418 lines
14 KiB
C
418 lines
14 KiB
C
/* $NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc Exp $ */
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/*-
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* Copyright (c) 1994-1998 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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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 Brini.
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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 BRINI ``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 BRINI 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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* RiscBSD kernel project
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*
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* machdep.c
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*
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* Machine dependent functions for kernel setup
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*
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* This file needs a lot of work.
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*
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* Created : 17/09/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_kstack_pages.h"
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#define _ARM32_BUS_DMA_PRIVATE
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/signalvar.h>
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#include <sys/imgact.h>
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#include <sys/kernel.h>
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#include <sys/ktr.h>
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#include <sys/linker.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/pcpu.h>
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#include <sys/proc.h>
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#include <sys/ptrace.h>
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#include <sys/cons.h>
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#include <sys/bio.h>
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#include <sys/bus.h>
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#include <sys/buf.h>
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#include <sys/exec.h>
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#include <sys/kdb.h>
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#include <sys/msgbuf.h>
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#include <sys/devmap.h>
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#include <machine/physmem.h>
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#include <machine/reg.h>
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#include <machine/cpu.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_object.h>
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#include <vm/vm_page.h>
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#include <vm/vm_map.h>
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#include <machine/vmparam.h>
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#include <machine/pcb.h>
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#include <machine/undefined.h>
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#include <machine/machdep.h>
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#include <machine/metadata.h>
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#include <machine/armreg.h>
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#include <machine/bus.h>
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#include <sys/reboot.h>
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#include <arm/xscale/ixp425/ixp425reg.h>
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#include <arm/xscale/ixp425/ixp425var.h>
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#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
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#define KERNEL_PT_IO 1
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#define KERNEL_PT_IO_NUM 3
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#define KERNEL_PT_BEFOREKERN KERNEL_PT_IO + KERNEL_PT_IO_NUM
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#define KERNEL_PT_AFKERNEL KERNEL_PT_BEFOREKERN + 1 /* L2 table for mapping after kernel */
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#define KERNEL_PT_AFKERNEL_NUM 9
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/* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
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#define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
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struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
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/* Physical and virtual addresses for some global pages */
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struct pv_addr systempage;
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struct pv_addr msgbufpv;
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struct pv_addr irqstack;
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struct pv_addr undstack;
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struct pv_addr abtstack;
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struct pv_addr kernelstack;
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struct pv_addr minidataclean;
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/* Static device mappings. */
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static const struct devmap_entry ixp425_devmap[] = {
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/* Physical/Virtual address for I/O space */
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{ IXP425_IO_VBASE, IXP425_IO_HWBASE, IXP425_IO_SIZE, },
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/* Expansion Bus */
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{ IXP425_EXP_VBASE, IXP425_EXP_HWBASE, IXP425_EXP_SIZE, },
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/* CFI Flash on the Expansion Bus */
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{ IXP425_EXP_BUS_CS0_VBASE, IXP425_EXP_BUS_CS0_HWBASE,
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IXP425_EXP_BUS_CS0_SIZE, },
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/* IXP425 PCI Configuration */
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{ IXP425_PCI_VBASE, IXP425_PCI_HWBASE, IXP425_PCI_SIZE, },
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/* SDRAM Controller */
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{ IXP425_MCU_VBASE, IXP425_MCU_HWBASE, IXP425_MCU_SIZE, },
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/* PCI Memory Space */
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{ IXP425_PCI_MEM_VBASE, IXP425_PCI_MEM_HWBASE, IXP425_PCI_MEM_SIZE, },
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/* Q-Mgr Memory Space */
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{ IXP425_QMGR_VBASE, IXP425_QMGR_HWBASE, IXP425_QMGR_SIZE, },
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{ 0 },
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};
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/* Static device mappings. */
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static const struct devmap_entry ixp435_devmap[] = {
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/* Physical/Virtual address for I/O space */
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{ IXP425_IO_VBASE, IXP425_IO_HWBASE, IXP425_IO_SIZE, },
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{ IXP425_EXP_VBASE, IXP425_EXP_HWBASE, IXP425_EXP_SIZE, },
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/* IXP425 PCI Configuration */
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{ IXP425_PCI_VBASE, IXP425_PCI_HWBASE, IXP425_PCI_SIZE, },
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/* DDRII Controller NB: mapped same place as IXP425 */
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{ IXP425_MCU_VBASE, IXP435_MCU_HWBASE, IXP425_MCU_SIZE, },
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/* PCI Memory Space */
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{ IXP425_PCI_MEM_VBASE, IXP425_PCI_MEM_HWBASE, IXP425_PCI_MEM_SIZE, },
