Sven Schnelle (svens@stackframe.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/491
-gerrit
commit 90c2980b2e7902a4df6b0898fe64b3e3aa280735 Author: Sven Schnelle svens@stackframe.org Date: Wed Feb 1 22:06:45 2012 +0100
Add Intel i5000 Memory Controller Hub
Change-Id: Ic169f3f61babfcfa2ddcb84fc0267ebcf8c5f3bb Signed-off-by: Sven Schnelle svens@stackframe.org --- src/northbridge/intel/Kconfig | 1 + src/northbridge/intel/Makefile.inc | 1 + src/northbridge/intel/i5000/Kconfig | 26 + src/northbridge/intel/i5000/Makefile.inc | 21 + src/northbridge/intel/i5000/chip.h | 23 + src/northbridge/intel/i5000/northbridge.c | 188 +++ src/northbridge/intel/i5000/raminit.c | 1771 +++++++++++++++++++++++++++++ src/northbridge/intel/i5000/raminit.h | 337 ++++++ src/northbridge/intel/i5000/udelay.c | 84 ++ 9 files changed, 2452 insertions(+), 0 deletions(-)
diff --git a/src/northbridge/intel/Kconfig b/src/northbridge/intel/Kconfig index 1809d11..31afe6a 100644 --- a/src/northbridge/intel/Kconfig +++ b/src/northbridge/intel/Kconfig @@ -10,3 +10,4 @@ source src/northbridge/intel/i82830/Kconfig source src/northbridge/intel/i855/Kconfig source src/northbridge/intel/i945/Kconfig source src/northbridge/intel/sch/Kconfig +source src/northbridge/intel/i5000/Kconfig diff --git a/src/northbridge/intel/Makefile.inc b/src/northbridge/intel/Makefile.inc index 0d116d0..c599dab 100644 --- a/src/northbridge/intel/Makefile.inc +++ b/src/northbridge/intel/Makefile.inc @@ -11,3 +11,4 @@ subdirs-$(CONFIG_NORTHBRIDGE_INTEL_I855) += i855 subdirs-$(CONFIG_NORTHBRIDGE_INTEL_I945GC) += i945 subdirs-$(CONFIG_NORTHBRIDGE_INTEL_I945GM) += i945 subdirs-$(CONFIG_NORTHBRIDGE_INTEL_SCH) += sch +subdirs-$(CONFIG_NORTHBRIDGE_INTEL_I5000) += i5000 diff --git a/src/northbridge/intel/i5000/Kconfig b/src/northbridge/intel/i5000/Kconfig new file mode 100644 index 0000000..0595a57 --- /dev/null +++ b/src/northbridge/intel/i5000/Kconfig @@ -0,0 +1,26 @@ +## +## This file is part of the coreboot project. +## +## Copyright (C) 2011 Sven Schnelle svens@stackframe.org +## +## This program is free software; you can redistribute it and/or modify +## it under the terms of the GNU General Public License as published by +## the Free Software Foundation; version 2 of the License. +## +## This program is distributed in the hope that it will be useful, +## but WITHOUT ANY WARRANTY; without even the implied warranty of +## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +## GNU General Public License for more details. +## +## You should have received a copy of the GNU General Public License +## along with this program; if not, write to the Free Software +## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +## + +config NORTHBRIDGE_INTEL_I5000 + bool + select HAVE_DEBUG_RAM_SETUP + +config NORTHBRIDGE_INTEL_I5000_RAM_CHECK + bool + prompt "Run ramcheck after RAM initialization" diff --git a/src/northbridge/intel/i5000/Makefile.inc b/src/northbridge/intel/i5000/Makefile.inc new file mode 100644 index 0000000..a5623c0 --- /dev/null +++ b/src/northbridge/intel/i5000/Makefile.inc @@ -0,0 +1,21 @@ +# +# This file is part of the coreboot project. +# +# Copyright (C) 2007-2009 coresystems GmbH +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +# + +driver-y += northbridge.c +romstage-y += raminit.c udelay.c diff --git a/src/northbridge/intel/i5000/chip.h b/src/northbridge/intel/i5000/chip.h new file mode 100644 index 0000000..a23be90 --- /dev/null +++ b/src/northbridge/intel/i5000/chip.h @@ -0,0 +1,23 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Sven Schnelle svens@stackframe.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +struct northbridge_intel_i5000_config { +}; + +extern struct chip_operations northbridge_intel_i5000_ops; diff --git a/src/northbridge/intel/i5000/northbridge.c b/src/northbridge/intel/i5000/northbridge.c new file mode 100644 index 0000000..3db755c --- /dev/null +++ b/src/northbridge/intel/i5000/northbridge.c @@ -0,0 +1,188 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Sven Schnelle svens@stackframe.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <arch/io.h> +#include <stdint.h> +#include <device/device.h> +#include <device/pci.h> +#include <device/pci_ids.h> +#include <stdlib.h> +#include <string.h> +#include <bitops.h> +#include <cpu/cpu.h> +#include <boot/tables.h> +#include <arch/acpi.h> +#include <cbmem.h> +#include "chip.h" + +static void intel_set_subsystem(device_t dev, unsigned vendor, unsigned device) +{ + if (!vendor || !device) { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + pci_read_config32(dev, PCI_VENDOR_ID)); + } else { + pci_write_config32(dev, PCI_SUBSYSTEM_VENDOR_ID, + ((device & 0xffff) << 16) | (vendor & 0xffff)); + } +} + +static struct pci_operations intel_pci_ops = { + .set_subsystem = intel_set_subsystem, +}; + +static struct device_operations mc_ops = { + .read_resources = pci_dev_read_resources, + .set_resources = pci_dev_set_resources, + .enable_resources = pci_dev_enable_resources, + .scan_bus = 0, + .ops_pci = &intel_pci_ops, +}; + +static const struct pci_driver mc_driver __pci_driver = { + .ops = &mc_ops, + .vendor = PCI_VENDOR_ID_INTEL, + .device = 0x25d8, +}; + +static void cpu_bus_init(device_t dev) +{ + initialize_cpus(dev->link_list); +} + +static void cpu_bus_noop(device_t dev) +{ +} +static struct device_operations cpu_bus_ops = { + .read_resources = cpu_bus_noop, + .set_resources = cpu_bus_noop, + .enable_resources = cpu_bus_noop, + .init = cpu_bus_init, + .scan_bus = 0, +}; + +#if CONFIG_WRITE_HIGH_TABLES +#include <cbmem.h> +#endif + +static void pci_domain_set_resources(device_t dev) +{ + struct resource *resource; + uint32_t hecbase, amsize, tolm; + uint64_t ambase, memsize; + int idx = 0; + device_t dev16_0 = dev_find_slot(0, PCI_DEVFN(16, 0)); + device_t dev16_1 = dev_find_slot(0, PCI_DEVFN(16, 1)); + + tolm = pci_read_config16(dev_find_slot(0, PCI_DEVFN(16, 1)), 0x6c) << 16; + hecbase = pci_read_config16(dev16_0, 0x64) >> 12; + hecbase &= 0xffff; + + ambase = ((u64)pci_read_config32(dev16_0, 0x48) | + (u64)pci_read_config32(dev16_0, 0x4c) << 32); + + amsize = pci_read_config32(dev16_0, 0x50); + ambase &= 0x000000ffffff0000; + + printk(BIOS_DEBUG, "TOLM: 0x%08x AMBASE: 0x%016llx\n", tolm, ambase); + + /* Report the memory regions */ + ram_resource(dev, idx++, 0, 640); + ram_resource(dev, idx++, 768, ((tolm >> 10) - 768)); + + memsize = MAX(pci_read_config16(dev16_1, 0x80) & ~3, + pci_read_config16(dev16_1, 0x84) & ~3); + memsize = MAX(memsize, pci_read_config16(dev16_1, 0x88) & ~3); + + memsize <<= 24; + printk(BIOS_INFO, "MEMSIZE: %08llx\n", memsize); + if (memsize > 0xe0000000) { + memsize -= 0xe0000000; + printk(BIOS_INFO, "high memory: %lldMB\n", memsize / 1048576); + ram_resource(dev, idx++, 4096 * 1024, memsize / 1024); + } + + if (hecbase) { + printk(BIOS_DEBUG, "Adding PCIe config bar at 0x%016llx\n", (u64)hecbase << 28); + resource = new_resource(dev, idx++); + resource->base = (resource_t)(uint64_t)hecbase << 28; + resource->size = (resource_t)256 * 1024 * 1024; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + } + + resource = new_resource(dev, idx++); + resource->base = (resource_t)(uint64_t)0xffe00000; + resource->size = (resource_t)0x200000; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + + if (ambase && amsize) { + resource = new_resource(dev, idx++); + resource->base = (resource_t)ambase; + resource->size = (resource_t)amsize; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + } + + /* add resource for 0xfe6xxxxx range. This range is used by i5000 for + various fixed address registers (BOFL, SPAD, SPADS */ + resource = new_resource(dev, idx++); + resource->base = (resource_t)0xfe600000; + resource->size = (resource_t)0x00100000; + resource->flags = IORESOURCE_MEM | IORESOURCE_RESERVE | + IORESOURCE_FIXED | IORESOURCE_STORED | IORESOURCE_ASSIGNED; + + assign_resources(dev->link_list); + +#if CONFIG_WRITE_HIGH_TABLES + /* Leave some space for ACPI, PIRQ and MP tables */ + high_tables_base = tolm - HIGH_MEMORY_SIZE; + high_tables_size = HIGH_MEMORY_SIZE; + printk(BIOS_DEBUG, "high_tables_base: %08llx, size %lld\n", high_tables_base, high_tables_size); +#endif +} + +static struct device_operations pci_domain_ops = { + .read_resources = pci_domain_read_resources, + .set_resources = pci_domain_set_resources, + .enable_resources = NULL, + .init = NULL, + .scan_bus = pci_domain_scan_bus, +#if CONFIG_MMCONF_SUPPORT_DEFAULT + .ops_pci_bus = &pci_ops_mmconf, +#else + .ops_pci_bus = &pci_cf8_conf1, +#endif +}; + +static void enable_dev(device_t dev) +{ + /* Set the operations if it is a special bus type */ + if (dev->path.type == DEVICE_PATH_PCI_DOMAIN) { + dev->ops = &pci_domain_ops; + } else if (dev->path.type == DEVICE_PATH_APIC_CLUSTER) { + dev->ops = &cpu_bus_ops; + } +} + +struct chip_operations northbridge_intel_i5000_ops = { + CHIP_NAME("Intel i5000 Northbridge") + .enable_dev = enable_dev, +}; diff --git a/src/northbridge/intel/i5000/raminit.c b/src/northbridge/intel/i5000/raminit.c new file mode 100644 index 0000000..2a04c7e --- /dev/null +++ b/src/northbridge/intel/i5000/raminit.c @@ -0,0 +1,1771 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Sven Schnelle svens@stackframe.org + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of + * the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#include "raminit.h" +#include <arch/io.h> +#include <arch/romcc_io.h> +#include <device/pci_def.h> +#include <device/pnp_def.h> +#include <cpu/x86/lapic.h> +#include <console/console.h> +#include <spd.h> +#include <types.h> +#include <southbridge/intel/i63xx/early_smbus.c> +#include <string.h> +#include <cbmem.h> +#include <stdlib.h> +#include <lib.h> +#include <delay.h> + +static int i5000_for_each_channel(struct i5000_fbd_branch *branch, + int (*cb)(struct i5000_fbd_channel *)) +{ + struct i5000_fbd_channel *c; + int ret; + + for(c = branch->channel; c < branch->channel + I5000_MAX_CHANNEL; c++) + if (c->used && (ret = cb(c))) + return ret; + return 0; +} + +static int i5000_for_each_branch(struct i5000_fbd_setup *setup, + int (*cb)(struct i5000_fbd_branch *)) +{ + struct i5000_fbd_branch *b; + int ret; + + for(b = setup->branch; b < setup->branch + I5000_MAX_BRANCH; b++) + if (b->used && (ret = cb(b))) + return ret; + return 0; +} + +static int i5000_for_each_dimm(struct i5000_fbd_setup *setup, + int (*cb)(struct i5000_fbdimm *)) +{ + struct i5000_fbdimm *d; + int ret, i; + + for(i = 0; i < I5000_MAX_DIMMS; i++) { + d = setup->dimms[i]; + if ((ret = cb(d))) { + return ret; + } + } + return 0; +} + +static int i5000_for_each_dimm_present(struct i5000_fbd_setup *setup, + int (*cb)(struct i5000_fbdimm *)) +{ + struct i5000_fbdimm *d; + int ret, i; + + for(i = 0; i < I5000_MAX_DIMMS; i++) { + d = setup->dimms[i]; + if (d->present && (ret = cb(d))) + return ret; + } + return 0; +} + +static int spd_read_byte(struct i5000_fbdimm *d, u8 addr, int count, u8 *out) +{ + u16 status; + device_t dev = d->branch->branchdev; + + int cmdreg = d->channel->num ? I5000_SPDCMD1 : I5000_SPDCMD0; + int stsreg = d->channel->num ? I5000_SPD1 : I5000_SPD0; + + while(count-- > 0) { + pci_write_config32(dev, cmdreg, 0xa8000000 | \ + (d->num & 0x03) << 24 | addr++ << 16); + + int timeout = 1000; + while((status = pci_read_config16(dev, stsreg)) & I5000_SPD_BUSY && timeout--) + udelay(10); + + if (status & I5000_SPD_SBE || !timeout) + return -1; + + if (status & I5000_SPD_RDO) { + *out = status & 0xff; + out++; + } + } + return 0; +} + +static void i5000_clear_fbd_errors(void) +{ + device_t dev16_1, dev16_2; + + dev16_1 = PCI_ADDR(0, 16, 1, 0); + dev16_2 = PCI_ADDR(0, 16, 2, 0); + + pci_mmio_write_config32(dev16_1, I5000_EMASK_FBD, + pci_mmio_read_config32(dev16_1, I5000_EMASK_FBD)); + + pci_mmio_write_config32(dev16_1, I5000_NERR_FAT_FBD, + pci_mmio_read_config32(dev16_1, I5000_NERR_FAT_FBD)); + + pci_mmio_write_config32(dev16_1, I5000_FERR_FAT_FBD, + pci_mmio_read_config32(dev16_1, I5000_FERR_FAT_FBD)); + + pci_mmio_write_config32(dev16_1, I5000_NERR_NF_FBD, + pci_mmio_read_config32(dev16_1, I5000_NERR_NF_FBD)); + + pci_mmio_write_config32(dev16_1, I5000_FERR_NF_FBD, + pci_mmio_read_config32(dev16_1, I5000_FERR_NF_FBD)); + + pci_mmio_write_config32(dev16_2, I5000_FERR_GLOBAL, + pci_mmio_read_config32(dev16_2, I5000_FERR_GLOBAL)); + + pci_mmio_write_config32(dev16_2, I5000_NERR_GLOBAL, + pci_mmio_read_config32(dev16_2, I5000_NERR_GLOBAL)); +} + +static int i5000_branch_reset(struct i5000_fbd_branch *b) +{ + device_t dev = b->branchdev; + + pci_write_config8(dev, I5000_FBDRST, 0x00); + + udelay(5000); + + pci_write_config8(dev, I5000_FBDRST, 0x05); + udelay(1); + pci_write_config8(dev, I5000_FBDRST, 0x04); + udelay(2); + pci_write_config8(dev, I5000_FBDRST, 0x05); + pci_write_config8(dev, I5000_FBDRST, 0x07); + return 0; +} + +static int delay_ns_to_clocks(struct i5000_fbdimm *d, int del) +{ + int div; + + switch (d->setup->ddr_speed) { + case DDR_533MHZ: + div = 375; + break; + + default: + printk(BIOS_ERR, "Invalid clock: %d, using 667MHz\n", + d->setup->ddr_speed); + + case DDR_667MHZ: + div = 300; + break; + } + + return (del * 100) / div; +} + +static int mtb2clks(struct i5000_fbdimm *d, int del) +{ + int val, div; + + switch (d->setup->ddr_speed) { + case DDR_533MHZ: + div = 375; + break; + default: + printk(BIOS_ERR, "Invalid clock: %d, using 667MHz\n", + d->setup->ddr_speed); + + case DDR_667MHZ: + div = 300; + break; + } + + val = (del * 1000 * d->mtb_dividend) / (d->mtb_divisor * div); + if ((val % 10) > 0) + val += 10; + return val / 10; +} + +static int i5000_read_spd_data(struct i5000_fbdimm *d) +{ + struct i5000_fbd_setup *s; + u8 addr, val, org, ftb, cas, t_ras_rc_h, t_rtp, t_wtr; + u8 bb, bl, t_wr, t_rp, t_rcd, t_rc, t_ras, t_aa_min; + u8 cmd2data_addr; + int t_ck_min, dimmsize; + + s = d->setup; + if (spd_read_byte(d, SPD_MEMORY_TYPE, 1, &val)) { + printk(BIOS_DEBUG, "DIMM %d/%d/%d not present\n", + d->branch->num, d->channel->num, d->num); + return 0; // No FBDIMM present + } + + if (val != 0x09) + return 0; // SDRAM type not FBDIMM + + if (spd_read_byte(d, 0x65, 14, d->amb_personality_bytes)) + return 0; + + switch(d->setup->ddr_speed) { + case DDR_533MHZ: + cmd2data_addr = FBDIMM_SPD_CMD2DATA_533; + break; + + case DDR_667MHZ: + cmd2data_addr = FBDIMM_SPD_CMD2DATA_667; + break; + + default: + printk(BIOS_ERR, "Unsupported FBDIMM clock\n"); + return -1; + } + + if (spd_read_byte(d, FBDIMM_SPD_SDRAM_ADDRESSING, 1, &addr) || + spd_read_byte(d, FBDIMM_SPD_MODULE_ORGANIZATION, 1, &org) || + spd_read_byte(d, FBDIMM_SPD_FTB, 1, &ftb) || + spd_read_byte(d, FBDIMM_SPD_MTB_DIVIDEND, 1, &d->mtb_dividend) || + spd_read_byte(d, FBDIMM_SPD_MTB_DIVISOR, 1, &d->mtb_divisor) || + spd_read_byte(d, FBDIMM_SPD_MIN_TCK, 1, &d->t_ck_min) || + spd_read_byte(d, FBDIMM_SPD_T_WR, 1, &t_wr) || + spd_read_byte(d, FBDIMM_SPD_T_RCD, 1, &t_rcd) || + spd_read_byte(d, FBDIMM_SPD_T_RRD, 1, &d->t_rrd) || + spd_read_byte(d, FBDIMM_SPD_T_RP, 1, &t_rp) || + spd_read_byte(d, FBDIMM_SPD_T_RAS_RC_MSB, 1, &t_ras_rc_h) || + spd_read_byte(d, FBDIMM_SPD_T_RAS, 1, (u8 *)&t_ras) || + spd_read_byte(d, FBDIMM_SPD_T_RC, 1, (u8 *)&t_rc) || + spd_read_byte(d, FBDIMM_SPD_T_RFC, 2, (u8 *)&d->t_rfc) || + spd_read_byte(d, FBDIMM_SPD_T_WTR, 1, &t_wtr) || + spd_read_byte(d, FBDIMM_SPD_T_RTP, 1, &t_rtp) || + spd_read_byte(d, FBDIMM_SPD_T_BB, 1, &bb) || + spd_read_byte(d, FBDIMM_SPD_BURST_LENGTHS_SUPPORTED, 1, &bl) || + spd_read_byte(d, FBDIMM_SPD_ODT, 1, &d->odt) || + spd_read_byte(d, FBDIMM_SPD_T_REFI, 1, &d->t_refi) || + spd_read_byte(d, FBDIMM_SPD_CAS_LATENCIES, 1, &cas) || + spd_read_byte(d, FBDIMM_SPD_CMD2DATA_533, 1, &d->cmd2datanxt[DDR_533MHZ]) || + spd_read_byte(d, FBDIMM_SPD_CMD2DATA_667, 1, &d->cmd2datanxt[DDR_667MHZ]) || + spd_read_byte(d, FBDIMM_SPD_CAS_MIN_LATENCY, 1, &t_aa_min)) { + printk(BIOS_ERR, "failed to read data from SPD\n"); + return 0; + } + + + t_ck_min = (d->t_ck_min * 100) / d->mtb_divisor; + if (t_ck_min <= 300) + d->speed = DDR_667MHZ; + else if (t_ck_min <= 375) + d->speed = DDR_533MHZ; + else { + printk(BIOS_ERR, "Unsupported t_ck_min: %d\n", t_ck_min); + return -1; + } + + d->sdram_width = org & 0x07; + if (d->sdram_width > 1) { + printk(BIOS_ERR, "SDRAM width %d not supported\n", d->sdram_width); + return 0; + } + + s->ddr_speed = MIN(s->ddr_speed, d->speed); + + d->banks = 4 << (addr & 0x03); + d->columns = 9 + ((addr >> 2) & 0x03); + d->rows = 12 + ((addr >> 5) & 0x03); + d->ranks = (org >> 3) & 0x03; + d->min_cas_latency = cas & 0x0f; + + d->setup->bl &= bl; + + if (!d->setup->bl) { + printk(BIOS_ERR, "no compatible burst length found\n"); + return -1; + } + + s->t_rc = MAX(s->t_rc, mtb2clks(d, + t_rc | ((t_ras_rc_h & 0xf0) << 4))); + s->t_rrd = MAX(s->t_rrd, mtb2clks(d, d->t_rrd)); + s->t_rfc = MAX(s->t_rfc, mtb2clks(d, d->t_rfc)); + s->t_rcd = MAX(s->t_rcd, mtb2clks(d, t_rcd)); + s->t_cl = MAX(s->t_cl, mtb2clks(d, t_aa_min)); + s->t_wr = MAX(s->t_wr, mtb2clks(d, t_wr)); + s->t_rp = MAX(s->t_rp, mtb2clks(d, t_rp)); + s->t_rtp = MAX(s->t_rtp, mtb2clks(d, t_rtp)); + s->t_wtr = MAX(s->t_wtr, mtb2clks(d, t_wtr)); + s->t_ras = MAX(s->t_ras, mtb2clks(d, + t_ras | ((t_ras_rc_h & 0x0f) << 8))); + s->t_r2r = MAX(s->t_r2r, bb & 3); + s->t_r2w = MAX(s->t_r2w, (bb >> 4) & 3); + s->t_w2r = MAX(s->t_w2r, (bb >> 2) & 3); + + d->ranksize = (1 << (d->banks + d->columns + d->rows + 1)) >> 20; + dimmsize = d->ranksize * d->ranks; + d->branch->totalmem += dimmsize; + s->totalmem += dimmsize; + + d->channel->columns = d->columns; + d->channel->rows = d->rows; + d->channel->ranks = d->ranks; + d->channel->banks = d->banks; + d->channel->width = d->sdram_width; + + printk(BIOS_INFO, "DIMM %d/%d/%d %dMB: %d banks, " + "%d columns, %d rows, %d ranks\n", + d->branch->num, d->channel->num, d->num, dimmsize, + d->banks, d->columns, d->rows, d->ranks); + + d->present = 1; + d->branch->used |= 1; + d->channel->used |= 1; + d->channel->highest_amb = d->num; + return 0; +} + +static int i5000_amb_smbus_write(struct i5000_fbdimm *d, int byte1, int byte2) +{ + u16 status; + device_t dev = PCI_DEV(0, d->branch->num ? 