Import of Linux/MIPS 1.1.68

1 files changed, 67 insertions, 350 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3a38d57eb..76519a8b9 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -15,26 +15,6 @@
  * System setup and hardware bug flags..
  */
 extern int hard_math;
-extern int x86;
-extern int ignore_irq13;
-extern int wp_works_ok;		/* doesn't work on a 386 */
-extern int hlt_works_ok;	/* problems on some 486Dx4's and old 386's */
-
-extern unsigned long intr_count;
-extern unsigned long event;
-
-#define start_bh_atomic() \
-__asm__ __volatile__("incl _intr_count")
-
-#define end_bh_atomic() \
-__asm__ __volatile__("decl _intr_count")
-
-/*
- * Bus types (default is ISA, but people can check others with these..)
- * MCA_bus hardcoded to 0 for now.
- */
-extern int EISA_bus;
-#define MCA_bus 0
 
 #include <linux/binfmts.h>
 #include <linux/personality.h>
@@ -42,17 +22,6 @@ extern int EISA_bus;
 #include <asm/system.h>
 
 /*
- * User space process size: 3GB. This is hardcoded into a few places,
- * so don't change it unless you know what you are doing.
- */
-#define TASK_SIZE	0xc0000000
-
-/*
- * Size of io_bitmap in longwords: 32 is ports 0-0x3ff.
- */
-#define IO_BITMAP_SIZE	32
-
-/*
  * These are the constant used to fake the fixed-point load-average
  * counting. Some notes:
  *  - 11 bit fractions expand to 22 bits by the multiplies: this gives
@@ -62,22 +31,22 @@ extern int EISA_bus;
  *    the EXP_n values would be 1981, 2034 and 2043 if still using only
  *    11 bit fractions.
  */
-extern unsigned long avenrun[];		/* Load averages */
+extern unsigned long avenrun[];         /* Load averages */
 
-#define FSHIFT		11		/* nr of bits of precision */
-#define FIXED_1		(1<<FSHIFT)	/* 1.0 as fixed-point */
-#define LOAD_FREQ	(5*HZ)		/* 5 sec intervals */
-#define EXP_1		1884		/* 1/exp(5sec/1min) as fixed-point */
-#define EXP_5		2014		/* 1/exp(5sec/5min) */
-#define EXP_15		2037		/* 1/exp(5sec/15min) */
+#define FSHIFT          11              /* nr of bits of precision */
+#define FIXED_1         (1<<FSHIFT)     /* 1.0 as fixed-point */
+#define LOAD_FREQ       (5*HZ)          /* 5 sec intervals */
+#define EXP_1           1884            /* 1/exp(5sec/1min) as fixed-point */
+#define EXP_5           2014            /* 1/exp(5sec/5min) */
+#define EXP_15          2037            /* 1/exp(5sec/15min) */
 
 #define CALC_LOAD(load,exp,n) \
 	load *= exp; \
 	load += n*(FIXED_1-exp); \
 	load >>= FSHIFT;
 
-#define CT_TO_SECS(x)	((x) / HZ)
-#define CT_TO_USECS(x)	(((x) % HZ) * 1000000/HZ)
+#define CT_TO_SECS(x)   ((x) / HZ)
+#define CT_TO_USECS(x)  (((x) % HZ) * 1000000/HZ)
 
 #define FIRST_TASK task[0]
 #define LAST_TASK task[NR_TASKS-1]
@@ -89,16 +58,16 @@ extern unsigned long avenrun[];		/* Load averages */
 #include <linux/time.h>
 #include <linux/param.h>
 #include <linux/resource.h>
-#include <linux/vm86.h>
+/* #include <linux/vm86.h> */
 #include <linux/math_emu.h>
 #include <linux/ptrace.h>
 
-#define TASK_RUNNING		0
-#define TASK_INTERRUPTIBLE	1
-#define TASK_UNINTERRUPTIBLE	2
-#define TASK_ZOMBIE		3
-#define TASK_STOPPED		4
-#define TASK_SWAPPING		5
+#define TASK_RUNNING            0
+#define TASK_INTERRUPTIBLE      1
+#define TASK_UNINTERRUPTIBLE    2
+#define TASK_ZOMBIE             3
+#define TASK_STOPPED            4
+#define TASK_SWAPPING           5
 
 #ifndef NULL
 #define NULL ((void *) 0)
@@ -114,82 +83,6 @@ asmlinkage void schedule(void);
 
