1094 lines
30 KiB
C
1094 lines
30 KiB
C
/* $NetBSD: smdk2800_machdep.c,v 1.16 2003/08/03 14:11:16 bsh Exp $ */
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/*
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* Copyright (c) 2002 Fujitsu Component Limited
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* Copyright (c) 2002 Genetec Corporation
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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. Neither the name of The Fujitsu Component Limited nor the name of
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* Genetec corporation may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC
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* CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC
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* CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* 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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/*
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* Copyright (c) 2001,2002 ARM Ltd
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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. The name of the company may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ARM LTD ``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 ARM LTD
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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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/*
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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 integrator board
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*
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* Created : 24/11/97
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*/
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/*
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* Machine dependant functions for kernel setup for Samsung SMDK2800
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* derived from integrator_machdep.c
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smdk2800_machdep.c,v 1.16 2003/08/03 14:11:16 bsh Exp $");
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#include "opt_ddb.h"
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#include "opt_kgdb.h"
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#include "opt_ipkdb.h"
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#include "opt_pmap_debug.h"
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#include "opt_md.h"
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#include "pci.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 <sys/ksyms.h>
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#include <uvm/uvm_extern.h>
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#include <dev/cons.h>
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#include <dev/md.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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#ifdef KGDB
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#include <sys/kgdb.h>
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#endif
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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 <machine/intr.h>
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#include <arm/undefined.h>
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#include <arm/arm32/machdep.h>
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#include <arm/s3c2xx0/s3c2800reg.h>
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#include <arm/s3c2xx0/s3c2800var.h>
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#include "ksyms.h"
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#ifndef SDRAM_START
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#define SDRAM_START S3C2800_DBANK0_START
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#endif
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#ifndef SDRAM_SIZE
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#define SDRAM_SIZE (32*1024*1024)
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#endif
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/*
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* Address to map I/O registers in early initialize stage.
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*/
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#define SMDK2800_IO_AREA_VBASE 0xfd000000
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#define SMDK2800_VBASE_FREE 0xfd200000
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/* Kernel text starts 2MB in from the bottom of the kernel address space. */
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#define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
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#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
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/*
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* The range 0xc1000000 - 0xccffffff is available for kernel VM space
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* Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
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*/
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#define KERNEL_VM_SIZE 0x0C000000
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/* Memory disk support */
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#if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR)
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#define DO_MEMORY_DISK
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/* We have memory disk image outside of the kernel on ROM. */
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#ifdef MEMORY_DISK_ROOT_ROM
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/* map the image directory and use read-only */
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#else
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/* copy the image to RAM */
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#endif
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#endif
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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 = (u_int)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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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 /* L2 table for mapping zero page */
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#define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
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#define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */
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#define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
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#define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
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#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
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pv_addr_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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void kgdb_port_init(void);
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static int
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bootstrap_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
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int cacheable, bus_space_handle_t * bshp);
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static void map_builtin_peripherals(void);
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static void copy_io_area_map(pd_entry_t * new_pd);
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/* A load of console goo. */
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#include "vga.h"
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#if NVGA > 0
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#include <dev/ic/mc6845reg.h>
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#include <dev/ic/pcdisplayvar.h>
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#include <dev/ic/vgareg.h>
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#include <dev/ic/vgavar.h>
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#endif
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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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#include "sscom.h"
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#if NSSCOM > 0
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#include "opt_sscom.h"
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#include <arm/s3c2xx0/sscom_var.h>
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#endif
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/*
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* Define the default console speed for the board. This is generally
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* what the firmware provided with the board defaults to.
