Initial commit of board support for DEC/Intel EBSA285 architecture
systems include the Chalice CATS board and others running the cyclone firmware.
This commit is contained in:
mark
parent
0823f75d49
commit
71150c9734
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/* $NetBSD: cyclone_boot.h,v 1.1 1998/09/06 02:23:36 mark Exp $ */
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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
|
||||
* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* 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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* 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
|
||||
* 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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* Define the boot structure that is passed to the kernel
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* from the cyclone firmware.
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*
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* The bootloader reserves a page for boot argument info.
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* This page will contain the ebsaboot structure and the
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* kernel argument string.
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*/
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struct ebsaboot {
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u_int32_t bt_magic; /* boot info magic number */
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u_int32_t bt_vargp; /* virtual addr of arg page */
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u_int32_t bt_pargp; /* physical addr of arg page */
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const char * bt_args; /* kernel args string pointer */
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pd_entry_t * bt_l1; /* active L1 page table */
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u_int32_t bt_memstart; /* start of physical memory */
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u_int32_t bt_memend; /* end of physical memory */
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u_int32_t bt_memavail; /* start of avail phys memory */
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u_int32_t bt_fclk; /* fclk frequency */
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};
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#define BT_MAGIC_NUMBER 0x45425341
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/* End of cyclone_boot.h */
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/* $NetBSD: ebsa285_machdep.c,v 1.1 1998/09/06 02:23:36 mark Exp $ */
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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
|
||||
* are met:
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||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* 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 EBSA285 core architecture
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* using cyclone firmware
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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/systm.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 <vm/vm_kern.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/irqhandler.h>
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#include <machine/pte.h>
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#include <machine/undefined.h>
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#include <arm32/footbridge/cyclone_boot.h>
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#include <arm32/footbridge/dc21285mem.h>
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#include <arm32/footbridge/dc21285reg.h>
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#include "ipkdb.h"
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#define VERBOSE_INIT_ARM
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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 = DC21285_ROM_BASE;
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u_int dc21285_fclk = FCLK;
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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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#if NIPKDB > 0
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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 ebsaboot ebsabootinfo;
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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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int physical_memoryblock;
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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 (KERNEL_VM_SIZE >> (PDSHIFT + 2))
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#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
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pt_entry_t kernel_pt_table[NUM_KERNEL_PTS];
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struct user *proc0paddr;
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/* Prototypes */
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void consinit __P((void));
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void map_section __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa,
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int cacheable));
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void map_pagetable __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
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void map_entry __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
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void map_entry_nc __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
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void map_entry_ro __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa));
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vm_size_t map_chunk __P((vm_offset_t pd, vm_offset_t pt, vm_offset_t va,
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vm_offset_t pa, vm_size_t size, u_int acc,
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u_int flg));
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void pmap_bootstrap __P((vm_offset_t kernel_l1pt,
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pv_addr_t kernel_ptpt));
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void process_kernel_args __P((char *));
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caddr_t allocsys __P((caddr_t v));
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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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void zero_page_readonly __P((void));
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void zero_page_readwrite __P((void));
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extern void configure __P((void));
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extern pt_entry_t *pmap_pte __P((pmap_t pmap, vm_offset_t va));
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extern void db_machine_init __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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void kick_console __P((u_int, u_int));
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extern int cold;
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#define CONSPEED B38400
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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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extern bus_space_handle_t fcomconsioh;
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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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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 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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cpu_reset();
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/*NOTREACHED*/
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}
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/*
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* Mapping table for core kernel memory. This memory is mapped at init
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* time with section mappings.
