[U-Boot] [PATCH v3 1/8] x86: Add new slimbootloader CPU type
Park, Aiden
aiden.park at intel.com
Sun Jul 14 21:15:47 UTC 2019
Hi Bin,
> -----Original Message-----
> From: Bin Meng [mailto:bmeng.cn at gmail.com]
> Sent: Sunday, July 14, 2019 1:49 AM
> To: Park, Aiden <aiden.park at intel.com>
> Cc: U-Boot Mailing List <u-boot at lists.denx.de>; Simon Glass
> <sjg at chromium.org>
> Subject: Re: [PATCH v3 1/8] x86: Add new slimbootloader CPU type
>
> On Wed, Jul 10, 2019 at 3:02 AM Park, Aiden <aiden.park at intel.com> wrote:
> >
> > This slimbootloader cpu type is to enable u-boot as a payload which
> > runs on top of Slim Bootloader(https://github.com/slimbootloader).
> > The Slim Bootloader is designed with multi-stage architecture for the
> > execution from reset vector to OS booting, and supports qemu,
> > Apollolake, Whiskeylake and Coffeelake platforms consuming Intel FSP
> > (https://github.com/IntelFsp) for silicon initialization including CAR
> > and memory initialization.
> > The Slim Bootloader generates new HOB(Hand Off Block) which are serial
> > port info, memory map info, performance data info and so on, and
> > passes it to a Payload. U-boot as a payload will use these HOB
>
> nits: U-Boot
Let me change it.
>
> > information for basic initialization such as serial console.
> >
> > As an initial commit,
> > - Add CONFIG_SYS_SLIMBOOTLOADER to enable slimbootloader CPU type
> > - Add new arch/x86/cpu/slimbootloader directory with minimum codes
> > - Get hob_list pointer from Slim Bootloader
> >
> > Signed-off-by: Aiden Park <aiden.park at intel.com>
> > ---
> >
> > Changes in v3:
> > * Add a brief description about Slim Bootloader
> > * Enable USB_KEYBOARD, E1000 and RTL8169 by default
> > * Fix comment from code review
> >
> > arch/x86/Kconfig | 1 +
> > arch/x86/cpu/Makefile | 1 +
> > arch/x86/cpu/slimbootloader/Kconfig | 26 +++++++++++
> > arch/x86/cpu/slimbootloader/Makefile | 5 +++
> > arch/x86/cpu/slimbootloader/car.S | 43 +++++++++++++++++++
> > arch/x86/cpu/slimbootloader/slimbootloader.c | 21 +++++++++
> > .../asm/arch-slimbootloader/slimbootloader.h | 11 +++++
> > arch/x86/include/asm/global_data.h | 2 +-
> > arch/x86/lib/asm-offsets.c | 2 +-
> > 9 files changed, 110 insertions(+), 2 deletions(-) create mode
> > 100644 arch/x86/cpu/slimbootloader/Kconfig
> > create mode 100644 arch/x86/cpu/slimbootloader/Makefile
> > create mode 100644 arch/x86/cpu/slimbootloader/car.S create mode
> > 100644 arch/x86/cpu/slimbootloader/slimbootloader.c
> > create mode 100644
> > arch/x86/include/asm/arch-slimbootloader/slimbootloader.h
> >
> > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index
> > 70f939869a..27b7b767b9 100644
> > --- a/arch/x86/Kconfig
> > +++ b/arch/x86/Kconfig
> > @@ -115,6 +115,7 @@ source "arch/x86/cpu/efi/Kconfig"
> > source "arch/x86/cpu/qemu/Kconfig"
> > source "arch/x86/cpu/quark/Kconfig"
> > source "arch/x86/cpu/queensbay/Kconfig"
> > +source "arch/x86/cpu/slimbootloader/Kconfig"
> > source "arch/x86/cpu/tangier/Kconfig"
> >
> > # architecture-specific options below diff --git
> > a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile index
> > 85fd5e616e..3f1f62da2b 100644
> > --- a/arch/x86/cpu/Makefile
> > +++ b/arch/x86/cpu/Makefile
