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Commit d70b1e06 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel 

Pull Hexagon fixes from Richard Kuo:
 "Changes for the Hexagon architecture (and one touching OpenRISC).

  They include various fixes to make use of additional arch features and
  cleanups.  The largest functional change is a cleanup of the signal
  and event return paths"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rkuo/linux-hexagon-kernel: (32 commits)
  Hexagon: add v4 CS regs to core copyout macro
  Hexagon: use correct translation for VMALLOC_START
  Hexagon: use correct translations for DMA mappings
  Hexagon: fix return value for notify_resume case in do_work_pending
  Hexagon: fix signal number for user mem faults
  Hexagon: remove two Kconfig entries
  arch: remove CONFIG_GENERIC_FIND_NEXT_BIT again
  Hexagon: update copyright dates
  Hexagon: add translation types for __vmnewmap
  Hexagon: fix signal.c compile error
  Hexagon: break up user fn/arg register setting
  Hexagon: use generic sys_fork, sys_vfork, and sys_clone
  Hexagon: fix psp/sp macro
  Hexagon: fix up int enable/disable at ret_from_fork
  Hexagon: add IOMEM and _relaxed IO macros
  Hexagon: switch to using the device type for IO mappings
  Hexagon: don't print info for offline CPU's
  Hexagon: add support for single-stepping (v4+)
  Hexagon: use correct work mask when checking for more work
  Hexagon: add support for additional exceptions
  ...
parents b0b88565 426d29cc

arch/hexagon/Kconfig

+10 −23
Original line number Diff line number Diff line
@@ -29,21 +29,17 @@ config HEXAGON 
	select GENERIC_CLOCKEVENTS

	select GENERIC_CLOCKEVENTS_BROADCAST

	select MODULES_USE_ELF_RELA

	select GENERIC_CPU_DEVICES

	select GENERIC_KERNEL_THREAD

	select GENERIC_KERNEL_EXECVE

	---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 HEXAGON_PHYS_OFFSET

	def_bool y

	---help---

	  Platforms that don't load the kernel at zero set this.



config FRAME_POINTER

	def_bool y
@@ -81,9 +77,6 @@ config RWSEM_GENERIC_SPINLOCK 
config RWSEM_XCHGADD_ALGORITHM

	def_bool y



config GENERIC_FIND_NEXT_BIT

	def_bool y



config GENERIC_HWEIGHT

	def_bool y
@@ -103,14 +96,14 @@ choice 


config HEXAGON_COMET

	bool "Comet Board"

	select HEXAGON_ARCH_V2

	---help---

	  Support for the Comet platform.



endchoice



config HEXAGON_VM

	def_bool y

config HEXAGON_ARCH_VERSION

	int "Architecture version"

	default 2



config CMDLINE

	string "Default kernel command string"
@@ -122,12 +115,6 @@ config CMDLINE 
	  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---

arch/hexagon/Makefile

+3 −14
Original line number Diff line number Diff line
@@ -15,20 +15,9 @@ KBUILD_CFLAGS += -fno-short-enums 
# 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)

cflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION})

aflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION})

ldflags-y += $(call cc-option,-mv${CONFIG_HEXAGON_ARCH_VERSION})



KBUILD_CFLAGS += $(cflags-y)

KBUILD_AFLAGS += $(aflags-y)

arch/hexagon/include/asm/Kbuild

+1 −1
Original line number Diff line number Diff line
@@ -25,7 +25,6 @@ generic-y += kdebug.h 
generic-y += kmap_types.h

generic-y += local64.h

generic-y += local.h

generic-y += local.h

generic-y += mman.h

generic-y += msgbuf.h

generic-y += pci.h
@@ -41,6 +40,7 @@ generic-y += sembuf.h 
generic-y += shmbuf.h

generic-y += shmparam.h

generic-y += siginfo.h

generic-y += sizes.h

generic-y += socket.h

generic-y += sockios.h

generic-y += statfs.h

arch/hexagon/include/asm/atomic.h

+12 −10
Original line number Diff line number Diff line 
/*

 * Atomic operations for the Hexagon architecture

 *

 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.

