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* xtensa: add static function tracer supportMax Filippov2013-07-081-0/+1
| | | | | Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: add stacktrace supportMax Filippov2013-05-091-3/+3
| | | | | Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: add MMU v3 supportMax Filippov2013-05-091-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | MMUv3 comes out of reset with identity vaddr -> paddr mapping in the TLB way 6: Way 6 (512 MB) Vaddr Paddr ASID Attr RWX Cache ---------- ---------- ---- ---- --- ------- 0x00000000 0x00000000 0x01 0x03 RWX Bypass 0x20000000 0x20000000 0x01 0x03 RWX Bypass 0x40000000 0x40000000 0x01 0x03 RWX Bypass 0x60000000 0x60000000 0x01 0x03 RWX Bypass 0x80000000 0x80000000 0x01 0x03 RWX Bypass 0xa0000000 0xa0000000 0x01 0x03 RWX Bypass 0xc0000000 0xc0000000 0x01 0x03 RWX Bypass 0xe0000000 0xe0000000 0x01 0x03 RWX Bypass This patch adds remapping code at the reset vector or at the kernel _start (depending on CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) that reconfigures MMUv3 as MMUv2: Way 5 (128 MB) Vaddr Paddr ASID Attr RWX Cache ---------- ---------- ---- ---- --- ------- 0xd0000000 0x00000000 0x01 0x07 RWX WB 0xd8000000 0x00000000 0x01 0x03 RWX Bypass Way 6 (256 MB) Vaddr Paddr ASID Attr RWX Cache ---------- ---------- ---- ---- --- ------- 0xe0000000 0xf0000000 0x01 0x07 RWX WB 0xf0000000 0xf0000000 0x01 0x03 RWX Bypass Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: clean up files to make them code-style compliantChris Zankel2012-12-181-4/+4
| | | | | | | Remove heading and trailing spaces, trim trailing lines, and wrap lines that are longer than 80 characters. Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: adopt generic io routinesMax Filippov2012-10-031-1/+1
| | | | | Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: fix linker script transformation for .text.unlikelyMax Filippov2012-10-031-0/+1
| | | | | | | | | | | | | | | | Now that binutils generate *.unlikely sections which don't follow documented (info as) literal section naming rules, section name transformation script doesn't work well resulting in the following errors at vmlinux link time: main.c:(.text.unlikely+0x3): dangerous relocation: l32r: literal placed after use: .literal.unlikely Fix section name transformation script by adding specific rule for .text.unlikely sections. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* xtensa: Use generic init_taskThomas Gleixner2012-05-051-1/+1
| | | | | | | | Same code. Use the generic version. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Zankel <chris@zankel.net> Link: http://lkml.kernel.org/r/20120503085035.804059531@linutronix.de
* xtensa: Fix linker script patch-upChris Zankel2010-05-011-2/+2
| | | | | | | | | The Xtensa architecture requires to patch the generated linker script to insert precede certain sections with a .literal section. Ammend the sed script to fix-up only sequences that start with a '*': '*(.init.text)' -> '*(.init.literal .init.text)' Signed-off-by: Chris Zankel <chris@zankel.net>
* arm, cris, mips, sparc, powerpc, um, xtensa: fix build with bash 4.0Sam Ravnborg2009-09-201-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Albin Tonnerre <albin.tonnerre@free-electrons.com> reported: Bash 4 filters out variables which contain a dot in them. This happends to be the case of CPPFLAGS_vmlinux.lds. This is rather unfortunate, as it now causes build failures when using SHELL=/bin/bash to compile, or when bash happens to be used by make (eg when it's /bin/sh) Remove the common definition of CPPFLAGS_vmlinux.lds by pushing relevant stuff to either Makefile.build or the arch specific kernel/Makefile where we build the linker script. This is also nice cleanup as we move the information out where it is used. Notes for the different architectures touched: arm - we use an already exported symbol cris - we use a config symbol aleady available [Not build tested] mips - the jiffies complexity has moved to vmlinux.lds.S where we need it. Added a few variables to CPPFLAGS - they are only used by the linker script. [Not build tested] powerpc - removed assignment that is not needed [not build tested] sparc - simplified it using $(BITS) um - introduced a few new exported variables to deal with this xtensa - added options to CPP invocation [not build tested] Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* xtensa: Fix linker script to include .literal sectionsChris Zankel2009-05-111-3/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix resembles implementation from Marc Gauthier and Piet Denaly: In the Xtensa architecture, assembly generates literals which must always precede the code (the L32R instruction that loads them only uses negative PC-relative offsets). For any *.text section, literals are placed in a corresponding *.literal section. The linker script (vmlinux.lds) must place these in the correct order. It must also combine them, when the *.text section can be larger than L32R's 256 kB range. For example, this doesn't work: *(.literal) *(.text) because L32R instructions at the end of .text can't reach the literals. The linker can solve this if they are combined in parentheses, like this: *(.literal .text) because it is now allowed mix literals in .text to bring them in range. None of this is done by standard vmlinux.lds.h macros such as TEXT_TEXT and INIT_TEXT. To avoid replicating the logic of that header file, we instead post-process the generated linker script to convert *(xxx.text) to *(xxx.literal xxx.text) for the following text sections: .text .ref.text .*init.text .*exit.text .text.* using a sed script. To do this we must override the default rule for vmlinux.lds (see scripts/Makefile.build and the top-level Makefile) to insert this extra step. Signed-off-by: Marc Gauthier <marc@tensilica.com> Signed-off-by: Pete Delaney <piet@tensilica.com> Signed-off-by: Chris Zankel <chris@zankel.net>
* Generic semaphore implementationMatthew Wilcox2008-04-171-1/+1
| | | | | | | | | | | Semaphores are no longer performance-critical, so a generic C implementation is better for maintainability, debuggability and extensibility. Thanks to Peter Zijlstra for fixing the lockdep warning. Thanks to Harvey Harrison for pointing out that the unlikely() was unnecessary. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Ingo Molnar <mingo@elte.hu>
* [XTENSA] Move string-io functions to io.c from pci.cChris Zankel2007-08-271-1/+1
| | | | | | | The string-io functions (outs{bwl}, ins{bwl}) are independent from the PCI option and should be in a separate file. Signed-off-by: Chris Zankel <chris@zankel.net>
* [XTENSA] Move pre-initialized structures to init_task.cChris Zankel2007-08-271-1/+1
| | | | | | Move all initialization structures for the initial task to it's own file. Signed-off-by: Chris Zankel <chris@zankel.net>
* [PATCH] Xtensa: Add ktermios and minor filename fixChris Zankel2006-12-131-1/+1
| | | | | | | | | | | The kernel termios (ktermios) changes were somehow missed for Xtensa. This patch adds the ktermios structure and also includes some minor file name fix that was missed in the syscall patch. Signed-off-by: Chris Zankel <chris@zankel.net> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3Chris Zankel2005-06-241-0/+18
The attached patches provides part 3 of an architecture implementation for the Tensilica Xtensa CPU series. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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