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2018-02-28build: use thin archives rather than incremental linkingNicholas Piggin1-1/+1
This changes to build system to use thin archives rather than incremental linking for built-in.o, similar to recent change to Linux. built-in.o is renamed to built-in.a, and is created as a thin archive with no index, for speed and size. All built-in.a are aggregated into a skiboot.tmp.a which is a thin archive built with an index, making it suitable or linking. This is input into the final link. The advantags of build size and linker code placement flexibility are not as great with skiboot as a bigger project like Linux, but it's a conceptually better way to build, and is more compatible with link time optimisation in toolchains which might be interesting for skiboot particularly for size reductions. Size of build tree before this patch is 34.4MB, afterwards 23.1MB. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-03-07System reset IPI facility and Mambo implementationNicholas Piggin1-0/+52
Add an opal call OPAL_SIGNAL_SYSTEM_RESET which allows system reset exceptions to be raised on other CPUs and act as an NMI IPI. There is an initial simple Mambo implementation, but allowances are made for a more complex hardware implementation. This API is based on the POWER8 implementation from Alistair Popple. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [stewart@linux.vnet.ibm.com: minor RST fix] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-01-10mambo: add mprintf()Oliver O'Halloran1-0/+19
mprintf() is printf(), but it goes straight to the mambo console. This allows it to be independent of Skiboot's actual console infrastructure so it can be used for debugging the console drivers and for debugging code that runs before the console is setup. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-01-04console: remove force_dummy_console()Oliver O'Halloran1-1/+0
force_dummy_console() was only ever used to ensure the dummy console would be initialised when the platform did not setup it's usual console. The new console init path will uses the dummy console by default so this is now unnecessary. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-01-04console: move mambo con_ops into the platformOliver O'Halloran3-11/+69
There's no need for this to be in the skiboot core console code. Also do a few cleanups while we're shovling code around. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2017-01-04mambo: move callouts into separate header fileOliver O'Halloran2-39/+61
This just moves the mambo callout handlers into a private header file so we don't have to continue junking up the main platform file. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-12-13mambo: fake NVRAM supportChris Smart1-17/+3
This re-configures the Mambo platform to use the new fake NVRAM introduced by Jack Miller <jack@codezen.org> in commit: mambo: Add Fake NVRAM driver An existing NVRAM file can be loaded by pointing SKIBOOT_NVRAM environment variable to the file when running Mambo. If no NVRAM file is provided, the default is set to 256Kb and will be formatted automatically by Skiboot on boot, e.g.: [ 0.000975501,5 ] NVRAM: Size is 256 KB [ 0.002292860,3 ] NVRAM: Partition at offset 0x0 has incorrect 0 length [ 0.002298792,3 ] NVRAM: Re-initializing (size: 0x00040000) This has been tested in Mambo, on bare metal Linux, as well as OpenPower BMC machines. Signed-off-by: Chris Smart <chris@distroguy.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-11-02mambo: Make call thru command defines consistentMichael Neuling1-9/+9
No functional change Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-11-02mambo: Convert RTC read from asm to CMichael Neuling1-27/+26
Also moves some code around to ensure things are defined before they are used. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-11-02mambo: Convert console read/write from asm to CMichael Neuling1-0/+12
Also changes the function name: mambo_read/write() -> mambo_console_read/write() Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-11-02mambo: Convert sim exit from asm to CMichael Neuling1-2/+3
Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-11-02mambo: Add callthru0()Michael Neuling1-0/+7
To be used for rtc and simstop calls Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-11-02mambo: Make callthru functions return 64 bitsMichael Neuling1-5/+6
Make callthru functions return 64 bits so we can return larger numbers. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-11-02platforms/mambo: Support large unaligned readsCyril Bur1-9/+16
Recent changes to the skiboot resource loading code means that reads for BOOTKERNEL and ROOTFS partitions will be exactly the number of bytes required and no longer the (inaccurate) partition total size which happened to be block size aligned. Error when booting in mambo: 1140078: (1140078): [ 0.001132323,3] FLASH: failed to read content size 14252376 BOOTKERNEL partition, rc -1 Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com> [initial review and changes by Mikey Neuling] Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-10-17Fast reboot for P8Benjamin Herrenschmidt1-0/+10
