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2010-08-04microblaze: Implement clear_ums macro and fix SAVE_STATE macroMichal Simek
VMS is always setup because VM mode was before exception/syscall/interrupt. Kernel continues in kernel mode that's why we have to clear UMS bit if kernel comes from user space. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Remove additional setup for kernel_modeMichal Simek
PT_MODE stores information if kernel comes from user or kernel space. If come from user space, PT_MODE contains 0. If come from kernel store, PT_MODE contains non zero value. We don't need to save value 1. I am using r1 register which contains non zero value. This change save one additional instruction. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Optimize SAVE_STATE macroMichal Simek
SAVE_STATE macro could be used for user_exception or interrupt functions. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Remove additional loadingMichal Simek
We don't need to save r0 to PT_R0. It could be additional operation. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Completely remove working with R11 registerMichal Simek
We don't need to save R11 register. There is easy way to use only R1 which is saved and restore later. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Do not setup BIP in _debug_exceptionMichal Simek
BIP is already setup. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Simplify _debug_exception functionMichal Simek
Keep together all arguments for send_sig function. Move returning address to delay slot which is executed. Remove additional send_sig loading. I am using IMM part of rtbd instruction with r0. old solution: addik r11, r0, send_sig rtbd r11, 0 nop new solution: rtbd r0, send_sig nop There is one instruction saving. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Optimize SAVE_STATE macroMichal Simek
It is necessary to setup BIP and EE and clear EIP only for unaligned exception handler. The rest of hw exception handlers don't require it. HW exception occured and we are not in virtual mode. That's why we can do operations protected by EIP. Interrupt, next hw exception or syscall can't occur. EIP is cleared by rted. This change speedup page_fault hw exception handler which is critical path. There is also necessary to save R11 content before flag setup for unaligned exception. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: trivial: Use la insted of addikMichal Simek
la is translated to addik by toolchain. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: remove enable_irq from SAVE_STATE macroMichal Simek
SAVE_STATE macro is used in hw exceptions high level handling functions. Hw exception doesn't disable IRQ that's why we don't need to reenable it. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Move stack backup to SAVE_STATE macroMichal Simek
Remove code duplicity and move it to SAVE_STATE macro. There is no impact on performance. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Move BIP setup to the end of ret_from_trap/ret_from_excMichal Simek
We don't need to protect by BIP whole ret_from_trap/ret_from_exc code. Only restoring from user/hw exception should be covered. If BIP is setup, IRQ can't occur. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Remove PER_CPU(KM) variableMichal Simek
There is a way howto remove Kernel Mode variable. It is easier to parse UMS bit in MSR to find out if I come from kernel or user space. Loading MSR content should be in one cycle and loading PER_CPU variable depends on memory state. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Optimize clear_vms_ums macroMichal Simek
We can save two instruction when MSR_VMS and MSR_UMS are setup in one instruction. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Save and restore r3/r4 in SAVE/RESTORE_REGS macrosMichal Simek
Save and restore R3/R4 registers in macros. This change help to cleanup entry.S. In ret_from_trap function we are saving returning value from syscall to pt_regs on stack that's why we don't need to save and restore these values before kernel functions (schedule, do_signal). Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Fix VM_ON and VM_OFF macrosMichal Simek
Jump behind macro. We don't want to execute nop instruction again. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Do not use _start in vmlinuxMichal Simek
_start symbol stores physical address where kernel is. Gdb uses this symbol for their purpose that's why we have to rename it. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Cleanup boot/MakefileMichal Simek
Remove spaces and use tabs instead. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Fix number of pvr regsMichal Simek
Microblaze has only 11 pvr regs according manual. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Decrease time shifting valuesMichal Simek
Lower shifting values ensure that shifted 32bit counter value doesn't exceed 64bit cycle variable too fast. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Enable early printk only for uartliteMichal Simek
Microblaze has support for early printk. The second serial driver (uart16550/8250) has no microblaze support for early printk. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: remove unused HAVE_ARCH_PCI_SET_DMA_MASKFUJITA Tomonori
HAVE_ARCH_PCI_SET_DMA_MASK was removed in 2.6.34 (no architecture has the own implementation of pci_set_dma_mask). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Do not trace cpu_relax functionMichal Simek
IRQsoff tracer requires to protect cpu_idle function to get correct timing report. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Improve ftrace time measuringMichal Simek
I had to comment sched_clock generic function because of broken toolchain. It is fine grain timing. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Add stack unwinderSteven J. Magnani
Implement intelligent backtracing by searching for stack frame creation, and emitting only return addresses. Use print_hex_dump() to display the entire binary kernel stack. Limitation: MMU kernels are not currently able to trace beyond a system trap (interrupt, syscall, etc.). It is the intent of this patch to provide infrastructure that can be extended to add this capability later. Changes from V1: * Removed checks in find_frame_creation() that prevented location of the frame creation instruction in heavily optimized code * Various formatting/commenting/file location tweaks per review comments * Dropped Kconfig option to enable STACKTRACE as something logically separate Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
2010-08-04microblaze: Allow PAGE_SIZE configurationSteven J. Magnani
