coreboot April 2012

coreboot@coreboot.org

39 participants
459 discussions

#95: Run coreboot in VirtualBox
by coreboot 10 Dec '14

10 Dec '14

#95: Run coreboot in VirtualBox ---------------------------------+------------------------------------------ Reporter: uwe | Owner: somebody Type: defect | Status: new Priority: minor | Milestone: Component: misc | Version: Keywords: | Dependencies: Patchstatus: there is no patch | ---------------------------------+------------------------------------------ It would be nice if we could test coreboot images in VirtualBox, see http://virtualbox.org/. VirtualBox does not (yet) provide a simple mechanism to use a different BIOS in their emulated machines (something like "-L" in qemu). Instead the BIOS image (a custom bochs BIOS + LGPL'g VGABIOS) is converted to C code (an array of bytes, or the like) and merged into the VirtualBox executable. The relevant files are {{{ src/VBox/Devices/PC/DevPcBios.cpp bldprogs/bin2c.c }}} if someone want to hack VirtualBox to easily support using coreboot images instead of their usual BIOS. -- Ticket URL: <http://tracker.coreboot.org/trac/coreboot/ticket/95> coreboot <http://www.coreboot.org/>

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EHCI debug port finder
by Carl-Daniel Hailfinger 30 May '14

30 May '14

I wanted to know which physical port of my multiple USB controllers have the debug capability. There was no way to find that easily, so I created a tool which will do most of the work for the user. Example output: The following PCI devices support a USB debug port (says lspci): 0000:00:1d.7 The following PCI devices support a USB debug port (says the kernel): 0000:00:1d.7 PCI device 0000:00:1d.7, USB bus 3, USB physical port 1 Currently connected high-speed devices: /: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/6p, 480M |__ Port 2: Dev 20, If 0, Class=stor., Driver=usb-storage, 480M The output can be improved, but it's a good start. Regards, Carl-Daniel -- http://www.hailfinger.org/

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Dual SPI Flash adapter attempt 2.0
by Oliver Schinagl 09 Mar '14

09 Mar '14

Hi list(s), Here's my second attempt at routing the previously mailed png of my schema. It was a lot trickier to route then my previous version, but I think it worked out! As mentioned, S1 and S2 need to be shorted if U3 is to be omitted. RN1 should be 10k or ideally 100k, as Peter mentioned earlier. Hopefully there's no obvious mistakes and can start working on alternative layouts (so it is insert-able in different angles). DRC Check fails on S1, S2 and U3. It thinks the distance is to shallow. That said, DRC check passes when I set the copper width/distance to 7mil's instead of the current 8 mils. I'm planning on having these PCB's manufactured by Seeed studio and their minimal width is much smaller. Minimum trace width: 6mil Minimum trace/vias/pads space : 6mil Minimum silkscreen width : 4mil Minimum silkscreen text size : 32mil I've used a grid size of 10mil and distances of 8 mils, as I didn't want to rely on the minimum of seed. The silkscreen I positioned using a grid size of 5 mil's however. Not sure what they mean with a 'minimum silkscreen text size' however. Anyhow, feedback greatly appreciated, so I can start working on alternative layouts :)

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#186: 3com 3c905tx / gpxe boot problem
by coreboot 11 Jan '14

11 Jan '14

#186: 3com 3c905tx / gpxe boot problem -----------------------------------+---------------------------------- Reporter: jeroenkrabbendam@… | Owner: stepan@… Type: defect | Status: new Priority: minor | Milestone: Component: coreboot | Keywords: gpxe Dependencies: | Patch Status: there is no patch -----------------------------------+---------------------------------- Although (or: just because) novice in the field, I encountered some problems with netbooting with coreboot. Mobo's tried: Asus P2B, VTech with bios id ITE8671-2A69KV3IC-00. All mobo's boot '''harddisk''' fine with Asus P2B / Gigabyte GA-6BX{CE} respectively. NIC ROM is started, and loads the kernel by tftp. This is vvvveeeerrrryyy slow! Although loading, the kernel is never able to start itself. Same kernel on HDU is no problem at all (GRUB2) Note: the gpxe-image is on the nic, coreboot payload is seabios. -- Ticket URL: <https://tracker.coreboot.org/trac/coreboot/ticket/186> coreboot <http://www.coreboot.org/>

