1 2/* 3 * This file and its contents are supplied under the terms of the 4 * Common Development and Distribution License ("CDDL"), version 1.0. 5 * You may only use this file in accordance with the terms of version 6 * 1.0 of the CDDL. 7 * 8 * A full copy of the text of the CDDL should have accompanied this 9 * source. A copy of the CDDL is also available via the Internet at 10 * http://www.illumos.org/license/CDDL. 11 */ 12 13/* 14 * Copyright 2016 Joyent, Inc. 15 */ 16 17#include <sys/asm_linkage.h> 18#include <sys/asm_misc.h> 19#include <sys/param.h> 20#include <sys/comm_page.h> 21#include <sys/tsc.h> 22 23#if defined(_GENCTF) || defined(__lint) 24 25hrtime_t tsc_last; 26hrtime_t tsc_resume_cap; 27hrtime_t tsc_hrtime_base; 28uint32_t tsc_max_delta; 29volatile uint32_t hres_lock; 30uint32_t tsc_type; 31uint32_t nsec_scale; 32int64_t hrestime_adj; 33hrtime_t hres_last_tick; 34uint32_t tsc_ncpu; 35volatile timestruc_t hrestime; 36hrtime_t tsc_sync_tick_delta[NCPU]; 37 38comm_page_t comm_page; 39 40#else /* defined(_GENCTF) || defined(__lint) */ 41 42#include "assym.h" 43 44/* 45 * x86 Comm Page 46 * 47 * This is the definition for the comm page on x86. The purpose of this struct 48 * is to consolidate certain pieces of kernel state into one contiguous section 49 * of memory in order for it to be exposed (read-only) to userspace. The 50 * struct contents are defined by hand so that member variables will maintain 51 * their original symbols for use throughout the rest of the kernel. This 52 * layout must exactly match the C definition of comm_page_t. 53 * See: "uts/i86pc/sys/comm_page.h" 54 */ 55 56 .data 57 DGDEF3(comm_page, COMM_PAGE_S_SIZE, 4096) 58 DGDEF2(tsc_last, 8) 59 .fill 1, 8, 0 60 DGDEF2(tsc_hrtime_base, 8) 61 .fill 1, 8, 0 62 DGDEF2(tsc_resume_cap, 8) 63 .fill 1, 8, 0 64 DGDEF2(tsc_type, 4); 65 .fill 1, 4, _CONST(TSC_RDTSC_CPUID) 66 DGDEF2(tsc_max_delta, 4); 67 .fill 1, 4, 0 68 DGDEF2(hres_lock, 4); 69 .fill 1, 4, 0 70 DGDEF2(nsec_scale, 4); 71 .fill 1, 4, 0 72 DGDEF2(hrestime_adj, 8) 73 .fill 1, 8, 0 74 DGDEF2(hres_last_tick, 8) 75 .fill 1, 8, 0 76 DGDEF2(tsc_ncpu, 4) 77 .fill 1, 4, 0 78 /* _cp_pad */ 79 .fill 1, 4, 0 80 DGDEF2(hrestime, _MUL(2, 8)) 81 .fill 2, 8, 0 82 DGDEF2(tsc_sync_tick_delta, _MUL(NCPU, 8)) 83 .fill _CONST(NCPU), 8, 0 84 85 /* pad out the rest of the page from the struct end */ 86 .fill _CONST(COMM_PAGE_SIZE - COMM_PAGE_S_SIZE), 1, 0 87 88#endif /* defined(_GENCTF) || defined(__lint) */ 89