sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-21 12:30:20 +03:00
Code Issues Packages Projects Releases Wiki Activity

[uaccess] Formalise the uaccess API

Browse Source 
The userptr_t is now the fundamental type that gets used for conversions.
For example, virt_to_phys() is implemented in terms of virt_to_user() and
user_to_phys().
This commit is contained in:
Michael Brown
2008-10-13 03:47:33 +01:00
parent 667819becc
commit 6554b79ff9
21 changed files with 569 additions and 760 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/include/gpxe/io.h
View File

@@ -19,6 +19,7 @@
#include <stdint.h>
#include <gpxe/api.h>
#include <config/ioapi.h>
#include <gpxe/uaccess.h>
/**
* Calculate static inline I/O API function name
@@ -149,24 +150,20 @@
} while ( 0 )
/**
* Convert virtual address to a physical address
* Convert physical address to a bus address
*
* @v addr Virtual address
* @ret phys_addr Physical address
* @v phys_addr Physical address
* @ret bus_addr Bus address
*/
unsigned long virt_to_phys ( volatile const void *addr );
unsigned long phys_to_bus ( unsigned long phys_addr );
/**
* Convert physical address to a virtual address
* Convert bus address to a physical address
*
* @v addr Virtual address
* @v bus_addr Bus address
* @ret phys_addr Physical address
*
* This operation isn't actually valid within our memory model, and is
* impossible to achieve under -DKEEP_IT_REAL. Some drivers haven't
* been updated to avoid it yet, though.
*/
void * phys_to_virt ( unsigned long phys_addr );
unsigned long bus_to_phys ( unsigned long bus_addr );
/**
* Convert virtual address to a bus address
@@ -174,7 +171,10 @@ void * phys_to_virt ( unsigned long phys_addr );
* @v addr Virtual address
* @ret bus_addr Bus address
*/
unsigned long virt_to_bus ( volatile const void *addr );
static inline __always_inline unsigned long
virt_to_bus ( volatile const void *addr ) {
return phys_to_bus ( virt_to_phys ( addr ) );
}
/**
* Convert bus address to a virtual address
@@ -182,11 +182,11 @@ unsigned long virt_to_bus ( volatile const void *addr );
* @v bus_addr Bus address
* @ret addr Virtual address
*
* This operation isn't actually valid within our memory model, and is
* impossible to achieve under -DKEEP_IT_REAL. Some drivers haven't
* been updated to avoid it yet, though.
* This operation is not available under all memory models.
*/
void * bus_to_virt ( unsigned long bus_addr );
static inline __always_inline void * bus_to_virt ( unsigned long bus_addr ) {
return phys_to_virt ( bus_to_phys ( bus_addr ) );
}
/**
* Map bus address as an I/O address