22 : 21, 0); + int cmdreg = d->channel->num ? I5000_SPDCMD1 : I5000_SPDCMD0; + int stsreg = d->channel->num ? I5000_SPD1 : I5000_SPD0; + int timeout = 1000; + + pci_write_config32(dev, cmdreg, 0xb8000000 | ((d->num & 0x03) << 24) | + (byte1 << 16) | (byte2 << 8) | 1); + + while(((status = pci_read_config16(dev, stsreg)) & I5000_SPD_BUSY) && timeout--) + udelay(10); + + if (status & I5000_SPD_WOD && timeout) + return 0; + + printk(BIOS_ERR, "SMBus write failed: %d/%d/%d, byte1 %02x, byte2 %02x status %04x\n", + d->branch->num, d->channel->num, d->num, byte1, byte2, status); + for(;;); + return -1; +} + +static int i5000_amb_smbus_read(struct i5000_fbdimm *d, int byte1, u8 *out) +{ + u16 status; + device_t dev = PCI_DEV(0, d->branch->num ? 22 : 21, 0); + int cmdreg = d->channel->num ? I5000_SPDCMD1 : I5000_SPDCMD0; + int stsreg = d->channel->num ? I5000_SPD1 : I5000_SPD0; + int timeout = 1000; + + pci_write_config32(dev, cmdreg, 0xb8000000 | ((d->num & 0x03) << 24) | + (byte1 << 16)); + + while(((status = pci_read_config16(dev, stsreg)) & I5000_SPD_BUSY) && timeout--) + udelay(10); + + if ((status & I5000_SPD_RDO) && timeout) + *out = status & 0xff; + + if (status & I5000_SPD_SBE || !timeout) { + printk(BIOS_ERR, "SMBus write failed: %d/%d/%d, byte1 %02x status %04x\n", + d->branch->num, d->channel->num, d->num, byte1, status); + for(;;); + return -1; + } + return 0; + +} + +static int i5000_amb_smbus_write_config8(struct i5000_fbdimm *d, + int fn, int reg, u8 val) +{ + if (i5000_amb_smbus_write(d, 0x84, 00) || + i5000_amb_smbus_write(d, 0x04, fn) || + i5000_amb_smbus_write(d, 0x04, (reg >> 8) & 0xff) || + i5000_amb_smbus_write(d, 0x04, reg & 0xff) || + i5000_amb_smbus_write(d, 0x44, val)) { + printk(BIOS_ERR, "AMB SMBUS write failed\n"); + return 1; + } + return 0; +} + +static int i5000_amb_smbus_write_config16(struct i5000_fbdimm *d, + int fn, int reg, u16 val) +{ + if (i5000_amb_smbus_write(d, 0x88, 00) || + i5000_amb_smbus_write(d, 0x08, fn) || + i5000_amb_smbus_write(d, 0x08, (reg >> 8) & 0xff) || + i5000_amb_smbus_write(d, 0x08, reg & 0xff) || + i5000_amb_smbus_write(d, 0x08, (val >> 8) & 0xff) || + i5000_amb_smbus_write(d, 0x48, val & 0xff)) { + printk(BIOS_ERR, "AMB SMBUS write failed\n"); + return 1; + } + return 0; +} + +static int i5000_amb_smbus_write_config32(struct i5000_fbdimm *d, + int fn, int reg, u32 val) +{ + if (i5000_amb_smbus_write(d, 0x8c, 00) || + i5000_amb_smbus_write(d, 0x0c, fn) || + i5000_amb_smbus_write(d, 0x0c, (reg >> 8) & 0xff) || + i5000_amb_smbus_write(d, 0x0c, reg & 0xff) || + i5000_amb_smbus_write(d, 0x0c, (val >> 24) & 0xff) || + i5000_amb_smbus_write(d, 0x0c, (val >> 16) & 0xff) || + i5000_amb_smbus_write(d, 0x0c, (val >> 8) & 0xff) || + i5000_amb_smbus_write(d, 0x4c, val & 0xff)) { + printk(BIOS_ERR, "AMB SMBUS write failed\n"); + return 1; + } + return 0; +} + +static int i5000_amb_smbus_read_config32(struct i5000_fbdimm *d, + int fn, int reg, u32 *val) +{ + u8 byte3, byte2, byte1, byte0; + + if (i5000_amb_smbus_write(d, 0x80, 00) || + i5000_amb_smbus_write(d, 0x00, fn) || + i5000_amb_smbus_write(d, 0x00, (reg >> 8) & 0xff) || + i5000_amb_smbus_write(d, 0x40, reg & 0xff) || + i5000_amb_smbus_read(d, 0x80, &byte3) || + i5000_amb_smbus_read(d, 0x00, &byte3) || + i5000_amb_smbus_read(d, 0x00, &byte2) || + i5000_amb_smbus_read(d, 0x00, &byte1) || + i5000_amb_smbus_read(d, 0x40, &byte0)) { + printk(BIOS_ERR, "AMB SMBUS read failed\n"); + return 1; + } + *val = (byte3 << 24) | (byte2 << 16) | (byte1 << 8) | byte0; + return 0; +} + +static void i5000_amb_write_config8(struct i5000_fbdimm *d, + int fn, int reg, u32 val) +{ + write8(DEFAULT_AMBASE + AMB_ADDR(d->ambase, fn, reg), val); +} + +static void i5000_amb_write_config16(struct i5000_fbdimm *d, + int fn, int reg, u32 val) +{ + write16(DEFAULT_AMBASE + AMB_ADDR(d->ambase, fn, reg), val); +} + +static void i5000_amb_write_config32(struct i5000_fbdimm *d, + int fn, int reg, u32 val) +{ + write32(DEFAULT_AMBASE + AMB_ADDR(d->ambase, fn, reg), val); +} + +static u32 i5000_amb_read_config32(struct i5000_fbdimm *d, + int fn, int reg) +{ + return read32(DEFAULT_AMBASE + AMB_ADDR(d->ambase, fn, reg)); +} + +static int ddr_command(struct i5000_fbdimm *d, int rank, u32 addr, u32 command) +{ + u32 drc, status; + + printk(BIOS_SPEW, "DIMM %d/%d/%d: rank %d: sending command %x (addr %08x)...", + d->branch->num, d->channel->num, d->num, rank, command, addr); + + drc = i5000_amb_read_config32(d, 3, AMB_DRC); + drc &= ~((3 << 9) | (1 << 12)); + drc |= (rank << 9); + + command &= 0x0f; + command |= AMB_DCALCSR_START | (rank << 21); + + printk(BIOS_DEBUG, "%s: AMB_DCALADDR: %08x AMB_DCALCSR: %08x\n", __func__, addr, command); + i5000_amb_write_config32(d, 3, AMB_DRC, drc); + i5000_amb_write_config32(d, 4, AMB_DCALADDR, addr); + i5000_amb_write_config32(d, 4, AMB_DCALCSR, command); + + udelay(1000); + while((status = (i5000_amb_read_config32(d, 4, AMB_DCALCSR))) + & (1 << 31)); + + if (status & (1 << 30)) { + printk(BIOS_SPEW, "failed (status 0x%08x)\n", status); + return -1; + } + + printk(BIOS_SPEW, "done\n"); + return 0; +} + +static int i5000_ddr_calibration(struct i5000_fbdimm *d) +{ + u32 status; + + i5000_amb_write_config32(d, 3, AMB_MBADDR, 0); + i5000_amb_write_config32(d, 3, AMB_MBCSR, 0x80100050); + while((status = i5000_amb_read_config32(d, 3, AMB_MBCSR)) & (1 << 31)); + + i5000_amb_write_config32(d, 3, AMB_MBCSR, 0x80200050); + while((status = i5000_amb_read_config32(d, 3, AMB_MBCSR)) & (1 << 31)); + + if (ddr_command(d, d->ranks == 2 ? 3 : 1, 0, AMB_DCALCSR_OPCODE_RECV_ENABLE_CAL) || + ddr_command(d, d->ranks == 2 ? 3 : 1, 0, AMB_DCALCSR_OPCODE_DQS_DELAY_CAL)) + return -1; + return 0; +} + +static int i5000_ddr_init(struct i5000_fbdimm *d) +{ + + int rank; + u32 val; + u8 odt; + + for(rank = 0; rank < d->ranks; rank++) { + printk(BIOS_DEBUG, "%s: %d/%d/%d rank %d\n", __func__, + d->branch->num, d->channel->num, d->num, rank); + + if (ddr_command(d, 1 << rank, + 0, AMB_DCALCSR_OPCODE_NOP)) + return -1; + + if (ddr_command(d, 1 << rank, + 0x4000000, AMB_DCALCSR_OPCODE_PRECHARGE)) + return -1; + + /* EMRS(2) */ + if (ddr_command(d, 1 << rank, + 2, AMB_DCALCSR_OPCODE_MRS_EMRS)) + return -1; + + /* EMRS(3) */ + if (ddr_command(d, 1 << rank, + 3, AMB_DCALCSR_OPCODE_MRS_EMRS)) + return -1; + + /* EMRS(1) */ + if (ddr_command(d, 1 << rank, + 1, AMB_DCALCSR_OPCODE_MRS_EMRS)) + return -1; + + /* MRS: DLL reset */ + if (ddr_command(d, 1 << rank, + 0x1000000, AMB_DCALCSR_OPCODE_MRS_EMRS)) + return -1; + + udelay(20); + + if (ddr_command(d, 1 << rank, + 0x4000000, AMB_DCALCSR_OPCODE_PRECHARGE)) + return -1; + + if (ddr_command(d, 1 << rank, + 0, AMB_DCALCSR_OPCODE_REFRESH)) + return -1; + + if (ddr_command(d, 1 << rank, 0, + AMB_DCALCSR_OPCODE_REFRESH)) + return -1; + + /* burst length + cas latency */ + val = (((d->setup->bl & BL_BL8) ? 