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*/
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struct l1_sec_map {
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vm_offset_t va;
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vm_offset_t pa;
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vm_size_t size;
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int flags;
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} l1_sec_table[] = {
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/* Map 1MB for CSR space */
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{ DC21285_ARMCSR_VBASE, DC21285_ARMCSR_BASE,
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DC21285_ARMCSR_VSIZE, 0 },
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/* Map 1MB for fast cache cleaning space */
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{ DC21285_CACHE_FLUSH_VBASE, DC28285_SA_CACHE_FLUSH_BASE,
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DC21285_CACHE_FLUSH_VSIZE, 1 },
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/* Map 1MB for PCI IO space */
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{ DC21285_PCI_IO_VBASE, DC21285_PCI_IO_BASE,
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DC21285_PCI_IO_VSIZE, 0 },
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/* Map 1MB for PCI IACK space */
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{ DC21285_PCI_IACK_VBASE, DC21285_PCI_IACK_SPECIAL,
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DC21285_PCI_IACK_VSIZE, 0 },
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/* Map 16MB of type 1 PCI config access */
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{ DC21285_PCI_TYPE_1_CONFIG_VBASE, DC21285_PCI_TYPE_1_CONFIG,
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DC21285_PCI_TYPE_1_CONFIG_VSIZE, 0 },
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/* Map 16MB of type 0 PCI config access */
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{ DC21285_PCI_TYPE_0_CONFIG_VBASE, DC21285_PCI_TYPE_0_CONFIG,
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DC21285_PCI_TYPE_0_CONFIG_VSIZE, 0 },
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/* Map 128MB of 32 bit PCI address space for MEM accesses */
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{ DC21285_PCI_MEM_VBASE, DC21285_PCI_MEM_BASE,
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DC21285_PCI_MEM_VSIZE, 0 },
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/* { , , , },*/
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{ 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 responcible 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 ebsaboot *bootinfo;
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{
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int loop;
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int loop1;
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u_int logical;
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u_int l1pagetable;
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u_int l2pagetable;
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extern char page0[], page0_end[];
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struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE;
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pv_addr_t kernel_l1pt;
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pv_addr_t kernel_ptpt;
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/*
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* Heads up ... Setup the CPU / MMU / TLB functions
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*/
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set_cpufuncs();
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/* Copy the boot configuration structure */
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ebsabootinfo = *bootinfo;
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if (ebsabootinfo.bt_fclk >= 50000000
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&& ebsabootinfo.bt_fclk <= 66000000)
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dc21285_fclk = ebsabootinfo.bt_fclk;
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/* Fake bootconfig structure for the benefit of pmap.c */
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/* XXX must make the memory description h/w independant */
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bootconfig.dramblocks = 1;
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bootconfig.dram[0].address = ebsabootinfo.bt_memstart;
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bootconfig.dram[0].pages = (ebsabootinfo.bt_memend
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- ebsabootinfo.bt_memstart) / NBPG;
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/*
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* Initialise the physical console
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* This is done in main() but for the moment we do it here so that
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* we can use printf in initarm() before main() has been called.
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*/
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consinit();
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/* Talk to the user */
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printf("NetBSD/arm32 booting ...\n");
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if (ebsabootinfo.bt_magic != BT_MAGIC_NUMBER)
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panic("Incompatible magic number passed in boot args\n");
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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 accessable.
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*
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* The initarm() has the responcibility 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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process_kernel_args((char *)ebsabootinfo.bt_args);
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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 = ebsabootinfo.bt_memstart;
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physical_freestart = physical_start;
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physical_end = ebsabootinfo.bt_memend;
|
||||
physical_freeend = physical_end;
|
||||
physical_memoryblock = 0;
|
||||
free_pages = (physical_end - physical_start) / NBPG;
|
||||
|
||||
physmem = (physical_end - physical_start) / NBPG;
|
||||
|
||||
/* Tell the user about the memory */
|
||||
printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
|
||||
physical_start, physical_end - 1);
|
||||
|
||||
/*
|
||||
* Ok the kernel occupies the bottom of physical memory.
|
||||
* The first free page after the kernel can be found in
|
||||
* ebsabootinfo->bt_memavail
|
||||
* We now need to allocate some fixed page tables to get the kernel
|
||||
* going.
|
||||
* We allocate one page directory and a number page tables and store
|
||||
* the physical addresses in the kernel_pt_table array.
