diff options
Diffstat (limited to 'src/devices')
| -rw-r--r-- | src/devices/hypertransport.c | 47 |
1 files changed, 29 insertions, 18 deletions
diff --git a/src/devices/hypertransport.c b/src/devices/hypertransport.c index 411e7542c0..de5d132263 100644 --- a/src/devices/hypertransport.c +++ b/src/devices/hypertransport.c @@ -8,6 +8,8 @@ #include <part/hard_reset.h> #include <part/fallback_boot.h> +#define OPT_HT_LINK 0 + static device_t ht_scan_get_devs(device_t *old_devices) { device_t first, last; @@ -24,7 +26,7 @@ static device_t ht_scan_get_devs(device_t *old_devices) } return first; } - +#if OPT_HT_LINK == 1 static unsigned ht_read_freq_cap(device_t dev, unsigned pos) { /* Handle bugs in valid hypertransport frequency reporting */ @@ -37,15 +39,15 @@ static unsigned ht_read_freq_cap(device_t dev, unsigned pos) if ((dev->vendor == PCI_VENDOR_ID_AMD) && (dev->device == PCI_DEVICE_ID_AMD_8131_PCIX)) { freq_cap &= ~(1 << HT_FREQ_800Mhz); - } + } else /* AMD 8151 Errata 23 */ if ((dev->vendor == PCI_VENDOR_ID_AMD) && (dev->device == PCI_DEVICE_ID_AMD_8151_SYSCTRL)) { freq_cap &= ~(1 << HT_FREQ_800Mhz); - } + } else /* AMD K8 Unsupported 1Ghz? */ if ((dev->vendor == PCI_VENDOR_ID_AMD) && (dev->device == 0x1100)) { - freq_cap &= ~(1 << HT_FREQ_1000Mhz); + freq_cap &= ~(1 << HT_FREQ_1000Mhz); } return freq_cap; } @@ -145,6 +147,7 @@ static int ht_setup_link(struct prev_link *prev, device_t dev, unsigned pos) return reset_needed; } +#endif static unsigned ht_lookup_slave_capability(struct device *dev) { @@ -217,11 +220,12 @@ static void ht_collapse_early_enumeration(struct bus *bus) unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) { unsigned next_unitid, last_unitid, previous_unitid; - uint8_t previous_pos; device_t old_devices, dev, func, *chain_last; unsigned min_unitid = 1; +#if OPT_HT_LINK == 1 int reset_needed; struct prev_link prev; +#endif /* Restore the hypertransport chain to it's unitialized state */ ht_collapse_early_enumeration(bus); @@ -232,20 +236,22 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) chain_last = &bus->children; /* Initialize the hypertransport enumeration state */ +#if OPT_HT_LINK == 1 reset_needed = 0; prev.dev = bus->dev; prev.pos = bus->cap; prev.config_off = PCI_HT_CAP_HOST_WIDTH; prev.freq_off = PCI_HT_CAP_HOST_FREQ; prev.freq_cap_off = PCI_HT_CAP_HOST_FREQ_CAP; +#endif /* If present assign unitid to a hypertransport chain */ last_unitid = min_unitid -1; next_unitid = min_unitid; - previous_pos = 0; do { uint32_t id, class; - uint8_t hdr_type, pos; + uint8_t hdr_type; + unsigned pos; uint16_t flags; unsigned count, static_count; @@ -293,17 +299,6 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) for(func = dev; func; func = func->sibling) { chain_last = &func->sibling; } - - /* Read the rest of the pci configuration information */ - hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE); - class = pci_read_config32(dev, PCI_CLASS_REVISION); - - /* Store the interesting information in the device structure */ - dev->vendor = id & 0xffff; - dev->device = (id >> 16) & 0xffff; - dev->hdr_type = hdr_type; - /* class code, the upper 3 bytes of PCI_CLASS_REVISION */ - dev->class = class >> 8; /* Find the hypertransport link capability */ pos = ht_lookup_slave_capability(dev); @@ -328,6 +323,17 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) - (dev->path.u.pci.devfn >> 3) + 1; } + /* Read the rest of the pci configuration information */ + hdr_type = pci_read_config8(dev, PCI_HEADER_TYPE); + class = pci_read_config32(dev, PCI_CLASS_REVISION); + + /* Store the interesting information in the device structure */ + dev->vendor = id & 0xffff; + dev->device = (id >> 16) & 0xffff; + dev->hdr_type = hdr_type; + /* class code, the upper 3 bytes of PCI_CLASS_REVISION */ + dev->class = class >> 8; + /* Compute the number of unitids consumed */ count = (flags >> 5) & 0x1f; /* get unit count */ printk_spew("%s count: %04x static_count: %04x\n", @@ -339,8 +345,10 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) /* Update the Unitid of the next device */ next_unitid += count; +#if OPT_HT_LINK == 1 /* Setup the hypetransport link */ reset_needed |= ht_setup_link(&prev, dev, pos); +#endif printk_debug("%s [%04x/%04x] %s next_unitid: %04x\n", dev_path(dev), @@ -348,6 +356,8 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) (dev->enabled? "enabled": "disabled"), next_unitid); } while((last_unitid != next_unitid) && (next_unitid <= 0x1f)); + +#if OPT_HT_LINK == 1 #if HAVE_HARD_RESET == 1 if(reset_needed) { printk_info("HyperT reset needed\n"); @@ -357,6 +367,7 @@ unsigned int hypertransport_scan_chain(struct bus *bus, unsigned int max) printk_debug("HyperT reset not needed\n"); } #endif +#endif if (next_unitid > 0x1f) { next_unitid = 0x1f; } |