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Commit a643fc72 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linux 

Pull Xtensa fixes from Chris Zankel:
 - fix nommu support
 - remove s6000 variant and s6105 platform
 - fix permissions for kmapped pages so that copy_to_user_page works with them
 - add power management menu to Kconfig to allow use of runtime PM
 - disable linker optimizations because of a linker bug
 - fix sparse error

* tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linux:
  xtensa: disable link optimization
  xtensa/uaccess: fix sparse errors
  xtensa: fix kmap_prot definition
  xtensa: add power management menu to Kconfig
  xtensa: remove s6000 variant and s6105 platform
  xtensa: make PLATFORM_DEFAULT_MEM parameters configurable
  xtensa: nommu: clean up memory map dump
  xtensa: nommu: reserve memory below PLATFORM_DEFAULT_MEM_START
  xtensa: nommu: set up cache and atomctl in initialize_mmu
  xtensa: move vecbase SR initialization to _startup
  xtensa: nommu: fix uImage load address
  xtensa: nommu: fix load address definitions
  xtensa: nommu: fix Image.elf reset code and ld script
  xtensa: nommu: add MMU dependency to DEBUG_TLB_SANITY
  xtensa: nommu: don't build most of the cache flushing code
  xtensa: nommu: don't provide arch_get_unmapped_area
  xtensa: nommu: provide MAP_UNINITIALIZED definition
  xtensa: nommu: provide _PAGE_CHG_MASK definition
  xtensa: nommu: provide __invalidate_dcache_page_alias stub
  xtensa: nommu: move init_mmu stub to nommu_context.h
parents 0db2812a 1f2fdbd0

arch/xtensa/Kconfig

+42 −14
Original line number Diff line number Diff line
@@ -98,12 +98,6 @@ config XTENSA_VARIANT_DC233C 
	help

	  This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).



config XTENSA_VARIANT_S6000

	bool "s6000 - Stretch software configurable processor"

	select VARIANT_IRQ_SWITCH

	select ARCH_REQUIRE_GPIOLIB

	select XTENSA_CALIBRATE_CCOUNT



config XTENSA_VARIANT_CUSTOM

	bool "Custom Xtensa processor configuration"

	select MAY_HAVE_SMP
@@ -126,7 +120,6 @@ config XTENSA_VARIANT_NAME 
	default "dc232b"			if XTENSA_VARIANT_DC232B

	default "dc233c"			if XTENSA_VARIANT_DC233C

	default "fsf"				if XTENSA_VARIANT_FSF

	default "s6000"				if XTENSA_VARIANT_S6000

	default XTENSA_VARIANT_CUSTOM_NAME	if XTENSA_VARIANT_CUSTOM



config XTENSA_VARIANT_MMU
@@ -191,7 +184,6 @@ config HOTPLUG_CPU 


config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX

	bool "Initialize Xtensa MMU inside the Linux kernel code"

	depends on MMU

	default y

	help

	  Earlier version initialized the MMU in the exception vector
@@ -311,15 +303,10 @@ config XTENSA_PLATFORM_XT2000 
	  XT2000 is the name of Tensilica's feature-rich emulation platform.

	  This hardware is capable of running a full Linux distribution.



config XTENSA_PLATFORM_S6105

	bool "S6105"

	select HAVE_IDE

	select SERIAL_CONSOLE

	select NO_IOPORT_MAP



config XTENSA_PLATFORM_XTFPGA

	bool "XTFPGA"

	select ETHOC if ETHERNET

	select PLATFORM_WANT_DEFAULT_MEM

	select SERIAL_CONSOLE

	select XTENSA_CALIBRATE_CCOUNT

	help
@@ -406,6 +393,41 @@ source "drivers/pcmcia/Kconfig" 


source "drivers/pci/hotplug/Kconfig"



config PLATFORM_WANT_DEFAULT_MEM

	def_bool n



config DEFAULT_MEM_START

	hex "Physical address of the default memory area start"

	depends on PLATFORM_WANT_DEFAULT_MEM

	default 0x00000000 if MMU

	default 0x40000000 if !MMU

	help

	  This is a fallback start address of the default memory area, it is

	  used when no physical memory size is passed through DTB or through

	  boot parameter from bootloader.



