text: /*	$OpenBSD: palm_machdep.c,v 1.5 2010/06/27 08:05:59 drahn Exp $	*/
  /*	$NetBSD: lubbock_machdep.c,v 1.2 2003/07/15 00:25:06 lukem Exp $ */
  
  /*
   * Copyright (c) 2002, 2003  Genetec Corporation.  All rights reserved.
   * Written by Hiroyuki Bessho for Genetec Corporation.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 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.
   * 3. The name of Genetec Corporation may not be used to endorse or
   *    promote products derived from this software without specific prior
   *    written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GENETEC CORPORATION
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   * Machine dependant functions for kernel setup for
   * Intel DBPXA250 evaluation board (a.k.a. Lubbock).
   * Based on iq80310_machhdep.c
   */
  /*
   * Copyright (c) 2001 Wasabi Systems, Inc.
   * All rights reserved.
   *
   * Written by Jason R. Thorpe for Wasabi Systems, Inc.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed for the NetBSD Project by
   *	Wasabi Systems, Inc.
   * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   *    or promote products derived from this software without specific prior
   *    written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  /*
   * Copyright (c) 1997,1998 Mark Brinicombe.
   * Copyright (c) 1997,1998 Causality Limited.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by Mark Brinicombe
   *	for the NetBSD Project.
   * 4. The name of the company nor the name of the author may be used to
   *    endorse or promote products derived from this software without specific
   *    prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * Machine dependant functions for kernel setup for Intel IQ80310 evaluation
   * boards using RedBoot firmware.
   */
  
  /*
   * DIP switches:
   *
   * S19: no-dot: set RB_KDB.  enter kgdb session.
   * S20: no-dot: set RB_SINGLE. don't go multi user mode.
   */
  
  #include <sys/param.h>
  #include <sys/device.h>
  #include <sys/systm.h>
  #include <sys/kernel.h>
  #include <sys/exec.h>
  #include <sys/proc.h>
  #include <sys/msgbuf.h>
  #include <sys/reboot.h>
  #include <sys/termios.h>
  #include <sys/kcore.h>
  
  #include <uvm/uvm_extern.h>
  
  #include <sys/conf.h>
  #include <sys/queue.h>
  #include <sys/device.h>
  #include <dev/cons.h>
  
  #include <machine/db_machdep.h>
  #include <ddb/db_sym.h>
  #include <ddb/db_extern.h>
  #ifdef KGDB
  #include <sys/kgdb.h>
  #endif
  
  #include <machine/bootconfig.h>
  #include <machine/bus.h>
  #include <machine/cpu.h>
  #include <machine/frame.h>
  #include <arm/kcore.h>
  #include <arm/undefined.h>
  #include <arm/machdep.h>
  
  #include <arm/xscale/pxa2x0reg.h>
  #include <arm/xscale/pxa2x0var.h>
  #include <arm/xscale/pxa2x0_gpio.h>
  #include <arm/sa11x0/sa1111_reg.h>
  #include <machine/machine_reg.h>
  #include <machine/palm_var.h>
  
  #include "wsdisplay.h"
  
  int mach = -1;	/* machine ID */
  
  /* Kernel text starts 2MB in from the bottom of the kernel address space. */
  #define	KERNEL_TEXT_BASE	(KERNEL_BASE + 0x00200000)
  #define	KERNEL_VM_BASE		(KERNEL_BASE + SDRAM_SIZE)
  
  /*
   * The range 0xc1000000 - 0xccffffff is available for kernel VM space
   * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
   */
  /*
  #define KERNEL_VM_SIZE		0x0C000000
  */
  #define KERNEL_VM_SIZE		0x10000000
  
  
  /*
   * Address to call from cpu_reset() to reset the machine.
   * This is machine architecture dependant as it varies depending
   * on where the ROM appears when you turn the MMU off.
   */
  
  u_int cpu_reset_address = 0;
  
  /* Define various stack sizes in pages */
  #define IRQ_STACK_SIZE	1
  #define ABT_STACK_SIZE	1
  #ifdef IPKDB
  #define UND_STACK_SIZE	2
  #else
  #define UND_STACK_SIZE	1
  #endif
  
  BootConfig bootconfig;		/* Boot config storage */
  char *boot_args = NULL;
  char *boot_file = NULL;
  
  paddr_t physical_start;
  paddr_t physical_freestart;
  paddr_t physical_freeend;
  paddr_t physical_end;
  u_int free_pages;
  int physmem = 0;
  
  /*int debug_flags;*/
  #ifndef PMAP_STATIC_L1S
  int max_processes = 64;			/* Default number */
  #endif	/* !PMAP_STATIC_L1S */
  
