924 lines
26 KiB
C
924 lines
26 KiB
C
/* $NetBSD: integrator_machdep.c,v 1.22 2002/04/12 06:13:42 thorpej Exp $ */
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/*
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* Copyright (c) 2001 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 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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* 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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#include "opt_ddb.h"
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#include "opt_pmap_debug.h"
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#include <sys/param.h>
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#include <sys/device.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/exec.h>
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#include <sys/proc.h>
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#include <sys/msgbuf.h>
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#include <sys/reboot.h>
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#include <sys/termios.h>
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#include <dev/cons.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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#include <machine/bootconfig.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/frame.h>
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#include <machine/intr.h>
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#include <evbarm/ifpga/irqhandler.h> /* XXX XXX XXX */
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#include <arm/undefined.h>
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#include <evbarm/integrator/integrator_boot.h>
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#include "opt_ipkdb.h"
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#include "pci.h"
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void ifpga_reset(void) __attribute__((noreturn));
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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) ifpga_reset;
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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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struct intbootinfo intbootinfo;
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BootConfig bootconfig; /* Boot config storage */
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static char bootargs[MAX_BOOT_STRING + 1];
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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 /* 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_VMDATA 2 /* 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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struct user *proc0paddr;
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/* Prototypes */
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void consinit __P((void));
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void process_kernel_args __P((char *));
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void data_abort_handler __P((trapframe_t *frame));
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void prefetch_abort_handler __P((trapframe_t *frame));
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void undefinedinstruction_bounce __P((trapframe_t *frame));
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extern void configure __P((void));
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extern void parse_mi_bootargs __P((char *args));
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extern void dumpsys __P((void));
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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 "pckbc.h"
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#if (NPCKBC > 0)
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#include <dev/ic/i8042reg.h>
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#include <dev/ic/pckbcvar.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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#ifndef CONCOMADDR
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#define CONCOMADDR 0x3f8
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#endif
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#endif
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#define CONSPEED B115200
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#ifndef CONSPEED
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#define CONSPEED B9600 /* 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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#include "plcom.h"
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#if (NPLCOM > 0)
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#include <evbarm/dev/plcomreg.h>
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#include <evbarm/dev/plcomvar.h>
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#include <evbarm/ifpga/ifpgamem.h>
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#include <evbarm/ifpga/ifpgareg.h>
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#include <evbarm/ifpga/ifpgavar.h>
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#endif
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#ifndef CONSDEVNAME
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#define CONSDEVNAME "plcom"
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#endif
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#ifndef PLCONSPEED
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#define PLCONSPEED B38400
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#endif
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#ifndef PLCONMODE
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#define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
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#endif
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#ifndef PLCOMCNUNIT
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#define PLCOMCNUNIT -1
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#endif
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int plcomcnspeed = PLCONSPEED;
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int plcomcnmode = PLCONMODE;
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#if 0
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extern struct consdev kcomcons;
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static void kcomcnputc(dev_t, int);
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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(howto, bootstr)
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int howto;
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char *bootstr;
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{
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#ifdef DIAGNOSTIC
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/* info */
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printf("boot: howto=%08x curproc=%p\n", howto, curproc);
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#endif
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/*
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* If we are still cold then hit the air brakes
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* and crash to earth fast
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*/
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if (cold) {
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doshutdownhooks();
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printf("The operating system has halted.\n");
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printf("Please press any key to reboot.\n\n");
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cngetc();
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printf("rebooting...\n");
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ifpga_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 unmount.
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* It looks like syslogd is getting woken up only to find that it cannot
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* page part of the binary in as the filesystem has 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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ifpga_reset();
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/*NOTREACHED*/
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}
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/*
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* Mapping table for core kernel memory. This memory is mapped at init
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* time with section mappings.
