Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/8364
-gerrit
commit e358d64e94175ee080cba81d3f6db2e51439f90d Author: Kyösti Mälkki kyosti.malkki@gmail.com Date: Thu Feb 5 08:12:20 2015 +0200
AMD K8 fam10: Eliminate local variable min_bus
Some cases of max==0xff wrapping around the 8-bit link->secondary register remain to be solved.
Change-Id: I01e2ab6b2f23a03dbac49207ab584eccd1ca9b1f Signed-off-by: Kyösti Mälkki kyosti.malkki@gmail.com --- src/northbridge/amd/amdfam10/northbridge.c | 19 +++++++------------ src/northbridge/amd/amdk8/northbridge.c | 16 +++++++--------- 2 files changed, 14 insertions(+), 21 deletions(-)
diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c index caf5410..efd8a70 100644 --- a/src/northbridge/amd/amdfam10/northbridge.c +++ b/src/northbridge/amd/amdfam10/northbridge.c @@ -199,7 +199,6 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool unsigned int next_unitid; u32 ht_c_index; u32 ht_unitid_base[4]; // here assume only 4 HT device on chain - u32 min_bus; u32 max_devfn;
/* Check for connected link. */ @@ -220,25 +219,21 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool */
if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 0) { - min_bus = ++max; + max++; } else if (is_sblink) { - // first chain will on bus 0 - min_bus = max; /* actually max is 0 here */ + } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 1) { - min_bus = ++max; + max++; } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 > 1) { - // second chain will be on 0x40, third 0x80, forth 0xc0 - // i would refined that to 2, 3, 4 ==> 0, 0x, 40, 0x80, 0xc0 - // >4 will use more segments, // We can have 16 segmment and every segment have 256 bus, // For that case need the kernel support mmio pci config.
/* One node can have 8 link and segn is the same. */ - min_bus = (((max & 0xff) >> 3) + 1) << 3; - max = min_bus; + max++; + max = ALIGN_UP(max, 8); }
- link->secondary = min_bus; + link->secondary = max; link->subordinate = link->secondary;
ht_route_link(link, HT_ROUTE_SCAN); @@ -255,7 +250,7 @@ static u32 amdfam10_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool }
//if ext conf is enabled, only need use 0x1f - if (min_bus == 0) + if (link->secondary == 0) max_devfn = (0x17<<3) | 7; else max_devfn = (0x1f<<3) | 7; diff --git a/src/northbridge/amd/amdk8/northbridge.c b/src/northbridge/amd/amdk8/northbridge.c index b27404e..7826749 100644 --- a/src/northbridge/amd/amdk8/northbridge.c +++ b/src/northbridge/amd/amdk8/northbridge.c @@ -141,7 +141,6 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_ u32 config_busses; u32 free_reg, config_reg; u32 ht_unitid_base[4]; // here assume only 4 HT device on chain - u32 min_bus; u32 max_devfn;
link->cap = 0x80 + (link->link_num * 0x20); @@ -180,19 +179,18 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_ * so we set the subordinate bus number to 0xff for the moment. */ if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 0) { - min_bus = ++max; + max++; } else if (is_sblink) { - // first chain will on bus 0 - min_bus = max; /* actually max is 0 here */ + } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 == 1) { - min_bus = ++max; + max++; } else if (CONFIG_SB_HT_CHAIN_ON_BUS0 > 1) { /* Second chain will be on 0x40, third 0x80, forth 0xc0. */ - min_bus = (max & ~0x3f) + 0x40; - max = min_bus; + max++; + max = ALIGN_UP(max, 0x40); }
- link->secondary = min_bus; + link->secondary = max; link->subordinate = link->secondary;
ht_route_link(link, HT_ROUTE_SCAN); @@ -214,7 +212,7 @@ static u32 amdk8_scan_chain(device_t dev, u32 nodeid, struct bus *link, bool is_ ht_unitid_base[i] = 0x20; }
- if (min_bus == 0) + if (link->secondary == 0) max_devfn = (0x17<<3) | 7; else max_devfn = (0x1f<<3) | 7;