coreboot August 2011

coreboot@coreboot.org

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217 discussions

New patch to review: 523ae5d Use preferred style of fixed-width integer types
by Jonathan A. Kollasch 01 Aug '11

01 Aug '11

Jonathan A. Kollasch (jakllsch(a)kollasch.net) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/125 -gerrit commit 523ae5d776879621fabe6f338c1b8c808636a57d Author: Jonathan A. Kollasch <jakllsch(a)kollasch.net> Date: Mon Aug 1 14:15:28 2011 -0500 Use preferred style of fixed-width integer types Change-Id: I1abaaa2af4de940584039f9b8c348bb57fb611e0 Signed-off-by: Jonathan A. Kollasch <jakllsch(a)kollasch.net> --- src/mainboard/msi/ms7135/mptable.c | 2 +- src/mainboard/msi/ms7135/romstage.c | 6 +++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/src/mainboard/msi/ms7135/mptable.c b/src/mainboard/msi/ms7135/mptable.c index fc1caa5..3412145 100644 --- a/src/mainboard/msi/ms7135/mptable.c +++ b/src/mainboard/msi/ms7135/mptable.c @@ -52,7 +52,7 @@ static void *smp_write_config_table(void *v) { device_t dev; struct resource *res; - uint32_t dword; + u32 dword; dev = dev_find_slot(bus_ck804[0], PCI_DEVFN(sbdn + 0x1, 0)); if (dev) { diff --git a/src/mainboard/msi/ms7135/romstage.c b/src/mainboard/msi/ms7135/romstage.c index 8609142..5feef79 100644 --- a/src/mainboard/msi/ms7135/romstage.c +++ b/src/mainboard/msi/ms7135/romstage.c @@ -68,8 +68,8 @@ static inline int spd_read_byte(unsigned device, unsigned address) static void sio_setup(void) { - uint32_t dword; - uint8_t byte; + u32 dword; + u8 byte; /* Subject decoding */ byte = pci_read_config8(PCI_DEV(0, CK804_DEVN_BASE + 1, 0), 0x7b); @@ -85,7 +85,7 @@ static void sio_setup(void) void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) { - static const uint16_t spd_addr[] = { + static const u16 spd_addr[] = { DIMM0, DIMM1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

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Re: [coreboot] git help: I can't get my whitespace cleanup in!
by Marc Jones 01 Aug '11

01 Aug '11

Hi Keith, On Mon, Aug 1, 2011 at 12:41 AM, Keith Hui <buurin(a)gmail.com> wrote: > I'm trying to get this back in after we switched to git: > > http://review.coreboot.org/122 > > All seems good except some whitespace fixes. Making the fix is easy, > submitting it through git is where I need help. > > Problem is I can't seem to get correct the sequence of commands. Right > now I would... > > git clone... > make gitconfig > Do the cleanup > git add the files > git commit > git rebase -i master > git push origin > > and now I don't know if I have done it right. At one time gerrit > rejected my submit, on next try the second submitted is identical to > the first. Another problem is a few other commits gets merged into > master in the meantime and it wants me to merge them in my local > before accepting my push, which is making me feel lost. > > At this point should i expect an incremental commit with the original, > submitted commit being the parent? How do I make sure gerrit know this > is for the same Change-Id? > > I'll admit before this I have never used git, and yes, I have read the > few sites about this. > > Thanks for your help. > An incremental commit on the same change ID needs to have the entire commit you want to make. You can't have two commits with one change-id. What you want to do is edit your commit, rebase -i, and edit the commit. You best option for getting more help is in #coreboot. Marc -- http://se-eng.com

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Trac reminder: list of new ticket(s)
by coreboot tracker 01 Aug '11

01 Aug '11

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New patch to review: 3d487da Add PCI IDs vor VIA VX900 chipset
by Alexandru Gagniuc 01 Aug '11