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*/
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struct l1_sec_map {
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vm_offset_t va;
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vm_offset_t pa;
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vm_size_t size;
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vm_prot_t prot;
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int cache;
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} l1_sec_table[] = {
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#if NPLCOM > 0 && defined(PLCONSOLE)
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{ UART0_BOOT_BASE, IFPGA_IO_BASE + IFPGA_UART0, 1024 * 1024,
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VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE },
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{ UART1_BOOT_BASE, IFPGA_IO_BASE + IFPGA_UART1, 1024 * 1024,
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VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE },
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#endif
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#if NPCI > 0
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{ IFPGA_PCI_IO_VBASE, IFPGA_PCI_IO_BASE, IFPGA_PCI_IO_VSIZE,
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VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE },
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{ IFPGA_PCI_CONF_VBASE, IFPGA_PCI_CONF_BASE, IFPGA_PCI_CONF_VSIZE,
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VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE },
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#endif
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{ 0, 0, 0, 0, 0 }
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};
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/*
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* u_int initarm(struct ebsaboot *bootinfo)
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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(bootinfo)
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struct intbootinfo *bootinfo;
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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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pv_addr_t kernel_ptpt;
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#if NPLCOM > 0 && defined(PLCONSOLE)
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static struct bus_space plcom_bus_space;
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#endif
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#if 0
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cn_tab = &kcomcons;
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#endif
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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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/* - intbootinfo.bt_memstart) / NBPG */;
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#if NPLCOM > 0 && defined(PLCONSOLE)
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/*
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* Initialise the diagnostic serial console
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* This allows a means of generating output during initarm().
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* Once all the memory map changes are complete we can call consinit()
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* and not have to worry about things moving.
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*/
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if (PLCOMCNUNIT == 0) {
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ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000);
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plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
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IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT);
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} else if (PLCOMCNUNIT == 1) {
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ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000);
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plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
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IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT);
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}
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#endif
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/* Talk to the user */
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printf("\nNetBSD/integrator booting ...\n");
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#if 0
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if (intbootinfo.bt_magic != BT_MAGIC_NUMBER_EBSA
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&& intbootinfo.bt_magic != BT_MAGIC_NUMBER_CATS)
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panic("Incompatible magic number passed in boot args\n");
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#endif
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/* {
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int loop;
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for (loop = 0; loop < 8; ++loop) {
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printf("%08x\n", *(((int *)bootinfo)+loop));
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}
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}*/
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/*
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* Ok we have the following memory map
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*
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* virtual address == physical address apart from the areas:
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* 0x00000000 -> 0x000fffff which is mapped to
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* top 1MB of physical memory
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* 0x00100000 -> 0x0fffffff which is mapped to
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* physical addresses 0x00100000 -> 0x0fffffff
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* 0x10000000 -> 0x1fffffff which is mapped to
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* physical addresses 0x00000000 -> 0x0fffffff
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* 0x20000000 -> 0xefffffff which is mapped to
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* physical addresses 0x20000000 -> 0xefffffff
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* 0xf0000000 -> 0xf03fffff which is mapped to
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* physical addresses 0x00000000 -> 0x003fffff
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*
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* This means that the kernel is mapped suitably for continuing
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* execution, all I/O is mapped 1:1 virtual to physical and
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* physical memory is accessible.
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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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/*
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* Examine the boot args string for options we need to know about
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* now.
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*/
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#if 0
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process_kernel_args((char *)intbootinfo.bt_args);
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#endif
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printf("initarm: Configuring system ...\n");
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/*
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* Set up the variables that define the availablilty of
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* physical memory
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*/
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physical_start = 0 /*intbootinfo.bt_memstart*/;
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physical_freestart = physical_start;
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#if 0
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physical_end = /*intbootinfo.bt_memend*/ /*intbootinfo.bi_nrpages * NBPG */ 32*1024*1024;
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#else
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{
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volatile unsigned long *cm_sdram
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= (volatile unsigned long *)0x10000020;
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switch ((*cm_sdram >> 2) & 0x7)
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{
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case 0:
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physical_end = 16 * 1024 * 1024;
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break;
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case 1:
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physical_end = 32 * 1024 * 1024;
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break;
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case 2:
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physical_end = 64 * 1024 * 1024;
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break;
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case 3:
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physical_end = 128 * 1024 * 1024;
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break;
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case 4:
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physical_end = 256 * 1024 * 1024;
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break;
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default:
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printf("CM_SDRAM retuns unknown value, using 16M\n");
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physical_end = 16 * 1024 * 1024;
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break;
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}
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}
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#endif
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physical_freeend = physical_end;
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free_pages = (physical_end - physical_start) / NBPG;
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/* Set up the 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 = free_pages;
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physmem = (physical_end - physical_start) / NBPG;
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/* Tell the user about the memory */
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printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
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physical_start, physical_end - 1);
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/*
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* Ok the kernel occupies the bottom of physical memory.