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*/
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#ifndef CONSPEED
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#define CONSPEED B115200 /* TTYDEF_SPEED */
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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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int comcnspeed = CONSPEED;
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int comcnmode = CONMODE;
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struct bus_space bootstrap_bs_tag;
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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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cpu_reset_address = vtophys((u_int)s3c2800_softreset);
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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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#define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v))
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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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int loop;
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int loop1;
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u_int l1pagetable;
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extern int etext asm("_etext");
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extern int end asm("_end");
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pv_addr_t kernel_l1pt;
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struct s3c2800_softc temp_softc; /* used to initialize IO regs */
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int progress_counter = 0;
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#ifdef DO_MEMORY_DISK
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vm_offset_t md_root_start;
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#define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE)
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#endif
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#define gpio_read8(reg) bus_space_read_1(temp_softc.sc_sx.sc_iot, \
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temp_softc.sc_sx.sc_gpio_ioh, (reg))
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#define LEDSTEP() __LED(progress_counter++)
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#define pdatc (*(volatile uint8_t *)(S3C2800_GPIO_BASE+GPIO_PDATC))
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#define __LED(x) (pdatc = (pdatc & ~0x07) | (~(x) & 0x07))
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LEDSTEP();
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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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LEDSTEP();
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map_builtin_peripherals();
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/*
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* prepare fake bus space tag
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*/
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bootstrap_bs_tag = s3c2xx0_bs_tag;
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bootstrap_bs_tag.bs_map = bootstrap_bs_map;
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s3c2xx0_softc = &temp_softc.sc_sx;
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s3c2xx0_softc->sc_iot = &bootstrap_bs_tag;
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bootstrap_bs_map(&bootstrap_bs_tag, S3C2800_GPIO_BASE,
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S3C2800_GPIO_SIZE, 0, &temp_softc.sc_sx.sc_gpio_ioh);
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bootstrap_bs_map(&bootstrap_bs_tag, S3C2800_INTCTL_BASE,
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S3C2800_INTCTL_SIZE, 0, &temp_softc.sc_sx.sc_intctl_ioh);
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bootstrap_bs_map(&bootstrap_bs_tag, S3C2800_CLKMAN_BASE,
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S3C2800_CLKMAN_SIZE, 0, &temp_softc.sc_sx.sc_clkman_ioh);
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#undef __LED
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#define __LED(x) \
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bus_space_write_1(&bootstrap_bs_tag, \
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temp_softc.sc_sx.sc_gpio_ioh, \
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GPIO_PDATC, (~(x) & 0x07) | \
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(bus_space_read_1(&bootstrap_bs_tag, \
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temp_softc.sc_sx.sc_gpio_ioh, GPIO_PDATC ) & ~0x07))
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LEDSTEP();
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/* Disable all peripheral interrupts */
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bus_space_write_4(&bootstrap_bs_tag, temp_softc.sc_sx.sc_intctl_ioh,
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INTCTL_INTMSK, 0);
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s3c2800_clock_freq(s3c2xx0_softc);
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consinit();
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#ifdef VERBOSE_INIT_ARM
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printf("consinit done\n");
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#endif
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#ifdef KGDB
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LEDSTEP();
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kgdb_port_init();
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#endif
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LEDSTEP();
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#ifdef VERBOSE_INIT_ARM
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/* Talk to the user */
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printf("\nNetBSD/evbarm (SMDK2800) booting ...\n");
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#endif
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/*
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* Ok we have 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 - 0x00ffffff Intel flash Memory (16MB)
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* 0x02000000 - 0x020fffff AMD flash Memory (1MB)
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* or (depend on DIPSW setting)
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* 0x00000000 - 0x000fffff AMD flash Memory (1MB)
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* 0x02000000 - 0x02ffffff Intel flash Memory (16MB)
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*
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* 0x08000000 - 0x09ffffff SDRAM (32MB)
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* 0x20000000 - 0x3fffffff PCI space
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*
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* The initarm() has the responsibility for creating the kernel
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* page tables.
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* It must also set up various memory pointers that are used
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* by pmap etc.
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*/
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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 independent */
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bootconfig.dramblocks = 1;
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bootconfig.dram[0].address = SDRAM_START;
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bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE;
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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 0x08200000 (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 bottom of SDRAM, we
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* will panic. We will update physical_freestart and
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* physical_freeend later to reflect what pmap_bootstrap()
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* wants to see.