01 Aug '11

Alexandru Gagniuc (mr.nuke.me(a)gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/124 -gerrit commit 3d487dab9ae1a16bb98d3077caa3ac5bc70f8a29 Author: Alexandru Gagniuc <mr.nuke.me(a)gmail.com> Date: Mon Aug 1 05:16:20 2011 -0500 Add PCI IDs vor VIA VX900 chipset Change-Id: I59dc8caa22b66980560d5afb76eae801efaa29ad Signed-off-by: Alexandru Gagniuc <mr.nuke.me(a)gmail.com> --- src/include/device/pci_ids.h | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/src/include/device/pci_ids.h b/src/include/device/pci_ids.h index 9886199..0c06d74 100644 --- a/src/include/device/pci_ids.h +++ b/src/include/device/pci_ids.h @@ -1325,6 +1325,28 @@ #define PCI_DEVICE_ID_VIA_VX855_VGA 0x5122 #define PCI_DEVICE_ID_VIA_VX855_VLINK 0x7409 #define PCI_DEVICE_ID_VIA_VX855_MEMCTRL 0x3409 +/* VIA VX900 PCI IDs */ +#define PCI_DEVICE_ID_VIA_VX900_HOST_BR 0x0410 +#define PCI_DEVICE_ID_VIA_VX900_ERROR_REPORT 0x1410 +#define PCI_DEVICE_ID_VIA_VX900_CPU_CTR 0x2410 +#define PCI_DEVICE_ID_VIA_VX900_DRAM_CTR 0x3410 +#define PCI_DEVICE_ID_VIA_VX900_PWR_MGMT 0x4410 +#define PCI_DEVICE_ID_VIA_VX900_TRAF_CTR 0x5410 +#define PCI_DEVICE_ID_VIA_VX900_SCRATCH_REG 0x6410 +#define PCI_DEVICE_ID_VIA_VX900_NORTH_NB_SB_CTR 0x7410 +#define PCI_DEVICE_ID_VIA_VX900_LPC 0x8410 +#define PCI_DEVICE_ID_VIA_VX900_PEX1 0xa410 +#define PCI_DEVICE_ID_VIA_VX900_PEX2 0xb410 +#define PCI_DEVICE_ID_VIA_VX900_PEX3 0xc410 +#define PCI_DEVICE_ID_VIA_VX900_PEX4 0xd410 +#define PCI_DEVICE_ID_VIA_VX900_PEX_CTR 0xe410 +#define PCI_DEVICE_ID_VIA_VX900_SOUTH_NB_SB_CTR 0xa535 +#define PCI_DEVICE_ID_VIA_VX900_PCI_BR 0xb535 +#define PCI_DEVICE_ID_VIA_VX900_VGA 0x7122 +#define PCI_DEVICE_ID_VIA_VX900_VGA_UNKNOWN 0x9170 +#define PCI_DEVICE_ID_VIA_VX900_HDAC 0x3288 +#define PCI_DEVICE_ID_VIA_VX900_ETHERNER 0x3119 +/* VIA CN700 */ #define PCI_DEVICE_ID_VIA_CN700_AGP 0x0314 #define PCI_DEVICE_ID_VIA_CN700_ERR 0x1314 #define PCI_DEVICE_ID_VIA_CN700_HOST 0x2314

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New patch to review: fa78e5d Do not compile nuvoton wpcm450 early init
by Alexandru Gagniuc 01 Aug '11

01 Aug '11

Alexandru Gagniuc (mr.nuke.me(a)gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/123 -gerrit commit fa78e5d1efc9b155537562ed385ad76ddc216a3c Author: Alexandru Gagniuc <mr.nuke.me(a)gmail.com> Date: Mon Aug 1 03:54:58 2011 -0500 Do not compile nuvoton wpcm450 early init wpcm450 early_init.c was compiled whether or not this superio is selected. Change-Id: Iabc1970847b8383a01eb94012dcbec83dd774233 Signed-off-by: Alexandru Gagniuc <mr.nuke.me(a)gmail.com> --- src/superio/nuvoton/wpcm450/Makefile.inc | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/src/superio/nuvoton/wpcm450/Makefile.inc b/src/superio/nuvoton/wpcm450/Makefile.inc index c70b2fb..db88097 100644 --- a/src/superio/nuvoton/wpcm450/Makefile.inc +++ b/src/superio/nuvoton/wpcm450/Makefile.inc @@ -18,6 +18,6 @@ ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## -romstage-y += early_init.c +romstage-$(CONFIG_SUPERIO_NUVOTON_WPCM450) += early_init.c ramstage-$(CONFIG_SUPERIO_NUVOTON_WPCM450) += superio.c

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git help: I can't get my whitespace cleanup in!
by Keith Hui 31 Jul '11

31 Jul '11

I'm trying to get this back in after we switched to git: http://review.coreboot.org/122 All seems good except some whitespace fixes. Making the fix is easy, submitting it through git is where I need help. Problem is I can't seem to get correct the sequence of commands. Right now I would... git clone... make gitconfig Do the cleanup git add the files git commit git rebase -i master git push origin and now I don't know if I have done it right. At one time gerrit rejected my submit, on next try the second submitted is identical to the first. Another problem is a few other commits gets merged into master in the meantime and it wants me to merge them in my local before accepting my push, which is making me feel lost. At this point should i expect an incremental commit with the original, submitted commit being the parent? How do I make sure gerrit know this is for the same Change-Id? I'll admit before this I have never used git, and yes, I have read the few sites about this. Thanks for your help.

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Patch set updated: 367bfb7 cpu/intel/slot_1: Init L2 cache on SECC(2) CPUs.
by Keith Hui 31 Jul '11

