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linux/include/asm-s390/lowcore.h
Heiko Carstens 15e9b586e0 [S390] Reset infrastructure for re-IPL. 
In case of re-IPL and diag308 doesn't work we have to reset all devices
manually and wait synchronously that each reset finished.
This patch adds the necessary infrastucture and the first exploiter of it.

Subsystems that need to add a function that needs to be called at re-IPL
may register/unregister this function via

struct reset_call {
	struct reset_call *next;
	void (*fn)(void);
};

void register_reset_call(struct reset_call *reset);
void unregister_reset_call(struct reset_call *reset);

When the registered function get called the context is:

- all cpus beside the current one are stopped
- all machine checks and interrupts are disabled
- prefixing is disabled
- a default machine check handler is available for use

The registered functions may not take any locks are sleep.

For the common I/O layer part of this patch:

Introduce a reset_call css_reset that does the following:
- clear all subchannels
- perform a rchp on all channel paths and wait for the resulting
  machine checks
This replaces the calls to clear_all_subchannels() and
cio_reset_channel_paths() for kexec and ccw reipl. reipl_ccw_dev() now
uses reipl_find_schid() to determine the subchannel id for a given
device id.
Also remove cio_reset_channel_paths() and friends since they are not
needed anymore.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2006-12-04 15:40:26 +01:00

