17c478bd9Sstevel@tonic-gate/* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 67c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 77c478bd9Sstevel@tonic-gate * with the License. 87c478bd9Sstevel@tonic-gate * 97c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 107c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 117c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 127c478bd9Sstevel@tonic-gate * and limitations under the License. 137c478bd9Sstevel@tonic-gate * 147c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 157c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 167c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 177c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 187c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 197c478bd9Sstevel@tonic-gate * 207c478bd9Sstevel@tonic-gate * CDDL HEADER END 217c478bd9Sstevel@tonic-gate */ 227c478bd9Sstevel@tonic-gate/* 237c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 277c478bd9Sstevel@tonic-gate#pragma ident "%Z%%M% %I% %E% SMI" 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate#include <sys/asm_linkage.h> 307c478bd9Sstevel@tonic-gate#include <sys/machparam.h> /* To get SYSBASE and PAGESIZE */ 317c478bd9Sstevel@tonic-gate#include <sys/privregs.h> 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate#if !defined(lint) 347c478bd9Sstevel@tonic-gate 357c478bd9Sstevel@tonic-gate .seg ".text" 367c478bd9Sstevel@tonic-gate .align 4 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate#define PSR_PIL_BIT 0x8 397c478bd9Sstevel@tonic-gate 407c478bd9Sstevel@tonic-gate/* 417c478bd9Sstevel@tonic-gate * Macro to raise processor priority level. 427c478bd9Sstevel@tonic-gate * Avoid dropping processor priority if already at high level. 437c478bd9Sstevel@tonic-gate * Also avoid going below CPU->cpu_base_spl, which could've just been set by 447c478bd9Sstevel@tonic-gate * a higher-level interrupt thread that just blocked. 457c478bd9Sstevel@tonic-gate * XXX4U: bring splr inline 467c478bd9Sstevel@tonic-gate */ 477c478bd9Sstevel@tonic-gate#define RAISE(level) \ 487c478bd9Sstevel@tonic-gate b splr; \ 497c478bd9Sstevel@tonic-gate mov ((level) << PSR_PIL_BIT), %o0 507c478bd9Sstevel@tonic-gate/* 517c478bd9Sstevel@tonic-gate * Macro to set the priority to a specified level. 527c478bd9Sstevel@tonic-gate * Avoid dropping the priority below CPU->cpu_base_spl. 537c478bd9Sstevel@tonic-gate * XXX4U: bring splx inline 547c478bd9Sstevel@tonic-gate */ 557c478bd9Sstevel@tonic-gate#define SETPRI(level) \ 567c478bd9Sstevel@tonic-gate b splx; \ 577c478bd9Sstevel@tonic-gate mov ((level) << PSR_PIL_BIT), %o0 587c478bd9Sstevel@tonic-gate 597c478bd9Sstevel@tonic-gate#endif /* lint */ 607c478bd9Sstevel@tonic-gate 617c478bd9Sstevel@tonic-gate /* 627c478bd9Sstevel@tonic-gate * Berkley 4.3 introduced symbolically named interrupt levels 637c478bd9Sstevel@tonic-gate * as a way deal with priority in a machine independent fashion. 