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    Subject[patch v2 33/35] Hexagon: Add configuration and makefiles for the Hexagon architecture.
    Signed-off-by: Linas Vepstas <linas@codeaurora.org>
    Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

    ---
    arch/hexagon/Kconfig | 221 ++++++++++++++++++++++++++++++++++++++
    arch/hexagon/Makefile | 59 ++++++++++
    arch/hexagon/kernel/Makefile | 19 +++
    arch/hexagon/kernel/asm-offsets.c | 104 +++++++++++++++++
    arch/hexagon/kernel/vmlinux.lds.S | 93 +++++++++++++++
    arch/hexagon/lib/Makefile | 4
    arch/hexagon/mm/Makefile | 7 +
    7 files changed, 507 insertions(+)

    Index: linux-hexagon-kernel/arch/hexagon/Kconfig
    ===================================================================
    --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    +++ linux-hexagon-kernel/arch/hexagon/Kconfig 2011-08-25 17:25:29.049224804 -0500
    @@ -0,0 +1,221 @@
    +# Hexagon configuration
    +comment "Linux Kernel Configuration for Hexagon"
    +
    +config HEXAGON
    + def_bool y
    + select HAVE_OPROFILE
    + # We will need this to get tickless NOHZ
    + # select USE_GENERIC_SMP_HELPERS if SMP
    + # Other pending projects/to-do items.
    + # select HAVE_REGS_AND_STACK_ACCESS_API
    + # select HAVE_HW_BREAKPOINT if PERF_EVENTS
    + # select ARCH_HAS_CPU_IDLE_WAIT
    + # select ARCH_WANT_OPTIONAL_GPIOLIB
    + # select ARCH_REQUIRE_GPIOLIB
    + # select HAVE_CLK
    + # select IRQ_PER_CPU
    + select HAVE_IRQ_WORK
    + # select GENERIC_PENDING_IRQ if SMP
    + select GENERIC_ATOMIC64
    + select HAVE_PERF_EVENTS
    + select HAVE_GENERIC_HARDIRQS
    + select GENERIC_HARDIRQS_NO__DO_IRQ
    + select GENERIC_HARDIRQS_NO_DEPRECATED
    + # GENERIC_ALLOCATOR is used by dma_alloc_coherent()
    + select GENERIC_ALLOCATOR
    + select HAVE_ARCH_KGDB
    + # mostly generic routines, with some accelerated ones
    + ---help---
    + Qualcomm Hexagon is a processor architecture designed for high
    + performance and low power across a wide variety of applications.
    +
    +config HEXAGON_ARCH_V1
    + bool
    +
    +config HEXAGON_ARCH_V2
    + bool
    +
    +config HEXAGON_ARCH_V3
    + bool
    +
    +config HEXAGON_ARCH_V4
    + bool
    +
    +config FRAME_POINTER
    + def_bool y
    +
    +config LOCKDEP_SUPPORT
    + def_bool y
    +
    +config PCI
    + def_bool n
    +
    +config EARLY_PRINTK
    + def_bool y
    +
    +config KTIME_SCALAR
    + def_bool y
    +
    +config MMU
    + def_bool y
    +
    +config TRACE_IRQFLAGS_SUPPORT
    + def_bool y
    +
    +config GENERIC_CSUM
    + def_bool y
    +
    +#
    +# Use the generic interrupt handling code in kernel/irq/:
    +#
    +config GENERIC_IRQ_PROBE
    + def_bool y
    +
    +config GENERIC_IOMAP
    + def_bool y
    +
    +#config ZONE_DMA
    +# bool
    +# default y
    +
    +config HAS_DMA
    + bool
    + select HAVE_DMA_ATTRS
    + default y
    +
    +config NEED_SG_DMA_LENGTH
    + def_bool y
    +
    +config RWSEM_GENERIC_SPINLOCK
    + def_bool n
    +
    +config RWSEM_XCHGADD_ALGORITHM
    + def_bool y
    +
    +config GENERIC_CALIBRATE_DELAY
    + def_bool y
    +
    +config GENERIC_FIND_NEXT_BIT
    + def_bool y
    +
    +config GENERIC_HWEIGHT
    + def_bool y
    +
    +config GENERIC_TIME
    + def_bool y
    +
    +config GENERIC_CLOCKEVENTS
    + def_bool y
    +
    +config GENERIC_CLOCKEVENTS_BROADCAST
    + def_bool y
    +
    +config STACKTRACE_SUPPORT
    + def_bool y
    + select STACKTRACE
    +
    +config GENERIC_BUG
    + def_bool y
    + depends on BUG
    +
    +config BUG
    + def_bool y
    +
    +menu "Machine selection"
    +
    +choice
    + prompt "System type"
    + default HEXAGON_ARCH_V2
    +
    +config HEXAGON_COMET
    + bool "Comet Board"
    + select HEXAGON_ARCH_V2
    + ---help---
    + Support for the Comet platform.
