Net2/usr/src/sys/hp300/include/cpu.h
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Utah $Hdr: cpu.h 1.16 91/03/25$
*
* @(#)cpu.h 7.7 (Berkeley) 6/27/91
*/
/*
* Exported definitions unique to hp300/68k cpu support.
*/
/*
* definitions of cpu-dependent requirements
* referenced in generic code
*/
#define COPY_SIGCODE /* copy sigcode above user stack in exec */
/*
* function vs. inline configuration;
* these are defined to get generic functions
* rather than inline or machine-dependent implementations
*/
#define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */
#undef NEED_FFS /* don't need ffs function */
#undef NEED_BCMP /* don't need bcmp function */
#undef NEED_STRLEN /* don't need strlen function */
#define cpu_exec(p) /* nothing */
#define cpu_wait(p) /* nothing */
/*
* Arguments to hardclock, softclock and gatherstats
* encapsulate the previous machine state in an opaque
* clockframe; for hp300, use just what the hardware
* leaves on the stack.
*/
typedef struct intrframe {
int pc;
int ps;
} clockframe;
#define CLKF_USERMODE(framep) (((framep)->ps & PSL_S) == 0)
#define CLKF_BASEPRI(framep) (((framep)->ps & PSL_IPL7) == 0)
#define CLKF_PC(framep) ((framep)->pc)
/*
* Preempt the current process if in interrupt from user mode,
* or after the current trap/syscall if in system mode.
*/
#define need_resched() { want_resched++; aston(); }
/*
* Give a profiling tick to the current process from the softclock
* interrupt. On hp300, request an ast to send us through trap(),
* marking the proc as needing a profiling tick.
*/
#define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); }
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) aston()
#define aston() (astpending++)
int astpending; /* need to trap before returning to user mode */
int want_resched; /* resched() was called */
/*
* simulated software interrupt register
*/
extern unsigned char ssir;
#define SIR_NET 0x1
#define SIR_CLOCK 0x2
#define siroff(x) ssir &= ~(x)
#define setsoftnet() ssir |= SIR_NET
#define setsoftclock() ssir |= SIR_CLOCK
/*
* The rest of this should probably be moved to ../hp300/hp300cpu.h,
* although some of it could probably be put into generic 68k headers.
*/
/* values for machineid */
#define HP_320 0 /* 16Mhz 68020+HP MMU+16K external cache */
#define HP_330 1 /* 16Mhz 68020+68851 MMU */
#define HP_350 2 /* 25Mhz 68020+HP MMU+32K external cache */
#define HP_360 3 /* 25Mhz 68030 */
#define HP_370 4 /* 33Mhz 68030+64K external cache */
#define HP_340 5 /* 16Mhz 68030 */
#define HP_375 6 /* 50Mhz 68030+32K external cache */
/* values for mmutype (assigned for quick testing) */
#define MMU_68030 -1 /* 68030 on-chip subset of 68851 */
#define MMU_HP 0 /* HP proprietary */
#define MMU_68851 1 /* Motorola 68851 */
/* values for ectype */
#define EC_PHYS -1 /* external physical address cache */
#define EC_NONE 0 /* no external cache */
#define EC_VIRT 1 /* external virtual address cache */
/* values for cpuspeed (not really related to clock speed due to caches) */
#define MHZ_8 1
#define MHZ_16 2
#define MHZ_25 3
#define MHZ_33 4
#define MHZ_50 6
#ifdef KERNEL
extern int machineid, mmutype, ectype;
extern char *intiobase, *intiolimit;
/* what is this supposed to do? i.e. how is it different than startrtclock? */
#define enablertclock()
#endif
/* physical memory sections */
#define ROMBASE (0x00000000)
#define INTIOBASE (0x00400000)
#define INTIOTOP (0x00600000)
#define EXTIOBASE (0x00600000)
#define EXTIOTOP (0x20000000)
#define MAXADDR (0xFFFFF000)
/*
* Internal IO space:
*
* Ranges from 0x400000 to 0x600000 (IIOMAPSIZE).
*
* Internal IO space is mapped in the kernel from ``intiobase'' to
* ``intiolimit'' (defined in locore.s). Since it is always mapped,
* conversion between physical and kernel virtual addresses is easy.
