[U-Boot] [RFC PATCH 4/6] x86: Add basic Intel Quark processor support
Simon Glass
sjg at chromium.org
Wed Jan 28 19:05:03 CET 2015
Hi Bin,
On 28 January 2015 at 07:20, Bin Meng <bmeng.cn at gmail.com> wrote:
> Add minimum codes to support Intel Quark SoC. DRAM initialization
> is not ready yet so a hardcoded gd->ram_size is assigned.
>
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
> ---
>
> arch/x86/cpu/quark/Kconfig | 63 ++++++++++++++++++++++++++++++
> arch/x86/cpu/quark/Makefile | 8 ++++
> arch/x86/cpu/quark/dram.c | 39 +++++++++++++++++++
> arch/x86/cpu/quark/pci.c | 70 ++++++++++++++++++++++++++++++++++
> arch/x86/cpu/quark/quark.c | 44 +++++++++++++++++++++
> arch/x86/include/asm/arch-quark/gpio.h | 13 +++++++
> 6 files changed, 237 insertions(+)
> create mode 100644 arch/x86/cpu/quark/Kconfig
> create mode 100644 arch/x86/cpu/quark/Makefile
> create mode 100644 arch/x86/cpu/quark/dram.c
> create mode 100644 arch/x86/cpu/quark/pci.c
> create mode 100644 arch/x86/cpu/quark/quark.c
> create mode 100644 arch/x86/include/asm/arch-quark/gpio.h
>
> diff --git a/arch/x86/cpu/quark/Kconfig b/arch/x86/cpu/quark/Kconfig
> new file mode 100644
> index 0000000..a71cc6c
> --- /dev/null
> +++ b/arch/x86/cpu/quark/Kconfig
> @@ -0,0 +1,63 @@
> +#
> +# Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
> +#
> +# SPDX-License-Identifier: GPL-2.0+
> +#
> +
> +config INTEL_QUARK
> + bool
> + select HAVE_RMU
> +
> +if INTEL_QUARK
> +
> +config HAVE_RMU
> + bool "Add a Remote Management Unit (RMU) binary"
> + help
> + Select this option to add a Remote Management Unit (RMU) binary
> + to the resulting U-Boot image. It is a data block (up to 64K) of
> + machine specific code which must be put in the flash for the RMU
machine-specific
> + within the Quark SoC processor to access when powered up before
> + system BIOS is executed.
So does this happen before the reset vector?!
> +
> +config RMU_FILE
> + string "Remote Management Unit (RMU) binary filename"
> + depends on HAVE_RMU
> + default "rmu.bin"
> + help
> + The filename of the file to use as Remote Management Unit (RMU)
> + binary in the board directory.
> +
> +config RMU_ADDR
> + hex "Remote Management Unit (RMU) binary location"
> + depends on HAVE_RMU
> + default 0xfff00000
> + help
> + The location of the RMU binary is determined by a strap. It must be
> + put in flash at a location matching the strap-determined base address.
> +
> + The default base address of 0xfff00000 indicates that the binary must
> + be located at offset 0 from the beginning of a 1MB flash device.
> +
> +config HAVE_CMC
> + bool
> + default HAVE_RMU
> +
> +config CMC_FILE
> + string
> + depends on HAVE_CMC
> + default RMU_FILE
> +
> +config CMC_ADDR
> + hex
> + depends on HAVE_CMC
> + default RMU_ADDR
> +
> +config SYS_CAR_ADDR
> + hex
> + default 0x80000000
> +
> +config SYS_CAR_SIZE
> + hex
> + default 0x8000
> +
> +endif
> diff --git a/arch/x86/cpu/quark/Makefile b/arch/x86/cpu/quark/Makefile
> new file mode 100644
> index 0000000..168c1e6
> --- /dev/null
> +++ b/arch/x86/cpu/quark/Makefile
> @@ -0,0 +1,8 @@
> +#
> +# Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
> +#
> +# SPDX-License-Identifier: GPL-2.0+
> +#
> +
> +obj-y += car.o dram.o msg_port.o quark.o
> +obj-$(CONFIG_PCI) += pci.o
> diff --git a/arch/x86/cpu/quark/dram.c b/arch/x86/cpu/quark/dram.c
> new file mode 100644
> index 0000000..fbdc3cd
> --- /dev/null
> +++ b/arch/x86/cpu/quark/dram.c
> @@ -0,0 +1,39 @@
> +/*
> + * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <asm/post.h>
> +#include <asm/arch/quark.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +int dram_init(void)
> +{
> + /* hardcode the DRAM size for now */
> + gd->ram_size = DRAM_MAX_SIZE;
> + post_code(POST_DRAM);
> +
> + return 0;
> +}
> +
> +void dram_init_banksize(void)
> +{
> + gd->bd->bi_dram[0].start = 0;
> + gd->bd->bi_dram[0].size = gd->ram_size;
> +}
> +
> +/*
> + * This function looks for the highest region of memory lower than 4GB which
> + * has enough space for U-Boot where U-Boot is aligned on a page boundary.
