diff options
Diffstat (limited to 'src/northbridge/amd')
| -rw-r--r-- | src/northbridge/amd/amdk8/incoherent_ht.c | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/src/northbridge/amd/amdk8/incoherent_ht.c b/src/northbridge/amd/amdk8/incoherent_ht.c index 2514084250..4dac99c341 100644 --- a/src/northbridge/amd/amdk8/incoherent_ht.c +++ b/src/northbridge/amd/amdk8/incoherent_ht.c @@ -24,13 +24,13 @@ #define K8_ALLOCATE_MMIO_RANGE 0 #endif +#if CONFIG_USE_PRINTK_IN_CAR == 0 +#error This file needs CONFIG_USE_PRINTK_IN_CAR +#endif + static inline void print_linkn_in (const char *strval, uint8_t byteval) { -#if CONFIG_USE_PRINTK_IN_CAR printk_debug("%s%02x\r\n", strval, byteval); -#else - print_debug(strval); print_debug_hex8(byteval); print_debug("\r\n"); -#endif } static uint8_t ht_lookup_capability(device_t dev, uint16_t val) @@ -131,6 +131,7 @@ static uint16_t ht_read_freq_cap(device_t dev, uint8_t pos) uint32_t id; freq_cap = pci_read_config16(dev, pos); + printk_spew("pos=0x%x, unfiltered freq_cap=0x%x\r\n", pos, freq_cap); freq_cap &= ~(1 << HT_FREQ_VENDOR); /* Ignore Vendor HT frequencies */ id = pci_read_config32(dev, 0); @@ -160,6 +161,9 @@ static uint16_t ht_read_freq_cap(device_t dev, uint8_t pos) #endif } + printk_spew("pos=0x%x, filtered freq_cap=0x%x\r\n", pos, freq_cap); + //printk_spew("capping to 800/600/400/200 MHz\r\n"); + //freq_cap &= 0x3f; return freq_cap; } @@ -220,12 +224,14 @@ static int ht_optimize_link( int needs_reset; /* Set link width and frequency */ + printk_spew("entering ht_optimize_link\r\n"); /* Initially assume everything is already optimized and I don't need a reset */ needs_reset = 0; /* Get the frequency capabilities */ freq_cap1 = ht_read_freq_cap(dev1, pos1 + LINK_FREQ_CAP(offs1)); freq_cap2 = ht_read_freq_cap(dev2, pos2 + LINK_FREQ_CAP(offs2)); + printk_spew("freq_cap1=0x%x, freq_cap2=0x%x\r\n", freq_cap1, freq_cap2); /* Calculate the highest possible frequency */ freq = log2(freq_cap1 & freq_cap2); @@ -234,48 +240,58 @@ static int ht_optimize_link( old_freq = pci_read_config8(dev1, pos1 + LINK_FREQ(offs1)); old_freq &= 0x0f; needs_reset |= old_freq != freq; + printk_spew("dev1 old_freq=0x%x, freq=0x%x, needs_reset=0x%0x\r\n", old_freq, freq, needs_reset); old_freq = pci_read_config8(dev2, pos2 + LINK_FREQ(offs2)); old_freq &= 0x0f; needs_reset |= old_freq != freq; + printk_spew("dev2 old_freq=0x%x, freq=0x%x, needs_reset=0x%0x\r\n", old_freq, freq, needs_reset); - /* Set the Calulcated link frequency */ + /* Set the Calculated link frequency */ pci_write_config8(dev1, pos1 + LINK_FREQ(offs1), freq); pci_write_config8(dev2, pos2 + LINK_FREQ(offs2), freq); /* Get the width capabilities */ width_cap1 = ht_read_width_cap(dev1, pos1 + LINK_WIDTH(offs1)); width_cap2 = ht_read_width_cap(dev2, pos2 + LINK_WIDTH(offs2)); + printk_spew("width_cap1=0x%x, width_cap2=0x%x\r\n", width_cap1, width_cap2); /* Calculate dev1's input width */ ln_width1 = link_width_to_pow2[width_cap1 & 7]; ln_width2 = link_width_to_pow2[(width_cap2 >> 4) & 7]; + printk_spew("dev1 input ln_width1=0x%x, ln_width2=0x%x\r\n", ln_width1, ln_width2); if (ln_width1 > ln_width2) { ln_width1 = ln_width2; } width = pow2_to_link_width[ln_width1]; + printk_spew("dev1 input width=0x%x\r\n", width); /* Calculate dev1's output width */ ln_width1 = link_width_to_pow2[(width_cap1 >> 4) & 7]; ln_width2 = link_width_to_pow2[width_cap2 & 7]; + printk_spew("dev1 output ln_width1=0x%x, ln_width2=0x%x\r\n", ln_width1, ln_width2); if (ln_width1 > ln_width2) { ln_width1 = ln_width2; } width |= pow2_to_link_width[ln_width1] << 4; + printk_spew("dev1 input|output width=0x%x\r\n", width); /* See if I am changing dev1's width */ old_width = pci_read_config8(dev1, pos1 + LINK_WIDTH(offs1) + 1); old_width &= 0x77; needs_reset |= old_width != width; + printk_spew("old dev1 input|output width=0x%x\r\n", width); /* Set dev1's widths */ pci_write_config8(dev1, pos1 + LINK_WIDTH(offs1) + 1, width); /* Calculate dev2's width */ width = ((width & 0x70) >> 4) | ((width & 0x7) << 4); + printk_spew("dev2 input|output width=0x%x\r\n", width); /* See if I am changing dev2's width */ old_width = pci_read_config8(dev2, pos2 + LINK_WIDTH(offs2) + 1); old_width &= 0x77; needs_reset |= old_width != width; + printk_spew("old dev2 input|output width=0x%x\r\n", width); /* Set dev2's widths */ pci_write_config8(dev2, pos2 + LINK_WIDTH(offs2) + 1, width); @@ -966,12 +982,16 @@ static int optimize_link_incoherent_ht(struct sys_info *sysinfo) unsigned link_pair_num = sysinfo->link_pair_num; + printk_spew("entering optimize_link_incoherent_ht\r\n"); + printk_spew("sysinfo->link_pair_num=0x%x\r\n", link_pair_num); for(i=0; i< link_pair_num; i++) { struct link_pair_st *link_pair= &sysinfo->link_pair[i]; reset_needed |= ht_optimize_link(link_pair->udev, link_pair->upos, link_pair->uoffs, link_pair->dev, link_pair->pos, link_pair->offs); + printk_spew("after ht_optimize_link for link pair %d, reset_needed=0x%x\r\n", i, reset_needed); } reset_needed |= optimize_link_read_pointers_chain(sysinfo->ht_c_num); + printk_spew("after optimize_link_read_pointers_chain, reset_needed=0x%x\r\n", reset_needed); return reset_needed; |