862 lines
27 KiB
C
862 lines
27 KiB
C
/* $NetBSD: osk5912_machdep.c,v 1.16 2016/12/22 14:47:56 cherry Exp $ */
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/*
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* Machine dependent functions for kernel setup for TI OSK5912 board.
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* Based on lubbock_machdep.c which in turn was based on iq80310_machhdep.c
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*
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* Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved.
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* Written by Hiroyuki Bessho for Genetec Corporation.
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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 Genetec Corporation may not be used to endorse or
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* 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 GENETEC CORPORATION ``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 GENETEC CORPORATION
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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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* Copyright (c) 2001 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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* 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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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: osk5912_machdep.c,v 1.16 2016/12/22 14:47:56 cherry Exp $");
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#include "opt_machdep.h"
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#include "opt_ddb.h"
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#include "opt_kgdb.h"
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#include "opt_md.h"
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#include "opt_com.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 <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/cpu.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 <arm/locore.h>
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#include <arm/undefined.h>
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#include <arm/arm32/machdep.h>
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#include <arm/omap/omap_reg.h>
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#include <arm/omap/omap_tipb.h>
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#include <arm/omap/omap_com.h>
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/*
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* The range 0xc1000000 - 0xccffffff is available for kernel VM space.
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*/
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#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
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#define KERNEL_VM_SIZE 0x0C000000
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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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/* Physical address of the beginning of SDRAM. */
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paddr_t physical_start;
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/* Physical address of the first byte after the end of SDRAM. */
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paddr_t physical_end;
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/* Number of pages of memory. */
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/* Same things, but for the free (unused by the kernel) memory. */
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static paddr_t physical_freestart, physical_freeend;
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static u_int free_pages;
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/* Physical address of the message buffer. */
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paddr_t msgbufphys;
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extern char KERNEL_BASE_phys[];
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extern char etext[], __data_start[], _edata[], __bss_start[], __bss_end__[];
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extern char _end[];
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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_KERNEL_NUM 4
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#define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM)
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/* Page tables for mapping kernel VM */
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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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/*
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* Macros to translate between physical and virtual for a subset of the
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* kernel address space. *Not* for general use.
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*/
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#define KERNEL_BASE_PHYS ((paddr_t)&KERNEL_BASE_phys)
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#define KERN_VTOPHYS(va) \
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((paddr_t)((vaddr_t)va - KERNEL_BASE + KERNEL_BASE_PHYS))
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#define KERN_PHYSTOV(pa) \
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((vaddr_t)((paddr_t)pa - KERNEL_BASE_PHYS + KERNEL_BASE))
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/* Prototypes */
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void consinit(void);
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#ifdef KGDB
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static void kgdb_port_init(void);
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#endif
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static void setup_real_page_tables(void);
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static void init_clocks(void);
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bs_protos(bs_notimpl);
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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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/*
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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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pmf_system_shutdown(boothowto);
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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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/* cnpollc(1);*/
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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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pmf_system_shutdown(boothowto);
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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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* Static device mappings. These peripheral registers are mapped at
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* fixed virtual addresses very early in initarm() so that we can use
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* them while booting the kernel, and stay at the same address
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* throughout whole kernel's life time.
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*
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* We use this table twice; once with bootstrap page table, and once
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* with kernel's page table which we build up in initarm().
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*
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* Since we map these registers into the bootstrap page table using
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* pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map
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* registers segment-aligned and segment-rounded in order to avoid
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* using the 2nd page tables.
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*/
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#define _A(a) ((a) & ~L1_S_OFFSET)
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#define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1))
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static const struct pmap_devmap devmap[] = {
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{
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/* Map the Texas Instruments Peripheral Bus VA==PA */
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.pd_va = _A(OMAP_TIPB_PBASE),
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.pd_pa = _A(OMAP_TIPB_PBASE),
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.pd_size = _S(OMAP_TIPB_SIZE),
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.pd_prot = VM_PROT_READ|VM_PROT_WRITE,
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.pd_cache = PTE_NOCACHE
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},
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{0}
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};
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#undef _A
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#undef _S
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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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/*
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* When we enter here, we are using a temporary first level
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* translation table with section entries in it to cover the TIPB
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* peripherals and SDRAM. The temporary first level translation table
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* is at the end of SDRAM.