 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.

 *

 *

 * This program is free software; you can redistribute it and/or modify
@@ -117,35 +117,37 @@ static inline int atomic_sub_return(int i, atomic_t *v) 
#define atomic_sub(i, v) atomic_sub_return(i, (v))



/**

 * atomic_add_unless - add unless the number is a given value

 * __atomic_add_unless - add unless the number is a given value

 * @v: pointer to value

 * @a: amount to add

 * @u: unless value is equal to u

 *

 * Returns 1 if the add happened, 0 if it didn't.

 * Returns old value.

 *

 */



static inline int __atomic_add_unless(atomic_t *v, int a, int u)

{

	int output, __oldval;

	int __oldval;

	register int tmp;



	asm volatile(

		"1:	%0 = memw_locked(%2);"

		"	{"

		"		p3 = cmp.eq(%0, %4);"

		"		if (p3.new) jump:nt 2f;"

		"		%0 = add(%0, %3);"

		"		%1 = #0;"

		"		%1 = add(%0, %3);"

		"	}"

		"	memw_locked(%2, p3) = %0;"

		"	memw_locked(%2, p3) = %1;"

		"	{"

		"		if !p3 jump 1b;"

		"		%1 = #1;"

		"	}"

		"2:"

		: "=&r" (__oldval), "=&r" (output)

		: "=&r" (__oldval), "=&r" (tmp)

		: "r" (v), "r" (a), "r" (u)

		: "memory", "p3"

	);

	return output;

	return __oldval;

}



#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)

arch/hexagon/include/asm/elf.h

+16 −7
Original line number Diff line number Diff line 
/*

 * ELF definitions for the Hexagon architecture

 *

 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.

 * Copyright (c) 2010-2012, The Linux Foundation. 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
@@ -104,6 +104,16 @@ typedef unsigned long elf_fpregset_t; 
 * Bypass the whole "regsets" thing for now and use the define.

 */



#if CONFIG_HEXAGON_ARCH_VERSION >= 4

#define CS_COPYREGS(DEST,REGS) \

do {\

	DEST.cs0 = REGS->cs0;\

	DEST.cs1 = REGS->cs1;\

} while (0)

#else

#define CS_COPYREGS(DEST,REGS)

#endif



#define ELF_CORE_COPY_REGS(DEST, REGS)	\

do {					\

	DEST.r0 = REGS->r00;		\
@@ -148,13 +158,12 @@ do { \ 
	DEST.p3_0 = REGS->preds;	\

	DEST.gp = REGS->gp;		\

	DEST.ugp = REGS->ugp;		\

	CS_COPYREGS(DEST,REGS);		\

	DEST.pc = pt_elr(REGS);		\

	DEST.cause = pt_cause(REGS);	\

	DEST.badva = pt_badva(REGS);	\

} while (0);







/*

 * This is used to ensure we don't load something for the wrong architecture.

 * Checks the machine and ABI type.
@@ -168,15 +177,15 @@ do { \ 
#define ELF_DATA	ELFDATA2LSB

#define ELF_ARCH	EM_HEXAGON



#ifdef CONFIG_HEXAGON_ARCH_V2

#if CONFIG_HEXAGON_ARCH_VERSION == 2

#define ELF_CORE_EFLAGS 0x1

#endif



#ifdef CONFIG_HEXAGON_ARCH_V3

#if CONFIG_HEXAGON_ARCH_VERSION == 3

#define ELF_CORE_EFLAGS 0x2

#endif



#ifdef CONFIG_HEXAGON_ARCH_V4

#if CONFIG_HEXAGON_ARCH_VERSION == 4

#define ELF_CORE_EFLAGS 0x3

#endif