1007 lines
29 KiB
C
1007 lines
29 KiB
C
/* $NetBSD: eb7500atx_machdep.c,v 1.21 2011/07/19 15:59:52 dyoung Exp $ */
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/*
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* Copyright (c) 2000-2002 Reinoud Zandijk.
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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 still needs a lot of work
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*
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* Created : 17/09/94
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* Updated for yet another new bootloader 28/12/02
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*/
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#include "opt_ddb.h"
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#include "opt_modular.h"
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#include "opt_pmap_debug.h"
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#include "vidcvideo.h"
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#include "pckbc.h"
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#include <sys/param.h>
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__KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.21 2011/07/19 15:59:52 dyoung Exp $");
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <sys/proc.h>
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#include <sys/msgbuf.h>
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#include <sys/exec.h>
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#include <sys/exec_aout.h>
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#include <sys/ksyms.h>
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#include <sys/bus.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 <uvm/uvm.h>
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#include <machine/signal.h>
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#include <machine/frame.h>
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#include <machine/bootconfig.h>
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#include <machine/cpu.h>
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#include <machine/io.h>
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#include <machine/intr.h>
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#include <arm/cpuconf.h>
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#include <arm/arm32/katelib.h>
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#include <arm/arm32/machdep.h>
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#include <arm/undefined.h>
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#include <machine/rtc.h>
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#include <arm/iomd/vidc.h>
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#include <arm/iomd/iomdreg.h>
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#include <arm/iomd/iomdvar.h>
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#include <arm/iomd/vidcvideo.h>
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#include <sys/device.h>
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#include <dev/ic/pckbcvar.h>
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#include <dev/i2c/i2cvar.h>
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#include <dev/i2c/pcf8583var.h>
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#include <arm/iomd/iomdiicvar.h>
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/* static i2c_tag_t acorn32_i2c_tag;*/
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#include "ksyms.h"
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/* Kernel text starts at the base of the kernel address space. */
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#define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000)
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#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
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/*
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* The range 0xf1000000 - 0xf5ffffff is available for kernel VM space
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* Fixed mappings exist from 0xf6000000 - 0xffffffff
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*/
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#define KERNEL_VM_SIZE 0x05000000
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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 dependent 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 = 0x0; /* XXX 0x3800000 too for rev0 RiscPC 600 */
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#define VERBOSE_INIT_ARM
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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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#define UND_STACK_SIZE 1
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struct bootconfig bootconfig; /* Boot config storage */
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videomemory_t videomemory; /* Video memory descriptor */
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char *boot_args = NULL; /* holds the pre-processed boot arguments */
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extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */
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extern int *vidc_base;
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extern u_int32_t iomd_base;
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extern struct bus_space iomd_bs_tag;
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paddr_t physical_start;
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paddr_t physical_freestart;
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paddr_t physical_freeend;
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paddr_t physical_end;
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paddr_t dma_range_begin;
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paddr_t dma_range_end;
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u_int free_pages;
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paddr_t memoryblock_end;
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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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u_int videodram_size = 0; /* Amount of DRAM to reserve for video */
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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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paddr_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 /* PMAP_DEBUG */
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#define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */
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#define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */
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#define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */
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#define KERNEL_PT_VMDATA 3 /* 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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#ifdef CPU_SA110
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#define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2)
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static vaddr_t sa110_cc_base;
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#endif /* CPU_SA110 */
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/* Prototypes */
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void physcon_display_base(u_int);
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extern void consinit(void);
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void data_abort_handler(trapframe_t *);
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void prefetch_abort_handler(trapframe_t *);
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void undefinedinstruction_bounce(trapframe_t *frame);
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static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *);
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static void process_kernel_args(void);
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extern void dump_spl_masks(void);
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void rpc_sa110_cc_setup(void);
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void parse_rpc_bootargs(char *args);
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extern void dumpsys(void);
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# define console_flush() /* empty */
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#define panic2(a) do { \
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memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \
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consinit(); \
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panic a; \
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} while (/* CONSTCOND */ 0)
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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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/* NOTE: These variables will be removed, well some of them */
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extern u_int current_mask;
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void
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cpu_reboot(int howto, char *bootstr)
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{
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#ifdef DIAGNOSTIC
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printf("boot: howto=%08x curlwp=%p\n", howto, curlwp);
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printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n",
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irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY],
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irqmasks[IPL_VM]);
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printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n",
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irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]);
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/* dump_spl_masks(); */
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#endif /* DIAGNOSTIC */
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/*
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* If we are still cold then hit the air brakes
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* and crash to earth fast
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*/
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if (cold) {
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doshutdownhooks();
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pmf_system_shutdown(boothowto);
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printf("Halted while still in the ICE age.\n");
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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
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* the unmount. It looks like syslogd is getting woken up
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* only to find that it cannot page part of the binary in as
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* 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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/*
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* Auto reboot overload protection
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*
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* This code stops the kernel entering an endless loop of reboot
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* - panic cycles. This will have the effect of stopping further
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* reboots after it has rebooted 8 times after panics. A clean
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* halt or reboot will reset the counter.