3 : 2) << 16) | + (1 << 19) /* interleaved burst */ | + (d->setup->t_cl << 20) | + (((d->setup->t_wr - 1) & 7) << 25); + + printk(BIOS_DEBUG, "MRS: 0x%08x\n", val); + if (ddr_command(d, 1 << rank, + val, AMB_DCALCSR_OPCODE_MRS_EMRS)) + return -1; + + /* OCD calibration default */ + if (ddr_command(d, 1 << rank, 0x03800001, + AMB_DCALCSR_OPCODE_MRS_EMRS)) + return -1; + + + odt = d->odt; + if (rank) + odt >>= 4; + + val = (d->setup->t_al << 19) | + ((odt & 1) << 18) | + ((odt & 2) << 21) | 1; + + printk(BIOS_DEBUG, "EMRS(1): 0x%08x\n", val); + + /* ODT, OCD exit, additive latency */ + if (ddr_command(d, 1 << rank, val, AMB_DCALCSR_OPCODE_MRS_EMRS)) + return -1; + } + return 0; +} + +static int i5000_amb_preinit(struct i5000_fbdimm *d) +{ + u32 *p32 = (u32 *)d->amb_personality_bytes; + u16 *p16 = (u16 *)d->amb_personality_bytes; + u32 id, drc, fbdsbcfg = 0x0909; + + printk(BIOS_DEBUG, "%s: %d/%d/%d\n", __func__, + d->branch->num, d->channel->num, d->num); + + i5000_amb_smbus_write_config32(d, 1, 0xb0, p32[0]); + i5000_amb_smbus_write_config16(d, 1, 0xb4, p16[2]); + + drc = (d->setup->t_al << 4) | (d->setup->t_cl); + printk(BIOS_SPEW, "DRC: %02X, CMD2DATANXT: %02x\n", drc, + d->cmd2datanxt[d->setup->ddr_speed]); + + switch(d->setup->ddr_speed) { + case DDR_533MHZ: + fbdsbcfg |= (1 << 16); + break; + case DDR_667MHZ: + fbdsbcfg |= (2 << 16); + break; + default: + return -1; + } + + printk(BIOS_DEBUG, "FBDSBCFGNXT: %08x\n", fbdsbcfg); + i5000_amb_smbus_write_config32(d, 1, AMB_FBDSBCFGNXT, fbdsbcfg); + i5000_amb_smbus_write_config32(d, 1, AMB_FBDLOCKTO, 0x1651); + i5000_amb_smbus_write_config8(d, 1, AMB_CMD2DATANXT, + d->cmd2datanxt[d->setup->ddr_speed]); + + i5000_amb_smbus_write_config8(d, 3, AMB_DRC, drc); + + if (!i5000_amb_smbus_read_config32(d, 0, 0, &id)) { + d->vendor = id & 0xffff; + d->device = id >> 16; + } + + pci_mmio_write_config8(d->branch->branchdev, + d->channel->num ? I5000_FBDSBTXCFG1 : I5000_FBDSBTXCFG0, 0x04); + return 0; +} + +static void i5000_fbd_next_state(struct i5000_fbd_branch *b, int state) +{ + int timeout = 10000; + device_t dev = b->branchdev; + + printk(BIOS_DEBUG, " FBD state branch %d: %02x,", b->num, state); + + pci_mmio_write_config8(dev, I5000_FBDHPC, state); + + printk(BIOS_DEBUG, "waiting for new state..."); + + while(pci_mmio_read_config8(dev, I5000_FBDST) != state && timeout--) + udelay(10); + + if (timeout) { + printk(BIOS_DEBUG, "done\n"); + return; + } + + printk(BIOS_ERR, "timeout while entering state %02x on branch %d\n", + state, b->num); +} + +static int i5000_wait_pattern_recognized(struct i5000_fbd_channel *c) +{ + int i = 10; + device_t dev = PCI_ADDR(0, c->branch->num ? 22 : 21, 0, + c->num ? I5000_FBDISTS1 : I5000_FBDISTS0); + + printk(BIOS_DEBUG, " waiting for pattern recognition..."); + while(pci_mmio_read_config16(dev, 0) != 0x1fff && --i > 0) + udelay(5000); + + printk(BIOS_DEBUG, i ? "done\n" : "failed\n"); + printk(BIOS_DEBUG, "%d/%d Round trip latency: %d\n", c->branch->num, c->num, + pci_mmio_read_config8(c->branch->branchdev, c->num ? I5000_FBDLVL1 : I5000_FBDLVL0) & 0x3f); + return !i; +} + +static const char *pattern_names[16] = { + "EI", "EI", "EI", "EI", + "EI", "EI", "EI", "EI", + "TS0", "TS1", "TS2", "TS3", + "RESERVED", "TS2 (merge disabled)", "TS2 (merge enabled)","All ones", +}; + +static int i5000_drive_pattern(struct i5000_fbd_channel *c, int pattern, int wait) +{ + device_t dev = PCI_ADDR(0, c->branch->num ? 22 : 21, 0, + c->num ? I5000_FBDICMD1 : I5000_FBDICMD0); + + printk(BIOS_DEBUG, " %d/%d driving pattern %s to AMB%d (%02x)\n", + c->branch->num, c->num, + pattern_names[(pattern >> 4) & 0xf], pattern & 3, pattern); + pci_mmio_write_config8(dev, 0, pattern); + + if (!wait) + return 0; + + return i5000_wait_pattern_recognized(c); +} + +static int i5000_set_ambpresent(struct i5000_fbd_channel *c) +{ + int i; + device_t branchdev = c->branch->branchdev; + u16 ambpresent = 0x8000; + + for(i = 0; i < I5000_MAX_DIMM_PER_CHANNEL; i++) { + if (c->dimm[i].present) + ambpresent |= (1 << i); + } + + printk(BIOS_DEBUG, "AMBPRESENT: %04x\n", ambpresent); + pci_write_config16(branchdev, + c->num ? + I5000_AMBPRESENT1 : \ + I5000_AMBPRESENT0, ambpresent); + + return 0; +} + + +static int i5000_drive_test_patterns(struct i5000_fbd_channel *c, int highest_amb, int mchpad) +{ + device_t branchdev = c->branch->branchdev; + int off = c->num ? 0x100 : 0; + u32 portctl; + int i, cnt = 1000; + + portctl = pci_mmio_read_config32(branchdev, I5000_FBD0IBPORTCTL + off); + portctl &= ~0x01000020; + if (mchpad) + portctl |= 0x00800000; + else + portctl &= ~0x00800000; + portctl &= ~0x01000020; + pci_mmio_write_config32(branchdev, I5000_FBD0IBPORTCTL + off, portctl); + + /* drive calibration patterns */ + if (i5000_drive_pattern(c, I5000_FBDICMD_TS0 | highest_amb, 1)) + return -1; + + if (i5000_drive_pattern(c, I5000_FBDICMD_TS1 | highest_amb, 1)) + return -1; + + while (!(pci_mmio_read_config32(branchdev, I5000_FBD0IBPORTCTL + off) & 4) && cnt--) + udelay(10); + + if (!cnt) { + printk(BIOS_ERR, "IBIST timeout\n"); + return -1; + } + + if (i5000_drive_pattern(c, I5000_FBDICMD_TS2 | highest_amb, 1)) + return -1; + + for(i = 0; i < highest_amb; i++) { + if ((i5000_drive_pattern(c, I5000_FBDICMD_TS2_NOMERGE | i, 1))) + return -1; + } + + if (i5000_drive_pattern(c, I5000_FBDICMD_TS2 | highest_amb, 1)) + return -1; + + if (i5000_drive_pattern(c, I5000_FBDICMD_TS3 | highest_amb, 1)) + return -1; + + if (i5000_set_ambpresent(c)) + return -1; + return 0; +} + +static int i5000_train_channel_idle(struct i5000_fbd_channel *c) +{ + int i; + u32 fbdsbcfg = 0x0b1b; + + switch(c->setup->ddr_speed) { + case DDR_533MHZ: + fbdsbcfg |= (1 << 16); + break; + case DDR_667MHZ: + fbdsbcfg |= (2 << 16); + break; + default: + return -1; + } + + pci_mmio_write_config8(c->branch->branchdev, + c->num ? I5000_FBDSBTXCFG1 : I5000_FBDSBTXCFG0, 0x05); + + for(i = 0; i < 4; i++) { + if (c->dimm[i].present) + i5000_amb_smbus_write_config32(c->dimm + i, 1, AMB_FBDSBCFGNXT, i ? (fbdsbcfg | 0x1000) : fbdsbcfg); + } + + return i5000_drive_pattern(c, I5000_FBDICMD_IDLE, 1); +} + +static int i5000_drive_test_patterns0(struct i5000_fbd_channel *c) +{ + if (i5000_train_channel_idle(c)) + return -1; + + return i5000_drive_test_patterns(c, c->highest_amb, 0); +} + +static int i5000_drive_test_patterns1(struct i5000_fbd_channel *c) +{ + if (i5000_train_channel_idle(c)) + return -1; + + return i5000_drive_test_patterns(c, c->highest_amb, 1); +} + +static int i5000_setup_channel(struct i5000_fbd_channel *c) +{ + device_t branchdev = c->branch->branchdev; + int off = c->branch->num ? 0x100 : 0; + u32 val; + + pci_mmio_write_config32(branchdev, I5000_FBD0IBTXPAT2EN + off, 0); + pci_mmio_write_config32(branchdev, I5000_FBD0IBTXPAT2EN + off, 0); + pci_mmio_write_config32(branchdev, I5000_FBD0IBTXMSK + off, 0x3ff); + pci_mmio_write_config32(branchdev, I5000_FBD0IBRXMSK + off, 0x1fff); + + pci_mmio_write_config16(branchdev, off + 0x0162, c->used ? 0x20db : 0x18db); + + /* unknown */ + val = pci_mmio_read_config32(branchdev, off + 0x0164); + val &= 0xfffbcffc; + val |= 0x4004; + pci_mmio_write_config32(branchdev, off + 0x164, val); + + pci_mmio_write_config32(branchdev, off + 0x15c, 0xff); + i5000_drive_pattern(c, I5000_FBDICMD_ALL_ONES, 0); + return 0; +} + +static int i5000_link_training0(struct i5000_fbd_branch *b) +{ + device_t branchdev = b->branchdev; + + pci_mmio_write_config8(branchdev, I5000_FBDPLLCTRL, b->used ? 0 : 1); + + if (i5000_for_each_channel(b, i5000_setup_channel)) + return -1; + + if (i5000_for_each_channel(b, i5000_train_channel_idle)) + return -1; + + i5000_fbd_next_state(b, I5000_FBDHPC_STATE_INIT); + + if (i5000_for_each_channel(b, i5000_drive_test_patterns0)) + return -1; + + i5000_fbd_next_state(b, I5000_FBDHPC_STATE_READY); + return 0; +} + +static int i5000_link_training1(struct i5000_fbd_branch *b) +{ + if (i5000_for_each_channel(b, i5000_train_channel_idle)) + return -1; + + i5000_fbd_next_state(b, I5000_FBDHPC_STATE_INIT); + + if (i5000_for_each_channel(b, i5000_drive_test_patterns1)) + return -1; + + i5000_fbd_next_state(b, I5000_FBDHPC_STATE_READY); + return 0; +} + + +static int i5000_amb_check(struct i5000_fbdimm *d) +{ + u32 id = i5000_amb_read_config32(d, 0, 0); + + printk(BIOS_DEBUG, "AMB %d/%d/%d ID: %04x:%04x\n", + d->branch->num, d->channel->num, d->num, + id & 0xffff, id >> 16); + + if ((id & 0xffff) != d->vendor || id >> 16 != d->device) { + printk(BIOS_ERR, "AMB mapping failed\n"); + return -1; + } + return 0; +} + +static int i5000_amb_postinit(struct i5000_fbdimm *d) +{ + u32 *p32 = (u32 *)d->amb_personality_bytes; + u16 *p16 = (u16 *)d->amb_personality_bytes; + + i5000_amb_write_config16(d, 1, 0xb6, p16[3]); + i5000_amb_write_config32(d, 1, 0xb8, p32[2]); + i5000_amb_write_config16(d, 1, 0xbc, p16[6]); + return 0; +} + +static int i5000_amb_dram_timing_init(struct i5000_fbdimm *d) +{ + struct i5000_fbd_setup *s; + u32 val, tref; + int refi; + + s = d->setup; + + printk(BIOS_DEBUG, "DIMM %d/%d/%d config:\n", + d->branch->num, d->channel->num, d->num); + + val = 0x44; + printk(BIOS_DEBUG, "\tDDR2ODTC: 0x%02x\n", val); + i5000_amb_write_config8(d, 4, AMB_DDR2ODTC, val); + + val = (0x0c << 24) | /* CLK control */ + (1 << 18) | /* ODTZ enabled */ + (((d->setup->bl & BL_BL8) ? 