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* The first free page after the kernel can be found in
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* intbootinfo->bt_memavail
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* We now need to allocate some fixed page tables to get the kernel
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* going.
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* We allocate one page directory and a number page tables and store
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* the physical addresses in the kernel_pt_table array.
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*
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* Ok the next bit of physical allocation may look complex but it is
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* simple really. I have done it like this so that no memory gets
|
|
* wasted during the allocation of various pages and tables that are
|
|
* all different sizes.
|
|
* The start addresses will be page aligned.
|
|
* We allocate the kernel page directory on the first free 16KB boundry
|
|
* we find.
|
|
* We allocate the kernel page tables on the first 4KB boundry we find.
|
|
* Since we allocate at least 3 L2 pagetables we know that we must
|
|
* encounter at least one 16KB aligned address.
|
|
*/
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Allocating page tables\n");
|
|
#endif
|
|
|
|
/* Update the address of the first free 16KB chunk of physical memory */
|
|
physical_freestart = ((uintptr_t) &end - KERNEL_TEXT_BASE + PGOFSET)
|
|
& ~PGOFSET;
|
|
#if 0
|
|
physical_freestart += (kernexec->a_syms + sizeof(int)
|
|
+ *(u_int *)((int)end + kernexec->a_syms + sizeof(int))
|
|
+ (NBPG - 1)) & ~(NBPG - 1);
|
|
#endif
|
|
|
|
free_pages -= (physical_freestart - physical_start) / NBPG;
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("freestart = %#lx, free_pages = %d (%#x)\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_TEXT_BASE + (var).pv_pa - physical_start;
|
|
|
|
#define alloc_pages(var, np) \
|
|
(var) = physical_freestart; \
|
|
physical_freestart += ((np) * NBPG); \
|
|
free_pages -= (np); \
|
|
memset((char *)(var), 0, ((np) * NBPG));
|
|
|
|
loop1 = 0;
|
|
kernel_l1pt.pv_pa = 0;
|
|
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
|
|
/* Are we 16KB aligned for an L1 ? */
|
|
if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0
|
|
&& kernel_l1pt.pv_pa == 0) {
|
|
valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG);
|
|
} else {
|
|
alloc_pages(kernel_pt_table[loop1].pv_pa,
|
|
L2_TABLE_SIZE / NBPG);
|
|
++loop1;
|
|
kernel_pt_table[loop1].pv_va =
|
|
kernel_pt_table[loop1].pv_pa;
|
|
}
|
|
}
|
|
|
|
/* 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 a page for the page table to map kernel page tables*/
|
|
valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG);
|
|
|
|
/* Allocate stacks for all modes */
|
|
valloc_pages(irqstack, IRQ_STACK_SIZE);
|
|
valloc_pages(abtstack, ABT_STACK_SIZE);
|
|
valloc_pages(undstack, UND_STACK_SIZE);
|
|
valloc_pages(kernelstack, UPAGES);
|
|
|
|
#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) / NBPG);
|
|
|
|
/*
|
|
* Ok we have allocated physical pages for the primary kernel
|
|
* page tables
|
|
*/
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Creating L1 page table at %#lx\n", kernel_l1pt.pv_pa);
|
|
#endif
|
|
|
|
/*
|
|
* Now we start consturction of the L1 page table
|
|
* We start by mapping the L2 page tables into the L1.