*/
#define ISIIOVA(va) \
((char *)(va) >= intiobase && (char *)(va) < intiolimit)
#define IIOV(pa) ((int)(pa)-INTIOBASE+(int)intiobase)
#define IIOP(va) ((int)(va)-(int)intiobase+INTIOBASE)
#define IIOPOFF(pa) ((int)(pa)-INTIOBASE)
#define IIOMAPSIZE btoc(INTIOTOP-INTIOBASE) /* 2mb */
/*
* External IO space:
*
* DIO ranges from select codes 0-63 at physical addresses given by:
* 0x600000 + (sc - 32) * 0x10000
* DIO cards are addressed in the range 0-31 [0x600000-0x800000) for
* their control space and the remaining areas, [0x200000-0x400000) and
* [0x800000-0x1000000), are for additional space required by a card;
* e.g. a display framebuffer.
*
* DIO-II ranges from select codes 132-255 at physical addresses given by:
* 0x1000000 + (sc - 132) * 0x400000
* The address range of DIO-II space is thus [0x1000000-0x20000000).
*
* DIO/DIO-II space is too large to map in its entirety, instead devices
* are mapped into kernel virtual address space allocated from a range
* of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''.
*/
#define DIOBASE (0x600000)
#define DIOTOP (0x1000000)
#define DIOCSIZE (0x10000)
#define DIOIIBASE (0x01000000)
#define DIOIITOP (0x20000000)
#define DIOIICSIZE (0x00400000)
/*
* HP MMU
*/
#define MMUBASE IIOPOFF(0x5F4000)
#define MMUSSTP 0x0
#define MMUUSTP 0x4
#define MMUTBINVAL 0x8
#define MMUSTAT 0xC
#define MMUCMD MMUSTAT
#define MMU_UMEN 0x0001 /* enable user mapping */
#define MMU_SMEN 0x0002 /* enable supervisor mapping */
#define MMU_CEN 0x0004 /* enable data cache */
#define MMU_BERR 0x0008 /* bus error */
#define MMU_IEN 0x0020 /* enable instruction cache */
#define MMU_FPE 0x0040 /* enable 68881 FP coprocessor */
#define MMU_WPF 0x2000 /* write protect fault */
#define MMU_PF 0x4000 /* page fault */
#define MMU_PTF 0x8000 /* page table fault */
#define MMU_FAULT (MMU_PTF|MMU_PF|MMU_WPF|MMU_BERR)
#define MMU_ENAB (MMU_UMEN|MMU_SMEN|MMU_IEN|MMU_FPE)
/*
* 68851 and 68030 MMU
*/
#define PMMU_LVLMASK 0x0007
#define PMMU_INV 0x0400
#define PMMU_WP 0x0800
#define PMMU_ALV 0x1000
#define PMMU_SO 0x2000
#define PMMU_LV 0x4000
#define PMMU_BE 0x8000
#define PMMU_FAULT (PMMU_WP|PMMU_INV)
/* 680X0 function codes */
#define FC_USERD 1 /* user data space */
#define FC_USERP 2 /* user program space */
#define FC_PURGE 3 /* HPMMU: clear TLB entries */
#define FC_SUPERD 5 /* supervisor data space */
#define FC_SUPERP 6 /* supervisor program space */
#define FC_CPU 7 /* CPU space */
/* fields in the 68020 cache control register */
#define IC_ENABLE 0x0001 /* enable instruction cache */
#define IC_FREEZE 0x0002 /* freeze instruction cache */
#define IC_CE 0x0004 /* clear instruction cache entry */
#define IC_CLR 0x0008 /* clear entire instruction cache */
/* additional fields in the 68030 cache control register */
#define IC_BE 0x0010 /* instruction burst enable */
#define DC_ENABLE 0x0100 /* data cache enable */
#define DC_FREEZE 0x0200 /* data cache freeze */
#define DC_CE 0x0400 /* clear data cache entry */
#define DC_CLR 0x0800 /* clear entire data cache */
#define DC_BE 0x1000 /* data burst enable */
#define DC_WA 0x2000 /* write allocate */
#define CACHE_ON (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE)
#define CACHE_OFF (DC_CLR|IC_CLR)
#define CACHE_CLR (CACHE_ON)
#define IC_CLEAR (DC_WA|DC_BE|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE)
#define DC_CLEAR (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_ENABLE)