--- zzzz-none-000/linux-2.4.17/arch/mips/kernel/process.c	2001-09-09 17:43:01.000000000 +0000
+++ sangam-fb-322/linux-2.4.17/arch/mips/kernel/process.c	2004-11-24 13:22:35.000000000 +0000
@@ -13,6 +13,7 @@
 #include <linux/mm.h>
 #include <linux/stddef.h>
 #include <linux/unistd.h>
+#include <linux/personality.h>
 #include <linux/ptrace.h>
 #include <linux/slab.h>
 #include <linux/mman.h>
@@ -32,6 +33,8 @@
 #include <asm/elf.h>
 #include <asm/isadep.h>
 
+#include <linux/interrupt.h>
+
 void cpu_idle(void)
 {
 	/* endless idle loop with no priority at all */
@@ -40,6 +43,13 @@
 	init_idle();
 
 	while (1) {
+#if 0
+{                                     
+    int cpu = smp_processor_id();     
+    if(softirq_pending(cpu))          
+        do_softirq();                 
+}                                     
+#endif
 		while (!current->need_resched)
 			if (cpu_wait)
 				(*cpu_wait)();
@@ -55,8 +65,8 @@
 void exit_thread(void)
 {
 	/* Forget lazy fpu state */
-	if (last_task_used_math == current) {
-		set_cp0_status(ST0_CU1);
+	if (last_task_used_math == current && mips_cpu.options & MIPS_CPU_FPU) {
+		__enable_fpu();
 		__asm__ __volatile__("cfc1\t$0,$31");
 		last_task_used_math = NULL;
 	}
@@ -65,8 +75,8 @@
 void flush_thread(void)
 {
 	/* Forget lazy fpu state */
-	if (last_task_used_math == current) {
-		set_cp0_status(ST0_CU1);
+	if (last_task_used_math == current && mips_cpu.options & MIPS_CPU_FPU) {
+		__enable_fpu();
 		__asm__ __volatile__("cfc1\t$0,$31");
 		last_task_used_math = NULL;
 	}
@@ -84,7 +94,7 @@
 
 	if (last_task_used_math == current)
 		if (mips_cpu.options & MIPS_CPU_FPU) {
-			set_cp0_status(ST0_CU1);
+			__enable_fpu();
 			save_fp(p);
 		}
 	/* set up new TSS. */
@@ -123,17 +133,62 @@
 	return 0;
 }
 
+extern struct pt_regs *get_task_registers (struct task_struct *task);
+extern void save_fp(struct task_struct *);
+int dump_task_fpu(struct pt_regs *regs, struct task_struct *task, elf_fpregset_t *r)
+{
+	unsigned long long *fregs;
+	int i;
+	unsigned long tmp;
+
+	if (!task->used_math)
+		return 0;
+	if(!(mips_cpu.options & MIPS_CPU_FPU)) {
+		fregs = (unsigned long long *)
+			task->thread.fpu.soft.regs;
+	} else {
+		fregs = (unsigned long long *)
+			&task->thread.fpu.hard.fp_regs[0];
+		if (last_task_used_math == task) {
+			__enable_fpu();
+			save_fp (task);
+			__disable_fpu();
+			last_task_used_math = NULL;
+			regs->cp0_status &= ~ST0_CU1;
+		}
+	}
+	/*
+	 * The odd registers are actually the high
+	 * order bits of the values stored in the even
+	 * registers - unless we're using r2k_switch.S.
+	 */
+	for (i = 0; i < 32; i++)
+	{
+#ifdef CONFIG_CPU_R3000
+		if (mips_cpu.options & MIPS_CPU_FPU)
+			tmp = *(unsigned long *)(fregs + i);
+		else
+#endif
+		if (i & 1)
+			tmp = (unsigned long) (fregs[(i & ~1)] >> 32);
+		else
+			tmp = (unsigned long) (fregs[i] & 0xffffffff);
+
+		*(unsigned long *)(&(*r)[i]) = tmp;
+	}
+
+	if (mips_cpu.options & MIPS_CPU_FPU)
+		tmp = task->thread.fpu.hard.control;
+	else
+		tmp = task->thread.fpu.soft.sr;
+	*(unsigned long *)(&(*r)[32]) = tmp;
+	return 1;
+}
+
 /* Fill in the fpu structure for a core dump.. */
 int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
 {
-	/* We actually store the FPU info in the task->thread
-	 * area.
-	 */
-	if(regs->cp0_status & ST0_CU1) {
-		memcpy(r, &current->thread.fpu, sizeof(current->thread.fpu));
-		return 1;
-	}
-	return 0; /* Task didn't use the fpu at all. */
+	return dump_task_fpu (regs, current, r);
 }
 
 /* Fill in the user structure for a core dump.. */
@@ -174,16 +229,15 @@
 		"1:  addiu   $sp,32           \n"
 		"    move    %0,$2            \n"
 		".set reorder"
-		:"=r" (retval)
-		:"i" (__NR_clone), "i" (__NR_exit),
-		 "r" (arg), "r" (fn),
-		 "r" (flags | CLONE_VM)
+		: "=r" (retval)
+		: "i" (__NR_clone), "i" (__NR_exit), "r" (arg), "r" (fn),
+		  "r" (flags | CLONE_VM)
 		 /*
 		  * The called subroutine might have destroyed any of the
 		  * at, result, argument or temporary registers ...
 		  */
-		:"$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8",
-		 "$9","$10","$11","$12","$13","$14","$15","$24","$25");
+		: "$2", "$3", "$4", "$5", "$6", "$7", "$8",
+		  "$9","$10","$11","$12","$13","$14","$15","$24","$25");
 
 	return retval;
 }