| Message ID | 1457759256-23432-44-git-send-email-sjg@chromium.org |
|---|---|
| State | Accepted |
| Delegated to: | Bin Meng |
| Headers | show |
On Sat, Mar 12, 2016 at 1:07 PM, Simon Glass <sjg@chromium.org> wrote: > Provide a way to determine the HSIO (high-speed I/O) version supported by > the Intel Management Engine (ME) implementation on the platform. > > Signed-off-by: Simon Glass <sjg@chromium.org> > --- > > Changes in v2: None > > arch/x86/cpu/broadwell/Makefile | 1 + > arch/x86/cpu/broadwell/me.c | 57 +++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 58 insertions(+) > create mode 100644 arch/x86/cpu/broadwell/me.c > Acked-by: Bin Meng <bmeng.cn@gmail.com>
On Mon, Mar 14, 2016 at 2:35 PM, Bin Meng <bmeng.cn@gmail.com> wrote: > On Sat, Mar 12, 2016 at 1:07 PM, Simon Glass <sjg@chromium.org> wrote: >> Provide a way to determine the HSIO (high-speed I/O) version supported by >> the Intel Management Engine (ME) implementation on the platform. >> >> Signed-off-by: Simon Glass <sjg@chromium.org> >> --- >> >> Changes in v2: None >> >> arch/x86/cpu/broadwell/Makefile | 1 + >> arch/x86/cpu/broadwell/me.c | 57 +++++++++++++++++++++++++++++++++++++++++ >> 2 files changed, 58 insertions(+) >> create mode 100644 arch/x86/cpu/broadwell/me.c >> > > Acked-by: Bin Meng <bmeng.cn@gmail.com> applied to u-boot-x86/next, thanks!
diff --git a/arch/x86/cpu/broadwell/Makefile b/arch/x86/cpu/broadwell/Makefile index 012798f..7edb6f6 100644 --- a/arch/x86/cpu/broadwell/Makefile +++ b/arch/x86/cpu/broadwell/Makefile @@ -7,6 +7,7 @@ obj-y += cpu.o obj-y += iobp.o obj-y += lpc.o +obj-y += me.o obj-y += northbridge.o obj-y += pch.o obj-y += pinctrl_broadwell.o diff --git a/arch/x86/cpu/broadwell/me.c b/arch/x86/cpu/broadwell/me.c new file mode 100644 index 0000000..e03b87c --- /dev/null +++ b/arch/x86/cpu/broadwell/me.c @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2016 Google, Inc + * + * SPDX-License-Identifier: GPL-2.0 + * + * Based on code from coreboot src/soc/intel/broadwell/me_status.c + */ + +#include <common.h> +#include <errno.h> +#include <asm/arch/me.h> + +static inline void me_read_dword_ptr(struct udevice *dev, void *ptr, int offset) +{ + u32 dword; + + dm_pci_read_config32(dev, offset, &dword); + memcpy(ptr, &dword, sizeof(dword)); +} + +int intel_me_hsio_version(struct udevice *dev, uint16_t *versionp, + uint16_t *checksump) +{ + int count; + u32 hsiover; + struct me_hfs hfs; + + /* Query for HSIO version, overloads H_GS and HFS */ + dm_pci_write_config32(dev, PCI_ME_H_GS, + ME_HSIO_MESSAGE | ME_HSIO_CMD_GETHSIOVER); + + /* Must wait for ME acknowledgement */ + for (count = ME_RETRY; count > 0; --count) { + me_read_dword_ptr(dev, &hfs, PCI_ME_HFS); + if (hfs.bios_msg_ack) + break; + udelay(ME_DELAY); + } + if (!count) { + debug("ERROR: ME failed to respond\n"); + return -ETIMEDOUT; + } + + /* HSIO version should be in HFS_5 */ + dm_pci_read_config32(dev, PCI_ME_HFS5, &hsiover); + *versionp = hsiover >> 16; + *checksump = hsiover & 0xffff; + + debug("ME: HSIO Version : %d (CRC 0x%04x)\n", + *versionp, *checksump); + + /* Reset registers to normal behavior */ + dm_pci_write_config32(dev, PCI_ME_H_GS, + ME_HSIO_MESSAGE | ME_HSIO_CMD_GETHSIOVER); + + return 0; +}
Provide a way to determine the HSIO (high-speed I/O) version supported by the Intel Management Engine (ME) implementation on the platform. Signed-off-by: Simon Glass <sjg@chromium.org> --- Changes in v2: None arch/x86/cpu/broadwell/Makefile | 1 + arch/x86/cpu/broadwell/me.c | 57 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+) create mode 100644 arch/x86/cpu/broadwell/me.c