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*/
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/* Heads up ... Setup the CPU / MMU / TLB functions. */
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if (set_cpufuncs())
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panic("cpu not recognized!");
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init_clocks();
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/* The console is going to try to map things. Give pmap a devmap. */
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pmap_devmap_register(devmap);
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consinit();
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#ifdef KGDB
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kgdb_port_init();
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#endif
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#ifdef VERBOSE_INIT_ARM
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/* Talk to the user */
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printf("\nNetBSD/evbarm (OSK5912) booting ...\n");
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#endif
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#ifdef BOOT_ARGS
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char mi_bootargs[] = BOOT_ARGS;
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parse_mi_bootargs(mi_bootargs);
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#endif
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#ifdef VERBOSE_INIT_ARM
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printf("initarm: Configuring system ...\n");
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#endif
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/*
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* Set up the variables that define the availability of physical
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* memory.
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*/
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physical_start = KERNEL_BASE_PHYS;
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physical_end = physical_start + MEMSIZE_BYTES;
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physmem = MEMSIZE_BYTES / PAGE_SIZE;
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/* Fake bootconfig structure for the benefit of pmap.c. */
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bootconfig.dramblocks = 1;
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bootconfig.dram[0].address = physical_start;
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bootconfig.dram[0].pages = physmem;
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/*
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* Our kernel is at the beginning of memory, so set our free space to
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* all the memory after the kernel.
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*/
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physical_freestart = KERN_VTOPHYS(round_page((vaddr_t) _end));
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physical_freeend = physical_end;
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free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
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/*
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* This is going to do all the hard work of setting up the first and
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* and second level page tables. Pages of memory will be allocated
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* and mapped for other structures that are required for system
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* operation. When it returns, physical_freestart and free_pages will
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* have been updated to reflect the allocations that were made. In
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* addition, kernel_l1pt, kernel_pt_table[], systempage, irqstack,
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* abtstack, undstack, kernelstack, msgbufphys will be set to point to
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* the memory that was allocated for them.
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*/
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setup_real_page_tables();
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/*
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* Moved from cpu_startup() as data_abort_handler() references
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* this during uvm init.
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*/
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uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
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#ifdef VERBOSE_INIT_ARM
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printf("bootstrap done.\n");
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#endif
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arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
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/*
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* Pages were allocated during the secondary bootstrap for the
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* stacks for different CPU modes.
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* We must now set the r13 registers in the different CPU modes to
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* point to these stacks.
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* Since the ARM stacks use STMFD etc. we must set r13 to the top end
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* of the stack memory.
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*/
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#ifdef VERBOSE_INIT_ARM
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printf("init subsystems: stacks ");
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#endif
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set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
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set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
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set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
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/*
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* Well we should set a data abort handler.
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* Once things get going this will change as we will need a proper
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* handler.
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* Until then we will use a handler that just panics but tells us
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* why.
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* Initialisation of the vectors will just panic on a data abort.
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* This just fills in a slightly better one.
