hlt
jmp 1b
-#include "../../../x86_64/kernel/verify_cpu_64.S"
+#include "../../kernel/verify_cpu_64.S"
/* Be careful here startup_64 needs to be at a predictable
* address so I can export it in an ELF header. Bootloaders
ifeq ($(CONFIG_X86_32),y)
include ${srctree}/arch/x86/kernel/Makefile_32
else
-include ${srctree}/arch/x86_64/kernel/Makefile_64
+include ${srctree}/arch/x86/kernel/Makefile_64
endif
$(obj)/vsyscall-sysenter_32.o $(obj)/vsyscall-note_32.o FORCE
$(call if_changed,syscall)
-k8-y += ../../x86_64/kernel/k8.o
-stacktrace-y += ../../x86_64/kernel/stacktrace.o
CFLAGS_vsyscall_64.o := $(PROFILING) -g0
therm_throt-y += ../../x86/kernel/cpu/mcheck/therm_throt.o
-bootflag-y += ../../x86/kernel/bootflag.o
-cpuid-$(subst m,y,$(CONFIG_X86_CPUID)) += ../../x86/kernel/cpuid.o
-topology-y += ../../x86/kernel/topology.o
-microcode-$(subst m,y,$(CONFIG_MICROCODE)) += ../../x86/kernel/microcode.o
intel_cacheinfo-y += ../../x86/kernel/cpu/intel_cacheinfo.o
addon_cpuid_features-y += ../../x86/kernel/cpu/addon_cpuid_features.o
-quirks-y += ../../x86/kernel/quirks.o
-i8237-y += ../../x86/kernel/i8237.o
-msr-$(subst m,y,$(CONFIG_X86_MSR)) += ../../x86/kernel/msr.o
-alternative-y += ../../x86/kernel/alternative.o
-pcspeaker-y += ../../x86/kernel/pcspeaker.o
perfctr-watchdog-y += ../../x86/kernel/cpu/perfctr-watchdog.o
movb $0xbc,%al ; outb %al,$0x80
jmp no_longmode
-#include "../../../x86_64/kernel/verify_cpu_64.S"
+#include "../verify_cpu_64.S"
/* This code uses an extended set of video mode numbers. These include:
* Aliases for standard modes
+#include <linux/console.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/screen_info.h>
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <asm/fcntl.h>
+#include <xen/hvc-console.h>
-#include "../../x86_64/kernel/early_printk.c"
+/* Simple VGA output */
+
+#ifdef __i386__
+#include <asm/setup.h>
+#else
+#include <asm/bootsetup.h>
+#endif
+#define VGABASE (__ISA_IO_base + 0xb8000)
+
+static int max_ypos = 25, max_xpos = 80;
+static int current_ypos = 25, current_xpos = 0;
+
+static void early_vga_write(struct console *con, const char *str, unsigned n)
+{
+ char c;
+ int i, k, j;
+
+ while ((c = *str++) != '\0' && n-- > 0) {
+ if (current_ypos >= max_ypos) {
+ /* scroll 1 line up */
+ for (k = 1, j = 0; k < max_ypos; k++, j++) {
+ for (i = 0; i < max_xpos; i++) {
+ writew(readw(VGABASE+2*(max_xpos*k+i)),
+ VGABASE + 2*(max_xpos*j + i));
+ }
+ }
+ for (i = 0; i < max_xpos; i++)
+ writew(0x720, VGABASE + 2*(max_xpos*j + i));
+ current_ypos = max_ypos-1;
+ }
+ if (c == '\n') {
+ current_xpos = 0;
+ current_ypos++;
+ } else if (c != '\r') {
+ writew(((0x7 << 8) | (unsigned short) c),
+ VGABASE + 2*(max_xpos*current_ypos +
+ current_xpos++));
+ if (current_xpos >= max_xpos) {
+ current_xpos = 0;
+ current_ypos++;
+ }
+ }
+ }
+}
+
+static struct console early_vga_console = {
+ .name = "earlyvga",
+ .write = early_vga_write,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+/* Serial functions loosely based on a similar package from Klaus P. Gerlicher */
+
+static int early_serial_base = 0x3f8; /* ttyS0 */
+
+#define XMTRDY 0x20
+
+#define DLAB 0x80
+