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*
|
|
* XXX pmap_bootstrap() needs an enema.
|
|
*/
|
|
physical_start = bootconfig.dram[0].address;
|
|
physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
|
|
|
|
#if DO_MEMORY_DISK
|
|
#ifdef MEMORY_DISK_ROOT_ROM
|
|
md_root_start = MEMORY_DISK_ROOT_ADDR;
|
|
boothowto |= RB_RDONLY;
|
|
#else
|
|
/* Reserve physmem for ram disk */
|
|
md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1));
|
|
printf("Reserve %ld bytes for memory disk\n",
|
|
physical_end - md_root_start);
|
|
/* copy fs contents */
|
|
memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR,
|
|
MD_ROOT_SIZE);
|
|
physical_end = md_root_start;
|
|
#endif
|
|
#endif
|
|
|
|
physical_freestart = 0x08000000UL; /* XXX */
|
|
physical_freeend = 0x08200000UL;
|
|
|
|
physmem = (physical_end - physical_start) / PAGE_SIZE;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
/* Tell the user about the memory */
|
|
printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
|
|
physical_start, physical_end - 1);
|
|
#endif
|
|
|
|
/*
|
|
* XXX
|
|
* Okay, the kernel starts 2MB in from the bottom of physical
|
|
* memory. We are going to allocate our bootstrap pages downwards
|
|
* from there.
|
|
*
|
|
* We need to allocate some fixed page tables to get the kernel
|
|
* going. We allocate one page directory and a number of page
|
|
* tables and store the physical addresses in the kernel_pt_table
|
|
* array.
|
|
*
|
|
* The kernel page directory must be on a 16K boundary. The page
|
|
* tables must be on 4K bounaries. What we do is allocate the
|
|
* page directory on the first 16K boundary that we encounter, and
|
|
* the page tables on 4K boundaries otherwise. Since we allocate
|
|
* at least 3 L2 page tables, we are guaranteed to encounter at
|
|
* least one 16K aligned region.
|
|
*/
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Allocating page tables\n");
|
|
#endif
|
|
|
|
free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
|
|
physical_freestart, free_pages, free_pages);
|
|
#endif
|
|
|
|
/* Define a macro to simplify memory allocation */
|
|
#define valloc_pages(var, np) \
|
|
alloc_pages((var).pv_pa, (np)); \
|
|
(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
|
|
|
|
#define alloc_pages(var, np) \
|
|
physical_freeend -= ((np) * PAGE_SIZE); \
|
|
if (physical_freeend < physical_freestart) \
|
|
panic("initarm: out of memory"); \
|
|
(var) = physical_freeend; \
|
|
free_pages -= (np); \
|
|
memset((char *)(var), 0, ((np) * PAGE_SIZE));
|
|
|
|
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 - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
|
|
&& kernel_l1pt.pv_pa == 0) {
|
|
valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
|
|
} else {
|
|
valloc_pages(kernel_pt_table[loop1],
|
|
L2_TABLE_SIZE / PAGE_SIZE);
|
|
++loop1;
|
|
}
|
|
}
|
|
|
|
/* This should never be able to happen but better confirm that. */
|
|
if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_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 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);
|
|
|
|
#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
|
|
|
|
alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
|
|
|
|
LEDSTEP();
|
|
|
|
/*
|
|
* 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 construction 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 */
|
|
pmap_link_l2pt(l1pagetable, 0x00000000,
|
|
&kernel_pt_table[KERNEL_PT_SYS]);
|
|
for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
|
|
pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
|
|
&kernel_pt_table[KERNEL_PT_KERNEL + loop]);
|
|
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
|
|
pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
|
|
&kernel_pt_table[KERNEL_PT_VMDATA + loop]);
|
|
|
|
/* update the top of the kernel VM */
|
|
pmap_curmaxkvaddr =
|
|
KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Mapping kernel\n");
|
|
#endif
|
|
|
|
/* Now we fill in the L2 pagetable for the kernel static code/data */
|
|
{
|
|
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 */
|
|
|
|
logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
|
|
physical_start + logical, textsize,
|
|
VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
|
|
logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
|
|
physical_start + logical, totalsize - textsize,
|
|
VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
|
|
}
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Constructing L2 page tables\n");
|
|
#endif
|
|
|
|
/* Map the stack pages */
|
|
pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
|
|
IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
|
|
PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
|
|
ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
|
|
PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
|
|
UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
|
|
PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
|
|
UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
|
|
|
|
pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
|
|
L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE);
|
|
|
|
for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
|
|
pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
|
|
kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
|
|
}
|
|
|
|
/* Map the vector page. */
|
|
#if 1
|
|
/* MULTI-ICE requires that page 0 is NC/NB so that it can download the
|
|
* cache-clean code there. */
|
|
pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
|
|
VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE);
|
|
#else
|
|
pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
|
|
VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
|
|
#endif
|
|
|
|
#ifdef MEMORY_DISK_DYNAMIC
|
|
/* map MD root image */
|
|
bootstrap_bs_map(&bootstrap_bs_tag, md_root_start, MD_ROOT_SIZE,
|
|
BUS_SPACE_MAP_CACHEABLE | BUS_SPACE_MAP_LINEAR,
|
|
(bus_space_handle_t *)&md_root_start);
|
|
|
|
md_root_setconf((void *)md_root_start, MD_ROOT_SIZE);
|
|
#endif /* MEMORY_DISK_DYNAMIC */
|
|
/*
|
|
* map integrated peripherals at same address in l1pagetable
|
|
* so that we can continue to use console.
