900 lines
26 KiB
C
900 lines
26 KiB
C
/* $NetBSD: iq80310_machdep.c,v 1.16 2002/01/20 03:41:48 thorpej Exp $ */
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/*
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* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1997,1998 Mark Brinicombe.
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* Copyright (c) 1997,1998 Causality Limited.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Mark Brinicombe
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* for the NetBSD Project.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Machine dependant functions for kernel setup for Intel IQ80310 evaluation
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* boards using RedBoot firmware.
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*/
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#include "opt_ddb.h"
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#include "opt_pmap_debug.h"
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/exec.h>
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#include <sys/proc.h>
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#include <sys/msgbuf.h>
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#include <sys/reboot.h>
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#include <sys/termios.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/bootconfig.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/frame.h>
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#include <arm/undefined.h>
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#include <arm/arm32/machdep.h>
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#include <arm/xscale/i80312reg.h>
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#include <arm/xscale/i80312var.h>
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#include <dev/pci/ppbreg.h>
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#include <evbarm/iq80310/iq80310reg.h>
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#include <evbarm/iq80310/iq80310var.h>
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#include <evbarm/iq80310/obiovar.h>
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#include "opt_ipkdb.h"
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/*
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* Address to call from cpu_reset() to reset the machine.
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* This is machine architecture dependant as it varies depending
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* on where the ROM appears when you turn the MMU off.
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*/
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u_int cpu_reset_address = 0;
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/* Define various stack sizes in pages */
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#define IRQ_STACK_SIZE 1
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#define ABT_STACK_SIZE 1
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#ifdef IPKDB
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#define UND_STACK_SIZE 2
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#else
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#define UND_STACK_SIZE 1
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#endif
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BootConfig bootconfig; /* Boot config storage */
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char *boot_args = NULL;
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char *boot_file = NULL;
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vm_offset_t physical_start;
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vm_offset_t physical_freestart;
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vm_offset_t physical_freeend;
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vm_offset_t physical_end;
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u_int free_pages;
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vm_offset_t pagetables_start;
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int physmem = 0;
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/*int debug_flags;*/
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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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/* Physical and virtual addresses for some global pages */
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pv_addr_t systempage;
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pv_addr_t irqstack;
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pv_addr_t undstack;
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pv_addr_t abtstack;
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pv_addr_t kernelstack;
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pv_addr_t minidataclean;
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vm_offset_t msgbufphys;
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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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#ifdef PMAP_DEBUG
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extern int pmap_debug_level;
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#endif
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#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
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#define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */
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#define KERNEL_PT_IOPXS 2 /* Page table for mapping i80312 */
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#define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */
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#define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2))
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#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
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pt_entry_t kernel_pt_table[NUM_KERNEL_PTS];
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struct user *proc0paddr;
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/* Prototypes */
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void consinit(void);
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#include "com.h"
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#if NCOM > 0
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#include <dev/ic/comreg.h>
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#include <dev/ic/comvar.h>
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#endif
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#ifndef CONSPEED
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#define CONSPEED B115200 /* What RedBoot uses */
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#endif
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#ifndef CONMODE
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#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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#endif
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#ifndef CONUNIT
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#define CONUNIT 0
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#endif
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int comcnspeed = CONSPEED;
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int comcnmode = CONMODE;
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int comcnunit = CONUNIT;
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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
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*
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* Deal with any syncing, unmounting, dumping and shutdown hooks,
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* then reset the CPU.
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*/
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void
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cpu_reboot(int howto, char *bootstr)
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{
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#ifdef DIAGNOSTIC
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/* info */
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printf("boot: howto=%08x curproc=%p\n", howto, curproc);
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#endif
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/*
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* If we are still cold then hit the air brakes
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* and crash to earth fast
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*/
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if (cold) {
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doshutdownhooks();
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printf("The operating system has halted.\n");
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printf("Please press any key to reboot.\n\n");
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cngetc();
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printf("rebooting...\n");
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cpu_reset();
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/*NOTREACHED*/
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}
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/* Disable console buffering */
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/*
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* If RB_NOSYNC was not specified sync the discs.