+#define TXR 0 /* Transmit register (WRITE) */
+#define RXR 0 /* Receive register (READ) */
+#define IER 1 /* Interrupt Enable */
+#define IIR 2 /* Interrupt ID */
+#define FCR 2 /* FIFO control */
+#define LCR 3 /* Line control */
+#define MCR 4 /* Modem control */
+#define LSR 5 /* Line Status */
+#define MSR 6 /* Modem Status */
+#define DLL 0 /* Divisor Latch Low */
+#define DLH 1 /* Divisor latch High */
+
+static int early_serial_putc(unsigned char ch)
+{
+ unsigned timeout = 0xffff;
+ while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
+ cpu_relax();
+ outb(ch, early_serial_base + TXR);
+ return timeout ? 0 : -1;
+}
+
+static void early_serial_write(struct console *con, const char *s, unsigned n)
+{
+ while (*s && n-- > 0) {
+ if (*s == '\n')
+ early_serial_putc('\r');
+ early_serial_putc(*s);
+ s++;
+ }
+}
+
+#define DEFAULT_BAUD 9600
+
+static __init void early_serial_init(char *s)
+{
+ unsigned char c;
+ unsigned divisor;
+ unsigned baud = DEFAULT_BAUD;
+ char *e;
+
+ if (*s == ',')
+ ++s;
+
+ if (*s) {
+ unsigned port;
+ if (!strncmp(s,"0x",2)) {
+ early_serial_base = simple_strtoul(s, &e, 16);
+ } else {
+ static int bases[] = { 0x3f8, 0x2f8 };
+
+ if (!strncmp(s,"ttyS",4))
+ s += 4;
+ port = simple_strtoul(s, &e, 10);
+ if (port > 1 || s == e)
+ port = 0;
+ early_serial_base = bases[port];
+ }
+ s += strcspn(s, ",");
+ if (*s == ',')
+ s++;
+ }
+
+ outb(0x3, early_serial_base + LCR); /* 8n1 */
+ outb(0, early_serial_base + IER); /* no interrupt */
+ outb(0, early_serial_base + FCR); /* no fifo */
+ outb(0x3, early_serial_base + MCR); /* DTR + RTS */
+
+ if (*s) {
+ baud = simple_strtoul(s, &e, 0);
+ if (baud == 0 || s == e)
+ baud = DEFAULT_BAUD;
+ }
+
+ divisor = 115200 / baud;
+ c = inb(early_serial_base + LCR);
+ outb(c | DLAB, early_serial_base + LCR);
+ outb(divisor & 0xff, early_serial_base + DLL);
+ outb((divisor >> 8) & 0xff, early_serial_base + DLH);
+ outb(c & ~DLAB, early_serial_base + LCR);
+}
+
+static struct console early_serial_console = {
+ .name = "earlyser",
+ .write = early_serial_write,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+/* Console interface to a host file on AMD's SimNow! */
+
+static int simnow_fd;
+
+enum {
+ MAGIC1 = 0xBACCD00A,
+ MAGIC2 = 0xCA110000,
+ XOPEN = 5,
+ XWRITE = 4,
+};
+
+static noinline long simnow(long cmd, long a, long b, long c)
+{
+ long ret;
+ asm volatile("cpuid" :
+ "=a" (ret) :
+ "b" (a), "c" (b), "d" (c), "0" (MAGIC1), "D" (cmd + MAGIC2));
+ return ret;
+}
+
+static void __init simnow_init(char *str)
+{
+ char *fn = "klog";
+ if (*str == '=')
+ fn = ++str;
+ /* error ignored */
+ simnow_fd = simnow(XOPEN, (unsigned long)fn, O_WRONLY|O_APPEND|O_CREAT, 0644);
+}
+
+static void simnow_write(struct console *con, const char *s, unsigned n)
+{
+ simnow(XWRITE, simnow_fd, (unsigned long)s, n);
+}
+
+static struct console simnow_console = {
+ .name = "simnow",
+ .write = simnow_write,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
+
+/* Direct interface for emergencies */
+struct console *early_console = &early_vga_console;
+static int early_console_initialized = 0;
+
+void early_printk(const char *fmt, ...)
