text: /*	$NetBSD: i80321_space.c,v 1.6 2003/10/06 15:43:35 thorpej Exp $	*/
  
  /*-
   * Copyright (c) 2001, 2002 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.
   */
  
  /*
   * bus_space functions for i81342 I/O Processor.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/9.3/sys/arm/xscale/i8134x/i81342_space.c 171626 2007-07-27 14:50:57Z cognet $");
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/bus.h>
  #include <sys/malloc.h>
  
  #include <machine/pcb.h>
  
  #include <vm/vm.h>
  #include <vm/vm_kern.h>
  #include <vm/pmap.h>
  #include <vm/vm_page.h>
  #include <vm/vm_extern.h>
  
  #include <machine/bus.h>
  
  #include <arm/xscale/i8134x/i81342reg.h>
  #include <arm/xscale/i8134x/i81342var.h>
  
  /* Prototypes for all the bus_space structure functions */
  bs_protos(i81342);
  bs_protos(i81342_io);
  bs_protos(i81342_mem);
  bs_protos(generic);
  bs_protos(generic_armv4);
  
  /*
   * Template bus_space -- copied, and the bits that are NULL are
   * filled in.
   */
  const struct bus_space i81342_bs_tag_template = {
  	/* cookie */
  	(void *) 0,
  
  	/* mapping/unmapping */
  	NULL,
  	NULL,
  	i81342_bs_subregion,
  
  	/* allocation/deallocation */
  	NULL,
  	NULL,
  
  	/* barrier */
  	i81342_bs_barrier,
  
  	/* read (single) */
  	generic_bs_r_1,
  	generic_armv4_bs_r_2,
  	generic_bs_r_4,
  	NULL,
  
  	/* read multiple */
  	generic_bs_rm_1,
  	generic_armv4_bs_rm_2,
  	generic_bs_rm_4,
  	NULL,
  
  	/* read region */
  	generic_bs_rr_1,
  	generic_armv4_bs_rr_2,
  	generic_bs_rr_4,
  	NULL,
  
  	/* write (single) */
  	generic_bs_w_1,
  	generic_armv4_bs_w_2,
  	generic_bs_w_4,
  	NULL,
  
  	/* write multiple */
  	generic_bs_wm_1,
  	generic_armv4_bs_wm_2,
  	generic_bs_wm_4,
  	NULL,
  
  	/* write region */
  	NULL,
  	generic_armv4_bs_wr_2,
  	generic_bs_wr_4,
  	NULL,
  
  	/* set multiple */
  	NULL,
  	NULL,
  	NULL,
  	NULL,
  
  	/* set region */
  	NULL,
  	generic_armv4_bs_sr_2,
  	generic_bs_sr_4,
  	NULL,
  
  	/* copy */
  	NULL,
  	generic_armv4_bs_c_2,
  	NULL,
  	NULL,
  
  	/* read (single) stream */
  	generic_bs_r_1,
  	generic_armv4_bs_r_2,
  	generic_bs_r_4,
  	NULL,
  
  	/* read multiple stream */
  	generic_bs_rm_1,
  	generic_armv4_bs_rm_2,
  	generic_bs_rm_4,
  	NULL,
  
  	/* read region stream */
  	generic_bs_rr_1,
  	generic_armv4_bs_rr_2,
  	generic_bs_rr_4,
  	NULL,
  
  	/* write (single) stream */
  	generic_bs_w_1,
  	generic_armv4_bs_w_2,
  	generic_bs_w_4,
  	NULL,
  
  	/* write multiple stream */
  	generic_bs_wm_1,
  	generic_armv4_bs_wm_2,
  	generic_bs_wm_4,
  	NULL,
  
  	/* write region stream */
  	NULL,
  	generic_armv4_bs_wr_2,
  	generic_bs_wr_4,
  	NULL,
  };
  
  void
  i81342_bs_init(bus_space_tag_t bs, void *cookie)
  {
  
  	*bs = i81342_bs_tag_template;
  	bs->bs_cookie = cookie;
  }
  
  void
  i81342_io_bs_init(bus_space_tag_t bs, void *cookie)
  {
  
  	*bs = i81342_bs_tag_template;
  	bs->bs_cookie = cookie;
  
  	bs->bs_map = i81342_io_bs_map;
  	bs->bs_unmap = i81342_io_bs_unmap;
  	bs->bs_alloc = i81342_io_bs_alloc;
  	bs->bs_free = i81342_io_bs_free;
  