|
|
*/
|
|
copy_io_area_map((pd_entry_t *)l1pagetable);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
{
|
|
physical_freestart = physical_start +
|
|
(((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE);
|
|
physical_freeend = physical_end;
|
|
free_pages =
|
|
(physical_freeend - physical_freestart) / PAGE_SIZE;
|
|
}
|
|
|
|
/* 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
|
|
LEDSTEP();
|
|
cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
|
|
setttb(kernel_l1pt.pv_pa);
|
|
cpu_tlb_flushID();
|
|
cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
|
|
|
|
/*
|
|
* Moved from cpu_startup() as data_abort_handler() references
|
|
* this during uvm init
|
|
*/
|
|
proc0paddr = (struct user *)kernelstack.pv_va;
|
|
lwp0.l_addr = proc0paddr;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("done!\n");
|
|
#endif
|
|
|
|
#if 0
|
|
/*
|
|
* The IFPGA registers have just moved.
|
|
* Detach the diagnostic serial port and reattach at the new address.
|
|
*/
|
|
plcomcndetach();
|
|
/*
|
|
* XXX this should only be done in main() but it useful to
|
|
* have output earlier ...
|
|
*/
|
|
consinit();
|
|
#endif
|
|
|
|
LEDSTEP();
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("bootstrap done.\n");
|
|
#endif
|
|
|
|
arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("init subsystems: stacks ");
|
|
#endif
|
|
|
|
set_stackptr(PSR_IRQ32_MODE,
|
|
irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
|
|
set_stackptr(PSR_ABT32_MODE,
|
|
abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
|
|
set_stackptr(PSR_UND32_MODE,
|
|
undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
|
|
|
|
LEDSTEP();
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("vectors ");
|
|
#endif
|
|
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;
|
|
|
|
/* Initialise the undefined instruction handlers */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("undefined ");
|
|
#endif
|
|
undefined_init();
|
|
|
|
LEDSTEP();
|
|
|
|
/* Load memory into UVM. */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("page ");
|
|
#endif
|
|
uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
|
|
uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
|
|
atop(physical_freestart), atop(physical_freeend),
|
|
VM_FREELIST_DEFAULT);
|
|
|
|
LEDSTEP();
|
|
/* Boot strap pmap telling it where the kernel page table is */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("pmap ");
|
|
#endif
|
|
pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE,
|
|
KERNEL_VM_BASE + KERNEL_VM_SIZE);
|
|
|
|
LEDSTEP();
|
|
|
|
/* Setup the IRQ system */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("irq ");
|
|
#endif
|
|
/* XXX irq_init(); */
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("done.\n");
|
|
#endif
|
|
|
|
#ifdef BOOTHOWTO_INIT
|
|
