Commit bdab2250 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-mn10300 

* git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-2.6-mn10300: (44 commits)
  MN10300: Save frame pointer in thread_info struct rather than global var
  MN10300: Change "Matsushita" to "Panasonic".
  MN10300: Create a defconfig for the ASB2364 board
  MN10300: Update the ASB2303 defconfig
  MN10300: ASB2364: Add support for SMSC911X and SMC911X
  MN10300: ASB2364: Handle the IRQ multiplexer in the FPGA
  MN10300: Generic time support
  MN10300: Specify an ELF HWCAP flag for MN10300 Atomic Operations Unit support
  MN10300: Map userspace atomic op regs as a vmalloc page
  MN10300: And Panasonic AM34 subarch and implement SMP
  MN10300: Delete idle_timestamp from irq_cpustat_t
  MN10300: Make various interrupt priority settings configurable
  MN10300: Optimise do_csum()
  MN10300: Implement atomic ops using atomic ops unit
  MN10300: Make the FPU operate in non-lazy mode under SMP
  MN10300: SMP TLB flushing
  MN10300: Use the [ID]PTEL2 registers rather than [ID]PTEL for TLB control
  MN10300: Make the use of PIDR to mark TLB entries controllable
  MN10300: Rename __flush_tlb*() to local_flush_tlb*()
  MN10300: AM34 erratum requires MMUCTR read and write on exception entry
  ...
parents 7c5814c7 7c7fcf76

Kbuild

+1 −1
Original line number Diff line number Diff line
@@ -53,7 +53,7 @@ targets += arch/$(SRCARCH)/kernel/asm-offsets.s 
# Default sed regexp - multiline due to syntax constraints

define sed-y

	"/^->/{s:->#\(.*\):/* \1 */:; \

	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 (\2) /* \3 */:; \

	s:^->\([^ ]*\) [\$$#]*\([-0-9]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; \

	s:->::; p;}"

endef

MAINTAINERS

+1 −1
Original line number Diff line number Diff line
@@ -4448,7 +4448,7 @@ L: platform-driver-x86@vger.kernel.org 
S:	Maintained

F:	drivers/platform/x86/panasonic-laptop.c



PANASONIC MN10300/AM33 PORT

PANASONIC MN10300/AM33/AM34 PORT

M:	David Howells <dhowells@redhat.com>

M:	Koichi Yasutake <yasutake.koichi@jp.panasonic.com>

L:	linux-am33-list@redhat.com (moderated for non-subscribers)

arch/mn10300/Kconfig

+219 −60
Original line number Diff line number Diff line
@@ -9,8 +9,19 @@ config MN10300 
	def_bool y

	select HAVE_OPROFILE



config AM33

	def_bool y

config AM33_2

	def_bool n



config AM33_3

	def_bool n



config AM34_2

	def_bool n

	select MN10300_HAS_ATOMIC_OPS_UNIT

	select MN10300_HAS_CACHE_SNOOP



config ERRATUM_NEED_TO_RELOAD_MMUCTR

	def_bool y if AM33_3 || AM34_2



config MMU

	def_bool y
@@ -37,7 +48,7 @@ config GENERIC_CALIBRATE_DELAY 
	def_bool y



config GENERIC_CMOS_UPDATE

        def_bool y

        def_bool n



config GENERIC_FIND_NEXT_BIT

	def_bool y
@@ -45,6 +56,27 @@ config GENERIC_FIND_NEXT_BIT 
config GENERIC_HWEIGHT

	def_bool y



config GENERIC_TIME

	def_bool y



config GENERIC_CLOCKEVENTS

	def_bool y



config GENERIC_CLOCKEVENTS_BUILD

	def_bool y

	depends on GENERIC_CLOCKEVENTS



config GENERIC_CLOCKEVENTS_BROADCAST

	bool



config CEVT_MN10300

       def_bool y

       depends on GENERIC_CLOCKEVENTS



config CSRC_MN10300

       def_bool y

       depends on GENERIC_TIME



config GENERIC_BUG

	def_bool y
@@ -61,18 +93,14 @@ config GENERIC_HARDIRQS 
config HOTPLUG_CPU

	def_bool n



config HZ

	int

	default 1000



mainmenu "Matsushita MN10300/AM33 Kernel Configuration"

