NetBSD-5.0.2/sys/arch/arm/ofw/ofwgencfg_machdep.c
/* $NetBSD: ofwgencfg_machdep.c,v 1.13 2008/08/29 19:08:29 matt Exp $ */
/*
* Copyright 1997
* Digital Equipment Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and conditions.
* Subject to these conditions, you may download, copy, install,
* use, modify and distribute this software in source and/or binary
* form. No title or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions as
* they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or logo of
* Digital Equipment Corporation. Neither the "Digital Equipment
* Corporation" name nor any trademark or logo of Digital Equipment
* Corporation may be used to endorse or promote products derived
* from this software without the prior written permission of
* Digital Equipment Corporation.
*
* 3) This software is provided "AS-IS" and any express or implied
* warranties, including but not limited to, any implied warranties
* of merchantability, fitness for a particular purpose, or
* non-infringement are disclaimed. In no event shall DIGITAL be
* liable for any damages whatsoever, and in particular, DIGITAL
* shall not be liable for special, indirect, consequential, or
* incidental damages or damages for lost profits, loss of
* revenue or loss of use, whether such damages arise in contract,
* negligence, tort, under statute, in equity, at law or otherwise,
* even if advised of the possibility of such damage.
*/
/*
* Kernel setup for the OFW Generic Configuration
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ofwgencfg_machdep.c,v 1.13 2008/08/29 19:08:29 matt Exp $");
#include "opt_ddb.h"
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/reboot.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/exec.h>
#include <sys/ksyms.h>
#include <uvm/uvm_extern.h>
#include <dev/cons.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#include <machine/frame.h>
#include <machine/bootconfig.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/irqhandler.h>
#include <arm/arm32/machdep.h>
#include <arm/undefined.h>
#include <dev/ofw/openfirm.h>
#include <machine/ofw.h>
#include "ksyms.h"
/*
* Imported variables
*/
extern pv_addr_t undstack;
extern pv_addr_t abtstack;
extern pv_addr_t kernelstack;
extern u_int data_abort_handler_address;
extern u_int prefetch_abort_handler_address;
extern u_int undefined_handler_address;
/*
* Imported routines
*/
extern void data_abort_handler __P((trapframe_t *frame));
extern void prefetch_abort_handler __P((trapframe_t *frame));
extern void undefinedinstruction_bounce __P((trapframe_t *frame));
int ofbus_match __P((struct device *, struct cfdata *, void *));
void ofbus_attach __P((struct device *, struct device *, void *));
/* Local routines */
static void process_kernel_args __P((void));
/*
* Exported variables
*/
BootConfig bootconfig;
char *boot_args = NULL;
char *boot_file = NULL;
#ifndef PMAP_STATIC_L1S
int max_processes = 64; /* Default number */
#endif /* !PMAP_STATIC_L1S */
int ofw_handleticks = 0; /* set to TRUE by cpu_initclocks */
CFATTACH_DECL(ofbus_root, sizeof(struct device),
ofbus_match, ofbus_attach, NULL, NULL);
/**************************************************************/
/*
* void boot(int howto, char *bootstr)
*
* Reboots the system, in event of:
* - reboot system call
* - panic
*/
void
cpu_reboot(howto, bootstr)
int howto;
char *bootstr;
{
/* Just call OFW common routine. */
ofw_boot(howto, bootstr);
OF_boot("not reached -- stupid compiler");
}
/*
* u_int initarm(ofw_handle_t handle)
*
* Initial entry point on startup for a GENERIC OFW
* system. Called with MMU on, running in the OFW
* client environment.
*
* Major tasks are:
* - read the bootargs out of OFW;
* - take over memory management from OFW;
* - set-up the stacks
* - set-up the exception handlers
*
* Return the new stackptr (va) for the SVC frame.
*
*/
u_int
initarm(void *cookie)
{
ofw_handle_t ofw_handle = cookie;
set_cpufuncs();
/* XXX - set this somewhere else? -JJK */
boothowto = 0;
/* Init the OFW interface. */
/* MUST do this before invoking any OFW client services! */
ofw_init(ofw_handle);
/* Initialize the console (which will call into OFW). */
/* This will allow us to see panic messages and other printf output. */
consinit();
/* Get boot info and process it. */
ofw_getbootinfo(&boot_file, &boot_args);
process_kernel_args();
/* Configure memory. */
ofw_configmem();
/*
* Set-up stacks.
* OFW has control of the interrupt frame.
* The kernel stack for SVC mode will be updated on return from
* this routine. All we need to do is prepare for abort-handling
* and undefined exceptions.
*/
set_stackptr(PSR_UND32_MODE, undstack.pv_va + PAGE_SIZE);
set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + PAGE_SIZE);
/* Set-up exception handlers.
* Take control of selected vectors from OFW.
* We take: undefined, swi, pre-fetch abort, data abort, addrexc
* OFW retains: reset, irq, fiq
*/
arm32_vector_init(ARM_VECTORS_LOW,
ARM_VEC_ALL & ~(ARM_VEC_RESET|ARM_VEC_IRQ|ARM_VEC_FIQ));
data_abort_handler_address = (u_int)data_abort_handler;
prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
undefined_handler_address =
(u_int)undefinedinstruction_bounce; /* why is this needed? -JJK */
/* Initialise the undefined instruction handlers. */
undefined_init();
/* Set-up the IRQ system. */
irq_init();
#if NKSYMS || defined(DDB) || defined(LKM)
ksyms_init(0, NULL, NULL); /* XXX */
#endif
#ifdef DDB
db_machine_init();
if (boothowto & RB_KDB)
Debugger();
#endif
/* Return the new stackbase. */
return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
}
/*
* Set various globals based on contents of boot_args
*
* Note that this routine must NOT trash boot_args, as
* it is scanned by later routines.
*
* There ought to be a routine in machdep.c that does
* the generic bits of this. -JJK
*/
static void
process_kernel_args(void)
{
/* Process all the generic ARM boot options */
parse_mi_bootargs(boot_args);
/* Check for ofwgencfg-specific args here. */
}
/*
* Walk the OFW device tree and configure found devices.
*
* Move this into common OFW module? -JJK
*/
void
ofrootfound(void)
{
int node;
struct ofbus_attach_args aa;
if (!(node = OF_peer(0)))
panic("No OFW root");
aa.oba_busname = "ofw";
aa.oba_phandle = node;
if (!config_rootfound("ofbus", &aa))
panic("ofw root ofbus not configured");
}