  /* Physical and virtual addresses for some global pages */
  pv_addr_t systempage;
  pv_addr_t irqstack;
  pv_addr_t undstack;
  pv_addr_t abtstack;
  extern pv_addr_t kernelstack;
  pv_addr_t minidataclean;
  
  paddr_t msgbufphys;
  
  extern u_int data_abort_handler_address;
  extern u_int prefetch_abort_handler_address;
  extern u_int undefined_handler_address;
  
  #ifdef PMAP_DEBUG
  extern int pmap_debug_level;
  #endif
  
  #define KERNEL_PT_SYS		0	/* Page table for mapping proc0 zero page */
  #define KERNEL_PT_KERNEL	1	/* Page table for mapping kernel */
  #define	KERNEL_PT_KERNEL_NUM	32
  #define KERNEL_PT_VMDATA	(KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM)
  				        /* Page tables for mapping kernel VM */
  #define	KERNEL_PT_VMDATA_NUM	8	/* start with 32MB of KVM */
  #define NUM_KERNEL_PTS		(KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
  
  pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
  
  extern struct user *proc0paddr;
  
  /*
   * safepri is a safe priority for sleep to set for a spin-wait
   * during autoconfiguration or after a panic.
   */
  int   safepri = 0;
  
  /* Prototypes */
  
  #define	BOOT_STRING_MAGIC 0x4f425344
  
  char	bootargs[MAX_BOOT_STRING];
  inline void	process_kernel_args(int *);
  
  void	consinit(void);
  void	early_clkman(u_int, int);
  void	kgdb_port_init(void);
  void	change_clock(uint32_t v);
  
  bs_protos(bs_notimpl);
  
  #include "com.h"
  #if NCOM > 0
  #include <dev/ic/comvar.h>
  #include <dev/ic/comreg.h>
  #endif
  
  #ifndef CONSPEED
  #define CONSPEED B9600	/* What RedBoot uses */
  #endif
  #ifndef CONMODE
  #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
  #endif
  
  int comcnspeed = CONSPEED;
  int comcnmode = CONMODE;
  
  struct gpio_map {
  	int	gpio;
  	int	fn;
  };
  
  struct gpio_map palm_gpio_map[] = {
  	/* FFUART aka serial port on the connector */
  	{34,	GPIO_ALT_FN_1_IN},
  	{39,	GPIO_ALT_FN_2_OUT},
  
  	/* STUART aka. IrDA */
  	{46,	GPIO_ALT_FN_2_IN},
  	{47,	GPIO_ALT_FN_1_OUT},
  
  	/* Keypad controller */
  	{100,	GPIO_ALT_FN_1_IN},
  	{101,	GPIO_ALT_FN_1_IN},
  	{102,	GPIO_ALT_FN_1_IN},
  	{97,	GPIO_ALT_FN_3_IN},
  	{103,	GPIO_ALT_FN_2_OUT},
  	{104,	GPIO_ALT_FN_2_OUT},
  	{105,	GPIO_ALT_FN_2_OUT},
  };
  
  inline void gpio_setup(struct gpio_map *map, int size);
  
  inline void
  gpio_setup(struct gpio_map *map, int size)
  {
  	int i;
  	for (i = 0; i < size; i++)
  		pxa2x0_gpio_set_function(map[i].gpio, map[i].fn);
  }
  
  /*
   * void boot(int howto)
   *
   * Reboots the system
   *
   * Deal with any syncing, unmounting, dumping and shutdown hooks,
   * then reset the CPU.
   */
  void
  boot(int howto)
  {
  	if (cold) {
  		/*
  		 * If the system is cold, just halt, unless the user
  		 * explicitely asked for reboot.
  		 */
  		if ((howto & RB_USERREQ) == 0)
  			howto |= RB_HALT;
  		goto haltsys;
  	}
  
  	/*
  	 * If RB_NOSYNC was not specified sync the discs.
  	 * Note: Unless cold is set to 1 here, syslogd will die during the
  	 * unmount.  It looks like syslogd is getting woken up only to find
  	 * that it cannot page part of the binary in as the filesystem has
  	 * been unmounted.
  	 */
  	if (!(howto & RB_NOSYNC))
  		bootsync(howto);
  
  	/* Say NO to interrupts */
  	splhigh();
  
  	/* Do a dump if requested. */
  	if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
  		dumpsys();
  	
  haltsys:
  	doshutdownhooks();
  
