Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2f66dcc933f012cd487c5ebf5d400e50b1d5c488
Commit:     2f66dcc933f012cd487c5ebf5d400e50b1d5c488
Parent:     7ba65c7e17a292fe1e6e48fd38d1b1ecb626b586
Author:     Glauber de Oliveira Costa <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:31:57 2008 +0100
Committer:  Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:31:57 2008 +0100

    x86: finish processor.h integration
    
    What's left in processor_32.h and processor_64.h cannot be cleanly
    integrated. However, it's just a couple of definitions. They are moved
    to processor.h around ifdefs, and the original files are deleted. Note that
    there's much less headers included in the final version.
    
    Signed-off-by: Glauber de Oliveira Costa <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
    Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
 include/asm-x86/processor.h |  140 ++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 137 insertions(+), 3 deletions(-)

diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h
index ea222cf..e6fa06f 100644
--- a/include/asm-x86/processor.h
+++ b/include/asm-x86/processor.h
@@ -7,12 +7,24 @@
 struct task_struct;
 struct mm_struct;
 
+#include <asm/vm86.h>
+#include <asm/math_emu.h>
+#include <asm/segment.h>
 #include <asm/page.h>
-#include <asm/percpu.h>
+#include <asm/types.h>
+#include <asm/sigcontext.h>
+#include <asm/current.h>
+#include <asm/cpufeature.h>
 #include <asm/system.h>
+#include <asm/page.h>
 #include <asm/percpu.h>
+#include <asm/msr.h>
+#include <asm/desc_defs.h>
+#include <linux/personality.h>
 #include <linux/cpumask.h>
 #include <linux/cache.h>
+#include <linux/threads.h>
+#include <linux/init.h>
 
 /*
  * Default implementation of macro that returns current
@@ -285,9 +297,13 @@ union i387_union {
 };
 
 #ifdef CONFIG_X86_32
-# include "processor_32.h"
+/*
+ * the following now lives in the per cpu area:
+ * extern      int cpu_llc_id[NR_CPUS];
+ */
+DECLARE_PER_CPU(u8, cpu_llc_id);
 #else
-# include "processor_64.h"
+DECLARE_PER_CPU(struct orig_ist, orig_ist);
 #endif
 
 extern void print_cpu_info(struct cpuinfo_x86 *);
@@ -770,6 +786,124 @@ static inline void prefetchw(const void *x)
 }
 
 #define spin_lock_prefetch(x)  prefetchw(x)
+#ifdef CONFIG_X86_32
+/*
+ * User space process size: 3GB (default).
+ */
+#define TASK_SIZE      (PAGE_OFFSET)
+
+#define INIT_THREAD  {                                                 \
+       .sp0 = sizeof(init_stack) + (long)&init_stack,                  \
+       .vm86_info = NULL,                                              \
+       .sysenter_cs = __KERNEL_CS,                                     \
+       .io_bitmap_ptr = NULL,                                          \
+       .fs = __KERNEL_PERCPU,                                          \
+}
+
+/*
+ * Note that the .io_bitmap member must be extra-big. This is because
+ * the CPU will access an additional byte beyond the end of the IO
+ * permission bitmap. The extra byte must be all 1 bits, and must
+ * be within the limit.
+ */
+#define INIT_TSS  {                                                    \
+       .x86_tss = {                                                    \
+               .sp0            = sizeof(init_stack) + (long)&init_stack, \
+               .ss0            = __KERNEL_DS,                          \
+               .ss1            = __KERNEL_CS,                          \
+               .io_bitmap_base = INVALID_IO_BITMAP_OFFSET,             \
+        },                                                             \
+       .io_bitmap      = { [0 ... IO_BITMAP_LONGS] = ~0 },             \
+}
+
+#define start_thread(regs, new_eip, new_esp) do {              \
+       __asm__("movl %0,%%gs": :"r" (0));                      \
+       regs->fs = 0;                                           \
+       set_fs(USER_DS);                                        \
+       regs->ds = __USER_DS;                                   \
+       regs->es = __USER_DS;                                   \
+       regs->ss = __USER_DS;                                   \
+       regs->cs = __USER_CS;                                   \
+       regs->ip = new_eip;                                     \
+       regs->sp = new_esp;                                     \
+} while (0)
+
+
+extern unsigned long thread_saved_pc(struct task_struct *tsk);
+
+#define THREAD_SIZE_LONGS      (THREAD_SIZE/sizeof(unsigned long))
+#define KSTK_TOP(info)                                                 \
+({                                                                     \
+       unsigned long *__ptr = (unsigned long *)(info);                 \
+       (unsigned long)(&__ptr[THREAD_SIZE_LONGS]);                     \
+})
+
+/*
+ * The below -8 is to reserve 8 bytes on top of the ring0 stack.
+ * This is necessary to guarantee that the entire "struct pt_regs"
+ * is accessable even if the CPU haven't stored the SS/ESP registers
+ * on the stack (interrupt gate does not save these registers
+ * when switching to the same priv ring).
+ * Therefore beware: accessing the ss/esp fields of the
+ * "struct pt_regs" is possible, but they may contain the
+ * completely wrong values.
+ */
+#define task_pt_regs(task)                                             \
+({                                                                     \
+       struct pt_regs *__regs__;                                       \
+       __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \
+       __regs__ - 1;                                                   \
+})
+
+#define KSTK_ESP(task) (task_pt_regs(task)->sp)
+
+#else
+/*
+ * User space process size. 47bits minus one guard page.
+ */
+#define TASK_SIZE64    (0x800000000000UL - 4096)
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
+                          0xc0000000 : 0xFFFFe000)
+
+#define TASK_SIZE              (test_thread_flag(TIF_IA32) ? \
+                                IA32_PAGE_OFFSET : TASK_SIZE64)
+#define TASK_SIZE_OF(child)    ((test_tsk_thread_flag(child, TIF_IA32)) ? \
+                                 IA32_PAGE_OFFSET : TASK_SIZE64)
+
+#define INIT_THREAD  { \
+       .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+}
+
+#define INIT_TSS  { \
+       .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \
+}
+
+#define start_thread(regs, new_rip, new_rsp) do {                           \
+       asm volatile("movl %0,%%fs; movl %0,%%es; movl %0,%%ds": :"r" (0));  \
+       load_gs_index(0);                                                    \
+       (regs)->ip = (new_rip);                                              \
+       (regs)->sp = (new_rsp);                                              \
+       write_pda(oldrsp, (new_rsp));                                        \
+       (regs)->cs = __USER_CS;                                              \
+       (regs)->ss = __USER_DS;                                              \
+       (regs)->flags = 0x200;                                               \
+       set_fs(USER_DS);                                                     \
+} while (0)
+
+/*
+ * Return saved PC of a blocked thread.
+ * What is this good for? it will be always the scheduler or ret_from_fork.
+ */
+#define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8))
+
+#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1)
+#define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */
+#endif /* CONFIG_X86_64 */
+
 /* This decides where the kernel will search for a free chunk of vm
  * space during mmap's.
  */
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to