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Add phys_to_user() and copy_user().

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This commit is contained in:
Michael Brown 2007-01-11 14:01:20 +00:00
parent fbfed96965
commit c6a4055fae
1 changed files with 29 additions and 2 deletions
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31
src/arch/i386/include/librm.h
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@ -120,7 +120,7 @@ typedef intptr_t userptr_t;
*/
static inline __attribute__ (( always_inline )) void
copy_to_user ( userptr_t buffer, off_t offset, const void *src, size_t len ) {
memcpy ( ( void * ) buffer + offset, src, len );
memcpy ( ( ( void * ) buffer + offset ), src, len );
}
/**
@ -133,7 +133,23 @@ copy_to_user ( userptr_t buffer, off_t offset, const void *src, size_t len ) {
*/
static inline __attribute__ (( always_inline )) void
copy_from_user ( void *dest, userptr_t buffer, off_t offset, size_t len ) {
memcpy ( dest, ( void * ) buffer + offset, len );
memcpy ( dest, ( ( void * ) buffer + offset ), len );
}
/**
* Copy data between user buffers
*
* @v dest Destination user buffer
* @v dest_off Offset within destination buffer
* @v src Source user buffer
* @v src_off Offset within source buffer
* @v len Length
*/
static inline __attribute__ (( always_inline )) void
copy_user ( userptr_t dest, off_t dest_off, userptr_t src, off_t src_off,
size_t len ) {
memcpy ( ( ( void * ) dest + dest_off ), ( ( void * ) src + src_off ),
len );
}
/**
@ -163,6 +179,17 @@ real_to_user ( unsigned int segment, unsigned int offset ) {
return virt_to_user ( VIRTUAL ( segment, offset ) );
}
/**
* Convert physical address to user buffer
*
* @v physical Physical address
* @ret buffer User buffer
*/
static inline __attribute__ (( always_inline )) userptr_t
phys_to_user ( physaddr_t physical ) {
return virt_to_user ( phys_to_virt ( physical ) );
}
/* Copy to/from real-mode stack */
extern uint16_t copy_to_rm_stack ( void *data, size_t size );
extern void remove_from_rm_stack ( void *data, size_t size );