setup.h

  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 ident_map_size;
 56extern unsigned long max_mappable;
 57
 58/* The Write Back bit position in the physaddr is given by the SLPC PCI */
 59extern unsigned long mio_wb_bit_mask;
 60
 61/*
 62 * Console mode. Override with conmode=
 63 */
 64extern unsigned int console_mode;
 65extern unsigned int console_devno;
 66extern unsigned int console_irq;
 67
 68#define CONSOLE_IS_UNDEFINED	(console_mode == 0)
 69#define CONSOLE_IS_SCLP		(console_mode == 1)
 70#define CONSOLE_IS_3215		(console_mode == 2)
 71#define CONSOLE_IS_3270		(console_mode == 3)
 72#define CONSOLE_IS_VT220	(console_mode == 4)
 73#define CONSOLE_IS_HVC		(console_mode == 5)
 74#define SET_CONSOLE_SCLP	do { console_mode = 1; } while (0)
 75#define SET_CONSOLE_3215	do { console_mode = 2; } while (0)
 76#define SET_CONSOLE_3270	do { console_mode = 3; } while (0)
 77#define SET_CONSOLE_VT220	do { console_mode = 4; } while (0)
 78#define SET_CONSOLE_HVC		do { console_mode = 5; } while (0)
 79
 80void register_early_console(void);
 81
 82#ifdef CONFIG_VMCP
 83void vmcp_cma_reserve(void);
 84#else
 85static inline void vmcp_cma_reserve(void) { }
 86#endif
 87
 88void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
 89
 90extern void (*_machine_restart)(char *command);
 91extern void (*_machine_halt)(void);
 92extern void (*_machine_power_off)(void);
 93
 94struct oldmem_data {
 95	unsigned long start;
 96	unsigned long size;
 97};
 98extern struct oldmem_data oldmem_data;
 99
100static __always_inline u32 gen_lpswe(unsigned long addr)
101{
102	BUILD_BUG_ON(addr > 0xfff);
103	return 0xb2b20000 | addr;
104}
105#endif /* __ASSEMBLER__ */
106#endif /* _ASM_S390_SETUP_H */