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/* Q-Mgr Memory Space */
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{ IXP425_QMGR_VBASE, IXP425_QMGR_HWBASE, IXP425_QMGR_SIZE, },
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/* CFI Flash on the Expansion Bus */
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{ IXP425_EXP_BUS_CS0_VBASE, IXP425_EXP_BUS_CS0_HWBASE,
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IXP425_EXP_BUS_CS0_SIZE, },
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/* USB1 Memory Space */
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{ IXP435_USB1_VBASE, IXP435_USB1_HWBASE, IXP435_USB1_SIZE, },
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/* USB2 Memory Space */
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{ IXP435_USB2_VBASE, IXP435_USB2_HWBASE, IXP435_USB2_SIZE, },
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/* GPS Memory Space */
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{ CAMBRIA_GPS_VBASE, CAMBRIA_GPS_HWBASE, CAMBRIA_GPS_SIZE, },
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/* RS485 Memory Space */
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{ CAMBRIA_RS485_VBASE, CAMBRIA_RS485_HWBASE, CAMBRIA_RS485_SIZE, },
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{ 0 }
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};
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extern vm_offset_t xscale_cache_clean_addr;
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void *
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initarm(struct arm_boot_params *abp)
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{
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#define next_chunk2(a,b) (((a) + (b)) &~ ((b)-1))
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#define next_page(a) next_chunk2(a,PAGE_SIZE)
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struct pv_addr kernel_l1pt;
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struct pv_addr dpcpu;
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int loop, i;
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u_int l1pagetable;
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vm_offset_t freemempos;
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vm_offset_t freemem_pt;
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vm_offset_t afterkern;
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vm_offset_t freemem_after;
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vm_offset_t lastaddr;
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uint32_t memsize;
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/* kernel text starts where we were loaded at boot */
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#define KERNEL_TEXT_OFF (abp->abp_physaddr - PHYSADDR)
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#define KERNEL_TEXT_BASE (KERNBASE + KERNEL_TEXT_OFF)
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#define KERNEL_TEXT_PHYS (PHYSADDR + KERNEL_TEXT_OFF)
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lastaddr = parse_boot_param(abp);
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arm_physmem_kernaddr = abp->abp_physaddr;
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set_cpufuncs(); /* NB: sets cputype */
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pcpu_init(pcpup, 0, sizeof(struct pcpu));
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PCPU_SET(curthread, &thread0);
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init_static_kenv(NULL, 0);
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/* Do basic tuning, hz etc */
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init_param1();
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/*
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* We allocate memory downwards from where we were loaded
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* by RedBoot; first the L1 page table, then NUM_KERNEL_PTS
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* entries in the L2 page table. Past that we re-align the
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* allocation boundary so later data structures (stacks, etc)
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* can be mapped with different attributes (write-back vs
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* write-through). Note this leaves a gap for expansion
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* (or might be repurposed).
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*/
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freemempos = abp->abp_physaddr;
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/* macros to simplify initial memory allocation */
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#define alloc_pages(var, np) do { \
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freemempos -= (np * PAGE_SIZE); \
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(var) = freemempos; \
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/* NB: this works because locore maps PA=VA */ \
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memset((char *)(var), 0, ((np) * PAGE_SIZE)); \
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} while (0)
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#define valloc_pages(var, np) do { \
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alloc_pages((var).pv_pa, (np)); \
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(var).pv_va = (var).pv_pa + (KERNVIRTADDR - abp->abp_physaddr); \
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} while (0)
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/* force L1 page table alignment */
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while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
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freemempos -= PAGE_SIZE;
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/* allocate contiguous L1 page table */
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valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
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/* now allocate L2 page tables; they are linked to L1 below */
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for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
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if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
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valloc_pages(kernel_pt_table[loop],
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L2_TABLE_SIZE / PAGE_SIZE);
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} else {
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kernel_pt_table[loop].pv_pa = freemempos +
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(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
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L2_TABLE_SIZE_REAL;
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kernel_pt_table[loop].pv_va =
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kernel_pt_table[loop].pv_pa +
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(KERNVIRTADDR - abp->abp_physaddr);
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}
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}
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freemem_pt = freemempos; /* base of allocated pt's */
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/*
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* Re-align allocation boundary so we can map the area
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* write-back instead of write-through for the stacks and
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* related structures allocated below.
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*/
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freemempos = PHYSADDR + 0x100000;
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/*
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* Allocate a page for the system page mapped to V0x00000000
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* This page will just contain the system vectors and can be
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* shared by all processes.
