Forgotten commit.

1 files changed, 210 insertions, 0 deletions

diff --git a/include/asm-sparc64/thread_info.h b/include/asm-sparc64/thread_info.h
new file mode 100644
index 000000000..35d2e003e
--- /dev/null
+++ b/include/asm-sparc64/thread_info.h
@@ -0,0 +1,210 @@
+/* $Id: thread_info.h,v 1.1 2002-02-10 00:00:58 davem Exp $
+ * thread_info.h: sparc64 low-level thread information
+ *
+ * Copyright (C) 2002  David S. Miller (davem@redhat.com)
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#define NSWINS		7
+
+#define TI_FLAG_BYTE_FAULT_CODE		0
+#define TI_FLAG_FAULT_CODE_SHIFT	56
+#define TI_FLAG_BYTE_WSTATE		1
+#define TI_FLAG_WSTATE_SHIFT		48
+#define TI_FLAG_BYTE_CWP		2
+#define TI_FLAG_CWP_SHIFT		40
+#define TI_FLAG_BYTE_CURRENT_DS		3
+#define TI_FLAG_CURRENT_DS_SHIFT	32
+#define TI_FLAG_BYTE_FPDEPTH		4
+#define TI_FLAG_FPDEPTH_SHIFT		24
+#define TI_FLAG_BYTE_WSAVED		5
+#define TI_FLAG_WSAVED_SHIFT		16
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace.h>
+
+struct task_struct;
+struct exec_domain;
+
+struct thread_info {
+	/* D$ line 1 */
+	struct task_struct	*task;
+	unsigned long		flags;
+	__u8			cpu;
+	__u8			fpsaved[7];
+	unsigned long		ksp;
+
+	/* D$ line 2 */
+	unsigned long		fault_address;
+	struct pt_regs		*kregs;
+	unsigned long		*utraps;
+	struct exec_domain	*exec_domain;
+
+	struct reg_window 	reg_window[NSWINS];
+	unsigned long 		rwbuf_stkptrs[NSWINS];
+
+	unsigned long		gsr[7];
+	unsigned long		xfsr[7];
+
+	__u64			*user_cntd0, *user_cntd1;
+	__u64			kernel_cntd0, kernel_cntd1;
+	__u64			pcr_reg;
+
+	__u64			cee_stuff;
+
+	unsigned long		fpregs[0] __attribute__ ((aligned(64)));
+};
+
+#endif /* !(__ASSEMBLY__) */
+
+/* offsets into the thread_info struct for assembly code access */
+#define TI_TASK		0x00000000
+#define TI_FLAGS	0x00000008
+#define TI_FAULT_CODE	(TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
+#define TI_WSTATE	(TI_FLAGS + TI_FLAG_BYTE_WSTATE)
+#define TI_CWP		(TI_FLAGS + TI_FLAG_BYTE_CWP)
+#define TI_CURRENT_DS	(TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
+#define TI_FPDEPTH	(TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
+#define TI_WSAVED	(TI_FLAGS + TI_FLAG_BYTE_WSAVED)
+#define TI_CPU		0x00000010
+#define TI_FPSAVED	0x00000011
+#define TI_KSP		0x00000018
+#define TI_FAULT_ADDR	0x00000020
+#define TI_KREGS	0x00000028
+#define TI_UTRAPS	0x00000030
+#define TI_EXEC_DOMAIN	0x00000038
+#define TI_REG_WINDOW	0x00000040
+#define TI_RWIN_SPTRS	0x000003c0	
+#define TI_GSR		0x000003f8
+#define TI_XFSR		0x00000430
+#define TI_USER_CNTD0	0x00000468
+#define TI_USER_CNTD1	0x00000470
+#define TI_KERN_CNTD0	0x00000478
+#define TI_KERN_CNTD1	0x00000480
+#define TI_PCR		0x00000488
+#define TI_CEE_STUFF	0x00000490
+#define TI_FPREGS	0x000004c0
+
+/* We embed this in the uppermost byte of thread_info->flags */
+#define FAULT_CODE_WRITE	0x01	/* Write access, implies D-TLB		*/
+#define FAULT_CODE_DTLB		0x02	/* Miss happened in D-TLB		*/
+#define FAULT_CODE_ITLB		0x04	/* Miss happened in I-TLB		*/
+#define FAULT_CODE_WINFIXUP	0x08	/* Miss happened during spill/fill	*/
+
+#if PAGE_SHIFT == 13
+#define THREAD_SIZE (2*PAGE_SIZE)
+#define THREAD_SHIFT (PAGE_SHIFT + 1)
+#else /* PAGE_SHIFT == 13 */
+#define THREAD_SIZE PAGE_SIZE
+#define THREAD_SHIFT PAGE_SHIFT
+#endif /* PAGE_SHIFT == 13 */
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#ifndef __ASSEMBLY__
+
+#define INIT_THREAD_INFO(tsk)				\
+{							\
+	task:		&tsk,				\
+	flags:		((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT,	\
+	exec_domain:	&default_exec_domain,		\
+}
+
+#define init_thread_info	(init_thread_union.thread_info)
+#define init_stack		(init_thread_union.stack)
+
+/* how to get the thread information struct from C */
+register struct thread_info *current_thread_info_reg asm("g6");