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*/
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/* Run any shutdown hooks */
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doshutdownhooks();
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pmf_system_shutdown(boothowto);
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/* Make sure IRQ's are disabled */
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IRQdisable;
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if (howto & RB_HALT) {
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printf("The operating system has halted.\n");
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printf("Please press any key to reboot.\n\n");
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cngetc();
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}
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printf("rebooting...\n");
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cpu_reset();
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/*NOTREACHED*/
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}
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/*
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* u_int initarm(BootConfig *bootconf)
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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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/*
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* this part is completely rewritten for the new bootloader ... It features
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* a flat memory map with a mapping comparable to the EBSA arm32 machine
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* to boost the portability and likeness of the code
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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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* XXX One big assumption in the current architecture seems that the kernel is
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* XXX supposed to be mapped into bootconfig.dram[0].
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*/
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#define ONE_MB 0x100000
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struct l1_sec_map {
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vaddr_t va;
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paddr_t pa;
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vsize_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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/* Map 1Mb section for VIDC20 */
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{ VIDC_BASE, VIDC_HW_BASE,
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ONE_MB, VM_PROT_READ|VM_PROT_WRITE,
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PTE_NOCACHE },
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/* Map 1Mb section from IOMD */
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{ IOMD_BASE, IOMD_HW_BASE,
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ONE_MB, VM_PROT_READ|VM_PROT_WRITE,
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PTE_NOCACHE },
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/* Map 1Mb of COMBO (and module space) */
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{ IO_BASE, IO_HW_BASE,
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ONE_MB, VM_PROT_READ|VM_PROT_WRITE,
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PTE_NOCACHE },
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{ 0, 0, 0, 0, 0 }
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};
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static void
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canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf)
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{
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/* check for bootconfig v2+ structure */
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if (raw_bootconf->magic == BOOTCONFIG_MAGIC) {
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/* v2+ cleaned up structure found */
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*bootconf = *raw_bootconf;
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return;
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} else {
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panic2(("Internal error: no valid bootconfig block found"));
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}
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}
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u_int
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initarm(void *cookie)
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{
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struct bootconfig *raw_bootconf = cookie;
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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 kerneldatasize;
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u_int l1pagetable;
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struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE;
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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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/* canonicalise the boot configuration structure to alow versioning */
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canonicalise_bootconfig(&bootconfig, raw_bootconf);
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booted_kernel = bootconfig.kernelname;
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/* if the wscons interface is used, switch off VERBOSE booting :( */
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#if NVIDCVIDEO>0
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# undef VERBOSE_INIT_ARM
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# undef PMAP_DEBUG
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#endif
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/*
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* Initialise the video memory descriptor
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*
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* Note: all references to the video memory virtual/physical address
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* should go via this structure.