647c478bd9Sstevel@tonic-gate * Numbered priorities are machine specific, and should be 657c478bd9Sstevel@tonic-gate * discouraged where possible. 667c478bd9Sstevel@tonic-gate * 677c478bd9Sstevel@tonic-gate * Note, for the machine specific priorities there are 687c478bd9Sstevel@tonic-gate * examples listed for devices that use a particular priority. 697c478bd9Sstevel@tonic-gate * It should not be construed that all devices of that 707c478bd9Sstevel@tonic-gate * type should be at that priority. It is currently were 717c478bd9Sstevel@tonic-gate * the current devices fit into the priority scheme based 727c478bd9Sstevel@tonic-gate * upon time criticalness. 737c478bd9Sstevel@tonic-gate * 747c478bd9Sstevel@tonic-gate * The underlying assumption of these assignments is that 757c478bd9Sstevel@tonic-gate * SPARC9 IPL 10 is the highest level from which a device 767c478bd9Sstevel@tonic-gate * routine can call wakeup. Devices that interrupt from higher 777c478bd9Sstevel@tonic-gate * levels are restricted in what they can do. If they need 787c478bd9Sstevel@tonic-gate * kernels services they should schedule a routine at a lower 797c478bd9Sstevel@tonic-gate * level (via software interrupt) to do the required 807c478bd9Sstevel@tonic-gate * processing. 817c478bd9Sstevel@tonic-gate * 827c478bd9Sstevel@tonic-gate * Examples of this higher usage: 837c478bd9Sstevel@tonic-gate * Level Usage 847c478bd9Sstevel@tonic-gate * 15 Asynchronous memory exceptions 857c478bd9Sstevel@tonic-gate * 14 Profiling clock (and PROM uart polling clock) 867c478bd9Sstevel@tonic-gate * 13 Audio device 877c478bd9Sstevel@tonic-gate * 12 Serial ports 887c478bd9Sstevel@tonic-gate * 11 Floppy controller 897c478bd9Sstevel@tonic-gate * 907c478bd9Sstevel@tonic-gate * The serial ports request lower level processing on level 6. 917c478bd9Sstevel@tonic-gate * Audio and floppy request lower level processing on level 4. 927c478bd9Sstevel@tonic-gate * 937c478bd9Sstevel@tonic-gate * Also, almost all splN routines (where N is a number or a 947c478bd9Sstevel@tonic-gate * mnemonic) will do a RAISE(), on the assumption that they are 957c478bd9Sstevel@tonic-gate * never used to lower our priority. 967c478bd9Sstevel@tonic-gate * The exceptions are: 977c478bd9Sstevel@tonic-gate * spl8() Because you can't be above 15 to begin with! 987c478bd9Sstevel@tonic-gate * splzs() Because this is used at boot time to lower our 997c478bd9Sstevel@tonic-gate * priority, to allow the PROM to poll the uart. 1007c478bd9Sstevel@tonic-gate * spl0() Used to lower priority to 0. 1017c478bd9Sstevel@tonic-gate * splsoftclock() Used by hardclock to lower priority. 