    +
    +endchoice
    +
    +config HEXAGON_VM
    + def_bool y
    +
    +config CMDLINE
    + string "Default kernel command string"
    + default ""
    + help
    + On some platforms, there is currently no way for the boot loader
    + to pass arguments to the kernel. For these, you should supply some
    + command-line options at build time by entering them here. At a
    + minimum, you should specify the memory size and the root device
    + (e.g., mem=64M root=/dev/nfs).
    +
    +config HEXAGON_ANGEL_TRAPS
    + bool "Use Angel Traps"
    + default n
    + ---help---
    + Enable angel debug traps (for printk's).
    +
    +config SMP
    + bool "Multi-Processing support"
    + ---help---
    + Enables SMP support in the kernel. If unsure, say "Y"
    +
    +config NR_CPUS
    + int "Maximum number of CPUs" if SMP
    + range 2 6 if SMP
    + default "1" if !SMP
    + default "6" if SMP
    + ---help---
    + This allows you to specify the maximum number of CPUs which this
    + kernel will support. The maximum supported value is 6 and the
    + minimum value which makes sense is 2.
    +
    + This is purely to save memory - each supported CPU adds
    + approximately eight kilobytes to the kernel image.
    +
    +choice
    + prompt "Kernel page size"
    + default PAGE_SIZE_4KB
    + ---help---
    + Changes the default page size; use with caution.
    +
    +config PAGE_SIZE_4KB
    + bool "4KB"
    +
    +config PAGE_SIZE_16KB
    + bool "16KB"
    +
    +config PAGE_SIZE_64KB
    + bool "64KB"
    +
    +config PAGE_SIZE_256KB
    + bool "256KB"
    +
    +endchoice
    +
    +source "mm/Kconfig"
    +
    +source "kernel/Kconfig.hz"
    +source "kernel/time/Kconfig"
    +
    +config GENERIC_GPIO
    + bool "Generic GPIO support"
    + default n
    +
    +endmenu
    +
    +source "init/Kconfig"
    +source "drivers/Kconfig"
    +source "fs/Kconfig"
    +
    +menu "Executable File Formats"
    +source "fs/Kconfig.binfmt"
    +endmenu
    +
    +source "net/Kconfig"
    +source "security/Kconfig"
    +source "crypto/Kconfig"
    +source "lib/Kconfig"
    +
    +menu "Kernel hacking"
    +source "lib/Kconfig.debug"
    +endmenu
    Index: linux-hexagon-kernel/arch/hexagon/kernel/asm-offsets.c
    ===================================================================
    --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    +++ linux-hexagon-kernel/arch/hexagon/kernel/asm-offsets.c 2011-08-25 14:51:46.673968922 -0500
    @@ -0,0 +1,104 @@
    +/*
    + * Copyright (C) 1996 David S. Miller
    + * Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003 Ralf Baechle
    + * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
    + * Kevin Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
    + * Copyright (C) 2000 MIPS Technologies, Inc.
    + *
    + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 and
    + * only version 2 as published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    + * 02110-1301, USA.