> > @@ -42,6 +42,7 @@ obj-$(CONFIG_INTEL_BAYTRAIL) += baytrail/
> > obj-$(CONFIG_INTEL_BRASWELL) += braswell/
> > obj-$(CONFIG_INTEL_BROADWELL) += broadwell/
> > obj-$(CONFIG_SYS_COREBOOT) += coreboot/
> > +obj-$(CONFIG_SYS_SLIMBOOTLOADER) += slimbootloader/
> > obj-$(CONFIG_EFI) += efi/
> > obj-$(CONFIG_QEMU) += qemu/
> > obj-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ivybridge/ diff --git
> > a/arch/x86/cpu/slimbootloader/Kconfig
> > b/arch/x86/cpu/slimbootloader/Kconfig
> > new file mode 100644
> > index 0000000000..439e4b1e2c
> > --- /dev/null
> > +++ b/arch/x86/cpu/slimbootloader/Kconfig
> > @@ -0,0 +1,26 @@
> > +# SPDX-License-Identifier: GPL-2.0+
> > +#
> > +# Copyright (C) 2019 Intel Corporation <www.intel.com>
> > +
> > +if TARGET_SLIMBOOTLOADER
> > +
> > +config SYS_SLIMBOOTLOADER
> > + bool
> > + default y
> > + imply SYS_NS16550
> > + imply AHCI_PCI
> > + imply SCSI
> > + imply SCSI_AHCI
> > + imply MMC
> > + imply MMC_PCI
> > + imply MMC_SDHCI
> > + imply MMC_SDHCI_SDMA
> > + imply USB
> > + imply USB_EHCI_HCD
> > + imply USB_XHCI_HCD
> > + imply USB_STORAGE
> > + imply USB_KEYBOARD
> > + imply E1000
> > + imply RTL8169
> > +
> > +endif
> > diff --git a/arch/x86/cpu/slimbootloader/Makefile
> > b/arch/x86/cpu/slimbootloader/Makefile
> > new file mode 100644
> > index 0000000000..627a721e8c
> > --- /dev/null
> > +++ b/arch/x86/cpu/slimbootloader/Makefile
> > @@ -0,0 +1,5 @@
> > +# SPDX-License-Identifier: GPL-2.0+
> > +#
> > +# Copyright (C) 2019 Intel Corporation <www.intel.com>
> > +
> > +obj-y += car.o slimbootloader.o
> > diff --git a/arch/x86/cpu/slimbootloader/car.S
> > b/arch/x86/cpu/slimbootloader/car.S
> > new file mode 100644
> > index 0000000000..63c5c28b33
> > --- /dev/null
> > +++ b/arch/x86/cpu/slimbootloader/car.S
> > @@ -0,0 +1,43 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */
> > +/*
> > + * Copyright (C) 2019 Intel Corporation <www.intel.com> */
> > +
> > +#include <generated/asm-offsets.h>
> > +
> > +.section .text
> > +
> > +.globl slimbootloader_start
> > +slimbootloader_start:
> > + /* Get hob pointer parameter from previous stage's stack */
> > + mov 0x4(%esp), %esi
> > +
> > + /* Set up global data */
> > + mov %esp, %eax
> > + call board_init_f_alloc_reserve
> > + mov %eax, %esp
> > + call board_init_f_init_reserve
> > +
> > +#ifdef CONFIG_DEBUG_UART
> > + call debug_uart_init
> > +#endif
> > +
> > + /* Get address of global_data */
> > + mov %fs:0, %edx
> > + movl %esi, GD_HOB_LIST(%edx)
> > +
> > + /* Enter u-boot with 0 bootflag */
> > + xorl %eax, %eax
> > + call board_init_f
> > +
> > +.globl car_init
> > +car_init:
> > + /*
> > + * CAR init/teardown and memory init have already been done
> > + * in Slim Bootloader stages. Therefore, let's use this car_init as
> > + * very first entry point of slimbootloader_start.
> > + */
> > + jmp slimbootloader_start
> > +
> > + /* DO NOT REACH HERE */
> > + jmp .
>
> Why don't we use the generic arch/x86/cpu/start.S and jmp car_init_ret here?
The intention was to avoid modifying arch/x86/cpu/start.S.
Let me use the start.S with CONFIG_SYS_SLIMBOOTLOADER condition. Thanks.
>
> [snip]
>
> Regards,
> Bin
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