From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/nios2/platform/Kconfig.platform | 148 +++++++++++++++++++++++++++++++++++ arch/nios2/platform/Makefile | 2 + arch/nios2/platform/platform.c | 52 ++++++++++++ 3 files changed, 202 insertions(+) create mode 100644 arch/nios2/platform/Kconfig.platform create mode 100644 arch/nios2/platform/Makefile create mode 100644 arch/nios2/platform/platform.c (limited to 'arch/nios2/platform') diff --git a/arch/nios2/platform/Kconfig.platform b/arch/nios2/platform/Kconfig.platform new file mode 100644 index 000000000..e849daff6 --- /dev/null +++ b/arch/nios2/platform/Kconfig.platform @@ -0,0 +1,148 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "Platform options" + +comment "Memory settings" + +config NIOS2_MEM_BASE + hex "Memory base address" + default "0x00000000" + help + This is the physical address of the memory that the kernel will run + from. This address is used to link the kernel and setup initial memory + management. You should take the raw memory address without any MMU + or cache bits set. + Please not that this address is used directly so you have to manually + do address translation if it's connected to a bridge. + +comment "Device tree" + +config NIOS2_DTB_AT_PHYS_ADDR + bool "DTB at physical address" + help + When enabled you can select a physical address to load the dtb from. + Normally this address is passed by a bootloader such as u-boot but + using this you can use a devicetree without a bootloader. + This way you can store a devicetree in NOR flash or an onchip rom. + Please note that this address is used directly so you have to manually + do address translation if it's connected to a bridge. Also take into + account that when using an MMU you'd have to ad 0xC0000000 to your + address + +config NIOS2_DTB_PHYS_ADDR + hex "DTB Address" + depends on NIOS2_DTB_AT_PHYS_ADDR + default "0xC0000000" + help + Physical address of a dtb blob. + +config NIOS2_DTB_SOURCE_BOOL + bool "Compile and link device tree into kernel image" + depends on !COMPILE_TEST + help + This allows you to specify a dts (device tree source) file + which will be compiled and linked into the kernel image. + +config NIOS2_DTB_SOURCE + string "Device tree source file" + depends on NIOS2_DTB_SOURCE_BOOL + default "" + help + Absolute path to the device tree source (dts) file describing your + system. + +comment "Nios II instructions" + +config NIOS2_ARCH_REVISION + int "Select Nios II architecture revision" + range 1 2 + default 1 + help + Select between Nios II R1 and Nios II R2 . The architectures + are binary incompatible. Default is R1 . + +config NIOS2_HW_MUL_SUPPORT + bool "Enable MUL instruction" + help + Set to true if you configured the Nios II to include the MUL + instruction. This will enable the -mhw-mul compiler flag. + +config NIOS2_HW_MULX_SUPPORT + bool "Enable MULX instruction" + help + Set to true if you configured the Nios II to include the MULX + instruction. Enables the -mhw-mulx compiler flag. + +config NIOS2_HW_DIV_SUPPORT + bool "Enable DIV instruction" + help + Set to true if you configured the Nios II to include the DIV + instruction. Enables the -mhw-div compiler flag. + +config NIOS2_BMX_SUPPORT + bool "Enable BMX instructions" + depends on NIOS2_ARCH_REVISION = 2 + help + Set to true if you configured the Nios II R2 to include + the BMX Bit Manipulation Extension instructions. Enables + the -mbmx compiler flag. + +config NIOS2_CDX_SUPPORT + bool "Enable CDX instructions" + depends on NIOS2_ARCH_REVISION = 2 + help + Set to true if you configured the Nios II R2 to include + the CDX Bit Manipulation Extension instructions. Enables + the -mcdx compiler flag. + +config NIOS2_FPU_SUPPORT + bool "Custom floating point instr support" + help + Enables the -mcustom-fpu-cfg=60-1 compiler flag. + +config NIOS2_CI_SWAB_SUPPORT + bool "Byteswap custom instruction" + help + Use the byteswap (endian converter) Nios II custom instruction provided + by Altera and which can be enabled in QSYS builder. This accelerates + endian conversions in the kernel (e.g. ntohs). + +config NIOS2_CI_SWAB_NO + int "Byteswap custom instruction number" if NIOS2_CI_SWAB_SUPPORT + default 0 + help + Number of the instruction as configured in QSYS Builder. + +comment "Cache settings" + +config CUSTOM_CACHE_SETTINGS + bool "Custom cache settings" + help + This option allows you to tweak the cache settings used during early + boot (where the information from device tree is not yet available). + There should be no reason to change these values. Linux will work + perfectly fine, even if the Nios II is configured with smaller caches. + + Say N here unless you know what you are doing. + +config NIOS2_DCACHE_SIZE + hex "D-Cache size" if CUSTOM_CACHE_SETTINGS + range 0x200 0x10000 + default "0x800" + help + Maximum possible data cache size. + +config NIOS2_DCACHE_LINE_SIZE + hex "D-Cache line size" if CUSTOM_CACHE_SETTINGS + range 0x10 0x20 + default "0x20" + help + Minimum possible data cache line size. + +config NIOS2_ICACHE_SIZE + hex "I-Cache size" if CUSTOM_CACHE_SETTINGS + range 0x200 0x10000 + default "0x1000" + help + Maximum possible instruction cache size. + +endmenu diff --git a/arch/nios2/platform/Makefile b/arch/nios2/platform/Makefile new file mode 100644 index 000000000..fb5bdb44c --- /dev/null +++ b/arch/nios2/platform/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-y += platform.o diff --git a/arch/nios2/platform/platform.c b/arch/nios2/platform/platform.c new file mode 100644 index 000000000..9737a8712 --- /dev/null +++ b/arch/nios2/platform/platform.c @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2013 Altera Corporation + * Copyright (C) 2011 Thomas Chou + * Copyright (C) 2011 Walter Goossens + * + * This file is subject to the terms and conditions of the GNU General + * Public License. See the file COPYING in the main directory of this + * archive for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +static const struct of_device_id clk_match[] __initconst = { + { .compatible = "fixed-clock", .data = of_fixed_clk_setup, }, + {} +}; + +static int __init nios2_soc_device_init(void) +{ + struct soc_device *soc_dev; + struct soc_device_attribute *soc_dev_attr; + const char *machine; + + soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); + if (soc_dev_attr) { + machine = of_flat_dt_get_machine_name(); + if (machine) + soc_dev_attr->machine = kasprintf(GFP_KERNEL, "%s", + machine); + + soc_dev_attr->family = "Nios II"; + + soc_dev = soc_device_register(soc_dev_attr); + if (IS_ERR(soc_dev)) { + kfree(soc_dev_attr->machine); + kfree(soc_dev_attr); + } + } + + of_clk_init(clk_match); + + return 0; +} + +device_initcall(nios2_soc_device_init); -- cgit v1.2.3