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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#include <linux/build_bug.h>
12
13#define PARMAREA 0x10400
14
15#define COMMAND_LINE_SIZE CONFIG_COMMAND_LINE_SIZE
16
17#define LPP_MAGIC BIT(31)
18#define LPP_PID_MASK _AC(0xffffffff, UL)
19
20/* Offsets to entry points in kernel/head.S */
21
22#define STARTUP_NORMAL_OFFSET 0x10000
23#define STARTUP_KDUMP_OFFSET 0x10010
24
25#define LEGACY_COMMAND_LINE_SIZE 896
26
27#ifndef __ASSEMBLER__
28
29#include <asm/lowcore.h>
30#include <asm/types.h>
31
32struct parmarea {
33 unsigned long ipl_device; /* 0x10400 */
34 unsigned long initrd_start; /* 0x10408 */
35 unsigned long initrd_size; /* 0x10410 */
36 unsigned long oldmem_base; /* 0x10418 */
37 unsigned long oldmem_size; /* 0x10420 */
38 unsigned long kernel_version; /* 0x10428 */
39 unsigned long max_command_line_size; /* 0x10430 */
40 char pad1[0x10480-0x10438]; /* 0x10438 - 0x10480 */
41 char command_line[COMMAND_LINE_SIZE]; /* 0x10480 */
42};
43
44extern char arch_hw_string[128];
45
46extern struct parmarea parmarea;
47
48extern unsigned int zlib_dfltcc_support;
49#define ZLIB_DFLTCC_DISABLED 0
50#define ZLIB_DFLTCC_FULL 1
51#define ZLIB_DFLTCC_DEFLATE_ONLY 2
52#define ZLIB_DFLTCC_INFLATE_ONLY 3
53#define ZLIB_DFLTCC_FULL_DEBUG 4
54
55extern unsigned long max_mappable;
56
57/* The Write Back bit position in the physaddr is given by the SLPC PCI */
58extern unsigned long mio_wb_bit_mask;
59
60/*
61 * Console mode. Override with conmode=
62 */
63extern unsigned int console_mode;
64extern unsigned int console_devno;
65extern unsigned int console_irq;
66
67#define CONSOLE_IS_UNDEFINED (console_mode == 0)
68#define CONSOLE_IS_SCLP (console_mode == 1)
69#define CONSOLE_IS_3215 (console_mode == 2)
70#define CONSOLE_IS_3270 (console_mode == 3)
71#define CONSOLE_IS_VT220 (console_mode == 4)
72#define CONSOLE_IS_HVC (console_mode == 5)
73#define SET_CONSOLE_SCLP do { console_mode = 1; } while (0)
74#define SET_CONSOLE_3215 do { console_mode = 2; } while (0)
75#define SET_CONSOLE_3270 do { console_mode = 3; } while (0)
76#define SET_CONSOLE_VT220 do { console_mode = 4; } while (0)
77#define SET_CONSOLE_HVC do { console_mode = 5; } while (0)
78
79void register_early_console(void);
80
81#ifdef CONFIG_VMCP
82void vmcp_cma_reserve(void);
83#else
84static inline void vmcp_cma_reserve(void) { }
85#endif
86
87void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
88
89extern void (*_machine_restart)(char *command);
90extern void (*_machine_halt)(void);
91extern void (*_machine_power_off)(void);
92
93struct oldmem_data {
94 unsigned long start;
95 unsigned long size;
96};
97extern struct oldmem_data oldmem_data;
98
99static __always_inline u32 gen_lpswe(unsigned long addr)
100{
101 BUILD_BUG_ON(addr > 0xfff);
102 return 0xb2b20000 | addr;
103}
104#endif /* __ASSEMBLER__ */
105#endif /* _ASM_S390_SETUP_H */