|
||||
*
|
||||
* Ok the next bit of physical allocation may look complex but it is
|
||||
* 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 page of physical memory */
|
||||
physical_freestart = ebsabootinfo.bt_memavail;
|
||||
free_pages -= (physical_freestart - physical_start) / NBPG;
|
||||
|
||||
/* Define a macro to simplify memory allocation */
|
||||
#define valloc_pages(var, np) \
|
||||
alloc_pages((var).physical, (np)); \
|
||||
(var).virtual = KERNEL_BASE + (var).physical - physical_start;
|
||||
|
||||
#define alloc_pages(var, np) \
|
||||
(var) = physical_freestart; \
|
||||
physical_freestart += ((np) * NBPG); \
|
||||
free_pages -= (np); \
|
||||
bzero((char *)(var), ((np) * NBPG));
|
||||
|
||||
loop1 = 0;
|
||||
kernel_l1pt.physical = 0;
|
||||
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
|
||||
/* Are we 16KB aligned for an L1 ? */
|
||||
if ((physical_freestart & (PD_SIZE - 1)) == 0
|
||||
&& kernel_l1pt.physical == 0) {
|
||||
valloc_pages(kernel_l1pt, PD_SIZE / NBPG);
|
||||
} else {
|
||||
alloc_pages(kernel_pt_table[loop1], PT_SIZE / NBPG);
|
||||
++loop1;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef DIAGNOSTIC
|
||||
/* This should never be able to happen but better confirm that. */
|
||||
if (!kernel_l1pt.physical || (kernel_l1pt.physical & (PD_SIZE-1)) != 0)
|
||||
panic("initarm: Failed to align the kernel page directory\n");
|
||||
#endif
|
||||
|
||||
/*
|
||||
* 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.physical, 1);
|
||||
|
||||
/* Allocate a page for the page table to map kernel page tables*/
|
||||
valloc_pages(kernel_ptpt, PT_SIZE / NBPG);
|
||||
|
||||
/* Allocate stacks for all modes */
|
||||
valloc_pages(irqstack, IRQ_STACK_SIZE);
|
||||
valloc_pages(abtstack, ABT_STACK_SIZE);
|
||||
valloc_pages(undstack, UND_STACK_SIZE);
|
||||
valloc_pages(kernelstack, UPAGES);
|
||||
|
||||
#ifdef VERBOSE_INIT_ARM
|
||||
printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.physical, irqstack.virtual);
|
||||
printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.physical, abtstack.virtual);
|
||||
printf("UND stack: p0x%08lx v0x%08lx\n", undstack.physical, undstack.virtual);
|
||||
printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.physical, kernelstack.virtual);
|
||||
#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\n");
|
||||
#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.physical;
|
||||
|
||||
/* Map the L2 pages tables in the L1 page table */
|
||||
map_pagetable(l1pagetable, 0x00000000,
|
||||
kernel_pt_table[KERNEL_PT_SYS]);
|
||||
map_pagetable(l1pagetable, KERNEL_BASE,
|
||||
kernel_pt_table[KERNEL_PT_KERNEL]);
|
||||
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
|
||||
map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
|
||||
kernel_pt_table[KERNEL_PT_VMDATA + loop]);
|
||||
map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE,
|
||||
kernel_ptpt.physical);
|
||||
|
||||
#ifdef VERBOSE_INIT_ARM
|
||||
printf("Mapping kernel\n");
|
||||
#endif
|
||||
|
||||
/* Now we fill in the L2 pagetable for the kernel static code/data */
|
||||
l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL];
|
||||
|
||||
if (N_GETMAGIC(kernexec[0]) != ZMAGIC)
|
||||
panic("Illegal kernel format\n");
|
||||
else {
|
||||
extern int end;
|
||||
|
||||
logical = map_chunk(0, l2pagetable, KERNEL_TEXT_BASE,
|
||||
physical_start, kernexec->a_text,
|
||||
AP_KR, PT_CACHEABLE);
|
||||
logical += map_chunk(0, l2pagetable, KERNEL_TEXT_BASE + logical,
|
||||
physical_start + logical, kernexec->a_data,
|
||||
AP_KRW, PT_CACHEABLE);
|
||||
logical += map_chunk(0, l2pagetable, KERNEL_TEXT_BASE + logical,
|
||||
physical_start + logical, kernexec->a_bss,
|
||||
AP_KRW, PT_CACHEABLE);
|
||||
logical += map_chunk(0, l2pagetable, KERNEL_TEXT_BASE + logical,
|
||||
physical_start + logical, kernexec->a_syms + sizeof(int)
|
||||
+ *(u_int *)((int)&end + kernexec->a_syms + sizeof(int)),
|
||||
AP_KRW, PT_CACHEABLE);
|
||||
}
|
||||
|
||||
/*
|
||||
* PATCH PATCH ...
