d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add pmap_mapdev and pmap_unmapdev.

Browse Source
This commit is contained in:
Benno Rice 2002-06-29 09:45:59 +00:00
parent 0d29067503
commit 8bbfa33a79
4 changed files with 131 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
sys/powerpc/aim/mmu_oea.c
View File

@ -2272,3 +2272,46 @@ pmap_clear_bit(vm_page_t m, int ptebit)
return ((rv & ptebit) != 0);
}
/*
* Map a set of physical memory pages into the kernel virtual
* address space. Return a pointer to where it is mapped. This
* routine is intended to be used for mapping device memory,
* NOT real memory.
*/
void *
pmap_mapdev(vm_offset_t pa, vm_size_t size)
{
vm_offset_t va, tmpva, offset;
pa = trunc_page(pa);
offset = pa & PAGE_MASK;
size = roundup(offset + size, PAGE_SIZE);
GIANT_REQUIRED;
va = kmem_alloc_pageable(kernel_map, size);
if (!va)
panic("pmap_mapdev: Couldn't alloc kernel virtual memory");
for (tmpva = va; size > 0;) {
pmap_kenter(tmpva, pa);
TLBIE(tmpva); /* XXX or should it be invalidate-all ? */
size -= PAGE_SIZE;
tmpva += PAGE_SIZE;
pa += PAGE_SIZE;
}
return ((void *)(va + offset));
}
void
pmap_unmapdev(vm_offset_t va, vm_size_t size)
{
vm_offset_t base, offset;
base = trunc_page(va);
offset = va & PAGE_MASK;
size = roundup(offset + size, PAGE_SIZE);
kmem_free(kernel_map, base, size);
}

2
sys/powerpc/include/pmap.h
View File

@ -68,6 +68,8 @@ extern struct pmap kernel_pmap_store;
#ifdef _KERNEL
void pmap_bootstrap(vm_offset_t, vm_offset_t);
void *pmap_mapdev(vm_offset_t, vm_size_t);
void pmap_unmapdev(vm_offset_t, vm_size_t);
void pmap_deactivate(struct thread *);
vm_offset_t pmap_kextract(vm_offset_t);

43
sys/powerpc/powerpc/mmu_oea.c
View File

@ -2272,3 +2272,46 @@ pmap_clear_bit(vm_page_t m, int ptebit)
return ((rv & ptebit) != 0);
}
/*
* Map a set of physical memory pages into the kernel virtual
* address space. Return a pointer to where it is mapped. This
* routine is intended to be used for mapping device memory,
* NOT real memory.
*/
void *
pmap_mapdev(vm_offset_t pa, vm_size_t size)
{
vm_offset_t va, tmpva, offset;
pa = trunc_page(pa);
offset = pa & PAGE_MASK;
size = roundup(offset + size, PAGE_SIZE);
GIANT_REQUIRED;
va = kmem_alloc_pageable(kernel_map, size);
if (!va)
panic("pmap_mapdev: Couldn't alloc kernel virtual memory");
for (tmpva = va; size > 0;) {
pmap_kenter(tmpva, pa);
TLBIE(tmpva); /* XXX or should it be invalidate-all ? */
size -= PAGE_SIZE;
tmpva += PAGE_SIZE;
pa += PAGE_SIZE;
}
return ((void *)(va + offset));
}
void
pmap_unmapdev(vm_offset_t va, vm_size_t size)
{
vm_offset_t base, offset;
base = trunc_page(va);
offset = va & PAGE_MASK;
size = roundup(offset + size, PAGE_SIZE);
kmem_free(kernel_map, base, size);
}

43
sys/powerpc/powerpc/pmap.c
View File

@ -2272,3 +2272,46 @@ pmap_clear_bit(vm_page_t m, int ptebit)
return ((rv & ptebit) != 0);
}
/*
* Map a set of physical memory pages into the kernel virtual
* address space. Return a pointer to where it is mapped. This
* routine is intended to be used for mapping device memory,
* NOT real memory.
*/
void *
pmap_mapdev(vm_offset_t pa, vm_size_t size)
{
vm_offset_t va, tmpva, offset;
pa = trunc_page(pa);
offset = pa & PAGE_MASK;
size = roundup(offset + size, PAGE_SIZE);
GIANT_REQUIRED;
va = kmem_alloc_pageable(kernel_map, size);
if (!va)
panic("pmap_mapdev: Couldn't alloc kernel virtual memory");
for (tmpva = va; size > 0;) {
pmap_kenter(tmpva, pa);
TLBIE(tmpva); /* XXX or should it be invalidate-all ? */
size -= PAGE_SIZE;
tmpva += PAGE_SIZE;
pa += PAGE_SIZE;
}
return ((void *)(va + offset));
}
void
pmap_unmapdev(vm_offset_t va, vm_size_t size)
{
vm_offset_t base, offset;
base = trunc_page(va);
offset = va & PAGE_MASK;
size = roundup(offset + size, PAGE_SIZE);
kmem_free(kernel_map, base, size);
}