1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 /* 26 * Copyright (c) 2010, Intel Corporation. 27 * All rights reserved. 28 */ 29 30 #ifndef _SYS_RM_PLATTER_H 31 #define _SYS_RM_PLATTER_H 32 33 #include <sys/types.h> 34 #include <sys/tss.h> 35 #include <sys/segments.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 #define RM_PLATTER_CODE_SIZE 0x400 42 #define RM_PLATTER_CPU_HALT_CODE_SIZE 0x100 43 44 typedef struct rm_platter { 45 char rm_code[RM_PLATTER_CODE_SIZE]; 46 char rm_cpu_halt_code[RM_PLATTER_CPU_HALT_CODE_SIZE]; 47 #if defined(__amd64) 48 /* 49 * The compiler will want to 64-bit align the 64-bit rm_gdt_base 50 * pointer, so we need to add an extra four bytes of padding here to 51 * make sure rm_gdt_lim and rm_gdt_base will align to create a proper 52 * ten byte GDT pseudo-descriptor. 53 */ 54 uint32_t rm_gdt_pad; 55 #endif /* __amd64 */ 56 ushort_t rm_debug; 57 ushort_t rm_gdt_lim; /* stuff for lgdt */ 58 user_desc_t *rm_gdt_base; 59 #if defined(__amd64) 60 /* 61 * The compiler will want to 64-bit align the 64-bit rm_idt_base 62 * pointer, so we need to add an extra four bytes of padding here to 63 * make sure rm_idt_lim and rm_idt_base will align to create a proper 64 * ten byte IDT pseudo-descriptor. 65 */ 66 uint32_t rm_idt_pad; 67 #endif /* __amd64 */ 68 ushort_t rm_cpu_halted; /* non-zero if CPU has been halted */ 69 ushort_t rm_idt_lim; /* stuff for lidt */ 70 gate_desc_t *rm_idt_base; 71 uint_t rm_pdbr; /* cr3 value */ 72 uint_t rm_cpu; /* easy way to know which CPU we are */ 73 uint_t rm_x86feature; /* X86 supported features */ 74 uint_t rm_cr4; /* cr4 value on cpu0 */ 75 #if defined(__amd64) 76 /* 77 * Temporary GDT for the brief transition from real mode to protected 78 * mode before a CPU continues on into long mode. 79 * 80 * Putting it here assures it will be located in identity mapped memory 81 * (va == pa, 1:1). 82 * 83 * rm_temp_gdt is sized to hold only a null descriptor in slot zero 84 * and a 64-bit code descriptor in slot one. 85 * 86 * rm_temp_[gi]dt_lim and rm_temp_[gi]dt_base are the pseudo-descriptors 87 * for the temporary GDT and IDT, respectively. 88 */ 89 uint64_t rm_temp_gdt[2]; 90 ushort_t rm_temp_gdtdesc_pad; /* filler to align GDT desc */ 91 ushort_t rm_temp_gdt_lim; 92 uint32_t rm_temp_gdt_base; 93 ushort_t rm_temp_idtdesc_pad; /* filler to align IDT desc */ 94 ushort_t rm_temp_idt_lim; 95 uint32_t rm_temp_idt_base; 96 97 /* 98 * The code executing in the rm_platter needs the offset into the 99 * platter at which the 64-bit code starts, so have mp_startup 100 * calculate it and store it here. 101 */ 102 uint32_t rm_longmode64_addr; 103 #endif /* __amd64 */ 104 } rm_platter_t; 105 106 /* 107 * cpu tables put within a single structure two of the tables which need to be 108 * allocated when a CPU starts up. 109 * 110 * Note: the tss should be 16 byte aligned for best performance on amd64 111 * Since DEFAULTSTKSIZE is a multiple of PAGESIZE tss will be aligned. 112 */ 113 struct cpu_tables { 114 char ct_stack[DEFAULTSTKSZ]; 115 struct tss ct_tss; 116 }; 117 118 /* 119 * gdt entries are 8 bytes long, ensure that we have an even no. of them. 120 */ 121 #if ((NGDT / 2) * 2 != NGDT) 122 #error "rm_platter.h: tss not properly aligned" 123 #endif 124 125 #ifdef __cplusplus 126 } 127 #endif 128 129 #endif /* _SYS_RM_PLATTER_H */ 130