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*/
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/* Hardwire it on the place the bootloader tells us */
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videomemory.vidm_vbase = bootconfig.display_start;
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videomemory.vidm_pbase = bootconfig.display_phys;
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videomemory.vidm_size = bootconfig.display_size;
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if (bootconfig.vram[0].pages)
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videomemory.vidm_type = VIDEOMEM_TYPE_VRAM;
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else
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videomemory.vidm_type = VIDEOMEM_TYPE_DRAM;
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vidc_base = (int *) VIDC_HW_BASE;
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iomd_base = IOMD_HW_BASE;
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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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* only for `vidcconsole!' ... not wscons
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*/
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#if NVIDCVIDEO == 0
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consinit();
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#endif
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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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/* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */
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/* XXX snif .... i am still not able to this */
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/*
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* We have the following memory map (derived from EBSA)
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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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* 0xf0000000 -> 0xf0ffffff wich is mapped to
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* physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0])
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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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/* START OF REAL NEW STUFF */
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/* Check to make sure the page size is correct */
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if (PAGE_SIZE != bootconfig.pagesize)
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panic2(("Page size is %d bytes instead of %d !! (huh?)\n",
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bootconfig.pagesize, PAGE_SIZE));
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/* process arguments */
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process_kernel_args();
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/*
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* Now set up the page tables for the kernel ... this part is copied
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* in a (modified?) way from the EBSA machine port....
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*/
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#ifdef VERBOSE_INIT_ARM
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printf("Allocating page tables\n");
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#endif
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/*
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* Set up the variables that define the availablilty of physical
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* memory
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*/
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physical_start = 0xffffffff;
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physical_end = 0;
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for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) {
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if (bootconfig.dram[loop].address < physical_start)
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physical_start = bootconfig.dram[loop].address;
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memoryblock_end = bootconfig.dram[loop].address +
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bootconfig.dram[loop].pages * PAGE_SIZE;
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if (memoryblock_end > physical_end)
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physical_end = memoryblock_end;
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physmem += bootconfig.dram[loop].pages;
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};
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/* constants for now, but might be changed/configured */
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dma_range_begin = (paddr_t) physical_start;
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dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024);
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/* XXX HACK HACK XXX */
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/* dma_range_end = 0x18000000; */
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if (physical_start != bootconfig.dram[0].address) {
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int oldblocks = 0;
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/*
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* must be a kinetic, as it's the only thing to shuffle memory
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* around
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*/
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/* hack hack - throw away the slow dram */
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for (loop = 0; loop < bootconfig.dramblocks; ++loop) {
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if (bootconfig.dram[loop].address <
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bootconfig.dram[0].address) {
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/* non kinetic ram */
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bootconfig.dram[loop].address = 0;
|
|
physmem -= bootconfig.dram[loop].pages;
|
|
bootconfig.drampages -=
|
|
bootconfig.dram[loop].pages;
|
|
bootconfig.dram[loop].pages = 0;
|
|
oldblocks++;
|
|
}
|
|
}
|
|
physical_start = bootconfig.dram[0].address;
|
|
bootconfig.dramblocks -= oldblocks;
|
|
}
|
|
|
|
physical_freestart = physical_start;
|
|
free_pages = bootconfig.drampages;
|
|
physical_freeend = physical_end;
|
|
|
|
|
|
/*
|
|
* AHUM !! set this variable ... it was set up in the old 1st
|
|
* stage bootloader
|
|
*/
|
|
kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize;
|
|
|
|
/* Update the address of the first free page of physical memory */
|
|
/* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */
|
|
physical_freestart +=
|
|
bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize;
|
|
free_pages -= (physical_freestart - physical_start) / PAGE_SIZE;
|
|
|
|
/* Define a macro to simplify memory allocation */
|
|
#define valloc_pages(var, np) \
|
|
alloc_pages((var).pv_pa, (np)); \
|
|
(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
|
|
|
|
#define alloc_pages(var, np) \
|
|
(var) = physical_freestart; \
|
|
physical_freestart += ((np) * PAGE_SIZE); \
|
|
free_pages -= (np); \
|
|
memset((char *)(var), 0, ((np) * PAGE_SIZE));
|
|
|
|
loop1 = 0;
|
|
kernel_l1pt.pv_pa = 0;
|
|
for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
|
|
/* Are we 16KB aligned for an L1 ? */
|
|
if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0
|
|
&& kernel_l1pt.pv_pa == 0) {
|
|
valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
|
|
} else {
|
|
valloc_pages(kernel_pt_table[loop1],
|
|
L2_TABLE_SIZE / PAGE_SIZE);
|
|
++loop1;
|
|
}
|
|
}
|
|
|
|
|
|
#ifdef DIAGNOSTIC
|
|
/* 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)
|
|
panic2(("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.pv_pa, 1);
|
|
|
|
/* Allocate stacks for all modes */
|
|
valloc_pages(irqstack, IRQ_STACK_SIZE);
|
|
valloc_pages(abtstack, ABT_STACK_SIZE);
|
|
valloc_pages(undstack, UND_STACK_SIZE);
|
|
valloc_pages(kernelstack, UPAGES);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Setting up stacks :\n");
|
|
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);
|
|
printf("\n");
|
|
#endif
|
|
|
|
alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
|
|
|
|
#ifdef CPU_SA110
|
|
/*
|
|
* XXX totally stuffed hack to work round problems introduced
|
|
* in recent versions of the pmap code. Due to the calls used there
|
|
* we cannot allocate virtual memory during bootstrap.