  	/* Make sure IRQ's are disabled */
  	IRQdisable;
  
  	if (howto & RB_HALT) {
  #if NAPM > 0
  		if (howto & RB_POWERDOWN) {
  
  			printf("\nAttempting to power down...\n");
  			delay(6000000);
  			zapm_poweroff();
  		}
  #endif
  
  		printf("The operating system has halted.\n");
  		printf("Please press any key to reboot.\n\n");
  		cnpollc(1);
  		cngetc();
  		cnpollc(0);
  	}
  
  	printf("rebooting...\n");
  	delay(6000000);
  #if NAPM > 0
  	zapm_restart();
  #endif
  	printf("reboot failed; spinning\n");
  	while(1);
  	/*NOTREACHED*/
  }
  
  static __inline
  pd_entry_t *
  read_ttb(void)
  {
    long ttb;
  
    __asm __volatile("mrc	p15, 0, %0, c2, c0, 0" : "=r" (ttb));
  
  
    return (pd_entry_t *)(ttb & ~((1<<14)-1));
  }
  
  /*
   * Mapping table for core kernel memory. These areas are mapped in
   * init time at fixed virtual address with section mappings.
   */
  struct l1_sec_map {
  	vaddr_t	va;
  	vaddr_t	pa;
  	vsize_t	size;
  	int flags;
  } l1_sec_table[] = {
      {
  	    PALM_GPIO_VBASE,
  	    PXA2X0_GPIO_BASE,
  	    PXA2X0_GPIO_SIZE,
  	    PTE_NOCACHE,
      },
      {
  	    PALM_CLKMAN_VBASE,
  	    PXA2X0_CLKMAN_BASE,
  	    PXA2X0_CLKMAN_SIZE,
  	    PTE_NOCACHE,
      },
      {
  	    PALM_INTCTL_VBASE,
  	    PXA2X0_INTCTL_BASE,
  	    PXA2X0_INTCTL_SIZE,
  	    PTE_NOCACHE,
      },
      {0, 0, 0, 0,}
  };
  
  static void
  map_io_area(paddr_t pagedir)
  {
  	int loop;
  
  	/*
  	 * Map devices we can map w/ section mappings.
  	 */
  	loop = 0;
  	while (l1_sec_table[loop].size) {
  		vsize_t sz;
  
  #define VERBOSE_INIT_ARM
  #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(pagedir, l1_sec_table[loop].va + sz,
  			    l1_sec_table[loop].pa + sz,
  			    VM_PROT_READ|VM_PROT_WRITE,
  			    l1_sec_table[loop].flags);
  		++loop;
  	}
  }
  
  /*
   * simple memory mapping function used in early bootstrap stage
   * before pmap is initialized.
   * size and cacheability are ignored and map one section with nocache.
   */
  static vaddr_t section_free = PALM_VBASE_FREE;
  
  static int
  bootstrap_bs_map(void *t, bus_addr_t bpa, bus_size_t size,
      int flags, bus_space_handle_t *bshp)
  {
  	u_long startpa;
  	vaddr_t va;
  	pd_entry_t *pagedir = read_ttb();
  	/* This assumes PA==VA for page directory */
  
  	va = section_free;
  	section_free += L1_S_SIZE;
  
  	startpa = trunc_page(bpa);
  	pmap_map_section((vaddr_t)pagedir, va, startpa,
  	    VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE);
  	cpu_tlb_flushD();
  
  	*bshp = (bus_space_handle_t)(va + (bpa - startpa));
  
  	return(0);
  }
  
  static void
  copy_io_area_map(pd_entry_t *new_pd)
  {
  	pd_entry_t *cur_pd = read_ttb();
  	vaddr_t va;
  
  	for (va = PALM_IO_AREA_VBASE;
  	     (cur_pd[va>>L1_S_SHIFT] & L1_TYPE_MASK) == L1_TYPE_S;
  	     va += L1_S_SIZE) {
  
  		new_pd[va>>L1_S_SHIFT] = cur_pd[va>>L1_S_SHIFT];
  		if (va == (0 - L1_S_SIZE))
  			break; /* STUPID */
  
  	}
  }
  
  #if 0
  void sysprobe(void);
  void
  sysprobe(void)
  {
  	u_int32_t *p;
  
  	p = (void *)0x48000014; /* MECR */
  	printf("MECR %x\n", *p);
  
  	p = (void *)0x48000028; /* MCMEM0 */
  	printf("MCMEM0 %x\n", *p);
  	p = (void *)0x4800002C; /* MCMEM1 */
  	printf("MCMEM1 %x\n", *p);
  
  	p = (void *)0x48000030; /* MCATTx */
  	printf("MCATT0 %x\n", *p);
  	p = (void *)0x48000034; /* MCATTx */
  	printf("MCATT1 %x\n", *p);
  
  	p = (void *)0x48000038; /* MCIOx */
  	printf("MCIO0 %x\n", *p);
  	p = (void *)0x4800003C; /* MCIOx */
  	printf("MCIO1 %x\n", *p);
  }
  #endif
  