  }
  
  void
  i81342_mem_bs_init(bus_space_tag_t bs, void *cookie)
  {
  
  	*bs = i81342_bs_tag_template;
  	bs->bs_cookie = cookie;
  
  	bs->bs_map = i81342_mem_bs_map;
  	bs->bs_unmap = i81342_mem_bs_unmap;
  	bs->bs_alloc = i81342_mem_bs_alloc;
  	bs->bs_free = i81342_mem_bs_free;
  
  }
  
  /* *** Routines shared by i81342, PCI IO, and PCI MEM. *** */
  
  int
  i81342_bs_subregion(void *t, bus_space_handle_t bsh, bus_size_t offset,
      bus_size_t size, bus_space_handle_t *nbshp)
  {
  
  	*nbshp = bsh + offset;
  	return (0);
  }
  
  void
  i81342_bs_barrier(void *t, bus_space_handle_t bsh, bus_size_t offset,
      bus_size_t len, int flags)
  {
  
  	/* Nothing to do. */
  }
  
  /* *** Routines for PCI IO. *** */
  
  int
  i81342_io_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
      bus_space_handle_t *bshp)
  {
  
  	*bshp = bpa;
  	return (0);
  }
  
  void
  i81342_io_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
  {
  
  	/* Nothing to do. */
  }
  
  int
  i81342_io_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
      bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
      bus_addr_t *bpap, bus_space_handle_t *bshp)
  {
  
  	panic("i81342_io_bs_alloc(): not implemented");
  }
  
  void    
  i81342_io_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
  {
  
  	panic("i81342_io_bs_free(): not implemented");
  }
  
  
  /* *** Routines for PCI MEM. *** */
  extern int badaddr_read(void *, int, void *);
  static vm_offset_t allocable = 0xe1000000;
  int
  i81342_mem_bs_map(void *t, bus_addr_t bpa, bus_size_t size, int flags,
      bus_space_handle_t *bshp)
  {
  	struct i81342_pci_softc *sc = (struct i81342_pci_softc *)t;
  	struct i81342_pci_map *tmp;
  	vm_offset_t addr, endaddr;
  	vm_paddr_t paddr;
  
  	/* Lookup to see if we already have a mapping at this address. */
  	tmp = sc->sc_pci_mappings;
  	while (tmp) {
  		if (tmp->paddr <= bpa && tmp->paddr + tmp->size >
  		    bpa + size) {
  			*bshp = bpa - tmp->paddr + tmp->vaddr;
  			return (0);
  		}
  		tmp = tmp->next;
  	}
  	addr = allocable;
  	endaddr = ((addr + size) &~ (0x1000000 - 1)) + 0x1000000;
  	if (endaddr >= IOP34X_VADDR)
  		panic("PCI virtual memory exhausted");
  	allocable = endaddr;
  	tmp = malloc(sizeof(*tmp), M_DEVBUF, M_WAITOK);
  	tmp->next = NULL;
  	paddr = bpa &~ (0x100000 - 1);
  	tmp->paddr = paddr;
  	tmp->vaddr = addr;
  	tmp->size = 0;
  	while (addr < endaddr) {
  		pmap_kenter_supersection(addr, paddr + (sc->sc_is_atux ?
  		    IOP34X_PCIX_OMBAR : IOP34X_PCIE_OMBAR), 0);
  		addr += 0x1000000;
  		paddr += 0x1000000;
  		tmp->size += 0x1000000;
  	}
  	tmp->next = sc->sc_pci_mappings;
  	sc->sc_pci_mappings = tmp;
  	*bshp = bpa - tmp->paddr + tmp->vaddr;
  	return (0);
  }
  
  void
  i81342_mem_bs_unmap(void *t, bus_space_handle_t h, bus_size_t size)
  {
  #if 0
  	vm_offset_t va, endva;
  
  	va = trunc_page((vm_offset_t)t);
  	endva = va + round_page(size);
  
  	/* Free the kernel virtual mapping. */
  	kmem_free(kernel_map, va, endva - va);
  #endif
  }
  
  int
  i81342_mem_bs_alloc(void *t, bus_addr_t rstart, bus_addr_t rend,
      bus_size_t size, bus_size_t alignment, bus_size_t boundary, int flags,
      bus_addr_t *bpap, bus_space_handle_t *bshp)
  {
  
  	panic("i81342_mem_bs_alloc(): not implemented");
  }
  
  void    
  i81342_mem_bs_free(void *t, bus_space_handle_t bsh, bus_size_t size)
  {
  
  	panic("i81342_mem_bs_free(): not implemented");
  }
  