1*5d9d9091SRichard Lowe/* 2*5d9d9091SRichard Lowe * CDDL HEADER START 3*5d9d9091SRichard Lowe * 4*5d9d9091SRichard Lowe * The contents of this file are subject to the terms of the 5*5d9d9091SRichard Lowe * Common Development and Distribution License (the "License"). 6*5d9d9091SRichard Lowe * You may not use this file except in compliance with the License. 7*5d9d9091SRichard Lowe * 8*5d9d9091SRichard Lowe * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5d9d9091SRichard Lowe * or http://www.opensolaris.org/os/licensing. 10*5d9d9091SRichard Lowe * See the License for the specific language governing permissions 11*5d9d9091SRichard Lowe * and limitations under the License. 12*5d9d9091SRichard Lowe * 13*5d9d9091SRichard Lowe * When distributing Covered Code, include this CDDL HEADER in each 14*5d9d9091SRichard Lowe * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5d9d9091SRichard Lowe * If applicable, add the following below this CDDL HEADER, with the 16*5d9d9091SRichard Lowe * fields enclosed by brackets "[]" replaced with your own identifying 17*5d9d9091SRichard Lowe * information: Portions Copyright [yyyy] [name of copyright owner] 18*5d9d9091SRichard Lowe * 19*5d9d9091SRichard Lowe * CDDL HEADER END 20*5d9d9091SRichard Lowe */ 21*5d9d9091SRichard Lowe 22*5d9d9091SRichard Lowe/* 23*5d9d9091SRichard Lowe * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24*5d9d9091SRichard Lowe * Use is subject to license terms. 25*5d9d9091SRichard Lowe */ 26*5d9d9091SRichard Lowe 27*5d9d9091SRichard Lowe#include <sys/asm_linkage.h> 28*5d9d9091SRichard Lowe#include <sys/asm_misc.h> 29*5d9d9091SRichard Lowe#include "dboot_xboot.h" 30*5d9d9091SRichard Lowe 31*5d9d9091SRichard Lowe#if defined(__amd64) 32*5d9d9091SRichard Lowe ENTRY_NP(_start) 33*5d9d9091SRichard Lowe /* 34*5d9d9091SRichard Lowe * At entry we are passed a (start_info_t *) in %rsi. 35*5d9d9091SRichard Lowe */ 36*5d9d9091SRichard Lowe movq %rsi, xen_info(%rip) 37*5d9d9091SRichard Lowe 38*5d9d9091SRichard Lowe /* 39*5d9d9091SRichard Lowe * make sure we have sane processor state 40*5d9d9091SRichard Lowe */ 41*5d9d9091SRichard Lowe xorw %ax, %ax 42*5d9d9091SRichard Lowe movw %ax, %fs 43*5d9d9091SRichard Lowe movw %ax, %gs 44*5d9d9091SRichard Lowe pushq $0 45*5d9d9091SRichard Lowe popfq 46*5d9d9091SRichard Lowe pushq $0 47*5d9d9091SRichard Lowe 48*5d9d9091SRichard Lowe /* 49*5d9d9091SRichard Lowe * go off and unpack the kernel bits, adjust page tables, etc. 50*5d9d9091SRichard Lowe */ 51*5d9d9091SRichard Lowe call startup_kernel 52*5d9d9091SRichard Lowe 53*5d9d9091SRichard Lowe /* 54*5d9d9091SRichard Lowe * we can only setup a stack after startup_kernel(). 55*5d9d9091SRichard Lowe * Its in the lower part of memroy. 56*5d9d9091SRichard Lowe */ 57*5d9d9091SRichard Lowe leaq stack_space(%rip), %rsp 58*5d9d9091SRichard Lowe addq $STACK_SIZE, %rsp 59*5d9d9091SRichard Lowe andl $0xfffffff0, %esp 60*5d9d9091SRichard Lowe 61*5d9d9091SRichard Lowe pushq $0x0 /* push a dead-end frame */ 62*5d9d9091SRichard Lowe pushq $0x0 63*5d9d9091SRichard Lowe movq %rsp, %rbp 64*5d9d9091SRichard Lowe 65*5d9d9091SRichard Lowe /* 66*5d9d9091SRichard Lowe * when we get back, load the kernel entry point and jump to it 67*5d9d9091SRichard Lowe * The address of the xboot_info is the kernel's only argument. 68*5d9d9091SRichard Lowe */ 69*5d9d9091SRichard Lowe movl entry_addr_low, %esi 70*5d9d9091SRichard Lowe movq $0xffffffff00000000,%rdx 71*5d9d9091SRichard Lowe orq %rdx, %rsi /* set upper bits of entry addr */ 72*5d9d9091SRichard Lowe 73*5d9d9091SRichard Lowe movl bi, %edi 74*5d9d9091SRichard Lowe call *%rsi 75*5d9d9091SRichard Lowe SET_SIZE(_start) 76*5d9d9091SRichard Lowe 77*5d9d9091SRichard Lowe#elif defined(__i386) 78*5d9d9091SRichard Lowe ENTRY_NP(_start) 79*5d9d9091SRichard Lowe /* 80*5d9d9091SRichard Lowe * At entry we are passed a (start_info_t *) in %esi. 81*5d9d9091SRichard Lowe */ 82*5d9d9091SRichard Lowe movl %esi, xen_info 83*5d9d9091SRichard Lowe 84*5d9d9091SRichard Lowe /* 85*5d9d9091SRichard Lowe * make sure we have sane processor state 86*5d9d9091SRichard Lowe */ 87*5d9d9091SRichard Lowe cld 88*5d9d9091SRichard Lowe xorw %ax, %ax 89*5d9d9091SRichard Lowe movw %ax, %fs 90*5d9d9091SRichard Lowe movw %ax, %gs 91*5d9d9091SRichard Lowe 92*5d9d9091SRichard Lowe 93*5d9d9091SRichard Lowe /* 94*5d9d9091SRichard Lowe * go off and unpack the kernel bits, adjust page tables, etc. 95*5d9d9091SRichard Lowe */ 96*5d9d9091SRichard Lowe call startup_kernel 97*5d9d9091SRichard Lowe 98*5d9d9091SRichard Lowe /* 99*5d9d9091SRichard Lowe * we can only setup a stack after startup_kernel(). 100*5d9d9091SRichard Lowe */ 101*5d9d9091SRichard Lowe movl $stack_space, %esp /* load my stack pointer */ 102*5d9d9091SRichard Lowe addl $STACK_SIZE, %esp 103*5d9d9091SRichard Lowe 104*5d9d9091SRichard Lowe pushl $0x0 /* push a dead-end frame */ 105*5d9d9091SRichard Lowe pushl $0x0 106*5d9d9091SRichard Lowe movl %esp, %ebp 107*5d9d9091SRichard Lowe 108*5d9d9091SRichard Lowe /* 109*5d9d9091SRichard Lowe * when we get back, load the kernel entry point and jump to it 110*5d9d9091SRichard Lowe * The address of the xboot_info is the kernel's only argument. 111*5d9d9091SRichard Lowe */ 112*5d9d9091SRichard Lowe movl entry_addr_low, %esi 113*5d9d9091SRichard Lowe movl bi, %eax 114*5d9d9091SRichard Lowe pushl %eax 115*5d9d9091SRichard Lowe call *%esi 116*5d9d9091SRichard Lowe SET_SIZE(_start) 117*5d9d9091SRichard Lowe#endif /* __i386 */ 118