i386/x86_64: move headers to include/asm-x86

Move the headers to include/asm-x86 and fixup the
header install make rules

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 125 insertions, 0 deletions

diff --git a/include/asm-x86/pda.h b/include/asm-x86/pda.h
new file mode 100644
index 000000000000..5642634843c4
--- /dev/null
+++ b/include/asm-x86/pda.h
@@ -0,0 +1,125 @@
+#ifndef X86_64_PDA_H
+#define X86_64_PDA_H
+
+#ifndef __ASSEMBLY__
+#include <linux/stddef.h>
+#include <linux/types.h>
+#include <linux/cache.h>
+#include <asm/page.h>
+
+/* Per processor datastructure. %gs points to it while the kernel runs */ 
+struct x8664_pda {
+        struct task_struct *pcurrent;   /* 0  Current process */
+        unsigned long data_offset;      /* 8 Per cpu data offset from linker
+                                           address */
+        unsigned long kernelstack;  /* 16 top of kernel stack for current */
+        unsigned long oldrsp;       /* 24 user rsp for system call */
+        int irqcount;               /* 32 Irq nesting counter. Starts with -1 */
+        int cpunumber;              /* 36 Logical CPU number */
+#ifdef CONFIG_CC_STACKPROTECTOR
+        unsigned long stack_canary;     /* 40 stack canary value */
+                                        /* gcc-ABI: this canary MUST be at
+                                           offset 40!!! */
+#endif
+        char *irqstackptr;
+        int nodenumber;             /* number of current node */
+        unsigned int __softirq_pending;
+        unsigned int __nmi_count;       /* number of NMI on this CPUs */
+        short mmu_state;
+        short isidle;
+        struct mm_struct *active_mm;
+        unsigned apic_timer_irqs;
+} ____cacheline_aligned_in_smp;
+
+extern struct x8664_pda *_cpu_pda[];
+extern struct x8664_pda boot_cpu_pda[];
+
+#define cpu_pda(i) (_cpu_pda[i])
+
+/* 
+ * There is no fast way to get the base address of the PDA, all the accesses
+ * have to mention %fs/%gs.  So it needs to be done this Torvaldian way.
+ */ 
+extern void __bad_pda_field(void) __attribute__((noreturn));
+
+/*
+ * proxy_pda doesn't actually exist, but tell gcc it is accessed for
+ * all PDA accesses so it gets read/write dependencies right.
+ */
+extern struct x8664_pda _proxy_pda;
+
+#define pda_offset(field) offsetof(struct x8664_pda, field)
+
+#define pda_to_op(op,field,val) do {            \
+        typedef typeof(_proxy_pda.field) T__;   \
+        if (0) { T__ tmp__; tmp__ = (val); }    /* type checking */ \
+        switch (sizeof(_proxy_pda.field)) {     \
+        case 2:                                 \
+                asm(op "w %1,%%gs:%c2" :        \
+                    "+m" (_proxy_pda.field) :   \
+                    "ri" ((T__)val),            \
+                    "i"(pda_offset(field)));    \
+                break;                          \
+        case 4:                                 \
+                asm(op "l %1,%%gs:%c2" :        \
+                    "+m" (_proxy_pda.field) :   \
+                    "ri" ((T__)val),            \
+                    "i" (pda_offset(field)));   \
+                break;                          \
+        case 8:                                 \
+                asm(op "q %1,%%gs:%c2":         \
+                    "+m" (_proxy_pda.field) :   \
+                    "ri" ((T__)val),            \
+                    "i"(pda_offset(field)));    \
+                break;                          \
+       default:                                 \
+                __bad_pda_field();              \
+       }                                        \
+       } while (0)
+
+#define pda_from_op(op,field) ({                \
+        typeof(_proxy_pda.field) ret__;         \
+        switch (sizeof(_proxy_pda.field)) {     \
+        case 2:                                 \
+                asm(op "w %%gs:%c1,%0" :        \
+                    "=r" (ret__) :              \
+                    "i" (pda_offset(field)),    \
+                    "m" (_proxy_pda.field));    \
+                 break;                         \
+        case 4:                                 \
+                asm(op "l %%gs:%c1,%0":         \
+                    "=r" (ret__):               \
+                    "i" (pda_offset(field)),    \
+                    "m" (_proxy_pda.field));    \
+                 break;                         \
+       case 8:                                  \
+                asm(op "q %%gs:%c1,%0":         \
+                    "=r" (ret__) :              \
+                    "i" (pda_offset(field)),    \
+                    "m" (_proxy_pda.field));    \
+                 break;                         \
+       default:                                 \
+                __bad_pda_field();              \
+       }                                        \
+       ret__; })
+
+#define read_pda(field) pda_from_op("mov",field)
+#define write_pda(field,val) pda_to_op("mov",field,val)
+#define add_pda(field,val) pda_to_op("add",field,val)
+#define sub_pda(field,val) pda_to_op("sub",field,val)
+#define or_pda(field,val) pda_to_op("or",field,val)
+
+/* This is not atomic against other CPUs -- CPU preemption needs to be off */
+#define test_and_clear_bit_pda(bit,field) ({            \
+        int old__;                                              \
+        asm volatile("btr %2,%%gs:%c3\n\tsbbl %0,%0"            \
+            : "=r" (old__), "+m" (_proxy_pda.field)             \
+            : "dIr" (bit), "i" (pda_offset(field)) : "memory"); \
+        old__;                                                  \
+})
+
+#endif
+
+#define PDA_STACKOFFSET (5*8)
+
+#endif