  /*
   * u_int initarm(...)
   *
   * Initial entry point on startup. This gets called before main() is
   * entered.
   * It should be responsible for setting up everything that must be
   * in place when main is called.
   * This includes
   *   Taking a copy of the boot configuration structure.
   *   Initialising the physical console so characters can be printed.
   *   Setting up page tables for the kernel
   *   Relocating the kernel to the bottom of physical memory
   */
  u_int
  initarm(void *arg)
  {
  	extern vaddr_t xscale_cache_clean_addr;
  	extern cpu_kcore_hdr_t cpu_kcore_hdr;
  	int loop;
  	int loop1;
  	u_int l1pagetable;
  	pv_addr_t kernel_l1pt;
  	paddr_t memstart;
  	psize_t memsize;
  	extern u_int32_t esym;	/* &_end if no symbols are loaded */
  
  #if 0
  	int led_data = 0;
  #endif
  #ifdef DIAGNOSTIC
  	extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */
  #endif
  	/* early bus_space_map support */
  	struct bus_space tmp_bs_tag;
  	int	(*map_func_save)(void *, bus_addr_t, bus_size_t, int,
  	    bus_space_handle_t *);
  
  
  #if 0
  	/* XXX */
  	/* start 32.768KHz OSC */
  	ioreg_write(PXA2X0_CLKMAN_BASE + 0x08, 2);
  #endif
  
  	/*
  	 * Heads up ... Setup the CPU / MMU / TLB functions
  	 */
  	if (set_cpufuncs())
  		panic("cpu not recognized!");
  
  	/* Get ready for splfoo() */
  	pxa2x0_intr_bootstrap(PXA2X0_INTCTL_BASE);
  
  #if 0
  	/* Calibrate the delay loop. */
  #endif
  
  	/*
  	 * Okay, RedBoot has provided us with the following memory map:
  	 *
  	 * Physical Address Range     Description
  	 * -----------------------    ----------------------------------
  	 * 0x00000000 - 0x01ffffff    flash Memory   (32MB)
  	 * 0x04000000 - 0x05ffffff    Application flash Memory  (32MB)
  	 * 0x08000000 - 0x080000ff    I/O baseboard registers
  	 * 0x0a000000 - 0x0a0fffff    SRAM (1MB)
  	 * 0x0c000000 - 0x0c0fffff    Ethernet Controller
  	 * 0x0e000000 - 0x0e0fffff    Ethernet Controller (Attribute)
  	 * 0x10000000 - 0x103fffff    SA-1111 Companion Chip
  	 * 0x14000000 - 0x17ffffff    Expansion Card (64MB)
  	 * 0x40000000 - 0x480fffff    Processor Registers
  	 * 0xa0000000 - 0xa3ffffff    SDRAM Bank 0 (64MB)
  	 *
  	 *
  	 * Virtual Address Range    X C B  Description
  	 * -----------------------  - - -  ----------------------------------
  	 * 0x00000000 - 0x00003fff  N Y Y  SDRAM
  	 * 0x00004000 - 0x000fffff  N Y N  Boot ROM
  	 * 0x00100000 - 0x01ffffff  N N N  Application Flash
  	 * 0x04000000 - 0x05ffffff  N N N  Exp Application Flash
  	 * 0x08000000 - 0x080fffff  N N N  I/O baseboard registers
  	 * 0x0a000000 - 0x0a0fffff  N N N  SRAM
  	 * 0x40000000 - 0x480fffff  N N N  Processor Registers
  	 * 0xa0000000 - 0xa000ffff  N Y N  RedBoot SDRAM
  	 * 0xa0017000 - 0xa3ffffff  Y Y Y  SDRAM
  	 * 0xc0000000 - 0xcfffffff  Y Y Y  Cache Flush Region
  	 * (done by this routine)
  	 * 0xfd000000 - 0xfd0000ff  N N N  I/O baseboard registers
  	 * 0xfd100000 - 0xfd2fffff  N N N  Processor Registers.
  	 * 0xfd200000 - 0xfd2fffff  N N N  0x10800000 registers
  	 *
  	 * The first level page table is at 0xa0004000.  There are also
  	 * 2 second-level tables at 0xa0008000 and 0xa0008400.
  	 *
  	 */
  
