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684 jermar 1 
/*
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 * Copyright (C) 2006 Jakub Jermar
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 * Copyright (C) 2006 Jakub Vana
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - 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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 * - 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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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <arch/mm/page.h>
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#include <genarch/mm/page_ht.h>
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#include <mm/asid.h>
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#include <arch/types.h>
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#include <print.h>
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#include <mm/page.h>
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#include <mm/frame.h>
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#include <config.h>
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#include <panic.h>
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#include <arch/asm.h>
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#include <arch/barrier.h>
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/** Initialize VHPT and region registers. */
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static void set_vhpt_environment(void)
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{
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	region_register rr;
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	pta_register pta;
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	int i;
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	/*
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	 * First set up kernel region register.
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	 */
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	rr.word = rr_read(VRN_KERNEL);
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	rr.map.ve = 0;                  /* disable VHPT walker */
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	rr.map.ps = PAGE_WIDTH;
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	rr.map.rid = ASID_KERNEL;
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	rr_write(VRN_KERNEL, rr.word);
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	srlz_i();
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	srlz_d();
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	/*
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	 * And invalidate the rest of region register.
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	 */
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	for(i = 0; i < REGION_REGISTERS; i++) {
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		/* skip kernel rr */
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		if (i == VRN_KERNEL)
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			continue;
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		rr.word == rr_read(i);
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		rr.map.rid = ASID_INVALID;
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		rr_write(i, rr.word);
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		srlz_i();
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		srlz_d();
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	}
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	/*
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	 * Allocate VHPT and invalidate all its entries.
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	 */
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	page_ht = (pte_t *) frame_alloc(FRAME_KA, VHPT_WIDTH - FRAME_WIDTH, NULL);
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	ht_invalidate_all();
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	/*
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	 * Set up PTA register.
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	 */
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	pta.word = pta_read();
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	pta.map.ve = 0;                   /* disable VHPT walker */
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	pta.map.vf = 1;                   /* large entry format */
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	pta.map.size = VHPT_WIDTH;
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	pta.map.base = (__address) page_ht;
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	pta_write(pta.word);
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	srlz_i();
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	srlz_d();
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}
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/** Initialize ia64 virtual address translation subsystem. */
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void page_arch_init(void)
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{
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	page_operations = &page_ht_operations;
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	pk_disable();
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	set_vhpt_environment();
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}