1e69553ed1
e820 memory map is fetched using a hypercall under Xen PVH, so add a hook to init_ops in oder to diverge from bare metal and implement a Xen variant. Approved by: gibbs Sponsored by: Citrix Systems R&D x86/include/init.h: - Add a parse_memmap hook to init_ops, that will be called to fetch and parse the memory map. amd64/amd64/machdep.c: - Decouple the fetch and the parse of the memmap, so the parse function can be shared with Xen code. - Move code around in order to implement the parse_memmap hook. amd64/include/pc/bios.h: - Declare bios_add_smap_entries (implemented in machdep.c). x86/xen/pv.c: - Implement fetching of e820 memmap when running as a PVH guest by using the XENMEM_memory_map hypercall.
114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/*-
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* Copyright (c) 1997 Michael Smith
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* Copyright (c) 1998 Jonathan Lemon
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PC_BIOS_H_
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#define _MACHINE_PC_BIOS_H_
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/*
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* Int 15:E820 'SMAP' structure
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*/
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#define SMAP_SIG 0x534D4150 /* 'SMAP' */
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#define SMAP_TYPE_MEMORY 1
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#define SMAP_TYPE_RESERVED 2
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#define SMAP_TYPE_ACPI_RECLAIM 3
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#define SMAP_TYPE_ACPI_NVS 4
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#define SMAP_TYPE_ACPI_ERROR 5
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#define SMAP_XATTR_ENABLED 0x00000001
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#define SMAP_XATTR_NON_VOLATILE 0x00000002
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#define SMAP_XATTR_MASK (SMAP_XATTR_ENABLED | SMAP_XATTR_NON_VOLATILE)
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struct bios_smap {
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u_int64_t base;
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u_int64_t length;
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u_int32_t type;
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} __packed;
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/*
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* System Management BIOS
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*/
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#define SMBIOS_START 0xf0000
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#define SMBIOS_STEP 0x10
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#define SMBIOS_OFF 0
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#define SMBIOS_LEN 4
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#define SMBIOS_SIG "_SM_"
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struct smbios_eps {
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uint8_t anchor_string[4]; /* '_SM_' */
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uint8_t checksum;
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uint8_t length;
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uint8_t major_version;
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uint8_t minor_version;
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uint16_t maximum_structure_size;
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uint8_t entry_point_revision;
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uint8_t formatted_area[5];
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uint8_t intermediate_anchor_string[5]; /* '_DMI_' */
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uint8_t intermediate_checksum;
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uint16_t structure_table_length;
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uint32_t structure_table_address;
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uint16_t number_structures;
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uint8_t BCD_revision;
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};
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struct smbios_structure_header {
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uint8_t type;
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uint8_t length;
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uint16_t handle;
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};
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#ifdef _KERNEL
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#define BIOS_PADDRTOVADDR(x) ((x) + KERNBASE)
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#define BIOS_VADDRTOPADDR(x) ((x) - KERNBASE)
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struct bios_oem_signature {
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char * anchor; /* search anchor string in BIOS memory */
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size_t offset; /* offset from anchor (may be negative) */
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size_t totlen; /* total length of BIOS string to copy */
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} __packed;
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struct bios_oem_range {
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u_int from; /* shouldn't be below 0xe0000 */
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u_int to; /* shouldn't be above 0xfffff */
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} __packed;
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struct bios_oem {
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struct bios_oem_range range;
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struct bios_oem_signature signature[];
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} __packed;
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int bios_oem_strings(struct bios_oem *oem, u_char *buffer, size_t maxlen);
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uint32_t bios_sigsearch(uint32_t start, u_char *sig, int siglen, int paralen,
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int sigofs);
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void bios_add_smap_entries(struct bios_smap *smapbase, u_int32_t smapsize,
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vm_paddr_t *physmap, int *physmap_idx);
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#endif
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#endif /* _MACHINE_PC_BIOS_H_ */
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