boothowto |= BOOTHOWTO_INIT;
|
|
#endif
|
|
{
|
|
uint8_t gpio = ~gpio_read8(GPIO_PDATF);
|
|
|
|
if (gpio & (1<<5)) /* SW3 */
|
|
boothowto ^= RB_SINGLE;
|
|
if (gpio & (1<<7)) /* SW7 */
|
|
boothowto ^= RB_KDB;
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf( "sw: %x boothowto: %x\n", gpio, boothowto );
|
|
#endif
|
|
}
|
|
|
|
#ifdef IPKDB
|
|
/* Initialise ipkdb */
|
|
ipkdb_init();
|
|
if (boothowto & RB_KDB)
|
|
ipkdb_connect(0);
|
|
#endif
|
|
|
|
#ifdef KGDB
|
|
if (boothowto & RB_KDB) {
|
|
kgdb_debug_init = 1;
|
|
kgdb_connect(1);
|
|
}
|
|
#endif
|
|
|
|
#if NKSYMS || defined(DDB) || defined(LKM)
|
|
/* Firmware doesn't load symbols. */
|
|
ksyms_init(0, NULL, NULL);
|
|
#endif
|
|
|
|
#ifdef DDB
|
|
db_machine_init();
|
|
if (boothowto & RB_KDB)
|
|
Debugger();
|
|
#endif
|
|
|
|
/* We return the new stack pointer address */
|
|
return (kernelstack.pv_va + USPACE_SVC_STACK_TOP);
|
|
}
|
|
|
|
void
|
|
consinit(void)
|
|
{
|
|
static int consinit_done = 0;
|
|
bus_space_tag_t iot = s3c2xx0_softc->sc_iot;
|
|
int pclk = s3c2xx0_softc->sc_pclk;
|
|
|
|
if (consinit_done != 0)
|
|
return;
|
|
|
|
consinit_done = 1;
|
|
|
|
#if NSSCOM > 0
|
|
#ifdef SSCOM0CONSOLE
|
|
if (0 == s3c2800_sscom_cnattach(iot, 0, comcnspeed,
|
|
pclk, comcnmode))
|
|
return;
|
|
#endif
|
|
#ifdef SSCOM1CONSOLE
|
|
if (0 == s3c2800_sscom_cnattach(iot, 1, comcnspeed,
|
|
pclk, comcnmode))
|
|
return;
|
|
#endif
|
|
#endif /* NSSCOM */
|
|
#if NCOM>0 && defined(CONCOMADDR)
|
|
if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed,
|
|
COM_FREQ, COM_TYPE_NORMAL, comcnmode))
|
|
panic("can't init serial console @%x", CONCOMADDR);
|
|
return;
|
|
#endif
|
|
|
|
consinit_done = 0;
|
|
}
|
|
|
|
|
|
#ifdef KGDB
|
|
|
|
#if (NSSCOM > 0)
|
|
|
|
#ifdef KGDB_DEVNAME
|
|
const char kgdb_devname[] = KGDB_DEVNAME;
|
|
#else
|
|
const char kgdb_devname[] = "";
|
|
#endif
|
|
|
|
#ifndef KGDB_DEVMODE
|
|
#define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */
|
|
#endif
|
|
int kgdb_sscom_mode = KGDB_DEVMODE;
|
|
|
|
#endif /* NSSCOM */
|
|
|
|
void
|
|
kgdb_port_init(void)
|
|
{
|
|
#if (NSSCOM > 0)
|
|
int unit = -1;
|
|
int pclk = s3c2xx0_softc->sc_pclk;
|
|
|
|
if (strcmp(kgdb_devname, "sscom0") == 0)
|
|
unit = 0;
|
|
else if (strcmp(kgdb_devname, "sscom1") == 0)
|
|
unit = 1;
|
|
|
|
if (unit >= 0) {
|
|
s3c2800_sscom_kgdb_attach(s3c2xx0_softc->sc_iot,
|
|
unit, kgdb_rate, pclk, kgdb_sscom_mode);
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
static __inline
|
|
pd_entry_t *
|
|
read_ttb(void)
|
|
{
|
|
long ttb;
|
|
|
|
__asm __volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb));
|
|
|
|
|
|
return (pd_entry_t *)(ttb & ~((1 << 14) - 1));
|
|
}
|
|
|
|
|
|
static __inline void
|
|
writeback_dcache_line(vaddr_t va)
|
|
{
|
|
/* writeback Dcache line */
|
|