|
||||
*
|
||||
* Fixup the first word of the kernel to be the instruction
|
||||
* add pc, pc, #0x41000000
|
||||
*
|
||||
* This traps the case where the CPU core resets due to bus contention
|
||||
* on a prototype CATS system and will reboot into the firmware.
|
||||
*/
|
||||
*((u_int *)KERNEL_TEXT_BASE) = 0xe28ff441;
|
||||
|
||||
#ifdef VERBOSE_INIT_ARM
|
||||
printf("Constructing L2 page tables\n");
|
||||
#endif
|
||||
|
||||
/* Map the boot arguments page */
|
||||
map_entry_ro(l2pagetable, ebsabootinfo.bt_vargp, ebsabootinfo.bt_pargp);
|
||||
|
||||
/* Map the stack pages */
|
||||
map_chunk(0, l2pagetable, irqstack.virtual, irqstack.physical,
|
||||
IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
||||
map_chunk(0, l2pagetable, abtstack.virtual, abtstack.physical,
|
||||
ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
||||
map_chunk(0, l2pagetable, undstack.virtual, undstack.physical,
|
||||
UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE);
|
||||
map_chunk(0, l2pagetable, kernelstack.virtual, kernelstack.physical,
|
||||
UPAGES * NBPG, AP_KRW, PT_CACHEABLE);
|
||||
map_chunk(0, l2pagetable, kernel_l1pt.virtual, kernel_l1pt.physical,
|
||||
PD_SIZE, AP_KRW, 0);
|
||||
|
||||
/* Map the page table that maps the kernel pages */
|
||||
map_entry_nc(l2pagetable, kernel_ptpt.physical, kernel_ptpt.physical);
|
||||
|
||||
/*
|
||||
* Map entries in the page table used to map PTE's
|
||||
* Basically every kernel page table gets mapped here
|
||||
*/
|
||||
/* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */
|
||||
l2pagetable = kernel_ptpt.physical;
|
||||
map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)),
|
||||
kernel_pt_table[KERNEL_PT_KERNEL]);
|
||||
map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)),
|
||||
kernel_ptpt.physical);
|
||||
map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)),
|
||||
kernel_pt_table[KERNEL_PT_SYS]);
|
||||
for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
|
||||
map_entry_nc(l2pagetable, ((KERNEL_VM_BASE +
|
||||
(loop * 0x00400000)) >> (PGSHIFT-2)),
|
||||
kernel_pt_table[KERNEL_PT_VMDATA + loop]);
|
||||
|
||||
/*
|
||||
* Map the system page in the kernel page table for the bottom 1Meg
|
||||
* of the virtual memory map.
