1/*
2 *    Copyright IBM Corp. 1999, 2012
3 *    Author(s): Hartmut Penner <hp@de.ibm.com>,
4 *		 Martin Schwidefsky <schwidefsky@de.ibm.com>,
5 *		 Denis Joseph Barrow,
6 */
7
8#ifndef _ASM_S390_LOWCORE_H
9#define _ASM_S390_LOWCORE_H
10
11#include <linux/types.h>
12#include <asm/ptrace.h>
13#include <asm/cpu.h>
14#include <asm/types.h>
15
16#define LC_ORDER 1
17#define LC_PAGES 2
18
19struct save_area {
20	u64	fp_regs[16];
21	u64	gp_regs[16];
22	u8	psw[16];
23	u8	pad1[8];
24	u32	pref_reg;
25	u32	fp_ctrl_reg;
26	u8	pad2[4];
27	u32	tod_reg;
28	u64	timer;
29	u64	clk_cmp;
30	u8	pad3[8];
31	u32	acc_regs[16];
32	u64	ctrl_regs[16];
33} __packed;
34
35struct save_area_ext {
36	struct save_area	sa;
37	__vector128		vx_regs[32];
38};
39
40struct _lowcore {
41	__u8	pad_0x0000[0x0014-0x0000];	/* 0x0000 */
42	__u32	ipl_parmblock_ptr;		/* 0x0014 */
43	__u8	pad_0x0018[0x0080-0x0018];	/* 0x0018 */
44	__u32	ext_params;			/* 0x0080 */
45	__u16	ext_cpu_addr;			/* 0x0084 */
46	__u16	ext_int_code;			/* 0x0086 */
47	__u16	svc_ilc;			/* 0x0088 */
48	__u16	svc_code;			/* 0x008a */
49	__u16	pgm_ilc;			/* 0x008c */
50	__u16	pgm_code;			/* 0x008e */
51	__u32	data_exc_code;			/* 0x0090 */
52	__u16	mon_class_num;			/* 0x0094 */
53	__u8	per_code;			/* 0x0096 */
54	__u8	per_atmid;			/* 0x0097 */
55	__u64	per_address;			/* 0x0098 */
56	__u8	exc_access_id;			/* 0x00a0 */
57	__u8	per_access_id;			/* 0x00a1 */
58	__u8	op_access_id;			/* 0x00a2 */
59	__u8	ar_mode_id;			/* 0x00a3 */
60	__u8	pad_0x00a4[0x00a8-0x00a4];	/* 0x00a4 */
61	__u64	trans_exc_code;			/* 0x00a8 */
62	__u64	monitor_code;			/* 0x00b0 */
63	__u16	subchannel_id;			/* 0x00b8 */
64	__u16	subchannel_nr;			/* 0x00ba */
65	__u32	io_int_parm;			/* 0x00bc */
66	__u32	io_int_word;			/* 0x00c0 */
67	__u8	pad_0x00c4[0x00c8-0x00c4];	/* 0x00c4 */
68	__u32	stfl_fac_list;			/* 0x00c8 */
69	__u8	pad_0x00cc[0x00e8-0x00cc];	/* 0x00cc */
70	__u32	mcck_interruption_code[2];	/* 0x00e8 */
71	__u8	pad_0x00f0[0x00f4-0x00f0];	/* 0x00f0 */
72	__u32	external_damage_code;		/* 0x00f4 */
73	__u64	failing_storage_address;	/* 0x00f8 */
74	__u8	pad_0x0100[0x0110-0x0100];	/* 0x0100 */
75	__u64	breaking_event_addr;		/* 0x0110 */
76	__u8	pad_0x0118[0x0120-0x0118];	/* 0x0118 */
77	psw_t	restart_old_psw;		/* 0x0120 */
78	psw_t	external_old_psw;		/* 0x0130 */
79	psw_t	svc_old_psw;			/* 0x0140 */
80	psw_t	program_old_psw;		/* 0x0150 */
81	psw_t	mcck_old_psw;			/* 0x0160 */
82	psw_t	io_old_psw;			/* 0x0170 */
83	__u8	pad_0x0180[0x01a0-0x0180];	/* 0x0180 */
84	psw_t	restart_psw;			/* 0x01a0 */
85	psw_t	external_new_psw;		/* 0x01b0 */
86	psw_t	svc_new_psw;			/* 0x01c0 */
87	psw_t	program_new_psw;		/* 0x01d0 */
88	psw_t	mcck_new_psw;			/* 0x01e0 */
89	psw_t	io_new_psw;			/* 0x01f0 */
90
91	/* Save areas. */
92	__u64	save_area_sync[8];		/* 0x0200 */
93	__u64	save_area_async[8];		/* 0x0240 */
94	__u64	save_area_restart[1];		/* 0x0280 */
95
96	/* CPU flags. */
97	__u64	cpu_flags;			/* 0x0288 */
98
99	/* Return psws. */
100	psw_t	return_psw;			/* 0x0290 */
101	psw_t	return_mcck_psw;		/* 0x02a0 */
102
103	/* CPU accounting and timing values. */
104	__u64	sync_enter_timer;		/* 0x02b0 */
105	__u64	async_enter_timer;		/* 0x02b8 */
106	__u64	mcck_enter_timer;		/* 0x02c0 */
107	__u64	exit_timer;			/* 0x02c8 */
108	__u64	user_timer;			/* 0x02d0 */
109	__u64	system_timer;			/* 0x02d8 */
110	__u64	steal_timer;			/* 0x02e0 */
111	__u64	last_update_timer;		/* 0x02e8 */
112	__u64	last_update_clock;		/* 0x02f0 */
113	__u64	int_clock;			/* 0x02f8 */
