsrc *)mpt);
- skip_entry(&mpt, &count, sizeof(struct mpc_intsrc));
- break;
- case MP_LINTSRC:
- MP_lintsrc_info((struct mpc_lintsrc *)mpt);
- skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc));
- break;
- default:
- /* wrong mptable */
- smp_dump_mptable(mpc, mpt);
- count = mpc->length;
- break;
- }
- x86_init.mpparse.mpc_record(1);
- }
-
- if (!num_processors)
- printk(KERN_ERR "MPTABLE: no processors registered!\n");
- return num_processors;
-}
-
-#ifdef CONFIG_X86_IO_APIC
-
-static int __init ELCR_trigger(unsigned int irq)
-{
- unsigned int port;
-
- port = 0x4d0 + (irq >> 3);
- return (inb(port) >> (irq & 7)) & 1;
-}
-
-static void __init construct_default_ioirq_mptable(int mpc_default_type)
-{
- struct mpc_intsrc intsrc;
- int i;
- int ELCR_fallback = 0;
-
- intsrc.type = MP_INTSRC;
- intsrc.irqflag = 0; /* conforming */
- intsrc.srcbus = 0;
- intsrc.dstapic = mpc_ioapic_id(0);
-
- intsrc.irqtype = mp_INT;
-
- /*
- * If true, we have an ISA/PCI system with no IRQ entries
- * in the MP table. To prevent the PCI interrupts from being set up
- * incorrectly, we try to use the ELCR. The sanity check to see if
- * there is good ELCR data is very simple - IRQ0, 1, 2 and 13 can
- * never be level sensitive, so we simply see if the ELCR agrees.
- * If it does, we assume it's valid.
- */
- if (mpc_default_type == 5) {
- printk(KERN_INFO "ISA/PCI bus type with no IRQ information... "
- "falling back to ELCR\n");
-
- if (ELCR_trigger(0) || ELCR_trigger(1) || ELCR_trigger(2) ||
- ELCR_trigger(13))
- printk(KERN_ERR "ELCR contains invalid data... "
- "not using ELCR\n");
- else {
- printk(KERN_INFO
- "Using ELCR to identify PCI interrupts\n");
- ELCR_fallback = 1;
- }
- }
-
- for (i = 0; i < 16; i++) {
- switch (mpc_default_type) {
- case 2:
- if (i == 0 || i == 13)
- continue; /* IRQ0 & IRQ13 not connected */
- /* fall through */
- default:
- if (i == 2)
- continue; /* IRQ2 is never connected */
- }
-
- if (ELCR_fallback) {
- /*
- * If the ELCR indicates a level-sensitive interrupt, we
- * copy that information over to the MP table in the
- * irqflag field (level sensitive, active high polarity).
- */
- if (ELCR_trigger(i))
- intsrc.irqflag = 13;
- else
- intsrc.irqflag = 0;
- }
-
- intsrc.srcbusirq = i;
- intsrc.dstirq = i ? i : 2; /* IRQ0 to INTIN2 */
- mp_save_irq(&intsrc);
- }
-
- intsrc.irqtype = mp_ExtINT;
- intsrc.srcbusirq = 0;
- intsrc.dstirq = 0; /* 8259A to INTIN0 */
- mp_save_irq(&intsrc);
-}
-
-
-static void __init construct_ioapic_table(int mpc_default_type)
-{
- struct mpc_ioapic ioapic;
- struct mpc_bus bus;
-
- bus.type = MP_BUS;
- bus.busid = 0;
- switch (mpc_default_type) {
- default:
- printk(KERN_ERR "???\nUnknown standard configuration %d\n",
- mpc_default_type);
- /* fall through */
- case 1:
- case 5:
- memcpy(bus.bustype, "ISA ", 6);
- break;
- case 2:
- case 6:
- case 3:
- memcpy(bus.bustype, "EISA ", 6);
- break;
- case 4:
- case 7:
- memcpy(bus.bustype, "MCA ", 6);
- }
- MP_bus_info(&bus);
- if (mpc_default_type > 4) {
- bus.busid = 1;
- memcpy(bus.bustype, "PCI ", 6);
- MP_bus_info(&bus);
- }
-
- ioapic.type = MP_IOAPIC;
- ioapic.apicid = 2;
- ioapic.apicver = mpc_default_type > 4 ? 0x10 : 0x01;
- ioapic.flags = MPC_APIC_USABLE;
- ioapic.apicaddr = IO_APIC_DEFAULT_PHYS_BASE;
- MP_ioapic_info(&ioapic);
-
- /*
- * We set up most of the low 16 IO-APIC pins according to MPS rules.