+{
+ char buf[512];
+ int n;
+ va_list ap;
+
+ va_start(ap,fmt);
+ n = vscnprintf(buf,512,fmt,ap);
+ early_console->write(early_console,buf,n);
+ va_end(ap);
+}
+
+static int __initdata keep_early;
+
+static int __init setup_early_printk(char *buf)
+{
+ if (!buf)
+ return 0;
+
+ if (early_console_initialized)
+ return 0;
+ early_console_initialized = 1;
+
+ if (strstr(buf, "keep"))
+ keep_early = 1;
+
+ if (!strncmp(buf, "serial", 6)) {
+ early_serial_init(buf + 6);
+ early_console = &early_serial_console;
+ } else if (!strncmp(buf, "ttyS", 4)) {
+ early_serial_init(buf);
+ early_console = &early_serial_console;
+ } else if (!strncmp(buf, "vga", 3)
+ && SCREEN_INFO.orig_video_isVGA == 1) {
+ max_xpos = SCREEN_INFO.orig_video_cols;
+ max_ypos = SCREEN_INFO.orig_video_lines;
+ current_ypos = SCREEN_INFO.orig_y;
+ early_console = &early_vga_console;
+ } else if (!strncmp(buf, "simnow", 6)) {
+ simnow_init(buf + 6);
+ early_console = &simnow_console;
+ keep_early = 1;
+#ifdef CONFIG_HVC_XEN
+ } else if (!strncmp(buf, "xen", 3)) {
+ early_console = &xenboot_console;
+#endif
+ }
+
+ if (keep_early)
+ early_console->flags &= ~CON_BOOT;
+ else
+ early_console->flags |= CON_BOOT;
+ register_console(early_console);
+ return 0;
+}
+early_param("earlyprintk", setup_early_printk);
-#include "../../x86_64/kernel/tsc_sync.c"
+/*
+ * arch/x86_64/kernel/tsc_sync.c: check TSC synchronization.
+ *
+ * Copyright (C) 2006, Red Hat, Inc., Ingo Molnar
+ *
+ * We check whether all boot CPUs have their TSC's synchronized,
+ * print a warning if not and turn off the TSC clock-source.
+ *
+ * The warp-check is point-to-point between two CPUs, the CPU
+ * initiating the bootup is the 'source CPU', the freshly booting
+ * CPU is the 'target CPU'.
+ *
+ * Only two CPUs may participate - they can enter in any order.
+ * ( The serial nature of the boot logic and the CPU hotplug lock
+ * protects against more than 2 CPUs entering this code. )
+ */
+#include <linux/spinlock.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/nmi.h>
+#include <asm/tsc.h>
+
+/*
+ * Entry/exit counters that make sure that both CPUs
+ * run the measurement code at once:
+ */
+static __cpuinitdata atomic_t start_count;
+static __cpuinitdata atomic_t stop_count;
+
+/*
+ * We use a raw spinlock in this exceptional case, because
+ * we want to have the fastest, inlined, non-debug version
+ * of a critical section, to be able to prove TSC time-warps:
+ */
+static __cpuinitdata raw_spinlock_t sync_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static __cpuinitdata cycles_t last_tsc;
+static __cpuinitdata cycles_t max_warp;
+static __cpuinitdata int nr_warps;
+
+/*
+ * TSC-warp measurement loop running on both CPUs:
+ */
+static __cpuinit void check_tsc_warp(void)
+{
+ cycles_t start, now, prev, end;
+ int i;
+
+ start = get_cycles_sync();
+ /*
+ * The measurement runs for 20 msecs:
+ */
+ end = start + tsc_khz * 20ULL;
+ now = start;
+
+ for (i = 0; ; i++) {
+ /*
+ * We take the global lock, measure TSC, save the
+ * previous TSC that was measured (possibly on
+ * another CPU) and update the previous TSC timestamp.