 #endif /* __KERNEL__ */
 
-struct i387_hard_struct {
-	long	cwd;
-	long	swd;
-	long	twd;
-	long	fip;
-	long	fcs;
-	long	foo;
-	long	fos;
-	long	st_space[20];	/* 8*10 bytes for each FP-reg = 80 bytes */
-};
-
-struct i387_soft_struct {
-	long	cwd;
-	long	swd;
-	long	twd;
-	long	fip;
-	long	fcs;
-	long	foo;
-	long	fos;
-	long    top;
-	struct fpu_reg	regs[8];	/* 8*16 bytes for each FP-reg = 128 bytes */
-	unsigned char	lookahead;
-	struct info	*info;
-	unsigned long	entry_eip;
-};
-
-union i387_union {
-	struct i387_hard_struct hard;
-	struct i387_soft_struct soft;
-};
-
-struct tss_struct {
-	unsigned short	back_link,__blh;
-	unsigned long	esp0;
-	unsigned short	ss0,__ss0h;
-	unsigned long	esp1;
-	unsigned short	ss1,__ss1h;
-	unsigned long	esp2;
-	unsigned short	ss2,__ss2h;
-	unsigned long	cr3;
-	unsigned long	eip;
-	unsigned long	eflags;
-	unsigned long	eax,ecx,edx,ebx;
-	unsigned long	esp;
-	unsigned long	ebp;
-	unsigned long	esi;
-	unsigned long	edi;
-	unsigned short	es, __esh;
-	unsigned short	cs, __csh;
-	unsigned short	ss, __ssh;
-	unsigned short	ds, __dsh;
-	unsigned short	fs, __fsh;
-	unsigned short	gs, __gsh;
-	unsigned short	ldt, __ldth;
-	unsigned short	trace, bitmap;
-	unsigned long	io_bitmap[IO_BITMAP_SIZE+1];
-	unsigned long	tr;
-	unsigned long	cr2, trap_no, error_code;
-	union i387_union i387;
-};
-
-#define INIT_TSS  { \
-	0,0, \
-	sizeof(init_kernel_stack) + (long) &init_kernel_stack, \
-	KERNEL_DS, 0, \
-	0,0,0,0,0,0, \
-	(long) &swapper_pg_dir, \
-	0,0,0,0,0,0,0,0,0,0, \
-	USER_DS,0,USER_DS,0,USER_DS,0,USER_DS,0,USER_DS,0,USER_DS,0, \
-	_LDT(0),0, \
-	0, 0x8000, \
-	{~0, }, /* ioperm */ \
-	_TSS(0), 0, 0,0, \
-	{ { 0, }, }  /* 387 state */ \
-}
-
 struct files_struct {
 	int count;
 	fd_set close_on_exec;
@@ -223,9 +116,10 @@ struct mm_struct {
 	unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
 	int swappable:1;
 	unsigned long swap_address;
-	unsigned long old_maj_flt;	/* old value of maj_flt */
-	unsigned long dec_flt;		/* page fault count of the last time */
-	unsigned long swap_cnt;		/* number of pages to swap on next pass */
+	unsigned long old_maj_flt;      /* old value of maj_flt */
+	unsigned long dec_flt;          /* page fault count of the last time */
+	unsigned long swap_cnt;         /* number of pages to swap on next pass
+*/
 	struct vm_area_struct * mmap;
 };
 
@@ -242,113 +136,22 @@ struct mm_struct {
 /* swap */	0, 0, 0, 0, \
 		&init_mmap }
 