1 1

New patch to review: 49493f5 T60: add volume CMOS setting
by gerrit＠coreboot.org 28 Jan '13

28 Jan '13

Sven Schnelle (svens(a)stackframe.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/12 -gerrit

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#131: New flashrom motherboard support
by coreboot 18 Sep '12

18 Sep '12

#131: New flashrom motherboard support ---------------------------------+------------------------------------------ Reporter: anonymous | Owner: somebody Type: enhancement | Status: new Priority: trivial | Milestone: Going mainstream Component: flashrom | Version: v2 Keywords: flashrom asus | Dependencies: Patchstatus: there is no patch | ---------------------------------+------------------------------------------ Did not know where I should put this but the bugtracker seemed like the right place. I tried flashrom and it could not detect my chip on my ASUS P5ND2-SLI Deluxe motherboard. The board has a SST49LF004B flash chip and after enforcing the right chip flashrom seems to work fine. {{{ # ./flashrom -V -f -r -c SST49LF004A/B test Calibrating delay loop... 796M loops per second, 100 myus = 201 us. OK. No coreboot table found. WARNING: No chipset found. Flash detection will most likely fail. Probing for SST SST49LF004A/B, 512 KB: probe_jedec: id1 0x21, id2 0x5e, id1 parity violation No EEPROM/flash device found. Force read (-f -r -c) requested, forcing chip probe success: Probing for SST SST49LF004A/B, 512 KB: Found chip "SST SST49LF004A/B" (512 KB) at physical address 0xfff80000. Force reading flash... done. }}} This should probably apply to the P5ND-SLI board, too. What do you need from me for adding autodetection of this board/chip? -- Ticket URL: <http://tracker.coreboot.org/trac/coreboot/ticket/131> coreboot <http://www.coreboot.org/>

1 15

Re: [coreboot] how to delete symbol link created at compile time
by She, Kerry 18 Jul '12

18 Jul '12

> -----Original Message----- > From: Marc Jones [mailto:marcj303@gmail.com] > Sent: Tuesday, October 18, 2011 10:39 AM > To: Stefan Reinauer > Cc: She, Kerry; coreboot > Subject: Re: [coreboot] how to delete symbol link created at compile time > > On Mon, Oct 17, 2011 at 4:44 PM, Stefan Reinauer > <stefan.reinauer(a)coreboot.org> wrote: > > * Marc Jones <marcj303(a)gmail.com> [111016 10:10]: > >> >> > I have created 2 devicetree file : > >> >> > > >> >> > devicetree_f15.cb for platform with family 15 CPU > >> >> > > >> >> > devicetree_f10.cb for platform with family 10 CPU > >> >> > > >> >> > > >> >> > > >> >> > I changed the makefile to create a symbol link "devicetree.cb" > link to > >> >> > devicetree_f10.cb or devicetree_f15.cb at compile time. > >> >> > > >> >> > The problem is that I can't delete the symbol link when make > >> >> > clean/distclean. > >> > > >> > Please fix the problem by using one device tree for both platforms. > > > >> Stefan, > >> > >> Can you explain your thoughts on how that would work? Can we put a #if > >> in the devicetree.cb? It uses the c precompiler? It requires different > >> CPU files/device locations. We can try it next week. > > > > Usually the way this is handled in coreboot is that there is one socket > > that binds together all CPU types. Then in the device tree only the > > socket type is specified, and code for both CPUs is pulled in. > > Maybe we need something like a socket for northbridge code, since the > > northbridge now lives in the CPU? > > > > It seems like a bad idea to have to recompile your BIOS because you > > change the CPU. We did a lot of nastyness with K8 and Fam10, but we > > should find a better way to do this for future chipsets/CPUs. > > > Yes, we are discussing how the AGESA code would work. The socket > decision is rather complicated as we need a way to handle multiple > calls with the same names (function point tables etc). I think that > there may be a solution within AGESA, but the device tree may still be > a problem as the CPUs have different HT link numbering. This makes it > hard to have the same device tree layout for the same socket. Because of the function name conflict, put cpu code of 2 families together would not compile. We need to dig into AGESA more to figure out a solution. As for the devicetree problem, following text is the devicetree difference in detail: --- devicetree_fam10.cb 2011-08-15 15:00:14.426692437 +0800 +++ devicetree_fam15.cb 2011-08-15 15:00:14.426692437 +0800 @@ -16,19 +16,17 @@ # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA # -chip northbridge/amd/agesa/family10/root_complex +chip northbridge/amd/agesa/family15/root_complex device lapic_cluster 0 on - chip cpu/amd/agesa/family10 - device lapic 0x10 on end + chip cpu/amd/agesa/family15 + device lapic 0x20 on end end end device pci_domain 0 on subsystemid 0x15d9 0xab11 inherit #SuperMicro - chip northbridge/amd/agesa/family10 # CPU side of HT root complex - device pci 18.0 on end # link 0 - device pci 18.0 on end # link 1 - device pci 18.0 on end # link 2 - device pci 18.0 on # link 3, SB on socket0 link 2, on internal Node0 Link 3 + chip northbridge/amd/agesa/family15 # CPU side of HT root complex + device pci 18.0 on end # Link 0 + device pci 18.0 on # Link 1, IO-HUB on socket0 link 2(internal Node0 Link 1) chip northbridge/amd/cimx/rd890 # Southbridge PCI side of HT Root complex device pci 0.0 on end # HT Root Complex 0x9600

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List of possible porting targets
by Paul Menzel 12 May '12

12 May '12

Dear coreboot folks, since it is also quite a lot of work to find an appropriate board to port coreboot easily to (socketed flash chip, no embedded control), I think it would be a good to have such a list. The Wiki is probably a good place, but not all people want to request an account just for this. Therefore I think a thread on this list is good enough for this purpose. So if you find some board and you make some discoveries please reply to this message and report your findings. Thanks, Paul

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New patch to review for coreboot: aea1621 Fix issue with PCIe power management setup
by Stefan Reinauer 30 Apr '12

30 Apr '12

Stefan Reinauer (stefan.reinauer(a)coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/980 -gerrit commit aea1621bd1489a910483d2858dc5810c8d48207e Author: Duncan Laurie <dlaurie(a)chromium.org> Date: Fri Apr 27 10:58:22 2012 -0700 Fix issue with PCIe power management setup The current early PM setup that attempts to configure dynamic clock gating relies on PCIe functions to be enabled that may not be. Instead of reading port 0 or 4 directly to determine the link width use the register that refelects the soft strapping options as this will always be available. Also add a clear register assignment and break for port 0 in the switch statement instead of falling through to port 4 as that could end up setting the slot power limit based on port 4 values instead of based on port 0. register 0xE1=0x3f and all other root ports should have 0xE1=0x03. When port 0 and 4 are disabled they will have 0xE1=0x3C before being disabled by the pch enable handler. LUMPY default: 00:1c.0 PCI bridge: Intel Corporation Device 1c10 (rev b5) 00:1c.3 PCI bridge: Intel Corporation Device 1c16 (rev b5) pci_read8 0 0x1c 0 0xe1 0x3f pci_read8 0 0x1c 3 0xe1 0x03 LUMPY with PCIe port coalesce enabled: 00:1c.0 PCI bridge: Intel Corporation Device 1c10 (rev b5) 00:1c.1 PCI bridge: Intel Corporation Device 1c16 (rev b5) pci_read8 0 0x1c 0 0xe1 0x3f pci_read8 0 0x1c 1 0xe1 0x03 Change-Id: I33a37b0ec0c8e570cf5d9dda2c06e0225fee135c Signed-off-by: Duncan Laurie <dlaurie(a)chromium.org> --- src/southbridge/intel/bd82x6x/pcie.c | 44 ++++++++++++++++++++++++---------- 1 files changed, 31 insertions(+), 13 deletions(-) diff --git a/src/southbridge/intel/bd82x6x/pcie.c b/src/southbridge/intel/bd82x6x/pcie.c index 599692d..5ab18f6 100644 --- a/src/southbridge/intel/bd82x6x/pcie.c +++ b/src/southbridge/intel/bd82x6x/pcie.c @@ -25,17 +25,6 @@ #include <device/pci_ids.h> #include "pch.h" -static u16 pcie_port_link_width(int port) -{ - u16 link_width; - - link_width = pci_read_config16( - dev_find_slot(0, PCI_DEVFN(0x1c, port)), 0x52); - link_width >>= 4; - link_width &= 0x3f; - return link_width; -} - static void pch_pcie_pm_early(struct device *dev) { u16 link_width_p0, link_width_p4; @@ -43,8 +32,35 @@ static void pch_pcie_pm_early(struct device *dev) u32 reg32; u8 reg8; - link_width_p0 = pcie_port_link_width(0); - link_width_p4 = pcie_port_link_width(4); + reg32 = RCBA32(RPC); + + /* Port 0-3 link aggregation from PCIEPCS1[1:0] soft strap */ + switch (reg32 & 3) { + case 3: + link_width_p0 = 4; + break; + case 1: + case 2: + link_width_p0 = 2; + break; + case 0: + default: + link_width_p0 = 1; + } + + /* Port 4-7 link aggregation from PCIEPCS2[1:0] soft strap */ + switch ((reg32 >> 2) & 3) { + case 3: + link_width_p4 = 4; + break; + case 1: + case 2: + link_width_p4 = 2; + break; + case 0: + default: + link_width_p4 = 1; + } /* Enable dynamic clock gating where needed */ reg8 = pci_read_config8(dev, 0xe1); @@ -54,6 +70,8 @@ static void pch_pcie_pm_early(struct device *dev) slot_power_limit = 40; /* 40W for x4 */ else if (link_width_p0 == 2) slot_power_limit = 20; /* 20W for x2 */ + reg8 |= 0x3f; + break; case 4: /* Port 4 */ if (link_width_p4 == 4) slot_power_limit = 40; /* 40W for x4 */