31 Jul '11

Keith Hui (buurin(a)gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/122 -gerrit commit 367bfb756f320019b0ea316a98dd260754cade4f Author: Keith Hui <buurin(a)gmail.com> Date: Wed Jul 27 23:06:16 2011 -0400 cpu/intel/slot_1: Init L2 cache on SECC(2) CPUs. Bring from coreboot v1 support for initializing L2 cache on Slot 1 Pentium II/III CPUs, code names Klamath, Deschutes and Katmai. Build tested on ASUS P2B-LS and P3B-F. Boot tested on P2B-LS with Pentium III 600MHz, Katmai core. Also add missing include of model_68x in slot_1, to address a similar problem seen before r5945. Change-Id: I502e8481d1a20f0a2504685e7be16b57f59c8257 Signed-off-by: Keith Hui <buurin(a)gmail.com> --- src/cpu/intel/model_65x/model_65x_init.c | 3 + src/cpu/intel/model_67x/model_67x_init.c | 4 + src/cpu/intel/slot_1/Makefile.inc | 2 + src/cpu/intel/slot_1/l2_cache.c | 810 ++++++++++++++++++++++++++++++ src/include/cpu/intel/l2_cache.h | 102 ++++ 5 files changed, 921 insertions(+), 0 deletions(-) diff --git a/src/cpu/intel/model_65x/model_65x_init.c b/src/cpu/intel/model_65x/model_65x_init.c index 8f9fc66..dc889d8 100644 --- a/src/cpu/intel/model_65x/model_65x_init.c +++ b/src/cpu/intel/model_65x/model_65x_init.c @@ -27,6 +27,7 @@ #include <cpu/x86/lapic.h> #include <cpu/intel/microcode.h> #include <cpu/x86/cache.h> +#include <cpu/intel/l2_cache.h> static u32 microcode_updates[] = { #include "microcode-410-MU16522d.h" @@ -64,6 +65,8 @@ static void model_65x_init(device_t dev) /* Update the microcode */ intel_update_microcode(microcode_updates); + p6_configure_l2_cache(); + /* Enable the local cpu apics */ setup_lapic(); }; diff --git a/src/cpu/intel/model_67x/model_67x_init.c b/src/cpu/intel/model_67x/model_67x_init.c index 76a840e..12cb3a1 100644 --- a/src/cpu/intel/model_67x/model_67x_init.c +++ b/src/cpu/intel/model_67x/model_67x_init.c @@ -26,6 +26,7 @@ #include <cpu/intel/microcode.h> #include <cpu/x86/cache.h> #include <cpu/x86/msr.h> +#include <cpu/intel/l2_cache.h> static const uint32_t microcode_updates[] = { /* Include microcode updates here. */ @@ -46,6 +47,9 @@ static void model_67x_init(device_t cpu) /* Update the microcode */ intel_update_microcode(microcode_updates); + /* Initialize L2 cache */ + p6_configure_l2_cache(); + /* Turn on caching if we haven't already */ x86_enable_cache(); diff --git a/src/cpu/intel/slot_1/Makefile.inc b/src/cpu/intel/slot_1/Makefile.inc index 297ef18..a4de6e0 100644 --- a/src/cpu/intel/slot_1/Makefile.inc +++ b/src/cpu/intel/slot_1/Makefile.inc @@ -19,9 +19,11 @@ ## ramstage-y += slot_1.c +ramstage-y += l2_cache.c subdirs-y += ../model_6xx subdirs-y += ../model_65x subdirs-y += ../model_67x +subdirs-y += ../model_68x subdirs-y += ../model_6bx subdirs-y += ../../x86/tsc subdirs-y += ../../x86/mtrr diff --git a/src/cpu/intel/slot_1/l2_cache.c b/src/cpu/intel/slot_1/l2_cache.c new file mode 100644 index 0000000..9185722 --- /dev/null +++ b/src/cpu/intel/slot_1/l2_cache.c @@ -0,0 +1,810 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2000 Denis Dowling <dpd(a)alphalink.com.au> + * Copyright (C) 2010 Keith Hui <buurin(a)gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +/* + * Intel Pentium L2 Cache initialization. + * This code was developed by reverse engineering + * the BIOS. Where the code accesses documented + * registers I have added comments as best I can. + * Some undocumented registers on the Pentium II are + * used so some of the documentation is incomplete. + * + * References: + * Intel Architecture Software Developer's Manual + * Volume 3B: System Programming Guide, Part 2 (#253669) + * Appendix B.9 + */ + +/* This code is ported from coreboot v1. + * The L2 cache initalization sequence here only apply to SECC/SECC2 P6 family + * CPUs with Klamath (63x), Deschutes (65x) and Katmai (67x) cores. + * It is not required for Coppermine (68x) and Tualatin (6bx) cores. + * It is currently not known if Celerons with Mendocino (66x) core require the + * special initialization. + * Covington-core Celerons do not have L2 cache. + */ + +#include <stdint.h> +#include <console/console.h> +#include <string.h> +#include <cpu/cpu.h> +#include <cpu/x86/mtrr.h> +#include <cpu/intel/l2_cache.h> +#include <cpu/x86/cache.h> +#include <cpu/x86/msr.h> + +/* Latency Tables */ +struct latency_entry { + u8 key; + u8 value; +}; +/* +Latency maps for Deschutes and Katmai. +No such mapping is available for Klamath. + +Cache latency to +be written to L2 -----++++ +control register |||| +0000 xx 00 -----> 000 cccc 0 +|||| 00 66MHz +|||| 10 100MHz +|||| 01 133MHz (Katmai "B" only) +++++------ CPU frequency multiplier + +0000 2x +0001 3x +0010 4x +0011 5x +0100 2.5x +0101 3.5x +0110 4.5x +0111 5.5x +1000 6x +1001 7x +1010 8x +1011 Reserved +1100 6.5x +1101 7.5x +1110 1.5x +1111 2x + +*/ +static const struct latency_entry latency_650_t0[] = { + {0x10, 0x02}, {0x50, 0x02}, {0x20, 0x04}, {0x60, 0x06}, + {0x00, 0x08}, {0x40, 0x0C}, {0x12, 0x06}, {0x52, 0x0A}, + {0x22, 0x0E}, {0x62, 0x10}, {0x02, 0x10}, {0xFF, 0x00} +}; + +static const struct latency_entry latency_650_t1[] = { + {0x12, 0x14}, {0x52, 0x16}, {0x22, 0x16}, {0x62, 0x16}, + {0xFF, 0x00} +}; + +static const struct latency_entry latency_670_t0[] = { + {0x60, 0x06}, {0x00, 0x08}, {0x12, 0x06}, {0x52, 0x0A}, + {0x22, 0x0E}, {0x62, 0x10}, {0x02, 0x10}, {0x42, 0x02}, + {0x11, 0x0E}, {0x51, 0x0C}, {0x21, 0x02}, {0x61, 0x10}, + {0x01, 0x10}, {0x41, 0x02}, {0xFF, 0x00} +}; + +static const struct latency_entry latency_670_t1[] = { + {0x22, 0x18}, {0x62, 0x18}, {0x02, 0x1A}, {0x11, 0x18}, + {0xFF, 0x00} +}; + +static const struct latency_entry latency_670_t2[] = { + {0x22, 0x12}, {0x62, 0x14}, {0x02, 0x16}, {0x42, 0x1E}, + {0x11, 0x12}, {0x51, 0x16}, {0x21, 0x1E}, {0x61, 0x14}, + {0x01, 0x16}, {0x41, 0x1E}, {0xFF, 0x00} +}; + +/* Latency tables for 650 model/type */ +static const struct latency_entry *latency_650[] = { + latency_650_t0, latency_650_t1, latency_650_t1 +}; + +/* Latency tables for 670 model/type */ +static const struct latency_entry *latency_670[] = { + latency_670_t0, latency_670_t1, latency_670_t2 +}; + +int calculate_l2_latency(void) +{ + u32 eax, l, signature; + const struct latency_entry *latency_table, *le; + msr_t msr; + + /* First, attempt to get cache latency value from + IA32_PLATFORM_ID[56:53]. (L2 Cache Latency Read) + */ + msr = rdmsr(IA32_PLATFORM_ID); + + printk(BIOS_DEBUG,"rdmsr(IA32_PLATFORM_ID) = %x:%x\n", msr.hi, msr.lo); + + l = (msr.hi >> 20) & 0x1e; + + if (l == 0) { + /* If latency value isn't available from + IA32_PLATFORM_ID[56:53], read it from + L2 control register 0 for lookup from + tables. */ + int t, a; + + /* The raw code is read from L2 register 0, bits [7:4]. */ + a = read_l2(0); + if (a < 0) + return -1; + + a &= 0xf0; + + if ((a & 0x20) == 0) + t = 0; + else if (a == 0x20) + t = 1; + else if (a == 0x30) + t = 2; + else + return -1; + + printk(BIOS_DEBUG,"L2 latency type = %x\n", t); + + /* Get CPUID family/model */ + signature = cpuid_eax(1) & 0xfff0; + + /* Read EBL_CR_POWERON */ + msr = rdmsr(EBL_CR_POWERON); + /* Get clock multiplier and FSB frequency. + * Multiplier is in [25:22]. + * FSB is in [19:18] in Katmai, [19] in Deschutes ([18] is zero for them). + */ + eax = msr.lo >> 18; + if (signature == 0x650) { + eax &= ~0xf2; + latency_table = latency_650[t]; + } else if (signature == 0x670) { + eax &= ~0xf3; + latency_table = latency_670[t]; + } else + return -1; + + /* Search table for matching entry */ + for (le = latency_table; le->key != eax; le++) { + /* Fail if we get to the end of the table */ + if (le->key == 0xff) { + printk(BIOS_DEBUG, "Could not find key %02x in latency table\n", eax); + return -1; + } + } + + l = le->value; + } + + printk(BIOS_DEBUG,"L2 Cache latency is %d\n", l / 2); + + /* Writes the calculated latency in BBL_CR_CTL3[4:1]. */ + msr = rdmsr(BBL_CR_CTL3); + msr.lo &= 0xffffffe1; + msr.lo |= l; + wrmsr(BBL_CR_CTL3, msr); + + return 0; +} + + +/* Setup address, data_high:data_low into the L2 + * control registers and then issue command with correct cache way + */ +int signal_l2(u32 address, u32 data_high, u32 data_low, int way, u8 command) +{ + int i; + msr_t msr; + + /* Write L2 Address