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*/
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#ifdef VERBOSE_INIT_ARM
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printf("vectors ");
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#endif
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data_abort_handler_address = (u_int)data_abort_handler;
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prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
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undefined_handler_address = (u_int)undefinedinstruction_bounce;
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/* Initialise the undefined instruction handlers */
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#ifdef VERBOSE_INIT_ARM
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printf("undefined ");
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#endif
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undefined_init();
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/* Load memory into UVM. */
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#ifdef VERBOSE_INIT_ARM
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printf("page ");
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#endif
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uvm_md_init();
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uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
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atop(physical_freestart), atop(physical_freeend),
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VM_FREELIST_DEFAULT);
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/* Boot strap pmap telling it where the kernel page table is */
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#ifdef VERBOSE_INIT_ARM
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printf("pmap ");
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#endif
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pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
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#ifdef VERBOSE_INIT_ARM
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printf("done.\n");
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#endif
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#ifdef KGDB
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if (boothowto & RB_KDB) {
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kgdb_debug_init = 1;
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kgdb_connect(1);
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}
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#endif
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#ifdef DDB
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db_machine_init();
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/* Firmware doesn't load symbols. */
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ddb_init(0, NULL, NULL);
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if (boothowto & RB_KDB)
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Debugger();
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#endif
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/* We return the new stack pointer address */
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return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
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}
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static void
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init_clocks(void)
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{
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#define OMAP_MPU_BASE 0xFFFECE00
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#define ARM_CKCTL 0x00
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#define ARM_TIMXO (1 << 12)
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#define ARM_IDLECT1 0x04
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#define IDLTIM_ARM (1 << 9)
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#define ARM_IDLECT2 0x08
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#define EN_TIMCK (1 << 7)
|
|
|
|
#define OMAP_ULPD_BASE 0xFFFE0800
|
|
#define CAM_CLK_CTRL 0x007C
|
|
#define SYSTEM_CLK_EN (1 << 2)
|
|
|
|
#define SOFT_REQ_REG 0x34
|
|
#define SOFT_UART3_DPLL_REQ 11
|
|
#define SOFT_UART2_DPLL_REQ 10
|
|
#define SOFT_UART1_DPLL_REQ 9
|
|
|
|
#define SOFT_DISABLE_REQ_REG 0x68
|
|
#define DIS_UART3_DPLL_REQ 9
|
|
#define DIS_UART2_DPLL_REQ 8
|
|
#define DIS_UART1_DPLL_REQ 7
|
|
|
|
/* For now, just hack up the clocking as needed to get things working. */
|
|
*(volatile uint32_t *)(OMAP_MPU_BASE + ARM_IDLECT2) |= EN_TIMCK;
|
|
*(volatile uint32_t *)(OMAP_MPU_BASE + ARM_IDLECT1) &= ~IDLTIM_ARM;
|
|
*(volatile uint32_t *)(OMAP_MPU_BASE + ARM_CKCTL) &= ~ARM_TIMXO;
|
|
|
|
|
|
/*
|
|
* Note: The SYSTEM_CLK_EN bit of the CAM_CLK_CTRL register must be set
|
|
* to 1, for GPIO interrupt generation to work.
|
|
*/
|
|
*(volatile uint32_t *)(OMAP_ULPD_BASE + CAM_CLK_CTRL) |= SYSTEM_CLK_EN;
|
|
|
|
/*
|
|
* Issue the software request for the UART clocks. The bootloader probably
|
|
* already did UART1 but might not have done UART3.
|
|
*/
|
|
|
|
*(volatile uint16_t *)(OMAP_ULPD_BASE + SOFT_REQ_REG) |=
|
|
(1 << SOFT_UART1_DPLL_REQ) | (1 << SOFT_UART3_DPLL_REQ);
|
|
*(volatile uint16_t *)(OMAP_ULPD_BASE + SOFT_DISABLE_REQ_REG) &=
|
|
~((1 << DIS_UART1_DPLL_REQ) | (1 << DIS_UART3_DPLL_REQ));
|
|
|
|
}
|
|
|
|
#ifndef CONSADDR
|
|
#error Specify the address of the console UART with the CONSADDR option.
|
|
#endif
|
|
#ifndef CONSPEED
|
|
#define CONSPEED 115200
|
|
#endif
|
|
#ifndef CONMODE
|
|
#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
|
|
#endif
|
|
|
|
static const vaddr_t consaddr = CONSADDR;
|
|
static const int conspeed = CONSPEED;
|
|
static const int conmode = CONMODE;
|
|
|
|
void
|
|
consinit(void)
|
|
{
|
|
static int consinit_called = 0;
|
|
|
|
if (consinit_called != 0)
|
|
return;
|
|
|
|
consinit_called = 1;
|
|
|
|
bus_space_handle_t bh;
|
|
if (bus_space_map(&omap_a4x_bs_tag, consaddr, OMAP_COM_SIZE, 0, &bh))
|
|
panic("Serial console can not be mapped.");
|
|
|
|
/*
|
|
* The TRM says the mode should be disabled while dll and dlh are
|
|
* being changed so we disable before attaching, then enable.
