- Mar 07, 2013
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Dongjin Kim authored
Add initial DT for Hardkernel's ODROID-X board based on EXYNOS4412 SoC. This patch including adds the node to support fixed voltage for peripherals like LED, ethernet controller, and this patch adds GPIO connected LEDS on ODROID-X board and configure its properties like following: LED1: use 'heartbeat' trigger, blinking while the board is running. LED2: use 'mmc0' trigger, on when mmc0 is accessing. And adds the device node to support eMMC storage on SDCARD4 ports, controlled by MSHC. Signed-off-by: Dongjin Kim <tobetter@gmail.com> Acked-by: Olof Johansson <olof@lixom.net> [kgene.kim@samsung.com: squashed into one commit as per Olof's comment] Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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Thomas Abraham authored
Add a minimal board dts file for EXYNOS4412 based Insignal Origen board. Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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- Mar 05, 2013
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Kukjin Kim authored
remove duplicated compatible Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
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- Mar 03, 2013
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James Hogan authored
metag/allmodconfig: drivers/media/v4l2-core/videobuf2-dma-contig.c: In function 'vb2_dc_get_base_sgt': drivers/media/v4l2-core/videobuf2-dma-contig.c:387: error: implicit declaration of function 'dma_get_sgtable' For architectures using dma_map_ops, dma_get_sgtable() is provided in <asm-generic/dma-mapping-common.h>. Metag does not use dma_map_ops yet, hence it should implement it as an inline stub using dma_common_get_sgtable(). Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
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James Hogan authored
Metag doesn't have a metag_dt_memblock_reserve() function so remove the declaration from asm/prom.h. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Make a copy of the device tree blob in non-init memory. It is required when using built-in device tree files that the platform code copies the blob to non-init memory prior to calling unflatten_device_tree(), otherwise the strings that the device tree refer to will get poisoned and potentially reused, breaking later reading of the device tree post-init (such as compatible matching in modules, debugfs, and the procfs interface). Signed-off-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Vineet Gupta <vgupta@synopsys.com>
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James Hogan authored
Minimise metag_ksyms.c includes to directly include the <asm/*.h> files that declare a particular symbol, and not include any unnecessary ones. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in mm/init.c into mm/init.c. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in usercopy.c into usercopy.c Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in setup.c into setup.c Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in kick.c into kick.c Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
It's less error prone to have function symbols exported immediately after the function rather than in metag_ksyms.c. Move each EXPORT_SYMBOL in metag_ksyms.c for symbols defined in traps.c into traps.c Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
The SMP version of arch_local_irq_enable() uses preempt_disable(), but <asm/irqflags.h> doesn't include <linux/preempt.h> causing the following errors on SMP when pstore/ftrace is enabled (caught by buildbot smp allyesconfig): In file included from include/linux/irqflags.h:15, from fs/pstore/ftrace.c:16: arch/metag/include/asm/irqflags.h: In function 'arch_local_irq_enable': arch/metag/include/asm/irqflags.h:84: error: implicit declaration of function 'preempt_disable' arch/metag/include/asm/irqflags.h:86: error: implicit declaration of function 'preempt_enable_no_resched' However <linux/preempt.h> cannot be easily included from <asm/irqflags.h> as it can cause circular include dependencies in the !SMP case, and potentially in the SMP case in the future. Therefore move the SMP implementation of arch_local_irq_enable() into traps.c and use an inline version of get_trigger_mask() which is also defined in traps.c for SMP. This adds an extra layer of function call / stack push when preempt_disable needs to call other functions, however in the non-preemptive SMP case it should be about as fast, as it was already calling the get_trigger_mask() function which is now used inline. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Convert hugetlb_get_unmapped_area_new_pmd() to use vm_unmapped_area() rather than searching the virtual address space itself. This fixes the following errors in linux-next due to the specified members being removed after other architectures have already been converted: arch/metag/mm/hugetlbpage.c: In function 'hugetlb_get_unmapped_area_new_pmd': arch/metag/mm/hugetlbpage.c:199: error: 'struct mm_struct' has no member named 'cached_hole_size' arch/metag/mm/hugetlbpage.c:200: error: 'struct mm_struct' has no member named 'free_area_cache' arch/metag/mm/hugetlbpage.c:215: error: 'struct mm_struct' has no member named 'cached_hole_size' Signed-off-by: James Hogan <james.hogan@imgtec.com> Acked-by: Michel Lespinasse <walken@google.com>
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James Hogan authored
Various file systems use clear_page() and copy_page(), so when they're built as modules we get build errors like the following: ERROR: "clear_page" [fs/ntfs/ntfs.ko] undefined! ERROR: "copy_page" [fs/nilfs2/nilfs2.ko] undefined! Therefore export these functions to modules from metag_ksyms.c to fix the errors. This was hit by a randconfig build. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Various file systems indirectly use metag_code_cache_flush_all(), so when they're built as modules we get build errors like the following: ERROR: "metag_code_cache_flush_all" [fs/xfs/xfs.ko] undefined! Therefore export this function to modules to fix the errors. This was hit by a randconfig build. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Rename setup_txprivext() to setup_priv() and add initialisation of some more per-thread privilege protection registers: - TxPRIVSYSR: 0x04400000-0x047fffff 0x05000000-0x07ffffff 0x84000000-0x87ffffff - TxPIOREG: 0x02000000-0x02ffffff 0x04800000-0x048fffff - TxSYREG: 0x04000000-0x04000fff (except write fetch system event) Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Define PRIV_BITS using explicit constants from <asm/metag_regs.h> rather than with a hard coded value. This also adds a couple of missing definitions for the TXPRIVEXT priv bits for protecting writes to TXTIMER and the trace registers. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Sort includes in kernel/setup.c. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add boot time check for whether LNKGET/LNKSET go through or around the cache. Depending on the configuration an info message (no harm), warning (technically wrong but no harm), or big WARN (expect failure in either kernel or userland) may be emitted if the behaviour is not as expected: Configuration Hardware Response ------------------------------------------ -------- -------- AROUND_CACHE through pr_info !AROUND_CACHE && ATOMICITY_LNKGET around WARN (kernel) " && !ATOMICITY_LNKGET && SMP around WARN (user) " " && !SMP around pr_warn Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
