um: take arch/um/sys-x86 to arch/x86/um

[pandora-kernel.git] / arch / x86 / um / asm / processor_32.h

diff --git a/arch/x86/um/asm/processor_32.h b/arch/x86/um/asm/processor_32.h
new file mode 100644 (file)
index 0000000..ae0d189
--- /dev/null
+++ b/arch/x86/um/asm/processor_32.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PROCESSOR_I386_H
+#define __UM_PROCESSOR_I386_H
+
+#include <linux/string.h>
+#include <sysdep/host_ldt.h>
+#include <asm/segment.h>
+
+extern int host_has_cmov;
+
+struct uml_tls_struct {
+       struct user_desc tls;
+       unsigned flushed:1;
+       unsigned present:1;
+};
+
+struct arch_thread {
+       struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
+       unsigned long debugregs[8];
+       int debugregs_seq;
+       struct faultinfo faultinfo;
+};
+
+#define INIT_ARCH_THREAD { \
+       .tls_array              = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \
+                                   { .present = 0, .flushed = 0 } }, \
+       .debugregs              = { [ 0 ... 7 ] = 0 }, \
+       .debugregs_seq          = 0, \
+       .faultinfo              = { 0, 0, 0 } \
+}
+
+static inline void arch_flush_thread(struct arch_thread *thread)
+{
+       /* Clear any TLS still hanging */
+       memset(&thread->tls_array, 0, sizeof(thread->tls_array));
+}
+
+static inline void arch_copy_thread(struct arch_thread *from,
+                                    struct arch_thread *to)
+{
+        memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
+}
+
+#include <asm/user.h>
+
+/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
+static inline void rep_nop(void)
+{
+       __asm__ __volatile__("rep;nop": : :"memory");
+}
+
+#define cpu_relax()    rep_nop()
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter"). Stolen
+ * from asm-i386/processor.h
+ */
+#define current_text_addr() \
+       ({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
+
+#define ARCH_IS_STACKGROW(address) \
+       (address + 32 >= UPT_SP(&current->thread.regs.regs))
+
+#define KSTK_EIP(tsk) KSTK_REG(tsk, EIP)
+#define KSTK_ESP(tsk) KSTK_REG(tsk, UESP)
+#define KSTK_EBP(tsk) KSTK_REG(tsk, EBP)
+
+#endif