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* Note: Unless cold is set to 1 here, syslogd will die during the
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* unmount. It looks like syslogd is getting woken up only to find
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* that it cannot page part of the binary in as the filesystem has
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* been unmounted.
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*/
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if (!(howto & RB_NOSYNC))
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bootsync();
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/* Say NO to interrupts */
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splhigh();
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/* Do a dump if requested. */
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if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
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dumpsys();
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/* Run any shutdown hooks */
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doshutdownhooks();
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/* Make sure IRQ's are disabled */
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IRQdisable;
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if (howto & RB_HALT) {
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printf("The operating system has halted.\n");
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printf("Please press any key to reboot.\n\n");
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cngetc();
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}
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printf("rebooting...\n");
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cpu_reset();
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/*NOTREACHED*/
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}
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/*
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* Mapping table for core kernel memory. This memory is mapped at init
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* time with section mappings.
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*/
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struct l1_sec_map {
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vaddr_t va;
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vaddr_t pa;
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vsize_t size;
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int flags;
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} l1_sec_table[] = {
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/*
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* Map the on-board devices VA == PA so that we can access them
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* with the MMU on or off.
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*/
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{
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IQ80310_OBIO_BASE,
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IQ80310_OBIO_BASE,
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IQ80310_OBIO_SIZE,
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0,
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},
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{
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0,
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0,
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0,
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0,
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}
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};
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/*
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* u_int initarm(...)
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*
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* Initial entry point on startup. This gets called before main() is
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* entered.
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* It should be responsible for setting up everything that must be
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* in place when main is called.
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* This includes
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* Taking a copy of the boot configuration structure.
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* Initialising the physical console so characters can be printed.
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* Setting up page tables for the kernel
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* Relocating the kernel to the bottom of physical memory
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*/
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u_int
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initarm(void *arg)
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{
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extern vaddr_t xscale_cache_clean_addr, xscale_minidata_clean_addr;
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extern vsize_t xscale_minidata_clean_size;
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int loop;
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int loop1;
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u_int l1pagetable;
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u_int l2pagetable;
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extern char page0[], page0_end[];
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pv_addr_t kernel_l1pt;
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pv_addr_t kernel_ptpt;
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paddr_t memstart;
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psize_t memsize;
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/*
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* Clear out the 7-segment display. Whee, the first visual
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* indication that we're running kernel code.
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*/
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iq80310_7seg(' ', ' ');
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/*
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* Heads up ... Setup the CPU / MMU / TLB functions
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*/
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if (set_cpufuncs())
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panic("cpu not recognized!");
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/* Calibrate the delay loop. */
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iq80310_calibrate_delay();
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/*
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* Since we map the on-board devices VA==PA, and the kernel
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* is running VA==PA, it's possible for us to initialize
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* the console now.
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*/
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consinit();
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/* Talk to the user */
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printf("\nNetBSD/evbarm (IQ80310) booting ...\n");
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/*
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* Reset the secondary PCI bus. RedBoot doesn't stop devices
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* on the PCI bus before handing us control, so we have to
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* do this.
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*
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* XXX This is arguably a bug in RedBoot, and doing this reset
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* XXX could be problematic in the future if we encounter an
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* XXX application where the PPB in the i80312 is used as a
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* XXX PPB.