- */
- construct_default_ioirq_mptable(mpc_default_type);
-}
-#else
-static inline void __init construct_ioapic_table(int mpc_default_type) { }
-#endif
-
-static inline void __init construct_default_ISA_mptable(int mpc_default_type)
-{
- struct mpc_cpu processor;
- struct mpc_lintsrc lintsrc;
- int linttypes[2] = { mp_ExtINT, mp_NMI };
- int i;
-
- /*
- * local APIC has default address
- */
- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
-
- /*
- * 2 CPUs, numbered 0 & 1.
- */
- processor.type = MP_PROCESSOR;
- /* Either an integrated APIC or a discrete 82489DX. */
- processor.apicver = mpc_default_type > 4 ? 0x10 : 0x01;
- processor.cpuflag = CPU_ENABLED;
- processor.cpufeature = (boot_cpu_data.x86 << 8) |
- (boot_cpu_data.x86_model << 4) | boot_cpu_data.x86_mask;
- processor.featureflag = boot_cpu_data.x86_capability[0];
- processor.reserved[0] = 0;
- processor.reserved[1] = 0;
- for (i = 0; i < 2; i++) {
- processor.apicid = i;
- MP_processor_info(&processor);
- }
-
- construct_ioapic_table(mpc_default_type);
-
- lintsrc.type = MP_LINTSRC;
- lintsrc.irqflag = 0; /* conforming */
- lintsrc.srcbusid = 0;
- lintsrc.srcbusirq = 0;
- lintsrc.destapic = MP_APIC_ALL;
- for (i = 0; i < 2; i++) {
- lintsrc.irqtype = linttypes[i];
- lintsrc.destapiclint = i;
- MP_lintsrc_info(&lintsrc);
- }
-}
-
-static struct mpf_intel *mpf_found;
-
-static unsigned long __init get_mpc_size(unsigned long physptr)
-{
- struct mpc_table *mpc;
- unsigned long size;
-
- mpc = early_ioremap(physptr, PAGE_SIZE);
- size = mpc->length;
- early_iounmap(mpc, PAGE_SIZE);
- apic_printk(APIC_VERBOSE, " mpc: %lx-%lx\n", physptr, physptr + size);
-
- return size;
-}
-
-static int __init check_physptr(struct mpf_intel *mpf, unsigned int early)
-{
- struct mpc_table *mpc;
- unsigned long size;
-
- size = get_mpc_size(mpf->physptr);
- mpc = early_ioremap(mpf->physptr, size);
- /*
- * Read the physical hardware table. Anything here will
- * override the defaults.
- */
- if (!smp_read_mpc(mpc, early)) {
-#ifdef CONFIG_X86_LOCAL_APIC
- smp_found_config = 0;
-#endif
- printk(KERN_ERR "BIOS bug, MP table errors detected!...\n"
- "... disabling SMP support. (tell your hw vendor)\n");
- early_iounmap(mpc, size);
- return -1;
- }
- early_iounmap(mpc, size);
-
- if (early)
- return -1;
-
-#ifdef CONFIG_X86_IO_APIC
- /*
- * If there are no explicit MP IRQ entries, then we are
- * broken. We set up most of the low 16 IO-APIC pins to
- * ISA defaults and hope it will work.
- */
- if (!mp_irq_entries) {
- struct mpc_bus bus;
-
- printk(KERN_ERR "BIOS bug, no explicit IRQ entries, "
- "using default mptable. (tell your hw vendor)\n");
-
- bus.type = MP_BUS;
- bus.busid = 0;
- memcpy(bus.bustype, "ISA ", 6);
- MP_bus_info(&bus);
-
- construct_default_ioirq_mptable(0);
- }
-#endif
-
- return 0;
-}
-
-/*
- * Scan the memory blocks for an SMP configuration block.