This is an experimental patch that implements "Fast reboot" on P8 machines. The basic idea is that when the OS calls OPAL reboot, we gather all the threads in the system using a combination of patching the reset vector and soft-resetting them, then cleanup a few bits of hardware (we do re-probe PCIe for example), and reload & restart the bootloader. For Trusted Boot, this means we *add* measurements to the TPM, so you will get *different* PCR values as compared to a full IPL. This makes sense as if you want to be sure you are running something known then, well, do a full IPL as soft reset should never be trusted to clear any malicious code. This is very experimental and needs a lot of testing and also auditing code for other bits of HW that might need to be cleaned up. BenH TODO: I also need to check if we are properly PERST'ing PCI devices. This is partially based on old code I had to do that on P7. I only support it on P8 though as there are issues with the PSI interrupts on P7 that cannot be reliably solved. Even though this should be considered somewhat experimental, we've had a lot of success on a variety of machines. Dozens/hundreds of reboots across Tuleta, Garrison and Habanero. Currently, we've hidden it behind a NVRAM config option, which *is* liable to change in the future (to ensure that only those who know what they're doing enable it) You can enable the experimental support via nvram option: nvram -p ibm,skiboot --update-config experimental-fast-reset=feeling-lucky Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [stewart@linux.vnet.ibm.com: hide behind nvram option, include Mambo fixes from Mikey] Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-08-25flash: Rework error paths and messages for multiple flash controllersMichael Neuling1-1/+1
The current flash code was written with only one flash chip, which is a system_flash (ie. the PNOR image), in mind. Now that we have mambo bogusdisk flash, we can have many flash chips. This is resulting in some confusing output messages. This reworks some of the error paths and warnings to make this more coherent when we have multiple flash chips. We assume everything can be a system flash, so I've removed the is_system_flash parameter from flash_register(). We'll use the first system flash we find and warn if we find another since discovery order is not a guaranteed API. Signed-off-by: Michael Neuling <mikey@neuling.org> Acked-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-08-02flash: Make size 64 bit safeMichael Neuling1-6/+6
This makes the size of flash 64 bit safe so that we can have flash devices greater than 4GB. This is especially useful for mambo disks passed through to Linux. Fortunately the device tree interface and the linux device driver are 64bit safe so no changes are required there. Userspace gard and flash tools are also updated to ensure "make check" still passes. Signed-off-by: Michael Neuling <mikey@neuling.org> Reviewed-by: Cyril Bur <cyrilbur@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-22platform/mambo: Add a heartbeat timeChris Smart1-0/+10
The console is very slow when using Skiboot with Mambo. This adds a heartbeat timer as a platform quirk so that the console is refresh more quickly. This results in Skiboot doing the right thing without requiring custom settings in skiboot.tcl files. Signed-off-by: Chris Smart <chris@distroguy.com> Acked-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-11mambo: Add NULL checks and error messagesCyril Bur1-0/+6
While it extremely unlikely that these paths will ever by triggered the error message could be useful to help diagnose a broken system. This patch also fixes coverity issue 127700 Signed-off-by: Cyril Bur <cyril.bur@au1.ibm.com> Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-07-05mambo: Flash driver using bogus diskMichael Neuling1-0/+159
Implement a flash driver using mambo bogus disk. Works as a system flash (ie palmetto.pnor) or with disk images (via Linux mtdblock). Linux MTD needs this patch to perform at a resonable speed: https://lists.ozlabs.org/pipermail/linuxppc-dev/2016-July/145202.html Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2016-03-07mambo: Add terminate callbackMichael Neuling1-0/+9
Add terminate callback to mambo platform so that the simulator exits. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2015-05-27Add fake nvram for Mambo platformStewart Smith1-0/+17
Increases boot-code-coverage (for Mambo): Lines: 2043 to 2168 (8.3% to 8.8%) Functions: 283 to 298 (14.7% to 15.4%) Branches: 792 to 816 (6.4% to 6.5%) Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2015-05-27Add Mambo platformStewart Smith2-0/+87
By adding an explicit mambo platform we can do tricks like a fake NVRAM, actually get RTC from mambo and generally be a bit better in a simulator Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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