-struct task_struct {
-/* these are hardcoded - don't touch */
-	volatile long state;	/* -1 unrunnable, 0 runnable, >0 stopped */
-	long counter;
-	long priority;
-	unsigned long signal;
-	unsigned long blocked;	/* bitmap of masked signals */
-	unsigned long flags;	/* per process flags, defined below */
-	int errno;
-	int debugreg[8];  /* Hardware debugging registers */
-	struct exec_domain *exec_domain;
-/* various fields */
-	struct linux_binfmt *binfmt;
-	struct task_struct *next_task, *prev_task;
-	struct sigaction sigaction[32];
-	unsigned long saved_kernel_stack;
-	unsigned long kernel_stack_page;
-	int exit_code, exit_signal;
-	unsigned long personality;
-	int dumpable:1;
-	int did_exec:1;
-	int pid,pgrp,session,leader;
-	int	groups[NGROUPS];
-	/* 
-	 * pointers to (original) parent process, youngest child, younger sibling,
-	 * older sibling, respectively.  (p->father can be replaced with 
-	 * p->p_pptr->pid)
-	 */
-	struct task_struct *p_opptr, *p_pptr, *p_cptr, *p_ysptr, *p_osptr;
-	struct wait_queue *wait_chldexit;	/* for wait4() */
-	unsigned short uid,euid,suid,fsuid;
-	unsigned short gid,egid,sgid,fsgid;
-	unsigned long timeout;
-	unsigned long it_real_value, it_prof_value, it_virt_value;
-	unsigned long it_real_incr, it_prof_incr, it_virt_incr;
-	long utime, stime, cutime, cstime, start_time;
-	struct rlimit rlim[RLIM_NLIMITS]; 
-	unsigned short used_math;
-	char comm[16];
-/* virtual 86 mode stuff */
-	struct vm86_struct * vm86_info;
-	unsigned long screen_bitmap;
-	unsigned long v86flags, v86mask, v86mode;
-/* file system info */
-	int link_count;
-	struct tty_struct *tty; /* NULL if no tty */
-/* ipc stuff */
-	struct sem_undo *semundo;
-/* ldt for this task - used by Wine.  If NULL, default_ldt is used */
-	struct desc_struct *ldt;
-/* tss for this task */
-	struct tss_struct tss;
-/* filesystem information */
-	struct fs_struct fs[1];
-/* open file information */
-	struct files_struct files[1];
-/* memory management info */
-	struct mm_struct mm[1];
-};
-
 /*
  * Per process flags
  */
-#define PF_ALIGNWARN	0x00000001	/* Print alignment warning msgs */
+#define PF_ALIGNWARN    0x00000001	/* Print alignment warning msgs */
 					/* Not implemented yet, only for 486*/
-#define PF_PTRACED	0x00000010	/* set if ptrace (0) has been called. */
-#define PF_TRACESYS	0x00000020	/* tracing system calls */
+#define PF_PTRACED      0x00000010	/* set if ptrace (0) has been called. */
+#define PF_TRACESYS     0x00000020	/* tracing system calls */
 
 /*
  * cloning flags:
  */
 #define CSIGNAL		0x000000ff	/* signal mask to be sent at exit */
-#define COPYVM		0x00000100	/* set if VM copy desired (like normal fork()) */
-#define COPYFD		0x00000200	/* set if fd's should be copied, not shared (NI) */
-
-/*
- *  INIT_TASK is used to set up the first task table, touch at
- * your own risk!. Base=0, limit=0x1fffff (=2MB)
- */
-#define INIT_TASK \
-/* state etc */	{ 0,15,15,0,0,0,0, \
-/* debugregs */ { 0, },            \
-/* exec domain */&default_exec_domain, \
-/* binfmt */	NULL, \
-/* schedlink */	&init_task,&init_task, \
-/* signals */	{{ 0, },}, \
-/* stack */	0,(unsigned long) &init_kernel_stack, \
-/* ec,brk... */	0,0,0,0,0, \
-/* pid etc.. */	0,0,0,0, \
-/* suppl grps*/ {NOGROUP,}, \
-/* proc links*/ &init_task,&init_task,NULL,NULL,NULL,NULL, \
-/* uid etc */	0,0,0,0,0,0,0,0, \
-/* timeout */	0,0,0,0,0,0,0,0,0,0,0,0, \
-/* rlimits */   { {LONG_MAX, LONG_MAX}, {LONG_MAX, LONG_MAX},  \
-		  {LONG_MAX, LONG_MAX}, {LONG_MAX, LONG_MAX},  \
-		  {       0, LONG_MAX}, {LONG_MAX, LONG_MAX}}, \
-/* math */	0, \
-/* comm */	"swapper", \
-/* vm86_info */	NULL, 0, 0, 0, 0, \
-/* fs info */	0,NULL, \
-/* ipc */	NULL, \
-/* ldt */	NULL, \
-/* tss */	INIT_TSS, \
-/* fs */	{ INIT_FS }, \
-/* files */	{ INIT_FILES }, \
-/* mm */	{ INIT_MM } \
-}
+#define COPYVM		0x00000100	/* set if VM copy desired (like normal f
+ork()) */
+#define COPYFD		0x00000200	/* set if fd's should be copied, not sha
+red (NI) */
 
 #ifdef __KERNEL__
 
@@ -373,98 +176,31 @@ extern void notify_parent(struct task_struct * tsk);
 extern int send_sig(unsigned long sig,struct task_struct * p,int priv);
 extern int in_group_p(gid_t grp);
 
