281 lines
7.2 KiB
C
281 lines
7.2 KiB
C
/* $NetBSD: ofwgencfg_machdep.c,v 1.13 2000/06/29 08:53:02 mrg Exp $ */
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/*
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* Copyright 1997
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* Digital Equipment Corporation. All rights reserved.
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*
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* This software is furnished under license and may be used and
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* copied only in accordance with the following terms and conditions.
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* Subject to these conditions, you may download, copy, install,
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* use, modify and distribute this software in source and/or binary
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* form. No title or ownership is transferred hereby.
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*
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* 1) Any source code used, modified or distributed must reproduce
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* and retain this copyright notice and list of conditions as
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* they appear in the source file.
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*
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* 2) No right is granted to use any trade name, trademark, or logo of
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* Digital Equipment Corporation. Neither the "Digital Equipment
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* Corporation" name nor any trademark or logo of Digital Equipment
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* Corporation may be used to endorse or promote products derived
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* from this software without the prior written permission of
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* Digital Equipment Corporation.
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*
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* 3) This software is provided "AS-IS" and any express or implied
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* warranties, including but not limited to, any implied warranties
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* of merchantability, fitness for a particular purpose, or
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* non-infringement are disclaimed. In no event shall DIGITAL be
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* liable for any damages whatsoever, and in particular, DIGITAL
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* shall not be liable for special, indirect, consequential, or
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* incidental damages or damages for lost profits, loss of
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* revenue or loss of use, whether such damages arise in contract,
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* negligence, tort, under statute, in equity, at law or otherwise,
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* even if advised of the possibility of such damage.
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*/
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/*
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* Kernel setup for the OFW Generic Configuration
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*/
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#include "opt_ddb.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/exec.h>
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#include <uvm/uvm_extern.h>
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#include <dev/cons.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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#include <machine/frame.h>
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#include <machine/bootconfig.h>
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#include <machine/cpu.h>
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#include <machine/irqhandler.h>
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#include <machine/pte.h>
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#include <machine/undefined.h>
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#include "opt_ipkdb.h"
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#include <dev/ofw/openfirm.h>
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#include <machine/ofw.h>
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/*
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* Imported variables
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*/
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extern pv_addr_t undstack;
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extern pv_addr_t abtstack;
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extern pv_addr_t kernelstack;
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extern u_int data_abort_handler_address;
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extern u_int prefetch_abort_handler_address;
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extern u_int undefined_handler_address;
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/*
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* Imported routines
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*/
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extern void parse_mi_bootargs __P((char *args));
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extern void data_abort_handler __P((trapframe_t *frame));
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extern void prefetch_abort_handler __P((trapframe_t *frame));
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extern void undefinedinstruction_bounce __P((trapframe_t *frame));
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#ifdef DDB
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extern void db_machine_init __P((void));
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#endif
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int ofbus_match __P((struct device *, struct cfdata *, void *));
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void ofbus_attach __P((struct device *, struct device *, void *));
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/* Local routines */
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static void process_kernel_args __P((void));
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/*
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* Exported variables
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*/
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BootConfig bootconfig;
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char *boot_args = NULL;
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char *boot_file = NULL;
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#ifndef PMAP_STATIC_L1S
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int max_processes = 64; /* Default number */
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#endif /* !PMAP_STATIC_L1S */
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int ofw_handleticks = 0; /* set to TRUE by cpu_initclocks */
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struct cfattach ofbus_root_ca = {
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sizeof(struct device), ofbus_match, ofbus_attach
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};
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/**************************************************************/
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/*
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* void boot(int howto, char *bootstr)
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*
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* Reboots the system, in event of:
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* - reboot system call
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* - panic
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*/
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void
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cpu_reboot(howto, bootstr)
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int howto;
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char *bootstr;
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{
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/* Just call OFW common routine. */
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ofw_boot(howto, bootstr);
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OF_boot("not reached -- stupid compiler");
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}
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/*
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* vm_offset_t initarm(ofw_handle_t handle)
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*
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* Initial entry point on startup for a GENERIC OFW
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* system. Called with MMU on, running in the OFW
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* client environment.
