From c405ba08ed6f59bc935233d61bcc72906825f822 Mon Sep 17 00:00:00 2001 From: phcoder Date: Sun, 3 May 2009 10:14:19 +0000 Subject: [PATCH] missing files from previous commit --- loader/i386/bsd_helper.S | 45 +++++++++++++ loader/i386/bsd_pagetable.c | 88 +++++++++++++++++++++++++ loader/i386/bsd_trampoline.S | 124 +++++++++++++++++++++++++++++++++++ 3 files changed, 257 insertions(+) create mode 100644 loader/i386/bsd_helper.S create mode 100644 loader/i386/bsd_pagetable.c create mode 100644 loader/i386/bsd_trampoline.S diff --git a/loader/i386/bsd_helper.S b/loader/i386/bsd_helper.S new file mode 100644 index 000000000..23c86109c --- /dev/null +++ b/loader/i386/bsd_helper.S @@ -0,0 +1,45 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 1999,2000,2001,2002,2003,2005,2006,2007,2008, 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +#include + + .p2align 2 + + + .code32 + +/* + * Use cdecl calling convention for *BSD kernels. + */ + +FUNCTION(grub_unix_real_boot) + + /* Interrupts should be disabled. */ + cli + + /* Discard `grub_unix_real_boot' return address. */ + popl %eax + + /* Fetch `entry' address ... */ + popl %eax + + /* + * ... and put our return address in its place. The kernel will + * ignore it, but it expects %esp to point to it. + */ + call *%eax diff --git a/loader/i386/bsd_pagetable.c b/loader/i386/bsd_pagetable.c new file mode 100644 index 000000000..754f6f072 --- /dev/null +++ b/loader/i386/bsd_pagetable.c @@ -0,0 +1,88 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (c) 1998 Michael Smith + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +/* Based on the code from FreeBSD originally distributed under the + following terms: */ + +/*- + * Copyright (c) 1998 Michael Smith + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + + +static void +fill_bsd64_pagetable (grub_uint8_t *target) +{ + grub_uint64_t *pt2, *pt3, *pt4; + int i; + +#define PG_V 0x001 +#define PG_RW 0x002 +#define PG_U 0x004 +#define PG_PS 0x080 + + pt4 = (grub_uint64_t *) target; + pt3 = (grub_uint64_t *) (target + 4096); + pt2 = (grub_uint64_t *) (target + 8192); + + grub_memset ((char *) target, 0, 4096 * 3); + + /* + * This is kinda brutal, but every single 1GB VM memory segment points to + * the same first 1GB of physical memory. But it is how BSD expects + * it to be. + */ + for (i = 0; i < 512; i++) + { + /* Each slot of the level 4 pages points to the same level 3 page */ + pt4[i] = (grub_addr_t) &pt3[0]; + pt4[i] |= PG_V | PG_RW | PG_U; + + /* Each slot of the level 3 pages points to the same level 2 page */ + pt3[i] = (grub_addr_t) &pt2[0]; + pt3[i] |= PG_V | PG_RW | PG_U; + + /* The level 2 page slots are mapped with 2MB pages for 1GB. */ + pt2[i] = i * (2 * 1024 * 1024); + pt2[i] |= PG_V | PG_RW | PG_PS | PG_U; + } +} diff --git a/loader/i386/bsd_trampoline.S b/loader/i386/bsd_trampoline.S new file mode 100644 index 000000000..f6bfe2c44 --- /dev/null +++ b/loader/i386/bsd_trampoline.S @@ -0,0 +1,124 @@ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (c) 2003 Peter Wemm + * Copyright (C) 2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see . + */ + +/* Based on the code from FreeBSD originally distributed under the + following terms: */ + +/*- + * Copyright (c) 2003 Peter Wemm + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + + +#define MSR_EFER 0xc0000080 +#define EFER_LME 0x00000100 +#define CR4_PAE 0x00000020 +#define CR4_PSE 0x00000010 +#define CR0_PG 0x80000000 + +#include + + .p2align 2 + + .code32 + + +VARIABLE(grub_bsd64_trampoline_start) + + /* Discard `grub_unix_real_boot' return address. */ + popl %eax + + /* entry */ + popl %edi + + /* entry_hi */ + popl %esi + + cli + + /* Turn on EFER.LME. */ + movl $MSR_EFER, %ecx + rdmsr + orl $EFER_LME, %eax + wrmsr + + /* Turn on PAE. */ + movl %cr4, %eax + orl $(CR4_PAE | CR4_PSE), %eax + movl %eax, %cr4 + + /* Set %cr3 for PT4. */ + popl %eax + movl %eax, %cr3 + + /* Push a dummy return address. */ + pushl %eax + + /* Turn on paging (implicitly sets EFER.LMA). */ + movl %cr0, %eax + orl $CR0_PG, %eax + movl %eax, %cr0 + + /* Now we're in compatability mode. set %cs for long mode. */ + /* lgdt */ + .byte 0x0f + .byte 0x01 + .byte 0x15 +VARIABLE (grub_bsd64_trampoline_gdt) + .long 0x0 + + /* ljmp */ + .byte 0xea +VARIABLE (grub_bsd64_trampoline_selfjump) + .long 0x0 + .word 0x08 + + .code64 + +bsd64_longmode: + /* We're still running V=P, jump to entry point. */ + movl %esi, %eax + salq $32, %rax + orq %rdi, %rax + pushq %rax + ret +VARIABLE(grub_bsd64_trampoline_end)