1027c478bd9Sstevel@tonic-gate */ 1037c478bd9Sstevel@tonic-gate 1047c478bd9Sstevel@tonic-gate#if defined(lint) 1057c478bd9Sstevel@tonic-gate 1067c478bd9Sstevel@tonic-gateint splimp(void) { return (0); } 1077c478bd9Sstevel@tonic-gateint splnet(void) { return (0); } 1087c478bd9Sstevel@tonic-gate 1097c478bd9Sstevel@tonic-gate#ifdef notdef 1107c478bd9Sstevel@tonic-gateint spl6(void) { return (0); } 1117c478bd9Sstevel@tonic-gateint spl5(void) { return (0); } 1127c478bd9Sstevel@tonic-gate#endif notdef 1137c478bd9Sstevel@tonic-gate 1147c478bd9Sstevel@tonic-gate#else /* lint */ 1157c478bd9Sstevel@tonic-gate 1167c478bd9Sstevel@tonic-gate /* locks out all interrupts, including memory errors */ 1177c478bd9Sstevel@tonic-gate ENTRY(spl8) 1187c478bd9Sstevel@tonic-gate SETPRI(15) 1197c478bd9Sstevel@tonic-gate SET_SIZE(spl8) 1207c478bd9Sstevel@tonic-gate 1217c478bd9Sstevel@tonic-gate /* just below the level that profiling runs */ 1227c478bd9Sstevel@tonic-gate ALTENTRY(splaudio) 1237c478bd9Sstevel@tonic-gate ENTRY(spl7) 1247c478bd9Sstevel@tonic-gate RAISE(13) 1257c478bd9Sstevel@tonic-gate SET_SIZE(spl7) 1267c478bd9Sstevel@tonic-gate SET_SIZE(splaudio) 1277c478bd9Sstevel@tonic-gate 1287c478bd9Sstevel@tonic-gate /* sun specific - highest priority onboard serial i/o zs ports */ 1297c478bd9Sstevel@tonic-gate ALTENTRY(splzs) 1307c478bd9Sstevel@tonic-gate SETPRI(12) /* Can't be a RAISE, as it's used to lower us */ 1317c478bd9Sstevel@tonic-gate SET_SIZE(splzs) 1327c478bd9Sstevel@tonic-gate 1337c478bd9Sstevel@tonic-gate /* 1347c478bd9Sstevel@tonic-gate * should lock out clocks and all interrupts, 1357c478bd9Sstevel@tonic-gate * as you can see, there are exceptions 1367c478bd9Sstevel@tonic-gate */ 1377c478bd9Sstevel@tonic-gate ALTENTRY(splhigh) 1387c478bd9Sstevel@tonic-gate ALTENTRY(splhi) 1397c478bd9Sstevel@tonic-gate 1407c478bd9Sstevel@tonic-gate /* the standard clock interrupt priority */ 1417c478bd9Sstevel@tonic-gate ALTENTRY(splclock) 1427c478bd9Sstevel@tonic-gate 1437c478bd9Sstevel@tonic-gate /* highest priority for any tty handling */ 1447c478bd9Sstevel@tonic-gate ALTENTRY(spltty) 1457c478bd9Sstevel@tonic-gate 1467c478bd9Sstevel@tonic-gate /* highest priority required for protection of buffered io system */ 1477c478bd9Sstevel@tonic-gate ALTENTRY(splbio) 1487c478bd9Sstevel@tonic-gate 1497c478bd9Sstevel@tonic-gate /* machine specific */ 1507c478bd9Sstevel@tonic-gate ENTRY2(spl6,spl5) 1517c478bd9Sstevel@tonic-gate RAISE(10) 1527c478bd9Sstevel@tonic-gate SET_SIZE(splhigh) 1537c478bd9Sstevel@tonic-gate SET_SIZE(splhi) 1547c478bd9Sstevel@tonic-gate SET_SIZE(splclock) 1557c478bd9Sstevel@tonic-gate SET_SIZE(spltty) 1567c478bd9Sstevel@tonic-gate SET_SIZE(splbio) 1577c478bd9Sstevel@tonic-gate SET_SIZE(spl5) 1587c478bd9Sstevel@tonic-gate SET_SIZE(spl6) 1597c478bd9Sstevel@tonic-gate 1607c478bd9Sstevel@tonic-gate /* 1617c478bd9Sstevel@tonic-gate * machine specific 1627c478bd9Sstevel@tonic-gate * for sun, some frame buffers must be at this priority 1637c478bd9Sstevel@tonic-gate */ 1647c478bd9Sstevel@tonic-gate ENTRY(spl4) 1657c478bd9Sstevel@tonic-gate RAISE(8) 1667c478bd9Sstevel@tonic-gate