-extern int request_irq(unsigned int irq,void (*handler)(int), unsigned long flags, const char *device);
+extern int request_irq(unsigned int irq,void (*handler)(int),
+                       unsigned long flags, const char *device);
 extern void free_irq(unsigned int irq);
 
 /*
- * Entry into gdt where to find first TSS. GDT layout:
- *   0 - nul
- *   1 - kernel code segment
- *   2 - kernel data segment
- *   3 - user code segment
- *   4 - user data segment
- * ...
- *   8 - TSS #0
- *   9 - LDT #0
- *  10 - TSS #1
- *  11 - LDT #1
- */
-#define FIRST_TSS_ENTRY 8
-#define FIRST_LDT_ENTRY (FIRST_TSS_ENTRY+1)
-#define _TSS(n) ((((unsigned long) n)<<4)+(FIRST_TSS_ENTRY<<3))
-#define _LDT(n) ((((unsigned long) n)<<4)+(FIRST_LDT_ENTRY<<3))
-#define load_TR(n) __asm__("ltr %%ax": /* no output */ :"a" (_TSS(n)))
-#define load_ldt(n) __asm__("lldt %%ax": /* no output */ :"a" (_LDT(n)))
-#define store_TR(n) \
-__asm__("str %%ax\n\t" \
-	"subl %2,%%eax\n\t" \
-	"shrl $4,%%eax" \
-	:"=a" (n) \
-	:"0" (0),"i" (FIRST_TSS_ENTRY<<3))
-/*
- *	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.
- * This also clears the TS-flag if the task we switched to has used
- * tha math co-processor latest.
- */
-#define switch_to(tsk) \
-__asm__("cli\n\t" \
-	"xchgl %%ecx,_current\n\t" \
-	"ljmp %0\n\t" \
-	"sti\n\t" \
-	"cmpl %%ecx,_last_task_used_math\n\t" \
-	"jne 1f\n\t" \
-	"clts\n" \
-	"1:" \
-	: /* no output */ \
-	:"m" (*(((char *)&tsk->tss.tr)-4)), \
-	 "c" (tsk) \
-	:"cx")
-
-#define _set_base(addr,base) \
-__asm__("movw %%dx,%0\n\t" \
-	"rorl $16,%%edx\n\t" \
-	"movb %%dl,%1\n\t" \
-	"movb %%dh,%2" \
-	: /* no output */ \
-	:"m" (*((addr)+2)), \
-	 "m" (*((addr)+4)), \
-	 "m" (*((addr)+7)), \
-	 "d" (base) \
-	:"dx")
-
-#define _set_limit(addr,limit) \
-__asm__("movw %%dx,%0\n\t" \
-	"rorl $16,%%edx\n\t" \
-	"movb %1,%%dh\n\t" \
-	"andb $0xf0,%%dh\n\t" \
-	"orb %%dh,%%dl\n\t" \
-	"movb %%dl,%1" \
-	: /* no output */ \
-	:"m" (*(addr)), \
-	 "m" (*((addr)+6)), \
-	 "d" (limit) \
-	:"dx")
-
-#define set_base(ldt,base) _set_base( ((char *)&(ldt)) , base )
-#define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , (limit-1)>>12 )
-
-/*
  * The wait-queues are circular lists, and you have to be *very* sure
  * to keep them correct. Use only these two functions to add/remove
  * entries in the queues.
  */
-extern inline void add_wait_queue(struct wait_queue ** p, struct wait_queue * wait)
+extern inline void add_wait_queue(struct wait_queue ** p,
+                                  struct wait_queue * wait)
 {
-	unsigned long flags;
+        unsigned long flags;
 
-#ifdef DEBUG
+#if defined (DEBUG) && defined (__mips__)
+	/*
+	 * FIXME: I don't work for MIPS yet
+	 */
 	if (wait->next) {
 		unsigned long pc;
 		__asm__ __volatile__("call 1f\n"
 			"1:\tpopl %0":"=r" (pc));
-		printk("add_wait_queue (%08x): wait->next = %08x\n",pc,(unsigned long) wait->next);
-	}
+		printk("add_wait_queue (%08x): wait->next = %08x\n",pc,
+		       (unsigned long) wait->next);
+        }
 #endif
 	save_flags(flags);
 	cli();
@@ -478,27 +214,37 @@ extern inline void add_wait_queue(struct wait_queue ** p, struct wait_queue * wa
 	restore_flags(flags);
 }
 