- */
-void __init default_get_smp_config(unsigned int early)
-{
- struct mpf_intel *mpf = mpf_found;
-
- if (!mpf)
- return;
-
- if (acpi_lapic && early)
- return;
-
- /*
- * MPS doesn't support hyperthreading, aka only have
- * thread 0 apic id in MPS table
- */
- if (acpi_lapic && acpi_ioapic)
- return;
-
- printk(KERN_INFO "Intel MultiProcessor Specification v1.%d\n",
- mpf->specification);
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
- if (mpf->feature2 & (1 << 7)) {
- printk(KERN_INFO " IMCR and PIC compatibility mode.\n");
- pic_mode = 1;
- } else {
- printk(KERN_INFO " Virtual Wire compatibility mode.\n");
- pic_mode = 0;
- }
-#endif
- /*
- * Now see if we need to read further.
- */
- if (mpf->feature1 != 0) {
- if (early) {
- /*
- * local APIC has default address
- */
- mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
- return;
- }
-
- printk(KERN_INFO "Default MP configuration #%d\n",
- mpf->feature1);
- construct_default_ISA_mptable(mpf->feature1);
-
- } else if (mpf->physptr) {
- if (check_physptr(mpf, early))
- return;
- } else
- BUG();
-
- if (!early)
- printk(KERN_INFO "Processors: %d\n", num_processors);
- /*
- * Only use the first configuration found.
- */
-}
-
-static void __init smp_reserve_memory(struct mpf_intel *mpf)
-{
- memblock_reserve(mpf->physptr, get_mpc_size(mpf->physptr));
-}
-
-static int __init smp_scan_config(unsigned long base, unsigned long length)
-{
- unsigned int *bp = phys_to_virt(base);
- struct mpf_intel *mpf;
- unsigned long mem;
-
- apic_printk(APIC_VERBOSE, "Scan SMP from %p for %ld bytes.\n",
- bp, length);
- BUILD_BUG_ON(sizeof(*mpf) != 16);
-
- while (length > 0) {
- mpf = (struct mpf_intel *)bp;
- if ((*bp == SMP_MAGIC_IDENT) &&
- (mpf->length == 1) &&
- !mpf_checksum((unsigned char *)bp, 16) &&
- ((mpf->specification == 1)
- || (mpf->specification == 4))) {
-#ifdef CONFIG_X86_LOCAL_APIC
- smp_found_config = 1;
-#endif
- mpf_found = mpf;
-
- printk(KERN_INFO "found SMP MP-table at [%p] %llx\n",
- mpf, (u64)virt_to_phys(mpf));
-
- mem = virt_to_phys(mpf);
- memblock_reserve(mem, sizeof(*mpf));
- if (mpf->physptr)
- smp_reserve_memory(mpf);
-
- return 1;
- }
- bp += 4;
- length -= 16;
- }
- return 0;
-}
-
-void __init default_find_smp_config(void)
-{
- unsigned int address;
-
- /*
- * FIXME: Linux assumes you have 640K of base ram..
- * this continues the error...
- *
- * 1) Scan the bottom 1K for a signature
- * 2) Scan the top 1K of base RAM
- * 3) Scan the 64K of bios
- */
- if (smp_scan_config(0x0, 0x400) ||
- smp_scan_config(639 * 0x400, 0x400) ||
- smp_scan_config(0xF0000, 0x10000))
- return;
- /*
- * If it is an SMP machine we should know now, unless the
- * configuration is in an EISA/MCA bus machine with an
- * extended bios data area.
- *
- * there is a real-mode segmented pointer pointing to the
- * 4K EBDA area at 0x40E, calculate and scan it here.
- *
- * NOTE! There are Linux loaders that will corrupt the EBDA
- * area, and as such this kind of SMP config may be less
- * trustworthy, simply because the SMP table may have been
- * stomped on during early boot. These loaders are buggy and
- * should be fixed.
- *
- * MP1.4 SPEC states to only scan first 1K of 4K EBDA.