  	{
  		/*
  		 * Tweak RedBoot's pagetable so that we can access to
  		 * some registers at same VA before and after installing
  		 * our page table.
  		 */
  		paddr_t ttb = (paddr_t)read_ttb();
  
  		map_io_area(ttb);
  		cpu_tlb_flushD();
  	}
  
  	/*
  	 * Examine the boot args string for options we need to know about
  	 * now.
  	 */
  	/* XXX should really be done after setting up the console, but we
  	 * XXX need to parse the console selection flags right now. */
  	process_kernel_args((int *)0x40f00008);
  
  	/*
  	 * This test will work for now but has to be revised when support
  	 * for other models is added.
  	 */
  
  	/* setup GPIO for BTUART, in case bootloader doesn't take care of it */
  	pxa2x0_gpio_bootstrap(PALM_GPIO_VBASE);
  
  	/*
  	 * Do GPIO setup
  	 */
  	gpio_setup(palm_gpio_map, sizeof(palm_gpio_map)/sizeof(struct gpio_map));
  
  #ifdef COM_PXA2X0
  	/* tell com to drive STUART in slow infrared mode */
  	comsiraddr = (bus_addr_t)PXA2X0_STUART_BASE;
  #endif
  #if 1
  	/* turn on clock to UART block.
  	   XXX this should not be necessary, consinit() will do it */
  	early_clkman(CKEN_FFUART | CKEN_BTUART | CKEN_STUART, 1);
  #endif
  
  	/*
  	 * Temporarily replace bus_space_map() functions so that
  	 * console devices can get mapped.
  	 *
  	 * Note that this relies upon the fact that both regular
  	 * and a4x bus_space tags use the same map function.
  	 */
  	tmp_bs_tag = pxa2x0_bs_tag;
  	tmp_bs_tag.bs_map = bootstrap_bs_map;
  	map_func_save = pxa2x0_bs_tag.bs_map;
  #ifdef COM_PXA2X0
  	pxa2x0_a4x_bs_tag.bs_map = pxa2x0_bs_tag.bs_map = bootstrap_bs_map;
  #endif
  	/* setup a serial console for very early boot */
  	consinit();
  #ifdef KGDB
  	kgdb_port_init();
  #endif
  
  
  	/* Talk to the user */
  	printf("\nOpenBSD/Palm booting ...\n");
  
  	{
  		/* XXX - all Palm have this for now, fix memory sizing */
  		memstart = SDRAM_START;
  		memsize =  SDRAM_SIZE;
  	}
  
  #if 0
  	{
  		volatile int *p;
  		char *membase;
  		char *memmax;
  		int  chunksize = 0x02000000;
  		printf("probing memory");
  
  		membase = (char *)0xa0000000;
  		memmax  = (char *)0xc0000000;
  		for (p = (int *)membase;
  		    p < (int *)memmax;
  		    p = (int *) (((char *)p) + chunksize)) {
  			printf ("cbase %p\n", p);
  			p[0] = 0x12345678;
  			p[1] = 0x12345678;
  			if ((p[0] != 0x12345678) || (p[1] != 0x12345678))
  				break;
  		}
  			memsize = ((char *)p) - membase;
  
  		printf("probing memory done found memsize %d\n", memsize);
  	}
  #else
  #endif
  
  #define DEBUG
  #ifdef DEBUG
  	printf("initarm: Configuring system ...\n");
  #endif
  
  	/* Fake bootconfig structure for the benefit of pmap.c */
  	/* XXX must make the memory description h/w independant */
  	bootconfig.dramblocks = 1;
  	bootconfig.dram[0].address = memstart;
  	bootconfig.dram[0].pages = memsize / PAGE_SIZE;
  
  	/*
  	 * Set up the variables that define the availablilty of
  	 * physical memory.  For now, we're going to set
  	 * physical_freestart to 0xa0200000 (where the kernel
  	 * was loaded), and allocate the memory we need downwards.
  	 * If we get too close to the page tables that RedBoot
  	 * set up, we will panic.  We will update physical_freestart
  	 * and physical_freeend later to reflect what pmap_bootstrap()
  	 * wants to see.
  	 *
  	 * XXX pmap_bootstrap() needs an enema.
  	 */
  	physical_start = bootconfig.dram[0].address;
  	physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
  
  	physical_freestart = 0xa0009000UL;
  	physical_freeend = 0xa0200000UL;
  
  	physmem = (physical_end - physical_start) / PAGE_SIZE;
  
  #ifdef DEBUG
  	/* Tell the user about the memory */
  	printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem,
  	    physical_start, physical_end - 1);
  #endif
  