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New patch to review for coreboot: 050c40f Add an option to enable PCIe root port coalescing
by Stefan Reinauer 30 Apr '12

30 Apr '12

Stefan Reinauer (stefan.reinauer(a)coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/979 -gerrit commit 050c40f1dcee3945709146abf0c8cfd47b4abca3 Author: Duncan Laurie <dlaurie(a)chromium.org> Date: Fri Apr 27 10:30:51 2012 -0700 Add an option to enable PCIe root port coalescing Background: The PCI spec (3.0-3.2.2.3.4) requires that PCI devices implement function 0. The Linux Kernel therefore will not enumerate a PCI device if it does not present a valid config space at function 0. If a board does not have anything connected to root port 0 and it is desired to disable the unused ports in order to save power then this will cause the other downstream PCIe devices to go missing as they will not be enumerated. Intel chipsets provide a way to map root port numbers to different PCI function numbers, thereby avoiding this issue and allowing root port 0 to be turned off. This change adds a new chip config option 'pcie_port_coalesce' that will collapse the enabled root ports into a linear map starting at zero. This option defaults to disabled as it can have a confusing effect on the system as the declared static devicetree may not match what is seen at runtime. This option is also forced on if the static devicetree disables port 0. When each root port is processed in the early enable stage it looks for a lower numbered root port that has been disabled and then swaps the two assigned function numbers. However the mapping register is write-once so it has to keep track of the proposed mapping changes until all ports have been processed before writing out the final map value. At this point it also updates the function numbers in the static device tree so they are consistent with the new layout. There are a few other closely related fixes in this change: 1) There is a power savings opportunity if an entire bank of ports (0-3 or 4-7) are disabled. This was checking the chipset revision to look for CougarPoint B1+ stepping and that was not passing on PantherPoint where this should always be applied. To fix this I added a function to determine the chipset type based on comparing the upper byte of the device ID. 2) Apply the same chipset type check fix to the IOBP programming. 3) There is another power savings opportunity to enable dynamic clock gating on shared PCIe resources which only applies to ports 0 and 4. However if 0 or 4 is disabled then the later check to enable this would fail as that device is already hidden. LUMPY current: 00:1c.0 PCI bridge: Intel Corporation Device 1c10 (rev b5) 00:1c.3 PCI bridge: Intel Corporation Device 1c16 (rev b5) 01:00.0 Network controller: Atheros Communications Inc. Device 0030 (rev 01) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B LUMPY with PCIe port coalesce enabled: 00:1c.0 PCI bridge: Intel Corporation Device 1c10 (rev b5) 00:1c.1 PCI bridge: Intel Corporation Device 1c16 (rev b5) 01:00.0 Network controller: Atheros Communications Inc. Device 0030 (rev 01) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B Change-Id: I828aa407fdc9c156c1c42eda8e2d893c0aa66eef Signed-off-by: Duncan Laurie <dlaurie(a)chromium.org> --- src/southbridge/intel/bd82x6x/chip.h | 3 + src/southbridge/intel/bd82x6x/pch.c | 196 ++++++++++++++++++++++++++++++++-- src/southbridge/intel/bd82x6x/pch.h | 21 +++- 3 files changed, 206 insertions(+), 14 deletions(-) diff --git a/src/southbridge/intel/bd82x6x/chip.h b/src/southbridge/intel/bd82x6x/chip.h index 2786d72..880244b 100644 --- a/src/southbridge/intel/bd82x6x/chip.h +++ b/src/southbridge/intel/bd82x6x/chip.h @@ -72,6 +72,9 @@ struct southbridge_intel_bd82x6x_config { uint32_t gen2_dec; uint32_t gen3_dec; uint32_t gen4_dec; + + /* Enable linear PCIe Root Port function numbers starting at zero */ + uint8_t pcie_port_coalesce; }; extern struct chip_operations southbridge_intel_bd82x6x_ops; diff --git a/src/southbridge/intel/bd82x6x/pch.c b/src/southbridge/intel/bd82x6x/pch.c index e83c2e6..5f440e6 100644 --- a/src/southbridge/intel/bd82x6x/pch.c +++ b/src/southbridge/intel/bd82x6x/pch.c @@ -2,6 +2,7 @@ * This file is part of the coreboot project. * * Copyright (C) 2008-2009 coresystems GmbH + * Copyright (C) 2012 The Chromium OS Authors. All rights reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as @@ -25,6 +26,7 @@ #include "pch.h" static int pch_revision_id = -1; +static int pch_type = -1; int pch_silicon_revision(void) { @@ -35,6 +37,40 @@ int pch_silicon_revision(void) return pch_revision_id; } +int pch_silicon_type(void) +{ + if (pch_type < 0) + pch_type = pci_read_config8( + dev_find_slot(0, PCI_DEVFN(0x1f, 0)), + PCI_DEVICE_ID + 1); + return pch_type; +} + +int pch_silicon_supported(int type, int rev) +{ + int cur_type = pch_silicon_type(); + int cur_rev = pch_silicon_revision(); + + switch (type) { + case PCH_TYPE_CPT: + /* CougarPoint minimum revision */ + if (cur_type == PCH_TYPE_CPT && cur_rev >= rev) + return 1; + /* PantherPoint any revision */ + if (cur_type == PCH_TYPE_PPT) + return 1; + break; + + case PCH_TYPE_PPT: + /* PantherPoint minimum revision */ + if (cur_type == PCH_TYPE_PPT && cur_rev >= rev) + return 1; + break; + } + + return 0; +} + /* Set bit in Function Disble register to hide this device */ static void pch_hide_devfn(unsigned devfn) { @@ -119,7 +155,7 @@ void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue) RCBA32(IOBPIRI) = address; /* READ OPCODE */ - if (pch_silicon_revision() >= PCH_STEP_B0) + if (pch_silicon_supported(PCH_TYPE_CPT, PCH_STEP_B0)) RCBA32(IOBPS) = IOBPS_RW_BX; else RCBA32(IOBPS) = IOBPS_READ_AX; @@ -142,7 +178,7 @@ void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue) data |= orvalue; /* WRITE OPCODE */ - if (pch_silicon_revision() >= PCH_STEP_B0) + if (pch_silicon_supported(PCH_TYPE_CPT, PCH_STEP_B0)) RCBA32(IOBPS) = IOBPS_RW_BX; else RCBA32(IOBPS) = IOBPS_WRITE_AX; @@ -184,15 +220,85 @@ static int pch_pcie_check_set_enabled(device_t dev) return 0; } -void pch_enable(device_t dev) +/* RPFN is a write-once register so keep a copy until it is written */ +static u32 new_rpfn; + +/* Swap function numbers assigned to two PCIe Root Ports */ +static void pch_pcie_function_swap(u8 old_fn, u8 new_fn) +{ + u32 old_rpfn = new_rpfn; + + printk(BIOS_DEBUG, "PCH: Remap PCIe function %d to %d\n", + old_fn, new_fn); + + new_rpfn &= ~(RPFN_FNMASK(old_fn) | RPFN_FNMASK(new_fn)); + + /* Old function set to new function and disabled */ + new_rpfn |= RPFN_FNSET(old_fn, RPFN_FNGET(old_rpfn, new_fn)); + new_rpfn |= RPFN_FNSET(new_fn, RPFN_FNGET(old_rpfn, old_fn)); +} + +/* Update devicetree with new Root Port function number assignment */ +static void pch_pcie_devicetree_update(void) +{ + device_t dev; + + /* Update the function numbers in the static devicetree */ + for (dev = all_devices; dev; dev = dev->next) { + u8 new_devfn; + + /* Only care about PCH PCIe root ports */ + if (PCI_SLOT(dev->path.pci.devfn) != + PCH_PCIE_DEV_SLOT) + continue; + + /* Determine the new devfn for this port */ + new_devfn = PCI_DEVFN(PCH_PCIE_DEV_SLOT, + RPFN_FNGET(new_rpfn, + PCI_FUNC(dev->path.pci.devfn))); + + if (dev->path.pci.devfn != new_devfn) { + printk(BIOS_DEBUG, + "PCH: PCIe map %02x.%1x -> %02x.%1x\n", + PCI_SLOT(dev->path.pci.devfn), + PCI_FUNC(dev->path.pci.devfn), + PCI_SLOT(new_devfn), PCI_FUNC(new_devfn)); + + dev->path.pci.devfn = new_devfn; + } + } +} + +/* Special handling for PCIe Root Port devices */ +static void pch_pcie_enable(device_t dev) { + struct southbridge_intel_bd82x6x_config *config = dev->chip_info; u32 reg32; - if (!dev->enabled) { - printk(BIOS_DEBUG, "%s: Disabling device\n", dev_path(dev)); + /* + * Save a copy of the Root Port Function Number map when + * starting to walk the list of PCIe Root Ports so it can + * be updated locally and written out when the last port + * has been processed. + */ + if (PCI_FUNC(dev->path.pci.devfn) == 0) { + new_rpfn = RCBA32(RPFN); /* - * PCIE Power Savings for stepping B1+: + * Enable Root Port coalescing if the first port is disabled + * or the other devices will not be enumerated by the OS. + */ + if (!dev->enabled) + config->pcie_port_coalesce = 1; + + if (config->pcie_port_coalesce) + printk(BIOS_INFO, + "PCH: PCIe Root Port coalescing is enabled\n"); + } + + if (!dev->enabled) { + /* + * PCIE Power Savings for PantherPoint and CougarPoint/B1+ * * If PCIe 0-3 disabled set Function 0 0xE2[0] = 1 * If PCIe 4-7 disabled set Function 4 0xE2[0] = 1 @@ -201,21 +307,89 @@ void pch_enable(device_t dev) * because the pcie driver enable() handler is not * called unless the device is enabled. */ - if (pch_silicon_revision() >= PCH_STEP_B1 && - PCI_SLOT(dev->path.pci.devfn) == PCH_PCIE_DEV_SLOT && - (PCI_FUNC(dev->path.pci.devfn) == 0 || + if ((PCI_FUNC(dev->path.pci.devfn) == 0 || PCI_FUNC(dev->path.pci.devfn) == 4)) { - if (!pch_pcie_check_set_enabled(dev)) { + /* Handle workaround for PPT and CPT/B1+ */ + if (pch_silicon_supported(PCH_TYPE_CPT, PCH_STEP_B1) && + !pch_pcie_check_set_enabled(dev)) { u8 reg8 = pci_read_config8(dev, 0xe2); reg8 |= 1; pci_write_config8(dev, 0xe2, reg8); } + + /* + * Enable Clock Gating for shared PCIe resources + * before disabling this particular port. + */ + pci_write_config8(dev, 0xe1, 0x3c); } /* Ensure memory, io, and bus master are all disabled */ reg32 = pci_read_config32(dev, PCI_COMMAND); reg32 &= ~(PCI_COMMAND_MASTER | - PCI_COMMAND_MEMORY | PCI_COMMAND_IO ); + PCI_COMMAND_MEMORY | PCI_COMMAND_IO); + pci_write_config32(dev, PCI_COMMAND, reg32); + + /* Do not claim downstream transactions for PCIe ports */ + new_rpfn |= RPFN_HIDE(PCI_FUNC(dev->path.pci.devfn)); + + /* Hide this device if possible */ + pch_hide_devfn(dev->path.pci.devfn); + } else { + int fn; + + /* + * Check if there is a lower disabled port to swap with this + * port in order to maintain linear order starting at zero. + */ + if (config->pcie_port_coalesce) { + for (fn=0; fn < PCI_FUNC(dev->path.pci.devfn); fn++) { + if (!