diff options
Diffstat (limited to 'src/northbridge')
| -rw-r--r-- | src/northbridge/amd/amdk8/misc_control.c | 66 |
1 files changed, 43 insertions, 23 deletions
diff --git a/src/northbridge/amd/amdk8/misc_control.c b/src/northbridge/amd/amdk8/misc_control.c index e6cfe01cfc..0fe2cc5460 100644 --- a/src/northbridge/amd/amdk8/misc_control.c +++ b/src/northbridge/amd/amdk8/misc_control.c @@ -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++; @@ -46,36 +60,42 @@ static void mcf3_read_resources(device_t dev) } } +static void set_agp_aperture(device_t dev, struct resource *resource) +{ + device_t pdev; + uint32_t base; + uint32_t size; + + 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)) { + 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); + + printk_debug("%s %02x <- [0x%08lx - 0x%08lx] mem <gart>\n", + dev_path(pdev), resource->index, resource->base, + resource->base + resource->size - 1); + } + /* 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) { - device_t pdev; - uint32_t base; - uint32_t size; - - size = (0<<6)|(0<<5)|(0<<4)| - ((log2(resource->size) - 25) << 1)|(0<<0); - base = ((resource->base) >> 25) & 0x00007fff; - pdev = 0; - 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, 0x94, base); - /* Don't set the GART Table base address */ - pci_write_config32(pdev, 0x98, 0); - - printk_debug("%s %02x <- [0x%08lx - 0x%08lx] mem <gart>\n", - dev_path(pdev), resource->index, resource->base, - resource->base + resource->size - 1); - } - /* Remember this resource has been stored */ - resource->flags |= IORESOURCE_STORED; + set_agp_aperture(dev, resource); } } + /* Set the generic PCI resources */ pci_dev_set_resources(dev); } |