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2020-06-11io: endian annotations and fixNicholas Piggin1-24/+24
Annotate io accessor pointer types with endian. sparse caught a bug in memcpy_from_ci, which is fixed. From: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
2020-03-12Re-license IBM written files as Apache 2.0 OR GPLv2+Stewart Smith1-1/+1
SPDX makes it a simpler diff. I have audited the commit history of each file to ensure that they are exclusively authored by IBM and thus we have the right to relicense. The motivation behind this is twofold: 1) We want to enable experiments with coreboot, which is GPLv2 licensed 2) An upcoming firmware component wants to incorporate code from skiboot and code from the Linux kernel, which is GPLv2 licensed. I have gone through the IBM internal way of gaining approval for this. The following files are not exclusively authored by IBM, so are *not* included in this update (I will be seeking approval from contributors): core/direct-controls.c core/flash.c core/pcie-slot.c external/common/arch_flash_unknown.c external/common/rules.mk external/gard/Makefile external/gard/rules.mk external/opal-prd/Makefile external/pflash/Makefile external/xscom-utils/Makefile hdata/vpd.c hw/dts.c hw/ipmi/ipmi-watchdog.c hw/phb4.c include/cpu.h include/phb4.h include/platform.h libflash/libffs.c libstb/mbedtls/sha512.c libstb/mbedtls/sha512.h platforms/astbmc/barreleye.c platforms/astbmc/garrison.c platforms/astbmc/mihawk.c platforms/astbmc/nicole.c platforms/astbmc/p8dnu.c platforms/astbmc/p8dtu.c platforms/astbmc/p9dsu.c platforms/astbmc/vesnin.c platforms/rhesus/ec/config.h platforms/rhesus/ec/gpio.h platforms/rhesus/gpio.c platforms/rhesus/rhesus.c platforms/astbmc/talos.c platforms/astbmc/romulus.c Signed-off-by: Stewart Smith <stewart@linux.ibm.com> [oliver: fixed up the drift] Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
2019-12-16io: endian conversions for io accessorsNicholas Piggin1-15/+64
This requires a small change to flash drivers which assumed 4-byte LPC reads would not change endian. _raw accessors could be added if this becomes a signifcant pattern, but for now this hack works. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
2019-07-26SPDX-ify all skiboot codeStewart Smith1-15/+2
Use Software Package Data Exchange (SPDX) to indicate license for each file that is unique to skiboot. At the same time, ensure the (C) who and years are correct. See https://spdx.org/ Signed-off-by: Stewart Smith <stewart@linux.ibm.com> [oliver: Added a few missing files] Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
2017-12-11io: Add load_wait() helperBenjamin Herrenschmidt1-0/+8
This uses the standard form twi/isync pair to ensure a load is consumed by the core before continuing. This can be necessary under some circumstances for example when having the following sequence: - Store reg A - Load reg A (ensure above store pushed out) - delay loop - Store reg A IE, a mandatory delay between 2 stores. In theory the first store is only guaranteed to rach the device after the load from the same location has completed. However the processor will start executing the delay loop without waiting for the return value from the load. This construct enforces that the delay loop isn't executed until the load value has been returned. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
2014-07-02Initial commit of Open Source releaseBenjamin Herrenschmidt1-0/+175
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>