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*/
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valloc_pages(systempage, 1);
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/* Allocate dynamic per-cpu area. */
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valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
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dpcpu_init((void *)dpcpu.pv_va, 0);
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/* Allocate stacks for all modes */
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valloc_pages(irqstack, IRQ_STACK_SIZE);
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valloc_pages(abtstack, ABT_STACK_SIZE);
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valloc_pages(undstack, UND_STACK_SIZE);
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valloc_pages(kernelstack, kstack_pages);
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alloc_pages(minidataclean.pv_pa, 1);
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valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
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/*
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* Now construct the L1 page table. First map the L2
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* page tables into the L1 so we can replace L1 mappings
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* later on if necessary
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*/
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l1pagetable = kernel_l1pt.pv_va;
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/* Map the L2 pages tables in the L1 page table */
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pmap_link_l2pt(l1pagetable, rounddown2(ARM_VECTORS_HIGH, 0x00100000),
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&kernel_pt_table[KERNEL_PT_SYS]);
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pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
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&kernel_pt_table[KERNEL_PT_IO]);
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pmap_link_l2pt(l1pagetable, IXP425_MCU_VBASE,
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&kernel_pt_table[KERNEL_PT_IO + 1]);
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pmap_link_l2pt(l1pagetable, IXP425_PCI_MEM_VBASE,
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&kernel_pt_table[KERNEL_PT_IO + 2]);
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pmap_link_l2pt(l1pagetable, KERNBASE,
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&kernel_pt_table[KERNEL_PT_BEFOREKERN]);
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pmap_map_chunk(l1pagetable, KERNBASE, PHYSADDR, 0x100000,
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VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
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pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, PHYSADDR + 0x100000,
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0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
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pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, KERNEL_TEXT_PHYS,
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next_chunk2(((uint32_t)lastaddr) - KERNEL_TEXT_BASE, L1_S_SIZE),
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VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
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freemem_after = next_page((int)lastaddr);
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afterkern = round_page(next_chunk2((vm_offset_t)lastaddr, L1_S_SIZE));
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for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
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pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
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&kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
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}
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pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa,
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VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
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/* Map the Mini-Data cache clean area. */
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xscale_setup_minidata(l1pagetable, afterkern,
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minidataclean.pv_pa);
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/* Map the vector page. */
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pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
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VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
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if (cpu_is_ixp43x())
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devmap_bootstrap(l1pagetable, ixp435_devmap);
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else
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devmap_bootstrap(l1pagetable, ixp425_devmap);
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/*
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* Give the XScale global cache clean code an appropriately
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* sized chunk of unmapped VA space starting at 0xff000000
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* (our device mappings end before this address).
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*/
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xscale_cache_clean_addr = 0xff000000U;
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cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
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cpu_setttb(kernel_l1pt.pv_pa);
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cpu_tlb_flushID();
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cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
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/*
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* Pages were allocated during the secondary bootstrap for the
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* stacks for different CPU modes.
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* We must now set the r13 registers in the different CPU modes to
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* point to these stacks.
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* Since the ARM stacks use STMFD etc. we must set r13 to the top end
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* of the stack memory.
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*/
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set_stackptrs(0);
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/*
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* We must now clean the cache again....
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* Cleaning may be done by reading new data to displace any
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* dirty data in the cache. This will have happened in cpu_setttb()
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* but since we are boot strapping the addresses used for the read
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* may have just been remapped and thus the cache could be out
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* of sync. A re-clean after the switch will cure this.
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* After booting there are no gross relocations of the kernel thus
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* this problem will not occur after initarm().
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*/
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cpu_idcache_wbinv_all();
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cpu_setup();
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/* ready to setup the console (XXX move earlier if possible) */
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cninit();
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/*
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* Fetch the RAM size from the MCU registers. The
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* expansion bus was mapped above so we can now read 'em.
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*/
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if (cpu_is_ixp43x())
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memsize = ixp435_ddram_size();
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else
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memsize = ixp425_sdram_size();
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undefined_init();
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init_proc0(kernelstack.pv_va);
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arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
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pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
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vm_max_kernel_address = 0xe0000000;
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pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt);
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msgbufp = (void*)msgbufpv.pv_va;
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msgbufinit(msgbufp, msgbufsize);
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mutex_init();
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/*
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* Add the physical ram we have available.
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*
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* Exclude the kernel, and all the things we allocated which immediately
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* follow the kernel, from the VM allocation pool but not from crash
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* dumps. virtual_avail is a global variable which tracks the kva we've
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* "allocated" while setting up pmaps.
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*
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* Prepare the list of physical memory available to the vm subsystem.
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*/
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arm_physmem_hardware_region(PHYSADDR, memsize);
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arm_physmem_exclude_region(freemem_pt, abp->abp_physaddr -
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freemem_pt, EXFLAG_NOALLOC);
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arm_physmem_exclude_region(freemempos, abp->abp_physaddr - 0x100000 -
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freemempos, EXFLAG_NOALLOC);
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arm_physmem_exclude_region(abp->abp_physaddr,
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virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC);
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arm_physmem_init_kernel_globals();
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init_param2(physmem);
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kdb_init();
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return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
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sizeof(struct pcb)));
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#undef next_page
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#undef next_chunk2
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}
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