> + * It overrides the default implementation found elsewhere which simply
> + * picks the end of ram, wherever that may be. The location of the stack,
> + * the relocation address, and how far U-Boot is moved by relocation are
> + * set in the global data structure.
> + */
> +ulong board_get_usable_ram_top(ulong total_size)
> +{
> + return gd->ram_size;
> +}
> diff --git a/arch/x86/cpu/quark/pci.c b/arch/x86/cpu/quark/pci.c
> new file mode 100644
> index 0000000..354e15a
> --- /dev/null
> +++ b/arch/x86/cpu/quark/pci.c
> @@ -0,0 +1,70 @@
> +/*
> + * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <pci.h>
> +#include <asm/pci.h>
> +#include <asm/arch/device.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +void board_pci_setup_hose(struct pci_controller *hose)
> +{
> + hose->first_busno = 0;
> + hose->last_busno = 0;
> +
> + /* PCI memory space */
> + pci_set_region(hose->regions + 0,
> + CONFIG_PCI_MEM_BUS,
> + CONFIG_PCI_MEM_PHYS,
> + CONFIG_PCI_MEM_SIZE,
> + PCI_REGION_MEM);
> +
> + /* PCI IO space */
> + pci_set_region(hose->regions + 1,
> + CONFIG_PCI_IO_BUS,
> + CONFIG_PCI_IO_PHYS,
> + CONFIG_PCI_IO_SIZE,
> + PCI_REGION_IO);
> +
> + pci_set_region(hose->regions + 2,
> + CONFIG_PCI_PREF_BUS,
> + CONFIG_PCI_PREF_PHYS,
> + CONFIG_PCI_PREF_SIZE,
> + PCI_REGION_PREFETCH);
> +
> + pci_set_region(hose->regions + 3,
> + 0,
> + 0,
> + gd->ram_size,
> + PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
> +
> + hose->region_count = 4;
> +}
> +
> +int board_pci_post_scan(struct pci_controller *hose)
> +{
> + return 0;
> +}
> +
> +int pci_skip_dev(struct pci_controller *hose, pci_dev_t dev)
> +{
> + /*
> + * TODO:
> + *
> + * For some unknown reason, the PCI enumeration process hangs
> + * when it scans to the PCIe root port 0 (D23:F0) & 1 (D23:F1).
> + *
> + * For now we just skip these two devices, and this needs to
> + * be revisited later.
> + */
> + if (dev == QUARK_HOST_BRIDGE ||
> + dev == QUARK_PCIE0 || dev == QUARK_PCIE1) {
> + return 1;
BTW I saw a similar thing on Minnowboard Max.
> + }
> +
> + return 0;
> +}
> diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c
> new file mode 100644
> index 0000000..47ba152
> --- /dev/null
> +++ b/arch/x86/cpu/quark/quark.c
> @@ -0,0 +1,44 @@
> +/*
> + * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <asm/io.h>
> +#include <asm/pci.h>
> +#include <asm/post.h>
> +#include <asm/processor.h>
> +
> +int arch_cpu_init(void)
> +{
> + struct pci_controller *hose;
> + int ret;
> +
> + post_code(POST_CPU_INIT);
> +#ifdef CONFIG_SYS_X86_TSC_TIMER
> + timer_set_base(rdtsc());
> +#endif
> +
> + ret = x86_cpu_init_f();
> + if (ret)
> + return ret;
> +
> + ret = pci_early_init_hose(&hose);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +int print_cpuinfo(void)
> +{
> + post_code(POST_CPU_INFO);
> + return default_print_cpuinfo();
> +}
> +
> +void reset_cpu(ulong addr)
> +{
> + /* cold reset */
> + outb(0x08, PORT_RESET);
> +}
> diff --git a/arch/x86/include/asm/arch-quark/gpio.h b/arch/x86/include/asm/arch-quark/gpio.h
> new file mode 100644
> index 0000000..ca8cba4
> --- /dev/null
> +++ b/arch/x86/include/asm/arch-quark/gpio.h
> @@ -0,0 +1,13 @@
> +/*
> + * Copyright (C) 2015, Bin Meng <bmeng.cn at gmail.com>
> + *
> + * SPDX-License-Identifier: GPL-2.0+
> + */
> +
> +#ifndef _X86_ARCH_GPIO_H_
> +#define _X86_ARCH_GPIO_H_
> +
> +/* Where in config space is the register that points to the GPIO registers? */
> +#define PCI_CFG_GPIOBASE 0x44
Should this be in device tree?
> +
> +#endif /* _X86_ARCH_GPIO_H_ */
> --
> 1.8.2.1
>
Looks good to me.
Regards,
Simon
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