  	/*
  	 * Okay, the kernel starts 2MB in from the bottom of physical
  	 * memory.  We are going to allocate our bootstrap pages downwards
  	 * from there.
  	 *
  	 * We need to allocate some fixed page tables to get the kernel
  	 * going.  We allocate one page directory and a number of page
  	 * tables and store the physical addresses in the kernel_pt_table
  	 * array.
  	 *
  	 * The kernel page directory must be on a 16K boundary.  The page
  	 * tables must be on 4K bounaries.  What we do is allocate the
  	 * page directory on the first 16K boundary that we encounter, and
  	 * the page tables on 4K boundaries otherwise.  Since we allocate
  	 * at least 3 L2 page tables, we are guaranteed to encounter at
  	 * least one 16K aligned region.
  	 */
  
  #ifdef VERBOSE_INIT_ARM
  	printf("Allocating page tables\n");
  #endif
  
  	free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
  
  #ifdef VERBOSE_INIT_ARM
  	printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
  	       physical_freestart, free_pages, free_pages);
  #endif
  
  	/* Define a macro to simplify memory allocation */
  #define	valloc_pages(var, np)				\
  	alloc_pages((var).pv_pa, (np));			\
  	(var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
  
  #define alloc_pages(var, np)				\
  	physical_freeend -= ((np) * PAGE_SIZE);		\
  	if (physical_freeend < physical_freestart)	\
  		panic("initarm: out of memory");	\
  	(var) = physical_freeend;			\
  	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_freeend - L1_TABLE_SIZE) & (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;
  		}
  	}
  
  	/* This should never be able to happen but better confirm that. */
  	if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
  		panic("initarm: Failed to align the kernel page directory");
  
  	/*
  	 * Allocate a page for the system page mapped to V0x00000000
  	 * This page will just contain the system vectors and can be
  	 * shared by all processes.
  	 */
  	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);
  
  	/* Allocate enough pages for cleaning the Mini-Data cache. */
  	KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
  	valloc_pages(minidataclean, 1);
  
  #ifdef VERBOSE_INIT_ARM
  	printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
  	    irqstack.pv_va);
  	printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
  	    abtstack.pv_va);
  	printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
  	    undstack.pv_va);
  	printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
  	    kernelstack.pv_va);
  #endif
  
  	/*
  	 * XXX Defer this to later so that we can reclaim the memory
  	 * XXX used by the RedBoot page tables.
  	 */
  	alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
  
  	/*
  	 * Ok we have allocated physical pages for the primary kernel
  	 * page tables
  	 */
  
  #ifdef VERBOSE_INIT_ARM
  	printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
  #endif
  
  	/*
  	 * Now we start construction of the L1 page table
  	 * We start by mapping the L2 page tables into the L1.
  	 * This means that we can replace L1 mappings later on if necessary
  	 */
  	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]);
  
  	for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
  		pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
  		    &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
  
  	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]);
  
  	/* update the top of the kernel VM */
  	pmap_curmaxkvaddr =
  	    KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
  
  #ifdef VERBOSE_INIT_ARM
  	printf("Mapping kernel\n");
  #endif
  
  	/* Now we fill in the L2 pagetable for the kernel static code/data
  	 * and the symbol table. */
  	{
  		extern char etext[];
  		size_t textsize = (u_int32_t) etext - KERNEL_TEXT_BASE;
  		size_t totalsize = esym - KERNEL_TEXT_BASE;
  		u_int logical;
  
  		textsize = (textsize + PGOFSET) & ~PGOFSET;
  		totalsize = (totalsize + PGOFSET) & ~PGOFSET;
  		
  		logical = 0x00200000;	/* offset of kernel in RAM */
  
  		/* Update dump information */
  		cpu_kcore_hdr.kernelbase = KERNEL_BASE;
  		cpu_kcore_hdr.kerneloffs = logical;
  		cpu_kcore_hdr.staticsize = totalsize;
  
  		logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
  		    physical_start + logical, textsize,
  		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  		pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
  		    physical_start + logical, totalsize - textsize,
  		    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  	}
  
  #ifdef VERBOSE_INIT_ARM
  	printf("Constructing L2 page tables\n");
  #endif
  
  	/* Map the stack pages */
  	pmap_map_chunk(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);
  	}
  
  	/* Map the Mini-Data cache clean area. */
  	xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
  	    minidataclean.pv_pa);
  
  	/* Map the vector page. */
  #if 1
  	/* MULTI-ICE requires that page 0 is NC/NB so that it can download the
  	 * cache-clean code there.  */
  	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
  	    VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
  #else
  	pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
  	    VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
  #endif
  