Allow developer to configure memory page size at compile time. Larger pages can improve performance on some workloads. Based on PowerPC code. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Trace hardirqsMichal Simek
Add trace_hardirqs_off and trace_hardirqs_on to do_IRQ function. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Fix sys_clone syscallMichal Simek
sys_clone syscall ignored args which this patch mapped to args which are passing from glibc. Here is the origin problem description. "I ran the static libgcc tests (very few of them are there, they are mostly dynamically linked) and some of them fail with an assertion in fork() system call (tid != pid), I looked at the microblaze/entry.S file and it looks suspicious (ignores arguments 3-5)" Arg mapping should be: glibc ARCH_FORK(...) -> do_fork(...) r5 -> r5 (clone_flags) r6 -> r6 (stack_start, use parent->stack if NULL) pt_regs -> r7 (pt_regs) r7 -> r8 (stack_size) r8 -> r9 (parent_tidptr) r9 -> r10 (child_tidptr) Signed-off-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Disable FRAME_POINTER selectionMichal Simek
Microblaze doesn't support frame pointers. Ftrace code uses CALLER_ADDR1 which is defined in linux/ftrace.h. For Microblaze is 0. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Fix copy_to_user_page macroMichal Simek
copy_to_user_page macro is used in mm/memory.c:access_process_vm function. This function is called from ptrace code (POKETEXT, POKEDATA) which write data to memory. Microblaze handle physical address for caches that's why there is virt_to_phys conversion. There is potential one location which can caused the problem on WB system. The important is take a look at write PTRACEs requests (POKE/TEXT, DATA, USR). Note: Majority of Microblaze PTRACE code is moved to generic location in newer kernel version that's why this solution should work on the newest kernel version too. linux/io.h is in cacheflush because of mm/nommu.c Tested on a WB system - hello world debugging. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Sync noMMU and MMU setup_memoryMichal Simek
Both versions can use the same node to register NODE_DATA(0) Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Remove unused labelMichal Simek
The label should be remove by 21e1c93631e027136ea4070e7bca600c4ad4f391 Warning message: arch/microblaze/mm/fault.c: In function 'do_page_fault': arch/microblaze/mm/fault.c:229: warning: label 'survive' defined but not used Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04microblaze: Implement flush_dcache_page macroMichal Simek
flush_dcache_page macro is necessary to implement for JFFS2 rootfs support on WB system. Signed-off-by: Michal Simek <monstr@monstr.eu>
2010-08-04ARM: mach-shmobile: Fix up ap4evb build for LCDC merge damage.Paul Mundt
The merge of the LCDC patches chomped a trailing , from the device list, add it back in. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: clock-sh7372: modify clock name for FSI2Kuninori Morimoto
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: add HDMI support to the ap4evb boardGuennadi Liakhovetski
Support HDMI in 720p mode. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04fbdev: sh-mobile: HDMI support for SH-Mobile SoCsGuennadi Liakhovetski
Some SH-Mobile SoCs have an HDMI controller and a PHY, attached to one of their LCDC interfaces. This patch adds a preliminary static support for such controllers, this means, that only the 720p mode is handled ATM. Support for more modes and a dynamic switching between them will be added by a follow up patch. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04sh: add a parameter to LCDC driver's .display_on() callbackGuennadi Liakhovetski
HDMI support for the sh_mobile_lcdc framebuffer driver will require a 'struct fb_info *' pointer for its .display_on() callback. While at it fix kfr2r09 framebuffer modular build. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: extend clock definitions on sh7372Guennadi Liakhovetski
Add definitions for DV_CLKI and HDMI clocks, extend support for PLLC2 and some other clocks. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04sh: add a reparent function to DIV6 clocksGuennadi Liakhovetski
Add support for reparenting of div6 clocks on SuperH and SH-Mobile SoCs. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04sh: add a list of parent configurations to struct clkGuennadi Liakhovetski
Many system clocks can select a parent by writing a value to a specific field in the configuration register. Add a list of parents and location and width of the source selection field in the clock configuration register to struct clk to assist in clk_set_parent() implementation. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: ap4evb: Add ts_get_pendown_state for tsc2007Kuninori Morimoto
This function is necessary to ensure the detection of pen-down. This patch support both QHD / WVGA pannel. Tested-by: Tony SIM <chinyeow.sim.xt@renesas.com> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04fbdev: sh-mobile-lcdc: fix potential Oops in SH-Mobile LCDC framebuffer driverGuennadi Liakhovetski
sh_mobile_lcdc_setup_clocks() can perform IO, therefore it has to be called after ioremap(). Also check return code of ioremap() and use resource_size() instead of open-coding it. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04net/irda/sh_irda: Modify clk_get lookupsKuninori Morimoto
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: fix typos in sh7372 clock definitionsGuennadi Liakhovetski
Reported-by: Magnus Damm <damm@opensource.se> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: fix EXTAL1 frequency on sh7372Guennadi Liakhovetski
EXTAL1 is clocked at 26.0MHz Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: add GPIO definitions for switching between LCDC0 and LCDC1Guennadi Liakhovetski
With these defines now it is possible to use gpio_request(GPIO_FN_LCDC1_SELECT, NULL) or ...LCDC0... respectively to switch between the two LCDC instances. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04ARM: mach-shmobile: ap4evb: Add LCD panel selectionKuninori Morimoto
On AP4EVB board, it is possible to select LCD panel type which are parallel or MIPI by SW3, SW43 dip-switch. This patch add parallel LCD settings and select menu to Kconfig. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-08-04Merge branch 'for_2.6.36' of git://git.pwsan.com/linux-2.6 into omap-for-linusTony Lindgren
2010-08-04ALSA: als4000: enable burst modeOndrej Zary
Enable burst mode to prevent dropouts during high PCI bus usage. The card is useless in X without this because of dropouts when anything moves on the screen (at least with PCI VGA card). Enabling this is also recommended by the datasheet (page 48). Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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