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refactored mcf3_set_resources 

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1564 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Li-Ta Lo 2004-05-14 17:23:26 +00:00
parent 54f05f6c5c
commit d34b943d36
1 changed files with 43 additions and 23 deletions
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42
src/northbridge/amd/amdk8/misc_control.c
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@ -18,6 +18,20 @@
#include "./cpu_rev.c"
#include "amdk8.h"
/**
* @brief Read resources for AGP aperture
*
* @param
*
* There is only one AGP aperture resource needed. The resoruce is added to
* the northbridge of BSP.
*
* The same trick can be used to augment legacy VGA resources which can
* be detect by generic pci reousrce allocator for VGA devices.
* BAD: it is more tricky than I think, the resource allocation code is
* implemented in a way to NOT DOING legacy VGA resource allcation on
* purpose :-(.
*/
static void mcf3_read_resources(device_t dev)
{
struct resource *resource;
@ -30,7 +44,7 @@ static void mcf3_read_resources(device_t dev)
return;
}
/* Add a 64M Gart apeture resource */
/* Add a Gart apeture resource */
if (dev->resources < MAX_RESOURCES) {
resource = &dev->resource[dev->resources];
dev->resources++;
@ -46,24 +60,19 @@ static void mcf3_read_resources(device_t dev)
}
}
static void mcf3_set_resources(device_t dev)
static void set_agp_aperture(device_t dev, struct resource *resource)
{
struct resource *resource, *last;
last = &dev->resource[dev->resources];
for (resource = &dev->resource[0]; resource < last; resource++) {
if (resource->index == 0x94) {
device_t pdev;
uint32_t base;
uint32_t size;
size = (0<<6)|(0<<5)|(0<<4)|
((log2(resource->size) - 25) << 1)|(0<<0);
size = (0<<6)|(0<<5)|(0<<4)| ((log2(resource->size) - 25) << 1)|(0<<0);
base = ((resource->base) >> 25) & 0x00007fff;
pdev = 0;
/* A search for MISC Control device is neceressary */
while (pdev = dev_find_device(PCI_VENDOR_ID_AMD, 0x1103, pdev)) {
/* I want a 64M GART apeture */
pci_write_config32(pdev, 0x90, (0<<6)|(0<<5)|(0<<4)|(1<<1)|(0<<0));
/* Store the GART base address */
pci_write_config32(pdev, 0x90, size);
pci_write_config32(pdev, 0x94, base);
/* Don't set the GART Table base address */
pci_write_config32(pdev, 0x98, 0);
@ -75,7 +84,18 @@ static void mcf3_set_resources(device_t dev)
/* Remember this resource has been stored */
resource->flags |= IORESOURCE_STORED;
}
static void mcf3_set_resources(device_t dev)
{
struct resource *resource, *last;
last = &dev->resource[dev->resources];
for (resource = &dev->resource[0]; resource < last; resource++) {
if (resource->index == 0x94) {
set_agp_aperture(dev, resource);
}
}
/* Set the generic PCI resources */
pci_dev_set_resources(dev);
}