-extern inline void remove_wait_queue(struct wait_queue ** p, struct wait_queue * wait)
+extern inline void remove_wait_queue(struct wait_queue ** p,
+                                     struct wait_queue *wait)
 {
 	unsigned long flags;
 	struct wait_queue * tmp;
-#ifdef DEBUG
+#if defined (DEBUG) && !defined(__mips__)
+	/*
+	 * FIXME: I don't work for MIPS yet
+	 */
 	unsigned long ok = 0;
 #endif
 
 	save_flags(flags);
 	cli();
 	if ((*p == wait) &&
-#ifdef DEBUG
+#if defined (DEBUG) && !defined(__mips__)
+	/*
+	 * FIXME: I don't work for MIPS yet
+	 */
 	    (ok = 1) &&
 #endif
 	    ((*p = wait->next) == wait)) {
 		*p = NULL;
-	} else {
+		} else {
 		tmp = wait;
 		while (tmp->next != wait) {
 			tmp = tmp->next;
-#ifdef DEBUG
+#if defined (DEBUG) && !defined(__mips__)
+			/*
+			 * FIXME: I don't work for MIPS yet
+			 */
 			if (tmp == *p)
 				ok = 1;
 #endif
@@ -507,17 +253,22 @@ extern inline void remove_wait_queue(struct wait_queue ** p, struct wait_queue *
 	}
 	wait->next = NULL;
 	restore_flags(flags);
-#ifdef DEBUG
+#if defined (DEBUG) && !defined(__mips__)
+	/*
+	 * FIXME: I don't work for MIPS yet
+	 */
 	if (!ok) {
 		printk("removed wait_queue not on list.\n");
-		printk("list = %08x, queue = %08x\n",(unsigned long) p, (unsigned long) wait);
+		printk("list = %08x, queue = %08x\n",(unsigned long) p, (unsigne
+d long) wait);
 		__asm__("call 1f\n1:\tpopl %0":"=r" (ok));
 		printk("eip = %08x\n",ok);
 	}
 #endif
 }
 
-extern inline void select_wait(struct wait_queue ** wait_address, select_table * p)
+extern inline void select_wait(struct wait_queue ** wait_address,
+                               select_table *p)
 {
 	struct select_table_entry * entry;
 
@@ -525,7 +276,7 @@ extern inline void select_wait(struct wait_queue ** wait_address, select_table *
 		return;
 	if (p->nr >= __MAX_SELECT_TABLE_ENTRIES)
 		return;
- 	entry = p->entry + p->nr;
+	entry = p->entry + p->nr;
 	entry->wait_address = wait_address;
 	entry->wait.task = current;
 	entry->wait.next = NULL;
@@ -549,30 +300,6 @@ extern inline void up(struct semaphore * sem)
 {
 	sem->count++;
 	wake_up(&sem->wait);
-}	
-
-static inline unsigned long _get_base(char * addr)
-{
-	unsigned long __base;
-	__asm__("movb %3,%%dh\n\t"
-		"movb %2,%%dl\n\t"
-		"shll $16,%%edx\n\t"
-		"movw %1,%%dx"
-		:"=&d" (__base)
-		:"m" (*((addr)+2)),
-		 "m" (*((addr)+4)),
-		 "m" (*((addr)+7)));
-	return __base;
-}
-
-#define get_base(ldt) _get_base( ((char *)&(ldt)) )
-
-static inline unsigned long get_limit(unsigned long segment)
-{
-	unsigned long __limit;
-	__asm__("lsll %1,%0"
-		:"=r" (__limit):"r" (segment));
-	return __limit+1;
 }
 
 #define REMOVE_LINKS(p) do { unsigned long flags; \
@@ -604,21 +331,11 @@ static inline unsigned long get_limit(unsigned long segment)
 #define for_each_task(p) \
 	for (p = &init_task ; (p = p->next_task) != &init_task ; )
 
+#endif /* __KERNEL__ */
+
 /*
- * This is the ldt that every process will get unless we need
- * something other than this.
+ * Include machine dependent stuff
  */
-extern struct desc_struct default_ldt;
-
-/* This special macro can be used to load a debugging register */
-
-#define loaddebug(register) \
-		__asm__("movl %0,%%edx\n\t" \
-			"movl %%edx,%%db" #register "\n\t" \
-			: /* no output */ \
-			:"m" (current->debugreg[register]) \
-			:"dx");
-
-#endif /* __KERNEL__ */
+#include <asm/sched.h>
 
 #endif