  	/*
  	 * map integrated peripherals at same address in l1pagetable
  	 * so that we can continue to use console.
  	 */
  	copy_io_area_map((pd_entry_t *)l1pagetable);
  
  	/*
  	 * Give the XScale global cache clean code an appropriately
  	 * sized chunk of unmapped VA space starting at 0xff000000
  	 * (our device mappings end before this address).
  	 */
  	xscale_cache_clean_addr = 0xff000000U;
  
  	/*
  	 * 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.
  	 */
  
  	/*
  	 * Update the physical_freestart/physical_freeend/free_pages
  	 * variables.
  	 */
  	{
  		physical_freestart = physical_start +
  		    (((esym + PGOFSET) & ~PGOFSET) - KERNEL_BASE);
  		physical_freeend = physical_end;
  		free_pages =
  		    (physical_freeend - physical_freestart) / PAGE_SIZE;
  	}
  
  	/* be a client to all domains */
  	cpu_domains(0x55555555);
  	/* Switch tables */
  #ifdef VERBOSE_INIT_ARM
  	printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
  	       physical_freestart, free_pages, free_pages);
  	printf("switching to new L1 page table  @%#lx...", kernel_l1pt.pv_pa);
  #endif
  
  	/* set new intc register address so that splfoo() doesn't
  	   touch illegal address.  */
  	pxa2x0_intr_bootstrap(PALM_INTCTL_VBASE);
  
  	cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
  	setttb(kernel_l1pt.pv_pa);
  	cpu_tlb_flushID();
  	cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
  
  	/*
  	 * Moved from cpu_startup() as data_abort_handler() references
  	 * this during uvm init
  	 */
  	proc0paddr = (struct user *)kernelstack.pv_va;
  	proc0.p_addr = proc0paddr;
  
  #ifdef VERBOSE_INIT_ARM
  	printf("bootstrap done.\n");
  #endif
  
  	arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
  
  	/*
  	 * Pages were allocated during the secondary bootstrap for the
  	 * stacks for different CPU modes.
  	 * We must now set the r13 registers in the different CPU modes to
  	 * point to these stacks.
  	 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
  	 * of the stack memory.
  	 */
  #ifdef VERBOSE_INIT_ARM
  	printf("init subsystems: stacks ");
  #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);
  
  	/*
  	 * 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;
  
  	/* Initialise the undefined instruction handlers */
  #ifdef VERBOSE_INIT_ARM
  	printf("undefined ");
  #endif
  	undefined_init();
  
  	/* Load memory into UVM. */
  #ifdef VERBOSE_INIT_ARM
  	printf("page ");
  #endif
  	uvm_setpagesize();        /* initialize PAGE_SIZE-dependent variables */
  	uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
  	    atop(physical_freestart), atop(physical_freeend),
  	    VM_FREELIST_DEFAULT);
  
  	/* Boot strap pmap telling it where the kernel page table is */
  #ifdef VERBOSE_INIT_ARM
  	printf("pmap ");
  #endif
  	pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE,
  	    KERNEL_VM_BASE + KERNEL_VM_SIZE);
  
  	/* Update dump information */
  	cpu_kcore_hdr.pmap_kernel_l1 = (u_int32_t)pmap_kernel()->pm_l1;
  	cpu_kcore_hdr.pmap_kernel_l2 = (u_int32_t)&(pmap_kernel()->pm_l2);
  
  #ifdef __HAVE_MEMORY_DISK__
  	md_root_setconf(memory_disk, sizeof memory_disk);
  #endif
  
  #ifdef IPKDB
  	/* Initialise ipkdb */
  	ipkdb_init();
  	if (boothowto & RB_KDB)
  		ipkdb_connect(0);
  #endif
  
  #ifdef KGDB
  	if (boothowto & RB_KDB) {
  		kgdb_debug_init = 1;
  		kgdb_connect(1);
  	}
  #endif
  
  	/*
  	 * Restore proper bus_space operation, now that pmap is initialized.
  	 */
  #ifdef COM_PXA2X0
  	pxa2x0_a4x_bs_tag.bs_map = pxa2x0_bs_tag.bs_map = map_func_save;
  #endif
  
  #ifdef DDB
  	db_machine_init();
  
  	/* Firmware doesn't load symbols. */
  	ddb_init();
  
  	if (boothowto & RB_KDB)
  		Debugger();
  #endif
  
  	/* We return the new stack pointer address */
  	return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
  }
  
  const char *console = "glass";
  
  inline void
  process_kernel_args(int *args)
  {
  	if (args[0] == 917 ||	/* Palm T5 */
  	    args[0] == 918 ||	/* Palm TC */
  	    args[0] == 885 ||	/* Palm TX */
  	    args[0] == 835 ||	/* Palm LD */
  	    args[0] == 904)	/* Palm Z72 */
  		mach = args[0];
  }
  