+ */
+ __raw_spin_lock(&sync_lock);
+ prev = last_tsc;
+ now = get_cycles_sync();
+ last_tsc = now;
+ __raw_spin_unlock(&sync_lock);
+
+ /*
+ * Be nice every now and then (and also check whether
+ * measurement is done [we also insert a 100 million
+ * loops safety exit, so we dont lock up in case the
+ * TSC readout is totally broken]):
+ */
+ if (unlikely(!(i & 7))) {
+ if (now > end || i > 100000000)
+ break;
+ cpu_relax();
+ touch_nmi_watchdog();
+ }
+ /*
+ * Outside the critical section we can now see whether
+ * we saw a time-warp of the TSC going backwards:
+ */
+ if (unlikely(prev > now)) {
+ __raw_spin_lock(&sync_lock);
+ max_warp = max(max_warp, prev - now);
+ nr_warps++;
+ __raw_spin_unlock(&sync_lock);
+ }
+
+ }
+}
+
+/*
+ * Source CPU calls into this - it waits for the freshly booted
+ * target CPU to arrive and then starts the measurement:
+ */
+void __cpuinit check_tsc_sync_source(int cpu)
+{
+ int cpus = 2;
+
+ /*
+ * No need to check if we already know that the TSC is not
+ * synchronized:
+ */
+ if (unsynchronized_tsc())
+ return;
+
+ printk(KERN_INFO "checking TSC synchronization [CPU#%d -> CPU#%d]:",
+ smp_processor_id(), cpu);
+
+ /*
+ * Reset it - in case this is a second bootup:
+ */
+ atomic_set(&stop_count, 0);
+
+ /*
+ * Wait for the target to arrive:
+ */
+ while (atomic_read(&start_count) != cpus-1)
+ cpu_relax();
+ /*
+ * Trigger the target to continue into the measurement too:
+ */
+ atomic_inc(&start_count);
+
+ check_tsc_warp();
+
+ while (atomic_read(&stop_count) != cpus-1)
+ cpu_relax();
+
+ /*
+ * Reset it - just in case we boot another CPU later:
+ */
+ atomic_set(&start_count, 0);
+
+ if (nr_warps) {
+ printk("\n");
+ printk(KERN_WARNING "Measured %Ld cycles TSC warp between CPUs,"
+ " turning off TSC clock.\n", max_warp);
+ mark_tsc_unstable("check_tsc_sync_source failed");
+ nr_warps = 0;
+ max_warp = 0;
+ last_tsc = 0;
+ } else {
+ printk(" passed.\n");
+ }
+
+ /*
+ * Let the target continue with the bootup:
+ */
+ atomic_inc(&stop_count);
+}
+
+/*
+ * Freshly booted CPUs call into this:
+ */
+void __cpuinit check_tsc_sync_target(void)
+{
+ int cpus = 2;
+
+ if (unsynchronized_tsc())
+ return;
+
+ /*
+ * Register this CPU's participation and wait for the
+ * source CPU to start the measurement:
+ */
+ atomic_inc(&start_count);
+ while (atomic_read(&start_count) != cpus)
+ cpu_relax();
+
+ check_tsc_warp();
+
+ /*
+ * Ok, we are done:
+ */
+ atomic_inc(&stop_count);
+
+ /*
+ * Wait for the source CPU to print stuff:
+ */
+ while (atomic_read(&stop_count) != cpus)
+ cpu_relax();
+}
+#undef NR_LOOPS
+
#
# $Id: Makefile,v 1.31 2002/03/22 15:56:07 ak Exp $
+# Fill in SRCARCH
+SRCARCH := x86
+
+archprepare:
+ @mkdir -p ${objtree}/arch/x86/kernel
+
+
LDFLAGS := -m elf_x86_64
OBJCOPYFLAGS := -O binary -R .note -R .comment -S
LDFLAGS_vmlinux :=
CFLAGS_KERNEL += $(cflags-kernel-y)
AFLAGS += -m64
-head-y := arch/x86_64/kernel/head_64.o arch/x86_64/kernel/head64.o arch/x86_64/kernel/init_task_64.o
+head-y := arch/x86/kernel/head_64.o arch/x86/kernel/head64.o arch/x86/kernel/init_task_64.o
libs-y += arch/x86/lib/
-core-y += arch/x86_64/kernel/ \
+core-y += arch/x86/kernel/ \
arch/x86/mm/ \
arch/x86/crypto/ \
arch/x86/vdso/
+++ /dev/null
-ifeq ($(CONFIG_X86_32),y)
-include ${srctree}/arch/x86/kernel/Makefile_32
-else
-include ${srctree}/arch/x86_64/kernel/Makefile_64
