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 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_RM_PLATTER_H 27 #define _SYS_RM_PLATTER_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/types.h> 32 #include <sys/tss.h> 33 #include <sys/segments.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 typedef struct rm_platter { 40 char rm_code[1024]; 41 #if defined(__amd64) 42 /* 43 * The compiler will want to 64-bit align the 64-bit rm_gdt_base 44 * pointer, so we need to add an extra four bytes of padding here to 45 * make sure rm_gdt_lim and rm_gdt_base will align to create a proper 46 * ten byte GDT pseudo-descriptor. 47 */ 48 uint32_t rm_gdt_pad; 49 #endif /* __amd64 */ 50 ushort_t rm_debug; 51 ushort_t rm_gdt_lim; /* stuff for lgdt */ 52 user_desc_t *rm_gdt_base; 53 #if defined(__amd64) 54 /* 55 * The compiler will want to 64-bit align the 64-bit rm_idt_base 56 * pointer, so we need to add an extra four bytes of padding here to 57 * make sure rm_idt_lim and rm_idt_base will align to create a proper 58 * ten byte IDT pseudo-descriptor. 59 */ 60 uint32_t rm_idt_pad; 61 #endif /* __amd64 */ 62 ushort_t rm_filler2; /* till I am sure that pragma works */ 63 ushort_t rm_idt_lim; /* stuff for lidt */ 64 gate_desc_t *rm_idt_base; 65 uint_t rm_pdbr; /* cr3 value */ 66 uint_t rm_cpu; /* easy way to know which CPU we are */ 67 uint_t rm_x86feature; /* X86 supported features */ 68 uint_t rm_cr4; /* cr4 value on cpu0 */ 69 #if defined(__amd64) 70 /* 71 * Temporary GDT for the brief transition from real mode to protected 72 * mode before a CPU continues on into long mode. 73 * 74 * Putting it here assures it will be located in identity mapped memory 75 * (va == pa, 1:1). 76 * 77 * rm_temp_gdt is sized to hold only a null descriptor in slot zero 78 * and a 64-bit code descriptor in slot one. 79 * 80 * rm_temp_[gi]dt_lim and rm_temp_[gi]dt_base are the pseudo-descriptors 81 * for the temporary GDT and IDT, respectively. 82 */ 83 uint64_t rm_temp_gdt[2]; 84 ushort_t rm_temp_gdtdesc_pad; /* filler to align GDT desc */ 85 ushort_t rm_temp_gdt_lim; 86 uint32_t rm_temp_gdt_base; 87 ushort_t rm_temp_idtdesc_pad; /* filler to align IDT desc */ 88 ushort_t rm_temp_idt_lim; 89 uint32_t rm_temp_idt_base; 90 91 /* 92 * The code executing in the rm_platter needs the offset into the 93 * platter at which the 64-bit code starts, so have mp_startup 94 * calculate it and store it here. 95 */ 96 uint32_t rm_longmode64_addr; 97 #endif /* __amd64 */ 98 } rm_platter_t; 99 100 /* 101 * cpu tables put within a single structure all the tables which need to be 102 * allocated when a CPU starts up. Makes it more memory efficient and easier 103 * to allocate/release 104 * 105 * Note: gdt and tss should be 16 byte aligned for best performance on 106 * amd64. Since DEFAULTSTKSIZE is a multiple of pagesize gdt will be aligned. 107 * We test below that the tss is properly aligned. 108 */ 109 110 struct cpu_tables { 111 char ct_stack[DEFAULTSTKSZ]; 112 user_desc_t *ct_gdt; 113 struct tss ct_tss; 114 }; 115 116 /* 117 * gdt entries are 8 bytes long, ensure that we have an even no. of them. 118 */ 119 #if ((NGDT / 2) * 2 != NGDT) 120 #error "rm_platter.h: tss not properly aligned" 121 #endif 122 123 #ifdef __cplusplus 124 } 125 #endif 126 127 #endif /* _SYS_RM_PLATTER_H */ 128