- */
-
- address = get_bios_ebda();
- if (address)
- smp_scan_config(address, 0x400);
-}
-
-#ifdef CONFIG_X86_IO_APIC
-static u8 __initdata irq_used[MAX_IRQ_SOURCES];
-
-static int __init get_MP_intsrc_index(struct mpc_intsrc *m)
-{
- int i;
-
- if (m->irqtype != mp_INT)
- return 0;
-
- if (m->irqflag != 0x0f)
- return 0;
-
- /* not legacy */
-
- for (i = 0; i < mp_irq_entries; i++) {
- if (mp_irqs[i].irqtype != mp_INT)
- continue;
-
- if (mp_irqs[i].irqflag != 0x0f)
- continue;
-
- if (mp_irqs[i].srcbus != m->srcbus)
- continue;
- if (mp_irqs[i].srcbusirq != m->srcbusirq)
- continue;
- if (irq_used[i]) {
- /* already claimed */
- return -2;
- }
- irq_used[i] = 1;
- return i;
- }
-
- /* not found */
- return -1;
-}
-
-#define SPARE_SLOT_NUM 20
-
-static struct mpc_intsrc __initdata *m_spare[SPARE_SLOT_NUM];
-
-static void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare)
-{
- int i;
-
- apic_printk(APIC_VERBOSE, "OLD ");
- print_mp_irq_info(m);
-
- i = get_MP_intsrc_index(m);
- if (i > 0) {
- memcpy(m, &mp_irqs[i], sizeof(*m));
- apic_printk(APIC_VERBOSE, "NEW ");
- print_mp_irq_info(&mp_irqs[i]);
- return;
- }
- if (!i) {
- /* legacy, do nothing */
- return;
- }
- if (*nr_m_spare < SPARE_SLOT_NUM) {
- /*
- * not found (-1), or duplicated (-2) are invalid entries,
- * we need to use the slot later
- */
- m_spare[*nr_m_spare] = m;
- *nr_m_spare += 1;
- }
-}
-
-static int __init
-check_slot(unsigned long mpc_new_phys, unsigned long mpc_new_length, int count)
-{
- if (!mpc_new_phys || count <= mpc_new_length) {
- WARN(1, "update_mptable: No spare slots (length: %x)\n", count);
- return -1;
- }
-
- return 0;
-}
-#else /* CONFIG_X86_IO_APIC */
-static
-inline void __init check_irq_src(struct mpc_intsrc *m, int *nr_m_spare) {}
-#endif /* CONFIG_X86_IO_APIC */
-
-static int __init replace_intsrc_all(struct mpc_table *mpc,
- unsigned long mpc_new_phys,
- unsigned long mpc_new_length)
-{
-#ifdef CONFIG_X86_IO_APIC
- int i;
-#endif
- int count = sizeof(*mpc);
- int nr_m_spare = 0;
- unsigned char *mpt = ((unsigned char *)mpc) + count;
-
- printk(KERN_INFO "mpc_length %x\n", mpc->length);
- while (count < mpc->length) {
- switch (*mpt) {
- case MP_PROCESSOR:
- skip_entry(&mpt, &count, sizeof(struct mpc_cpu));
- break;
- case MP_BUS:
- skip_entry(&mpt, &count, sizeof(struct mpc_bus));
- break;
- case MP_IOAPIC:
- skip_entry(&mpt, &count, sizeof(struct mpc_ioapic));
- break;
- case MP_INTSRC:
- check_irq_src((struct mpc_intsrc *)mpt, &nr_m_spare);
- skip_entry(&mpt, &count, sizeof(struct mpc_intsrc));
- break;
- case MP_LINTSRC:
- skip_entry(&mpt, &count, sizeof(struct mpc_lintsrc));
- break;
- default:
- /* wrong mptable */
- smp_dump_mptable(mpc, mpt);
- goto out;
- }
- }
-
-#ifdef CONFIG_X86_IO_APIC
- for (i = 0; i < mp_irq_entries; i++) {
- if (irq_used[i])
- continue;
-
- if (mp_irqs[i].irqtype != mp_INT)
- continue;
-
- if (mp_irqs[i].irqflag != 0x0f)
- continue;
-
- if (nr_m_spare > 0) {
- apic_printk(APIC_VERBOSE, "*NEW* found\n");
- nr_m_spare--;
- memcpy(m_spare[nr_m_spare], &mp_irqs[i], sizeof(mp_irqs[i]));
- m_spare[nr_m_spare] = NULL;
- } else {
- struct mpc_intsrc *m = (struct mpc_intsrc *)mpt;
- count += sizeof(struct mpc_intsrc);
- if (check_slot(mpc_new_phys, mpc_new_length, count) < 0)
