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include/s390.h: add STATIC_ASSERTION for size of lowcore

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This helps to find possible bugs earlier, e.g. possible bugs in the
changes in the upcoming patches.

Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Stefan Haberland <sth@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Marc Hartmayer
2022-02-28 13:45:10 +00:00
committed by Jan Höppner
parent 5ac171d224
commit 47fcc71f96
1 changed files with 3 additions and 0 deletions
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3
include/boot/s390.h
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@@ -16,6 +16,8 @@
#define __LC_IPLDEV 0x0c6c
#define __LC_OS_INFO 0x0e18
#define LOWCORE_SIZE _AC(0x2000, UL)
#define PAGE_SIZE _AC(4096, UL)
/* Minimum size of a stack frame in bytes */
@@ -210,6 +212,7 @@ struct _lowcore {
/* align to the top of the prefix area */
uint8_t pad_0x1900[0x2000-0x1900]; /* 0x1900 */
} __packed __aligned(8192);
STATIC_ASSERT(sizeof(struct _lowcore) == LOWCORE_SIZE)
#define S390_lowcore (*((struct _lowcore *) 0))