metag_cache_probe() is only called from setup_arch(), so add the __init attribute to it. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add basic JTAG Debug Adapter (DA) support so that drivers which communicate with the DA can detect whether one is actually present (otherwise the target will halt indefinitely). This allows the metag_da TTY driver and imgdafs filesystem driver to be built, updates defconfigs, and sets up the metag_da console early if it's configured in. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add ftrace support for metag. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
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James Hogan authored
Add Perf support for metag. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
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James Hogan authored
Add metag build infrastructure. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add the remaining metag header files: - byteorder.h, swab.h (byte order and swapping) - barrier.h, cpu.h. hwthread.h, processor.h (hardware thread related) - bug.h, elf.h, gpio.h, linkage.h, resource.h (other) Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add stack unwinding support for metag. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add optimised library functions for metag. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add DMA mapping code. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add SMP support for metag. This allows Linux to take control of multiple hardware threads on a single Meta core, treating them as separate Linux CPUs. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add header files to implement Meta hardware thread locks (used by some other atomic operations), atomics, spinlocks, and bitops. There are 2 main types of atomic primitives for metag (in addition to IRQs off on UP): - LOCK instructions provide locking between hardware threads. - LNKGET/LNKSET instructions provide load-linked/store-conditional operations allowing for lighter weight atomics on Meta2 LOCK instructions allow for hardware threads to acquire voluntary or exclusive hardware thread locks: - LOCK0 releases exclusive and voluntary lock from the running hardware thread. - LOCK1 acquires the voluntary hardware lock, blocking until it becomes available. - LOCK2 implies LOCK1, and additionally acquires the exclusive hardware lock, blocking all other hardware threads from executing. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add metag system call and gateway page interfaces. The metag architecture port uses the generic system call numbers from asm-generic/unistd.h, as well as a user gateway page mapped at 0x6ffff000 which contains fast atomic primitives (depending on SMP) and a fast method of accessing TLS data. System calls use the SWITCH instruction with the immediate 0x440001 to signal a system call. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Meta core internal interrupts (from HWSTATMETA and friends) are vectored onto the TR1 core trigger for the current thread. This is demultiplexed in irq-metag.c to individual Linux IRQs for each internal interrupt. External SoC interrupts (from HWSTATEXT and friends) are vectored onto the TR2 core trigger for the current thread. This is demultiplexed in irq-metag-ext.c to individual Linux IRQs for each external SoC interrupt. The external irqchip has devicetree bindings for configuring the number of irq banks and the type of masking available. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Rob Landley <rob@landley.net> Cc: Dom Cobley <popcornmix@gmail.com> Cc: Simon Arlott <simon@fire.lp0.eu> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: devicetree-discuss@lists.ozlabs.org Cc: linux-doc@vger.kernel.org
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James Hogan authored
Add core IRQ handling for metag. The code in irq.c exposes the TBX signal numbers as Linux IRQs. Signed-off-by: James Hogan <james.hogan@imgtec.com>
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James Hogan authored
Add trap code for metag. At the lowest level Meta traps (and return from interrupt instruction - RTI) simply swap the PC and PCX registers and optionally toggle the interrupt status bit (ISTAT). Low level TBX code in tbipcx.S handles the core context save, determine the TBX signal number based on the core trigger that fired (using the TXSTATI status register), and call TBX signal handlers (mostly in traps.c) via a vector table. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Al Viro <viro@zeniv.linux.org.uk>
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James Hogan authored
Add time keeping code for metag. Meta hardware threads have 2 timers. The background timer (TXTIMER) is used as a free-running time base, and the interrupt timer (TXTIMERI) is used for the timer interrupt. Both counters traditionally count at approximately 1MHz. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: John Stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de>
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James Hogan authored
The ptrace interface for metag provides access to some core register sets using the PTRACE_GETREGSET and PTRACE_SETREGSET operations. The details of the internal context structures is abstracted into user API structures to both ease use and allow flexibility to change the internal context layouts. Copyin and copyout functions for these register sets are exposed to allow signal handling code to use them to copy to and from the signal context. struct user_gp_regs (NT_PRSTATUS) provides access to the core general purpose register context. struct user_cb_regs (NT_METAG_CBUF) provides access to the TXCATCH* registers which contains information abuot a memory fault, unaligned access error or watchpoint. This can be modified to alter the way the fault is replayed on resume ("catch replay"), or to prevent the replay taking place. struct user_rp_state (NT_METAG_RPIPE) provides access to the state of the Meta read pipeline which can be used to hide memory latencies in hand optimised data loops. Extended DSP register state, DSP RAM, and hardware breakpoint registers aren't yet exposed through ptrace. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Denys Vlasenko <vda.linux@googlemail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Tony Lindgren <tony@atomide.com> Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
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James Hogan authored
Add device tree files to arch/metag. Signed-off-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Vineet Gupta <vgupta@synopsys.com>
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