|
|
*/
|
|
bus_space_write_1(&omap_a4x_bs_tag, bh,
|
|
OMAP_COM_MDR1, OMAP_COM_MDR1_MODE_DISABLE);
|
|
|
|
if (comcnattach(&omap_a4x_bs_tag, consaddr, conspeed,
|
|
OMAP_COM_FREQ, COM_TYPE_NORMAL, conmode))
|
|
panic("Serial console can not be initialized.");
|
|
|
|
bus_space_write_1(&omap_a4x_bs_tag, bh,
|
|
OMAP_COM_MDR1, OMAP_COM_MDR1_MODE_UART_16X);
|
|
|
|
bus_space_unmap(&omap_a4x_bs_tag, bh, OMAP_COM_SIZE);
|
|
}
|
|
|
|
#ifdef KGDB
|
|
#ifndef KGDB_DEVADDR
|
|
#error Specify the address of the kgdb UART with the KGDB_DEVADDR option.
|
|
#endif
|
|
#ifndef KGDB_DEVRATE
|
|
#define KGDB_DEVRATE 115200
|
|
#endif
|
|
|
|
#ifndef KGDB_DEVMODE
|
|
#define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
|
|
#endif
|
|
static const vaddr_t comkgdbaddr = KGDB_DEVADDR;
|
|
static const int comkgdbspeed = KGDB_DEVRATE;
|
|
static const int comkgdbmode = KGDB_DEVMODE;
|
|
|
|
void
|
|
static kgdb_port_init(void)
|
|
{
|
|
static int kgdbsinit_called = 0;
|
|
|
|
if (kgdbsinit_called != 0)
|
|
return;
|
|
|
|
kgdbsinit_called = 1;
|
|
|
|
bus_space_handle_t bh;
|
|
if (bus_space_map(&omap_a4x_bs_tag, comkgdbaddr, OMAP_COM_SIZE, 0, &bh))
|
|
panic("kgdb port can not be mapped.");
|
|
|
|
/*
|
|
* The TRM says the mode should be disabled while dll and dlh are
|
|
* being changed so we disable before attaching, then enable.
|
|
*/
|
|
bus_space_write_1(&omap_a4x_bs_tag, bh,
|
|
OMAP_COM_MDR1, OMAP_COM_MDR1_MODE_DISABLE);
|
|
|
|
if (com_kgdb_attach(&omap_a4x_bs_tag, comkgdbaddr, comkgdbspeed,
|
|
OMAP_COM_FREQ, COM_TYPE_NORMAL, comkgdbmode))
|
|
panic("KGDB uart can not be initialized.");
|
|
|
|
bus_space_write_1(&omap_a4x_bs_tag, bh,
|
|
OMAP_COM_MDR1, OMAP_COM_MDR1_MODE_UART_16X);
|
|
|
|
bus_space_unmap(&omap_a4x_bs_tag, bh, OMAP_COM_SIZE);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
setup_real_page_tables(void)
|
|
{
|
|
/*
|
|
* We need to allocate some fixed page tables to get the kernel going.
|
|
*
|
|
* We are going to allocate our bootstrap pages from the beginning of
|
|
* the free space that we just calculated. 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 boundaries. 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
|
|
|
|
/*
|
|
* Define a macro to simplify memory allocation. As we allocate the
|
|
* memory, make sure that we don't walk over our temporary first level
|
|
* translation table.
