| cpu.h (69728) | cpu.h (70861) |
|---|---|
| 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91 | 1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without --- 20 unchanged lines hidden (view full) --- 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)cpu.h 5.4 (Berkeley) 5/9/91 |
| 37 * $FreeBSD: head/sys/i386/include/cpu.h 69728 2000-12-07 22:30:11Z phk $ | 37 * $FreeBSD: head/sys/i386/include/cpu.h 70861 2001-01-10 04:43:51Z jake $ |
| 38 */ 39 40#ifndef _MACHINE_CPU_H_ 41#define _MACHINE_CPU_H_ 42 43/* 44 * Definitions unique to i386 cpu support. 45 */ --- 11 unchanged lines hidden (view full) --- 57#define cpu_exec(p) /* nothing */ 58#define cpu_swapin(p) /* nothing */ 59#define cpu_getstack(p) ((p)->p_md.md_regs->tf_esp) 60#define cpu_setstack(p, ap) ((p)->p_md.md_regs->tf_esp = (ap)) 61 62#define CLKF_USERMODE(framep) \ 63 ((ISPL((framep)->cf_cs) == SEL_UPL) || (framep->cf_eflags & PSL_VM)) 64 | 38 */ 39 40#ifndef _MACHINE_CPU_H_ 41#define _MACHINE_CPU_H_ 42 43/* 44 * Definitions unique to i386 cpu support. 45 */ --- 11 unchanged lines hidden (view full) --- 57#define cpu_exec(p) /* nothing */ 58#define cpu_swapin(p) /* nothing */ 59#define cpu_getstack(p) ((p)->p_md.md_regs->tf_esp) 60#define cpu_setstack(p, ap) ((p)->p_md.md_regs->tf_esp = (ap)) 61 62#define CLKF_USERMODE(framep) \ 63 ((ISPL((framep)->cf_cs) == SEL_UPL) || (framep->cf_eflags & PSL_VM)) 64 |
| 65#define CLKF_INTR(framep) (intr_nesting_level >= 2) | 65#define CLKF_INTR(framep) (PCPU_GET(intr_nesting_level) >= 2) |
| 66#define CLKF_PC(framep) ((framep)->cf_eip) 67 68/* 69 * astpending bits 70 */ 71#define AST_PENDING 0x00000001 72#define AST_RESCHED 0x00000002 73 74/* 75 * Preempt the current process if in interrupt from user mode, 76 * or after the current trap/syscall if in system mode. 77 * 78 * XXX: if astpending is later changed to an |= here due to more flags being 79 * added, we will have an atomicy problem. The type of atomicy we need is 80 * a non-locked orl. 81 */ 82#define need_resched() do { \ 83 PCPU_SET(astpending, AST_RESCHED|AST_PENDING); \ 84} while (0) | 66#define CLKF_PC(framep) ((framep)->cf_eip) 67 68/* 69 * astpending bits 70 */ 71#define AST_PENDING 0x00000001 72#define AST_RESCHED 0x00000002 73 74/* 75 * Preempt the current process if in interrupt from user mode, 76 * or after the current trap/syscall if in system mode. 77 * 78 * XXX: if astpending is later changed to an |= here due to more flags being 79 * added, we will have an atomicy problem. The type of atomicy we need is 80 * a non-locked orl. 81 */ 82#define need_resched() do { \ 83 PCPU_SET(astpending, AST_RESCHED|AST_PENDING); \ 84} while (0) |
| 85#define resched_wanted() (astpending & AST_RESCHED) | 85#define resched_wanted() (PCPU_GET(astpending) & AST_RESCHED) |
| 86 87/* 88 * Arrange to handle pending profiling ticks before returning to user mode. 89 * 90 * XXX this is now poorly named and implemented. It used to handle only a 91 * single tick and the P_OWEUPC flag served as a counter. Now there is a 92 * counter in the proc table and flag isn't really necessary. 93 */ --- 6 unchanged lines hidden (view full) --- 100 * 101 * XXX: aston() really needs to be an atomic (not locked, but an orl), 102 * in case need_resched() is set by an interrupt. But with astpending a 103 * per-cpu variable this is not trivial to do efficiently. For now we blow 104 * it off (asynchronous need_resched() conflicts are not critical). 105 */ 106#define signotify(p) aston() 107#define aston() do { \ | 86 87/* 88 * Arrange to handle pending profiling ticks before returning to user mode. 89 * 90 * XXX this is now poorly named and implemented. It used to handle only a 91 * single tick and the P_OWEUPC flag served as a counter. Now there is a 92 * counter in the proc table and flag isn't really necessary. 93 */ --- 6 unchanged lines hidden (view full) --- 100 * 101 * XXX: aston() really needs to be an atomic (not locked, but an orl), 102 * in case need_resched() is set by an interrupt. But with astpending a 103 * per-cpu variable this is not trivial to do efficiently. For now we blow 104 * it off (asynchronous need_resched() conflicts are not critical). 105 */ 106#define signotify(p) aston() 107#define aston() do { \ |
| 108 PCPU_SET(astpending, astpending | AST_PENDING); \ | 108 PCPU_SET(astpending, PCPU_GET(astpending) | AST_PENDING); \ |
| 109} while (0) 110#define astoff() 111 112/* 113 * CTL_MACHDEP definitions. 114 */ 115#define CPU_CONSDEV 1 /* dev_t: console terminal device */ 116#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */ --- 46 unchanged lines hidden --- | 109} while (0) 110#define astoff() 111 112/* 113 * CTL_MACHDEP definitions. 114 */ 115#define CPU_CONSDEV 1 /* dev_t: console terminal device */ 116#define CPU_ADJKERNTZ 2 /* int: timezone offset (seconds) */ --- 46 unchanged lines hidden --- |