1 /*
2 * include/asm-s390/lowcore.h
3 *
4 * S390 version
5 * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 * Author(s): Hartmut Penner (hp@de.ibm.com),
7 * Martin Schwidefsky (schwidefsky@de.ibm.com),
8 * Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
9 */
10
11 #ifndef _ASM_S390_LOWCORE_H
12 #define _ASM_S390_LOWCORE_H
13
14 #define __LC_EXT_OLD_PSW 0x018
15 #define __LC_SVC_OLD_PSW 0x020
16 #define __LC_PGM_OLD_PSW 0x028
17 #define __LC_MCK_OLD_PSW 0x030
18 #define __LC_IO_OLD_PSW 0x038
19 #define __LC_EXT_NEW_PSW 0x058
20 #define __LC_SVC_NEW_PSW 0x060
21 #define __LC_PGM_NEW_PSW 0x068
22 #define __LC_MCK_NEW_PSW 0x070
23 #define __LC_IO_NEW_PSW 0x078
24 #define __LC_EXT_PARAMS 0x080
25 #define __LC_CPU_ADDRESS 0x084
26 #define __LC_EXT_INT_CODE 0x086
27 #define __LC_SVC_INT_CODE 0x08B
28 #define __LC_PGM_ILC 0x08C
29 #define __LC_PGM_INT_CODE 0x08E
30 #define __LC_TRANS_EXC_ADDR 0x090
31 #define __LC_SUBCHANNEL_ID 0x0B8
32 #define __LC_SUBCHANNEL_NR 0x0BA
33 #define __LC_IO_INT_PARM 0x0BC
34 #define __LC_MCCK_CODE 0x0E8
35 #define __LC_AREGS_SAVE_AREA 0x200
36 #define __LC_CREGS_SAVE_AREA 0x240
37 #define __LC_RETURN_PSW 0x280
38
39 #define __LC_SYNC_IO_WORD 0x400
40
41 #define __LC_SAVE_AREA 0xC00
42 #define __LC_KERNEL_STACK 0xC40
43 #define __LC_KERNEL_LEVEL 0xC44
44 #define __LC_IRQ_STAT 0xC48
45 #define __LC_CPUID 0xC60
46 #define __LC_CPUADDR 0xC68
47 #define __LC_IPLDEV 0xC7C
48
49
50 /* interrupt handler start with all io, external and mcck interrupt disabled */
51
52 #define _RESTART_PSW_MASK 0x00080000
53 #define _EXT_PSW_MASK 0x04080000
54 #define _PGM_PSW_MASK 0x04080000
55 #define _SVC_PSW_MASK 0x04080000
56 #define _MCCK_PSW_MASK 0x040A0000
57 #define _IO_PSW_MASK 0x04080000
58 #define _USER_PSW_MASK 0x070DC000/* DAT, IO, EXT, Home-space */
59 #define _WAIT_PSW_MASK 0x070E0000/* DAT, IO, EXT, Wait, Home-space */
60 #define _DW_PSW_MASK 0x000A0000/* disabled wait PSW mask */
61
62 #define _PRIMARY_MASK 0x0000 /* MASK for SACF */
63 #define _SECONDARY_MASK 0x0100 /* MASK for SACF */
64 #define _ACCESS_MASK 0x0200 /* MASK for SACF */
65 #define _HOME_MASK 0x0300 /* MASK for SACF */
66
67 #define _PSW_PRIM_SPACE_MODE 0x00000000
68 #define _PSW_SEC_SPACE_MODE 0x00008000
69 #define _PSW_ACC_REG_MODE 0x00004000
70 #define _PSW_HOME_SPACE_MODE 0x0000C000
71
72 #define _PSW_WAIT_MASK_BIT 0x00020000 /* Wait bit */
73 #define _PSW_IO_MASK_BIT 0x02000000 /* IO bit */
74 #define _PSW_IO_WAIT 0x02020000 /* IO & Wait bit */
75
76 /* we run in 31 Bit mode */
77 #define _ADDR_31 0x80000000
78
79 #ifndef __ASSEMBLY__
80
81 #include <linux/config.h>
82 #include <asm/processor.h>
83 #include <linux/types.h>
84 #include <asm/atomic.h>
85 #include <asm/sigp.h>
86
87
88 struct _lowcore
89 {
90 /* prefix area: defined by architecture */
91 psw_t restart_psw; /* 0x000 */
92 __u32 ccw2[4]; /* 0x008 */
93 psw_t external_old_psw; /* 0x018 */
94 psw_t svc_old_psw; /* 0x020 */
95 psw_t program_old_psw; /* 0x028 */
96 psw_t mcck_old_psw; /* 0x030 */
97 psw_t io_old_psw; /* 0x038 */
98 __u8 pad1[0x58-0x40]; /* 0x040 */
99 psw_t external_new_psw; /* 0x058 */
100 psw_t svc_new_psw; /* 0x060 */