|
|
*/
|
|
#define valloc_pages(var, np) \
|
|
(var).pv_pa = physical_freestart; \
|
|
physical_freestart += ((np) * PAGE_SIZE); \
|
|
if (physical_freestart > (physical_freeend - L1_TABLE_SIZE)) \
|
|
panic("initarm: out of memory"); \
|
|
free_pages -= (np); \
|
|
(var).pv_va = KERN_PHYSTOV((var).pv_pa); \
|
|
memset((char *)(var).pv_va, 0, ((np) * PAGE_SIZE));
|
|
|
|
int loop, pt_index;
|
|
|
|
pt_index = 0;
|
|
kernel_l1pt.pv_pa = 0;
|
|
kernel_l1pt.pv_va = 0;
|
|
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
|
|
/* Are we 16KB aligned for an L1 ? */
|
|
if ((physical_freestart & (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[pt_index],
|
|
L2_TABLE_SIZE / PAGE_SIZE);
|
|
++pt_index;
|
|
}
|
|
}
|
|
|
|
/* 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");
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
valloc_pages(systempage, 1);
|
|
systempage.pv_va = 0x00000000;
|
|
|
|
/* 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 the message buffer. */
|
|
pv_addr_t msgbuf;
|
|
int msgbuf_pgs = round_page(MSGBUFSIZE) / PAGE_SIZE;
|
|
valloc_pages(msgbuf, msgbuf_pgs);
|
|
msgbufphys = msgbuf.pv_pa;
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
vaddr_t l1_va = kernel_l1pt.pv_va;
|
|
paddr_t l1_pa = kernel_l1pt.pv_pa;
|
|
|
|
/* Map the L2 pages tables in the L1 page table */
|
|
pmap_link_l2pt(l1_va, 0x00000000, &kernel_pt_table[KERNEL_PT_SYS]);
|
|
for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
|
|
pmap_link_l2pt(l1_va, KERNEL_BASE + loop * 0x00400000,
|
|
&kernel_pt_table[KERNEL_PT_KERNEL + loop]);
|
|
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
|
|
pmap_link_l2pt(l1_va, 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 = round_page((uintptr_t) etext - KERNEL_BASE);
|
|
size_t totalsize = round_page((uintptr_t) _end - KERNEL_BASE);
|
|
u_int offset = 0; /* offset of kernel in RAM */
|
|
|
|
/* Map text section read-only. */
|
|
offset += pmap_map_chunk(l1_va, KERNEL_BASE + offset,
|
|
physical_start + offset, textsize,
|
|
VM_PROT_READ, PTE_CACHE);
|
|
/* Map data and bss sections read-write. */
|
|
offset += pmap_map_chunk(l1_va, KERNEL_BASE + offset,
|
|
physical_start + offset, 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(l1_va, irqstack.pv_va, irqstack.pv_pa,
|
|
IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1_va, abtstack.pv_va, abtstack.pv_pa,
|
|
ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1_va, undstack.pv_va, undstack.pv_pa,
|
|
UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1_va, kernelstack.pv_va, kernelstack.pv_pa,
|
|
UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
|
|
|
|
pmap_map_chunk(l1_va, 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(l1_va, 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. */
|
|
pmap_map_entry(l1_va, ARM_VECTORS_LOW, systempage.pv_pa,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
|
|
/*
|
|
* Map integrated peripherals at same address in first level page
|
|
* table so that we can continue to use console.