(new_rpfn & RPFN_HIDE(fn))) + continue; + + /* Swap places with this function */ + pch_pcie_function_swap( + PCI_FUNC(dev->path.pci.devfn), fn); + break; + } + } + + /* Enable SERR */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 |= PCI_COMMAND_SERR; + pci_write_config32(dev, PCI_COMMAND, reg32); + } + + /* + * When processing the last PCIe root port we can now + * update the Root Port Function Number and Hide register. + */ + if (PCI_FUNC(dev->path.pci.devfn) == 7) { + printk(BIOS_SPEW, "PCH: RPFN 0x%08x -> 0x%08x\n", + RCBA32(RPFN), new_rpfn); + RCBA32(RPFN) = new_rpfn; + + /* Update static devictree with new function numbers */ + if (config->pcie_port_coalesce) + pch_pcie_devicetree_update(); + } +} + +void pch_enable(device_t dev) +{ + u32 reg32; + + /* PCH PCIe Root Ports get special handling */ + if (PCI_SLOT(dev->path.pci.devfn) == PCH_PCIE_DEV_SLOT) + return pch_pcie_enable(dev); + + if (!dev->enabled) { + printk(BIOS_DEBUG, "%s: Disabling device\n", dev_path(dev)); + + /* Ensure memory, io, and bus master are all disabled */ + reg32 = pci_read_config32(dev, PCI_COMMAND); + reg32 &= ~(PCI_COMMAND_MASTER | + PCI_COMMAND_MEMORY | PCI_COMMAND_IO); pci_write_config32(dev, PCI_COMMAND, reg32); /* Hide this device if possible */ diff --git a/src/southbridge/intel/bd82x6x/pch.h b/src/southbridge/intel/bd82x6x/pch.h index 80b09e2..7b646f3 100644 --- a/src/southbridge/intel/bd82x6x/pch.h +++ b/src/southbridge/intel/bd82x6x/pch.h @@ -2,7 +2,7 @@ * This file is part of the coreboot project. * * Copyright (C) 2008-2009 coresystems GmbH - * Copyright (C) 2011 Google Inc. + * Copyright (C) 2012 The Chromium OS Authors. All rights reserved. * * 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 @@ -21,6 +21,10 @@ #ifndef SOUTHBRIDGE_INTEL_BD82X6X_PCH_H #define SOUTHBRIDGE_INTEL_BD82X6X_PCH_H +/* PCH types */ +#define PCH_TYPE_CPT 0x1c /* CougarPoint */ +#define PCH_TYPE_PPT 0x1e /* IvyBridge */ + /* PCH stepping values for LPC device */ #define PCH_STEP_A0 0 #define PCH_STEP_A1 1 @@ -57,6 +61,8 @@ void intel_pch_finalize_smm(void); #if !defined(__PRE_RAM__) && !defined(__SMM__) #include "chip.h" int pch_silicon_revision(void); +int pch_silicon_type(void); +int pch_silicon_supported(int type, int rev); void pch_enable(device_t dev); void pch_iobp_update(u32 address, u32 andvalue, u32 orvalue); #else @@ -270,8 +276,17 @@ int smbus_read_byte(unsigned device, unsigned address); #define RP6D 0x0180 /* 32bit */ #define RP6BA 0x0188 /* 64bit */ -#define RPC 0x0224 /* 32bit */ -#define RPFN 0x0238 /* 32bit */ +#define RPC 0x0400 /* 32bit */ +#define RPFN 0x0404 /* 32bit */ + +/* Root Port configuratinon space hide */ +#define RPFN_HIDE(port) (1 << (((port) * 4) + 3)) +/* Get the function number assigned to a Root Port */ +#define RPFN_FNGET(reg,port) (((reg) >> ((port) * 4)) & 7) +/* Set the function number for a Root Port */ +#define RPFN_FNSET(port,func) (((func) & 7) << ((port) * 4)) +/* Root Port function number mask */ +#define RPFN_FNMASK(port) (7 << ((port) * 4)) #define TRSR 0x1e00 /* 8bit */ #define TRCR 0x1e10 /* 64bit */

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coreboot April 2012