Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * S390 version
4 * Copyright IBM Corp. 1999, 2017
5 */
6#ifndef _ASM_S390_SETUP_H
7#define _ASM_S390_SETUP_H
8
9#include <linux/bits.h>
10#include <uapi/asm/setup.h>
11
12#define EP_OFFSET 0x10008
13#define EP_STRING "S390EP"
14#define PARMAREA 0x10400
15#define EARLY_SCCB_OFFSET 0x11000
16#define HEAD_END 0x12000
17
18#define EARLY_SCCB_SIZE PAGE_SIZE
19
20/*
21 * Machine features detected in early.c
22 */
23
24#define MACHINE_FLAG_VM BIT(0)
25#define MACHINE_FLAG_KVM BIT(1)
26#define MACHINE_FLAG_LPAR BIT(2)
27#define MACHINE_FLAG_DIAG9C BIT(3)
28#define MACHINE_FLAG_ESOP BIT(4)
29#define MACHINE_FLAG_IDTE BIT(5)
30#define MACHINE_FLAG_DIAG44 BIT(6)
31#define MACHINE_FLAG_EDAT1 BIT(7)
32#define MACHINE_FLAG_EDAT2 BIT(8)
33#define MACHINE_FLAG_TOPOLOGY BIT(10)
34#define MACHINE_FLAG_TE BIT(11)
35#define MACHINE_FLAG_TLB_LC BIT(12)
36#define MACHINE_FLAG_VX BIT(13)
37#define MACHINE_FLAG_TLB_GUEST BIT(14)
38#define MACHINE_FLAG_NX BIT(15)
39#define MACHINE_FLAG_GS BIT(16)
40#define MACHINE_FLAG_SCC BIT(17)
41
42#define LPP_MAGIC BIT(31)
43#define LPP_PID_MASK _AC(0xffffffff, UL)
44
45/* Offsets to entry points in kernel/head.S */
46
47#define STARTUP_NORMAL_OFFSET 0x10000
48#define STARTUP_KDUMP_OFFSET 0x10010
49
50/* Offsets to parameters in kernel/head.S */
51
52#define IPL_DEVICE_OFFSET 0x10400
53#define INITRD_START_OFFSET 0x10408
54#define INITRD_SIZE_OFFSET 0x10410
55#define OLDMEM_BASE_OFFSET 0x10418
56#define OLDMEM_SIZE_OFFSET 0x10420
57#define KERNEL_VERSION_OFFSET 0x10428
58#define COMMAND_LINE_OFFSET 0x10480
59
60#ifndef __ASSEMBLY__
61
62#include <asm/lowcore.h>
63#include <asm/types.h>
64
65#define IPL_DEVICE (*(unsigned long *) (IPL_DEVICE_OFFSET))
66#define INITRD_START (*(unsigned long *) (INITRD_START_OFFSET))
67#define INITRD_SIZE (*(unsigned long *) (INITRD_SIZE_OFFSET))
68#define OLDMEM_BASE (*(unsigned long *) (OLDMEM_BASE_OFFSET))
69#define OLDMEM_SIZE (*(unsigned long *) (OLDMEM_SIZE_OFFSET))
70#define COMMAND_LINE ((char *) (COMMAND_LINE_OFFSET))
71
72struct parmarea {
73 unsigned long ipl_device; /* 0x10400 */
74 unsigned long initrd_start; /* 0x10408 */
75 unsigned long initrd_size; /* 0x10410 */
76 unsigned long oldmem_base; /* 0x10418 */
77 unsigned long oldmem_size; /* 0x10420 */
78 unsigned long kernel_version; /* 0x10428 */
79 char pad1[0x10480 - 0x10430]; /* 0x10430 - 0x10480 */
80 char command_line[ARCH_COMMAND_LINE_SIZE]; /* 0x10480 */
81};
82
83extern int noexec_disabled;
84extern int memory_end_set;
85extern unsigned long memory_end;
86extern unsigned long max_physmem_end;
87extern unsigned long __swsusp_reset_dma;
88
89#define MACHINE_IS_VM (S390_lowcore.machine_flags & MACHINE_FLAG_VM)
90#define MACHINE_IS_KVM (S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
91#define MACHINE_IS_LPAR (S390_lowcore.machine_flags & MACHINE_FLAG_LPAR)
92
93#define MACHINE_HAS_DIAG9C (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