mainmenu "Panasonic MN10300/AM33 Kernel Configuration"



source "init/Kconfig"



source "kernel/Kconfig.freezer"





menu "Matsushita MN10300 system setup"

menu "Panasonic MN10300 system setup"



choice

	prompt "Unit type"
@@ -87,6 +115,10 @@ config MN10300_UNIT_ASB2303 
config MN10300_UNIT_ASB2305

	bool "ASB2305"



config MN10300_UNIT_ASB2364

	bool "ASB2364"

	select SMSC911X_ARCH_HOOKS if SMSC911X



endchoice



choice
@@ -99,57 +131,51 @@ choice 
config MN10300_PROC_MN103E010

	bool "MN103E010"

	depends on MN10300_UNIT_ASB2303 || MN10300_UNIT_ASB2305

	select AM33_2

	select MN10300_PROC_HAS_TTYSM0

	select MN10300_PROC_HAS_TTYSM1

	select MN10300_PROC_HAS_TTYSM2



config MN10300_PROC_MN2WS0050

	bool "MN2WS0050"

	depends on MN10300_UNIT_ASB2364

	select AM34_2

	select MN10300_PROC_HAS_TTYSM0

	select MN10300_PROC_HAS_TTYSM1

	select MN10300_PROC_HAS_TTYSM2



endchoice



choice

	prompt "Processor core support"

	default MN10300_CPU_AM33V2

config MN10300_HAS_ATOMIC_OPS_UNIT

	def_bool n

	help

	  This option specifies the processor core for which the kernel will be

	  compiled. It affects the instruction set used.



config MN10300_CPU_AM33V2

	bool "AM33v2"



endchoice

	  This should be enabled if the processor has an atomic ops unit

	  capable of doing LL/SC equivalent operations.



config FPU

	bool "FPU present"

	default y

	depends on MN10300_PROC_MN103E010

	depends on MN10300_PROC_MN103E010 || MN10300_PROC_MN2WS0050



choice

	prompt "CPU Caching mode"

	default MN10300_CACHE_WBACK

config LAZY_SAVE_FPU

	bool "Save FPU state lazily"

	default y

	depends on FPU && !SMP

	help

	  This option determines the caching mode for the kernel.



	  Write-Back caching mode involves the all reads and writes causing

	  the affected cacheline to be read into the cache first before being

	  operated upon. Memory is not then updated by a write until the cache

	  is filled and a cacheline needs to be displaced from the cache to

	  make room. Only at that point is it written back.

	  Enable this to be lazy in the saving of the FPU state to the owning

	  task's thread struct.  This is useful if most tasks on the system

	  don't use the FPU as only those tasks that use it will pass it

	  between them, and the state needn't be saved for a task that isn't

	  using it.



	  Write-Through caching only fetches cachelines from memory on a

	  read. Writes always get written directly to memory. If the affected

	  cacheline is also in cache, it will be updated too.

	  This can't be so easily used on SMP as the process that owns the FPU

	  state on a CPU may be currently running on another CPU, so for the

	  moment, it is disabled.



	  The final option is to turn of caching entirely.

source "arch/mn10300/mm/Kconfig.cache"



config MN10300_CACHE_WBACK

	bool "Write-Back"



config MN10300_CACHE_WTHRU

	bool "Write-Through"



config MN10300_CACHE_DISABLED

	bool "Disabled"



endchoice

config MN10300_TLB_USE_PIDR

	def_bool y



menu "Memory layout options"
@@ -170,24 +196,55 @@ config KERNEL_TEXT_ADDRESS 


config KERNEL_ZIMAGE_BASE_ADDRESS

	hex "Base address of compressed vmlinux image"

	default "0x90700000"

	default "0x50700000"



config BOOT_STACK_OFFSET

	hex

	default	"0xF00"	if SMP

	default	"0xFF0" if !SMP



config BOOT_STACK_SIZE

	hex

	depends on SMP

	default	"0x100"

endmenu



config PREEMPT

	bool "Preemptible Kernel"

	help

	  This option reduces the latency of the kernel when reacting to

	  real-time or interactive events by allowing a low priority process to

	  be preempted even if it is in kernel mode executing a system call.