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*/
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{
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uint32_t reg;
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printf("Resetting secondary PCI bus...\n");
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reg = bus_space_read_4(&obio_bs_tag,
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I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL);
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bus_space_write_4(&obio_bs_tag,
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I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL,
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reg | PPB_BC_SECONDARY_RESET);
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delay(10 * 1000); /* 10ms enough? */
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bus_space_write_4(&obio_bs_tag,
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I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL,
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reg);
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}
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/*
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* Okay, RedBoot has provided us with the following memory map:
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*
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* Physical Address Range Description
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* ----------------------- ----------------------------------
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* 0x00000000 - 0x00000fff flash Memory
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* 0x00001000 - 0x00001fff 80312 Internal Registers
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* 0x00002000 - 0x007fffff flash Memory
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* 0x00800000 - 0x7fffffff PCI ATU Outbound Direct Window
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* 0x80000000 - 0x83ffffff Primary PCI 32-bit Memory
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* 0x84000000 - 0x87ffffff Primary PCI 64-bit Memory
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* 0x88000000 - 0x8bffffff Secondary PCI 32-bit Memory
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* 0x8c000000 - 0x8fffffff Secondary PCI 64-bit Memory
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* 0x90000000 - 0x9000ffff Primary PCI IO Space
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* 0x90010000 - 0x9001ffff Secondary PCI IO Space
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* 0x90020000 - 0x9fffffff Unused
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* 0xa0000000 - 0xbfffffff SDRAM
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* 0xc0000000 - 0xefffffff Unused
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* 0xf0000000 - 0xffffffff 80200 Internal Registers
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*
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*
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* Virtual Address Range C B Description
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* ----------------------- - - ----------------------------------
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* 0x00000000 - 0x00000fff Y Y SDRAM
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* 0x00001000 - 0x00001fff N N 80312 Internal Registers
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* 0x00002000 - 0x007fffff Y N flash Memory
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* 0x00800000 - 0x7fffffff N N PCI ATU Outbound Direct Window
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* 0x80000000 - 0x83ffffff N N Primary PCI 32-bit Memory
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* 0x84000000 - 0x87ffffff N N Primary PCI 64-bit Memory
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* 0x88000000 - 0x8bffffff N N Secondary PCI 32-bit Memory
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* 0x8c000000 - 0x8fffffff N N Secondary PCI 64-bit Memory
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* 0x90000000 - 0x9000ffff N N Primary PCI IO Space
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* 0x90010000 - 0x9001ffff N N Secondary PCI IO Space
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* 0xa0000000 - 0xa0000fff Y N flash
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* 0xa0001000 - 0xbfffffff Y Y SDRAM
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* 0xc0000000 - 0xcfffffff Y Y Cache Flush Region
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* 0xf0000000 - 0xffffffff N N 80200 Internal Registers
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*
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* The first level page table is at 0xa0004000. There are also
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* 2 second-level tables at 0xa0008000 and 0xa0008400.
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*
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* This corresponds roughly to the physical memory map, i.e.
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* we are quite nearly running VA==PA.
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*/
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/*
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* Examine the boot args string for options we need to know about
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* now.
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*/
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#if 0
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process_kernel_args((char *)nwbootinfo.bt_args);
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#endif
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/*
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* Fetch the SDRAM start/size from the i80312 SDRAM configration
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* registers.
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*/
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i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE,
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&memstart, &memsize);
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printf("initarm: Configuring system ...\n");
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/* Fake bootconfig structure for the benefit of pmap.c */
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/* XXX must make the memory description h/w independant */
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bootconfig.dramblocks = 1;
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bootconfig.dram[0].address = memstart;
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bootconfig.dram[0].pages = memsize / NBPG;
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/*
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* Set up the variables that define the availablilty of
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* physical memory. For now, we're going to set
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* physical_freestart to 0xa0200000 (where the kernel
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* was loaded), and allocate the memory we need downwards.
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* If we get too close to the page tables that RedBoot
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* set up, we will panic. We will update physical_freestart
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* and physical_freeend later to reflect what pmap_bootstrap()
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* wants to see.
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*
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* XXX pmap_bootstrap() needs an enema.
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*/
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physical_start = bootconfig.dram[0].address;
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physical_end = physical_start + (bootconfig.dram[0].pages * NBPG);
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physical_freestart = 0xa0009000UL;
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physical_freeend = 0xa0200000UL;
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physmem = (physical_end - physical_start) / NBPG;
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/* Tell the user about the memory */
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printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
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physical_start, physical_end - 1);
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/*
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* Okay, the kernel starts 2MB in from the bottom of physical
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* memory. We are going to allocate our bootstrap pages downwards
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* from there.