94#define MACHINE_HAS_ESOP (S390_lowcore.machine_flags & MACHINE_FLAG_ESOP)
95#define MACHINE_HAS_IDTE (S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
96#define MACHINE_HAS_DIAG44 (S390_lowcore.machine_flags & MACHINE_FLAG_DIAG44)
97#define MACHINE_HAS_EDAT1 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1)
98#define MACHINE_HAS_EDAT2 (S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2)
99#define MACHINE_HAS_TOPOLOGY (S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
100#define MACHINE_HAS_TE (S390_lowcore.machine_flags & MACHINE_FLAG_TE)
101#define MACHINE_HAS_TLB_LC (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
102#define MACHINE_HAS_VX (S390_lowcore.machine_flags & MACHINE_FLAG_VX)
103#define MACHINE_HAS_TLB_GUEST (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
104#define MACHINE_HAS_NX (S390_lowcore.machine_flags & MACHINE_FLAG_NX)
105#define MACHINE_HAS_GS (S390_lowcore.machine_flags & MACHINE_FLAG_GS)
106#define MACHINE_HAS_SCC (S390_lowcore.machine_flags & MACHINE_FLAG_SCC)
107
108/*
109 * Console mode. Override with conmode=
110 */
111extern unsigned int console_mode;
112extern unsigned int console_devno;
113extern unsigned int console_irq;
114
115extern char vmhalt_cmd[];
116extern char vmpoff_cmd[];
117
118#define CONSOLE_IS_UNDEFINED (console_mode == 0)
119#define CONSOLE_IS_SCLP (console_mode == 1)
120#define CONSOLE_IS_3215 (console_mode == 2)
121#define CONSOLE_IS_3270 (console_mode == 3)
122#define CONSOLE_IS_VT220 (console_mode == 4)
123#define CONSOLE_IS_HVC (console_mode == 5)
124#define SET_CONSOLE_SCLP do { console_mode = 1; } while (0)
125#define SET_CONSOLE_3215 do { console_mode = 2; } while (0)
126#define SET_CONSOLE_3270 do { console_mode = 3; } while (0)
127#define SET_CONSOLE_VT220 do { console_mode = 4; } while (0)
128#define SET_CONSOLE_HVC do { console_mode = 5; } while (0)
129
130#ifdef CONFIG_PFAULT
131extern int pfault_init(void);
132extern void pfault_fini(void);
133#else /* CONFIG_PFAULT */
134#define pfault_init() ({-1;})
135#define pfault_fini() do { } while (0)
136#endif /* CONFIG_PFAULT */
137
138#ifdef CONFIG_VMCP
139void vmcp_cma_reserve(void);
140#else
141static inline void vmcp_cma_reserve(void) { }
142#endif
143
144void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
145
146void cmma_init(void);
147void cmma_init_nodat(void);
148
149extern void (*_machine_restart)(char *command);
150extern void (*_machine_halt)(void);
151extern void (*_machine_power_off)(void);
152
153extern unsigned long __kaslr_offset;
154static inline unsigned long kaslr_offset(void)
155{
156 return __kaslr_offset;
157}
158
159#else /* __ASSEMBLY__ */
160
161#define IPL_DEVICE (IPL_DEVICE_OFFSET)
162#define INITRD_START (INITRD_START_OFFSET)
163#define INITRD_SIZE (INITRD_SIZE_OFFSET)
164#define OLDMEM_BASE (OLDMEM_BASE_OFFSET)
165#define OLDMEM_SIZE (OLDMEM_SIZE_OFFSET)
166#define COMMAND_LINE (COMMAND_LINE_OFFSET)
167
168#endif /* __ASSEMBLY__ */
169#endif /* _ASM_S390_SETUP_H */