to BBL_CR_ADDR */ + msr.lo = address; + msr.hi = 0; + wrmsr(BBL_CR_ADDR, msr); + + /* Write data to BBL_CR_D{0..3} */ + msr.lo = data_low; + msr.hi = data_high; + for (i = BBL_CR_D0; i <= BBL_CR_D3; i++) { + wrmsr(i, msr); + } + + /* Put the command and way into BBL_CR_CTL */ + msr = rdmsr(BBL_CR_CTL); + msr.lo = (msr.lo & 0xfffffce0) | command | (way << 8); + wrmsr(BBL_CR_CTL, msr); + + /* Trigger L2 controller */ + msr.lo = 0; + msr.hi = 0; + wrmsr(BBL_CR_TRIG, msr); + + /* Poll the controller to see when done */ + for (i = 0; i < 0x100; i++) { + /* Read BBL_CR_BUSY */ + msr = rdmsr(BBL_CR_BUSY); + /* If not busy then return */ + if ((msr.lo & 1) == 0) + return 0; + } + + /* Return timeout code */ + return -1; +} + +/* Read the L2 Cache controller register at given address */ +int read_l2(u32 address) +{ + msr_t msr; + + /* Send a L2 Control Register Read to L2 controller */ + if (signal_l2(address << 5, 0, 0, 0, L2CMD_CR) != 0) + return -1; + + /* If OK then get the result from BBL_CR_ADDR */ + msr = rdmsr(BBL_CR_ADDR); + return (msr.lo >> 0x15); + +} + +/* Write data into the L2 controller register at address */ +int write_l2(u32 address, u32 data) +{ + int v1, v2, i; + + v1 = read_l2(0); + if (v1 < 0) + return -1; + + v2 = read_l2(2); + if (v2 < 0) + return -1; + + if ((v1 & 0x20) == 0) { + v2 &= 0x3; + v2++; + } else + v2 &= 0x7; + + /* This write has to be replicated to a number of places. Not sure what. */ + + for (i = 0; i < v2; i++) { + + u32 data1, data2; + // Bits legend + // data1 = ffffffff + // data2 = 000000dc + // address = 00aaaaaa + // Final address signalled: + // 000fffff fff000c0 000dcaaa aaa00000 + data1 = data & 0xff; + data1 = data1 << 21; + data2 = (i << 11) & 0x1800; + data1 |= data2; + data2 <<= 6; + data2 &= 0x20000; + data1 |= data2; + + /* Signal L2 controller */ + if (signal_l2((address << 5) | data1, 0, 0, 0, 3)) + return -1; + } + return 0; +} + +/* Write data_high:data_low into the cache at address1. Test address2 + * to see if the same data is returned. Return 0 if the data matches. + * return lower 16 bits if mismatched data if mismatch. Return -1 + * on error + */ +int test_l2_address_alias(u32 address1, u32 address2, + u32 data_high, u32 data_low) +{ + int d; + msr_t msr; + + /* Tag Write with Data Write for L2 */ + if (signal_l2(address1, data_high, data_low, 0, L2CMD_TWW)) + return -1; + + /* Tag Read with Data Read for L2 */ + if (signal_l2(address2, 0, 0, 0, L2CMD_TRR)) + return -1; + + /* Read data from BBL_CR_D[0-3] */ + for (d = BBL_CR_D0; d <= BBL_CR_D3; d++) { + msr = rdmsr(d); + if (msr.lo != data_low || msr.hi != data_high) + return (msr.lo & 0xffff); + } + + return 0; +} + +/* Calculates the L2 cache size. + * + * Reference: Intel(R) 64 and IA-32 Architectures Software Developer�s Manual + * Volume 3B: System Programming Guide, Part 2, Intel pub. 253669, pg. B-172. + * + */ +int calculate_l2_cache_size(void) +{ + int v; + msr_t msr; + u32 cache_setting; + u32 address, size, eax, bblcr3; + + v = read_l2(0); + if (v < 0) + return -1; + if ((v & 0x20) == 0) { + msr = rdmsr(BBL_CR_CTL3); + bblcr3 = msr.lo & ~BBLCR3_L2_SIZE; + /* + * Successively write in all the possible cache size per bank + * into BBL_CR_CTL3[17:13], starting from 256KB (00001) to 4MB (10000), + * and read the last value written and accepted by the cache. + * + * No idea why these bits are writable at all. + */ + for (cache_setting = BBLCR3_L2_SIZE_256K; + cache_setting <= BBLCR3_L2_SIZE_4M; cache_setting <<= 1) { + + eax = bblcr3 | cache_setting; + msr.lo = eax; + wrmsr(BBL_CR_CTL3, msr); + msr = rdmsr(BBL_CR_CTL3); + + /* Value not accepted */ + if (msr.lo != eax) + break; + } + + /* Backtrack to the last value that worked... */ + cache_setting >>= 1; + + /* and write it into BBL_CR_CTL3 */ + msr.lo &= ~BBLCR3_L2_SIZE; + msr.lo |= (cache_setting & BBLCR3_L2_SIZE); + + wrmsr(BBL_CR_CTL3, msr); + + printk(BIOS_DEBUG,"Maximum cache mask is %x\n", cache_setting); + + /* For now, BBL_CR_CTL3 has the highest cache "size" that register + * will accept. Now we'll ping the cache and see where it wraps. + */ + + /* Write aaaaaaaa:aaaaaaaa to address 0 in the l2 cache. + * If this "alias test" returns an "address", it means the + * cache cannot be written to properly, and we have a problem. + */ + v = test_l2_address_alias(0, 0, 0xaaaaaaaa, 0xaaaaaaaa); + if (v != 0) + return -1; + + /* Start with 32K wrap point (256KB actually) */ + size = 1; + address = 0x8000; + + while (1) { + v = test_l2_address_alias(address, 0, 0x55555555, + 0x55555555); + // Write failed. + if (v < 0) + return -1; + // It wraps here. + else if (v == 0) + break; + + size <<= 1; + address <<= 1; + + if (address > 0x200000) + return -1; + } + + /* Mask size */ + size &= 0x3e; + + /* Shift to [17:13] */ + size <<= 12; + + /* Set this into BBL_CR_CTL3 */ + msr = rdmsr(BBL_CR_CTL3); + msr.lo &= ~BBLCR3_L2_SIZE; + msr.lo |= size; + wrmsr(BBL_CR_CTL3, msr); + + printk(BIOS_DEBUG,"L2 Cache Mask is %x\n", size); + + /* Shift to [6:2] */ + size >>= 11; + + v = read_l2(2); + + if (v < 0) + return -1; + + printk(BIOS_DEBUG,"L2(2): %x ", v); + + v &= 0x3; + + /* Shift size right by v */ + size >>= v; + + /* Or in this size */ + v |= size; + + printk(BIOS_DEBUG,"-> %x\n", v); + + if (write_l2(2, v) != 0) + return -1; + } else { + // Some cache size information is available from L2 registers. + // Work from there. + int b, c; + + v = read_l2(2); + + printk(BIOS_DEBUG,"L2(2) = %x\n", v); + + if (v < 0) + return -1; + + // L2 register 2 bitmap: cc---bbb + b = v & 0x7; + c = v >> 6; + + v = 1 << c * b; + + v &= 0xf; + + printk(BIOS_DEBUG,"Calculated a = %x\n", v); + + if (v == 0) + return -1; + + /* Shift to 17:14 */ + v <<= 14; + + /* Write this size into BBL_CR_CTL3 */ + msr = rdmsr(BBL_CR_CTL3); + msr.lo &= ~BBLCR3_L2_SIZE; + msr.lo |= v; + wrmsr(BBL_CR_CTL3, msr); + } + + return 0; +} + +// L2 physical address range can be found from L2 control register 3, bits [2:0]. +int calculate_l2_physical_address_range(void) +{ + int r0, r3; + msr_t msr; + + r3 = read_l2(3); + if (r3 < 0) + return -1; + + r0 = read_l2(0); + if (r0 < 0) + return -1; + + if (r0 & 0x20) + r3 = 0x7; + else + r3 &= 0x7; + + printk(BIOS_DEBUG,"L2 Physical Address Range is %dM\n", (1 << r3) * 512); + + /* Shift into [22:20] to be saved into BBL_CR_CTL3. */ + r3 = r3 << 20; + + msr = rdmsr(BBL_CR_CTL3); + msr.lo &= ~BBLCR3_L2_PHYSICAL_RANGE; + msr.lo |= r3; + wrmsr(BBL_CR_CTL3, msr); + + return 0; +} + +int set_l2_ecc(void) +{ + u32 eax; + const u32 data1 = 0xaa55aa55; + const u32 data2 = 0xaaaaaaaa; + msr_t msr; + + /* Set User Supplied ECC in BBL_CR_CTL */ + msr = rdmsr(BBL_CR_CTL); + msr.lo |= BBLCR3_L2_SUPPLIED_ECC; + wrmsr(BBL_CR_CTL, msr); + + /* Write a value into the L2 Data ECC register BBL_CR_DECC */ + msr.lo = data1; + msr.hi = 0; + wrmsr(BBL_CR_DECC, msr); + + if (test_l2_address_alias(0, 0, data2, data2) < 0) + return -1; + + /* Read back ECC from BBL_CR_DECC */ + msr = rdmsr(BBL_CR_DECC); + eax = msr.lo; + + if (eax == data1) { + printk(BIOS_DEBUG,"L2 ECC Checking is enabled\n"); + + /* Set ECC Check Enable in BBL_CR_CTL3 */ + msr = rdmsr(BBL_CR_CTL3); + msr.lo |= BBLCR3_L2_ECC_CHECK_ENABLE; + wrmsr(BBL_CR_CTL3, msr); + } + + /* Clear User Supplied ECC in BBL_CR_CTL */ + msr = rdmsr(BBL_CR_CTL); + msr.lo &= ~BBLCR3_L2_SUPPLIED_ECC; + wrmsr(BBL_CR_CTL, msr); + + return 0; +} + +/* + * This is the function called from CPU initialization + * driver to set up P6 family L2 cache. + */ + +int p6_configure_l2_cache(void) +{ + msr_t msr, bblctl3; + unsigned int eax; + u16 signature; + int cache_size, bank; + int result, calc_eax; + int v, a; + + int badclk1, badclk2, clkratio; + int crctl3_or; + + printk(BIOS_INFO, "Configuring L2 cache... "); + + /* Read BBL_CR_CTL3 */ + bblctl3 = rdmsr(BBL_CR_CTL3); + /* If bit 23 (L2 Hardware disable) is set then done */ + /* These would be Covington core Celerons with no L2 cache */ + if (bblctl3.lo & BBLCR3_L2_NOT_PRESENT) { + printk(BIOS_INFO,"hardware disabled\n"); + return 0; + } + + signature = cpuid_eax(1) & 0xfff0; + + /* Klamath-specific bit settings for certain + preliminary checks. + */ + if (signature == 0x630) { + clkratio = 0x1c00000; + badclk2 = 0x1000000; + crctl3_or = 0x44000; + } else { + clkratio = 0x3c00000; + badclk2 = 0x3000000; + crctl3_or = 0x40000; + } + badclk1 = 0xc00000; + + /* Read EBL_CR_POWERON */ + msr = rdmsr(EBL_CR_POWERON); + eax = msr.lo; + /* Mask out [22-25] Clock frequency ratio */ + eax &= clkratio; + if (eax == badclk1 || eax == badclk2) { + printk(BIOS_ERR, "Incorrect clock frequency ratio %x\n", eax); + return -1; + } + + disable_cache(); + + /* Mask out from BBL_CR_CTL3: + * [0] L2 Configured + * [5] ECC Check Enable + * [6] Address Parity Check Enable + * [7] CRTN Parity Check Enable + * [8] L2 Enabled + * [12:11] Number of L2 banks + * [17:13] Cache size per bank + * [18] (Set below) + * [22:20] L2 Physical Address Range Support + */ + bblctl3.lo &= 0xff88061e; + /* Set: + * [17:13] = 00010 = 512Kbyte Cache size per bank (63x) + * [17:13] = 00000 = 128Kbyte Cache size per bank (all others) + * [18] Cache state error checking enable + */ + bblctl3.lo |= crctl3_or; + + /* Write BBL_CR_CTL3 */ + wrmsr(BBL_CR_CTL3, bblctl3); + + if (signature != 0x630) { + eax = bblctl3.lo; + + /* Set the l2 latency in BBL_CR_CTL3 */ + if (calculate_l2_latency() != 0) + goto bad; + + /* Read the new latency values back */ + bblctl3 = rdmsr(BBL_CR_CTL3); + calc_eax = bblctl3.lo; + + /* Write back the original default value */ + bblctl3.lo = eax; + wrmsr(BBL_CR_CTL3, bblctl3); + + /* Write BBL_CR_CTL3[27:26] (reserved??) to bits [1:0] of L2 register 4. + * Apparently all other bits must be preserved, hence these code. + */ + + v = (calc_eax >> 26) & 0x3; + + printk(BIOS_DEBUG,"write_l2(4, %x)\n", v); + + a = read_l2(4); + if (a >= 0) + { + a &= 0xfffc; + a |= v; + a = write_l2(4, a); + /* a now contains result code from write_l2() */ + } + if (a != 0) + goto bad; + + /* Restore the correct latency value into BBL_CR_CTL3 */ + bblctl3.lo = calc_eax; + wrmsr(BBL_CR_CTL3, bblctl3); + } /* ! 63x CPU */ + + /* Read L2 register 0 */ + v = read_l2(0); + + /* If L2(0)[5] set (and can be read properly), enable CRTN and address parity + */ + if (v >= 0 && (v & 0x20)) { + bblctl3 = rdmsr(BBL_CR_CTL3); + bblctl3.lo |= (BBLCR3_L2_ADDR_PARITY_ENABLE | + BBLCR3_L2_CRTN_PARITY_ENABLE); + wrmsr(BBL_CR_CTL3, bblctl3); + } + + /* If something goes wrong at L2 ECC setup, cache ECC + * will just remain disabled. + */ + set_l2_ecc(); + + if (calculate_l2_physical_address_range() != 0) { + printk(BIOS_ERR, "Failed to calculate L2 physical address range"); + goto bad; + } + + if (calculate_l2_cache_size() != 0) { + printk(BIOS_ERR, "Failed to calculate L2 cache size"); + goto bad; + } + + /* Turn on cache. Only L1 is active at this time. */ + enable_cache(); + + /* Get the calculated cache size from BBL_CR_CTL3[17:13] */ + bblctl3 = rdmsr(BBL_CR_CTL3); + cache_size = (bblctl3.lo & BBLCR3_L2_SIZE); + if (cache_size == 0) + cache_size = 0x1000; + cache_size = cache_size << 3; + + /* TODO: Cache size above is per bank. We're supposed to get + * the number of banks from BBL_CR_CTL3[12:11]. + * Confirm that this still provides the correct answer. + */ + bank = (bblctl3.lo >> 11) & 0x3; + if (bank == 0) + bank = 1; + + printk(BIOS_INFO, "size %dK... ", cache_size * bank * 4 / 1024); + + /* Write to all cache lines to initialize */ + + while (cache_size > 0) { + + /* Each cache line is 32 bytes. */ + cache_size -= 32; + + /* Update each way */ + + /* We're supposed to get L2 associativity from BBL_CR_CTL3[10:9]. + * But this code only applies to certain members of the P6 processor family + * and since all P6 processors have 4-way L2 cache, we can safely assume + * 4 way for all cache operations. + */ + + for (v = 0; v < 4; v++) { + /* Send Tag Write w/Data Write (TWW) to L2 controller + * MESI = Invalid + */ + if (signal_l2(cache_size, 0, 0, v, L2CMD_TWW | L2CMD_MESI_I) != 0) { + printk(BIOS_ERR, "Failed on signal_l2(%x, %x)\n", + cache_size, v); + goto bad; + } + } + } + printk(BIOS_DEBUG, "L2 Cache lines initialized\n"); + + /* Disable cache */ + disable_cache(); + + /* Set L2 cache configured in BBL_CR_CTL3 */ + bblctl3 = rdmsr(BBL_CR_CTL3); + bblctl3.lo |= BBLCR3_L2_CONFIGURED; + wrmsr(BBL_CR_CTL3, bblctl3); + + /* Invalidate cache and discard unsaved writes */ + asm volatile ("invd"); + + /* Write 0 to L2 control register 5 */ + if (write_l2(5, 0) != 0) { + printk(BIOS_ERR,"write_l2(5, 0) failed\n"); + goto done; + } + + bblctl3 = rdmsr(BBL_CR_CTL3); + if (signature == 0x650) { + /* Change the L2 latency to 0101 then back to + * original value. I don't know why this is needed - dpd + */ + eax = bblctl3.lo; + bblctl3.lo &= ~BBLCR3_L2_LATENCY; + bblctl3.lo |= 0x0a; + wrmsr(BBL_CR_CTL3, bblctl3); + bblctl3.lo = eax; + wrmsr(BBL_CR_CTL3, bblctl3); + } + + /* Enable L2 in BBL_CR_CTL3 */ + bblctl3.lo |= BBLCR3_L2_ENABLED; + wrmsr(BBL_CR_CTL3, bblctl3); + + /* Turn on cache. Both L1 and L2 are now active. Wahoo! */ +done: + result = 0; + goto out; +bad: + result = -1; +out: + printk(BIOS_INFO, "done.\n"); + return result; +} + diff --git a/src/include/cpu/intel/l2_cache.h b/src/include/cpu/intel/l2_cache.h new file mode 100644 index 0000000..fb81129 --- /dev/null +++ b/src/include/cpu/intel/l2_cache.h @@ -0,0 +1,102 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2010 Keith Hui <buurin(a)gmail.com> + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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 + */ + +/* The L2 cache definitions here only apply to SECC/SECC2 P6 family CPUs + * with Klamath (63x), Deschutes (65x) and Katmai (67x) cores. + * It is not required for Coppermine (68x) and Tualatin (6bx) cores. + * It is currently not known if Celerons with Mendocino core require + * the special initialization. + * Covington-core Celerons do not have L2 cache. + */ + +/* This is a straight port from coreboot v1. */ + +#ifndef __P6_L2_CACHE_H +#define __P6_L2_CACHE_H + +#define IA32_PLATFORM_ID 0x17 +#define EBL_CR_POWERON 0x2A + +#define BBL_CR_D0 0x88 +#define BBL_CR_D1 0x89 +#define BBL_CR_D2 0x8A +#define BBL_CR_D3 0x8B + +#define BBL_CR_ADDR 0x116 +#define BBL_CR_DECC 0x118 +#define BBL_CR_CTL 0x119 +#define BBL_CR_TRIG 0x11A +#define BBL_CR_BUSY 0x11B +#define BBL_CR_CTL3 0x11E + +#define BBLCR3_L2_CONFIGURED (1<<0) +/* bits [4:1] */ +#define BBLCR3_L2_LATENCY 0x1e +#define BBLCR3_L2_ECC_CHECK_ENABLE (1<<5) +#define BBLCR3_L2_ADDR_PARITY_ENABLE (1<<6) +#define BBLCR3_L2_CRTN_PARITY_ENABLE (1<<7) +#define BBLCR3_L2_ENABLED (1<<8) +/* bits [17:13] */ +#define BBLCR3_L2_SIZE (0x1f << 13) +#define BBLCR3_L2_SIZE_256K (0x01 << 13) +#define BBLCR3_L2_SIZE_512K (0x02 << 13) +#define BBLCR3_L2_SIZE_1M (0x04 << 13) +#define BBLCR3_L2_SIZE_2M (0x08 << 13) +#define BBLCR3_L2_SIZE_4M (0x10 << 13) +/* bits [22:20] */ +#define BBLCR3_L2_PHYSICAL_RANGE (0x7 << 20); +/* TODO: This bitmask does not agree with Intel's documentation. + * Get confirmation one way or another. + */ +#define BBLCR3_L2_SUPPLIED_ECC 0x40000 + +#define BBLCR3_L2_HARDWARE_DISABLE (1<<23) +/* Also known as... */ +#define BBLCR3_L2_NOT_PRESENT (1<<23) + +/* L2 commands */ +#define L2CMD_RLU 0x0c /* 01100 Data read w/ LRU update */ +#define L2CMD_TRR 0x0e /* 01110 Tag read with data read */ +#define L2CMD_TI 0x0f /* 01111 Tag inquiry */ +#define L2CMD_CR 0x02 /* 00010 L2 control register read */ +#define L2CMD_CW 0x03 /* 00011 L2 control register write */ +#define L2CMD_TWR 0x08 /* 010-- Tag read w/ data read */ +#define L2CMD_TWW 0x1c /* 111-- Tag write w/ data write */ +#define L2CMD_TW 0x10 /* 100-- Tag write */ +/* MESI encode for L2 commands above */ +#define L2CMD_MESI_M 3 +#define L2CMD_MESI_E 2 +#define L2CMD_MESI_S 1 +#define L2CMD_MESI_I 0 + +extern int calculate_l2_latency(void); +extern int signal_l2(u32 address_low, u32 data_high, u32 data_low, int way, u8 command); +extern int read_l2(u32 address); +extern int write_l2(u32 address, u32 data); +extern int test_l2_address_alias(u32 address1, u32 address2, + u32 data_high, u32 data_low); +extern int calculate_l2_cache_size(void); +extern int calculate_l2_physical_address_range(void); +extern int set_l2_ecc(void); + +extern int p6_configure_l2_cache(void); + +#endif /* __P6_L2_CACHE_H */

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coreboot August 2011