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Diffstat (limited to 'arch/sparc/include/asm/thread_info_64.h')
-rw-r--r--arch/sparc/include/asm/thread_info_64.h281
1 files changed, 281 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
new file mode 100644
index 000000000000..c0a737d7292c
--- /dev/null
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -0,0 +1,281 @@
+/* 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
+
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace.h>
+#include <asm/types.h>
+
+struct task_struct;
+struct exec_domain;
+
+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;
+ struct exec_domain *exec_domain;
+ int preempt_count; /* 0 => preemptable, <0 => BUG */
+ __u8 new_child;
+ __u8 syscall_noerror;
+ __u16 cpu;
+
+ unsigned long *utraps;
+
+ struct reg_window reg_window[NSWINS];
+ unsigned long rwbuf_stkptrs[NSWINS];
+
+ unsigned long gsr[7];
+ unsigned long xfsr[7];
+
+ __u64 __user *user_cntd0;
+ __u64 __user *user_cntd1;
+ __u64 kernel_cntd0, kernel_cntd1;
+ __u64 pcr_reg;
+
+ struct restart_block restart_block;
+
+ struct pt_regs *kern_una_regs;
+ unsigned int kern_una_insn;
+
+ 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_FPSAVED 0x00000010
+#define TI_KSP 0x00000018
+#define TI_FAULT_ADDR 0x00000020
+#define TI_KREGS 0x00000028
+#define TI_EXEC_DOMAIN 0x00000030
+#define TI_PRE_COUNT 0x00000038
+#define TI_NEW_CHILD 0x0000003c
+#define TI_SYS_NOERROR 0x0000003d
+#define TI_CPU 0x0000003e
+#define TI_UTRAPS 0x00000040
+#define TI_REG_WINDOW 0x00000048
+#define TI_RWIN_SPTRS 0x000003c8
+#define TI_GSR 0x00000400
+#define TI_XFSR 0x00000438
+#define TI_USER_CNTD0 0x00000470
+#define TI_USER_CNTD1 0x00000478
+#define TI_KERN_CNTD0 0x00000480
+#define TI_KERN_CNTD1 0x00000488
+#define TI_PCR 0x00000490
+#define TI_RESTART_BLOCK 0x00000498
+#define TI_KUNA_REGS 0x000004c0
+#define TI_KUNA_INSN 0x000004c8
+#define TI_FPREGS 0x00000500
+
+/* 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 */
+#define FAULT_CODE_BLKCOMMIT 0x10 /* Use blk-commit ASI in copy_page */
+
+#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 */
+
+#define PREEMPT_ACTIVE 0x4000000
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#ifndef __ASSEMBLY__
+
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .flags = ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT, \
+ .exec_domain = &default_exec_domain, \
+ .preempt_count = 1, \
+ .restart_block = { \
+ .fn = do_no_restart_syscall, \
+ }, \
+}
+
+#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 __THREAD_INFO_ORDER 1
+#else /* PAGE_SHIFT == 13 */
+#define __THREAD_INFO_ORDER 0
+#endif /* PAGE_SHIFT == 13 */
+
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(tsk) \
+({ \
+ struct thread_info *ret; \
+ \
+ ret = (struct thread_info *) \
+ __get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER); \
+ if (ret) \
+ memset(ret, 0, PAGE_SIZE<<__THREAD_INFO_ORDER); \
+ ret; \
+})
+#else
+#define alloc_thread_info(tsk) \
+ ((struct thread_info *)__get_free_pages(GFP_KERNEL, __THREAD_INFO_ORDER))
+#endif
+
+#define free_thread_info(ti) \
+ free_pages((unsigned long)(ti),__THREAD_INFO_ORDER)
+
+#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 /* callback before returning to user */
+#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 */
+/* flag bit 6 is available */
+#define TIF_32BIT 7 /* 32-bit binary */
+/* flag bit 8 is available */
+#define TIF_SECCOMP 9 /* secure computing */
+#define TIF_SYSCALL_AUDIT 10 /* syscall auditing active */
+/* flag bit 11 is available */
+/* 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_ABI_PENDING 12
+#define TIF_MEMDIE 13
+#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_PERFCTR (1<<TIF_PERFCTR)
+#define _TIF_UNALIGNED (1<<TIF_UNALIGNED)
+#define _TIF_32BIT (1<<TIF_32BIT)
+#define _TIF_SECCOMP (1<<TIF_SECCOMP)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
+#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
+
+#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
+ _TIF_DO_NOTIFY_RESUME_MASK | \
+ _TIF_NEED_RESCHED | _TIF_PERFCTR)
+#define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING)
+
+/*
+ * 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.
+ */
+#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
+
+#ifndef __ASSEMBLY__
+#define HAVE_SET_RESTORE_SIGMASK 1
+static inline void set_restore_sigmask(void)
+{
+ struct thread_info *ti = current_thread_info();
+ ti->status |= TS_RESTORE_SIGMASK;
+ set_bit(TIF_SIGPENDING, &ti->flags);
+}
+#endif /* !__ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */