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AMD K8 fam10: Relocate SB_HT_CHAIN in devicetree 

When we want to scan the HT chain to southbridge first, we
relocate it as the first item of dev->link_list of node 0.

Change-Id: Ic73ba43aadb3c5e0c8d4b82ed7d41094692ea37f
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/8560
Tested-by: build bot (Jenkins)
Reviewed-by: Nicolas Reinecke <nr@das-labor.org>
Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
This commit is contained in:
Kyösti Mälkki 2015-02-21 14:31:01 +02:00
parent d44a03622e
commit 98a915e262
2 changed files with 72 additions and 19 deletions
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45
src/northbridge/amd/amdfam10/northbridge.c
View File

@ -271,6 +271,36 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool
return link->subordinate;
}
/* Do sb ht chain at first, in case s2885 put sb chain
* (8131/8111) on link2, but put 8151 on link0.
*/
static void relocate_sb_ht_chain(void)
{
struct device *dev;
struct bus *link, *prev = NULL;
u8 sblink;
if (!CONFIG_SB_HT_CHAIN_ON_BUS0)
return;
dev = dev_find_slot(CONFIG_CBB, PCI_DEVFN(CONFIG_CDB, 0));
sblink = (pci_read_config32(dev, 0x64)>>8) & 7;
link = dev->link_list;
while (link) {
if (link->link_num == sblink) {
if (!prev)
return;
prev->next = link->next;
link->next = dev->link_list;
dev->link_list = link;
return;
}
prev = link;
link = link->next;
}
}
static void amdfam10_scan_chains(device_t dev)
{
unsigned nodeid;
@ -283,15 +313,6 @@ static void amdfam10_scan_chains(device_t dev)
/* Do sb ht chain at first, in case s2885 put sb chain (8131/8111) on link2, but put 8151 on link0 */
for (link = dev->link_list; link; link = link->next) {
bool is_sblink = (nodeid == 0) && (link->link_num == sblink);
if ((CONFIG_SB_HT_CHAIN_ON_BUS0 > 0) && is_sblink)
max = amdfam10_scan_chain(dev, nodeid, link, is_sblink, max);
}
for (link = dev->link_list; link; link = link->next) {
bool is_sblink = (nodeid == 0) && (link->link_num == sblink);
if ((CONFIG_SB_HT_CHAIN_ON_BUS0 > 0) && is_sblink)
continue;
max = amdfam10_scan_chain(dev, nodeid, link, is_sblink, max);
}
@ -582,9 +603,15 @@ static const struct pci_driver mcf0_driver __pci_driver = {
.device = 0x1200,
};
static void amdfam10_nb_init(void *chip_info)
{
relocate_sb_ht_chain();
}
struct chip_operations northbridge_amd_amdfam10_ops = {
CHIP_NAME("AMD FAM10 Northbridge")
.enable_dev = 0,
.init = amdfam10_nb_init,
};
static void amdfam10_domain_read_resources(device_t dev)

46
src/northbridge/amd/amdk8/northbridge.c
View File

@ -240,6 +240,36 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_
return link->subordinate;
}
/* Do sb ht chain at first, in case s2885 put sb chain
* (8131/8111) on link2, but put 8151 on link0.
*/
static void relocate_sb_ht_chain(void)
{
struct device *dev;
struct bus *link, *prev = NULL;
u8 sblink;
if (!CONFIG_SB_HT_CHAIN_ON_BUS0)
return;
dev = dev_find_slot(CONFIG_CBB, PCI_DEVFN(CONFIG_CDB, 0));
sblink = (pci_read_config32(dev, 0x64)>>8) & 3;
link = dev->link_list;
while (link) {
if (link->link_num == sblink) {
if (!prev)
return;
prev->next = link->next;
link->next = dev->link_list;
dev->link_list = link;
return;
}
prev = link;
link = link->next;
}
}
static void amdk8_scan_chains(device_t dev)
{
unsigned nodeid;
@ -251,18 +281,8 @@ static void amdk8_scan_chains(device_t dev)
if (nodeid == 0)
sblink = (pci_read_config32(dev, 0x64)>>8) & 3;
// do sb ht chain at first, in case s2885 put sb chain (8131/8111) on link2, but put 8151 on link0
for (link = dev->link_list; link; link = link->next) {
bool is_sblink = (nodeid == 0) && (link->link_num == sblink);
if ((CONFIG_SB_HT_CHAIN_ON_BUS0 > 0) && is_sblink)
max = amdk8_scan_chain(dev, nodeid, link, is_sblink, max);
}
for (link = dev->link_list; link; link = link->next) {
bool is_sblink = (nodeid == 0) && (link->link_num == sblink);
if ((CONFIG_SB_HT_CHAIN_ON_BUS0 > 0) && is_sblink)
continue;
max = amdk8_scan_chain(dev, nodeid, link, is_sblink, max);
}
@ -604,9 +624,15 @@ static const struct pci_driver mcf0_driver __pci_driver = {
.device = 0x1100,
};
static void amdk8_nb_init(void *chip_info)
{
relocate_sb_ht_chain();
}
struct chip_operations northbridge_amd_amdk8_ops = {
CHIP_NAME("AMD K8 Northbridge")
.enable_dev = 0,
.init = amdk8_nb_init,
};
static void amdk8_domain_read_resources(device_t dev)