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/*
* include/asm-s390/lowcore.h
*
* S390 version
* Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
* Author(s): Hartmut Penner (hp@de.ibm.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com),
* Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
*/
#ifndef _ASM_S390_LOWCORE_H
#define _ASM_S390_LOWCORE_H
#ifndef __s390x__
#define __LC_EXT_OLD_PSW 0x018
#define __LC_SVC_OLD_PSW 0x020
#define __LC_PGM_OLD_PSW 0x028
#define __LC_MCK_OLD_PSW 0x030
#define __LC_IO_OLD_PSW 0x038
#define __LC_EXT_NEW_PSW 0x058
#define __LC_SVC_NEW_PSW 0x060
#define __LC_PGM_NEW_PSW 0x068
#define __LC_MCK_NEW_PSW 0x070
#define __LC_IO_NEW_PSW 0x078
#else /* !__s390x__ */
#define __LC_EXT_OLD_PSW 0x0130
#define __LC_SVC_OLD_PSW 0x0140
#define __LC_PGM_OLD_PSW 0x0150
#define __LC_MCK_OLD_PSW 0x0160
#define __LC_IO_OLD_PSW 0x0170
#define __LC_EXT_NEW_PSW 0x01b0
#define __LC_SVC_NEW_PSW 0x01c0
#define __LC_PGM_NEW_PSW 0x01d0
#define __LC_MCK_NEW_PSW 0x01e0
#define __LC_IO_NEW_PSW 0x01f0
#endif /* !__s390x__ */
#define __LC_IPL_PARMBLOCK_PTR 0x014
#define __LC_EXT_PARAMS 0x080
#define __LC_CPU_ADDRESS 0x084
#define __LC_EXT_INT_CODE 0x086
#define __LC_SVC_ILC 0x088
#define __LC_SVC_INT_CODE 0x08A
#define __LC_PGM_ILC 0x08C
#define __LC_PGM_INT_CODE 0x08E
#define __LC_PER_ATMID 0x096
#define __LC_PER_ADDRESS 0x098
#define __LC_PER_ACCESS_ID 0x0A1
#define __LC_AR_MODE_ID 0x0A3
#define __LC_SUBCHANNEL_ID 0x0B8
#define __LC_SUBCHANNEL_NR 0x0BA
#define __LC_IO_INT_PARM 0x0BC
#define __LC_IO_INT_WORD 0x0C0
#define __LC_MCCK_CODE 0x0E8
#define __LC_RETURN_PSW 0x200
#define __LC_SAVE_AREA 0xC00
#ifndef __s390x__
#define __LC_IRB 0x208
#define __LC_SYNC_ENTER_TIMER 0x248
#define __LC_ASYNC_ENTER_TIMER 0x250
#define __LC_EXIT_TIMER 0x258
#define __LC_LAST_UPDATE_TIMER 0x260
#define __LC_USER_TIMER 0x268
#define __LC_SYSTEM_TIMER 0x270
#define __LC_LAST_UPDATE_CLOCK 0x278
#define __LC_STEAL_CLOCK 0x280
#define __LC_RETURN_MCCK_PSW 0x288
#define __LC_KERNEL_STACK 0xC40
#define __LC_THREAD_INFO 0xC44
#define __LC_ASYNC_STACK 0xC48
#define __LC_KERNEL_ASCE 0xC4C
#define __LC_USER_ASCE 0xC50
#define __LC_PANIC_STACK 0xC54
#define __LC_CPUID 0xC60
#define __LC_CPUADDR 0xC68
#define __LC_IPLDEV 0xC7C
#define __LC_JIFFY_TIMER 0xC80
#define __LC_CURRENT 0xC90
#define __LC_INT_CLOCK 0xC98
#else /* __s390x__ */
#define __LC_IRB 0x210
#define __LC_SYNC_ENTER_TIMER 0x250
#define __LC_ASYNC_ENTER_TIMER 0x258
#define __LC_EXIT_TIMER 0x260
#define __LC_LAST_UPDATE_TIMER 0x268
#define __LC_USER_TIMER 0x270
#define __LC_SYSTEM_TIMER 0x278
#define __LC_LAST_UPDATE_CLOCK 0x280
#define __LC_STEAL_CLOCK 0x288
#define __LC_RETURN_MCCK_PSW 0x290
#define __LC_KERNEL_STACK 0xD40
#define __LC_THREAD_INFO 0xD48
#define __LC_ASYNC_STACK 0xD50
#define __LC_KERNEL_ASCE 0xD58
#define __LC_USER_ASCE 0xD60
#define __LC_PANIC_STACK 0xD68
#define __LC_CPUID 0xD80
#define __LC_CPUADDR 0xD88
#define __LC_IPLDEV 0xDB8
#define __LC_JIFFY_TIMER 0xDC0
#define __LC_CURRENT 0xDD8
#define __LC_INT_CLOCK 0xDE8
#endif /* __s390x__ */
#define __LC_PANIC_MAGIC 0xE00
#ifndef __s390x__
#define __LC_PFAULT_INTPARM 0x080
#define __LC_CPU_TIMER_SAVE_AREA 0x0D8
#define __LC_CLOCK_COMP_SAVE_AREA 0x0E0
#define __LC_PSW_SAVE_AREA 0x100
#define __LC_PREFIX_SAVE_AREA 0x108
#define __LC_AREGS_SAVE_AREA 0x120
#define __LC_FPREGS_SAVE_AREA 0x160
#define __LC_GPREGS_SAVE_AREA 0x180
#define __LC_CREGS_SAVE_AREA 0x1C0
#else /* __s390x__ */
#define __LC_PFAULT_INTPARM 0x11B8
#define __LC_FPREGS_SAVE_AREA 0x1200
#define __LC_GPREGS_SAVE_AREA 0x1280
#define __LC_PSW_SAVE_AREA 0x1300
#define __LC_PREFIX_SAVE_AREA 0x1318
#define __LC_FP_CREG_SAVE_AREA 0x131C
#define __LC_TODREG_SAVE_AREA 0x1324