|
|
*/
|
|
sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start)
|
|
+ (CPU_SA110_CACHE_CLEAN_SIZE - 1))
|
|
& ~(CPU_SA110_CACHE_CLEAN_SIZE - 1);
|
|
#endif /* CPU_SA110 */
|
|
|
|
/*
|
|
* 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 construction of the L1 page table
|
|
* We start by mapping the L2 page tables into the L1.
|
|
* This means that we can replace L1 mappings later on if necessary
|
|
*/
|
|
l1pagetable = kernel_l1pt.pv_pa;
|
|
|
|
/* Map the L2 pages tables in the L1 page table */
|
|
pmap_link_l2pt(l1pagetable, 0x00000000,
|
|
&kernel_pt_table[KERNEL_PT_SYS]);
|
|
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, VMEM_VBASE,
|
|
&kernel_pt_table[KERNEL_PT_VMEM]);
|
|
|
|
/* 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 code/data */
|
|
/* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */
|
|
/*
|
|
* The defines are a workaround for a recent problem that occurred
|
|
* with ARM 610 processors and some ARM 710 processors
|
|
* Other ARM 710 and StrongARM processors don't have a problem.
|
|
*/
|
|
if (N_GETMAGIC(kernexec[0]) == ZMAGIC) {
|
|
#if defined(CPU_ARM6) || defined(CPU_ARM7)
|
|
logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
|
|
physical_start, kernexec->a_text,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
#else /* CPU_ARM6 || CPU_ARM7 */
|
|
logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
|
|
physical_start, kernexec->a_text,
|
|
VM_PROT_READ, PTE_CACHE);
|
|
#endif /* CPU_ARM6 || CPU_ARM7 */
|
|
logical += pmap_map_chunk(l1pagetable,
|
|
KERNEL_TEXT_BASE + logical, physical_start + logical,
|
|
kerneldatasize - kernexec->a_text,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
} else { /* !ZMAGIC */
|
|
/*
|
|
* Most likely an ELF kernel ...
|
|
* XXX no distinction yet between read only and
|
|
* read/write area's ...
|
|
*/
|
|
pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
|
|
physical_start, kerneldatasize,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
};
|
|
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("Constructing L2 page tables\n");
|
|
#endif
|
|
|
|
/* Map the stack pages */
|
|
pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
|
|
IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
|
|
ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
|
|
UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
|
|
UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
|
|
pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
|
|
L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
|
|
|
|
for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
|
|
pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
|
|
kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
|
|
}
|
|
|
|
/* Now we fill in the L2 pagetable for the VRAM */
|
|
/*
|
|
* Current architectures mean that the VRAM is always in 1
|
|
* continuous bank. This means that we can just map the 2 meg
|
|
* that the VRAM would occupy. In theory we don't need a page
|
|
* table for VRAM, we could section map it but we would need
|
|
* the page tables if DRAM was in use.
|
|
* XXX please map two adjacent virtual areas to ONE physical
|
|
* area
|
|
*/
|
|
pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase,
|
|
videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size,
|
|
videomemory.vidm_pbase, videomemory.vidm_size,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
|
|
/* Map the vector page. */
|
|
pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
|
|
VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
|
|
|
|
/* 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.