	  This allows applications to run more reliably even when the system is

	  under load.

config SMP

	bool "Symmetric multi-processing support"

	default y

	depends on MN10300_PROC_MN2WS0038 || MN10300_PROC_MN2WS0050

	---help---

	  This enables support for systems with more than one CPU. If you have

	  a system with only one CPU, like most personal computers, say N. If

	  you have a system with more than one CPU, say Y.



	  If you say N here, the kernel will run on single and multiprocessor

	  machines, but will use only one CPU of a multiprocessor machine. If

	  you say Y here, the kernel will run on many, but not all,

	  singleprocessor machines. On a singleprocessor machine, the kernel

	  will run faster if you say N here.



	  Say Y here if you are building a kernel for a desktop, embedded

	  or real-time system.  Say N if you are unsure.

	  See also <file:Documentation/i386/IO-APIC.txt>,

	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at

	  <http://www.tldp.org/docs.html#howto>.



	  If you don't know what to do here, say N.



config NR_CPUS

	int

	depends on SMP

	default "2"



config USE_GENERIC_SMP_HELPERS

	bool

	depends on SMP

	default y



source "kernel/Kconfig.preempt"



config MN10300_CURRENT_IN_E2

	bool "Hold current task address in E2 register"

	depends on !SMP

	default y

	help

	  This option removes the E2/R2 register from the set available to gcc
@@ -209,12 +266,15 @@ config MN10300_USING_JTAG 
	  suppresses the use of certain hardware debugging features, such as

	  single-stepping, which are taken over completely by the JTAG unit.



source "kernel/Kconfig.hz"

source "kernel/time/Kconfig"



config MN10300_RTC

	bool "Using MN10300 RTC"

	depends on MN10300_PROC_MN103E010

	depends on MN10300_PROC_MN103E010 || MN10300_PROC_MN2WS0050

	select GENERIC_CMOS_UPDATE

	default n

	help



	  This option enables support for the RTC, thus enabling time to be

	  tracked, even when system is powered down. This is available on-chip

	  on the MN103E010.
@@ -306,14 +366,23 @@ config MN10300_TTYSM1 


choice

	prompt "Select the timer to supply the clock for SIF1"

	default MN10300_TTYSM0_TIMER9

	default MN10300_TTYSM1_TIMER12 \

		if !(AM33_2 || AM33_3)

	default MN10300_TTYSM1_TIMER9 \

		if AM33_2 || AM33_3

	depends on MN10300_TTYSM1



config MN10300_TTYSM1_TIMER12

	bool "Use timer 12 (16-bit)"

	depends on !(AM33_2 || AM33_3)



config MN10300_TTYSM1_TIMER9

	bool "Use timer 9 (16-bit)"

	depends on AM33_2 || AM33_3



config MN10300_TTYSM1_TIMER3

	bool "Use timer 3 (8-bit)"

	depends on AM33_2 || AM33_3



endchoice
@@ -328,17 +397,107 @@ config MN10300_TTYSM2 


choice

	prompt "Select the timer to supply the clock for SIF2"

	default MN10300_TTYSM0_TIMER10

	default MN10300_TTYSM2_TIMER3 \

		if !(AM33_2 || AM33_3)

	default MN10300_TTYSM2_TIMER10 \

		if AM33_2 || AM33_3

	depends on MN10300_TTYSM2



config MN10300_TTYSM2_TIMER9

	bool "Use timer 9 (16-bit)"

	depends on !(AM33_2 || AM33_3)



