[U-Boot] [RFC PATCH 4/6] x86: Add basic Intel Quark processor support
Bin Meng
bmeng.cn at gmail.com
Wed Jan 28 16:20:00 CET 2015
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
+ 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 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;
+ }
+
+ 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
+
+#endif /* _X86_ARCH_GPIO_H_ */
--
1.8.2.1
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