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*
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* Major tasks are:
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* - read the bootargs out of OFW;
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* - take over memory management from OFW;
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* - set-up the stacks
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* - set-up the exception handlers
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*
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* Return the new stackptr (va) for the SVC frame.
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*
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*/
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vm_offset_t
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initarm(ofw_handle)
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ofw_handle_t ofw_handle;
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{
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set_cpufuncs();
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/* XXX - set this somewhere else? -JJK */
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boothowto = 0;
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/* Init the OFW interface. */
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/* MUST do this before invoking any OFW client services! */
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ofw_init(ofw_handle);
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/* Initialize the console (which will call into OFW). */
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/* This will allow us to see panic messages and other printf output. */
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consinit();
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/* Get boot info and process it. */
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ofw_getbootinfo(&boot_file, &boot_args);
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process_kernel_args();
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/* Configure memory. */
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ofw_configmem();
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/*
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* Set-up stacks.
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* OFW has control of the interrupt frame.
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* The kernel stack for SVC mode will be updated on return from
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* this routine. All we need to do is prepare for abort-handling
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* and undefined exceptions.
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*/
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set_stackptr(PSR_UND32_MODE, undstack.pv_va + NBPG);
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set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + NBPG);
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/* Set-up exception handlers.
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* Take control of selected vectors from OFW.
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* We take: undefined, swi, pre-fetch abort, data abort, addrexc
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* OFW retains: reset, irq, fiq
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*/
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{
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int our_vecnums[] = {1, 2, 3, 4, 5};
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unsigned int *vectors = (unsigned int *)0;
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extern unsigned int page0[];
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int i;
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for (i = 0; i < (sizeof(our_vecnums) / sizeof(int)); i++) {
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int vecnum = our_vecnums[i];
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/* Copy both the instruction and the data word
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* for the vector.
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* The latter is needed to support branching
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* arbitrarily far.
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*/
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vectors[vecnum] = page0[vecnum];
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vectors[vecnum + 8] = page0[vecnum + 8];
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}
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/* Sync the first 16 words of memory */
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cpu_cache_syncI_rng(0, 64);
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}
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data_abort_handler_address = (u_int)data_abort_handler;
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prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
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undefined_handler_address =
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(u_int)undefinedinstruction_bounce; /* why is this needed? -JJK */
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/* Initialise the undefined instruction handlers. */
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undefined_init();
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/* Set-up the IRQ system. */
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irq_init();
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#ifdef DDB
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printf("ddb: ");
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db_machine_init();
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{
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struct exec *kernexec = (struct exec *)KERNEL_BASE;
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extern int end;
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extern char *esym;
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ddb_init(kernexec->a_syms, &end, esym);
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printf("ddb_init: a_syms = 0x%lx, end = %p, esym = %p\n",
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kernexec->a_syms, &end, esym);
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}
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if (boothowto & RB_KDB)
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Debugger();
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#endif
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/* Return the new stackbase. */
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return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
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}
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/*
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* Set various globals based on contents of boot_args
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*
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* Note that this routine must NOT trash boot_args, as
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* it is scanned by later routines.
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*
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* There ought to be a routine in machdep.c that does
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* the generic bits of this. -JJK
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*/
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static void
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process_kernel_args(void)
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{
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/* Process all the generic ARM boot options */
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parse_mi_bootargs(boot_args);
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/* Check for ofwgencfg-specific args here. */
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}
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/*
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* Walk the OFW device tree and configure found devices.
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*
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* Move this into common OFW module? -JJK
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*/
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void
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ofrootfound(void)
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{
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int node;
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struct ofbus_attach_args aa;
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if (!(node = OF_peer(0)))
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panic("No OFW root");
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aa.oba_busname = "ofw";
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aa.oba_phandle = node;
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if (!config_rootfound("ofroot", &aa))
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panic("ofw root ofbus not configured");
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}
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