114	__u64	mcck_clock;			/* 0x0300 */
115	__u64	clock_comparator;		/* 0x0308 */
116
117	/* Current process. */
118	__u64	current_task;			/* 0x0310 */
119	__u64	thread_info;			/* 0x0318 */
120	__u64	kernel_stack;			/* 0x0320 */
121
122	/* Interrupt, panic and restart stack. */
123	__u64	async_stack;			/* 0x0328 */
124	__u64	panic_stack;			/* 0x0330 */
125	__u64	restart_stack;			/* 0x0338 */
126
127	/* Restart function and parameter. */
128	__u64	restart_fn;			/* 0x0340 */
129	__u64	restart_data;			/* 0x0348 */
130	__u64	restart_source;			/* 0x0350 */
131
132	/* Address space pointer. */
133	__u64	kernel_asce;			/* 0x0358 */
134	__u64	user_asce;			/* 0x0360 */
135	__u64	current_pid;			/* 0x0368 */
136
137	/* SMP info area */
138	__u32	cpu_nr;				/* 0x0370 */
139	__u32	softirq_pending;		/* 0x0374 */
140	__u64	percpu_offset;			/* 0x0378 */
141	__u64	vdso_per_cpu_data;		/* 0x0380 */
142	__u64	machine_flags;			/* 0x0388 */
143	__u8	pad_0x0390[0x0398-0x0390];	/* 0x0390 */
144	__u64	gmap;				/* 0x0398 */
145	__u32	spinlock_lockval;		/* 0x03a0 */
146	__u8	pad_0x03a0[0x0400-0x03a4];	/* 0x03a4 */
147
148	/* Per cpu primary space access list */
149	__u32	paste[16];			/* 0x0400 */
150
151	__u8	pad_0x04c0[0x0e00-0x0440];	/* 0x0440 */
152
153	/*
154	 * 0xe00 contains the address of the IPL Parameter Information
155	 * block. Dump tools need IPIB for IPL after dump.
156	 * Note: do not change the position of any fields in 0x0e00-0x0f00
157	 */
158	__u64	ipib;				/* 0x0e00 */
159	__u32	ipib_checksum;			/* 0x0e08 */
160	__u64	vmcore_info;			/* 0x0e0c */
161	__u8	pad_0x0e14[0x0e18-0x0e14];	/* 0x0e14 */
162	__u64	os_info;			/* 0x0e18 */
163	__u8	pad_0x0e20[0x0f00-0x0e20];	/* 0x0e20 */
164
165	/* Extended facility list */
166	__u64	stfle_fac_list[32];		/* 0x0f00 */
167	__u8	pad_0x1000[0x11b0-0x1000];	/* 0x1000 */
168
169	/* Pointer to vector register save area */
170	__u64	vector_save_area_addr;		/* 0x11b0 */
171
172	/* 64 bit extparam used for pfault/diag 250: defined by architecture */
173	__u64	ext_params2;			/* 0x11B8 */
174	__u8	pad_0x11c0[0x1200-0x11C0];	/* 0x11C0 */
175
176	/* CPU register save area: defined by architecture */
177	__u64	floating_pt_save_area[16];	/* 0x1200 */
178	__u64	gpregs_save_area[16];		/* 0x1280 */
179	psw_t	psw_save_area;			/* 0x1300 */
180	__u8	pad_0x1310[0x1318-0x1310];	/* 0x1310 */
181	__u32	prefixreg_save_area;		/* 0x1318 */
182	__u32	fpt_creg_save_area;		/* 0x131c */
183	__u8	pad_0x1320[0x1324-0x1320];	/* 0x1320 */
184	__u32	tod_progreg_save_area;		/* 0x1324 */
185	__u32	cpu_timer_save_area[2];		/* 0x1328 */
186	__u32	clock_comp_save_area[2];	/* 0x1330 */
187	__u8	pad_0x1338[0x1340-0x1338];	/* 0x1338 */
188	__u32	access_regs_save_area[16];	/* 0x1340 */
189	__u64	cregs_save_area[16];		/* 0x1380 */
190	__u8	pad_0x1400[0x1800-0x1400];	/* 0x1400 */
191
192	/* Transaction abort diagnostic block */
193	__u8	pgm_tdb[256];			/* 0x1800 */
194	__u8	pad_0x1900[0x1c00-0x1900];	/* 0x1900 */
195
196	/* Software defined save area for vector registers */
197	__u8	vector_save_area[1024];		/* 0x1c00 */
198} __packed;
199
200#define S390_lowcore (*((struct _lowcore *) 0))
201
202extern struct _lowcore *lowcore_ptr[];
203
204static inline void set_prefix(__u32 address)
205{
206	asm volatile("spx %0" : : "m" (address) : "memory");
207}
208
209static inline __u32 store_prefix(void)
210{
211	__u32 address;
212
213	asm volatile("stpx %0" : "=m" (address));
214	return address;
215}
216
217#endif /* _ASM_S390_LOWCORE_H */
218