#define __LC_CPU_TIMER_SAVE_AREA 0x1328
#define __LC_CLOCK_COMP_SAVE_AREA 0x1331
#define __LC_AREGS_SAVE_AREA 0x1340
#define __LC_CREGS_SAVE_AREA 0x1380
#endif /* __s390x__ */
#ifndef __ASSEMBLY__
#include <asm/processor.h>
#include <linux/types.h>
#include <asm/sigp.h>
void restart_int_handler(void);
void ext_int_handler(void);
void system_call(void);
void pgm_check_handler(void);
void mcck_int_handler(void);
void io_int_handler(void);
struct _lowcore
{
#ifndef __s390x__
/* prefix area: defined by architecture */
psw_t restart_psw; /* 0x000 */
__u32 ccw2[4]; /* 0x008 */
psw_t external_old_psw; /* 0x018 */
psw_t svc_old_psw; /* 0x020 */
psw_t program_old_psw; /* 0x028 */
psw_t mcck_old_psw; /* 0x030 */
psw_t io_old_psw; /* 0x038 */
__u8 pad1[0x58-0x40]; /* 0x040 */
psw_t external_new_psw; /* 0x058 */
psw_t svc_new_psw; /* 0x060 */
psw_t program_new_psw; /* 0x068 */
psw_t mcck_new_psw; /* 0x070 */
psw_t io_new_psw; /* 0x078 */
__u32 ext_params; /* 0x080 */
__u16 cpu_addr; /* 0x084 */
__u16 ext_int_code; /* 0x086 */
__u16 svc_ilc; /* 0x088 */
__u16 svc_code; /* 0x08a */
__u16 pgm_ilc; /* 0x08c */
__u16 pgm_code; /* 0x08e */
__u32 trans_exc_code; /* 0x090 */
__u16 mon_class_num; /* 0x094 */
__u16 per_perc_atmid; /* 0x096 */
__u32 per_address; /* 0x098 */
__u32 monitor_code; /* 0x09c */
__u8 exc_access_id; /* 0x0a0 */
__u8 per_access_id; /* 0x0a1 */
__u8 pad2[0xB8-0xA2]; /* 0x0a2 */
__u16 subchannel_id; /* 0x0b8 */
__u16 subchannel_nr; /* 0x0ba */
__u32 io_int_parm; /* 0x0bc */
__u32 io_int_word; /* 0x0c0 */
__u8 pad3[0xD4-0xC4]; /* 0x0c4 */
__u32 extended_save_area_addr; /* 0x0d4 */
__u32 cpu_timer_save_area[2]; /* 0x0d8 */
__u32 clock_comp_save_area[2]; /* 0x0e0 */
__u32 mcck_interruption_code[2]; /* 0x0e8 */
__u8 pad4[0xf4-0xf0]; /* 0x0f0 */
__u32 external_damage_code; /* 0x0f4 */
__u32 failing_storage_address; /* 0x0f8 */
__u8 pad5[0x100-0xfc]; /* 0x0fc */
__u32 st_status_fixed_logout[4];/* 0x100 */
__u8 pad6[0x120-0x110]; /* 0x110 */
__u32 access_regs_save_area[16];/* 0x120 */
__u32 floating_pt_save_area[8]; /* 0x160 */
__u32 gpregs_save_area[16]; /* 0x180 */
__u32 cregs_save_area[16]; /* 0x1c0 */
psw_t return_psw; /* 0x200 */
__u8 irb[64]; /* 0x208 */
__u64 sync_enter_timer; /* 0x248 */
__u64 async_enter_timer; /* 0x250 */
__u64 exit_timer; /* 0x258 */
__u64 last_update_timer; /* 0x260 */
__u64 user_timer; /* 0x268 */
__u64 system_timer; /* 0x270 */
__u64 last_update_clock; /* 0x278 */
__u64 steal_clock; /* 0x280 */
psw_t return_mcck_psw; /* 0x288 */
__u8 pad8[0xc00-0x290]; /* 0x290 */
/* System info area */
__u32 save_area[16]; /* 0xc00 */
__u32 kernel_stack; /* 0xc40 */
__u32 thread_info; /* 0xc44 */
__u32 async_stack; /* 0xc48 */
__u32 kernel_asce; /* 0xc4c */
__u32 user_asce; /* 0xc50 */
__u32 panic_stack; /* 0xc54 */
__u8 pad10[0xc60-0xc58]; /* 0xc58 */
/* entry.S sensitive area start */
struct cpuinfo_S390 cpu_data; /* 0xc60 */
__u32 ipl_device; /* 0xc7c */
/* entry.S sensitive area end */
/* SMP info area: defined by DJB */
__u64 jiffy_timer; /* 0xc80 */
__u32 ext_call_fast; /* 0xc88 */
__u32 percpu_offset; /* 0xc8c */
__u32 current_task; /* 0xc90 */
__u32 softirq_pending; /* 0xc94 */
__u64 int_clock; /* 0xc98 */
__u8 pad11[0xe00-0xca0]; /* 0xca0 */
/* 0xe00 is used as indicator for dump tools */
/* whether the kernel died with panic() or not */
__u32 panic_magic; /* 0xe00 */
/* Align to the top 1k of prefix area */
__u8 pad12[0x1000-0xe04]; /* 0xe04 */
#else /* !__s390x__ */
/* prefix area: defined by architecture */
__u32 ccw1[2]; /* 0x000 */
__u32 ccw2[4]; /* 0x008 */
__u8 pad1[0x80-0x18]; /* 0x018 */
__u32 ext_params; /* 0x080 */
__u16 cpu_addr; /* 0x084 */
__u16 ext_int_code; /* 0x086 */
__u16 svc_ilc; /* 0x088 */
__u16 svc_code; /* 0x08a */
__u16 pgm_ilc; /* 0x08c */
__u16 pgm_code; /* 0x08e */
__u32 data_exc_code; /* 0x090 */
__u16 mon_class_num; /* 0x094 */
__u16 per_perc_atmid; /* 0x096 */
addr_t per_address; /* 0x098 */
__u8 exc_access_id; /* 0x0a0 */
__u8 per_access_id; /* 0x0a1 */
__u8 op_access_id; /* 0x0a2 */
__u8 ar_access_id; /* 0x0a3 */
__u8 pad2[0xA8-0xA4]; /* 0x0a4 */
addr_t trans_exc_code; /* 0x0A0 */
addr_t monitor_code; /* 0x09c */
__u16 subchannel_id; /* 0x0b8 */
__u16 subchannel_nr; /* 0x0ba */
__u32 io_int_parm; /* 0x0bc */
__u32 io_int_word; /* 0x0c0 */
__u8 pad3[0xc8-0xc4]; /* 0x0c4 */
__u32 stfl_fac_list; /* 0x0c8 */
__u8 pad4[0xe8-0xcc]; /* 0x0cc */
__u32 mcck_interruption_code[2]; /* 0x0e8 */
__u8 pad5[0xf4-0xf0]; /* 0x0f0 */
__u32 external_damage_code; /* 0x0f4 */
addr_t failing_storage_address; /* 0x0f8 */
__u8 pad6[0x120-0x100]; /* 0x100 */
psw_t restart_old_psw; /* 0x120 */
psw_t external_old_psw; /* 0x130 */
psw_t svc_old_psw; /* 0x140 */
psw_t program_old_psw; /* 0x150 */
psw_t mcck_old_psw; /* 0x160 */
psw_t io_old_psw; /* 0x170 */
__u8 pad7[0x1a0-0x180]; /* 0x180 */
psw_t restart_psw; /* 0x1a0 */
psw_t external_new_psw; /* 0x1b0 */
psw_t svc_new_psw; /* 0x1c0 */
psw_t program_new_psw; /* 0x1d0 */
psw_t mcck_new_psw; /* 0x1e0 */
psw_t io_new_psw; /* 0x1f0 */
psw_t return_psw; /* 0x200 */
__u8 irb[64]; /* 0x210 */
__u64 sync_enter_timer; /* 0x250 */
__u64 async_enter_timer; /* 0x258 */
__u64 exit_timer; /* 0x260 */
__u64 last_update_timer; /* 0x268 */
__u64 user_timer; /* 0x270 */
__u64 system_timer; /* 0x278 */
__u64 last_update_clock; /* 0x280 */
__u64 steal_clock; /* 0x288 */
psw_t return_mcck_psw; /* 0x290 */
__u8 pad8[0xc00-0x2a0]; /* 0x2a0 */
/* System info area */
__u64 save_area[16]; /* 0xc00 */
__u8 pad9[0xd40-0xc80]; /* 0xc80 */
__u64 kernel_stack; /* 0xd40 */
__u64 thread_info; /* 0xd48 */
__u64 async_stack; /* 0xd50 */
__u64 kernel_asce; /* 0xd58 */
__u64 user_asce; /* 0xd60 */
__u64 panic_stack; /* 0xd68 */
__u8 pad10[0xd80-0xd70]; /* 0xd70 */
/* entry.S sensitive area start */
struct cpuinfo_S390 cpu_data; /* 0xd80 */
__u32 ipl_device; /* 0xdb8 */
__u32 pad11; /* 0xdbc */
/* entry.S sensitive area end */
/* SMP info area: defined by DJB */
__u64 jiffy_timer; /* 0xdc0 */
__u64 ext_call_fast; /* 0xdc8 */
__u64 percpu_offset; /* 0xdd0 */
__u64 current_task; /* 0xdd8 */
__u64 softirq_pending; /* 0xde0 */
__u64 int_clock; /* 0xde8 */
__u8 pad12[0xe00-0xdf0]; /* 0xdf0 */
/* 0xe00 is used as indicator for dump tools */
/* whether the kernel died with panic() or not */
__u32 panic_magic; /* 0xe00 */
__u8 pad13[0x1200-0xe04]; /* 0xe04 */
/* System info area */
__u64 floating_pt_save_area[16]; /* 0x1200 */
__u64 gpregs_save_area[16]; /* 0x1280 */
__u32 st_status_fixed_logout[4]; /* 0x1300 */
__u8 pad14[0x1318-0x1310]; /* 0x1310 */
__u32 prefixreg_save_area; /* 0x1318 */
__u32 fpt_creg_save_area; /* 0x131c */
__u8 pad15[0x1324-0x1320]; /* 0x1320 */
__u32 tod_progreg_save_area; /* 0x1324 */
__u32 cpu_timer_save_area[2]; /* 0x1328 */
__u32 clock_comp_save_area[2]; /* 0x1330 */
__u8 pad16[0x1340-0x1338]; /* 0x1338 */
__u32 access_regs_save_area[16]; /* 0x1340 */
__u64 cregs_save_area[16]; /* 0x1380 */
/* align to the top of the prefix area */
__u8 pad17[0x2000-0x1400]; /* 0x1400 */
#endif /* !__s390x__ */
} __attribute__((packed)); /* End structure*/
#define S390_lowcore (*((struct _lowcore *) 0))
extern struct _lowcore *lowcore_ptr[];
static inline void set_prefix(__u32 address)
{
asm volatile("spx %0" : : "m" (address) : "memory");
}
static inline __u32 store_prefix(void)
{
__u32 address;
asm volatile("stpx %0" : "=m" (address));
return address;
}
#define __PANIC_MAGIC 0xDEADC0DE
#endif
#endif
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