/* $NetBSD: exec.c,v 1.6 2012/12/27 20:21:51 martin Exp $ */ /*- * Copyright (c) 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * 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. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)boot.c 8.1 (Berkeley) 6/10/93 */ #include <sys/cdefs.h> /* __FBSDID("$FreeBSD: src/sys/boot/ia64/libski/elf_freebsd.c,v 1.10 2004/04/05 23:41:28 imp Exp $"); */ #include <lib/libsa/stand.h> #include <lib/libsa/loadfile.h> #include <lib/libkern/libkern.h> #include <sys/param.h> #include <sys/lock.h> #include <machine/elf_machdep.h> #include <machine/bootinfo.h> #include <machine/ia64_cpu.h> #include <machine/vmparam.h> #include "bootstrap.h" #include "libski.h" #define _KERNEL static int elf64_exec(struct preloaded_file *amp); struct file_format ia64_elf = { elf64_loadfile, elf64_exec }; #define PTE_MA_WB 0 #define PTE_MA_UC 4 #define PTE_MA_UCE 5 #define PTE_MA_WC 6 #define PTE_MA_NATPAGE 7 #define PTE_PL_KERN 0 #define PTE_PL_USER 3 #define PTE_AR_R 0 #define PTE_AR_RX 1 #define PTE_AR_RW 2 #define PTE_AR_RWX 3 #define PTE_AR_R_RW 4 #define PTE_AR_RX_RWX 5 #define PTE_AR_RWX_RW 6 #define PTE_AR_X_RX 7 /* * A short-format VHPT entry. Also matches the TLB insertion format. */ struct ia64_pte { u_int64_t pte_p :1; /* bits 0..0 */ u_int64_t pte_rv1 :1; /* bits 1..1 */ u_int64_t pte_ma :3; /* bits 2..4 */ u_int64_t pte_a :1; /* bits 5..5 */ u_int64_t pte_d :1; /* bits 6..6 */ u_int64_t pte_pl :2; /* bits 7..8 */ u_int64_t pte_ar :3; /* bits 9..11 */ u_int64_t pte_ppn :38; /* bits 12..49 */ u_int64_t pte_rv2 :2; /* bits 50..51 */ u_int64_t pte_ed :1; /* bits 52..52 */ u_int64_t pte_ig :11; /* bits 53..63 */ }; struct bootinfo bootinfo; void enter_kernel(const char* filename, u_int64_t start, struct bootinfo *bi) { printf("Entering %s at 0x%lx...\n", filename, start); while (*filename == '/') filename++; ssc(0, (u_int64_t) filename, 0, 0, SSC_LOAD_SYMBOLS); __asm __volatile("mov cr.ipsr=%0" :: "r"(IA64_PSR_IC | IA64_PSR_DT | IA64_PSR_RT | IA64_PSR_IT | IA64_PSR_BN)); __asm __volatile("mov cr.iip=%0" :: "r"(start)); __asm __volatile("mov cr.ifs=r0;;"); __asm __volatile("mov r8=%0" :: "r" (bi)); __asm __volatile("rfi;;"); } static int elf64_exec(struct preloaded_file *fp) { struct ia64_pte pte; struct bootinfo *bi; if (strcmp(fp->f_type, ELF64_KERNELTYPE)) return(EFTYPE); /* * Ugly hack, similar to linux. Dump the bootinfo into a * special page reserved in the link map. */ bi = &bootinfo; memset(bi, 0, sizeof(struct bootinfo)); bi_load(bi, fp, ""); /* * Region 6 is direct mapped UC and region 7 is direct mapped * WC. The details of this is controlled by the Alt {I,D}TLB * handlers. Here we just make sure that they have the largest * possible page size to minimise TLB usage. */ ia64_set_rr(IA64_RR_BASE(6), (6 << 8) | (28 << 2)); ia64_set_rr(IA64_RR_BASE(7), (7 << 8) | (28 << 2)); memset(&pte, 0, sizeof(pte)); pte.pte_p = 1; pte.pte_ma = PTE_MA_WB; pte.pte_a = 1; pte.pte_d = 1; pte.pte_pl = PTE_PL_KERN; pte.pte_ar = PTE_AR_RWX; pte.pte_ppn = 0; __asm __volatile("mov cr.ifa=%0" :: "r"(IA64_RR_BASE(7))); __asm __volatile("mov cr.itir=%0" :: "r"(28 << 2)); __asm __volatile("srlz.i;;"); __asm __volatile("itr.i itr[%0]=%1;;" :: "r"(0), "r"(*(u_int64_t*)&pte)); __asm __volatile("srlz.i;;"); __asm __volatile("itr.d dtr[%0]=%1;;" :: "r"(0), "r"(*(u_int64_t*)&pte)); __asm __volatile("srlz.i;;"); enter_kernel(fp->f_name, fp->marks[MARK_ENTRY], bi); }