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*
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* We need to allocate some fixed page tables to get the kernel
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* going. We allocate one page directory and a number of page
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* tables and store the physical addresses in the kernel_pt_table
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* array.
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*
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* The kernel page directory must be on a 16K boundary. The page
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* tables must be on 4K bounaries. What we do is allocate the
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* page directory on the first 16K boundary that we encounter, and
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* the page tables on 4K boundaries otherwise. Since we allocate
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* at least 3 L2 page tables, we are guaranteed to encounter at
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* least one 16K aligned region.
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*/
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#ifdef VERBOSE_INIT_ARM
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printf("Allocating page tables\n");
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#endif
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free_pages = (physical_freeend - physical_freestart) / NBPG;
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#ifdef VERBOSE_INIT_ARM
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printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
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physical_freestart, free_pages, free_pages);
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#endif
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/* Define a macro to simplify memory allocation */
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#define valloc_pages(var, np) \
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alloc_pages((var).pv_pa, (np)); \
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(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
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#define alloc_pages(var, np) \
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physical_freeend -= ((np) * NBPG); \
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if (physical_freeend < physical_freestart) \
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panic("initarm: out of memory"); \
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(var) = physical_freeend; \
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|
free_pages -= (np); \
|
|
memset((char *)(var), 0, ((np) * NBPG));
|
|
|
|
loop1 = 0;
|
|
kernel_l1pt.pv_pa = 0;
|
|
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
|
|
/* Are we 16KB aligned for an L1 ? */
|
|
if (((physical_freeend - PD_SIZE) & (PD_SIZE - 1)) == 0
|
|
&& kernel_l1pt.pv_pa == 0) {
|
|
valloc_pages(kernel_l1pt, PD_SIZE / NBPG);
|
|
} else {
|
|
alloc_pages(kernel_pt_table[loop1], PT_SIZE / NBPG);
|
|
++loop1;
|
|
}
|
|
}
|
|
|
|
/* This should never be able to happen but better confirm that. */
|
|
if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (PD_SIZE-1)) != 0)
|
|
panic("initarm: Failed to align the kernel page directory\n");
|
|
|
|
/*
|
|
* Allocate a page for the system page mapped to V0x00000000
|
|
* This page will just contain the system vectors and can be
|
|
* shared by all processes.
|
|
*/
|
|
alloc_pages(systempage.pv_pa, 1);
|
|
|
|
/* Allocate a page for the page table to map kernel page tables. */
|
|
valloc_pages(kernel_ptpt, PT_SIZE / NBPG);
|
|
|
|
/* Allocate stacks for all modes */
|
|
valloc_pages(irqstack, IRQ_STACK_SIZE);
|
|
valloc_pages(abtstack, ABT_STACK_SIZE);
|
|
valloc_pages(undstack, UND_STACK_SIZE);
|
|
valloc_pages(kernelstack, UPAGES);
|
|
|
|
/* Allocate enough pages for cleaning the Mini-Data cache. */
|
|
KASSERT(xscale_minidata_clean_size <= NBPG);
|
|
valloc_pages(minidataclean, 1);
|
|
xscale_minidata_clean_addr = minidataclean.pv_va;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
|
|
irqstack.pv_va);
|
|
printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
|
|
abtstack.pv_va);
|
|
printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
|
|
undstack.pv_va);
|
|
printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
|
|
kernelstack.pv_va);
|
|
#endif
|
|
|
|
/*
|
|
* XXX Defer this to later so that we can reclaim the memory
|
|
* XXX used by the RedBoot page tables.
|
|
*/
|
|
alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG);
|
|
|
|
/*
|
|
* Ok we have allocated physical pages for the primary kernel
|
|
* page tables
|
|
*/
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
|
|
#endif
|
|
|
|
/*
|
|
* Now we start consturction of the L1 page table
|
|
* We start by mapping the L2 page tables into the L1.
