/* $NetBSD: arm32_machdep.c,v 1.45 2005/04/25 15:02:03 lukem Exp $ */ /* * Copyright (c) 1994-1998 Mark Brinicombe. * Copyright (c) 1994 Brini. * All rights reserved. * * This code is derived from software written for Brini by Mark Brinicombe * * 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 Mark Brinicombe * for the NetBSD Project. * 4. The name of the company nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * Machine dependant functions for kernel setup * * Created : 17/09/94 * Updated : 18/04/01 updated for new wscons */ #include __KERNEL_RCSID(0, "$NetBSD: arm32_machdep.c,v 1.45 2005/04/25 15:02:03 lukem Exp $"); #include "opt_md.h" #include "opt_pmap_debug.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "opt_ipkdb.h" #include "md.h" struct vm_map *exec_map = NULL; struct vm_map *mb_map = NULL; struct vm_map *phys_map = NULL; extern int physmem; #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) extern size_t md_root_size; /* Memory disc size */ #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ pv_addr_t kernelstack; /* the following is used externally (sysctl_hw) */ char machine[] = MACHINE; /* from */ char machine_arch[] = MACHINE_ARCH; /* from */ /* Our exported CPU info; we can have only one. */ struct cpu_info cpu_info_store; caddr_t msgbufaddr; extern paddr_t msgbufphys; int kernel_debug = 0; struct user *proc0paddr; /* exported variable to be filled in by the bootloaders */ char *booted_kernel; /* Prototypes */ void data_abort_handler __P((trapframe_t *frame)); void prefetch_abort_handler __P((trapframe_t *frame)); extern void configure __P((void)); /* * arm32_vector_init: * * Initialize the vector page, and select whether or not to * relocate the vectors. * * NOTE: We expect the vector page to be mapped at its expected * destination. */ void arm32_vector_init(vaddr_t va, int which) { extern unsigned int page0[], page0_data[]; unsigned int *vectors = (int *) va; unsigned int *vectors_data = vectors + (page0_data - page0); int vec; /* * Loop through the vectors we're taking over, and copy the * vector's insn and data word. */ for (vec = 0; vec < ARM_NVEC; vec++) { if ((which & (1 << vec)) == 0) { /* Don't want to take over this vector. */ continue; } vectors[vec] = page0[vec]; vectors_data[vec] = page0_data[vec]; } /* Now sync the vectors. */ cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); vector_page = va; if (va == ARM_VECTORS_HIGH) { /* * Assume the MD caller knows what it's doing here, and * really does want the vector page relocated. * * Note: This has to be done here (and not just in * cpu_setup()) because the vector page needs to be * accessible *before* cpu_startup() is called. * Think ddb(9) ... * * NOTE: If the CPU control register is not readable, * this will totally fail! We'll just assume that * any system that has high vector support has a * readable CPU control register, for now. If we * ever encounter one that does not, we'll have to * rethink this. */ cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); } } /* * Debug function just to park the CPU */ void halt() { while (1) cpu_sleep(0); } /* Sync the discs and unmount the filesystems */ void bootsync(void) { static int bootsyncdone = 0; if (bootsyncdone) return; bootsyncdone = 1; /* Make sure we can still manage to do things */ if (GetCPSR() & I32_bit) { /* * If we get here then boot has been called without RB_NOSYNC * and interrupts were disabled. This means the boot() call * did not come from a user process e.g. shutdown, but must * have come from somewhere in the kernel. */ IRQenable; printf("Warning IRQ's disabled during boot()\n"); } vfs_shutdown(); } /* * void cpu_startup(void) * * Machine dependant startup code. * */ void cpu_startup() { vaddr_t minaddr; vaddr_t maxaddr; u_int loop; char pbuf[9]; /* Set the CPU control register */ cpu_setup(boot_args); /* Lock down zero page */ vector_page_setprot(VM_PROT_READ); /* * Give pmap a chance to set up a few more things now the vm * is initialised */ pmap_postinit(); /* * Initialize error message buffer (at end of core). */ /* msgbufphys was setup during the secondary boot strap */ for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); pmap_update(pmap_kernel()); initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); /* * Identify ourselves for the msgbuf (everything printed earlier will * not be buffered). */ printf("%s%s", copyright, version); format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); printf("total memory = %s\n", pbuf); minaddr = 0; /* * 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); /* * Finally, allocate mbuf cluster submap. */ mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, nmbclusters * mclbytes, VM_MAP_INTRSAFE, FALSE, NULL); format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); printf("avail memory = %s\n", pbuf); curpcb = &lwp0.l_addr->u_pcb; curpcb->pcb_flags = 0; curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)lwp0.l_addr + USPACE_UNDEF_STACK_TOP; curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + USPACE_SVC_STACK_TOP; pmap_set_pcb_pagedir(pmap_kernel(), curpcb); curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; } /* * machine dependent system variables. */ static int sysctl_machdep_booted_device(SYSCTLFN_ARGS) { struct sysctlnode node; if (booted_device == NULL) return (EOPNOTSUPP); node = *rnode; node.sysctl_data = booted_device->dv_xname; node.sysctl_size = strlen(booted_device->dv_xname) + 1; return (sysctl_lookup(SYSCTLFN_CALL(&node))); } static int sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) { struct sysctlnode node; if (booted_kernel == NULL || booted_kernel[0] == '\0') return (EOPNOTSUPP); node = *rnode; node.sysctl_data = booted_kernel; node.sysctl_size = strlen(booted_kernel) + 1; return (sysctl_lookup(SYSCTLFN_CALL(&node))); } static int sysctl_machdep_powersave(SYSCTLFN_ARGS) { struct sysctlnode node = *rnode; int error, newval; newval = cpu_do_powersave; node.sysctl_data = &newval; if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) node.sysctl_flags &= ~CTLFLAG_READWRITE; error = sysctl_lookup(SYSCTLFN_CALL(&node)); if (error || newp == NULL || newval == cpu_do_powersave) return (error); if (newval < 0 || newval > 1) return (EINVAL); cpu_do_powersave = newval; return (0); } SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") { sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "machdep", NULL, NULL, 0, NULL, 0, CTL_MACHDEP, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "debug", NULL, NULL, 0, &kernel_debug, 0, CTL_MACHDEP, CPU_DEBUG, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "booted_device", NULL, sysctl_machdep_booted_device, 0, NULL, 0, CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRING, "booted_kernel", NULL, sysctl_machdep_booted_kernel, 0, NULL, 0, CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_STRUCT, "console_device", NULL, sysctl_consdev, 0, NULL, sizeof(dev_t), CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT|CTLFLAG_READWRITE, CTLTYPE_INT, "powersave", NULL, sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); } void parse_mi_bootargs(args) char *args; { int integer; if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) if (integer) boothowto |= RB_SINGLE; if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) if (integer) boothowto |= RB_KDB; if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) if (integer) boothowto |= RB_ASKNAME; #ifdef PMAP_DEBUG if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { pmap_debug_level = integer; pmap_debug(pmap_debug_level); } #endif /* PMAP_DEBUG */ /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) bufpages = integer;*/ #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { md_root_size = integer; md_root_size *= 1024; if (md_root_size < 32*1024) md_root_size = 32*1024; if (md_root_size > 2048*1024) md_root_size = 2048*1024; } #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) if (integer) boothowto |= AB_QUIET; if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) if (integer) boothowto |= AB_VERBOSE; }