Commit cea8f46c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 

Pull ARM updates from Russell King:
 "First ARM push of this merge window, post me coming back from holiday.
  This is what has been in linux-next for the last few weeks.  Not much
  to say which isn't described by the commit summaries."

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (32 commits)
  ARM: 7463/1: topology: Update cpu_power according to DT information
  ARM: 7462/1: topology: factorize the update of sibling masks
  ARM: 7461/1: topology: Add arch_scale_freq_power function
  ARM: 7456/1: ptrace: provide separate functions for tracing syscall {entry,exit}
  ARM: 7455/1: audit: move syscall auditing until after ptrace SIGTRAP handling
  ARM: 7454/1: entry: don't bother with syscall tracing on ret_from_fork path
  ARM: 7453/1: audit: only allow syscall auditing for pure EABI userspace
  ARM: 7452/1: delay: allow timer-based delay implementation to be selected
  ARM: 7451/1: arch timer: implement read_current_timer and get_cycles
  ARM: 7450/1: dcache: select DCACHE_WORD_ACCESS for little-endian ARMv6+ CPUs
  ARM: 7449/1: use generic strnlen_user and strncpy_from_user functions
  ARM: 7448/1: perf: remove arm_perf_pmu_ids global enumeration
  ARM: 7447/1: rwlocks: remove unused branch labels from trylock routines
  ARM: 7446/1: spinlock: use ticket algorithm for ARMv6+ locking implementation
  ARM: 7445/1: mm: update CONTEXTIDR register to contain PID of current process
  ARM: 7444/1: kernel: add arch-timer C3STOP feature
  ARM: 7460/1: remove asm/locks.h
  ARM: 7439/1: head.S: simplify initial page table mapping
  ARM: 7437/1: zImage: Allow DTB command line concatenation with ATAG_CMDLINE
  ARM: 7436/1: Do not map the vectors page as write-through on UP systems
  ...
parents c1e7179a 91b006de

arch/arm/Kconfig

+22 −0
Original line number Diff line number Diff line
@@ -45,6 +45,9 @@ config ARM 
	select GENERIC_SMP_IDLE_THREAD

	select KTIME_SCALAR

	select GENERIC_CLOCKEVENTS_BROADCAST if SMP

	select GENERIC_STRNCPY_FROM_USER

	select GENERIC_STRNLEN_USER

	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN

	help

	  The ARM series is a line of low-power-consumption RISC chip designs

	  licensed by ARM Ltd and targeted at embedded applications and
@@ -2004,6 +2007,25 @@ config ARM_ATAG_DTB_COMPAT 
	  bootloaders, this option allows zImage to extract the information

	  from the ATAG list and store it at run time into the appended DTB.



choice

	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT

	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER



config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER

	bool "Use bootloader kernel arguments if available"

	help

	  Uses the command-line options passed by the boot loader instead of

	  the device tree bootargs property. If the boot loader doesn't provide

	  any, the device tree bootargs property will be used.



config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND

	bool "Extend with bootloader kernel arguments"

	help

	  The command-line arguments provided by the boot loader will be

	  appended to the the device tree bootargs property.



endchoice



config CMDLINE

	string "Default kernel command string"

	default ""

arch/arm/Kconfig.debug

+9 −0
Original line number Diff line number Diff line
@@ -395,4 +395,13 @@ config ARM_KPROBES_TEST 
	help

	  Perform tests of kprobes API and instruction set simulation.



config PID_IN_CONTEXTIDR

	bool "Write the current PID to the CONTEXTIDR register"

	depends on CPU_COPY_V6

	help

	  Enabling this option causes the kernel to write the current PID to

	  the PROCID field of the CONTEXTIDR register, at the expense of some

	  additional instructions during context switch. Say Y here only if you

	  are planning to use hardware trace tools with this kernel.



endmenu

arch/arm/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -10,6 +10,9 @@ 
#

# Copyright (C) 1995-2001 by Russell King



# Ensure linker flags are correct

LDFLAGS		:=



LDFLAGS_vmlinux	:=-p --no-undefined -X

ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)

LDFLAGS_vmlinux	+= --be8

arch/arm/boot/compressed/atags_to_fdt.c

+60 −2
Original line number Diff line number Diff line 
#include <asm/setup.h>

#include <libfdt.h>



#if defined(CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND)

#define do_extend_cmdline 1

#else

#define do_extend_cmdline 0

#endif



static int node_offset(void *fdt, const char *node_path)

{

	int offset = fdt_path_offset(fdt, node_path);
@@ -36,6 +42,48 @@ static int setprop_cell(void *fdt, const char *node_path, 
	return fdt_setprop_cell(fdt, offset, property, val);

}



static const void *getprop(const void *fdt, const char *node_path,

			   const char *property, int *len)

{

	int offset = fdt_path_offset(fdt, node_path);



	if (offset == -FDT_ERR_NOTFOUND)

		return NULL;



	return fdt_getprop(fdt, offset, property, len);

}



static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline)

{

	char cmdline[COMMAND_LINE_SIZE];

	const char *fdt_bootargs;

	char *ptr = cmdline;

	int len = 0;



	/* copy the fdt command line into the buffer */

	fdt_bootargs = getprop(fdt, "/chosen", "bootargs", &len);

	if (fdt_bootargs)

		if (len < COMMAND_LINE_SIZE) {

			memcpy(ptr, fdt_bootargs, len);

			/* len is the length of the string

			 * including the NULL terminator */

			ptr += len - 1;

		}



	/* and append the ATAG_CMDLINE */

	if (fdt_cmdline) {

		len = strlen(fdt_cmdline);

		if (ptr - cmdline + len + 2 < COMMAND_LINE_SIZE) {

			*ptr++ = ' ';

			memcpy(ptr, fdt_cmdline, len);

			ptr += len;

		}

	}

	*ptr = '\0';



	setprop_string(fdt, "/chosen", "bootargs", cmdline);

}



/*

 * Convert and fold provided ATAGs into the provided FDT.

 *
@@ -72,6 +120,16 @@ int atags_to_fdt(void *atag_list, void *fdt, int total_space) 


	for_each_tag(atag, atag_list) {

		if (atag->hdr.tag == ATAG_CMDLINE) {

			/* Append the ATAGS command line to the device tree

			 * command line.

			 * NB: This means that if the same parameter is set in

			 * the device tree and in the tags, the one from the

			 * tags will be chosen.

			 */

			if (do_extend_cmdline)

				merge_fdt_bootargs(fdt,

						   atag->u.cmdline.cmdline);

			else

				setprop_string(fdt, "/chosen", "bootargs",

					       atag->u.cmdline.cmdline);

		} else if (atag->hdr.tag == ATAG_MEM) {

arch/arm/include/asm/arch_timer.h

+3 −0
Original line number Diff line number Diff line 
#ifndef __ASMARM_ARCH_TIMER_H

#define __ASMARM_ARCH_TIMER_H



#include <asm/errno.h>



#ifdef CONFIG_ARM_ARCH_TIMER

#define ARCH_HAS_READ_CURRENT_TIMER

int arch_timer_of_register(void);

int arch_timer_sched_clock_init(void);

#else

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