/*- * Copyright (c) Peter Wemm <peter@netplex.com.au> * Copyright (c) 2008 The DragonFly Project. * 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. * * Only machine-dependant code should ever include this file. MI * code and header files do NOT include this file. e.g. sys/globaldata.h * should not include this file. * * $FreeBSD: src/sys/i386/include/globaldata.h,v 1.11.2.1 2000/05/16 06:58:10 dillon Exp $ */ #ifndef _MACHINE_GLOBALDATA_H_ #define _MACHINE_GLOBALDATA_H_ #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) #ifndef _SYS_GLOBALDATA_H_ #include <sys/globaldata.h> /* struct globaldata */ #endif #ifndef _SYS_THREAD_H_ #include <sys/thread.h> /* struct thread */ #endif #include <machine/segments.h> /* struct user_segment_descriptor */ #include <machine/tss.h> /* struct x86_64tss */ #include <machine/npx.h> struct pv_entry; /* * Note on interrupt control. Pending interrupts not yet dispatched are * marked in gd_fpending or gd_spending. Once dispatched the interrupt's * pending bit is cleared and the interrupt is masked. Upon completion * the interrupt is unmasked. * * For edge triggered interrupts interrupts may be enabled again at this * point and if they occur before the interrupt service routine is complete * the service routine will loop. * * The current thread's cpl is stored in the thread structure. * * Note: the embedded globaldata and/or the mdglobaldata structure * may exceed the size of a page. */ struct mdglobaldata { struct globaldata mi; struct user_segment_descriptor gd_common_tssd; struct user_segment_descriptor *gd_tss_gdt; /* gd_gdt[GPROC0_SEL] */ struct thread *gd_npxthread; union savefpu gd_savefpu; /* fast bcopy/zero temp fpu save area */ union savefpu gd_zerofpu; /* xrstor/fxrstor/frstor zero regs */ int gd_fpu_lock; /* fast bcopy/zero cpu lock */ int gd_xinvaltlb; /* reentrancy check invaltlb routine */ int gd_unused001; int gd_spending; /* software interrupt pending */ int gd_sdelayed; /* delayed software ints */ int gd_currentldt; int gd_private_tss; u_int gd_unused002; u_int gd_unused003; u_int gd_ss_eflags; struct user_segment_descriptor *gd_gdt; /* pcpu gdt[] table */ long gd_lunused1; long gd_lunused2; long gd_lunusde3; caddr_t gd_aunused0; caddr_t gd_aunused1; caddr_t gd_aunused2; struct pv_entry *gd_newpv; u_int gd_acpi_id; u_int gd_apic_id; register_t gd_unused004; register_t gd_unused005; register_t gd_user_fs; /* current user fs in MSR */ register_t gd_user_gs; /* current user gs in MSR */ cpumask_t gd_unused006; u_long gd_ipending[3]; }; #define MDGLOBALDATA_BASEALLOC_SIZE \ ((sizeof(struct mdglobaldata) + PAGE_MASK) & ~PAGE_MASK) #define MDGLOBALDATA_BASEALLOC_PAGES \ (MDGLOBALDATA_BASEALLOC_SIZE / PAGE_SIZE) #define MDGLOBALDATA_PAD \ (MDGLOBALDATA_BASEALLOC_SIZE - sizeof(struct mdglobaldata)) /* * This is the upper (0xff800000) address space layout that is per-cpu. * It is setup in locore.s and pmap.c for the BSP and in mp_machdep.c for * each AP. genassym helps export this to the assembler code. * * Most of the major elements in struct privatespace must be * PAGE_SIZE aligned. */ struct privatespace { /* * page 0 - data page */ struct mdglobaldata mdglobaldata; char __filler0[MDGLOBALDATA_PAD]; /* * page 1 - Unused (unmapped) */ char unused2[PAGE_SIZE]; /* * page 2 - Trampoline page. Put the trampoline and common_tss * in the same page to make them easier to isolate * from the rest of the kernel map. See x86_64/pmap.c * * rsp0 points into trampoline. Interrupts are always * disabled for this case but leave reserved1[] * reserved just in case. */ char reserved1[PAGE_SIZE - sizeof(struct trampframe) - sizeof(uint64_t) - sizeof(struct x86_64tss)]; struct trampframe trampoline; uint64_t reserved1b; /* 16-byte-align trampoline */ struct x86_64tss common_tss; /* (misaligned by 8 bytes) */ /* * page 3, 4 - NMI, Double fault stack * page 5, 6 - Debug fault stack */ char dblstack[PAGE_SIZE * 2 - sizeof(struct trampframe)]; struct trampframe dbltramp; char dbgstack[PAGE_SIZE * 2 - sizeof(struct trampframe)]; struct trampframe dbgtramp; /* page 7+ - idle stack (UPAGES pages) */ char idlestack[UPAGES * PAGE_SIZE]; } __packed; #define mdcpu ((struct mdglobaldata *)_get_mycpu()) #define pscpu ((struct privatespace *)_get_mycpu()) #endif #ifdef _KERNEL extern struct privatespace *CPU_prvspace[]; #endif #endif
