279 lines
7.1 KiB
C
279 lines
7.1 KiB
C
/* $NetBSD: ofwgencfg_machdep.c,v 1.1 2002/02/06 21:30:26 thorpej 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 "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 <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 <arm/undefined.h>
|
|
|
|
#include "opt_ipkdb.h"
|
|
|
|
#include <dev/ofw/openfirm.h>
|
|
#include <machine/ofw.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 parse_mi_bootargs __P((char *args));
|
|
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 */
|
|
|
|
struct cfattach ofbus_root_ca = {
|
|
sizeof(struct device), ofbus_match, ofbus_attach
|
|
};
|
|
|
|
/**************************************************************/
|
|
|
|
|
|
/*
|
|
* 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");
|
|
}
|
|
|
|
|
|
/*
|
|
* vaddr_t 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.
|
|
*
|
|
*/
|
|
vaddr_t
|
|
initarm(ofw_handle)
|
|
ofw_handle_t ofw_handle;
|
|
{
|
|
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 + NBPG);
|
|
set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + NBPG);
|
|
|
|
/* 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
|
|
*/
|
|
{
|
|
int our_vecnums[] = {1, 2, 3, 4, 5};
|
|
unsigned int *vectors = (unsigned int *)0;
|
|
extern unsigned int page0[];
|
|
int i;
|
|
|
|
for (i = 0; i < (sizeof(our_vecnums) / sizeof(int)); i++) {
|
|
int vecnum = our_vecnums[i];
|
|
|
|
/* Copy both the instruction and the data word
|
|
* for the vector.
|
|
* The latter is needed to support branching
|
|
* arbitrarily far.
|
|
*/
|
|
vectors[vecnum] = page0[vecnum];
|
|
vectors[vecnum + 8] = page0[vecnum + 8];
|
|
}
|
|
|
|
/* Sync the first 16 words of memory */
|
|
cpu_icache_sync_range(0, 64);
|
|
}
|
|
|
|
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();
|
|
|
|
#ifdef DDB
|
|
db_machine_init();
|
|
#ifdef __ELF__
|
|
ddb_init(0, NULL, NULL); /* XXX */
|
|
#else
|
|
{
|
|
struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE;
|
|
extern int end;
|
|
extern char *esym;
|
|
|
|
ddb_init(kernexec->a_syms, &end, esym);
|
|
}
|
|
#endif /* __ELF__ */
|
|
|
|
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");
|
|
}
|