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authorMichael Holzheu <holzheu@de.ibm.com>2007-04-27 10:01:49 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 10:01:44 -0400
commit411ed3225733dbd83b4cbaaa992ef80d6ec1534e (patch)
tree388aeac39e9fad5f7cadcc8fcbf0838811f5829d /include/asm-s390/lowcore.h
parent7039d3a11c4b4b59f9ef933b4b0a28304bdd07d1 (diff)
[S390] zfcpdump support.
s390 machines provide hardware support for creating Linux dumps on SCSI disks. For creating a dump a special purpose dump Linux is used. The first 32 MB of memory are saved by the hardware before the dump Linux is booted. Via an SCLP interface, the saved memory can be accessed from Linux. This patch exports memory and registers of the crashed Linux to userspace via a debugfs file. For more information refer to Documentation/s390/zfcpdump.txt, which is included in this patch. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'include/asm-s390/lowcore.h')
-rw-r--r--include/asm-s390/lowcore.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/include/asm-s390/lowcore.h b/include/asm-s390/lowcore.h
index 4a31d0a7ee83..ffc9788a21a7 100644
--- a/include/asm-s390/lowcore.h
+++ b/include/asm-s390/lowcore.h
@@ -147,6 +147,52 @@ void pgm_check_handler(void);
147void mcck_int_handler(void); 147void mcck_int_handler(void);
148void io_int_handler(void); 148void io_int_handler(void);
149 149
150struct save_area_s390 {
151 u32 ext_save;
152 u64 timer;
153 u64 clk_cmp;
154 u8 pad1[24];
155 u8 psw[8];
156 u32 pref_reg;
157 u8 pad2[20];
158 u32 acc_regs[16];
159 u64 fp_regs[4];
160 u32 gp_regs[16];
161 u32 ctrl_regs[16];
162} __attribute__((packed));
163
164struct save_area_s390x {
165 u64 fp_regs[16];
166 u64 gp_regs[16];
167 u8 psw[16];
168 u8 pad1[8];
169 u32 pref_reg;
170 u32 fp_ctrl_reg;
171 u8 pad2[4];
172 u32 tod_reg;
173 u64 timer;
174 u64 clk_cmp;
175 u8 pad3[8];
176 u32 acc_regs[16];
177 u64 ctrl_regs[16];
178} __attribute__((packed));
179
180union save_area {
181 struct save_area_s390 s390;
182 struct save_area_s390x s390x;
183};
184
185#define SAVE_AREA_BASE_S390 0xd4
186#define SAVE_AREA_BASE_S390X 0x1200
187
188#ifndef __s390x__
189#define SAVE_AREA_SIZE sizeof(struct save_area_s390)
190#define SAVE_AREA_BASE SAVE_AREA_BASE_S390
191#else
192#define SAVE_AREA_SIZE sizeof(struct save_area_s390x)
193#define SAVE_AREA_BASE SAVE_AREA_BASE_S390X
194#endif
195
150struct _lowcore 196struct _lowcore
151{ 197{
152#ifndef __s390x__ 198#ifndef __s390x__