mirror of
https://codeberg.org/ziglang/zig.git
synced 2026-05-03 16:22:55 +03:00
Alex Rønne Petersen
66d97267c7
This excludes all headers in /usr/include/dev because that directory is bonkers huge (18M). We can add these on an as-needed basis.
67 lines
2.3 KiB
C
Vendored
67 lines
2.3 KiB
C
Vendored
/* $OpenBSD: cpu_full.h,v 1.3 2018/06/22 13:21:14 bluhm Exp $ */
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/*
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* Copyright (c) 2018 Philip Guenther <guenther@openbsd.org>
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* Copyright (c) 2018 Hans-Joerg Hoexer <hshoexer@genua.de>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _MACHINE_CPU_FULL_H_
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#define _MACHINE_CPU_FULL_H_
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#include <sys/param.h> /* offsetof, PAGE_SIZE */
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#include <machine/segments.h>
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#include <machine/tss.h>
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struct cpu_info_full {
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/* page mapped kRO in u-k */
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union {
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struct {
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struct i386tss uu_tss;
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struct i386tss uu_nmi_tss;
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union descriptor uu_gdt[NGDT];
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} u_tssgdt;
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char u_align[PAGE_SIZE];
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} cif_TSS_RO;
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#define cif_tss cif_TSS_RO.u_tssgdt.uu_tss
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#define cif_nmi_tss cif_TSS_RO.u_tssgdt.uu_nmi_tss
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#define cif_gdt cif_TSS_RO.u_tssgdt.uu_gdt
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/* start of page mapped kRW in u-k */
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uint32_t cif_tramp_stack[(PAGE_SIZE / 4
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- offsetof(struct cpu_info, ci_PAGEALIGN)) / sizeof(uint32_t)];
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uint32_t cif_nmi_stack[(3 * PAGE_SIZE / 4) / sizeof(uint32_t)];
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/*
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* Beginning of this hangs over into the kRW page; rest is
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* unmapped in u-k
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*/
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struct cpu_info cif_cpu;
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} __aligned(PAGE_SIZE);
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/* tss, align shim, and gdt must fit in a page */
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CTASSERT(_ALIGN(2 * sizeof(struct i386tss)) +
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sizeof(struct segment_descriptor) * NGDT < PAGE_SIZE);
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/* verify expected alignment */
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CTASSERT(offsetof(struct cpu_info_full, cif_cpu.ci_PAGEALIGN) % PAGE_SIZE == 0);
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/* verify total size is multiple of page size */
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CTASSERT(sizeof(struct cpu_info_full) % PAGE_SIZE == 0);
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extern struct cpu_info_full cpu_info_full_primary;
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/* Now make sure the cpu_info_primary macro is correct */
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CTASSERT(&cpu_info_primary - &cpu_info_full_primary.cif_cpu == 0);
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#endif /* _MACHINE_CPU_FULL_H_ */ |