SET_SIZE(spl4) 1677c478bd9Sstevel@tonic-gate 1687c478bd9Sstevel@tonic-gate /* highest level that any network device will use */ 1697c478bd9Sstevel@tonic-gate ALTENTRY(splimp) 1707c478bd9Sstevel@tonic-gate 1717c478bd9Sstevel@tonic-gate /* 1727c478bd9Sstevel@tonic-gate * machine specific 1737c478bd9Sstevel@tonic-gate * for sun, devices with limited buffering: tapes, ethernet 1747c478bd9Sstevel@tonic-gate */ 1757c478bd9Sstevel@tonic-gate ENTRY(spl3) 1767c478bd9Sstevel@tonic-gate RAISE(6) 1777c478bd9Sstevel@tonic-gate SET_SIZE(splimp) 1787c478bd9Sstevel@tonic-gate SET_SIZE(spl3) 1797c478bd9Sstevel@tonic-gate 1807c478bd9Sstevel@tonic-gate /* 1817c478bd9Sstevel@tonic-gate * machine specific - not as time critical as above 1827c478bd9Sstevel@tonic-gate * for sun, disks 1837c478bd9Sstevel@tonic-gate */ 1847c478bd9Sstevel@tonic-gate ENTRY(spl2) 1857c478bd9Sstevel@tonic-gate RAISE(4) 1867c478bd9Sstevel@tonic-gate SET_SIZE(spl2) 1877c478bd9Sstevel@tonic-gate 1887c478bd9Sstevel@tonic-gate ENTRY(spl1) 1897c478bd9Sstevel@tonic-gate RAISE(2) 1907c478bd9Sstevel@tonic-gate SET_SIZE(spl1) 1917c478bd9Sstevel@tonic-gate 1927c478bd9Sstevel@tonic-gate /* highest level that any protocol handler will run */ 1937c478bd9Sstevel@tonic-gate ENTRY(splnet) 1947c478bd9Sstevel@tonic-gate RAISE(1) 1957c478bd9Sstevel@tonic-gate SET_SIZE(splnet) 1967c478bd9Sstevel@tonic-gate 1977c478bd9Sstevel@tonic-gate /* softcall priority */ 1987c478bd9Sstevel@tonic-gate /* used by hardclock to LOWER priority */ 1997c478bd9Sstevel@tonic-gate ENTRY(splsoftclock) 2007c478bd9Sstevel@tonic-gate SETPRI(1) 2017c478bd9Sstevel@tonic-gate SET_SIZE(splsoftclock) 2027c478bd9Sstevel@tonic-gate 2037c478bd9Sstevel@tonic-gate /* allow all interrupts */ 2047c478bd9Sstevel@tonic-gate ENTRY(spl0) 2057c478bd9Sstevel@tonic-gate SETPRI(0) 2067c478bd9Sstevel@tonic-gate SET_SIZE(spl0) 2077c478bd9Sstevel@tonic-gate 2087c478bd9Sstevel@tonic-gate#endif /* lint */ 2097c478bd9Sstevel@tonic-gate 2107c478bd9Sstevel@tonic-gate/* 2117c478bd9Sstevel@tonic-gate * splx - set PIL back to that indicated by the old %PSR passed as an argument, 2127c478bd9Sstevel@tonic-gate * or to the CPU's base priority, whichever is higher. 2137c478bd9Sstevel@tonic-gate * sys_rtt (in locore.s) relies on this not to use %g1 or %g2. 2147c478bd9Sstevel@tonic-gate */ 2157c478bd9Sstevel@tonic-gate 2167c478bd9Sstevel@tonic-gate#if defined(lint) 2177c478bd9Sstevel@tonic-gate 2187c478bd9Sstevel@tonic-gate/* ARGSUSED */ 2197c478bd9Sstevel@tonic-gatevoid 2207c478bd9Sstevel@tonic-gatesplx(int level) 2217c478bd9Sstevel@tonic-gate{ 2227c478bd9Sstevel@tonic-gate} 2237c478bd9Sstevel@tonic-gate 2247c478bd9Sstevel@tonic-gate#else /* lint */ 2257c478bd9Sstevel@tonic-gate 2267c478bd9Sstevel@tonic-gate ENTRY(splx) 2277c478bd9Sstevel@tonic-gate rdpr %pil, %o1 ! get current pil 2287c478bd9Sstevel@tonic-gate wrpr %o0, %pil 2297c478bd9Sstevel@tonic-gate retl 