101 psw_t program_new_psw; /* 0x068 */
102 psw_t mcck_new_psw; /* 0x070 */
103 psw_t io_new_psw; /* 0x078 */
104 __u32 ext_params; /* 0x080 */
105 __u16 cpu_addr; /* 0x084 */
106 __u16 ext_int_code; /* 0x086 */
107 __u16 svc_ilc; /* 0x088 */
108 __u16 scv_code; /* 0x08a */
109 __u16 pgm_ilc; /* 0x08c */
110 __u16 pgm_code; /* 0x08e */
111 __u32 trans_exc_code; /* 0x090 */
112 __u16 mon_class_num; /* 0x094 */
113 __u16 per_perc_atmid; /* 0x096 */
114 __u32 per_address; /* 0x098 */
115 __u32 monitor_code; /* 0x09c */
116 __u8 exc_access_id; /* 0x0a0 */
117 __u8 per_access_id; /* 0x0a1 */
118 __u8 pad2[0xB8-0xA2]; /* 0x0a2 */
119 __u16 subchannel_id; /* 0x0b8 */
120 __u16 subchannel_nr; /* 0x0ba */
121 __u32 io_int_parm; /* 0x0bc */
122 __u8 pad3[0xD8-0xC0]; /* 0x0c0 */
123 __u32 cpu_timer_save_area[2]; /* 0x0d8 */
124 __u32 clock_comp_save_area[2]; /* 0x0e0 */
125 __u32 mcck_interuption_code[2]; /* 0x0e8 */
126 __u8 pad4[0xf4-0xf0]; /* 0x0f0 */
127 __u32 external_damage_code; /* 0x0f4 */
128 __u32 failing_storage_address; /* 0x0f8 */
129 __u8 pad5[0x100-0xfc]; /* 0x0fc */
130 __u32 st_status_fixed_logout[4];/* 0x100 */
131 __u8 pad6[0x160-0x110]; /* 0x110 */
132 __u32 floating_pt_save_area[8]; /* 0x160 */
133 __u32 gpregs_save_area[16]; /* 0x180 */
134 __u8 pad7[0x200-0x1c0]; /* 0x1c0 */
135
136 __u32 access_regs_save_area[16];/* 0x200 */
137 __u32 cregs_save_area[16]; /* 0x240 */
138 psw_t return_psw; /* 0x280 */
139 __u8 pad8[0x400-0x288]; /* 0x288 */
140
141 __u32 sync_io_word; /* 0x400 */
142
143 __u8 pad9[0xc00-0x404]; /* 0x404 */
144
145 /* System info area */
146 __u32 save_area[16]; /* 0xc00 */
147 __u32 kernel_stack; /* 0xc40 */
148 __u32 kernel_level; /* 0xc44 */
149 /* entry.S sensitive area start */
150 /* Next 6 words are the s390 equivalent of irq_stat */
151 __u32 __softirq_active; /* 0xc48 */
152 __u32 __softirq_mask; /* 0xc4c */
153 __u32 __local_irq_count; /* 0xc50 */
154 __u32 __local_bh_count; /* 0xc54 */
155 __u32 __syscall_count; /* 0xc58 */
156 __u8 pad10[0xc60-0xc5c]; /* 0xc5c */
157 struct cpuinfo_S390 cpu_data; /* 0xc60 */
158 __u32 ipl_device; /* 0xc7c */
159 /* entry.S sensitive area end */
160
161 /* SMP info area: defined by DJB */
162 __u64 jiffy_timer_cc; /* 0xc80 */
163 atomic_t ext_call_fast; /* 0xc88 */
164 atomic_t ext_call_queue; /* 0xc8c */
165 atomic_t ext_call_count; /* 0xc90 */
166
167 /* Align SMP info to the top 1k of prefix area */
168 __u8 pad11[0x1000-0xc94]; /* 0xc94 */
169 } __attribute__((packed)); /* End structure*/
170
171 extern __inline__ void set_prefix(__u32 address)
172 {
173 __asm__ __volatile__ ("spx %0" : : "m" (address) : "memory" );
174 }
175
176 #define S390_lowcore (*((struct _lowcore *) 0))
177 extern struct _lowcore *lowcore_ptr[];
178
179 #ifndef CONFIG_SMP
180 #define get_cpu_lowcore(cpu) S390_lowcore
181 #define safe_get_cpu_lowcore(cpu) S390_lowcore
182 #else
183 #define get_cpu_lowcore(cpu) (*lowcore_ptr[cpu])
184 #define safe_get_cpu_lowcore(cpu) \
185 ((cpu)==smp_processor_id() ? S390_lowcore:(*lowcore_ptr[(cpu)]))
186 #endif
187 #endif /* __ASSEMBLY__ */
188
189 #endif
190
191
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