  #ifdef KGDB
  #ifndef KGDB_DEVNAME
  #define KGDB_DEVNAME "ffuart"
  #endif
  const char kgdb_devname[] = KGDB_DEVNAME;
  
  #if (NCOM > 0)
  #ifndef KGDB_DEVMODE
  #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
  #endif
  int comkgdbmode = KGDB_DEVMODE;
  #endif /* NCOM */
  
  #endif /* KGDB */
  
  void
  consinit(void)
  {
  #if (NCOM > 0) && defined(COM_PXA2X0)
  	static int consinit_called = 0;
  	paddr_t paddr;
  	u_int cken = 0;
  
  	if (consinit_called != 0)
  		return;
  
  	consinit_called = 1;
  
  #ifdef KGDB
  	if (strcmp(kgdb_devname, console) == 0) {
  		/* port is reserved for kgdb */
  	} else
  #endif
  	if (strcmp(console, "ffuart") == 0) {
  		paddr = PXA2X0_FFUART_BASE;
  		cken = CKEN_FFUART;
  	} else if (strcmp(console, "btuart") == 0) {
  		paddr = PXA2X0_BTUART_BASE;
  		cken = CKEN_BTUART;
  	} else if (strcmp(console, "stuart") == 0) {
  		paddr = PXA2X0_STUART_BASE;
  		cken = CKEN_STUART;
  	}
  	if (cken != 0 && comcnattach(&pxa2x0_a4x_bs_tag, paddr, comcnspeed,
  	    PXA2X0_COM_FREQ, comcnmode) == 0) {
  		early_clkman(cken, 1);
  	}
  #endif /* NCOM */
  }
  
  #ifdef KGDB
  void
  kgdb_port_init(void)
  {
  #if (NCOM > 0) && defined(COM_PXA2X0)
  	paddr_t paddr;
  	u_int cken;
  
  	if (strcmp(kgdb_devname, "ffuart") == 0) {
  		paddr = PXA2X0_FFUART_BASE;
  		cken = CKEN_FFUART;
  	} else if (strcmp(kgdb_devname, "btuart") == 0) {
  		paddr = PXA2X0_BTUART_BASE;
  		cken = CKEN_BTUART;
  	} else if (strcmp(kgdb_devname, "stuart") == 0) {
  		paddr = PXA2X0_STUART_BASE;
  		cken = CKEN_STUART;
  		irda_on(0);
  	} else
  		return;
  
  	if (com_kgdb_attach_pxa2x0(&pxa2x0_a4x_bs_tag, paddr,
  	    kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode) == 0) {
  		early_clkman(cken, 1);
  	}
  #endif
  }
  #endif
  
  /* same as pxa2x0_clkman, but before autoconf */
  void
  early_clkman(u_int clk, int enable)
  {
  	u_int32_t rv;
  
  	rv = ioreg_read(PALM_CLKMAN_VBASE + CLKMAN_CKEN);
  	if (enable)
  		rv |= clk;
  	else
  		rv &= ~clk;
  	ioreg_write(PALM_CLKMAN_VBASE + CLKMAN_CKEN, rv);
  }
  
  int glass_console = 0;
  
  void
  board_startup(void)
  {
  	extern int lcd_cnattach(void (*)(u_int, int));
  #ifdef COM_PXA2X0
  	extern bus_addr_t comconsaddr;
  #endif
  
  #if NWSDISPLAY > 0
  	/*
  	 * Try to attach the display console now that VM services
  	 * are available.
  	 */
  
  //	if ((cputype & ~CPU_ID_XSCALE_COREREV_MASK) == CPU_ID_PXA27X) {
  		if (strcmp(console, "glass") == 0) {
  			printf("attempting to switch console to lcd screen\n");
  			glass_console = 1;
  		}
  		if (glass_console == 1 && lcd_cnattach(early_clkman) == 0) {
  			/*
  			 * Kill the existing serial console.
  			 * XXX need to bus_space_unmap resources and disable
  			 *     clocks...
  			 */
  			comconsaddr = 0;
  
  			/*
  			 * Display the copyright notice again on the new console
  			 */
  			extern const char copyright[];
  			printf("%s\n", copyright);
  			printf("OpenBSD running on: %s\n", mach_name());
  		}
  //	}
  #endif
  
          if (boothowto & RB_CONFIG) {
  #ifdef BOOT_CONFIG
  		user_config();
  #else
  		printf("kernel does not support -c; continuing..\n");
  #endif
  	}
  }
  