Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6

[linux-2.6-omap-h63xx.git] / include / asm-mips / system.h

diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h
index 29c55e7ab31155dcde1dc7ad9a5516608ed6a59c..dcb4701d572831fe8e7f781d364bd4a524f2b39c 100644 (file)
--- a/include/asm-mips/system.h
+++ b/include/asm-mips/system.h
@@ -12,15 +12,14 @@
 #ifndef _ASM_SYSTEM_H
 #define _ASM_SYSTEM_H
 
-#include <linux/config.h>
 #include <linux/types.h>
+#include <linux/irqflags.h>
 
 #include <asm/addrspace.h>
 #include <asm/cpu-features.h>
 #include <asm/dsp.h>
 #include <asm/ptrace.h>
 #include <asm/war.h>
-#include <asm/interrupt.h>
 
 /*
  * read_barrier_depends - Flush all pending reads that subsequents reads
@@ -144,9 +143,6 @@
 #define set_mb(var, value) \
 do { var = value; mb(); } while (0)
 
-#define set_wmb(var, value) \
-do { var = value; wmb(); } while (0)
-
 /*
  * switch_to(n) should switch tasks to task nr n, first
  * checking that n isn't the current task, in which case it does nothing.
@@ -155,6 +151,37 @@ extern asmlinkage void *resume(void *last, void *next, void *next_ti);
 
 struct task_struct;
 
+#ifdef CONFIG_MIPS_MT_FPAFF
+
+/*
+ * Handle the scheduler resume end of FPU affinity management.  We do this
+ * inline to try to keep the overhead down. If we have been forced to run on
+ * a "CPU" with an FPU because of a previous high level of FP computation,
+ * but did not actually use the FPU during the most recent time-slice (CU1
+ * isn't set), we undo the restriction on cpus_allowed.
+ *
+ * We're not calling set_cpus_allowed() here, because we have no need to
+ * force prompt migration - we're already switching the current CPU to a
+ * different thread.
+ */
+
+#define switch_to(prev,next,last)                                      \
+do {                                                                   \
+       if (cpu_has_fpu &&                                              \
+           (prev->thread.mflags & MF_FPUBOUND) &&                      \
+            (!(KSTK_STATUS(prev) & ST0_CU1))) {                        \
+               prev->thread.mflags &= ~MF_FPUBOUND;                    \
+               prev->cpus_allowed = prev->thread.user_cpus_allowed;    \
+       }                                                               \
+       if (cpu_has_dsp)                                                \
+               __save_dsp(prev);                                       \
+       next->thread.emulated_fp = 0;                                   \
+       (last) = resume(prev, next, next->thread_info);                 \
+       if (cpu_has_dsp)                                                \
+               __restore_dsp(current);                                 \
+} while(0)
+
+#else
 #define switch_to(prev,next,last)                                      \
 do {                                                                   \
        if (cpu_has_dsp)                                                \
@@ -163,6 +190,7 @@ do {                                                                        \
        if (cpu_has_dsp)                                                \
                __restore_dsp(current);                                 \
 } while(0)
+#endif
 
 /*
  * On SMP systems, when the scheduler does migration-cost autodetection,
@@ -441,6 +469,7 @@ extern void set_handler (unsigned long offset, void *addr, unsigned long len);
 extern void set_uncached_handler (unsigned long offset, void *addr, unsigned long len);
 extern void *set_vi_handler (int n, void *addr);
 extern void *set_except_vector(int n, void *addr);
+extern unsigned long ebase;
 extern void per_cpu_trap_init(void);
 
 extern NORET_TYPE void die(const char *, struct pt_regs *);