|
||||
*/
|
||||
l2pagetable = kernel_pt_table[KERNEL_PT_SYS];
|
||||
map_entry(l2pagetable, 0x00000000, systempage.physical);
|
||||
|
||||
/* 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_SEC_SIZE)
|
||||
map_section(l1pagetable, l1_sec_table[loop].va + sz,
|
||||
l1_sec_table[loop].pa + sz,
|
||||
l1_sec_table[loop].flags);
|
||||
++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("switching to new L1 page table\n");
|
||||
#endif
|
||||
|
||||
setttb(kernel_l1pt.physical);
|
||||
|
||||
fcomconsioh = DC21285_ARMCSR_VBASE;
|
||||
kick_console(DC21285_PCI_IO_VBASE, DC21285_PCI_MEM_VBASE);
|
||||
|
||||
#ifdef VERBOSE_INIT_ARM
|
||||
printf("bootstrap done.\n");
|
||||
#endif
|
||||
|
||||
/* Right set up the vectors at the bottom of page 0 */
|
||||
bcopy(page0, (char *)0x00000000, page0_end - page0);
|
||||
|
||||
/* We have modified a text page so sync the icache */
|
||||
cpu_cache_syncI();
|
||||
|
||||
/*
|
||||
* Pages were allocated during the secondary bootstrap for the
|
||||
* stacks for different CPU modes.
|
||||
* We must now set the r13 registers in the different CPU modes to
|
||||
* point to these stacks.
|
||||
* Since the ARM stacks use STMFD etc. we must set r13 to the top end
|
||||
* of the stack memory.
|
||||
*/
|
||||
printf("init subsystems: stacks ");
|
||||
|
||||
set_stackptr(PSR_IRQ32_MODE, irqstack.virtual + IRQ_STACK_SIZE * NBPG);
|
||||
set_stackptr(PSR_ABT32_MODE, abtstack.virtual + ABT_STACK_SIZE * NBPG);
|
||||
set_stackptr(PSR_UND32_MODE, undstack.virtual + 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(kernel_l1pt.virtual, kernel_ptpt);
|
||||
|
||||
/* Setup the IRQ system */
|
||||
printf("irq ");
|
||||
irq_init();
|
||||
printf("done.\n");
|
||||
|
||||
#if NIPKDB > 0
|
||||
/* Initialise ipkdb */
|
||||
ipkdb_init();
|
||||
if (boothowto & RB_KDB)
|
||||
ipkdb_connect(0);
|
||||
#endif
|
||||
|
||||
#ifdef DDB
|
||||
printf("ddb: ");
|
||||
db_machine_init();
|
||||
{
|
||||
extern int end;
|
||||
extern int *esym;
|
||||
|
||||
ddb_init(*(int *)&end, ((int *)&end) + 1, esym);
|
||||
}
|
||||
|
||||
if (boothowto & RB_KDB)
|
||||
Debugger();
|
||||
#endif
|
||||
|
||||
/* We return the new stack pointer address */
|
||||
return(kernelstack.virtual + 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);
|
||||
}
|
||||
|
||||
#if 0
|
||||
void
|
||||
arm32_cachectl(va, len, flags)
|
||||
vm_offset_t va;
|
||||
int len;
|
||||
int flags;
|
||||
{
|
||||
pt_entry_t *ptep, pte;
|
||||
int loop;
|
||||
vm_offset_t addr;
|
||||
|
||||
/* printf("arm32_cachectl(%x,%x,%x)\n", va, len, flags);*/
|
||||
|
||||
if (flags & 1) {
|
||||
addr = va;
|
||||
loop = len;
|
||||
while (loop > 0) {
|
||||
ptep = vtopte(addr & (~PGOFSET));
|
||||
pte = *ptep;
|
||||
|
||||
*ptep = (pte & ~(PT_C | PT_B)) | (flags & (PT_C | PT_B));
|
||||
|
||||
loop -= NBPG;
|
||||
addr += NBPG;
|
||||
}
|
||||
tlb_flush();
|
||||
}
|
||||
|
||||
cpu_cache_purgeD_rng(va, len);
|
||||
}
|
||||
#endif
|
||||
|
||||
void
|
||||
kick_console(iobase, membase)
|
||||
u_int iobase, membase;
|
||||
{
|
||||
}
|
||||
|
||||
/* End of ebsa285_machdep.c */
|
||||
Loading…
Reference in New Issue