/* we can't use cpu_dcache_wb_range() here, because cpufuncs for ARM9
|
|
* assume write-through cache, and always flush Dcache instead of
|
|
* cleaning it. Since Boot loader maps page table with write-back
|
|
* cached, we really need to clean Dcache. */
|
|
asm("mcr p15, 0, %0, c7, c10, 1"
|
|
: : "r"(va));
|
|
}
|
|
|
|
static __inline void
|
|
clean_dcache_line(vaddr_t va)
|
|
{
|
|
/* writeback and invalidate Dcache line */
|
|
asm("mcr p15, 0, %0, c7, c14, 1"
|
|
: : "r"(va));
|
|
}
|
|
|
|
static vaddr_t section_free = SMDK2800_VBASE_FREE;
|
|
|
|
static void
|
|
map_builtin_peripherals(void)
|
|
{
|
|
pd_entry_t *pagedir = read_ttb();
|
|
int i, sec;
|
|
|
|
for (i=0; i < 2; ++i) {
|
|
|
|
pmap_map_section((vaddr_t)pagedir,
|
|
SMDK2800_IO_AREA_VBASE + (i <<L1_S_SHIFT),
|
|
S3C2800_PERIPHERALS + (i << L1_S_SHIFT),
|
|
VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE);
|
|
|
|
sec = (SMDK2800_IO_AREA_VBASE >> L1_S_SHIFT) + i;
|
|
writeback_dcache_line((vaddr_t)&pagedir[sec]);
|
|
}
|
|
|
|
cpu_drain_writebuf();
|
|
cpu_tlb_flushD();
|
|
}
|
|
|
|
/*
|
|
* simple memory mapping function used in early bootstrap stage
|
|
* before pmap is initialized.
|
|
* This assumes only peripheral registers to map. they are mapped to
|
|
* fixed address with section mapping.
|
|
*/
|
|
static int
|
|
bootstrap_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
|
|
int flag, bus_space_handle_t * bshp)
|
|
{
|
|
long offset;
|
|
int modified = 0;
|
|
pd_entry_t *pagedir = read_ttb();
|
|
/* This assumes PA==VA for page directory */
|
|
|
|
if (S3C2800_PERIPHERALS <= bpa && bpa < S3C2800_PERIPHERALS + 0x200000) {
|
|
offset = bpa - S3C2800_PERIPHERALS;
|
|
if (offset < 0 || 2 * L1_S_SIZE < offset)
|
|
panic("bootstrap_bs_map: can't map");
|
|
*bshp = (bus_space_handle_t)(SMDK2800_IO_AREA_VBASE + offset);
|
|
} else {
|
|
vaddr_t va;
|
|
bus_addr_t pa;
|
|
int cacheable = flag & BUS_SPACE_MAP_CACHEABLE;
|
|
|
|
|
|
size = (size + L1_S_OFFSET) & ~L1_S_OFFSET;
|
|
pa = bpa & ~L1_S_OFFSET;
|
|
offset = bpa - pa;
|
|
|
|
va = section_free;
|
|
while (size) {
|
|
pmap_map_section((vaddr_t)pagedir, va,
|
|
pa, VM_PROT_READ | VM_PROT_WRITE,
|
|
cacheable ? PTE_CACHE : PTE_NOCACHE);
|
|
writeback_dcache_line((vaddr_t)& pagedir[va >> L1_S_SHIFT]);
|
|
va += L1_S_SIZE;
|
|
pa += L1_S_SIZE;
|
|
size -= L1_S_SIZE;
|
|
}
|
|
|
|
*bshp = (bus_space_handle_t)(section_free + offset);
|
|
section_free = va;
|
|
}
|
|
|
|
|
|
if (modified) {
|
|
|
|
cpu_drain_writebuf();
|
|
cpu_tlb_flushD();
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
copy_io_area_map(pd_entry_t * new_pd)
|
|
{
|
|
pd_entry_t *cur_pd = read_ttb();
|
|
int sec;
|
|
|
|
for (sec = SMDK2800_IO_AREA_VBASE >> L1_S_SHIFT;
|
|
sec < (section_free >> L1_S_SHIFT); ++sec) {
|
|
new_pd[sec] = cur_pd[sec];
|
|
}
|
|
}
|