|
|
*/
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("switching domains\n");
|
|
#endif
|
|
/* be a client to all domains */
|
|
cpu_domains(0x55555555);
|
|
|
|
/* Switch tables */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("switching to new L1 page table\n");
|
|
#endif
|
|
cpu_setttb(kernel_l1pt.pv_pa);
|
|
|
|
/*
|
|
* We must now clean the cache again....
|
|
* Cleaning may be done by reading new data to displace any
|
|
* dirty data in the cache. This will have happened in cpu_setttb()
|
|
* but since we are boot strapping the addresses used for the read
|
|
* may have just been remapped and thus the cache could be out
|
|
* of sync. A re-clean after the switch will cure this.
|
|
* After booting there are no gross reloations of the kernel thus
|
|
* this problem will not occur after initarm().
|
|
*/
|
|
cpu_idcache_wbinv_all();
|
|
cpu_tlb_flushID();
|
|
cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
|
|
|
|
/*
|
|
* Moved from cpu_startup() as data_abort_handler() references
|
|
* this during uvm init
|
|
*/
|
|
uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
|
|
|
|
/*
|
|
* if there is support for a serial console ...we should now
|
|
* reattach it
|
|
*/
|
|
/* fcomcndetach();*/
|
|
|
|
/*
|
|
* Reflect videomemory relocation in the videomemory structure
|
|
* and reinit console
|
|
*/
|
|
if (bootconfig.vram[0].pages == 0) {
|
|
videomemory.vidm_vbase = VMEM_VBASE;
|
|
} else {
|
|
videomemory.vidm_vbase = VMEM_VBASE;
|
|
bootconfig.display_start = VMEM_VBASE;
|
|
};
|
|
vidc_base = (int *) VIDC_BASE;
|
|
iomd_base = IOMD_BASE;
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("running on the new L1 page table!\n");
|
|
printf("done.\n");
|
|
#endif
|
|
|
|
arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
|
|
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("\n");
|
|
#endif
|
|
|
|
/*
|
|
* Pages were allocated during the secondary bootstrap for the
|
|
* stacks for different CPU modes.
|
|
* We must now set the r13 registers in the different CPU modes to
|
|
* point to these stacks.
|
|
* Since the ARM stacks use STMFD etc. we must set r13 to the top end
|
|
* of the stack memory.
|
|
*/
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("init subsystems: stacks ");
|
|
console_flush();
|
|
#endif
|
|
|
|
set_stackptr(PSR_IRQ32_MODE,
|
|
irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
|
|
set_stackptr(PSR_ABT32_MODE,
|
|
abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
|
|
set_stackptr(PSR_UND32_MODE,
|
|
undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
|
|
#ifdef PMAP_DEBUG
|
|
if (pmap_debug_level >= 0)
|
|
printf("kstack V%08lx P%08lx\n", kernelstack.pv_va,
|
|
kernelstack.pv_pa);
|
|
#endif /* PMAP_DEBUG */
|
|
|
|
/*
|
|
* 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 slightly better one.
|
|
*/
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("vectors ");
|
|
#endif
|
|
data_abort_handler_address = (u_int)data_abort_handler;
|
|
prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
|
|
undefined_handler_address = (u_int)undefinedinstruction_bounce;
|
|
console_flush();
|
|
|
|
|
|
/*
|
|
* 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 0xf0000000
|
|
* The kernel data PTs will handle the mapping of
|
|
* 0xf1000000-0xf5ffffff (80 Mb)
|
|
* 2Meg of VRAM is mapped to 0xf7000000
|
|
* The page tables are mapped to 0xefc00000
|
|
* The IOMD is mapped to 0xf6000000
|
|
* The VIDC is mapped to 0xf6100000
|
|
* The IOMD/VIDC could be pushed up higher but i havent got
|
|
* sufficient documentation to do so; the addresses are not
|
|
* parametized yet and hard to read... better fix this before;
|
|
* its pretty unforgiving.
