1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_MPSPEC_H
3#define _ASM_X86_MPSPEC_H
4
5#include <linux/types.h>
6
7#include <asm/mpspec_def.h>
8#include <asm/x86_init.h>
9#include <asm/apicdef.h>
10
11extern int pic_mode;
12
13#ifdef CONFIG_X86_32
14
15/*
16 * Summit or generic (i.e. installer) kernels need lots of bus entries.
17 * Maximum 256 PCI busses, plus 1 ISA bus in each of 4 cabinets.
18 */
19#ifdef CONFIG_BASE_SMALL
20# define MAX_MP_BUSSES 32
21#else
22# define MAX_MP_BUSSES 260
23#endif
24
25#define MAX_IRQ_SOURCES 256
26
27#else /* CONFIG_X86_64: */
28
29#define MAX_MP_BUSSES 256
30/* Each PCI slot may be a combo card with its own bus. 4 IRQ pins per slot. */
31#define MAX_IRQ_SOURCES (MAX_MP_BUSSES * 4)
32
33#endif /* CONFIG_X86_64 */
34
35#ifdef CONFIG_EISA
36extern int mp_bus_id_to_type[MAX_MP_BUSSES];
37#endif
38
39extern DECLARE_BITMAP(mp_bus_not_pci, MAX_MP_BUSSES);
40
41extern u32 boot_cpu_physical_apicid;
42extern u8 boot_cpu_apic_version;
43
44#ifdef CONFIG_X86_LOCAL_APIC
45extern int smp_found_config;
46#else
47# define smp_found_config 0
48#endif
49
50#ifdef CONFIG_X86_MPPARSE
51extern void e820__memblock_alloc_reserved_mpc_new(void);
52extern int enable_update_mptable;
53extern void mpparse_find_mptable(void);
54extern void mpparse_parse_early_smp_config(void);
55extern void mpparse_parse_smp_config(void);
56#else
57static inline void e820__memblock_alloc_reserved_mpc_new(void) { }
58#define enable_update_mptable 0
59#define mpparse_find_mptable x86_init_noop
60#define mpparse_parse_early_smp_config x86_init_noop
61#define mpparse_parse_smp_config x86_init_noop
62#endif
63
64extern DECLARE_BITMAP(phys_cpu_present_map, MAX_LOCAL_APIC);
65
66static inline void reset_phys_cpu_present_map(u32 apicid)
67{
68 bitmap_zero(dst: phys_cpu_present_map, MAX_LOCAL_APIC);
69 set_bit(nr: apicid, addr: phys_cpu_present_map);
70}
71
72static inline void copy_phys_cpu_present_map(unsigned long *dst)
73{
74 bitmap_copy(dst, src: phys_cpu_present_map, MAX_LOCAL_APIC);
75}
76
77#endif /* _ASM_X86_MPSPEC_H */
78