1 : 0) << 8) | /* 8 byte burst length supported */ + ((d->setup->t_al & 0x0f) << 4) | /* additive latency */ + (d->setup->t_cl & 0x0f); /* CAS latency */ + + if (d->ranks > 1) { + val |= (0x03 << 9); + } else { + val |= (0x01 << 9); + } + + printk(BIOS_DEBUG, "AMB_DRC: %08x\n", val); + i5000_amb_write_config32(d, 3, AMB_DRC, val); + + val = (d->sdram_width << 30) | + ((d->ranks == 2 ? 1 : 0) << 29) | + ((d->banks == 8 ? 1 : 0) << 28) | + ((d->rows - 13) << 26) | + ((d->columns - 10) << 24) | + (1 << 16) | /* Auto refresh exit */ + (0x27 << 8) | /* t_xsnr */ + (d->setup->t_rp << 4) | + (((d->t_ck_min * d->mtb_dividend) / d->mtb_divisor) & 0x0f); + + printk(BIOS_DEBUG, "\tAMB_DSREFTC: %08x\n", val); + i5000_amb_write_config32(d, 3, AMB_DSREFTC, val); + + tref = 15; + + switch(d->t_refi & 0x0f) { + case 0: + refi = 15625; + break; + case 1: + refi = 3900; + tref = 3; + break; + case 2: + refi = 7800; + tref = 7; + break; + case 3: + refi = 31250; + break; + case 4: + refi = 62500; + break; + case 5: + refi = 125000; + break; + default: + printk(BIOS_ERR, "unsupported t_refi value: %d, using 7.8us\n", + d->t_refi & 0x0f); + refi = 7800; + break; + } + + s->t_ref = tref; + val = delay_ns_to_clocks(d, refi) | (s->t_rfc << 16); + + printk(BIOS_DEBUG, "\tAMB_DAREFTC: %08x\n", val); + i5000_amb_write_config32(d, 3, AMB_DAREFTC, val); + + u8 t_r2w = ((s->bl & BL_BL8) ? 4 : 2) + + (((d->t_ck_min * d->mtb_dividend) / d->mtb_divisor)); + u8 t_w2r = (s->t_cl - 1) + ((s->bl & BL_BL8) ? 4 : 2) + s->t_wtr; + + val = ((6 - s->t_rp) << 8) | ((6 - s->t_rcd) << 10) | + ((26 - s->t_rc) << 12) | ((9 - s->t_wr) << 16) | + ((12 - t_w2r) << 20) | ((10 - t_r2w) << 24) | + ((s->t_rtp - 2) << 27); + + switch(s->t_ras) { + case 15: + val |= (1 << 29); + break; + case 12: + val |= (2 << 29); + break; + default: + break; + } + + printk(BIOS_DEBUG, "\tAMB_DRT: %08x\n", val); + i5000_amb_write_config32(d, 3, AMB_DRT, val); + return 0; +} + +static int i5000_do_amb_membist_start(struct i5000_fbdimm *d, int rank, int pattern) +{ + printk(BIOS_DEBUG, "DIMM %d/%d/%d rank %d pattern %d\n", + d->branch->num, d->channel->num, d->num, rank, pattern); + + i5000_amb_write_config32(d, 3, AMB_DAREFTC, + i5000_amb_read_config32(d, 3, AMB_DAREFTC) | 0x8000); + + i5000_amb_write_config32(d, 3, AMB_MBLFSRSED, 0x12345678); + i5000_amb_write_config32(d, 3, AMB_MBADDR, 0); + i5000_amb_write_config32(d, 3, AMB_MBCSR, 0x800000f0 | (rank << 20) | ((pattern & 3) << 8)); + return 0; +} + +static int i5000_do_amb_membist_status(struct i5000_fbdimm *d, int rank) +{ + int cnt = 1000; + u32 res; + + while((res = i5000_amb_read_config32(d, 3, AMB_MBCSR)) & (1 << 31) && cnt--) + udelay(1000); + + if (cnt && !(res & (1 << 30))) + return 0; + + printk(BIOS_ERR, "DIMM %d/%d/%d rank %d failed membist check\n", + d->branch->num, d->channel->num, d->num, rank); + return -1; +} + +static int i5000_amb_membist_zero1_start(struct i5000_fbdimm *d) +{ + if (i5000_do_amb_membist_start(d, 1, 0)) + return -1; + return 0; +} + +static int i5000_amb_membist_zero2_start(struct i5000_fbdimm *d) +{ + + if (d->ranks < 2) + return 0; + if (i5000_do_amb_membist_start(d, 2, 0)) + return -1; + return 0; +} + +static int i5000_amb_membist_status1(struct i5000_fbdimm *d) +{ + if (i5000_do_amb_membist_status(d, 1)) + return -1; + return 0; +} + +static int i5000_amb_membist_status2(struct i5000_fbdimm *d) +{ + if (d->ranks < 2) + return 0; + + if (i5000_do_amb_membist_status(d, 2)) + return -1; + return 0; +} + +static int i5000_amb_membist_end(struct i5000_fbdimm *d) +{ + printk(BIOS_DEBUG, "AMB_DRC MEMBIST: %08x\n", i5000_amb_read_config32(d, 3, AMB_DRC)); + return 0; +} + +static int i5000_membist(struct i5000_fbd_setup *setup) +{ + return i5000_for_each_dimm_present(setup, i5000_amb_membist_zero1_start) || + i5000_for_each_dimm_present(setup, i5000_amb_membist_status1) || + i5000_for_each_dimm_present(setup, i5000_amb_membist_zero2_start) || + i5000_for_each_dimm_present(setup, i5000_amb_membist_status2) || + i5000_for_each_dimm_present(setup, i5000_amb_membist_end); +} + +static int i5000_enable_mc_autorefresh(struct i5000_fbdimm *d) +{ + u32 tmp = i5000_amb_read_config32(d, 3, AMB_DSREFTC); + tmp &= ~(1 << 16); + printk(BIOS_DEBUG, "new AMB_DSREFTC: 0x%08x\n", tmp); + i5000_amb_write_config32(d, 3, AMB_DSREFTC, tmp); + return 0; +} + +static int i5000_amb_clear_error_status(struct i5000_fbdimm *d) +{ + i5000_amb_write_config32(d, 1, AMB_FERR, 9); + i5000_amb_write_config32(d, 1, AMB_NERR, 9); + i5000_amb_write_config32(d, 1, AMB_EMASK, 0xf2); + i5000_amb_write_config8(d, 3, 0x80, 0xcf); + i5000_amb_write_config8(d, 3, 0x81, 0xd3); + i5000_amb_write_config8(d, 3, 0x82, 0xf8); + return 0; +} + +static void i5000_program_mtr(struct i5000_fbd_channel *c, int mtr) +{ + u32 val; + + if (c->dimm[0].present || c->dimm[1].present) { + val = (((c->columns - 10) & 3) | + (((c->rows - 13) & 3) << 2) | + (((c->ranks == 2) ? 1 : 0) << 4) | + (((c->banks == 8) ? 1 : 0) << 5) | + ((c->width ? 1 : 0) << 6) | + (1 << 7) | /* Electrical Throttling enabled */ + (1 << 8)); /* DIMM present and compatible */ + printk(BIOS_DEBUG, "MTR0: %04x\n", val); + pci_mmio_write_config16(c->branch->branchdev, mtr, val); + } + + if (c->dimm[2].present || c->dimm[3].present) { + val = (((c->columns - 10) & 3) | + (((c->rows - 13) & 3) << 4) | + ((c->ranks ? 1 : 0) << 4) | + (((c->banks == 8) ? 1 : 0) << 5) | + ((c->width ? 1 : 0) << 6) | + (1 << 7) | /* Electrical Throttling enabled */ + (1 << 8)); /* DIMM present and compatible */ + printk(BIOS_DEBUG, "MTR1: %04x\n", val); + pci_mmio_write_config16(c->branch->branchdev, mtr+2, val); + } +} + +static int get_dmir(u8 *rankmap, int *_set, int limit) +{ + int i, dmir = 0, set = 0; + + for(i = 7; set < limit && i >= 0; i--) { + if (!(*rankmap & (1 << i))) + continue; + + *rankmap &= ~(1 << i); + + switch(limit) { + case 1: + dmir |= (i | + (i << 3) | + (i << 6) | + (i << 9)); + break; + case 2: + dmir |= (i << (set * 3)) | + (i << (6 + set * 3)); + break; + case 4: + dmir |= (i << (set * 3)); + break; + + default: + break; + } + set++; + } + *_set = set; + return dmir; +} + +static int i5000_setup_dmir(struct i5000_fbd_branch *b) +{ + struct i5000_fbdimm *d; + device_t dev = b->branchdev; + u8 rankmap = 0, dmir = 0; + u32 dmirval = 0; + int i, set, rankoffset = 0, ranksize = 0, ranks = 0; + + if (!b->used) + return 0; + + for(i = 0; i < I5000_MAX_DIMM_PER_CHANNEL; i++) { + rankmap >>= 2; + d = b->channel[0].dimm + i; + + if (!d->present) + continue; + + if (d->ranks == 2) { + rankmap |= 0xc0; + ranks += 2; + } else { + rankmap |= 0x40; + ranks++; + } + } + + printk(BIOS_DEBUG, "total ranks: %d, rankmap: %02x\n", ranks, rankmap); + + dmir = I5000_DMIR0; + + ranksize = b->channel[0].dimm[0].ranksize << 8; + + if (!b->setup->single_channel) + ranksize <<= 1; + + while(ranks) { + + if (ranks >= 4) + dmirval = get_dmir(&rankmap, &set, 4); + else if (ranks >= 2) + dmirval = get_dmir(&rankmap, &set, 2); + else + dmirval = get_dmir(&rankmap, &set, 1); + + ranks -= set; + + dmirval |= rankoffset + (set * ranksize); + + rankoffset += (set * ranksize); + + printk(BIOS_DEBUG, "DMIR%d: %08x\n", (dmir - I5000_DMIR0) >> 2, + dmirval); + pci_mmio_write_config32(dev, dmir, dmirval); + dmir += 4; + } + + for(; dmir <= I5000_DMIR4; dmir += 4) { + printk(BIOS_DEBUG, "DMIR%d: %08x\n", (dmir - I5000_DMIR0) >> 2, + dmirval); + pci_mmio_write_config32(dev, dmir, dmirval); + } + return rankoffset; +} + +static void i5000_setup_interleave(struct i5000_fbd_setup *setup) +{ + device_t dev16 = PCI_ADDR(0, 16, 1, 0); + u32 mir0, mir1, mir2, size0, size1, minsize, tmp; + + size0 = i5000_setup_dmir(&setup->branch[1]) >> 12; + size1 = i5000_setup_dmir(&setup->branch[0]) >> 12; + + minsize = MIN(size0, size1); + + if (size0 > size1) { + tmp = size1; + size1 = size0; + size0 = tmp; + } + + if (size0 == size1) { + mir0 = (size0 << 1) | 3; + mir1 = (size0 << 1); + mir2 = (size0 << 1); + } else if (!size0) { + mir0 = size1 | 1; + mir1 = size1; + mir2 = size1; + } else { + mir0 = (size0 << 1) | 3; + mir1 = (size1 + size0) | 1; + mir2 = size1 + size0; + } + + printk(BIOS_DEBUG, "MIR0: %04x\n", mir0); + printk(BIOS_DEBUG, "MIR1: %04x\n", mir1);; + printk(BIOS_DEBUG, "MIR2: %04x\n", mir2);; + + pci_mmio_write_config16(dev16, I5000_MIR0, mir0); + pci_mmio_write_config16(dev16, I5000_MIR1, mir1); + pci_mmio_write_config16(dev16, I5000_MIR2, mir2); +} + +static int i5000_dram_timing_init(struct i5000_fbd_setup *setup) +{ + device_t dev16 = PCI_ADDR(0, 16, 1, 0); + u32 tolm, drta, drtb, mc, mca; + int t_wrc, bl2; + + bl2 = (setup->bl & BL_BL8) ? 