-endif
+++ /dev/null
-#ifdef CONFIG_X86_32
-# include "asm-offsets_32.c"
-#else
-# include "asm-offsets_64.c"
-#endif
+++ /dev/null
-#include <linux/console.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/string.h>
-#include <linux/screen_info.h>
-#include <asm/io.h>
-#include <asm/processor.h>
-#include <asm/fcntl.h>
-#include <xen/hvc-console.h>
-
-/* Simple VGA output */
-
-#ifdef __i386__
-#include <asm/setup.h>
-#else
-#include <asm/bootsetup.h>
-#endif
-#define VGABASE (__ISA_IO_base + 0xb8000)
-
-static int max_ypos = 25, max_xpos = 80;
-static int current_ypos = 25, current_xpos = 0;
-
-static void early_vga_write(struct console *con, const char *str, unsigned n)
-{
- char c;
- int i, k, j;
-
- while ((c = *str++) != '\0' && n-- > 0) {
- if (current_ypos >= max_ypos) {
- /* scroll 1 line up */
- for (k = 1, j = 0; k < max_ypos; k++, j++) {
- for (i = 0; i < max_xpos; i++) {
- writew(readw(VGABASE+2*(max_xpos*k+i)),
- VGABASE + 2*(max_xpos*j + i));
- }
- }
- for (i = 0; i < max_xpos; i++)
- writew(0x720, VGABASE + 2*(max_xpos*j + i));
- current_ypos = max_ypos-1;
- }
- if (c == '\n') {
- current_xpos = 0;
- current_ypos++;
- } else if (c != '\r') {
- writew(((0x7 << 8) | (unsigned short) c),
- VGABASE + 2*(max_xpos*current_ypos +
- current_xpos++));
- if (current_xpos >= max_xpos) {
- current_xpos = 0;
- current_ypos++;
- }
- }
- }
-}
-
-static struct console early_vga_console = {
- .name = "earlyvga",
- .write = early_vga_write,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-/* Serial functions loosely based on a similar package from Klaus P. Gerlicher */
-
-static int early_serial_base = 0x3f8; /* ttyS0 */
-
-#define XMTRDY 0x20
-
-#define DLAB 0x80
-
-#define TXR 0 /* Transmit register (WRITE) */
-#define RXR 0 /* Receive register (READ) */
-#define IER 1 /* Interrupt Enable */
-#define IIR 2 /* Interrupt ID */
-#define FCR 2 /* FIFO control */
-#define LCR 3 /* Line control */
-#define MCR 4 /* Modem control */
-#define LSR 5 /* Line Status */
-#define MSR 6 /* Modem Status */
-#define DLL 0 /* Divisor Latch Low */
-#define DLH 1 /* Divisor latch High */
-
-static int early_serial_putc(unsigned char ch)
-{
- unsigned timeout = 0xffff;
- while ((inb(early_serial_base + LSR) & XMTRDY) == 0 && --timeout)
- cpu_relax();
- outb(ch, early_serial_base + TXR);
- return timeout ? 0 : -1;
-}
-
-static void early_serial_write(struct console *con, const char *s, unsigned n)
-{
- while (*s && n-- > 0) {
- if (*s == '\n')
- early_serial_putc('\r');
- early_serial_putc(*s);
- s++;
- }
-}
-
-#define DEFAULT_BAUD 9600
-
-static __init void early_serial_init(char *s)
-{
- unsigned char c;
- unsigned divisor;
- unsigned baud = DEFAULT_BAUD;
- char *e;
-
- if (*s == ',')
- ++s;
-
- if (*s) {
- unsigned port;
- if (!strncmp(s,"0x",2)) {
- early_serial_base = simple_strtoul(s, &e, 16);
- } else {
- static int bases[] = { 0x3f8, 0x2f8 };
-
- if (!strncmp(s,"ttyS",4))
- s += 4;
- port = simple_strtoul(s, &e, 10);
- if (port > 1 || s == e)
- port = 0;
- early_serial_base = bases[port];
- }
- s += strcspn(s, ",");
- if (*s == ',')
- s++;
- }
-
- outb(0x3, early_serial_base + LCR); /* 8n1 */
- outb(0, early_serial_base + IER); /* no interrupt */
- outb(0, early_serial_base + FCR); /* no fifo */
- outb(0x3, early_serial_base + MCR); /* DTR + RTS */
-