    + */
    +
    +#include <linux/compat.h>
    +#include <linux/types.h>
    +#include <linux/sched.h>
    +#include <linux/mm.h>
    +#include <linux/interrupt.h>
    +#include <linux/kbuild.h>
    +#include <asm/ptrace.h>
    +#include <asm/processor.h>
    +
    +/* This file is used to produce asm/linkerscript constants from header
    + files typically used in c. Specifically, it generates asm-offsets.h */
    +
    +int main(void)
    +{
    + COMMENT("This is a comment.");
    + /* might get these from somewhere else. */
    + DEFINE(_PAGE_SIZE, PAGE_SIZE);
    + DEFINE(_PAGE_SHIFT, PAGE_SHIFT);
    + BLANK();
    +
    + COMMENT("Hexagon pt_regs definitions");
    + OFFSET(_PT_SYSCALL_NR, pt_regs, syscall_nr);
    + OFFSET(_PT_UGPGP, pt_regs, ugpgp);
    + OFFSET(_PT_R3130, pt_regs, r3130);
    + OFFSET(_PT_R2928, pt_regs, r2928);
    + OFFSET(_PT_R2726, pt_regs, r2726);
    + OFFSET(_PT_R2524, pt_regs, r2524);
    + OFFSET(_PT_R2322, pt_regs, r2322);
    + OFFSET(_PT_R2120, pt_regs, r2120);
    + OFFSET(_PT_R1918, pt_regs, r1918);
    + OFFSET(_PT_R1716, pt_regs, r1716);
    + OFFSET(_PT_R1514, pt_regs, r1514);
    + OFFSET(_PT_R1312, pt_regs, r1312);
    + OFFSET(_PT_R1110, pt_regs, r1110);
    + OFFSET(_PT_R0908, pt_regs, r0908);
    + OFFSET(_PT_R0706, pt_regs, r0706);
    + OFFSET(_PT_R0504, pt_regs, r0504);
    + OFFSET(_PT_R0302, pt_regs, r0302);
    + OFFSET(_PT_R0100, pt_regs, r0100);
    + OFFSET(_PT_LC0SA0, pt_regs, lc0sa0);
    + OFFSET(_PT_LC1SA1, pt_regs, lc1sa1);
    + OFFSET(_PT_M1M0, pt_regs, m1m0);
    + OFFSET(_PT_PREDSUSR, pt_regs, predsusr);
    + OFFSET(_PT_EVREC, pt_regs, hvmer);
    + OFFSET(_PT_ER_VMEL, pt_regs, hvmer.vmel);
    + OFFSET(_PT_ER_VMEST, pt_regs, hvmer.vmest);
    + OFFSET(_PT_ER_VMPSP, pt_regs, hvmer.vmpsp);
    + OFFSET(_PT_ER_VMBADVA, pt_regs, hvmer.vmbadva);
    + DEFINE(_PT_REGS_SIZE, sizeof(struct pt_regs));
    + BLANK();
    +
    + COMMENT("Hexagon thread_info definitions");
    + OFFSET(_THREAD_INFO_FLAGS, thread_info, flags);
    + OFFSET(_THREAD_INFO_PT_REGS, thread_info, regs);
    + OFFSET(_THREAD_INFO_SP, thread_info, sp);
    + DEFINE(_THREAD_SIZE, THREAD_SIZE);
    + BLANK();
    +
    + COMMENT("Hexagon hexagon_switch_stack definitions");
    + OFFSET(_SWITCH_R1716, hexagon_switch_stack, r1716);
    + OFFSET(_SWITCH_R1918, hexagon_switch_stack, r1918);
    + OFFSET(_SWITCH_R2120, hexagon_switch_stack, r2120);
    + OFFSET(_SWITCH_R2322, hexagon_switch_stack, r2322);
    +
    + OFFSET(_SWITCH_R2524, hexagon_switch_stack, r2524);
    + OFFSET(_SWITCH_R2726, hexagon_switch_stack, r2726);
    + OFFSET(_SWITCH_FP, hexagon_switch_stack, fp);
    + OFFSET(_SWITCH_LR, hexagon_switch_stack, lr);
    + DEFINE(_SWITCH_STACK_SIZE, sizeof(struct hexagon_switch_stack));
    + BLANK();
    +
    + COMMENT("Hexagon task_struct definitions");
    + OFFSET(_TASK_THREAD_INFO, task_struct, stack);
    + OFFSET(_TASK_STRUCT_THREAD, task_struct, thread);
    +
    + COMMENT("Hexagon thread_struct definitions");
    + OFFSET(_THREAD_STRUCT_SWITCH_SP, thread_struct, switch_sp);
    +
    + return 0;
    +}
    Index: linux-hexagon-kernel/arch/hexagon/kernel/vmlinux.lds.S
    ===================================================================
    --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    +++ linux-hexagon-kernel/arch/hexagon/kernel/vmlinux.lds.S 2011-08-25 17:20:52.048602290 -0500
    @@ -0,0 +1,93 @@
    +/*
    + * Linker script for Hexagon kernel
    + *
    + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
    + *
    + * This program is free software; you can redistribute it and/or modify
    + * it under the terms of the GNU General Public License version 2 and
    + * only version 2 as published by the Free Software Foundation.
