176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman/* ----------------------------------------------------------------------- *
276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *
376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   Copyright 2007-2009 H. Peter Anvin - All Rights Reserved
476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   Copyright 2009 Intel Corporation; author: H. Peter Anvin
576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *
676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   Permission is hereby granted, free of charge, to any person
776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   obtaining a copy of this software and associated documentation
876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   files (the "Software"), to deal in the Software without
976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   restriction, including without limitation the rights to use,
1076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   copy, modify, merge, publish, distribute, sublicense, and/or
1176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   sell copies of the Software, and to permit persons to whom
1276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   the Software is furnished to do so, subject to the following
1376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   conditions:
1476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *
1576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   The above copyright notice and this permission notice shall
1676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   be included in all copies or substantial portions of the Software.
1776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *
1876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
1976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
2076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
2176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
2276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
2376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
2476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
2576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *   OTHER DEALINGS IN THE SOFTWARE.
2676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *
2776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * ----------------------------------------------------------------------- */
2876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
2976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman/*
3076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * shuffle_pm.c
3176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman *
3276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman * Shuffle and boot to protected mode code
3376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman */
3476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
3576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman#include <inttypes.h>
3676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman#include <syslinux/movebits.h>
3776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman#include <syslinux/bootpm.h>
3876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
3976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartmanint syslinux_shuffle_boot_pm(struct syslinux_movelist *fraglist,
4076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman			     struct syslinux_memmap *memmap,
4176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman			     uint16_t bootflags, struct syslinux_pm_regs *regs)
4276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman{
4376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    uint8_t handoff_code[9 * 5], *p;
4476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    const uint32_t *rp;
4576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    int i, rv;
4676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    struct syslinux_memmap *tmap;
4776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    addr_t regstub, stublen;
4876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
4976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    tmap = syslinux_target_memmap(fraglist, memmap);
5076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    if (!tmap)
5176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman	return -1;
5276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
5376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    regstub = 0x800;		/* Locate anywhere above this point */
5476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    stublen = sizeof handoff_code;
5576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    rv = syslinux_memmap_find_type(tmap, SMT_FREE, &regstub, &stublen, 1);
5676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    syslinux_free_memmap(tmap);
5776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    if (rv)
5876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman	return -1;
5976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
6076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    /* Build register-setting stub */
6176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    p = handoff_code;
6276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    rp = (const uint32_t *)regs;
6376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    for (i = 0; i < 8; i++) {
6476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman	*p = 0xb8 + i;		/* MOV gpr,imm32 */
6576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman	*(uint32_t *) (p + 1) = *rp++;
6676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman	p += 5;
6776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    }
6876d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    *p = 0xe9;			/* JMP */
6976d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    *(uint32_t *) (p + 1) = regs->eip - regstub - sizeof handoff_code;
7076d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
7176d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    /* Add register-setting stub to shuffle list */
7276d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    if (syslinux_add_movelist(&fraglist, regstub, (addr_t) handoff_code,
7376d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman			      sizeof handoff_code))
7476d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman	return -1;
7576d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman
7676d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman    return syslinux_do_shuffle(fraglist, memmap, regstub, 1, bootflags);
7776d05dc695b06c4e987bb8078f78032441e1430cGreg Hartman}
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