|
|
*/
|
|
|
|
/* Initialise the undefined instruction handlers */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("undefined ");
|
|
#endif
|
|
undefined_init();
|
|
console_flush();
|
|
|
|
/* Load memory into UVM. */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("page ");
|
|
#endif
|
|
uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */
|
|
for (loop = 0; loop < bootconfig.dramblocks; loop++) {
|
|
paddr_t start = (paddr_t)bootconfig.dram[loop].address;
|
|
paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE);
|
|
|
|
if (start < physical_freestart)
|
|
start = physical_freestart;
|
|
if (end > physical_freeend)
|
|
end = physical_freeend;
|
|
|
|
/* XXX Consider DMA range intersection checking. */
|
|
|
|
uvm_page_physload(atop(start), atop(end),
|
|
atop(start), atop(end), VM_FREELIST_DEFAULT);
|
|
}
|
|
|
|
/* Boot strap pmap telling it where the kernel page table is */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("pmap ");
|
|
#endif
|
|
pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
|
|
console_flush();
|
|
|
|
/* Setup the IRQ system */
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("irq ");
|
|
#endif
|
|
console_flush();
|
|
irq_init();
|
|
#ifdef VERBOSE_INIT_ARM
|
|
printf("done.\n\n");
|
|
#endif
|
|
|
|
#if NVIDCVIDEO>0
|
|
consinit(); /* necessary ? */
|
|
#endif
|
|
|
|
/* Talk to the user */
|
|
printf("NetBSD/evbarm booting ... \n");
|
|
|
|
/* Tell the user if his boot loader is too old */
|
|
if ((bootconfig.magic < BOOTCONFIG_MAGIC) ||
|
|
(bootconfig.version != BOOTCONFIG_VERSION)) {
|
|
printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n");
|
|
delay(5000000);
|
|
}
|
|
|
|
printf("Kernel loaded from file %s\n", bootconfig.kernelname);
|
|
printf("Kernel arg string (@%p) %s\n",
|
|
bootconfig.args, bootconfig.args);
|
|
printf("\nBoot configuration structure reports the following "
|
|
"memory\n");
|
|
|
|
printf(" DRAM block 0a at %08x size %08x "
|
|
"DRAM block 0b at %08x size %08x\n\r",
|
|
bootconfig.dram[0].address,
|
|
bootconfig.dram[0].pages * bootconfig.pagesize,
|
|
bootconfig.dram[1].address,
|
|
bootconfig.dram[1].pages * bootconfig.pagesize);
|
|
printf(" DRAM block 1a at %08x size %08x "
|
|
"DRAM block 1b at %08x size %08x\n\r",
|
|
bootconfig.dram[2].address,
|
|
bootconfig.dram[2].pages * bootconfig.pagesize,
|
|
bootconfig.dram[3].address,
|
|
bootconfig.dram[3].pages * bootconfig.pagesize);
|
|
printf(" VRAM block 0 at %08x size %08x\n\r",
|
|
bootconfig.vram[0].address,
|
|
bootconfig.vram[0].pages * bootconfig.pagesize);
|
|
|
|
#if NKSYMS || defined(DDB) || defined(MODULAR)
|
|
ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start,
|
|
(void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end);
|
|
#endif
|
|
|
|
|
|
#ifdef DDB
|
|
db_machine_init();
|
|
if (boothowto & RB_KDB)
|
|
Debugger();
|
|
#endif /* DDB */
|
|
|
|
/* We return the new stack pointer address */
|
|
return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
|
|
}
|
|
|
|
|
|
static void
|
|
process_kernel_args(void)
|
|
{
|
|
char *args;
|
|
|
|
/* Ok now we will check the arguments for interesting parameters. */
|
|
args = bootconfig.args;
|
|
boothowto = 0;
|
|
|
|
/* Only arguments itself are passed from the new bootloader */
|
|
while (*args == ' ')
|
|
++args;
|
|
|
|
boot_args = args;
|
|
parse_mi_bootargs(boot_args);
|
|
parse_rpc_bootargs(boot_args);
|
|
}
|
|
|
|
|
|
void
|
|
parse_rpc_bootargs(char *args)
|
|
{
|
|
int integer;
|
|
|
|
if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT,
|
|
&integer)) {
|
|
videodram_size = integer;
|
|
/* Round to 4K page */
|
|
videodram_size *= 1024;
|
|
videodram_size = round_page(videodram_size);
|
|
if (videodram_size > 1024*1024)
|
|
videodram_size = 1024*1024;
|
|
}
|
|
}
|
|
/* End of machdep.c */
|