|
|
* This means that we can replace L1 mappings later on if necessary
|
|
*/
|
|
l1pagetable = kernel_l1pt.pv_pa;
|
|
|
|
/* Map the L2 pages tables in the L1 page table */
|
|
map_pagetable(l1pagetable, 0x00000000,
|
|
kernel_pt_table[KERNEL_PT_SYS]);
|
|
map_pagetable(l1pagetable, KERNEL_BASE,
|
|
kernel_pt_table[KERNEL_PT_KERNEL]);
|
|
map_pagetable(l1pagetable, IQ80310_IOPXS_VBASE,
|
|
kernel_pt_table[KERNEL_PT_IOPXS]);
|
|
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
|
|
map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
|
|
kernel_pt_table[KERNEL_PT_VMDATA + loop]);
|
|
map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE,
|
|
kernel_ptpt.pv_pa);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Mapping kernel\n");
|
|
#endif
|
|
|
|
/* Now we fill in the L2 pagetable for the kernel static code/data */
|
|
l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL];
|
|
|
|
{
|
|
extern char etext[], _end[];
|
|
size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
|
|
size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
|
|
u_int logical;
|
|
|
|
textsize = (textsize + PGOFSET) & ~PGOFSET;
|
|
totalsize = (totalsize + PGOFSET) & ~PGOFSET;
|
|
|
|
logical = 0x00200000; /* offset of kernel in RAM */
|
|
|
|
/*
|
|
* This maps the kernel text/data/bss VA==PA.
|
|
*/
|
|
logical += map_chunk(l1pagetable, l2pagetable,
|
|
KERNEL_BASE + logical,
|
|
physical_start + logical, textsize,
|
|
AP_KRW, PT_CACHEABLE);
|
|
logical += map_chunk(l1pagetable, l2pagetable,
|
|
KERNEL_BASE + logical,
|
|
physical_start + logical, totalsize - textsize,
|
|
AP_KRW, PT_CACHEABLE);
|
|
|
|
#if 0 /* XXX No symbols yet. */
|
|
logical += map_chunk(l1pagetable, l2pagetable,
|
|
KERNEL_BASE + logical,
|
|
physical_start + logical, kernexec->a_syms + sizeof(int)
|
|
+ *(u_int *)((int)end + kernexec->a_syms + sizeof(int)),
|
|
AP_KRW, PT_CACHEABLE);
|
|
#endif
|
|
}
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Constructing L2 page tables\n");
|
|
#endif
|
|
|
|
/* Map the stack pages */
|
|
map_chunk(0, l2pagetable, irqstack.pv_va, irqstack.pv_pa,
|
|
IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, abtstack.pv_va, abtstack.pv_pa,
|
|
ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, undstack.pv_va, undstack.pv_pa,
|
|
UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, kernelstack.pv_va, kernelstack.pv_pa,
|
|
UPAGES * NBPG, AP_KRW, PT_CACHEABLE);
|
|
map_chunk(0, l2pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
|
|
PD_SIZE, AP_KRW, 0);
|
|
|
|
/* Map the Mini-Data cache clean area. */
|
|
map_chunk(0, l2pagetable, minidataclean.pv_va, minidataclean.pv_pa,
|
|
NBPG, AP_KRW, PT_CACHEABLE);
|
|
|
|
/* Map the page table that maps the kernel pages */
|
|
map_entry_nc(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa);
|
|
|
|
/*
|
|
* Map entries in the page table used to map PTE's
|
|
* Basically every kernel page table gets mapped here
|
|
*/
|
|
/* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */
|
|
l2pagetable = kernel_ptpt.pv_pa;
|
|
map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_KERNEL]);
|
|
map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)),
|
|
kernel_ptpt.pv_pa);
|
|
map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_SYS]);
|
|
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
|
|
map_entry_nc(l2pagetable, ((KERNEL_VM_BASE +
|
|
(loop * 0x00400000)) >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_VMDATA + loop]);
|
|
|
|
/*
|
|
* Map the system page in the kernel page table for the bottom 1Meg
|
|
* of the virtual memory map.