config MN10300_TTYSM2_TIMER1

	bool "Use timer 1 (8-bit)"

	depends on !(AM33_2 || AM33_3)



config MN10300_TTYSM2_TIMER3

	bool "Use timer 3 (8-bit)"

	depends on !(AM33_2 || AM33_3)



config MN10300_TTYSM2_TIMER10

	bool "Use timer 10 (16-bit)"

	depends on AM33_2 || AM33_3



endchoice



config MN10300_TTYSM2_CTS

	bool "Enable the use of the CTS line /dev/ttySM2"

	depends on MN10300_TTYSM2

	depends on MN10300_TTYSM2 && AM33_2



endmenu



menu "Interrupt request priority options"



comment "[!] NOTE: A lower number/level indicates a higher priority (0 is highest, 6 is lowest)"



comment "____Non-maskable interrupt levels____"

comment "The following must be set to a higher priority than local_irq_disable() and on-chip serial"



config GDBSTUB_IRQ_LEVEL

	int "GDBSTUB interrupt priority"

	depends on GDBSTUB

	range 0 1 if LINUX_CLI_LEVEL = 2

	range 0 2 if LINUX_CLI_LEVEL = 3

	range 0 3 if LINUX_CLI_LEVEL = 4

	range 0 4 if LINUX_CLI_LEVEL = 5

	range 0 5 if LINUX_CLI_LEVEL = 6

	default 0



comment "The following must be set to a higher priority than local_irq_disable()"



config MN10300_SERIAL_IRQ_LEVEL

	int "MN10300 on-chip serial interrupt priority"

	depends on MN10300_TTYSM

	range 1 1 if LINUX_CLI_LEVEL = 2

	range 1 2 if LINUX_CLI_LEVEL = 3

	range 1 3 if LINUX_CLI_LEVEL = 4

	range 1 4 if LINUX_CLI_LEVEL = 5

	range 1 5 if LINUX_CLI_LEVEL = 6

	default 1



comment "-"

comment "____Maskable interrupt levels____"



config LINUX_CLI_LEVEL

	int "The highest interrupt priority excluded by local_irq_disable() (2-6)"

	range 2 6

	default 2

	help

	  local_irq_disable() doesn't actually disable maskable interrupts -

	  what it does is restrict the levels of interrupt which are permitted

	  (a lower level indicates a higher priority) by lowering the value in

	  EPSW.IM from 7.  Any interrupt is permitted for which the level is

	  lower than EPSW.IM.



	  Certain interrupts, such as GDBSTUB and virtual MN10300 on-chip

	  serial DMA interrupts are allowed to interrupt normal disabled

	  sections.



comment "The following must be set to a equal to or lower priority than LINUX_CLI_LEVEL"



config TIMER_IRQ_LEVEL

	int "Kernel timer interrupt priority"

	range LINUX_CLI_LEVEL 6

	default 4



config PCI_IRQ_LEVEL

	int "PCI interrupt priority"

	depends on PCI

	range LINUX_CLI_LEVEL 6

	default 5



config ETHERNET_IRQ_LEVEL

	int "Ethernet interrupt priority"

	depends on SMC91X || SMC911X || SMSC911X

	range LINUX_CLI_LEVEL 6

	default 6



config EXT_SERIAL_IRQ_LEVEL

	int "External serial port interrupt priority"

	depends on SERIAL_8250

	range LINUX_CLI_LEVEL 6

	default 6



endmenu

arch/mn10300/Makefile

+6 −0
Original line number Diff line number Diff line
@@ -36,6 +36,9 @@ endif 
ifeq ($(CONFIG_MN10300_PROC_MN103E010),y)

PROCESSOR	:= mn103e010

endif

ifeq ($(CONFIG_MN10300_PROC_MN2WS0050),y)

PROCESSOR	:= mn2ws0050

endif



ifeq ($(CONFIG_MN10300_UNIT_ASB2303),y)

