1ca987d46SWarner Losh/*- 2ca987d46SWarner Losh * Copyright (c) 2013 The FreeBSD Foundation 3ca987d46SWarner Losh * 4ca987d46SWarner Losh * This software was developed by Benno Rice under sponsorship from 5ca987d46SWarner Losh * the FreeBSD Foundation. 6ca987d46SWarner Losh * Redistribution and use in source and binary forms, with or without 7ca987d46SWarner Losh * modification, are permitted provided that the following conditions 8ca987d46SWarner Losh * are met: 9ca987d46SWarner Losh * 1. Redistributions of source code must retain the above copyright 10ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer. 11ca987d46SWarner Losh * 2. Redistributions in binary form must reproduce the above copyright 12ca987d46SWarner Losh * notice, this list of conditions and the following disclaimer in the 13ca987d46SWarner Losh * documentation and/or other materials provided with the distribution. 14ca987d46SWarner Losh * 15ca987d46SWarner Losh * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16ca987d46SWarner Losh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17ca987d46SWarner Losh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18ca987d46SWarner Losh * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19ca987d46SWarner Losh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20ca987d46SWarner Losh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21ca987d46SWarner Losh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22ca987d46SWarner Losh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23ca987d46SWarner Losh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24ca987d46SWarner Losh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25ca987d46SWarner Losh * SUCH DAMAGE. 26ca987d46SWarner Losh */ 27ca987d46SWarner Losh 28ca987d46SWarner Losh#include <machine/asmacros.h> 29ca987d46SWarner Losh 30adda2797SRoger Pau Monné#define ASM_FILE 31adda2797SRoger Pau Monné#include "multiboot2.h" 32adda2797SRoger Pau Monné 33ca987d46SWarner Losh .text 34ca987d46SWarner Losh .globl amd64_tramp 35ca987d46SWarner Losh 36ca987d46SWarner Losh/* 37ca987d46SWarner Losh * void amd64_tramp(uint64_t stack, void *copy_finish, uint64_t kernend, 38ca987d46SWarner Losh * uint64_t modulep, uint64_t pagetable, uint64_t entry) 39ca987d46SWarner Losh */ 40ca987d46SWarner Loshamd64_tramp: 41ca987d46SWarner Losh cli /* Make sure we don't get interrupted. */ 42ca987d46SWarner Losh movq %rdi,%rsp /* Switch to our temporary stack. */ 43ca987d46SWarner Losh 44ca987d46SWarner Losh movq %rdx,%r12 /* Stash the kernel values for later. */ 45ca987d46SWarner Losh movq %rcx,%r13 46ca987d46SWarner Losh movq %r8,%r14 47ca987d46SWarner Losh movq %r9,%r15 48ca987d46SWarner Losh 49ca987d46SWarner Losh callq *%rsi /* Call copy_finish so we're all ready to go. */ 50ca987d46SWarner Losh 51ca987d46SWarner Losh pushq %r12 /* Push kernend. */ 52ca987d46SWarner Losh salq $32,%r13 /* Shift modulep and push it. */ 53ca987d46SWarner Losh pushq %r13 54ca987d46SWarner Losh pushq %r15 /* Push the entry address. */ 55ca987d46SWarner Losh movq %r14,%cr3 /* Switch page tables. */ 56ca987d46SWarner Losh ret /* "Return" to kernel entry. */ 57ca987d46SWarner Losh 58ca987d46SWarner Losh ALIGN_TEXT 59ca987d46SWarner Loshamd64_tramp_end: 60ca987d46SWarner Losh 61adda2797SRoger Pau Monné/* void multiboot2_exec(uint64_t entry, uint64_t multiboot_info, uint64_t stack) */ 62adda2797SRoger Pau Monné .globl multiboot2_exec 63adda2797SRoger Pau Monnémultiboot2_exec: 64adda2797SRoger Pau Monné movq %rdx,%rsp 65adda2797SRoger Pau Monné pushq %rdi 66adda2797SRoger Pau Monné movq %rsi,%rbx 67adda2797SRoger Pau Monné movq $MULTIBOOT2_BOOTLOADER_MAGIC,%rax 68adda2797SRoger Pau Monné ret 69adda2797SRoger Pau Monné 70ca987d46SWarner Losh .data 71ca987d46SWarner Losh .globl amd64_tramp_size 72ca987d46SWarner Loshamd64_tramp_size: 73ca987d46SWarner Losh .long amd64_tramp_end-amd64_tramp 74