| /* $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 | |
| #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 cpu; | |
| __u8 fpsaved[7]; | |
| 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 __pad; | |
| 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; | |
| __u64 cee_stuff; | |
| struct restart_block restart_block; | |
| 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_EXEC_DOMAIN 0x00000030 | |
| #define TI_PRE_COUNT 0x00000038 | |
| #define TI_NEW_CHILD 0x0000003c | |
| #define TI_SYS_NOERROR 0x0000003d | |
| #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_CEE_STUFF 0x00000498 | |
| #define TI_RESTART_BLOCK 0x000004a0 | |
| #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 */ | |
| #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 /* 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 */ | |
| /* 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_NEWSIGNALS (1<<TIF_NEWSIGNALS) | |
| #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_NOTIFY_RESUME | _TIF_SIGPENDING | \ | |
| _TIF_NEED_RESCHED | _TIF_PERFCTR)) | |
| #endif /* __KERNEL__ */ | |
| #endif /* _ASM_THREAD_INFO_H */ |