|
|
* This means that we can replace L1 mappings later on if necessary
|
|
*/
|
|
l1pagetable = kernel_l1pt.pv_pa;
|
|
|
|
/* Map the L2 pages tables in the L1 page table */
|
|
pmap_link_l2pt(l1pagetable, 0x00000000,
|
|
&kernel_pt_table[KERNEL_PT_SYS]);
|
|
pmap_link_l2pt(l1pagetable, KERNEL_BASE,
|
|
&kernel_pt_table[KERNEL_PT_KERNEL]);
|
|
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]);
|
|
pmap_link_l2pt(l1pagetable, PTE_BASE,
|
|
&kernel_ptpt);
|
|
|
|
/* 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 */
|
|
|
|
{
|
|
u_int logical;
|
|
size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE;
|
|
size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE;
|
|
|
|
/* Round down text size and round up total size
|
|
*/
|
|
textsize = textsize & ~PGOFSET;
|
|
totalsize = (totalsize + PGOFSET) & ~PGOFSET;
|
|
/* logical = pmap_map_chunk(l1pagetable,
|
|
KERNEL_BASE, physical_start, KERNEL_TEXT_BASE - KERNEL_BASE,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); */
|
|
logical = pmap_map_chunk(l1pagetable,
|
|
KERNEL_TEXT_BASE, physical_start, textsize,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
logical += pmap_map_chunk(l1pagetable,
|
|
KERNEL_TEXT_BASE + logical, physical_start + logical,
|
|
totalsize - textsize, VM_PROT_READ|VM_PROT_WRITE,
|
|
PTE_CACHE);
|
|
#if 0
|
|
logical += pmap_map_chunk(l1pagetable,
|
|
KERNEL_BASE + logical,
|
|
physical_start + logical, kernexec->a_syms + sizeof(int)
|
|
+ *(u_int *)((int)end + kernexec->a_syms + sizeof(int)),
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
#endif
|
|
}
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Constructing L2 page tables\n");
|
|
#endif
|
|
|
|
/* Map the boot arguments page */
|
|
#if 0
|
|
pmap_map_entry(l1pagetable, intbootinfo.bt_vargp,
|
|
intbootinfo.bt_pargp, VM_PROT_READ, PTE_CACHE);
|
|
#endif
|
|
|
|
/* Map the stack pages */
|
|
pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
|
|
IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
|
|
ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
|
|
UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
|
|
UPAGES * NBPG, 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_NOCACHE);
|
|
|
|
/* Map the page table that maps the kernel pages */
|
|
pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
|
|
|
|
/*
|
|
* Map entries in the page table used to map PTE's
|
|
* Basically every kernel page table gets mapped here
|
|
*/
|
|
/* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */
|
|
pmap_map_entry(l1pagetable,
|
|
PTE_BASE + (KERNEL_BASE >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_KERNEL].pv_pa,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
|
|
pmap_map_entry(l1pagetable,
|
|
PTE_BASE + (PTE_BASE >> (PGSHIFT-2)),
|
|
kernel_ptpt.pv_pa,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
|
|
pmap_map_entry(l1pagetable,
|
|
PTE_BASE + (0x00000000 >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_SYS].pv_pa,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
|
|
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
|
|
pmap_map_entry(l1pagetable,
|
|
PTE_BASE + ((KERNEL_VM_BASE +
|
|
(loop * 0x00400000)) >> (PGSHIFT-2)),
|
|
kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
|
|
|
|
/* 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
|
|
/* Map the core memory needed before autoconfig */
|
|
loop = 0;
|
|
while (l1_sec_table[loop].size) {
|
|
vm_size_t sz;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa,
|
|
l1_sec_table[loop].pa + l1_sec_table[loop].size - 1,
|
|
l1_sec_table[loop].va);
|
|
#endif
|
|
for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE)
|
|
pmap_map_section(l1pagetable,
|
|
l1_sec_table[loop].va + sz,
|
|
l1_sec_table[loop].pa + sz,
|
|
l1_sec_table[loop].prot,
|
|
l1_sec_table[loop].cache);
|
|
++loop;
|
|
}
|
|
|
|
/*
|
|
* 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("freestart = %#lx, free_pages = %d (%#x)\n",
|
|
physical_freestart, free_pages, free_pages);
|
|
printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
|
|
#endif
|
|
|
|
setttb(kernel_l1pt.pv_pa);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("done!\n");
|
|
#endif
|
|
|
|
#ifdef PLCONSOLE
|
|
/*
|
|
* The IFPGA registers have just moved.
|
|
* Detach the diagnostic serial port and reattach at the new address.
|
|
*/
|
|
plcomcndetach();
|
|
#endif
|
|
|
|
/*
|
|
* XXX this should only be done in main() but it useful to
|
|
* have output earlier ...
|
|
*/
|
|
consinit();
|
|
|
|
#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.
