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Added user_to_phys() and memset_user().

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This commit is contained in:
Michael Brown 2007-01-11 14:27:27 +00:00
parent c980cdd0aa
commit ceca6b185c
1 changed files with 45 additions and 20 deletions
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65
src/arch/i386/include/librm.h
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@ -113,10 +113,10 @@ typedef intptr_t userptr_t;
/**
* Copy data to user buffer
*
* @v buffer User buffer
* @v offset Offset within user buffer
* @v src Source
* @v len Length
* @v buffer User buffer
* @v offset Offset within user buffer
* @v src Source
* @v len Length
*/
static inline __attribute__ (( always_inline )) void
copy_to_user ( userptr_t buffer, off_t offset, const void *src, size_t len ) {
@ -126,10 +126,10 @@ copy_to_user ( userptr_t buffer, off_t offset, const void *src, size_t len ) {
/**
* Copy data from user buffer
*
* @v dest Destination
* @v buffer User buffer
* @v offset Offset within user buffer
* @v len Length
* @v dest Destination
* @v buffer User buffer
* @v offset Offset within user buffer
* @v len Length
*/
static inline __attribute__ (( always_inline )) void
copy_from_user ( void *dest, userptr_t buffer, off_t offset, size_t len ) {
@ -139,11 +139,11 @@ copy_from_user ( void *dest, userptr_t buffer, off_t offset, size_t 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
* @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,
@ -152,11 +152,24 @@ copy_user ( userptr_t dest, off_t dest_off, userptr_t src, off_t src_off,
len );
}
/**
* Fill user buffer with a constant byte
*
* @v buffer User buffer
* @v offset Offset within buffer
* @v c Constant byte with which to fill
* @v len Length
*/
static inline __attribute__ (( always_inline )) void
memset_user ( userptr_t buffer, off_t offset, int c, size_t len ) {
memset ( ( ( void * ) buffer + offset ), c, len );
}
/**
* Convert virtual address to user buffer
*
* @v virtual Virtual address
* @ret buffer User buffer
* @v virtual Virtual address
* @ret buffer User buffer
*
* This constructs a user buffer from an ordinary pointer. Use it
* when you need to pass a pointer to an internal buffer to a function
@ -170,9 +183,9 @@ virt_to_user ( void * virtual ) {
/**
* Convert segment:offset address to user buffer
*
* @v segment Real-mode segment
* @v offset Real-mode offset
* @ret buffer User buffer
* @v segment Real-mode segment
* @v offset Real-mode offset
* @ret buffer User buffer
*/
static inline __attribute__ (( always_inline )) userptr_t
real_to_user ( unsigned int segment, unsigned int offset ) {
@ -182,14 +195,26 @@ real_to_user ( unsigned int segment, unsigned int offset ) {
/**
* Convert physical address to user buffer
*
* @v physical Physical address
* @ret buffer 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 ) );
}
/**
* Convert user buffer to physical address
*
* @v buffer User buffer
* @v offset Offset within user buffer
* @ret physical Physical address
*/
static inline __attribute__ (( always_inline )) physaddr_t
user_to_phys ( userptr_t buffer, off_t offset ) {
return virt_to_phys ( ( void * ) buffer + offset );
}
/* 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 );