UNIT		:= asb2303
@@ -43,6 +46,9 @@ endif 
ifeq ($(CONFIG_MN10300_UNIT_ASB2305),y)

UNIT		:= asb2305

endif

ifeq ($(CONFIG_MN10300_UNIT_ASB2364),y)

UNIT		:= asb2364

endif





head-y		:= arch/mn10300/kernel/head.o arch/mn10300/kernel/init_task.o

arch/mn10300/boot/compressed/head.S

+67 −2
Original line number Diff line number Diff line
@@ -14,10 +14,29 @@ 


#include <linux/linkage.h>

#include <asm/cpu-regs.h>

#include <asm/cache.h>

#ifdef CONFIG_SMP

#include <proc/smp-regs.h>

#endif



	.globl startup_32

startup_32:

	# first save off parameters from bootloader

#ifdef CONFIG_SMP

	#

	# Secondary CPUs jump directly to the kernel entry point

	#

	# Must save primary CPU's D0-D2 registers as they hold boot parameters

	#

	mov	(CPUID), d3

	and	CPUID_MASK,d3

	beq	startup_primary

	mov	CONFIG_KERNEL_TEXT_ADDRESS,a0

	jmp	(a0)



startup_primary:

#endif /* CONFIG_SMP */



	# first save parameters from bootloader

	mov	param_save_area,a0

	mov	d0,(a0)

	mov	d1,(4,a0)
@@ -37,8 +56,15 @@ startup_32: 
	mov	(a0),d0

	btst	CHCTR_ICBUSY|CHCTR_DCBUSY,d0		# wait till not busy

	lne

	mov	CHCTR_ICEN|CHCTR_DCEN|CHCTR_DCWTMD,d0	# writethru dcache



#ifdef CONFIG_MN10300_CACHE_ENABLED

#ifdef CONFIG_MN10300_CACHE_WBACK

	mov	CHCTR_ICEN|CHCTR_DCEN|CHCTR_DCWTMD_WRBACK,d0

#else

	mov	CHCTR_ICEN|CHCTR_DCEN|CHCTR_DCWTMD_WRTHROUGH,d0

#endif /* WBACK */

	movhu	d0,(a0)					# enable

#endif /* !ENABLED */



	# clear the BSS area

	mov	__bss_start,a0
@@ -54,6 +80,9 @@ bssclear_end: 


	# decompress the kernel

	call	decompress_kernel[],0

#ifdef CONFIG_MN10300_CACHE_WBACK

	call	mn10300_dcache_flush_inv[],0

#endif



	# disable caches again

	mov	CHCTR,a0
@@ -69,10 +98,46 @@ bssclear_end: 
	mov	(4,a0),d1

	mov	(8,a0),d2



	# jump to the kernel proper entry point

	mov	a3,sp

	mov	CONFIG_KERNEL_TEXT_ADDRESS,a0

	jmp	(a0)





###############################################################################

#

# Cache flush routines

#

###############################################################################

#ifdef CONFIG_MN10300_CACHE_WBACK

mn10300_dcache_flush_inv:

	movhu	(CHCTR),d0

	btst	CHCTR_DCEN,d0

	beq	mn10300_dcache_flush_inv_end



	mov	L1_CACHE_NENTRIES,d1

	clr	a1



mn10300_dcache_flush_inv_loop:

	mov	(DCACHE_PURGE_WAY0(0),a1),d0	# unconditional purge

	mov	(DCACHE_PURGE_WAY1(0),a1),d0	# unconditional purge

	mov	(DCACHE_PURGE_WAY2(0),a1),d0	# unconditional purge

	mov	(DCACHE_PURGE_WAY3(0),a1),d0	# unconditional purge



	add	L1_CACHE_BYTES,a1

	add	-1,d1

	bne	mn10300_dcache_flush_inv_loop



mn10300_dcache_flush_inv_end:

	ret	[],0

#endif /* CONFIG_MN10300_CACHE_WBACK */





###############################################################################

#

# Data areas

#

###############################################################################

	.data

	.align		4

param_save_area:

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