/* SPDX-License-Identifier: GPL-2.0 */
/* 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_NOERROR 2
#define TI_FLAG_BYTE_NOERROR_SHIFT 40
#define TI_FLAG_BYTE_FPDEPTH 3
#define TI_FLAG_FPDEPTH_SHIFT 32
#define TI_FLAG_BYTE_CWP 4
#define TI_FLAG_CWP_SHIFT 24
#define TI_FLAG_BYTE_WSAVED 5
#define TI_FLAG_WSAVED_SHIFT 16
#include <asm /page.h>
#ifndef __ASSEMBLY__
#include <asm /ptrace.h>
#include <asm /types.h>
struct task_struct;
struct thread_info {
/* D$ line 1 */
struct task_struct *task;
unsigned long flags;
__u8 fpsaved[7 ];
__u8 status;
unsigned long ksp;
/* D$ line 2 */
unsigned long fault_address;
struct pt_regs *kregs;
int preempt_count; /* 0 => preemptable, <0 => BUG */
__u8 new_child;
__u8 __pad;
__u16 cpu;
unsigned long *utraps;
struct reg_window reg_window[NSWINS];
unsigned long rwbuf_stkptrs[NSWINS];
unsigned long gsr[7 ];
unsigned long xfsr[7 ];
struct pt_regs *kern_una_regs;
unsigned int kern_una_insn;
unsigned long fpregs[(7 * 256 ) / sizeof (unsigned long )]
__attribute__ ((aligned(64 )));
};
#endif /* !(__ASSEMBLY__) */
/* offsets into the thread_info struct for assembly code access */
#define TI_TASK 0 x00000000
#define TI_FLAGS 0 x00000008
#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_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR)
#define TI_FPSAVED 0 x00000010
#define TI_KSP 0 x00000018
#define TI_FAULT_ADDR 0 x00000020
#define TI_KREGS 0 x00000028
#define TI_PRE_COUNT 0 x00000030
#define TI_NEW_CHILD 0 x00000034
#define TI_CPU 0 x00000036
#define TI_UTRAPS 0 x00000038
#define TI_REG_WINDOW 0 x00000040
#define TI_RWIN_SPTRS 0 x000003c0
#define TI_GSR 0 x000003f8
#define TI_XFSR 0 x00000430
#define TI_KUNA_REGS 0 x00000468
#define TI_KUNA_INSN 0 x00000470
#define TI_FPREGS 0 x00000480
/* We embed this in the uppermost byte of thread_info->flags */
#define FAULT_CODE_WRITE 0 x01 /* Write access, implies D-TLB */
#define FAULT_CODE_DTLB 0 x02 /* Miss happened in D-TLB */
#define FAULT_CODE_ITLB 0 x04 /* Miss happened in I-TLB */
#define FAULT_CODE_WINFIXUP 0 x08 /* Miss happened during spill/fill */
#define FAULT_CODE_BLKCOMMIT 0 x10 /* Use blk-commit ASI in copy_page */
#define FAULT_CODE_BAD_RA 0 x20 /* Bad RA for sun4v */
#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, \
.preempt_count = INIT_PREEMPT_COUNT, \
.kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \
}
/* how to get the thread information struct from C */
#ifndef BUILD_VDSO
register struct thread_info *current_thread_info_reg asm ("g6" );
#define current_thread_info() (current_thread_info_reg)
#else
extern struct thread_info *current_thread_info(void );
#endif
/* thread information allocation */
#if PAGE_SHIFT == 13
#define THREAD_SIZE_ORDER 1
#else /* PAGE_SHIFT == 13 */
#define THREAD_SIZE_ORDER 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_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (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
* 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 /* callback before returning to user */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_NOTIFY_SIGNAL 4 /* signal notifications exist */
#define TIF_UNALIGNED 5 /* allowed to do unaligned accesses */
#define TIF_UPROBE 6 /* breakpointed or singlestepped */
#define TIF_32BIT 7 /* 32-bit binary */
#define TIF_NOHZ 8 /* in adaptive nohz mode */
#define TIF_SECCOMP 9 /* secure computing */
#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
#define TIF_SYSCALL_TRACEPOINT 11 /* syscall tracepoint instrumentation */
/* NOTE: Thread flags >= 12 should be ones we have no interest
* in using in assembly , else we can ' t use the mask as
* an immediate value in instructions such as andcc .
*/
#define TIF_MCDPER 12 /* Precise MCD exception */
#define TIF_MEMDIE 13 /* is terminating due to OOM killer */
#define TIF_POLLING_NRFLAG 14
#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_NOTIFY_SIGNAL (1 <<TIF_NOTIFY_SIGNAL)
#define _TIF_UNALIGNED (1 <<TIF_UNALIGNED)
#define _TIF_UPROBE (1 <<TIF_UPROBE)
#define _TIF_32BIT (1 <<TIF_32BIT)
#define _TIF_NOHZ (1 <<TIF_NOHZ)
#define _TIF_SECCOMP (1 <<TIF_SECCOMP)
#define _TIF_SYSCALL_AUDIT (1 <<TIF_SYSCALL_AUDIT)
#define _TIF_SYSCALL_TRACEPOINT (1 <<TIF_SYSCALL_TRACEPOINT)
#define _TIF_POLLING_NRFLAG (1 <<TIF_POLLING_NRFLAG)
#define _TIF_USER_WORK_MASK ((0 xff << TI_FLAG_WSAVED_SHIFT) | \
_TIF_DO_NOTIFY_RESUME_MASK | \
_TIF_NEED_RESCHED)
#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \
_TIF_SIGPENDING | _TIF_UPROBE | \
_TIF_NOTIFY_SIGNAL)
#define is_32bit_task() (test_thread_flag(TIF_32BIT))
/*
* Thread - synchronous status .
*
* This is different from the flags in that nobody else
* ever touches our thread - synchronous status , so we don ' t
* have to worry about atomic accesses .
*
* Note that there are only 8 bits available .
*/
#ifndef __ASSEMBLY__
#define thread32_stack_is_64bit(__SP) (((__SP) & 0 x1) != 0 )
#define test_thread_64bit_stack(__SP) \
((test_thread_flag(TIF_32BIT) && !thread32_stack_is_64bit(__SP)) ? \
false : true )
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_THREAD_INFO_H */
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