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Pager virtual address pool bookkeeping added for all pager virtual addresses

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Previously virt_to_phys/phys_to_virt macros were used such that they did a
blind offset translation for creating a pager internal virtual address for
user mappings.

This is now changed such that a properly bookkeeped virtual address pool is
used which will avoid any clashes on the virtual space.
This commit is contained in:
Bahadir Balban
2009-08-19 14:44:36 +03:00
parent d351d6846a
commit 95b7b65c89
11 changed files with 94 additions and 46 deletions
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11
tasks/libl4/include/l4lib/arch-arm/syslib.h
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@@ -263,14 +263,18 @@ static inline int l4_ipc_return(int retval)
return l4_ipc(sender, L4_NILTHREAD, 0);
}
void *l4_new_virtual(int npages);
void *l4_del_virtual(void *virt, int npages);
/* A helper that translates and maps a physical address to virtual */
static inline void *l4_map_helper(void *phys, int npages)
{
struct task_ids ids;
void *virt = l4_new_virtual(npages);
l4_getid(&ids);
l4_map(phys, phys_to_virt(phys), npages, MAP_USR_RW_FLAGS, ids.tid);
return phys_to_virt(phys);
l4_map(phys, virt, npages, MAP_USR_RW_FLAGS, ids.tid);
return virt;
}
@@ -281,7 +285,8 @@ static inline void *l4_unmap_helper(void *virt, int npages)
l4_getid(&ids);
l4_unmap(virt, npages, ids.tid);
return virt_to_phys(virt);
l4_del_virtual(virt, npages);
return 0;
}
#endif /* __L4LIB_SYSLIB_H__ */