    + *
    + * This program is distributed in the hope that it will be useful,
    + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    + * GNU General Public License for more details.
    + *
    + * You should have received a copy of the GNU General Public License
    + * along with this program; if not, write to the Free Software
    + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    + * 02110-1301, USA.
    + */
    +
    +#define LOAD_OFFSET PAGE_OFFSET
    +
    +#include <asm-generic/vmlinux.lds.h>
    +#include <asm/asm-offsets.h> /* Most of the kernel defines are here */
    +#include <asm/mem-layout.h> /* except for page_offset */
    +#include <asm/cache.h> /* and now we're pulling cache line size */
    +OUTPUT_ARCH(hexagon)
    +ENTRY(stext)
    +
    +jiffies = jiffies_64;
    +
    +/*
    +See asm-generic/vmlinux.lds.h for expansion of some of these macros.
    +See asm-generic/sections.h for seemingly required labels.
    +*/
    +
    +#define PAGE_SIZE _PAGE_SIZE
    +
    +/* This LOAD_OFFSET is temporary for debugging on the simulator; it may change
    + for hypervisor pseudo-physical memory. */
    +
    +
    +SECTIONS
    +{
    + . = PAGE_OFFSET + LOAD_ADDRESS;
    +
    + __init_begin = .;
    + HEAD_TEXT_SECTION
    + INIT_TEXT_SECTION(PAGE_SIZE)
    + PERCPU_SECTION(L1_CACHE_BYTES)
    + __init_end = .;
    +
    + . = ALIGN(_PAGE_SIZE);
    + _stext = .;
    + .text : AT(ADDR(.text) - LOAD_OFFSET) {
    + _text = .;
    + TEXT_TEXT
    + SCHED_TEXT
    + LOCK_TEXT
    + KPROBES_TEXT
    + *(.fixup)
    + }
    + _etext = .;
    +
    + INIT_DATA_SECTION(PAGE_SIZE)
    +
    + _sdata = .;
    + RW_DATA_SECTION(32,PAGE_SIZE,PAGE_SIZE)
    + RO_DATA_SECTION(PAGE_SIZE)
    + _edata = .;
    +
    + EXCEPTION_TABLE(16)
    + NOTES
    +
    + BSS_SECTION(_PAGE_SIZE, _PAGE_SIZE, _PAGE_SIZE)
    +
    + _end = .;
    +
    + /DISCARD/ : {
    + EXIT_TEXT
    + EXIT_DATA
    + EXIT_CALL
    + }
    +
    + STABS_DEBUG
    + DWARF_DEBUG
    +
    +}
    +
    +
    +
    +
    +
    Index: linux-hexagon-kernel/arch/hexagon/lib/Makefile
    ===================================================================
    --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    +++ linux-hexagon-kernel/arch/hexagon/lib/Makefile 2011-08-25 14:51:46.673968922 -0500
    @@ -0,0 +1,4 @@
    +#
    +# Makefile for hexagon-specific library files.
    +#
    +obj-y = checksum.o io.o memcpy.o memset.o
    Index: linux-hexagon-kernel/arch/hexagon/Makefile
    ===================================================================
    --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    +++ linux-hexagon-kernel/arch/hexagon/Makefile 2011-08-25 17:44:47.232043254 -0500
    @@ -0,0 +1,59 @@
    +# Makefile for the Hexagon arch
    +
    +KBUILD_DEFCONFIG = comet_defconfig
    +
    +# Do not use GP-relative jumps
    +KBUILD_CFLAGS += -G0
    +LDFLAGS_vmlinux += -G0
    +
    +# Do not use single-byte enums; these will overflow.
    +KBUILD_CFLAGS += -fno-short-enums
    +
    +# Modules must use either long-calls, or use pic/plt.
    +# Use long-calls for now, it's easier. And faster.
