Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 157 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/suspend.c b/arch/x86_64/kernel/suspend.c
new file mode 100644
index 000000000000..ebaa1e37d657
--- /dev/null
+++ b/arch/x86_64/kernel/suspend.c
@@ -0,0 +1,157 @@
+/*
+ * Suspend support specific for i386.
+ *
+ * Distribute under GPLv2
+ *
+ * Copyright (c) 2002 Pavel Machek <pavel@suse.cz>
+ * Copyright (c) 2001 Patrick Mochel <mochel@osdl.org>
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/poll.h>
+#include <linux/delay.h>
+#include <linux/sysrq.h>
+#include <linux/proc_fs.h>
+#include <linux/irq.h>
+#include <linux/pm.h>
+#include <linux/device.h>
+#include <linux/suspend.h>
+#include <asm/uaccess.h>
+#include <asm/acpi.h>
+#include <asm/tlbflush.h>
+#include <asm/io.h>
+#include <asm/proto.h>
+
+struct saved_context saved_context;
+
+unsigned long saved_context_eax, saved_context_ebx, saved_context_ecx, saved_context_edx;
+unsigned long saved_context_esp, saved_context_ebp, saved_context_esi, saved_context_edi;
+unsigned long saved_context_r08, saved_context_r09, saved_context_r10, saved_context_r11;
+unsigned long saved_context_r12, saved_context_r13, saved_context_r14, saved_context_r15;
+unsigned long saved_context_eflags;
+
+void __save_processor_state(struct saved_context *ctxt)
+{
+        kernel_fpu_begin();
+
+        /*
+         * descriptor tables
+         */
+        asm volatile ("sgdt %0" : "=m" (ctxt->gdt_limit));
+        asm volatile ("sidt %0" : "=m" (ctxt->idt_limit));
+        asm volatile ("sldt %0" : "=m" (ctxt->ldt));
+        asm volatile ("str %0"  : "=m" (ctxt->tr));
+
+        /* XMM0..XMM15 should be handled by kernel_fpu_begin(). */
+        /* EFER should be constant for kernel version, no need to handle it. */
+        /*
+         * segment registers
+         */
+        asm volatile ("movw %%ds, %0" : "=m" (ctxt->ds));
+        asm volatile ("movw %%es, %0" : "=m" (ctxt->es));
+        asm volatile ("movw %%fs, %0" : "=m" (ctxt->fs));
+        asm volatile ("movw %%gs, %0" : "=m" (ctxt->gs));
+        asm volatile ("movw %%ss, %0" : "=m" (ctxt->ss));
+
+        rdmsrl(MSR_FS_BASE, ctxt->fs_base);
+        rdmsrl(MSR_GS_BASE, ctxt->gs_base);
+        rdmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
+
+        /*
+         * control registers 
+         */
+        asm volatile ("movq %%cr0, %0" : "=r" (ctxt->cr0));
+        asm volatile ("movq %%cr2, %0" : "=r" (ctxt->cr2));
+        asm volatile ("movq %%cr3, %0" : "=r" (ctxt->cr3));
+        asm volatile ("movq %%cr4, %0" : "=r" (ctxt->cr4));
+}
+
+void save_processor_state(void)
+{
+        __save_processor_state(&saved_context);
+}
+
+static void
+do_fpu_end(void)
+{
+        /* restore FPU regs if necessary */
+        /* Do it out of line so that gcc does not move cr0 load to some stupid place */
+        kernel_fpu_end();
+        mxcsr_feature_mask_init();
+}
+
+void __restore_processor_state(struct saved_context *ctxt)
+{
+        /*
+         * control registers
+         */
+        asm volatile ("movq %0, %%cr4" :: "r" (ctxt->cr4));
+        asm volatile ("movq %0, %%cr3" :: "r" (ctxt->cr3));
+        asm volatile ("movq %0, %%cr2" :: "r" (ctxt->cr2));
+        asm volatile ("movq %0, %%cr0" :: "r" (ctxt->cr0));
+
+        /*
+         * segment registers
+         */
+        asm volatile ("movw %0, %%ds" :: "r" (ctxt->ds));
+        asm volatile ("movw %0, %%es" :: "r" (ctxt->es));
+        asm volatile ("movw %0, %%fs" :: "r" (ctxt->fs));
+        load_gs_index(ctxt->gs);
+        asm volatile ("movw %0, %%ss" :: "r" (ctxt->ss));
+
+        wrmsrl(MSR_FS_BASE, ctxt->fs_base);
+        wrmsrl(MSR_GS_BASE, ctxt->gs_base);
+        wrmsrl(MSR_KERNEL_GS_BASE, ctxt->gs_kernel_base);
+
+        /*
+         * now restore the descriptor tables to their proper values
+         * ltr is done i fix_processor_context().
+         */
+        asm volatile ("lgdt %0" :: "m" (ctxt->gdt_limit));
+        asm volatile ("lidt %0" :: "m" (ctxt->idt_limit));
+        asm volatile ("lldt %0" :: "m" (ctxt->ldt));
+
+        fix_processor_context();
+
+        do_fpu_end();
+}
+
+void restore_processor_state(void)
+{
+        __restore_processor_state(&saved_context);
+}
+
+void fix_processor_context(void)
+{
+        int cpu = smp_processor_id();
+        struct tss_struct *t = &per_cpu(init_tss, cpu);
+
+        set_tss_desc(cpu,t);    /* This just modifies memory; should not be neccessary. But... This is neccessary, because 386 hardware has concept of busy TSS or some similar stupidity. */
+
+        cpu_gdt_table[cpu][GDT_ENTRY_TSS].type = 9;
+
+        syscall_init();                         /* This sets MSR_*STAR and related */
+        load_TR_desc();                         /* This does ltr */
+        load_LDT(&current->active_mm->context); /* This does lldt */
+
+        /*
+         * Now maybe reload the debug registers
+         */
+        if (current->thread.debugreg7){
+                loaddebug(&current->thread, 0);
+                loaddebug(&current->thread, 1);
+                loaddebug(&current->thread, 2);
+                loaddebug(&current->thread, 3);
+                /* no 4 and 5 */
+                loaddebug(&current->thread, 6);
+                loaddebug(&current->thread, 7);
+        }
+
+}
+
+