372 lines
9.7 KiB
C
372 lines
9.7 KiB
C
/* $NetBSD: shark_machdep.c,v 1.10 1998/08/27 04:00:55 mark 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 SHARK 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/buf.h>
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#include <sys/exec.h>
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#include <vm/vm.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 <vm/vm_kern.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/pio.h>
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#include <machine/pte.h>
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#include <machine/undefined.h>
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#include "ipkdb.h"
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#include <dev/ofw/openfirm.h>
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#include <machine/ofw.h>
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#include <arm32/isa/isa_machdep.h>
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#include <arm32/shark/sequoia.h>
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/*
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* Imported variables
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*/
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extern pv_addr_t irqstack;
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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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extern void consinit __P((void));
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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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/*
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* Exported variables
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*/
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BootConfig bootconfig;
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char *boot_path;
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char *boot_args;
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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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/*
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* For faster cache cleaning we need two 16K banks of virtual address
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* space that NOTHING else will access and then we alternate the cache
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* cleaning between the two banks.
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* The cache cleaning code requires requires 2 banks aligned
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* on total size boundry so the banks can be alternated by
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* xorring the size bit (assumes the bank size is a power of 2)
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*/
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extern unsigned int sa110_cache_clean_addr;
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extern unsigned int sa110_cache_clean_size;
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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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* Exported routines
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*/
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/* Move to header file? */
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extern void cpu_reboot __P((int, char *));
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extern vm_offset_t initarm __P((ofw_handle_t));
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extern void ofrootfound __P((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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/*
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* void cpu_reboot(int howto, char *bootstr)
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*
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* Reboots the system, in evsent 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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vm_offset_t pclean;
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vm_offset_t isa_io_physaddr, isa_mem_physaddr;
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vm_offset_t isa_io_virtaddr, isa_mem_virtaddr;
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vm_offset_t isadmaphysbufs;
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fiqhandler_t fiqhandler;
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extern void shark_fiq __P((void));
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extern void shark_fiq_end __P((void));
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/* Don't want to get hit with interrupts 'til we're ready. */
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(void)disable_interrupts(I32_bit | F32_bit);
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set_cpufuncs();
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/* XXX - set these 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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/* Configure ISA stuff: must be done before consinit */
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ofw_configisa(&isa_io_physaddr, &isa_mem_physaddr);
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/* Map-in ISA I/O and memory space. */
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/* XXX - this should be done in the isa-bus attach routine! -JJK */
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isa_mem_virtaddr = ofw_map(isa_mem_physaddr, NBPD, 0);
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isa_io_virtaddr = ofw_map(isa_io_physaddr, NBPD, 0);
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/* Set-up the ISA system: must be done before consinit */
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isa_init(isa_io_virtaddr, isa_mem_virtaddr);
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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_path, &boot_args);
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process_kernel_args();
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ofw_configisadma(&isadmaphysbufs);
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isa_dma_init();
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/* allocate a cache clean space */
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if ((pclean = ofw_getcleaninfo()) != -1) {
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sa110_cache_clean_addr = ofw_map(pclean, 0x4000 * 2,
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PT_B | PT_C);
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sa110_cache_clean_size = 0x4000;
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}
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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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* The kernel stack for SVC mode will be updated on return
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* from this routine.
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*/
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set_stackptr(PSR_IRQ32_MODE, irqstack.virtual + NBPG);
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set_stackptr(PSR_UND32_MODE, undstack.virtual + NBPG);
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set_stackptr(PSR_ABT32_MODE, abtstack.virtual + NBPG);
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/* Set-up exception handlers. */
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/*
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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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* irq, fiq
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* OFW retains: reset
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*/
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{
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int our_vecnums[] = {1, 2, 3, 4, 5, 6, 7};
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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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/* Now for the SHARK-specific part of the FIQ set-up */
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fiqhandler.fh_func = shark_fiq;
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fiqhandler.fh_size = shark_fiq_end - shark_fiq;
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fiqhandler.fh_mask = 0x01; /* XXX ??? */
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fiqhandler.fh_r8 = isa_io_virtaddr;
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fiqhandler.fh_r9 = 0; /* no routine right now */
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fiqhandler.fh_r10 = 0; /* no arg right now */
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fiqhandler.fh_r11 = 0; /* scratch */
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fiqhandler.fh_r12 = 0; /* scratch */
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fiqhandler.fh_r13 = 0; /* must set a stack when r9 is set! */
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if (fiq_claim(&fiqhandler))
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panic("Cannot claim FIQ vector.\n");
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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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}
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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.virtual + 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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static void
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process_kernel_args(void)
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{
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#ifdef RB_QUIET
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int bool;
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#endif
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#if defined(RB_QUIET) && defined(BOOT_QUIETLY)
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boothowto |= RB_QUIET;
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#endif
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/* Process all the generic ARM boot options */
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parse_mi_bootargs(boot_args);
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#ifdef RB_QUIET
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if (get_bootconf_option(args, "noquiet", BOOTOPT_TYPE_BOOLEAN, &bool)) {
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if (!bool)
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boothowto |= RB_QUIET;
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else
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boothowto &= ~RB_QUIET;
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}
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if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &bool)) {
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if (bool)
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boothowto |= RB_QUIET;
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else
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boothowto &= ~RB_QUIET;
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}
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#endif
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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("ofbus", &aa))
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panic("ofw root ofbus not configured");
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}
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