- if (*s) {
- baud = simple_strtoul(s, &e, 0);
- if (baud == 0 || s == e)
- baud = DEFAULT_BAUD;
- }
-
- divisor = 115200 / baud;
- c = inb(early_serial_base + LCR);
- outb(c | DLAB, early_serial_base + LCR);
- outb(divisor & 0xff, early_serial_base + DLL);
- outb((divisor >> 8) & 0xff, early_serial_base + DLH);
- outb(c & ~DLAB, early_serial_base + LCR);
-}
-
-static struct console early_serial_console = {
- .name = "earlyser",
- .write = early_serial_write,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-/* Console interface to a host file on AMD's SimNow! */
-
-static int simnow_fd;
-
-enum {
- MAGIC1 = 0xBACCD00A,
- MAGIC2 = 0xCA110000,
- XOPEN = 5,
- XWRITE = 4,
-};
-
-static noinline long simnow(long cmd, long a, long b, long c)
-{
- long ret;
- asm volatile("cpuid" :
- "=a" (ret) :
- "b" (a), "c" (b), "d" (c), "0" (MAGIC1), "D" (cmd + MAGIC2));
- return ret;
-}
-
-static void __init simnow_init(char *str)
-{
- char *fn = "klog";
- if (*str == '=')
- fn = ++str;
- /* error ignored */
- simnow_fd = simnow(XOPEN, (unsigned long)fn, O_WRONLY|O_APPEND|O_CREAT, 0644);
-}
-
-static void simnow_write(struct console *con, const char *s, unsigned n)
-{
- simnow(XWRITE, simnow_fd, (unsigned long)s, n);
-}
-
-static struct console simnow_console = {
- .name = "simnow",
- .write = simnow_write,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
-/* Direct interface for emergencies */
-struct console *early_console = &early_vga_console;
-static int early_console_initialized = 0;
-
-void early_printk(const char *fmt, ...)
-{
- char buf[512];
- int n;
- va_list ap;
-
- va_start(ap,fmt);
- n = vscnprintf(buf,512,fmt,ap);
- early_console->write(early_console,buf,n);
- va_end(ap);
-}
-
-static int __initdata keep_early;
-
-static int __init setup_early_printk(char *buf)
-{
- if (!buf)
- return 0;
-
- if (early_console_initialized)
- return 0;
- early_console_initialized = 1;
-
- if (strstr(buf, "keep"))
- keep_early = 1;
-
- if (!strncmp(buf, "serial", 6)) {
- early_serial_init(buf + 6);
- early_console = &early_serial_console;
- } else if (!strncmp(buf, "ttyS", 4)) {
- early_serial_init(buf);
- early_console = &early_serial_console;
- } else if (!strncmp(buf, "vga", 3)
- && SCREEN_INFO.orig_video_isVGA == 1) {
- max_xpos = SCREEN_INFO.orig_video_cols;
- max_ypos = SCREEN_INFO.orig_video_lines;
- current_ypos = SCREEN_INFO.orig_y;
- early_console = &early_vga_console;
- } else if (!strncmp(buf, "simnow", 6)) {
- simnow_init(buf + 6);
- early_console = &simnow_console;
- keep_early = 1;
-#ifdef CONFIG_HVC_XEN
- } else if (!strncmp(buf, "xen", 3)) {
- early_console = &xenboot_console;
-#endif
- }
-
- if (keep_early)
- early_console->flags &= ~CON_BOOT;
- else
- early_console->flags |= CON_BOOT;
- register_console(early_console);
- return 0;
-}
-early_param("earlyprintk", setup_early_printk);
+++ /dev/null
-/*
- * arch/x86_64/kernel/tsc_sync.c: check TSC synchronization.
- *
- * Copyright (C) 2006, Red Hat, Inc., Ingo Molnar
- *
- * We check whether all boot CPUs have their TSC's synchronized,
- * print a warning if not and turn off the TSC clock-source.
- *
- * The warp-check is point-to-point between two CPUs, the CPU
- * initiating the bootup is the 'source CPU', the freshly booting
- * CPU is the 'target CPU'.
- *
- * Only two CPUs may participate - they can enter in any order.
