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author | H. Peter Anvin <hpa@zytor.com> | 2008-09-04 08:09:09 -0700 |
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committer | H. Peter Anvin <hpa@zytor.com> | 2008-09-04 08:09:09 -0700 |
commit | 0ccd8c39bc664bf5e9fcc26caad50cc17ff866d1 (patch) | |
tree | 29cec0edf3acf18c6978b750a8d6560f445df6df /arch/blackfin/include/asm/l1layout.h | |
parent | 1625324d22409e32e3f8eb86018cad72e1c09d61 (diff) | |
parent | ec0c15afb41fd9ad45b53468b60db50170e22346 (diff) |
Merge branch 'linus' into x86/core
Diffstat (limited to 'arch/blackfin/include/asm/l1layout.h')
-rw-r--r-- | arch/blackfin/include/asm/l1layout.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/l1layout.h b/arch/blackfin/include/asm/l1layout.h new file mode 100644 index 00000000000..c13ded77782 --- /dev/null +++ b/arch/blackfin/include/asm/l1layout.h @@ -0,0 +1,31 @@ +/* + * l1layout.h + * Defines a layout of L1 scratchpad memory that userspace can rely on. + */ + +#ifndef _L1LAYOUT_H_ +#define _L1LAYOUT_H_ + +#include <asm/blackfin.h> + +#ifndef __ASSEMBLY__ + +/* Data that is "mapped" into the process VM at the start of the L1 scratch + memory, so that each process can access it at a fixed address. Used for + stack checking. */ +struct l1_scratch_task_info +{ + /* Points to the start of the stack. */ + void *stack_start; + /* Not updated by the kernel; a user process can modify this to + keep track of the lowest address of the stack pointer during its + runtime. */ + void *lowest_sp; +}; + +/* A pointer to the structure in memory. */ +#define L1_SCRATCH_TASK_INFO ((struct l1_scratch_task_info *)L1_SCRATCH_START) + +#endif + +#endif |