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_VX		BIT(13)
32 #define MACHINE_FLAG_TLB_GUEST	BIT(14)
33 #define MACHINE_FLAG_NX		BIT(15)
34 #define MACHINE_FLAG_GS		BIT(16)
35 #define MACHINE_FLAG_SCC	BIT(17)
36 #define MACHINE_FLAG_PCI_MIO	BIT(18)
37 #define MACHINE_FLAG_RDP	BIT(19)
38 
39 #define LPP_MAGIC		BIT(31)
40 #define LPP_PID_MASK		_AC(0xffffffff, UL)
41 
42 /* Offsets to entry points in kernel/head.S  */
43 
44 #define STARTUP_NORMAL_OFFSET	0x10000
45 #define STARTUP_KDUMP_OFFSET	0x10010
46 
47 #define LEGACY_COMMAND_LINE_SIZE	896
48 
49 #ifndef __ASSEMBLY__
50 
51 #include <asm/lowcore.h>
52 #include <asm/types.h>
53 
54 struct parmarea {
55 	unsigned long ipl_device;			/* 0x10400 */
56 	unsigned long initrd_start;			/* 0x10408 */
57 	unsigned long initrd_size;			/* 0x10410 */
58 	unsigned long oldmem_base;			/* 0x10418 */
59 	unsigned long oldmem_size;			/* 0x10420 */
60 	unsigned long kernel_version;			/* 0x10428 */
61 	unsigned long max_command_line_size;		/* 0x10430 */
62 	char pad1[0x10480-0x10438];			/* 0x10438 - 0x10480 */
63 	char command_line[COMMAND_LINE_SIZE];		/* 0x10480 */
64 };
65 
66 extern struct parmarea parmarea;
67 
68 extern unsigned int zlib_dfltcc_support;
69 #define ZLIB_DFLTCC_DISABLED		0
70 #define ZLIB_DFLTCC_FULL		1
71 #define ZLIB_DFLTCC_DEFLATE_ONLY	2
72 #define ZLIB_DFLTCC_INFLATE_ONLY	3
73 #define ZLIB_DFLTCC_FULL_DEBUG		4
74 
75 extern unsigned long ident_map_size;
76 extern unsigned long max_mappable;
77 
78 /* The Write Back bit position in the physaddr is given by the SLPC PCI */
79 extern unsigned long mio_wb_bit_mask;
80 
81 #define MACHINE_IS_VM		(S390_lowcore.machine_flags & MACHINE_FLAG_VM)
82 #define MACHINE_IS_KVM		(S390_lowcore.machine_flags & MACHINE_FLAG_KVM)
83 #define MACHINE_IS_LPAR		(S390_lowcore.machine_flags & MACHINE_FLAG_LPAR)
84 
85 #define MACHINE_HAS_DIAG9C	(S390_lowcore.machine_flags & MACHINE_FLAG_DIAG9C)
86 #define MACHINE_HAS_ESOP	(S390_lowcore.machine_flags & MACHINE_FLAG_ESOP)
87 #define MACHINE_HAS_IDTE	(S390_lowcore.machine_flags & MACHINE_FLAG_IDTE)
88 #define MACHINE_HAS_EDAT1	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT1)
89 #define MACHINE_HAS_EDAT2	(S390_lowcore.machine_flags & MACHINE_FLAG_EDAT2)
90 #define MACHINE_HAS_TOPOLOGY	(S390_lowcore.machine_flags & MACHINE_FLAG_TOPOLOGY)
91 #define MACHINE_HAS_TE		(S390_lowcore.machine_flags & MACHINE_FLAG_TE)
92 #define MACHINE_HAS_TLB_LC	(S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
93 #define MACHINE_HAS_VX		(S390_lowcore.machine_flags & MACHINE_FLAG_VX)
94 #define MACHINE_HAS_TLB_GUEST	(S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
95 #define MACHINE_HAS_NX		(S390_lowcore.machine_flags & MACHINE_FLAG_NX)
96 #define MACHINE_HAS_GS		(S390_lowcore.machine_flags & MACHINE_FLAG_GS)
97 #define MACHINE_HAS_SCC		(S390_lowcore.machine_flags & MACHINE_FLAG_SCC)
98 #define MACHINE_HAS_PCI_MIO	(S390_lowcore.machine_flags & MACHINE_FLAG_PCI_MIO)
99 #define MACHINE_HAS_RDP		(S390_lowcore.machine_flags & MACHINE_FLAG_RDP)
100 
101 /*
102  * Console mode. Override with conmode=
103  */
104 extern unsigned int console_mode;
105 extern unsigned int console_devno;
106 extern unsigned int console_irq;
107 
108 #define CONSOLE_IS_UNDEFINED	(console_mode == 0)
109 #define CONSOLE_IS_SCLP		(console_mode == 1)
110 #define CONSOLE_IS_3215		(console_mode == 2)
111 #define CONSOLE_IS_3270		(console_mode == 3)
112 #define CONSOLE_IS_VT220	(console_mode == 4)
113 #define CONSOLE_IS_HVC		(console_mode == 5)
114 #define SET_CONSOLE_SCLP	do { console_mode = 1; } while (0)
115 #define SET_CONSOLE_3215	do { console_mode = 2; } while (0)
116 #define SET_CONSOLE_3270	do { console_mode = 3; } while (0)
117 #define SET_CONSOLE_VT220	do { console_mode = 4; } while (0)
118 #define SET_CONSOLE_HVC		do { console_mode = 5; } while (0)
119 
120 #ifdef CONFIG_VMCP
121 void vmcp_cma_reserve(void);
122 #else
vmcp_cma_reserve(void)123 static inline void vmcp_cma_reserve(void) { }
124 #endif
125 
126 void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
127 
128 void cmma_init(void);
129 void cmma_init_nodat(void);
130 
131 extern void (*_machine_restart)(char *command);
132 extern void (*_machine_halt)(void);
133 extern void (*_machine_power_off)(void);
134 
135 extern unsigned long __kaslr_offset;
kaslr_offset(void)136 static inline unsigned long kaslr_offset(void)
137 {
138 	return __kaslr_offset;
139 }
140 
141 extern int __kaslr_enabled;
kaslr_enabled(void)142 static inline int kaslr_enabled(void)
143 {
144 	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE))
145 		return __kaslr_enabled;
146 	return 0;
147 }
148 
149 struct oldmem_data {
150 	unsigned long start;
151 	unsigned long size;
152 };
153 extern struct oldmem_data oldmem_data;
154 
gen_lpswe(unsigned long addr)155 static __always_inline u32 gen_lpswe(unsigned long addr)
156 {
157 	BUILD_BUG_ON(addr > 0xfff);
158 	return 0xb2b20000 | addr;
159 }
160 #endif /* __ASSEMBLY__ */
161 #endif /* _ASM_S390_SETUP_H */
162