- * ( The serial nature of the boot logic and the CPU hotplug lock
- * protects against more than 2 CPUs entering this code. )
- */
-#include <linux/spinlock.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/nmi.h>
-#include <asm/tsc.h>
-
-/*
- * Entry/exit counters that make sure that both CPUs
- * run the measurement code at once:
- */
-static __cpuinitdata atomic_t start_count;
-static __cpuinitdata atomic_t stop_count;
-
-/*
- * We use a raw spinlock in this exceptional case, because
- * we want to have the fastest, inlined, non-debug version
- * of a critical section, to be able to prove TSC time-warps:
- */
-static __cpuinitdata raw_spinlock_t sync_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static __cpuinitdata cycles_t last_tsc;
-static __cpuinitdata cycles_t max_warp;
-static __cpuinitdata int nr_warps;
-
-/*
- * TSC-warp measurement loop running on both CPUs:
- */
-static __cpuinit void check_tsc_warp(void)
-{
- cycles_t start, now, prev, end;
- int i;
-
- start = get_cycles_sync();
- /*
- * The measurement runs for 20 msecs:
- */
- end = start + tsc_khz * 20ULL;
- now = start;
-
- for (i = 0; ; i++) {
- /*
- * We take the global lock, measure TSC, save the
- * previous TSC that was measured (possibly on
- * another CPU) and update the previous TSC timestamp.
- */
- __raw_spin_lock(&sync_lock);
- prev = last_tsc;
- now = get_cycles_sync();
- last_tsc = now;
- __raw_spin_unlock(&sync_lock);
-
- /*
- * Be nice every now and then (and also check whether
- * measurement is done [we also insert a 100 million
- * loops safety exit, so we dont lock up in case the
- * TSC readout is totally broken]):
- */
- if (unlikely(!(i & 7))) {
- if (now > end || i > 100000000)
- break;
- cpu_relax();
- touch_nmi_watchdog();
- }
- /*
- * Outside the critical section we can now see whether
- * we saw a time-warp of the TSC going backwards:
- */
- if (unlikely(prev > now)) {
- __raw_spin_lock(&sync_lock);
- max_warp = max(max_warp, prev - now);
- nr_warps++;
- __raw_spin_unlock(&sync_lock);
- }
-
- }
-}
-
-/*
- * Source CPU calls into this - it waits for the freshly booted
- * target CPU to arrive and then starts the measurement:
- */
-void __cpuinit check_tsc_sync_source(int cpu)
-{
- int cpus = 2;
-
- /*
- * No need to check if we already know that the TSC is not
- * synchronized:
- */
- if (unsynchronized_tsc())
- return;
-
- printk(KERN_INFO "checking TSC synchronization [CPU#%d -> CPU#%d]:",
- smp_processor_id(), cpu);
-
- /*
- * Reset it - in case this is a second bootup:
- */
- atomic_set(&stop_count, 0);
-
- /*
- * Wait for the target to arrive:
- */
- while (atomic_read(&start_count) != cpus-1)
- cpu_relax();
- /*
- * Trigger the target to continue into the measurement too:
- */
- atomic_inc(&start_count);
-
- check_tsc_warp();
-
- while (atomic_read(&stop_count) != cpus-1)
- cpu_relax();
-
- /*
- * Reset it - just in case we boot another CPU later:
- */
- atomic_set(&start_count, 0);
-
- if (nr_warps) {
- printk("\n");
- printk(KERN_WARNING "Measured %Ld cycles TSC warp between CPUs,"
- " turning off TSC clock.\n", max_warp);
- mark_tsc_unstable("check_tsc_sync_source failed");
- nr_warps = 0;
- max_warp = 0;
- last_tsc = 0;
- } else {
- printk(" passed.\n");
- }
-
- /*
- * Let the target continue with the bootup:
- */
- atomic_inc(&stop_count);
-}
-
-/*
- * Freshly booted CPUs call into this:
- */
-void __cpuinit check_tsc_sync_target(void)
-{
- int cpus = 2;
-
- if (unsynchronized_tsc())
- return;
-
- /*
- * Register this CPU's participation and wait for the
- * source CPU to start the measurement:
- */
- atomic_inc(&start_count);
- while (atomic_read(&start_count) != cpus)
- cpu_relax();
-
- check_tsc_warp();
-
- /*
- * Ok, we are done:
- */
- atomic_inc(&stop_count);
-
- /*
- * Wait for the source CPU to print stuff:
- */
- while (atomic_read(&stop_count) != cpus)
- cpu_relax();
-}
-#undef NR_LOOPS
-
+++ /dev/null
-#ifdef CONFIG_X86_32
-# include "vmlinux_32.lds.S"
-#else
-# include "vmlinux_64.lds.S"
-#endif
projects / linux-2.6 / commitdiff