+#define current_thread_info()	(current_thread_info_reg)
+
+/* thread information allocation */
+#if PAGE_SHIFT == 13
+#define alloc_thread_info()   ((struct thread_info *)__get_free_pages(GFP_KERNEL, 1))
+#define free_thread_info(ti)  free_pages((unsigned long)(ti),1)
+#else /* PAGE_SHIFT == 13 */
+#define alloc_thread_info()   ((struct thread_info *)__get_free_pages(GFP_KERNEL, 0))
+#define free_thread_info(ti)  free_pages((unsigned long)(ti),0)
+#endif /* PAGE_SHIFT == 13 */
+
+#define __thread_flag_byte_ptr(ti)	\
+	((unsigned char *)(&((ti)->flags)))
+#define __cur_thread_flag_byte_ptr	__thread_flag_byte_ptr(current_thread_info())
+
+#define get_thread_fault_code()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE])
+#define set_thread_fault_code(val)	(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FAULT_CODE] = (val))
+#define get_thread_wstate()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE])
+#define set_thread_wstate(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
+#define get_thread_cwp()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
+#define set_thread_cwp(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
+#define get_thread_current_ds()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
+#define set_thread_current_ds(val)	(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
+#define get_thread_fpdepth()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
+#define set_thread_fpdepth(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
+#define get_thread_wsaved()		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
+#define set_thread_wsaved(val)		(__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
+
+#endif /* !(__ASSEMBLY__) */
+
+/*
+ * Thread information flags, only 16 bits are available as we encode
+ * other values into the upper 6 bytes.
+ *
+ * On trap return we need to test several values:
+ *
+ * user:	need_resched, notify_resume, sigpending, wsaved, perfctr
+ * kernel:	fpdepth
+ *
+ * So to check for work in the kernel case we simply load the fpdepth
+ * byte out of the flags and test it.  For the user case we encode the
+ * lower 3 bytes of flags as follows:
+ *	----------------------------------------
+ *	| wsaved | flags byte 1 | flags byte 2 |
+ *	----------------------------------------
+ * This optimizes the user test into:
+ *	ldx		[%g6 + TI_FLAGS], REG1
+ *	sethi		%hi(_TIF_USER_WORK_MASK), REG2
+ *	or		REG2, %lo(_TIF_USER_WORK_MASK), REG2
+ *	andcc		REG1, REG2, %g0
+ *	be,pt		no_work_to_do
+ *	 nop
+ */
+#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
+#define TIF_NOTIFY_RESUME	1	/* resumption notification requested */
+#define TIF_SIGPENDING		2	/* signal pending */
+#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
+#define TIF_PERFCTR		4	/* performance counters active */
+#define TIF_UNALIGNED		5	/* allowed to do unaligned accesses */
+#define TIF_NEWSIGNALS		6	/* wants new-style signals */
+#define TIF_32BIT		7	/* 32-bit binary */
+#define TIF_NEWCHILD		8	/* just-spawned child process */
+
+/* XXX Make this one FAULT_CODE_BLKCOMMIT XXX */
+#define TIF_BLKCOMMIT		9	/* use ASI_BLK_COMMIT_* in copy_user_page */
+
+#define TIF_POLLING_NRFLAG	10
+
+#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
+#define _TIF_PERFCTR		(1<<TIF_PERFCTR)
+#define _TIF_UNALIGNED		(1<<TIF_UNALIGNED)
+#define _TIF_NEWSIGNALS		(1<<TIF_NEWSIGNALS)
+#define _TIF_32BIT		(1<<TIF_32BIT)
+#define _TIF_NEWCHILD		(1<<TIF_NEWCHILD)
+#define _TIF_BLKCOMMIT		(1<<TIF_BLKCOMMIT)
+#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
+
+#define _TIF_USER_WORK_MASK	((0xff << TI_FLAG_WSAVED_SHIFT) | \
+				 (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
+				  _TIF_NEED_RESCHED | _TIF_PERFCTR))
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */