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, ®stub, &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} 78