/* $NetBSD: cpu.h,v 1.30 2026/03/24 15:56:59 thorpej Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1990, 1993 * 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. 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 8.4 (Berkeley) 1/5/94 */ #ifndef _M68K_CPU_H_ #define _M68K_CPU_H_ #if defined(_KERNEL_OPT) #include "opt_m68k_arch.h" /* XXX Should not do this here. */ #endif /* * Exported definitions common to Motorola m68k-based ports. */ /* * XXX The remaining contents of this file should be split out * XXX into separate files (like m68k.h) and then this file * XXX should go away. Furthermore, most of the stuff defined * XXX here does NOT belong in <machine/cpu.h>, and the ports * XXX using this file should remove <m68k/cpu.h> from there. */ #include <m68k/m68k.h> /* XXX - Move this stuff into <m68k/cacr.h> maybe? */ /* 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 */ /* fields in the 68040 cache control register */ #define IC40_ENABLE 0x00008000 /* instruction cache enable bit */ #define DC40_ENABLE 0x80000000 /* data cache enable bit */ /* additional fields in the 68060 cache control register */ #define DC60_NAD 0x40000000 /* no allocate mode, data cache */ #define DC60_ESB 0x20000000 /* enable store buffer */ #define DC60_DPI 0x10000000 /* disable CPUSH invalidation */ #define DC60_FOC 0x08000000 /* four kB data cache mode (else 8) */ #define IC60_EBC 0x00800000 /* enable branch cache */ #define IC60_CABC 0x00400000 /* clear all branch cache entries */ #define IC60_CUBC 0x00200000 /* clear user branch cache entries */ #define IC60_NAI 0x00004000 /* no allocate mode, instr. cache */ #define IC60_FIC 0x00002000 /* four kB instr. cache (else 8) */ #define CACHE2030_ON (DC_WA|DC_CLR|DC_ENABLE|IC_CLR|IC_ENABLE) #define CACHE2030_BE (DC_BE|IC_BE) #define _IC_CLEAR(x) ((x) & ~DC_CLR) #define _DC_CLEAR(x) ((x) & ~IC_CLR) #ifdef _KERNEL #ifdef __HAVE_M68K_DYNAMIC_CACR extern int cacr_cache_on; extern int cacr_cache_clr; extern int cacr_ic_clr; extern int cacr_dc_clr; #define CACHE_ON cacr_cache_on #define CACHE_CLR cacr_cache_clr #define IC_CLEAR cacr_ic_clr #define DC_CLEAR cacr_dc_clr #else #define CACHE_ON (CACHE2030_ON | CACHE2030_BE) #define CACHE_CLR (CACHE_ON) #define IC_CLEAR _IC_CLEAR(CACHE_CLR) #define DC_CLEAR _DC_CLEAR(CACHE_CLR) #endif /* __HAVE_M68K_DYNAMIC_CACR */ #endif /* _KERNEL */ #define CACHE_OFF (DC_CLR|IC_CLR) #define CACHE40_ON (IC40_ENABLE|DC40_ENABLE) #define CACHE40_OFF (0x00000000) #define CACHE60_ON (CACHE40_ON |IC60_CABC|IC60_EBC|DC60_ESB) #define CACHE60_OFF (CACHE40_OFF|IC60_CABC) #define CACHELINE_SIZE 16 #define CACHELINE_MASK (CACHELINE_SIZE - 1) /* CTL_MACHDEP definitions. (Common to all m68k ports.) */ #define CPU_CONSDEV 1 /* dev_t: console terminal device */ #define CPU_ROOT_DEVICE 2 /* string: root device name */ #define CPU_BOOTED_KERNEL 3 /* string: booted kernel name */ #define CPU_BROKEN_RMC 4 /* bool: has non-working /RMC */ #if defined(_KERNEL) || defined(_KMEMUSER) #include <sys/cpu_data.h> struct cpu_info { struct cpu_data ci_data; /* MI per-cpu data */ cpuid_t ci_cpuid; int ci_mtx_count; int ci_mtx_oldspl; volatile int ci_want_resched; volatile int ci_idepth; struct lwp *ci_onproc; /* current user LWP / kthread */ }; #endif /* _KERNEL || _KMEMUSER */ #ifdef _KERNEL extern struct cpu_info cpu_info_store; struct proc; void cpu_proc_fork(struct proc *, struct proc *); #define curcpu() (&cpu_info_store) /* * definitions of cpu-dependent requirements * referenced in generic code */ #define cpu_number() 0 #define LWP_PC(l) (((struct trapframe *)((l)->l_md.md_regs))->tf_pc) /* * Arguments to hardclock and gatherstats encapsulate the previous * machine state in an opaque clockframe. On the m68k platforms, we use * what the interrupt stub puts on the stack before calling C code. */ struct clockframe { /* regs saved on the stack by the interrupt stub */ u_int cf_regs[4]; /* d0,d1,a0,a1 */ /* hardware frame */ u_short cf_sr; /* sr at time of interrupt */ u_long cf_pc; /* pc at time of interrupt */ u_short cf_vo; /* vector offset (4-word HW frame) */ } __attribute__((__packed__)); #define CLKF_USERMODE(framep) (((framep)->cf_sr & PSL_S) == 0) #define CLKF_PC(framep) ((framep)->cf_pc) #if 0 /* * We can determine if we were previously in an interrupt context * if we were running on the interrupt stack (as opposed to the * "master" stack). * * XXX Actually, we can't, because we don't use the master stack * XXX right now. * * (Actually, it's unlikely that we'll ever use the master stack in NetBSD. * It would complicate the spl*() functions considerably and it just doesn't * seem like a good trade-off for what seems like extremely marginal gains. * So, just blissfully run the kernel on the interrupt stack all the time, * and it's been that way for >30 years and no one has really complained * about it.) */ #define CLKF_INTR(framep) (((framep)->cf_sr & PSL_M) == 0) #else /* * The clock interrupt handler can determine if it's a nested * interrupt by checking for intr_depth > 1. * (Remember, the clock interrupt handler itself will cause the * depth counter to be incremented). */ extern volatile unsigned int intr_depth; #define CLKF_INTR(framep) (intr_depth > 1) #endif #ifndef __HAVE_M68K_HW_AST #define cpu_set_hw_ast(l) __nothing #endif extern volatile int astpending; #define cpu_set_ast(l) \ do { \ __USE(l); astpending = 1; cpu_set_hw_ast(l); \ } while (/*CONSTCOND*/0) /* * Preempt the current process if in interrupt from user mode, * or after the current trap/syscall if in system mode. */ #define cpu_need_resched(ci, l, flags) \ do { \ __USE(ci); __USE(flags); cpu_set_ast(l); \ } while (/*CONSTCOND*/0) /* * Give a profiling tick to the current process when the user profiling * buffer pages are invalid. On m68k, request an ast to send us through * trap, marking the proc as needing a profiling tick. */ #define cpu_need_proftick(l) \ do { \ (l)->l_pflag |= LP_OWEUPC; cpu_set_ast(l); \ } while (/*CONSTCOND*/0) /* * Notify the current process (p) that it has a signal pending, * process as soon as possible. */ #define cpu_signotify(l) cpu_set_ast(l) #endif /* _KERNEL */ #endif /* _M68K_CPU_H_ */