	  In noMMU configuration the following parameters are derived from it:

	  - kernel load address;

	  - kernel entry point address;

	  - relocatable vectors base address;

	  - uBoot load address;

	  - TASK_SIZE.



	  If unsure, leave the default value here.



config DEFAULT_MEM_SIZE

	hex "Maximal size of the default memory area"

	depends on PLATFORM_WANT_DEFAULT_MEM

	default 0x04000000

	help

	  This is a fallback size of the default memory area, it is used when

	  no physical memory size is passed through DTB or through boot

	  parameter from bootloader.



	  It's also used for TASK_SIZE calculation in noMMU configuration.



	  If unsure, leave the default value here.



endmenu



menu "Executable file formats"
@@ -414,6 +436,12 @@ source "fs/Kconfig.binfmt" 


endmenu



menu "Power management options"



source "kernel/power/Kconfig"



endmenu



source "net/Kconfig"



source "drivers/Kconfig"

arch/xtensa/Kconfig.debug

+2 −2
Original line number Diff line number Diff line
@@ -4,7 +4,7 @@ source "lib/Kconfig.debug" 


config DEBUG_TLB_SANITY

	bool "Debug TLB sanity"

	depends on DEBUG_KERNEL

	depends on DEBUG_KERNEL && MMU

	help

	  Enable this to turn on TLB sanity check on each entry to userspace.

	  This check can spot missing TLB invalidation/wrong PTE permissions/
@@ -14,7 +14,7 @@ config DEBUG_TLB_SANITY 


config LD_NO_RELAX

	bool "Disable linker relaxation"

	default n

	default y

	help

	  Enable this function to disable link-time optimizations.

	  The default linker behavior is to combine identical literal

arch/xtensa/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -35,7 +35,6 @@ endif 


platform-$(CONFIG_XTENSA_PLATFORM_XT2000)	:= xt2000

platform-$(CONFIG_XTENSA_PLATFORM_ISS)		:= iss

platform-$(CONFIG_XTENSA_PLATFORM_S6105)	:= s6105

platform-$(CONFIG_XTENSA_PLATFORM_XTFPGA)	:= xtfpga



PLATFORM = $(platform-y)

arch/xtensa/boot/boot-elf/boot.lds.S

+2 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ SECTIONS 
		__bss_end = .;

	}



#ifdef CONFIG_MMU

	/*

	 * This is a remapped copy of the Reset Vector Code.

	 * It keeps gdb in sync with the PC after switching
@@ -51,4 +52,5 @@ SECTIONS 
	{

		*(.ResetVector.remapped_text)

	}

#endif

}

arch/xtensa/boot/boot-elf/bootstrap.S

+4 −6
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <asm/page.h>

#include <asm/cacheasm.h>

#include <asm/initialize_mmu.h>

#include <asm/vectors.h>

#include <linux/linkage.h>



	.section	.ResetVector.text, "ax"
@@ -34,12 +35,7 @@ _ResetVector: 


	.align 4

RomInitAddr:

#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \

	XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY

	.word 0x00003000

#else

	.word 0xd0003000

#endif

	.word	LOAD_MEMORY_ADDRESS

RomBootParam:

	.word _bootparam

_bootparam:
@@ -79,6 +75,7 @@ reset: 
	movi	a4, 0

	jx      a0



#ifdef CONFIG_MMU

	.align 4



	.section	.ResetVector.remapped_text, "x"
@@ -102,3 +99,4 @@ _RemappedSetupMMU: 
#endif



	.end    no-absolute-literals

#endif