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This patch adds the domain's resources and all links to the tree traversal for

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constraining resources.  Build and boot tested on qemu, serengeti, and
alix2c3.

Signed-off-by: Myles Watson <mylesgw@gmail.com>
Acked-by: Ward Vandewege <ward@gnu.org>


git-svn-id: svn://coreboot.org/repository/coreboot-v3@1112 f3766cd6-281f-0410-b1cd-43a5c92072e9
This commit is contained in:
Myles Watson 2009-01-09 14:17:06 +00:00
commit 7f6b02dcb1
1 changed files with 32 additions and 31 deletions
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63
device/device.c
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@ -705,41 +705,42 @@ static void constrain_resources(struct device *dev, struct constraints* limits)
#define MEM_TYPE (IORESOURCE_MEM)
#define IO_TYPE (IORESOURCE_IO)
/* Descend into every child and look for fixed resources. */
for (child=dev->link[0].children; child; child = child->sibling) {
constrain_resources(child, limits);
for (i = 0; i<child->resources; i++) {
res = &child->resource[i];
if (!(res->flags & IORESOURCE_FIXED))
continue;
/* Constrain limits based on the fixed resources of this device. */
for (i = 0; i<dev->resources; i++) {
res = &dev->resource[i];
if (!(res->flags & IORESOURCE_FIXED))
continue;
/* PREFETCH, MEM, or I/O - skip any others. */
if ((res->flags & MEM_MASK) == PREF_TYPE)
lim = &limits->pref;
else if ((res->flags & MEM_MASK) == MEM_TYPE)
lim = &limits->mem;
else if ((res->flags & IO_MASK) == IO_TYPE)
lim = &limits->io;
else
continue;
/* PREFETCH, MEM, or I/O - skip any others. */
if ((res->flags & MEM_MASK) == PREF_TYPE)
lim = &limits->pref;
else if ((res->flags & MEM_MASK) == MEM_TYPE)
lim = &limits->mem;
else if ((res->flags & IO_MASK) == IO_TYPE)
lim = &limits->io;
else
continue;
/* Is it already outside the limits? */
if (res->size &&
(((res->base + res->size -1) < lim->base) ||
(res->base > lim->limit)))
continue;
/* Is it already outside the limits? */
if (res->size && (((res->base + res->size -1) < lim->base) ||
(res->base > lim->limit)))
continue;
/* Choose to be above or below fixed resources. This
* check is signed so that "negative" amounts of space
* are handled correctly.
*/
if ((s64)(lim->limit - (res->base + res->size -1)) >
(s64)(res->base - lim->base))
lim->base = res->base + res->size;
else
lim->limit = res->base -1;
}
/* Choose to be above or below fixed resources. This
* check is signed so that "negative" amounts of space
* are handled correctly.
*/
if ((s64)(lim->limit - (res->base + res->size -1)) >
(s64)(res->base - lim->base))
lim->base = res->base + res->size;
else
lim->limit = res->base -1;
}
/* Descend into every child and look for fixed resources. */
for (i = 0; i< dev->links; i++)
for (child=dev->link[i].children; child; child = child->sibling)
constrain_resources(child, limits);
}
static void avoid_fixed_resources(struct device *dev)