16 #include <asm/asm-eva.h>
58  * userspace address.  Note that we limit 32-bit userspace to 0x7fff8000 but
60  * we use 0x80000000 here on 32-bit kernels.  If a process passes an invalid
61  * address in this range it's the process's problem, not ours :-)
72 #define get_fs()	(current_thread_info()->addr_limit)
73 #define set_fs(x)	(current_thread_info()->addr_limit = (x))
78  * eva_kernel_access() - determine whether kernel memory access on an EVA system
98  *  - "addr" doesn't have any high-bits set
99  *  - AND "size" doesn't have any high-bits set
100  *  - AND "addr+size" doesn't have any high-bits set
101  *  - OR we are in kernel mode.
110  * access_ok: - Checks if a user space pointer is valid
111  * @addr: User space pointer to start of block to check
117  * Checks if a pointer to a block of memory in user space is valid.
123  * checks that the pointer is in the user space range - after calling
124  * this function, memory access functions may still return -EFAULT.
137  * put_user: - Write a simple value into user space.
138  * @x:	 Value to copy to user space.
139  * @ptr: Destination address, in user space.
144  * This macro copies a single simple value from kernel space to user
145  * space.  It supports simple types like char and int, but not larger
148  * @ptr must have pointer-to-simple-variable type, and @x must be assignable
151  * Returns zero on success, or -EFAULT on error.
157  * get_user: - Get a simple variable from user space.
159  * @ptr: Source address, in user space.
164  * This macro copies a single simple variable from user space to kernel
165  * space.  It supports simple types like char and int, but not larger
168  * @ptr must have pointer-to-simple-variable type, and the result of
171  * Returns zero on success, or -EFAULT on error.
178  * __put_user: - Write a simple value into user space, with less checking.
179  * @x:	 Value to copy to user space.
180  * @ptr: Destination address, in user space.
185  * This macro copies a single simple value from kernel space to user
186  * space.  It supports simple types like char and int, but not larger
189  * @ptr must have pointer-to-simple-variable type, and @x must be assignable
195  * Returns zero on success, or -EFAULT on error.
201  * __get_user: - Get a simple variable from user space, with less checking.
203  * @ptr: Source address, in user space.
208  * This macro copies a single simple variable from user space to kernel
209  * space.  It supports simple types like char and int, but not larger
212  * @ptr must have pointer-to-simple-variable type, and the result of
218  * Returns zero on success, or -EFAULT on error.
246 #define _loadd(reg, addr)	"ld " reg ", " addr  argument
248 #define _loadw(reg, addr)	"lw " reg ", " addr  argument
249 #define _loadh(reg, addr)	"lh " reg ", " addr  argument
250 #define _loadb(reg, addr)	"lb " reg ", " addr  argument
299 	int __gu_err = -EFAULT;						\
331 	: "0" (0), "o" (__m(addr)), "i" (-EFAULT));			\
362 	: "0" (0), "r" (addr), "i" (-EFAULT));				\
382 #define _stored(reg, addr)	"ld " reg ", " addr  argument
385 #define _storew(reg, addr)	"sw " reg ", " addr  argument
386 #define _storeh(reg, addr)	"sh " reg ", " addr  argument
387 #define _storeb(reg, addr)	"sb " reg ", " addr  argument
442 	int __pu_err = -EFAULT;						\
470 	  "i" (-EFAULT));						\
490 	  "i" (-EFAULT));						\
638  * __clear_user: - Zero a block of memory in user space, with less checking.
639  * @to:	  Destination address, in user space.
642  * Zero a block of memory in user space.  Caller must check
699  * strncpy_from_user: - Copy a NUL terminated string from userspace.
700  * @dst:   Destination address, in kernel space.  This buffer must be at
702  * @src:   Source address, in user space.
705  * Copies a NUL-terminated string from userspace to kernel space.
710  * If access to userspace fails, returns -EFAULT (some data may have been
751  * strnlen_user: - Get the size of a string in user space.
757  * Get the size of a NUL-terminated string in user space.