|
|
*/
|
|
l2pagetable = kernel_pt_table[KERNEL_PT_SYS];
|
|
map_entry(l2pagetable, 0x00000000, systempage.pv_pa);
|
|
|
|
/*
|
|
* Map devices we can map w/ section mappings.
|
|
*/
|
|
loop = 0;
|
|
while (l1_sec_table[loop].size) {
|
|
vm_size_t sz;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa,
|
|
l1_sec_table[loop].pa + l1_sec_table[loop].size - 1,
|
|
l1_sec_table[loop].va);
|
|
#endif
|
|
for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_SEC_SIZE)
|
|
map_section(l1pagetable, l1_sec_table[loop].va + sz,
|
|
l1_sec_table[loop].pa + sz,
|
|
l1_sec_table[loop].flags);
|
|
++loop;
|
|
}
|
|
|
|
/*
|
|
* Map the PCI I/O spaces and i80312 registers. These are too
|
|
* small to be mapped w/ section mappings.
|
|
*/
|
|
l2pagetable = kernel_pt_table[KERNEL_PT_IOPXS];
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Mapping PIOW 0x%08lx -> 0x%08lx @ 0x%08lx\n",
|
|
I80312_PCI_XLATE_PIOW_BASE,
|
|
I80312_PCI_XLATE_PIOW_BASE + I80312_PCI_XLATE_IOSIZE - 1,
|
|
IQ80310_PIOW_VBASE);
|
|
#endif
|
|
map_chunk(0, l2pagetable, IQ80310_PIOW_VBASE,
|
|
I80312_PCI_XLATE_PIOW_BASE, I80312_PCI_XLATE_IOSIZE, AP_KRW, 0);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Mapping SIOW 0x%08lx -> 0x%08lx @ 0x%08lx\n",
|
|
I80312_PCI_XLATE_SIOW_BASE,
|
|
I80312_PCI_XLATE_SIOW_BASE + I80312_PCI_XLATE_IOSIZE - 1,
|
|
IQ80310_SIOW_VBASE);
|
|
#endif
|
|
map_chunk(0, l2pagetable, IQ80310_SIOW_VBASE,
|
|
I80312_PCI_XLATE_SIOW_BASE, I80312_PCI_XLATE_IOSIZE, AP_KRW, 0);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Mapping 80312 0x%08lx -> 0x%08lx @ 0x%08lx\n",
|
|
I80312_PMMR_BASE,
|
|
I80312_PMMR_BASE + I80312_PMMR_SIZE - 1,
|
|
IQ80310_80312_VBASE);
|
|
#endif
|
|
map_chunk(0, l2pagetable, IQ80310_80312_VBASE,
|
|
I80312_PMMR_BASE, I80312_PMMR_SIZE, AP_KRW, 0);
|
|
|
|
/*
|
|
* Give the XScale global cache clean code an appropriately
|
|
* sized chunk of unmapped VA space starting at 0xff000000
|
|
* (our device mappings end before this address).
|
|
*/
|
|
xscale_cache_clean_addr = 0xff000000U;
|
|
|
|
/*
|
|
* Now we have the real page tables in place so we can switch to them.
|
|
* Once this is done we will be running with the REAL kernel page
|
|
* tables.
|
|
*/
|
|
|
|
/*
|
|
* Update the physical_freestart/physical_freeend/free_pages
|
|
* variables.
|
|
*/
|
|
{
|
|
extern char _end[];
|
|
|
|
physical_freestart = (((uintptr_t) _end) + PGOFSET) & ~PGOFSET;
|
|
physical_freeend = physical_end;
|
|
free_pages = (physical_freeend - physical_freestart) / NBPG;
|
|
}
|
|
|
|
/* Switch tables */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
|
|
physical_freestart, free_pages, free_pages);
|
|
printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
|
|
#endif
|
|
setttb(kernel_l1pt.pv_pa);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("done!\n");
|
|
#endif
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("bootstrap done.\n");
|
|
#endif
|
|
|
|
/* Right, set up the vectors at the bottom of page 0 */
|
|
memcpy((char *)0x00000000, page0, page0_end - page0);
|
|
|
|
/* We have modified a text page so sync the icache */
|
|
cpu_cache_syncI();
|
|
|
|
/*
|
|
* Pages were allocated during the secondary bootstrap for the
|
|
* stacks for different CPU modes.
