[U-Boot] [PATCH v3 0/5] x86: Add CPU uclass and multi-core support for Minnowboard MAX

[Simon Glass]

Hi Bin,

On 29 Apr 2015 10:26 pm, "Simon Glass" <sjg at chromium.org> wrote:
>
> This series adds a new CPU uclass which is intended to be useful on any
> architecture. So far it has a very simple interface and a command to show
> CPU details.
>
> This series also introduces multi-core init for x86. It is implemented and
> enabled on Minnowboard MAX, a single/dual-core Atom board. The CPU uclass
is
> implemented for x86 and the Simple Firmware Interface provides these
details
> to the kernel, since ACPI is not yet available.
>
> With these changes Minnowboard MAX can boot into Linux with both cores
> enabled.
>
> This series is available at u-boot-x86 branch 'cpu-working'.
>
> Changes in v3:
> - Rename CONFIG_STACK_SIZE to CONFIG_AP_STACK_SIZE
> - Remove sipi_vector_location and sipi_vector_location_size variables
> - Remove annoying /* 1ms */ comments
> - Rename sipi.S to sipi_vector.S
> - Correct 'ap_start32' to 'ap_start'
> - Use macros for cr0 bit fields
> - Correct style in a multi-line comment
> - Use UCODE_HEADER_LEN instead of 48
> - Remove unnecessary underscores in MP_FR_BLOCK_APS and MP_FR_NOBLOCK_APS
> - Use 'cpu number' instead of 'coreboot cpu number'
> - Remove a stray blank line in sipi.h
> - Enhance comment for @microcode_lock
> - Rename SMM_DEFAULT_BASE/SIZE to AP_DEFAULT_BASE/SIZE and drop smm.h
> - Use data32 instead of our own 'o32'
> - Move NUM_FIXED_MTRRS to mtrr.h
> - Avoid using asmlinkage on ap_init()
> - Add msr_clrbits_64() too
> - Collect all new MSRs into msr-index.h
> - Spell 'BayTrail' like so
> - Make set_max_freq() static

I did not sort out the secondary CPU init in this series. I will take a
look.

>
> Changes in v2:
> - Correct 'I2C uclass' typo
> - Add blank line in x86_cpu_get_desc()
>
> Simon Glass (5):
>   x86: Add multi-processor init
>   x86: Add functions to set and clear bits on MSRs
>   x86: Allow CPUs to be set up after relocation
>   x86: Add a CPU driver for baytrail
>   x86: Enable multi-core init for Minnowboard MAX
>
>  arch/x86/Kconfig                                  |  30 ++
>  arch/x86/cpu/Makefile                             |   2 +
>  arch/x86/cpu/baytrail/Makefile                    |   1 +
>  arch/x86/cpu/baytrail/cpu.c                       | 205 +++++++++
>  arch/x86/cpu/cpu.c                                |  38 ++
>  arch/x86/cpu/ivybridge/car.S                      |   1 +
>  arch/x86/cpu/ivybridge/model_206ax.c              |   4 +-
>  arch/x86/cpu/mp_init.c                            | 496
++++++++++++++++++++++
>  arch/x86/cpu/sipi_vector.S                        | 216 ++++++++++
>  arch/x86/dts/minnowmax.dts                        |  20 +
>  arch/x86/include/asm/arch-ivybridge/microcode.h   |   3 -
>  arch/x86/include/asm/arch-ivybridge/model_206ax.h |   2 -
>  arch/x86/include/asm/cpu.h                        |  14 +
>  arch/x86/include/asm/mp.h                         |  94 ++++
>  arch/x86/include/asm/msr-index.h                  |  22 +-
>  arch/x86/include/asm/msr.h                        |  28 ++
>  arch/x86/include/asm/mtrr.h                       |   6 +-
>  arch/x86/include/asm/processor.h                  |   3 +
>  arch/x86/include/asm/sipi.h                       |  86 ++++
>  arch/x86/include/asm/turbo.h                      |   3 -
>  arch/x86/include/asm/u-boot-x86.h                 |   2 +
>  common/board_r.c                                  |   2 +-
>  configs/minnowmax_defconfig                       |   4 +
>  23 files changed, 1268 insertions(+), 14 deletions(-)
>  create mode 100644 arch/x86/cpu/baytrail/cpu.c
>  create mode 100644 arch/x86/cpu/mp_init.c
>  create mode 100644 arch/x86/cpu/sipi_vector.S
>  create mode 100644 arch/x86/include/asm/mp.h
>  create mode 100644 arch/x86/include/asm/sipi.h
>
> --
> 2.2.0.rc0.207.ga3a616c
>

Regards,
Simon