- goto out;
- memcpy(m, &mp_irqs[i], sizeof(*m));
- mpc->length = count;
- mpt += sizeof(struct mpc_intsrc);
- }
- print_mp_irq_info(&mp_irqs[i]);
- }
-#endif
-out:
- /* update checksum */
- mpc->checksum = 0;
- mpc->checksum -= mpf_checksum((unsigned char *)mpc, mpc->length);
-
- return 0;
-}
-
-int enable_update_mptable;
-
-static int __init update_mptable_setup(char *str)
-{
- enable_update_mptable = 1;
-#ifdef CONFIG_PCI
- pci_routeirq = 1;
-#endif
- return 0;
-}
-early_param("update_mptable", update_mptable_setup);
-
-static unsigned long __initdata mpc_new_phys;
-static unsigned long mpc_new_length __initdata = 4096;
-
-/* alloc_mptable or alloc_mptable=4k */
-static int __initdata alloc_mptable;
-static int __init parse_alloc_mptable_opt(char *p)
-{
- enable_update_mptable = 1;
-#ifdef CONFIG_PCI
- pci_routeirq = 1;
-#endif
- alloc_mptable = 1;
- if (!p)
- return 0;
- mpc_new_length = memparse(p, &p);
- return 0;
-}
-early_param("alloc_mptable", parse_alloc_mptable_opt);
-
-void __init early_reserve_e820_mpc_new(void)
-{
- if (enable_update_mptable && alloc_mptable)
- mpc_new_phys = early_reserve_e820(mpc_new_length, 4);
-}
-
-static int __init update_mp_table(void)
-{
- char str[16];
- char oem[10];
- struct mpf_intel *mpf;
- struct mpc_table *mpc, *mpc_new;
-
- if (!enable_update_mptable)
- return 0;
-
- mpf = mpf_found;
- if (!mpf)
- return 0;
-
- /*
- * Now see if we need to go further.
- */
- if (mpf->feature1 != 0)
- return 0;
-
- if (!mpf->physptr)
- return 0;
-
- mpc = phys_to_virt(mpf->physptr);
-
- if (!smp_check_mpc(mpc, oem, str))
- return 0;
-
- printk(KERN_INFO "mpf: %llx\n", (u64)virt_to_phys(mpf));
- printk(KERN_INFO "physptr: %x\n", mpf->physptr);
-
- if (mpc_new_phys && mpc->length > mpc_new_length) {
- mpc_new_phys = 0;
- printk(KERN_INFO "mpc_new_length is %ld, please use alloc_mptable=8k\n",
- mpc_new_length);
- }
-
- if (!mpc_new_phys) {
- unsigned char old, new;
- /* check if we can change the position */
- mpc->checksum = 0;
- old = mpf_checksum((unsigned char *)mpc, mpc->length);
- mpc->checksum = 0xff;
- new = mpf_checksum((unsigned char *)mpc, mpc->length);
- if (old == new) {
- printk(KERN_INFO "mpc is readonly, please try alloc_mptable instead\n");
- return 0;
- }
- printk(KERN_INFO "use in-position replacing\n");
- } else {
- mpf->physptr = mpc_new_phys;
- mpc_new = phys_to_virt(mpc_new_phys);
- memcpy(mpc_new, mpc, mpc->length);
- mpc = mpc_new;
- /* check if we can modify that */
- if (mpc_new_phys - mpf->physptr) {
- struct mpf_intel *mpf_new;
- /* steal 16 bytes from [0, 1k) */
- printk(KERN_INFO "mpf new: %x\n", 0x400 - 16);
- mpf_new = phys_to_virt(0x400 - 16);
- memcpy(mpf_new, mpf, 16);
- mpf = mpf_new;
- mpf->physptr = mpc_new_phys;
- }
- mpf->checksum = 0;
- mpf->checksum -= mpf_checksum((unsigned char *)mpf, 16);
- printk(KERN_INFO "physptr new: %x\n", mpf->physptr);
- }
-
- /*
- * only replace the one with mp_INT and
- * MP_IRQ_TRIGGER_LEVEL|MP_IRQ_POLARITY_LOW,
- * already in mp_irqs , stored by ... and mp_config_acpi_gsi,
- * may need pci=routeirq for all coverage
- */
- replace_intsrc_all(mpc, mpc_new_phys, mpc_new_length);
-
- return 0;
-}
-
-late_initcall(update_mp_table);
generated by cgit (git 2.34.1) at 2025-01-11 11:55:17 +0000