|
|
*/
|
|
printf("init subsystems: stacks ");
|
|
|
|
set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG);
|
|
set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG);
|
|
set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG);
|
|
|
|
/*
|
|
* Well we should set a data abort handler.
|
|
* Once things get going this will change as we will need a proper handler.
|
|
* Until then we will use a handler that just panics but tells us
|
|
* why.
|
|
* Initialisation of the vectors will just panic on a data abort.
|
|
* This just fills in a slighly better one.
|
|
*/
|
|
printf("vectors ");
|
|
data_abort_handler_address = (u_int)data_abort_handler;
|
|
prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
|
|
undefined_handler_address = (u_int)undefinedinstruction_bounce;
|
|
|
|
/* At last !
|
|
* We now have the kernel in physical memory from the bottom upwards.
|
|
* Kernel page tables are physically above this.
|
|
* The kernel is mapped to KERNEL_TEXT_BASE
|
|
* The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff
|
|
* The page tables are mapped to 0xefc00000
|
|
*/
|
|
|
|
/* Initialise the undefined instruction handlers */
|
|
printf("undefined ");
|
|
undefined_init();
|
|
|
|
/* Boot strap pmap telling it where the kernel page table is */
|
|
printf("pmap ");
|
|
pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt);
|
|
|
|
/* Setup the IRQ system */
|
|
printf("irq ");
|
|
irq_init();
|
|
|
|
printf("done.\n");
|
|
|
|
#ifdef IPKDB
|
|
/* Initialise ipkdb */
|
|
ipkdb_init();
|
|
if (boothowto & RB_KDB)
|
|
ipkdb_connect(0);
|
|
#endif
|
|
|
|
#ifdef DDB
|
|
db_machine_init();
|
|
|
|
/* Firmware doesn't load symbols. */
|
|
ddb_init(0, NULL, NULL);
|
|
|
|
if (boothowto & RB_KDB)
|
|
Debugger();
|
|
#endif
|
|
|
|
/* We return the new stack pointer address */
|
|
return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
|
|
}
|
|
|
|
void
|
|
process_kernel_args(args)
|
|
char *args;
|
|
{
|
|
|
|
boothowto = 0;
|
|
|
|
/* Make a local copy of the bootargs */
|
|
strncpy(bootargs, args, MAX_BOOT_STRING);
|
|
|
|
args = bootargs;
|
|
boot_file = bootargs;
|
|
|
|
/* Skip the kernel image filename */
|
|
while (*args != ' ' && *args != 0)
|
|
++args;
|
|
|
|
if (*args != 0)
|
|
*args++ = 0;
|
|
|
|
while (*args == ' ')
|
|
++args;
|
|
|
|
boot_args = args;
|
|
|
|
printf("bootfile: %s\n", boot_file);
|
|
printf("bootargs: %s\n", boot_args);
|
|
|
|
parse_mi_bootargs(boot_args);
|
|
}
|
|
|
|
void
|
|
consinit(void)
|
|
{
|
|
static int consinit_called = 0;
|
|
#if NPLCOM > 0 && defined(PLCONSOLE)
|
|
static struct bus_space plcom_bus_space;
|
|
#endif
|
|
#if 0
|
|
char *console = CONSDEVNAME;
|
|
#endif
|
|
|
|
if (consinit_called != 0)
|
|
return;
|
|
|
|
consinit_called = 1;
|
|
|
|
#if NPLCOM > 0 && defined(PLCONSOLE)
|
|
if (PLCOMCNUNIT == 0) {
|
|
ifpga_create_io_bs_tag(&plcom_bus_space,
|
|
(void*)UART0_BOOT_BASE);
|
|
if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
|
|
IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT))
|
|
panic("can't init serial console");
|
|
return;
|
|
} else if (PLCOMCNUNIT == 1) {
|
|
ifpga_create_io_bs_tag(&plcom_bus_space,
|
|
(void*)UART0_BOOT_BASE);
|
|
if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed,
|
|
IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT))
|
|
panic("can't init serial console");
|
|
return;
|
|
}
|
|
#endif
|
|
#if (NCOM > 0)
|
|
if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed,
|
|
COM_FREQ, comcnmode))
|
|
panic("can't init serial console @%x", CONCOMADDR);
|
|
return;
|
|
#endif
|
|
panic("No serial console configured");
|
|
}
|