|
|
*/
|
|
pmap_devmap_bootstrap(l1_va, devmap);
|
|
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
/* Tell the user about where all the bits and pieces live. */
|
|
printf("%22s Physical Virtual Num\n", " ");
|
|
printf("%22s Starting Ending Starting Ending Pages\n", " ");
|
|
|
|
static const char mem_fmt[] =
|
|
"%20s: 0x%08lx 0x%08lx 0x%08lx 0x%08lx %d\n";
|
|
static const char mem_fmt_nov[] =
|
|
"%20s: 0x%08lx 0x%08lx %d\n";
|
|
|
|
printf(mem_fmt, "SDRAM", physical_start, physical_end-1,
|
|
KERN_PHYSTOV(physical_start), KERN_PHYSTOV(physical_end-1),
|
|
physmem);
|
|
printf(mem_fmt, "text section",
|
|
KERN_VTOPHYS(KERNEL_BASE), KERN_VTOPHYS(etext-1),
|
|
(vaddr_t)KERNEL_BASE, (vaddr_t)etext-1,
|
|
(int)(textsize / PAGE_SIZE));
|
|
printf(mem_fmt, "data section",
|
|
KERN_VTOPHYS(__data_start), KERN_VTOPHYS(_edata),
|
|
(vaddr_t)__data_start, (vaddr_t)_edata,
|
|
(int)((round_page((vaddr_t)_edata)
|
|
- trunc_page((vaddr_t)__data_start)) / PAGE_SIZE));
|
|
printf(mem_fmt, "bss section",
|
|
KERN_VTOPHYS(__bss_start), KERN_VTOPHYS(__bss_end__),
|
|
(vaddr_t)__bss_start, (vaddr_t)__bss_end__,
|
|
(int)((round_page((vaddr_t)__bss_end__)
|
|
- trunc_page((vaddr_t)__bss_start)) / PAGE_SIZE));
|
|
printf(mem_fmt, "L1 page directory",
|
|
kernel_l1pt.pv_pa, kernel_l1pt.pv_pa + L1_TABLE_SIZE - 1,
|
|
kernel_l1pt.pv_va, kernel_l1pt.pv_va + L1_TABLE_SIZE - 1,
|
|
L1_TABLE_SIZE / PAGE_SIZE);
|
|
printf(mem_fmt, "Exception Vectors",
|
|
systempage.pv_pa, systempage.pv_pa + PAGE_SIZE - 1,
|
|
(vaddr_t)ARM_VECTORS_LOW, (vaddr_t)ARM_VECTORS_LOW + PAGE_SIZE - 1,
|
|
1);
|
|
printf(mem_fmt, "IRQ stack",
|
|
irqstack.pv_pa, irqstack.pv_pa + (IRQ_STACK_SIZE * PAGE_SIZE) - 1,
|
|
irqstack.pv_va, irqstack.pv_va + (IRQ_STACK_SIZE * PAGE_SIZE) - 1,
|
|
IRQ_STACK_SIZE);
|
|
printf(mem_fmt, "ABT stack",
|
|
abtstack.pv_pa, abtstack.pv_pa + (ABT_STACK_SIZE * PAGE_SIZE) - 1,
|
|
abtstack.pv_va, abtstack.pv_va + (ABT_STACK_SIZE * PAGE_SIZE) - 1,
|
|
ABT_STACK_SIZE);
|
|
printf(mem_fmt, "UND stack",
|
|
undstack.pv_pa, undstack.pv_pa + (UND_STACK_SIZE * PAGE_SIZE) - 1,
|
|
undstack.pv_va, undstack.pv_va + (UND_STACK_SIZE * PAGE_SIZE) - 1,
|
|
UND_STACK_SIZE);
|
|
printf(mem_fmt, "SVC stack",
|
|
kernelstack.pv_pa, kernelstack.pv_pa + (UPAGES * PAGE_SIZE) - 1,
|
|
kernelstack.pv_va, kernelstack.pv_va + (UPAGES * PAGE_SIZE) - 1,
|
|
UPAGES);
|
|
printf(mem_fmt_nov, "Message Buffer",
|
|
msgbufphys, msgbufphys + msgbuf_pgs * PAGE_SIZE - 1, msgbuf_pgs);
|
|
printf(mem_fmt, "Free Memory", physical_freestart, physical_freeend-1,
|
|
KERN_PHYSTOV(physical_freestart), KERN_PHYSTOV(physical_freeend-1),
|
|
free_pages);
|
|
#endif
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
/* Switch tables */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("switching to new L1 page table @%#lx...", l1_pa);
|
|
#endif
|
|
|
|
cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
|
|
cpu_setttb(l1_pa, true);
|
|
cpu_tlb_flushID();
|
|
cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
|
|
|
|
}
|