x86: Add basic Intel Quark processor support

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@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/cpu/quark/Kconfig b/arch/x86/cpu/quark/Kconfig
new file mode 100644 (file)
index 0000000..163caac
--- /dev/null
+++ b/arch/x86/cpu/quark/Kconfig
@@ -0,0 +1,121 @@
+#
+# Copyright (C) 2015, Bin Meng <bmeng.cn@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
+         within the Quark SoC processor to access when powered up before
+         system BIOS is executed.
+
+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 ESRAM_BASE
+       hex
+       default 0x80000000
+       help
+         Embedded SRAM (eSRAM) memory-mapped base address.
+
+config PCIE_ECAM_BASE
+       hex
+       default 0xe0000000
+
+config RCBA_BASE
+       hex
+       default 0xfed1c000
+       help
+         Root Complex register block memory-mapped base address.
+
+config ACPI_PM1_BASE
+       hex
+       default 0x1000
+       help
+         ACPI Power Managment 1 (PM1) i/o-mapped base address.
+         This device is defined in ACPI specification, with 16 bytes in size.
+
+config ACPI_PBLK_BASE
+       hex
+       default 0x1010
+       help
+         ACPI Processor Block (PBLK) i/o-mapped base address.
+         This device is defined in ACPI specification, with 16 bytes in size.
+
+config SPI_DMA_BASE
+       hex
+       default 0x1020
+       help
+         SPI DMA i/o-mapped base address.
+
+config GPIO_BASE
+       hex
+       default 0x1080
+       help
+         GPIO i/o-mapped base address.
+
+config ACPI_GPE0_BASE
+       hex
+       default 0x1100
+       help
+         ACPI General Purpose Event 0 (GPE0) i/o-mapped base address.
+         This device is defined in ACPI specification, with 64 bytes in size.
+
+config WDT_BASE
+       hex
+       default 0x1140
+       help
+         Watchdog timer i/o-mapped base address.
+
+config SYS_CAR_ADDR
+       hex
+       default ESRAM_BASE
+
+config SYS_CAR_SIZE
+       hex
+       default 0x8000
+       help
+         Space in bytes in eSRAM used as Cache-As-ARM (CAR).
+         Note this size must not exceed eSRAM's total size.
+
+endif

diff --git a/arch/x86/cpu/quark/Makefile b/arch/x86/cpu/quark/Makefile
new file mode 100644 (file)
index 0000000..168c1e6
--- /dev/null
+++ b/arch/x86/cpu/quark/Makefile
@@ -0,0 +1,8 @@
+#
+# Copyright (C) 2015, Bin Meng <bmeng.cn@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 (file)
index 0000000..fbdc3cd
--- /dev/null
+++ b/arch/x86/cpu/quark/dram.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@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 (file)
index 0000000..354e15a
--- /dev/null
+++ b/arch/x86/cpu/quark/pci.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@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;
+       }
+
+       return 0;
+}

diff --git a/arch/x86/cpu/quark/quark.c b/arch/x86/cpu/quark/quark.c
new file mode 100644 (file)
index 0000000..47ba152
--- /dev/null
+++ b/arch/x86/cpu/quark/quark.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@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 (file)
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@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
+
+#endif /* _X86_ARCH_GPIO_H_ */