/* * 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. * * %sccs.include.redist.c% * * from: Utah $Hdr: cpu.h 1.16 91/03/25$ * * @(#)cpu.h 7.13 (Berkeley) 12/27/92 */ /* * 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 */ #define cpu_exec(p) /* nothing */ #define cpu_wait(p) /* nothing */ #define cpu_setstack(p, ap) \ (p)->p_md.md_regs[SP] = ap /* * Arguments to hardclock and gatherstats encapsulate the previous * machine state in an opaque clockframe. One the hp300, we use * what the hardware pushes on an interrupt (frame format 0). */ struct clockframe { u_short sr; /* sr at time of interrupt */ u_long pc; /* pc at time of interrupt */ u_short vo; /* vector offset (4-word frame) */ }; #define CLKF_USERMODE(framep) (((framep)->sr & PSL_S) == 0) #define CLKF_BASEPRI(framep) (((framep)->sr & PSL_IPL) == 0) #define CLKF_PC(framep) ((framep)->pc) #if 0 /* We would like to do it this way... */ #define CLKF_INTR(framep) (((framep)->sr & PSL_M) == 0) #else /* but until we start using PSL_M, we have to do this instead */ #define CLKF_INTR(framep) (0) /* XXX */ #endif /* * 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 when the user profiling * buffer pages are invalid. On the hp300, request an ast to send us * through trap, marking the proc as needing a profiling tick. */ #define need_proftick(p) { (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 */ #define HP_380 7 /* 25Mhz 68040 */ #define HP_433 8 /* 33Mhz 68040 */ /* values for mmutype (assigned for quick testing) */ #define MMU_68040 -2 /* 68040 on-chip MMU */ #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) /* * 68040 MMU */ #define MMU4_RES 0x001 #define MMU4_TTR 0x002 #define MMU4_WP 0x004 #define MMU4_MOD 0x010 #define MMU4_CMMASK 0x060 #define MMU4_SUP 0x080 #define MMU4_U0 0x100 #define MMU4_U1 0x200 #define MMU4_GLB 0x400 #define MMU4_BE 0x800 /* 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) /* 68040 cache control register */ #define IC4_ENABLE 0x8000 /* instruction cache enable bit */ #define DC4_ENABLE 0x80000000 /* data cache enable bit */ #define CACHE4_ON (IC4_ENABLE|DC4_ENABLE) #define CACHE4_OFF (0)