/* $NetBSD: machdep.c,v 1.51 2026/05/10 14:56:39 tls Exp $ */ /* * Copyright 2001, 2002 Wasabi Systems, Inc. * All rights reserved. * * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc. * * 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 for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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. */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1992, 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, The Mach Operating System project at * Carnegie-Mellon University and Ralph Campbell. * * 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. * * @(#)machdep.c 8.3 (Berkeley) 1/12/94 * from: Utah Hdr: machdep.c 1.63 91/04/24 */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.51 2026/05/10 14:56:39 tls Exp $"); #include "opt_ddb.h" #include "opt_execfmt.h" #include "opt_modular.h" #include <sys/param.h> #include <sys/boot_flag.h> #include <sys/buf.h> #include <sys/cpu.h> #include <sys/device.h> #include <sys/kcore.h> #include <sys/kernel.h> #include <sys/ksyms.h> #include <sys/mount.h> #include <sys/reboot.h> #include <sys/systm.h> #include <sys/termios.h> #include <uvm/uvm_extern.h> #include <dev/cons.h> #include "ksyms.h" #if NKSYMS || defined(DDB) || defined(MODULAR) #include <mips/db_machdep.h> #include <ddb/db_extern.h> #endif #include <machine/yamon.h> #include <mips/locore.h> #include <mips/psl.h> #include <evbmips/malta/autoconf.h> #include <evbmips/malta/maltareg.h> #include <evbmips/malta/maltavar.h> #include "com.h" #if NCOM > 0 #include <dev/ic/comreg.h> #include <dev/ic/comvar.h> int comcnrate = 38400; /* XXX should be config option */ #endif /* NCOM > 0 */ #define REGVAL(x) *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) struct malta_config malta_configuration; /* Maps for VM objects. */ struct vm_map *phys_map = NULL; int netboot; /* Are we netbooting? */ yamon_env_var *yamon_envp; phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; int mem_cluster_cnt; void configure(void); void mach_init(int, char **, yamon_env_var *, u_long); /* * Do all the stuff that locore normally does before calling main(). */ void mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) { struct malta_config *mcp = &malta_configuration; uint8_t * const brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); bus_space_handle_t sh; void *kernend; extern char edata[], end[]; CTASSERT((intptr_t)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES) < 0); *brkres = 0; /* Disable BREAK==reset on console */ /* Get the propaganda in early! */ led_display_str("NetBSD"); /* * Clear the BSS segment. */ kernend = (void *)mips_round_page(end); memset(edata, 0, (char *)kernend - edata); /* save the yamon environment pointer */ yamon_envp = envp; /* Use YAMON callbacks for early console I/O */ cn_tab = &yamon_promcd; /* * Set up the exception vectors and CPU-specific function * vectors early on. We need the wbflush() vector set up * before comcnattach() is called (or at least before the * first printf() after that is called). * Also clears the I+D caches. */ mips_vector_init(NULL, false); uvm_md_init(); physmem = btoc(memsize); /* * Start with YAMON's CPU frequency, which may or may not be reliable. */ (void)yamon_setcpufreq(1); gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); malta_bus_io_init(&mcp->mc_iot, mcp); malta_bus_mem_init(&mcp->mc_memt, mcp); malta_dma_init(mcp); /* * Always calibrate the timer - YAMON may be right on physical * hardware, but has been observed to be wrong on emulators. */ bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); malta_cal_timer(&mcp->mc_iot, sh); bus_space_unmap(&mcp->mc_iot, sh, 2); #if NCOM > 0 /* * Delay to allow firmware putchars to complete. * FIFO depth * character time. * character time = (1000000 / (defaultrate / 10)) */ delay(160000000 / comcnrate); if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, COM_FREQ, COM_TYPE_NORMAL, (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) panic("malta: unable to initialize serial console"); #else panic("malta: not configured to use serial console"); #endif /* NCOM > 0 */ mem_clusters[0].start = 0; mem_clusters[0].size = ctob(physmem); mem_cluster_cnt = 1; cpu_setmodel("MIPS Malta Evaluation Board"); /* * XXX: check argv[0] - do something if "gdb"??? */ /* * Look at arguments passed to us and compute boothowto. */ boothowto = RB_AUTOBOOT; #ifndef _LP64 for (int i = 1; i < argc; i++) { for (char *cp = argv[i]; *cp; cp++) { int howto; /* Ignore superfluous '-', if there is one */ if (*cp == '-') continue; howto = 0; BOOT_FLAG(*cp, howto); if (! howto) printf("bootflag '%c' not recognised\n", *cp); else boothowto |= howto; } } #endif /* * Load the rest of the available pages into the VM system. */ mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, mem_clusters, mem_cluster_cnt, NULL, 0); /* * Initialize error message buffer (at end of core). */ mips_init_msgbuf(); pmap_bootstrap(); /* * Allocate uarea page for lwp0 and set it. */ mips_init_lwp0_uarea(); /* * Initialize debuggers, and break into them, if appropriate. */ #if defined(DDB) if (boothowto & RB_KDB) Debugger(); #endif #if defined(MULTIPROCESSOR) && 0 /* * We can never be running on more than one processor but we can dream. */ mips_fixup_exceptions(mips_fixup_zero_relative, NULL); #endif } void consinit(void) { /* * Everything related to console initialization is done * in mach_init(). */ } /* * Allocate memory for variable-sized tables, */ void cpu_startup(void) { /* * Do the common startup items. */ cpu_startup_common(); /* * Virtual memory is bootstrapped -- notify the bus spaces * that memory allocation is now safe. */ malta_configuration.mc_mallocsafe = 1; } int waittime = -1; void cpu_reboot(int howto, char *bootstr) { /* Take a snapshot before clobbering any registers. */ savectx(curpcb); if (cold) { howto |= RB_HALT; goto haltsys; } /* If "always halt" was specified as a boot flag, obey. */ if (boothowto & RB_HALT) howto |= RB_HALT; boothowto = howto; if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { waittime = 0; vfs_shutdown(); } splhigh(); if (howto & RB_DUMP) dumpsys(); haltsys: doshutdownhooks(); pmf_system_shutdown(boothowto); if (howto & RB_HALT) { printf("\n"); printf("The operating system has halted.\n"); printf("Please press any key to reboot.\n\n"); cnpollc(true); /* For proper keyboard command handling */ cngetc(); cnpollc(false); } printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); yamon_exit(boothowto); printf("Oops, back from yamon_exit()\n\nResetting..."); REGVAL(MALTA_SOFTRES) = MALTA_GORESET; /* * Need a small delay here, otherwise we see the first few characters of * the warning below. */ delay(80000); printf("WARNING: reset failed!\nSpinning..."); for (;;) /* spin forever */ ; /* XXX */ }