2307c478bd9Sstevel@tonic-gate mov %o1, %o0 2317c478bd9Sstevel@tonic-gate SET_SIZE(splx) 2327c478bd9Sstevel@tonic-gate 2337c478bd9Sstevel@tonic-gate#endif /* level */ 2347c478bd9Sstevel@tonic-gate 2357c478bd9Sstevel@tonic-gate/* 2367c478bd9Sstevel@tonic-gate * splr() 2377c478bd9Sstevel@tonic-gate * 2387c478bd9Sstevel@tonic-gate * splr is like splx but will only raise the priority and never drop it 2397c478bd9Sstevel@tonic-gate * Be careful not to set priority lower than CPU->cpu_base_pri, 2407c478bd9Sstevel@tonic-gate * even though it seems we're raising the priority, it could be set higher 2417c478bd9Sstevel@tonic-gate * at any time by an interrupt routine, so we must block interrupts and 2427c478bd9Sstevel@tonic-gate * look at CPU->cpu_base_pri. 2437c478bd9Sstevel@tonic-gate * 2447c478bd9Sstevel@tonic-gate */ 2457c478bd9Sstevel@tonic-gate 2467c478bd9Sstevel@tonic-gate#if defined(lint) 2477c478bd9Sstevel@tonic-gate#ifdef notdef 2487c478bd9Sstevel@tonic-gate 2497c478bd9Sstevel@tonic-gate/* ARGSUSED */ 2507c478bd9Sstevel@tonic-gateint 2517c478bd9Sstevel@tonic-gatesplr(int level) 2527c478bd9Sstevel@tonic-gate{ return (0); } 2537c478bd9Sstevel@tonic-gate 2547c478bd9Sstevel@tonic-gate#endif notdef 2557c478bd9Sstevel@tonic-gate#else /* lint */ 2567c478bd9Sstevel@tonic-gate 2577c478bd9Sstevel@tonic-gate/* 2587c478bd9Sstevel@tonic-gate * splr(psr_pri_field) 2597c478bd9Sstevel@tonic-gate * splr is like splx but will only raise the priority and never drop it 2607c478bd9Sstevel@tonic-gate */ 2617c478bd9Sstevel@tonic-gate 2627c478bd9Sstevel@tonic-gate ENTRY(splr) 2637c478bd9Sstevel@tonic-gate rdpr %pil, %o1 ! get current pil 2647c478bd9Sstevel@tonic-gate cmp %o0, %o1 2657c478bd9Sstevel@tonic-gate ble 1f 2667c478bd9Sstevel@tonic-gate nop 2677c478bd9Sstevel@tonic-gate wrpr %o0, %pil 2687c478bd9Sstevel@tonic-gate1: retl 2697c478bd9Sstevel@tonic-gate mov %o1, %o0 ! return the old pil 2707c478bd9Sstevel@tonic-gate SET_SIZE(splr) 2717c478bd9Sstevel@tonic-gate 2727c478bd9Sstevel@tonic-gate#endif /* lint */ 2737c478bd9Sstevel@tonic-gate 2747c478bd9Sstevel@tonic-gate/* 2757c478bd9Sstevel@tonic-gate * get_ticks() 2767c478bd9Sstevel@tonic-gate */ 2777c478bd9Sstevel@tonic-gate#if defined(lint) 2787c478bd9Sstevel@tonic-gate 2797c478bd9Sstevel@tonic-gate/* ARGSUSED */ 2807c478bd9Sstevel@tonic-gateuint64_t 2817c478bd9Sstevel@tonic-gateget_ticks(void) 2827c478bd9Sstevel@tonic-gate{ return (0); } 2837c478bd9Sstevel@tonic-gate 2847c478bd9Sstevel@tonic-gate#else /* lint */ 2857c478bd9Sstevel@tonic-gate 2867c478bd9Sstevel@tonic-gate ENTRY(get_ticks) 2877c478bd9Sstevel@tonic-gate rdpr %tick, %o0 2887c478bd9Sstevel@tonic-gate sllx %o0, 1, %o0 2897c478bd9Sstevel@tonic-gate retl 2907c478bd9Sstevel@tonic-gate srlx %o0, 1, %o0 ! shake off npt bit 2917c478bd9Sstevel@tonic-gate SET_SIZE(get_ticks) 2927c478bd9Sstevel@tonic-gate 2937c478bd9Sstevel@tonic-gate#endif /* lint */ 294