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#include <linux/build_bug.h>
12
13#define PARMAREA		0x10400
14
15#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
16/*
17 * Machine features detected in early.c
18 */
19
20#define MACHINE_FLAG_VM		BIT(0)
21#define MACHINE_FLAG_KVM	BIT(1)
22#define MACHINE_FLAG_LPAR	BIT(2)
23#define MACHINE_FLAG_DIAG9C	BIT(3)
24#define MACHINE_FLAG_ESOP	BIT(4)
25#define MACHINE_FLAG_IDTE	BIT(5)
26#define MACHINE_FLAG_EDAT1	BIT(7)
27#define MACHINE_FLAG_EDAT2	BIT(8)
28#define MACHINE_FLAG_TOPOLOGY	BIT(10)
29#define MACHINE_FLAG_TE		BIT(11)
30#define MACHINE_FLAG_TLB_LC	BIT(12)
31#define MACHINE_FLAG_TLB_GUEST	BIT(14)
32#define MACHINE_FLAG_NX		BIT(15)
33#define MACHINE_FLAG_GS		BIT(16)
34#define MACHINE_FLAG_SCC	BIT(17)
35#define MACHINE_FLAG_PCI_MIO	BIT(18)
36#define MACHINE_FLAG_RDP	BIT(19)
37
38#define LPP_MAGIC		BIT(31)
39#define LPP_PID_MASK		_AC(0xffffffff, UL)
40
41/* Offsets to entry points in kernel/head.S  */
42
43#define STARTUP_NORMAL_OFFSET	0x10000
44#define STARTUP_KDUMP_OFFSET	0x10010
45
46#define LEGACY_COMMAND_LINE_SIZE	896
47
48#ifndef __ASSEMBLY__
49
50#include <asm/lowcore.h>
51#include <asm/types.h>
52
53struct parmarea {
54	unsigned long ipl_device;			/* 0x10400 */
55	unsigned long initrd_start;			/* 0x10408 */
56	unsigned long initrd_size;			/* 0x10410 */
57	unsigned long oldmem_base;			/* 0x10418 */
58	unsigned long oldmem_size;			/* 0x10420 */
59	unsigned long kernel_version;			/* 0x10428 */
60	unsigned long max_command_line_size;		/* 0x10430 */
61	char pad1[0x10480-0x10438];			/* 0x10438 - 0x10480 */
62	char command_line[COMMAND_LINE_SIZE];		/* 0x10480 */
63};
64
65extern struct parmarea parmarea;
66
67extern unsigned int zlib_dfltcc_support;
68#define ZLIB_DFLTCC_DISABLED		0
69#define ZLIB_DFLTCC_FULL		1
70#define ZLIB_DFLTCC_DEFLATE_ONLY	2
71#define ZLIB_DFLTCC_INFLATE_ONLY	3
72#define ZLIB_DFLTCC_FULL_DEBUG		4
73
74extern unsigned long ident_map_size;
75extern unsigned long max_mappable;
76
77/* The Write Back bit position in the physaddr is given by the SLPC PCI */
78extern unsigned long mio_wb_bit_mask;
79
80#define MACHINE_IS_VM		(S390_lowcore.machine_flags & MACHINE_FLAG_VM)
81#define MACHINE_IS_KVM		(S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
82#define MACHINE_IS_LPAR		(S390_lowcore.machine_flags & MACHINE_FLAG_LPAR)
83
84#define MACHINE_HAS_DIAG9C	(S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
85#define MACHINE_HAS_ESOP	(S390_lowcore.machine_flags & MACHINE_FLAG_ESOP)
86#define MACHINE_HAS_IDTE	(S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
87#define MACHINE_HAS_EDAT1	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1)
88#define MACHINE_HAS_EDAT2	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2)
89#define MACHINE_HAS_TOPOLOGY	(S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
90#define MACHINE_HAS_TE		(S390_lowcore.machine_flags & MACHINE_FLAG_TE)
91#define MACHINE_HAS_TLB_LC	(S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
92#define MACHINE_HAS_TLB_GUEST	(S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
93#define MACHINE_HAS_NX		(S390_lowcore.machine_flags & MACHINE_FLAG_NX)
94#define MACHINE_HAS_GS		(S390_lowcore.machine_flags & MACHINE_FLAG_GS)
95#define MACHINE_HAS_SCC		(S390_lowcore.machine_flags & MACHINE_FLAG_SCC)
96#define MACHINE_HAS_PCI_MIO	(S390_lowcore.machine_flags & MACHINE_FLAG_PCI_MIO)
97#define MACHINE_HAS_RDP		(S390_lowcore.machine_flags & MACHINE_FLAG_RDP)
98
99/*
100 * Console mode. Override with conmode=
101 */
102extern unsigned int console_mode;
103extern unsigned int console_devno;
104extern unsigned int console_irq;
105
106#define CONSOLE_IS_UNDEFINED	(console_mode == 0)
107#define CONSOLE_IS_SCLP		(console_mode == 1)
108#define CONSOLE_IS_3215		(console_mode == 2)
109#define CONSOLE_IS_3270		(console_mode == 3)
110#define CONSOLE_IS_VT220	(console_mode == 4)
111#define CONSOLE_IS_HVC		(console_mode == 5)
112#define SET_CONSOLE_SCLP	do { console_mode = 1; } while (0)
113#define SET_CONSOLE_3215	do { console_mode = 2; } while (0)
114#define SET_CONSOLE_3270	do { console_mode = 3; } while (0)
115#define SET_CONSOLE_VT220	do { console_mode = 4; } while (0)
116#define SET_CONSOLE_HVC		do { console_mode = 5; } while (0)
117
118#ifdef CONFIG_VMCP
119void vmcp_cma_reserve(void);
120#else
121static inline void vmcp_cma_reserve(void) { }
122#endif
123
124void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
125
126extern void (*_machine_restart)(char *command);
127extern void (*_machine_halt)(void);
128extern void (*_machine_power_off)(void);
129
130extern unsigned long __kaslr_offset;
131static inline unsigned long kaslr_offset(void)
132{
133	return __kaslr_offset;
134}
135
136extern int __kaslr_enabled;
137static inline int kaslr_enabled(void)
138{
139	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE))
140		return __kaslr_enabled;
141	return 0;
142}
143
144struct oldmem_data {
145	unsigned long start;
146	unsigned long size;
147};
148extern struct oldmem_data oldmem_data;
149
150static __always_inline u32 gen_lpswe(unsigned long addr)
151{
152	BUILD_BUG_ON(addr > 0xfff);
153	return 0xb2b20000 | addr;
154}
155#endif /* __ASSEMBLY__ */
156#endif /* _ASM_S390_SETUP_H */
157