/* $NetBSD: machdep.c,v 1.9 2003/04/02 03:51:34 thorpej 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. 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. * * @(#)machdep.c 8.3 (Berkeley) 1/12/94 * from: Utah Hdr: machdep.c 1.63 91/04/24 */ #include "opt_ddb.h" #include "opt_execfmt.h" #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB #include #include #endif #include #include #include #include #include #include #include "com.h" #if NCOM > 0 #include #include 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; /* For sysctl_hw. */ extern char cpu_model[]; /* Our exported CPU info; we can have only one. */ struct cpu_info cpu_info_store; /* Maps for VM objects. */ struct vm_map *exec_map = NULL; struct vm_map *mb_map = NULL; struct vm_map *phys_map = NULL; int physmem; /* Total physical memory */ 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); /* * safepri is a safe priority for sleep to set for a spin-wait during * autoconfiguration or after a panic. Used as an argument to splx(). */ int safepri = MIPS1_PSL_LOWIPL; extern struct user *proc0paddr; /* * 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; bus_space_handle_t sh; caddr_t kernend, v; u_long first, last; vsize_t size; char *cp; int i, howto; uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); extern char edata[], end[]; *brkres = 0; /* Disable BREAK==reset on console */ /* Get the propaganda in early! */ led_display_str("NetBSD"); /* * Clear the BSS segment. */ kernend = (caddr_t)mips_round_page(end); memset(edata, 0, 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(); /* set the VM page size */ uvm_setpagesize(); physmem = btoc(memsize); 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); /* * Calibrate the timer, delay() relies on this. */ 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, (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 */ consinit(); mem_clusters[0].start = 0; mem_clusters[0].size = ctob(physmem); mem_cluster_cnt = 1; strcpy(cpu_model, "MIPS Malta Evaluation Board"); /* * XXX: check argv[0] - do something if "gdb"??? */ /* * Look at arguments passed to us and compute boothowto. */ boothowto = RB_AUTOBOOT; for (i = 1; i < argc; i++) { for (cp = argv[i]; *cp; cp++) { /* 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; } } /* * Load the rest of the available pages into the VM system. */ first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); last = mem_clusters[0].start + mem_clusters[0].size; uvm_page_physload(atop(first), atop(last), atop(first), atop(last), VM_FREELIST_DEFAULT); /* * Initialize error message buffer (at end of core). */ mips_init_msgbuf(); /* * Compute the size of system data structures. pmap_bootstrap() * needs some of this information. */ size = (vsize_t)allocsys(NULL, NULL); pmap_bootstrap(); /* * Allocate space for proc0's USPACE. */ v = (caddr_t)uvm_pageboot_alloc(USPACE); lwp0.l_addr = proc0paddr = (struct user *)v; lwp0.l_md.md_regs = (struct frame *)(v + USPACE) - 1; curpcb = &lwp0.l_addr->u_pcb; curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ /* * Allocate space for system data structures. These data structures * are allocated here instead of cpu_startup() because physical * memory is directly addressable. We don't have to map these into * the virtual address space. */ v = (caddr_t)uvm_pageboot_alloc(size); if ((allocsys(v, NULL) - v) != size) panic("mach_init: table size inconsistency"); /* * Initialize debuggers, and break into them, if appropriate. */ #ifdef DDB ddb_init(0, 0, 0); #endif if (boothowto & RB_KDB) #if defined(DDB) Debugger(); #endif } void consinit(void) { /* * Everything related to console initialization is done * in mach_init(). */ } /* * Allocate memory for variable-sized tables, */ void cpu_startup() { u_int i, base, residual; vaddr_t minaddr, maxaddr; vsize_t size; char pbuf[9]; /* * Good {morning,afternoon,evening,night}. */ printf(version); format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); printf("%s memory", pbuf); /* * Virtual memory is bootstrapped -- notify the bus spaces * that memory allocation is now safe. */ malta_configuration.mc_mallocsafe = 1; /* * Allocate virtual address space for file I/O buffers. * Note they are different than the array of headers, 'buf', * and usually occupy more virtual memory than physical. */ size = MAXBSIZE * nbuf; if (uvm_map(kernel_map, (vaddr_t *)&buffers, round_page(size), NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, UVM_ADV_NORMAL, 0)) != 0) panic("startup: cannot allocate VM for buffers"); minaddr = (vaddr_t)buffers; base = bufpages / nbuf; residual = bufpages % nbuf; for (i = 0; i < nbuf; i++) { vsize_t curbufsize; vaddr_t curbuf; struct vm_page *pg; /* * Each buffer has MAXBSIZE bytes of VM space allocated. Of * that MAXBSIZE space, we allocate and map (base+1) pages * for the first "residual" buffers, and then we allocate * "base" pages for the rest. */ curbuf = (vaddr_t) buffers + (i * MAXBSIZE); curbufsize = PAGE_SIZE * ((i < residual) ? (base + 1) : base); while (curbufsize) { pg = uvm_pagealloc(NULL, 0, NULL, 0); if (pg == NULL) panic("cpu_startup: not enough memory for " "buffer cache"); pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), VM_PROT_READ|VM_PROT_WRITE); curbuf += PAGE_SIZE; curbufsize -= PAGE_SIZE; } } pmap_update(pmap_kernel()); /* * Allocate a submap for exec arguments. This map effectively * limits the number of processes exec'ing at any time. */ exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); /* * Allocate a submap for physio. */ phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, VM_PHYS_SIZE, 0, FALSE, NULL); /* * (No need to allocate an mbuf cluster submap. Mbuf clusters * are allocated via the pool allocator, and we use KSEG to * map those pages.) */ format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); printf(", %s free", pbuf); format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); printf(", %s in %u buffers\n", pbuf, nbuf); /* * Set up buffers, so they can be used to read disk labels. */ bufinit(); } int waittime = -1; void cpu_reboot(howto, bootstr) int howto; char *bootstr; { /* Take a snapshot before clobbering any registers. */ if (curproc) savectx((struct user *)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(); /* * If we've been adjusting the clock, the todr * will be out of synch; adjust it now. */ resettodr(); } splhigh(); if (howto & RB_DUMP) dumpsys(); haltsys: doshutdownhooks(); if (howto & RB_HALT) { printf("\n"); printf("The operating system has halted.\n"); printf("Please press any key to reboot.\n\n"); cnpollc(1); /* For proper keyboard command handling */ cngetc(); cnpollc(0); } 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 */ }