|
|
* We must now set the r13 registers in the different CPU modes to
|
|
* point to these stacks.
|
|
* Since the ARM stacks use STMFD etc. we must set r13 to the top end
|
|
* of the stack memory.
|
|
*/
|
|
printf("init subsystems: stacks ");
|
|
|
|
set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG);
|
|
set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG);
|
|
set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG);
|
|
|
|
/*
|
|
* Well we should set a data abort handler.
|
|
* Once things get going this will change as we will need a proper
|
|
* handler.
|
|
* Until then we will use a handler that just panics but tells us
|
|
* why.
|
|
* Initialisation of the vectors will just panic on a data abort.
|
|
* This just fills in a slighly better one.
|
|
*/
|
|
printf("vectors ");
|
|
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;
|
|
|
|
/* At last !
|
|
* We now have the kernel in physical memory from the bottom upwards.
|
|
* Kernel page tables are physically above this.
|
|
* The kernel is mapped to KERNEL_TEXT_BASE
|
|
* The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff
|
|
* The page tables are mapped to 0xefc00000
|
|
*/
|
|
|
|
/* Initialise the undefined instruction handlers */
|
|
printf("undefined ");
|
|
undefined_init();
|
|
|
|
/* Boot strap pmap telling it where the kernel page table is */
|
|
printf("pmap ");
|
|
pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt);
|
|
|
|
/* Setup the IRQ system */
|
|
printf("irq ");
|
|
irq_init();
|
|
printf("done.\n");
|
|
|
|
#ifdef IPKDB
|
|
/* Initialise ipkdb */
|
|
ipkdb_init();
|
|
if (boothowto & RB_KDB)
|
|
ipkdb_connect(0);
|
|
#endif
|
|
|
|
#ifdef DDB
|
|
db_machine_init();
|
|
|
|
/* Firmware doesn't load symbols. */
|
|
ddb_init(0, NULL, NULL);
|
|
|
|
if (boothowto & RB_KDB)
|
|
Debugger();
|
|
#endif
|
|
|
|
/* We return the new stack pointer address */
|
|
return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
|
|
}
|
|
|
|
#if 0
|
|
void
|
|
process_kernel_args(char *args)
|
|
{
|
|
static char bootargs[MAX_BOOT_STRING + 1];
|
|
|
|
boothowto = 0;
|
|
|
|
/* Make a local copy of the bootargs */
|
|
strncpy(bootargs, args, MAX_BOOT_STRING);
|
|
|
|
args = bootargs;
|
|
boot_file = bootargs;
|
|
|
|
/* Skip the kernel image filename */
|
|
while (*args != ' ' && *args != 0)
|
|
++args;
|
|
|
|
if (*args != 0)
|
|
*args++ = 0;
|
|
|
|
while (*args == ' ')
|
|
++args;
|
|
|
|
boot_args = args;
|
|
|
|
printf("bootfile: %s\n", boot_file);
|
|
printf("bootargs: %s\n", boot_args);
|
|
|
|
parse_mi_bootargs(boot_args);
|
|
}
|
|
#endif
|
|
|
|
void
|
|
consinit(void)
|
|
{
|
|
static const bus_addr_t comcnaddrs[] = {
|
|
IQ80310_UART2, /* com0 (J9) */
|
|
IQ80310_UART1, /* com1 (J10) */
|
|
};
|
|
static int consinit_called;
|
|
|
|
if (consinit_called != 0)
|
|
return;
|
|
|
|
consinit_called = 1;
|
|
|
|
#if NCOM > 0
|
|
if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
|
|
COM_FREQ, comcnmode))
|
|
panic("can't init serial console @%lx", IQ80310_UART2);
|
|
#else
|
|
panic("serial console @%lx not configured", IQ80310_UART2);
|
|
#endif
|
|
}
|