4 :2; + t_wrc = setup->t_rcd + (setup->t_cl - 1) + bl2 + + setup->t_wr + setup->t_rp; + + drta = (setup->t_ref & 0x0f) | + ((setup->t_rrd & 0x0f) << 4) | + ((setup->t_rfc & 0xff) << 8) | + ((setup->t_rc & 0x3f) << 16) | + ((t_wrc & 0x3f) << 22) | + (setup->t_al & 0x07) << 28; + + drtb = (bl2) | + (((1 + bl2 + setup->t_r2r) & 0x0f) << 4) | + (((setup->t_cl - 1 + bl2 + setup->t_wtr) & 0x0f) << 8) | + (((2 + bl2 + setup->t_r2w) & 0x0f) << 12) | + (((bl2 + setup->t_w2rdr) & 0x07) << 16); + + mc = (1 << 30) | /* enable retry */ + (3 << 25) | /* bad RAM threshold */ + (1 << 21) | /* INITDONE */ + (1 << 20) | /* FSB enable */ + /* Electrical throttling: 20 clocks */ + ((setup->ddr_speed == DDR_667MHZ ? 1 : 0) << 18) | + (1 << 8) | /* enhanced scrub mode */ + (1 << 7) | /* enable patrol scrub */ + (1 << 6) | /* enable demand scrubing */ + (1 << 5); /* enable northbound error detection */ + + printk(BIOS_DEBUG, "DRTA: 0x%08x DRTB: 0x%08x MC: 0x%08x\n", drta, drtb, mc); + pci_mmio_write_config32(dev16, I5000_DRTA, drta); + pci_mmio_write_config32(dev16, I5000_DRTB, drtb); + pci_mmio_write_config32(dev16, I5000_MC, mc); + + mca = pci_mmio_read_config32(dev16, I5000_MCA); + + mca |= (7 << 28); + if (setup->single_channel) + mca |= (1 << 14); + else + mca &= ~(1 << 14); + printk(BIOS_DEBUG, "MCA: 0x%08x\n", mca); + pci_mmio_write_config32(dev16, I5000_MCA, mca); + + pci_mmio_write_config32(dev16, I5000_ERRPERR, 0xffffffff); + + i5000_program_mtr(&setup->branch[0].channel[0], I5000_MTR0); + i5000_program_mtr(&setup->branch[0].channel[1], I5000_MTR1); + i5000_program_mtr(&setup->branch[1].channel[0], I5000_MTR0); + i5000_program_mtr(&setup->branch[1].channel[1], I5000_MTR1); + + i5000_setup_interleave(setup); + + if ((tolm = MIN(setup->totalmem, 0xe00)) > 0xe00) + tolm = 0xe00; + + tolm <<= 4; + printk(BIOS_DEBUG, "TOLM: 0x%04x\n", tolm); + pci_mmio_write_config16(dev16, I5000_TOLM, tolm); + return 0; +} + +static void i5000_init_setup(struct i5000_fbd_setup *setup) +{ + int branch, channel, dimm, i = 0; + struct i5000_fbdimm *d; + struct i5000_fbd_channel *c; + struct i5000_fbd_branch *b; + + setup->bl = 3; + /* default to highest memory frequency. If a module doesn't + support it, it will decrease this setting in spd_read */ + setup->ddr_speed = DDR_667MHZ; + + for(branch = 0; branch < I5000_MAX_BRANCH; branch++) { + b = setup->branch + branch; + b->branchdev = PCI_ADDR(0, branch ? 22 : 21, 0, 0); + b->setup = setup; + b->num = branch; + + for(channel = 0; channel < I5000_MAX_CHANNEL; channel++) { + c = b->channel + channel; + c->branch = b; + c->setup = setup; + c->num = channel; + + for(dimm = 0; dimm < I5000_MAX_DIMM_PER_CHANNEL; dimm++) { + d = c->dimm + dimm; + setup->dimms[i++] = d; + d->channel = c; + d->branch = b; + d->setup = setup; + d->num = dimm; + d->ambase = (b->num << 16) | (c->num << 15) | (dimm << 11); + } + } + } +} + +static void i5000_reserved_register_init(struct i5000_fbd_setup *setup) +{ + /* register write captured from vendor BIOS, but undocument by Intel */ + pci_mmio_write_config32(PCI_ADDR(0, 16, 0, 0), I5000_PROCENABLE, 0x487f7c); + + pci_mmio_write_config32(PCI_ADDR(0, 16, 0, 0), 0xf4, 0x1588106); + pci_mmio_write_config32(PCI_ADDR(0, 16, 0, 0), 0xfc, 0x80); + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), 0x5c, 0x08); + pci_mmio_write_config32(PCI_ADDR(0, 16, 0, 0), 0x70, 0xfe2c08d); + pci_mmio_write_config32(PCI_ADDR(0, 16, 0, 0), 0x78, 0xfe2c08d); + + pci_mmio_write_config32(PCI_ADDR(0, 16, 0, 0), 0x140, 0x18000000); + pci_mmio_write_config32(PCI_ADDR(0, 16, 0, 0), 0x440, 0x18000000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x18c, 0x18000000); + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), 0x180, 0x18000000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x180, 0x87ffffff); + + pci_mmio_write_config32(PCI_ADDR(0, 0, 0, 0), 0x200, 0x18000000); + pci_mmio_write_config32(PCI_ADDR(0, 4, 0, 0), 0x200, 0x18000000); + pci_mmio_write_config32(PCI_ADDR(0, 0, 0, 0), 0x208, 0x18000000); + pci_mmio_write_config32(PCI_ADDR(0, 4, 0, 0), 0x208, 0x18000000); + + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x184, 0x01249249); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x154, 0x00000000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x158, 0x02492492); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x15c, 0x00000000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x160, 0x00000000); + + pci_mmio_write_config16(PCI_ADDR(0, 19, 0, 0), 0x0090, 0x00000007); + pci_mmio_write_config16(PCI_ADDR(0, 19, 0, 0), 0x0092, 0x0000000f); + + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x0154, 0x10); + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x0454, 0x10); + + pci_mmio_write_config32(PCI_ADDR(0, 19, 0, 0), 0x007C, 0x00000001); + pci_mmio_write_config32(PCI_ADDR(0, 19, 0, 0), 0x007C, 0x00000000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x0108, 0x000003F0); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x010C, 0x00000042); + pci_mmio_write_config16(PCI_ADDR(0, 17, 0, 0), 0x0112, 0x0000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x0114, 0x00A0494C); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x0118, 0x0002134C); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x013C, 0x0C008000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x0140, 0x0C008000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x0144, 0x00008000); + pci_mmio_write_config32(PCI_ADDR(0, 17, 0, 0), 0x0148, 0x00008000); + pci_mmio_write_config32(PCI_ADDR(0, 19, 0, 0), 0x007C, 0x00000002); + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), 0x01F4, 0x00000800); + + if (setup->branch[0].channel[0].used) + pci_mmio_write_config32(PCI_ADDR(0, 21, 0, 0), 0x010C, 0x004C0C10); + + if (setup->branch[0].channel[1].used) + pci_mmio_write_config32(PCI_ADDR(0, 21, 0, 0), 0x020C, 0x004C0C10); + + if (setup->branch[1].channel[0].used) + pci_mmio_write_config32(PCI_ADDR(0, 22, 0, 0), 0x010C, 0x004C0C10); + + if (setup->branch[1].channel[1].used) + pci_mmio_write_config32(PCI_ADDR(0, 22, 0, 0), 0x020C, 0x004C0C10); +} +static void i5000_dump_error_registers(void) +{ + device_t dev = PCI_ADDR(0, 16, 1, 0); + + printk(BIOS_ERR, "Dump of FBD error registers:\n" + "FERR_FAT_FBD: 0x%08x NERR_FAT_FBD: 0x%08x\n" + "FERR_NF_FBD: 0x%08x NERR_NF_FBD: 0x%08x\n" + "EMASK_FBD: 0x%08x\n" + "ERR0_FBD: 0x%08x\n" + "ERR1_FBD: 0x%08x\n" + "ERR2_FBD: 0x%08x\n" + "MC_ERR_FBD: 0x%08x\n", + pci_mmio_read_config32(dev, I5000_FERR_FAT_FBD), + pci_mmio_read_config32(dev, I5000_NERR_FAT_FBD), + pci_mmio_read_config32(dev, I5000_FERR_NF_FBD), + pci_mmio_read_config32(dev, I5000_NERR_NF_FBD), + pci_mmio_read_config32(dev, I5000_EMASK_FBD), + pci_mmio_read_config32(dev, I5000_ERR0_FBD), + pci_mmio_read_config32(dev, I5000_ERR1_FBD), + pci_mmio_read_config32(dev, I5000_ERR2_FBD), + pci_mmio_read_config32(dev, I5000_MCERR_FBD)); + + printk(BIOS_ERR, "Non recoverable error registers:\n" + "NRECMEMA: 0x%08x NRECMEMB: 0x%08x\n" + "NRECFGLOG: 0x%08x\n", + pci_mmio_read_config32(dev, I5000_NRECMEMA), + pci_mmio_read_config32(dev, I5000_NRECMEMB), + pci_mmio_read_config32(dev, I5000_NRECFGLOG)); + + printk(BIOS_ERR, "Packet data:\n" + "NRECFBDA: 0x%08x\n" + "NRECFBDB: 0x%08x\n" + "NRECFBDC: 0x%08x\n" + "NRECFBDD: 0x%08x\n" + "NRECFBDE: 0x%08x\n", + pci_mmio_read_config32(dev, I5000_NRECFBDA), + pci_mmio_read_config32(dev, I5000_NRECFBDB), + pci_mmio_read_config32(dev, I5000_NRECFBDC), + pci_mmio_read_config32(dev, I5000_NRECFBDD), + pci_mmio_read_config32(dev, I5000_NRECFBDE)); + + printk(BIOS_ERR, "recoverable error registers:\n" + "RECMEMA: 0x%08x RECMEMB: 0x%08x\n" + "RECFGLOG: 0x%08x\n", + pci_mmio_read_config32(dev, I5000_RECMEMA), + pci_mmio_read_config32(dev, I5000_RECMEMB), + pci_mmio_read_config32(dev, I5000_RECFGLOG)); + + printk(BIOS_ERR, "Packet data:\n" + "RECFBDA: 0x%08x\n" + "RECFBDB: 0x%08x\n" + "RECFBDC: 0x%08x\n" + "RECFBDD: 0x%08x\n" + "RECFBDE: 0x%08x\n", + pci_mmio_read_config32(dev, I5000_RECFBDA), + pci_mmio_read_config32(dev, I5000_RECFBDB), + pci_mmio_read_config32(dev, I5000_RECFBDC), + pci_mmio_read_config32(dev, I5000_RECFBDD), + pci_mmio_read_config32(dev, I5000_RECFBDE)); + +} + +static void i5000_try_restart(const char *msg) +{ + printk(BIOS_INFO, msg); + i5000_dump_error_registers(); +// outb(0x06, 0xcf9); + for(;;) asm volatile("hlt"); +} + +static void i5000_pam_setup(void) +{ + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x59, 0x30); + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x5a, 0x33); + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x5b, 0x33); + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x5c, 0x33); + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x5d, 0x33); + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x5e, 0x33); + pci_mmio_write_config8(PCI_ADDR(0, 16, 0, 0), 0x5f, 0x33); +} + +static int i5000_setup_clocking(struct i5000_fbd_setup *setup) +{ + int fbd, fsb, ddrfrq, ddrfrqnow; + msr_t msr; + device_t dev = PCI_ADDR(0, 16, 1, 0); + + switch(setup->ddr_speed) { + case DDR_667MHZ: + fbd = 667; + break; + case DDR_533MHZ: + fbd = 533; + break; + default: + printk(BIOS_ERR, "%s: unsupported FBD speed\n", __func__); + return 1; + } + + /* mainboard specific callback */ + if (mainboard_set_fbd_clock(fbd)) { + printk(BIOS_ERR, "%s: failed to set FBD speed\n", __func__); + return 1; + } + + msr = rdmsr(0xcd); + + switch(msr.lo & 7) { + case 1: + fsb = 533; + break; + case 4: + fsb = 667; + break; + default: + printk(BIOS_ERR, "%s: unsupported FSB speed: %d\n", __func__, msr.lo & 7); + return 1; + } + + + ddrfrq = pci_mmio_read_config8(PCI_ADDR(0, 16, 1, 0), 0x56); + ddrfrqnow = ddrfrq; + ddrfrq &= ~0x3; + + if (fsb < fbd) + ddrfrq |= 2; + else if (fsb > fbd) + ddrfrq |= 3; + + switch((ddrfrq >> 4) & 3) { + case 0: /* 1:1 mapping */ + pci_mmio_write_config32(dev, I5000_FBDTOHOSTGRCFG0, 0xffffffff); + pci_mmio_write_config32(dev, I5000_FBDTOHOSTGRCFG1, 0x00000000); + pci_mmio_write_config32(dev, I5000_HOSTTOFBDGRCFG, 0xffffffff); + pci_mmio_write_config8(dev, I5000_GRFBDLVLDCFG, 0x00); + pci_mmio_write_config8(dev, I5000_GRHOSTFULLCFG, 0x00); + pci_mmio_write_config8(dev, I5000_GRBUBBLECFG, 0x00); + pci_mmio_write_config8(dev, I5000_GRFBDTOHOSTDBLCFG, 0x00); + break; + case 2: /* 4:5 mapping */ + pci_mmio_write_config32(dev, I5000_FBDTOHOSTGRCFG0, 0x00002323); + pci_mmio_write_config32(dev, I5000_FBDTOHOSTGRCFG1, 0x00000400); + pci_mmio_write_config32(dev, I5000_HOSTTOFBDGRCFG, 0x23023); + pci_mmio_write_config8(dev, I5000_GRFBDLVLDCFG, 0x04); + pci_mmio_write_config8(dev, I5000_GRHOSTFULLCFG, 0x08); + pci_mmio_write_config8(dev, I5000_GRBUBBLECFG, 0x00); + pci_mmio_write_config8(dev, I5000_GRFBDTOHOSTDBLCFG, 0x04); + break; + case 3: + /* 5:4 mapping */ + pci_mmio_write_config32(dev, I5000_FBDTOHOSTGRCFG0, 0x00023230); + pci_mmio_write_config32(dev, I5000_FBDTOHOSTGRCFG1, 0x00000000); + pci_mmio_write_config32(dev, I5000_HOSTTOFBDGRCFG, 0x4323); + pci_mmio_write_config8(dev, I5000_GRFBDLVLDCFG, 0x00); + pci_mmio_write_config8(dev, I5000_GRHOSTFULLCFG, 0x02); + pci_mmio_write_config8(dev, I5000_GRBUBBLECFG, 0x10); + pci_mmio_write_config8(dev, I5000_GRFBDTOHOSTDBLCFG, 0x00); + break; + default: + printk(BIOS_DEBUG, "invalid DDRFRQ: %02x\n", ddrfrq); + return -1; + } + + if (ddrfrq != ddrfrqnow) { + printk(BIOS_DEBUG, "old DDRFRQ: 0x%02x new DDRFRQ: 0x%02x\n", + ddrfrqnow, ddrfrq); + pci_mmio_write_config8(PCI_ADDR(0, 16, 1, 0), 0x56, ddrfrq); + /* FSB:FBD mapping changed, needs hard reset */ + outb(0x06, 0xcf9); + for(;;) asm volatile("hlt"); + } + return 0; +} + +void i5000_fbdimm_init(void) +{ + struct i5000_fbd_setup setup; + u32 mca, mc; + + memset(&setup, 0, sizeof(setup)); + + pci_mmio_write_config16(PCI_ADDR(0, 0, 0, 0), 0x4, 0x144); + + i5000_init_setup(&setup); + + pci_write_config32(PCI_DEV(0, 16, 0), 0xf0, + pci_mmio_read_config32(PCI_ADDR(0, 16, 0, 0), 0xf0) | 0x8000); + + i5000_clear_fbd_errors(); + + printk(BIOS_INFO, "detecting memory modules\n"); + if (i5000_for_each_dimm(&setup, i5000_read_spd_data)) { + printk(BIOS_ERR, "%s: failed to read SPD data\n", __func__); + return; + } + + if (i5000_setup_clocking(&setup)) { + printk(BIOS_ERR, "%s: failed to set FBD clock\n", __func__); + return; + } + + /* posted CAS requires t_AL = t_RCD - 1 */ + setup.t_al = setup.t_rcd - 1; + + printk(BIOS_DEBUG, "global timing parameters:\n" + "CL: %d RAS: %d WRC: %d RC: %d RFC: %d RRD: %d REF: %d W2RDR: %d\n" + "R2W: %d W2R: %d R2R: %d W2W: %d WTR: %d RCD: %d RP %d WR: %d RTP: %d AL: %d\n", + setup.t_cl, setup.t_ras, setup.t_wrc, setup.t_rc, setup.t_rfc, + setup.t_rrd, setup.t_ref, setup.t_w2rdr, setup.t_r2w, setup.t_w2r, + setup.t_r2r, setup.t_w2w, setup.t_wtr, setup.t_rcd, + setup.t_rp, setup.t_wr, setup.t_rtp, setup.t_al); + + setup.single_channel = (!(setup.branch[0].channel[1].used || + setup.branch[1].channel[0].used || + setup.branch[1].channel[1].used)); + + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), 0x019C, 0x8010c); + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), 0x01F4, 0); + + /* enable or disable single channel mode */ + mca = pci_mmio_read_config32(PCI_ADDR(0, 16, 1, 0), I5000_MCA); + if (setup.single_channel) + mca |= (1 << 14); + else + mca &= ~(1 << 14); + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), I5000_MCA, mca); + + /* + * i5000 supports burst length 8 only in single channel mode + * so strip BL_BL8 if we're operating in multichannel mode + */ + + if (!setup.single_channel) + setup.bl &= ~BL_BL8; + + if (!setup.bl) + die("No supported burst length found\n"); + + mc = pci_mmio_read_config32(PCI_ADDR(0, 16, 1, 0), I5000_MC); + /* disable error checking for training */ + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), I5000_MC, mc & ~0x20); + + printk(BIOS_INFO, "performing fbd link initialization..."); + if (i5000_for_each_branch(&setup, i5000_branch_reset) || + i5000_for_each_dimm_present(&setup, i5000_amb_preinit) || + i5000_for_each_branch(&setup, i5000_link_training0) || + i5000_for_each_dimm_present(&setup, i5000_amb_check) || + i5000_for_each_dimm_present(&setup, i5000_amb_postinit) || + i5000_for_each_branch(&setup, i5000_link_training1)) { + i5000_try_restart("failed\n"); + } + printk(BIOS_INFO, "done\n"); + printk(BIOS_INFO, "initializing memory..."); + + if (i5000_for_each_dimm_present(&setup, i5000_ddr_init) || + i5000_for_each_dimm_present(&setup, i5000_amb_dram_timing_init) || + i5000_for_each_dimm_present(&setup, i5000_ddr_calibration)) { + i5000_try_restart("failed\n"); + } + printk(BIOS_INFO,"done\n"); + printk(BIOS_INFO, "clearing memory..."); + + if (i5000_membist(&setup)) + i5000_try_restart("failed\n"); + else + printk(BIOS_INFO, "done\n"); + + if (i5000_for_each_dimm_present(&setup, i5000_enable_mc_autorefresh)) + i5000_try_restart("failed to enable auto refresh\n"); + + i5000_fbd_next_state(&setup.branch[0], I5000_FBDHPC_STATE_INIT); + i5000_fbd_next_state(&setup.branch[1], I5000_FBDHPC_STATE_INIT); + + if (i5000_for_each_branch(&setup, i5000_link_training0)) + i5000_try_restart("Channel training failed\n"); + + if (setup.branch[0].used) + i5000_fbd_next_state(&setup.branch[0], I5000_FBDHPC_STATE_READY); + + if (setup.branch[1].used) + i5000_fbd_next_state(&setup.branch[1], I5000_FBDHPC_STATE_READY); + + i5000_clear_fbd_errors(); + + /* enable error checking */ + pci_mmio_write_config32(PCI_ADDR(0, 16, 1, 0), I5000_MC, mc | 0x20); + + i5000_dram_timing_init(&setup); + + i5000_reserved_register_init(&setup); + + i5000_pam_setup(); + + if (i5000_for_each_dimm_present(&setup, i5000_amb_clear_error_status)) + i5000_try_restart("failed to clear error status\n"); + + if (setup.branch[0].used) + i5000_fbd_next_state(&setup.branch[0], I5000_FBDHPC_STATE_ACTIVE); + + if (setup.branch[1].used) + i5000_fbd_next_state(&setup.branch[1], I5000_FBDHPC_STATE_ACTIVE); + +#if CONFIG_NORTHBRIDGE_INTEL_I5000_RAM_CHECK + if (ram_check_nodie(0x000000, 0x0a0000) || + ram_check_nodie(0x100000, MIN(setup.totalmem * 1048576, 0xe0000000))) { + i5000_try_restart("RAM verification failed"); + + } +#endif + + printk(BIOS_INFO, "Memory initialization finished\n"); +} diff --git a/src/northbridge/intel/i5000/raminit.h b/src/northbridge/intel/i5000/raminit.h new file mode 100644 index 0000000..d3fa16a --- /dev/null +++ b/src/northbridge/intel/i5000/raminit.h @@ -0,0 +1,337 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2011 Sven Schnelle svens@stackframe.org + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of + * the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +#ifndef NORTHBRIDGE_I5000_RAMINIT_H +#define NORTHBRIDGE_I5000_RAMINIT_H + +#include <types.h> +#include <arch/io.h> +#include <arch/romcc_io.h> + +#define I5000_MAX_BRANCH 2 +#define I5000_MAX_CHANNEL 2 +#define I5000_MAX_DIMM_PER_CHANNEL 4 +#define I5000_MAX_DIMMS (I5000_MAX_BRANCH * I5000_MAX_CHANNEL * I5000_MAX_DIMM_PER_CHANNEL) + +#define I5000_FBDRST 0x53 + +#define I5000_SPD_BUSY (1 << 12) +#define I5000_SPD_SBE (1 << 13) +#define I5000_SPD_WOD (1 << 14) +#define I5000_SPD_RDO (1 << 15) + +#define I5000_SPD0 0x74 +#define I5000_SPD1 0x76 + +#define I5000_SPDCMD0 0x78 +#define I5000_SPDCMD1 0x7c + +#define I5000_FBDHPC 0x4f +#define I5000_FBDST 0x4b + +#define I5000_FBDHPC_STATE_RESET 0x00 +#define I5000_FBDHPC_STATE_INIT 0x10 +#define I5000_FBDHPC_STATE_READY 0x20 +#define I5000_FBDHPC_STATE_ACTIVE 0x30 + +#define I5000_FBDISTS0 0x58 +#define I5000_FBDISTS1 0x5a + +#define I5000_FBDLVL0 0x44 +#define I5000_FBDLVL1 0x45 + +#define I5000_FBDICMD0 0x46 +#define I5000_FBDICMD1 0x47 + +#define I5000_FBDICMD_IDLE 0x00 +#define I5000_FBDICMD_TS0 0x80 +#define I5000_FBDICMD_TS1 0x90 +#define I5000_FBDICMD_TS2 0xa0 +#define I5000_FBDICMD_TS3 0xb0 +#define I5000_FBDICMD_TS2_MERGE 0xd0 +#define I5000_FBDICMD_TS2_NOMERGE 0xe0 +#define I5000_FBDICMD_ALL_ONES 0xf0 + +#define I5000_AMBPRESENT0 0x64 +#define I5000_AMBPRESENT1 0x66 + +#define I5000_FBDSBTXCFG0 0xc0 +#define I5000_FBDSBTXCFG1 0xc1 + +#define I5000_PROCENABLE 0xf0 +#define I5000_FBD0IBPORTCTL 0x180 +#define I5000_FBD0IBTXPAT2EN 0x1a8 +#define I5000_FBD0IBRXPAT2EN 0x1ac + +#define I5000_FBD0IBTXMSK 0x18c +#define I5000_FBD0IBRXMSK 0x190 + +#define I5000_FBDPLLCTRL 0x1c0 + +/* dev 16, function 1 registers */ +#define I5000_MC 0x40 +#define I5000_DRTA 0x48 +#define I5000_DRTB 0x4c +#define I5000_ERRPERR 0x50 +#define I5000_MCA 0x58 +#define I5000_TOLM 0x6c +#define I5000_MIR0 0x80 +#define I5000_MIR1 0x84 +#define I5000_MIR2 0x88 +#define I5000_AMIR0 0x8c +#define I5000_AMIR1 0x90 +#define I5000_AMIR2 0x94 + +#define I5000_FERR_FAT_FBD 0x98 +#define I5000_NERR_FAT_FBD 0x9c +#define I5000_FERR_NF_FBD 0xa0 +#define I5000_NERR_NF_FBD 0xa4 +#define I5000_EMASK_FBD 0xa8 +#define I5000_ERR0_FBD 0xac +#define I5000_ERR1_FBD 0xb0 +#define I5000_ERR2_FBD 0xb4 +#define I5000_MCERR_FBD 0xb8 +#define I5000_NRECMEMA 0xbe +#define I5000_NRECMEMB 0xc0 +#define I5000_NRECFGLOG 0xc4 +#define I5000_NRECMEMA 0xbe +#define I5000_NRECFBDA 0xc8 +#define I5000_NRECFBDB 0xcc +#define I5000_NRECFBDC 0xd0 +#define I5000_NRECFBDD 0xd4 +#define I5000_NRECFBDE 0xd8 + +#define I5000_REDMEMB 0x7c +#define I5000_RECMEMA 0xe2 +#define I5000_RECMEMB 0xe4 +#define I5000_RECFGLOG 0xe8 +#define I5000_RECFBDA 0xec +#define I5000_RECFBDB 0xf0 +#define I5000_RECFBDC 0xf4 +#define I5000_RECFBDD 0xf8 +#define I5000_RECFBDE 0xfc + +#define I5000_FBDTOHOSTGRCFG0 0x160 +#define I5000_FBDTOHOSTGRCFG1 0x164 +#define I5000_HOSTTOFBDGRCFG 0x168 +#define I5000_GRFBDLVLDCFG 0x16c +#define I5000_GRHOSTFULLCFG 0x16d +#define I5000_GRBUBBLECFG 0x16e +#define I5000_GRFBDTOHOSTDBLCFG 0x16f + +/* dev 16, function 2 registers */ +#define I5000_FERR_GLOBAL 0x40 +#define I5000_NERR_GLOBAL 0x44 + +/* dev 21, function 0 registers */ +#define I5000_MTR0 0x80 +#define I5000_MTR1 0x84 +#define I5000_MTR2 0x88 +#define I5000_MTR3 0x8c +#define I5000_DMIR0 0x90 +#define I5000_DMIR1 0x94 +#define I5000_DMIR2 0x98 +#define I5000_DMIR3 0x9c +#define I5000_DMIR4 0xa0 + +#define DEFAULT_AMBASE 0xfe000000 + +/* AMB function 1 registers */ +#define AMB_FBDSBCFGNXT 0x54 +#define AMB_FBDLOCKTO 0x68 +#define AMB_EMASK 0x8c +#define AMB_FERR 0x90 +#define AMB_NERR 0x94 +#define AMB_CMD2DATANXT 0xe8 + +/* AMB function 3 registers */ +#define AMB_DAREFTC 0x70 +#define AMB_DSREFTC 0x74 +#define AMB_DRT 0x78 +#define AMB_DRC 0x7c + +#define AMB_MBCSR 0x40 +#define AMB_MBADDR 0x44 +#define AMB_MBLFSRSED 0xa4 + +/* AMB function 4 registers */ +#define AMB_DCALCSR 0x40 +#define AMB_DCALADDR 0x44 +#define AMB_DCALCSR_START (1 << 31) + +#define AMB_DCALCSR_OPCODE_NOP 0x00 +#define AMB_DCALCSR_OPCODE_REFRESH 0x01 +#define AMB_DCALCSR_OPCODE_PRECHARGE 0x02 +#define AMB_DCALCSR_OPCODE_MRS_EMRS 0x03 +#define AMB_DCALCSR_OPCODE_DQS_DELAY_CAL 0x05 +#define AMB_DCALCSR_OPCODE_RECV_ENABLE_CAL 0x0c +#define AMB_DCALCSR_OPCODE_SELF_REFRESH_ENTRY 0x0d + +#define AMB_DDR2ODTC 0xfc + +#define FBDIMM_SPD_SDRAM_ADDRESSING 0x04 +#define FBDIMM_SPD_MODULE_ORGANIZATION 0x07 +#define FBDIMM_SPD_FTB 0x08 +#define FBDIMM_SPD_MTB_DIVIDEND 0x09 +#define FBDIMM_SPD_MTB_DIVISOR 0x0a +#define FBDIMM_SPD_MIN_TCK 0x0b +#define FBDIMM_SPD_CAS_LATENCIES 0x0d +#define FBDIMM_SPD_CAS_MIN_LATENCY 0x0e +#define FBDIMM_SPD_T_WR 0x10 +#define FBDIMM_SPD_T_RCD 0x13 +#define FBDIMM_SPD_T_RRD 0x14 +#define FBDIMM_SPD_T_RP 0x15 +#define FBDIMM_SPD_T_RAS_RC_MSB 0x16 +#define FBDIMM_SPD_T_RAS 0x17 +#define FBDIMM_SPD_T_RC 0x18 +#define FBDIMM_SPD_T_RFC 0x19 +#define FBDIMM_SPD_T_WTR 0x1b +#define FBDIMM_SPD_T_RTP 0x1c +#define FBDIMM_SPD_BURST_LENGTHS_SUPPORTED 0x1d +#define FBDIMM_SPD_ODT 0x4f +#define FBDIMM_SPD_T_REFI 0x20 +#define FBDIMM_SPD_T_BB 0x83 +#define FBDIMM_SPD_CMD2DATA_800 0x54 +#define FBDIMM_SPD_CMD2DATA_667 0x55 +#define FBDIMM_SPD_CMD2DATA_533 0x56 + +void i5000_fbdimm_init(void); + +#define I5000_BURST4 0x01 +#define I5000_BURST8 0x02 +#define I5000_BURST_CHOP 0x80 + +#define I5000_ODT_50 4 +#define I5000_ODT_75 2 +#define I5000_ODT_150 1 + +enum ddr_speeds { + DDR_533MHZ, + DDR_667MHZ, + DDR_MAX, +}; + +struct i5000_fbdimm { + struct i5000_fbd_branch *branch; + struct i5000_fbd_channel *channel; + struct i5000_fbd_setup *setup; + enum ddr_speeds speed; + int num; + int present:1; + u32 ambase; + + /* SPD data */ + u8 amb_personality_bytes[14]; + u8 banks; + u8 rows; + u8 columns; + u8 ranks; + u8 odt; + u8 sdram_width; + u8 mtb_divisor; + u8 mtb_dividend; + u8 t_ck_min; + u8 min_cas_latency; + u8 t_rrd; + u16 t_rfc; + u8 t_wtr; + u8 t_refi; + u8 cmd2datanxt[DDR_MAX]; + + u16 vendor; + u16 device; + + /* memory rank size in MB */ + int ranksize; +}; + +struct i5000_fbd_channel { + struct i5000_fbdimm dimm[I5000_MAX_DIMM_PER_CHANNEL]; + struct i5000_fbd_branch *branch; + struct i5000_fbd_setup *setup; + int num; + int used; + int highest_amb; + int columns; + int rows; + int ranks; + int banks; + int width; + /* memory size in MB on this channel */ + int totalmem; +}; + +struct i5000_fbd_branch { + struct i5000_fbd_channel channel[I5000_MAX_CHANNEL]; + struct i5000_fbd_setup *setup; + device_t branchdev; + int num; + int used; + /* memory size in MB on this branch */ + int totalmem; +}; + +enum odt { + ODT_150OHM=1, + ODT_50OHM=4, + ODT_75OHM=2, +}; + +enum bl { + BL_BL4=1, + BL_BL8=2, +}; + +struct i5000_fbd_setup { + struct i5000_fbd_branch branch[I5000_MAX_BRANCH]; + struct i5000_fbdimm *dimms[I5000_MAX_DIMMS]; + enum bl bl; + enum ddr_speeds ddr_speed; + + int single_channel:1; + u32 tolm; + + /* global SDRAM timing parameters */ + u8 t_al; + u8 t_cl; + u8 t_ras; + u8 t_wrc; + u8 t_rc; + u8 t_rfc; + u8 t_rrd; + u8 t_ref; + u8 t_w2rdr; + u8 t_r2w; + u8 t_w2r; + u8 t_r2r; + u8 t_w2w; + u8 t_wtr; + u8 t_rcd; + u8 t_rp; + u8 t_wr; + u8 t_rtp; + /* memory size in MB */ + int totalmem; +}; + +int mainboard_set_fbd_clock(int); +#define AMB_ADDR(base, fn, reg) (base | ((fn & 7) << 8) | ((reg & 0xff))) +#endif diff --git a/src/northbridge/intel/i5000/udelay.c b/src/northbridge/intel/i5000/udelay.c new file mode 100644 index 0000000..6462fe0 --- /dev/null +++ b/src/northbridge/intel/i5000/udelay.c @@ -0,0 +1,84 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2007-2008 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <delay.h> +#include <stdint.h> +#include <cpu/x86/tsc.h> +#include <cpu/x86/msr.h> +#include <console/console.h> +/** + * Intel Core(tm) cpus always run the TSC at the maximum possible CPU clock + */ + +void udelay(u32 us) +{ + u32 dword; + tsc_t tsc, tsc1, tscd; + msr_t msr; + u32 fsb = 0, divisor; + u32 d; /* ticks per us */ + u32 dn = 0x1000000 / 2; /* how many us before we need to use hi */ + + msr = rdmsr(0xcd); + switch (msr.lo & 0x07) { + case 5: + fsb = 400; + break; + case 1: + fsb = 533; + break; + case 3: + fsb = 667; + break; + case 2: + fsb = 800; + break; + case 0: + fsb = 1067; + break; + case 4: + fsb = 1333; + break; + case 6: + fsb = 1600; + break; + } + + msr = rdmsr(0x198); + divisor = (msr.hi >> 8) & 0x1f; + + d = fsb * divisor; + + tscd.hi = us / dn; + tscd.lo = (us - tscd.hi * dn) * d; + + tsc1 = rdtsc(); + dword = tsc1.lo + tscd.lo; + if ((dword < tsc1.lo) || (dword < tscd.lo)) { + tsc1.hi++; + } + tsc1.lo = dword; + tsc1.hi += tscd.hi; + + tsc = rdtsc(); + + do { + tsc = rdtsc(); + } while ((tsc.hi < tsc1.hi) || ((tsc.hi == tsc1.hi) && (tsc.lo < tsc1.lo))); +}