    +# CFLAGS_MODULE += -fPIC
    +# LDFLAGS_MODULE += -shared
    +CFLAGS_MODULE += -mlong-calls
    +
    +cflags-$(CONFIG_HEXAGON_ARCH_V1) += $(call cc-option,-mv1)
    +cflags-$(CONFIG_HEXAGON_ARCH_V2) += $(call cc-option,-mv2)
    +cflags-$(CONFIG_HEXAGON_ARCH_V3) += $(call cc-option,-mv3)
    +cflags-$(CONFIG_HEXAGON_ARCH_V4) += $(call cc-option,-mv4)
    +
    +aflags-$(CONFIG_HEXAGON_ARCH_V1) += $(call cc-option,-mv1)
    +aflags-$(CONFIG_HEXAGON_ARCH_V2) += $(call cc-option,-mv2)
    +aflags-$(CONFIG_HEXAGON_ARCH_V3) += $(call cc-option,-mv3)
    +aflags-$(CONFIG_HEXAGON_ARCH_V4) += $(call cc-option,-mv4)
    +
    +ldflags-$(CONFIG_HEXAGON_ARCH_V1) += $(call cc-option,-mv1)
    +ldflags-$(CONFIG_HEXAGON_ARCH_V2) += $(call cc-option,-mv2)
    +ldflags-$(CONFIG_HEXAGON_ARCH_V3) += $(call cc-option,-mv3)
    +ldflags-$(CONFIG_HEXAGON_ARCH_V4) += $(call cc-option,-mv4)
    +
    +KBUILD_CFLAGS += $(cflags-y)
    +KBUILD_AFLAGS += $(aflags-y)
    +
    +# no KBUILD_LDFLAGS?
    +LDFLAGS += $(ldflags-y)
    +
    +# Thread-info register will be r19. This value is not configureable;
    +# it is hard-coded in several files.
    +TIR_NAME := r19
    +KBUILD_CFLAGS += -ffixed-$(TIR_NAME) -DTHREADINFO_REG=$(TIR_NAME) -D__linux__
    +KBUILD_AFLAGS += -DTHREADINFO_REG=$(TIR_NAME)
    +
    +LIBGCC := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
    +libs-y += $(LIBGCC)
    +
    +head-y := arch/hexagon/kernel/head.o \
    + arch/hexagon/kernel/init_task.o
    +
    +core-y += arch/hexagon/kernel/ \
    + arch/hexagon/mm/ \
    + arch/hexagon/lib/
    +
    +# arch/hexagon/platform/common/
    +#
    +#core-$(CONFIG_HEXAGON_COMET) += arch/hexagon/platform/comet/
    +#machine-$(CONFIG_HEXAGON_COMET) := comet
    +
    Index: linux-hexagon-kernel/arch/hexagon/mm/Makefile
    ===================================================================
    --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    +++ linux-hexagon-kernel/arch/hexagon/mm/Makefile 2011-08-25 18:54:03.913200715 -0500
    @@ -0,0 +1,7 @@
    +#
    +# Makefile for Hexagon memory management subsystem
    +#
    +
    +obj-y := init.o pgalloc.o ioremap.o uaccess.o vm_fault.o cache.o
    +obj-y += copy_to_user.o copy_from_user.o strnlen_user.o vm_tlb.o
    +
    Index: linux-hexagon-kernel/arch/hexagon/kernel/Makefile
    ===================================================================
    --- /dev/null 1970-01-01 00:00:00.000000000 +0000
    +++ linux-hexagon-kernel/arch/hexagon/kernel/Makefile 2011-08-25 17:20:51.918601996 -0500
    @@ -0,0 +1,19 @@
    +extra-y := head.o vmlinux.lds init_task.o
    +
    +obj-$(CONFIG_SMP) += smp.o topology.o
    +
    +obj-y += irq.o setup.o irq_cpu.o traps.o syscalltab.o signal.o time.o
    +obj-y += process.o syscall.o trampoline.o reset.o ptrace.o
    +obj-y += delay.o
    +
    +obj-$(CONFIG_KGDB) += kgdb.o
    +obj-$(CONFIG_MODULES) += module.o hexagon_ksyms.o
    +
    +# Modules required to work with the Hexagon Virtual Machine
    +obj-y += vm_entry.o vm_events.o vm_switch.o vm_ops.o vm_init_segtable.o
    +obj-y += vm_vectors.o
    +
    +obj-$(CONFIG_HAS_DMA) += dma.o
    +
    +obj-$(CONFIG_STACKTRACE) += stacktrace.o
    +
    --

    Sent by an employee of the Qualcomm Innovation Center, Inc.
    The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.



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