From 09705ab72457423fc88672cda932f474fee0cfbe Mon Sep 17 00:00:00 2001 From: Kyösti Mälkki Date: Sat, 21 Mar 2015 11:11:58 +0200 Subject: AMD K8 fam10: Use parent subordinate to track HT enumeration MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: I930f2beacdc95d0a7edd07db66a1c2e58bb2f3cd Signed-off-by: Kyösti Mälkki Reviewed-on: http://review.coreboot.org/8566 Tested-by: build bot (Jenkins) Reviewed-by: Timothy Pearson --- src/northbridge/amd/agesa/family10/northbridge.c | 3 -- src/northbridge/amd/agesa/family15/northbridge.c | 4 --- src/northbridge/amd/amdfam10/northbridge.c | 36 +++++++++++------------ src/northbridge/amd/amdk8/northbridge.c | 37 ++++++++++++------------ 4 files changed, 37 insertions(+), 43 deletions(-) (limited to 'src') diff --git a/src/northbridge/amd/agesa/family10/northbridge.c b/src/northbridge/amd/agesa/family10/northbridge.c index 0fe1910577..5938e3275d 100644 --- a/src/northbridge/amd/agesa/family10/northbridge.c +++ b/src/northbridge/amd/agesa/family10/northbridge.c @@ -561,7 +561,6 @@ static void amdfam10_scan_chains(device_t dev) unsigned sblink = sysconf.sblk; device_t io_hub = NULL; u32 next_unitid = 0xff; - unsigned int max = dev->bus->subordinate; nodeid = amdfam10_nodeid(dev); if (nodeid == 0) { @@ -578,8 +577,6 @@ static void amdfam10_scan_chains(device_t dev) } max = dev->bus->subordinate; } - - dev->bus->subordinate = max; } static struct device_operations northbridge_operations = { diff --git a/src/northbridge/amd/agesa/family15/northbridge.c b/src/northbridge/amd/agesa/family15/northbridge.c index 94e16acea6..f13e3981af 100644 --- a/src/northbridge/amd/agesa/family15/northbridge.c +++ b/src/northbridge/amd/agesa/family15/northbridge.c @@ -465,7 +465,6 @@ static void scan_chains(device_t dev) struct bus *link; device_t io_hub = NULL; u32 next_unitid = 0x18; - unsigned int max = dev->bus->subordinate; nodeid = amdfam15_nodeid(dev); if (nodeid == 0) { @@ -481,10 +480,7 @@ static void scan_chains(device_t dev) pci_scan_bus(link, 0x00, ((next_unitid - 1) << 3) | 7); } } - max = dev->bus->subordinate; } - - dev->bus->subordinate = max; } diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c index bcb6e3f936..e9d12c78e0 100644 --- a/src/northbridge/amd/amdfam10/northbridge.c +++ b/src/northbridge/amd/amdfam10/northbridge.c @@ -152,6 +152,15 @@ static void ht_route_link(struct bus *link, scan_state mode) struct bus *parent = link->dev->bus; u32 busses; + if (mode == HT_ROUTE_SCAN) { + if (parent->subordinate == 0) + link->secondary = 0; + else + link->secondary = parent->subordinate + 1; + + link->subordinate = link->secondary; + } + /* Configure the bus numbers for this bridge: the configuration * transactions will not be propagated by the bridge if it is * not correctly configured @@ -170,9 +179,15 @@ static void ht_route_link(struct bus *link, scan_state mode) } pci_write_config32(link->dev, link->cap + 0x14, busses); + if (mode == HT_ROUTE_FINAL) { + if (CONFIG_HT_CHAIN_DISTRIBUTE) + parent->subordinate = ALIGN_UP(link->subordinate, 8) - 1; + else + parent->subordinate = link->subordinate; + } } -static u32 amdfam10_scan_chain(struct bus *link, u32 max) +static void amdfam10_scan_chain(struct bus *link) { unsigned int next_unitid; @@ -180,23 +195,13 @@ static u32 amdfam10_scan_chain(struct bus *link, u32 max) * register in function 1. */ if (get_ht_c_index(link) >= 4) - return max; + return; /* Set up the primary, secondary and subordinate bus numbers. * We have no idea how many busses are behind this bridge yet, * so we set the subordinate bus number to 0xff for the moment. */ - if (max != 0) - max++; - - /* One node can have 8 link and segn is the same. */ - if (CONFIG_HT_CHAIN_DISTRIBUTE) - max = ALIGN_UP(max, 8); - - link->secondary = max; - link->subordinate = link->secondary; - ht_route_link(link, HT_ROUTE_SCAN); /* set the config map space */ @@ -224,8 +229,6 @@ static u32 amdfam10_scan_chain(struct bus *link, u32 max) set_config_map_reg(link); store_ht_c_conf_bus(link); - - return link->subordinate; } /* Do sb ht chain at first, in case s2885 put sb chain @@ -269,17 +272,14 @@ static void trim_ht_chain(struct device *dev) static void amdfam10_scan_chains(device_t dev) { struct bus *link; - unsigned int max = dev->bus->subordinate; /* Do sb ht chain at first, in case s2885 put sb chain (8131/8111) on link2, but put 8151 on link0 */ trim_ht_chain(dev); for (link = dev->link_list; link; link = link->next) { if (link->ht_link_up) - max = amdfam10_scan_chain(link, max); + amdfam10_scan_chain(link); } - - dev->bus->subordinate = max; } diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c index 1c62647eb3..9b5735f3dd 100644 --- a/src/northbridge/amd/amdk8/northbridge.c +++ b/src/northbridge/amd/amdk8/northbridge.c @@ -91,6 +91,15 @@ static void ht_route_link(struct bus *link, scan_state mode) struct bus *parent = dev->bus; u32 busses; + if (mode == HT_ROUTE_SCAN) { + if (link->dev->bus->subordinate == 0) + link->secondary = 0; + else + link->secondary = parent->subordinate + 1; + + link->subordinate = link->secondary; + } + /* Configure the bus numbers for this bridge: the configuration * transactions will not be propagated by the bridge if it is * not correctly configured @@ -109,6 +118,13 @@ static void ht_route_link(struct bus *link, scan_state mode) } pci_write_config32(link->dev, link->cap + 0x14, busses); + if (mode == HT_ROUTE_FINAL) { + /* Second chain will be on 0x40, third 0x80, forth 0xc0. */ + if (CONFIG_HT_CHAIN_DISTRIBUTE) + parent->subordinate = ALIGN_UP(link->subordinate, 0x40) - 1; + else + parent->subordinate = link->subordinate; + } } static u32 amdk8_nodeid(device_t dev) @@ -116,7 +132,7 @@ static u32 amdk8_nodeid(device_t dev) return (dev->path.pci.devfn >> 3) - 0x18; } -static u32 amdk8_scan_chain(struct bus *link, u32 max) +static void amdk8_scan_chain(struct bus *link) { unsigned int next_unitid; int index; @@ -148,7 +164,7 @@ static u32 amdk8_scan_chain(struct bus *link, u32 max) * register skip this bus */ if (config_reg > 0xec) { - return max; + return; } /* Set up the primary, secondary and subordinate bus numbers. @@ -156,16 +172,6 @@ static u32 amdk8_scan_chain(struct bus *link, u32 max) * so we set the subordinate bus number to 0xff for the moment. */ - if (max != 0) - max++; - - /* Second chain will be on 0x40, third 0x80, forth 0xc0. */ - if (CONFIG_HT_CHAIN_DISTRIBUTE) - max = ALIGN_UP(max, 0x40); - - link->secondary = max; - link->subordinate = link->secondary; - ht_route_link(link, HT_ROUTE_SCAN); config_busses = f1_read_config32(config_reg); @@ -199,8 +205,6 @@ static u32 amdk8_scan_chain(struct bus *link, u32 max) index = (config_reg-0xe0) >> 2; sysconf.hcdn_reg[index] = link->hcdn_reg; - - return link->subordinate; } /* Do sb ht chain at first, in case s2885 put sb chain @@ -244,16 +248,13 @@ static void trim_ht_chain(struct device *dev) static void amdk8_scan_chains(device_t dev) { struct bus *link; - unsigned int max = dev->bus->subordinate; trim_ht_chain(dev); for (link = dev->link_list; link; link = link->next) { if (link->ht_link_up) - max = amdk8_scan_chain(link, max); + amdk8_scan_chain(link); } - - dev->bus->subordinate = max; } -- cgit v1.2.3