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* MIPS: Preliminary VDSODavid Daney2010-04-121-2/+9
| | | | | | | | | | | | | | | | This is a preliminary patch to add a vdso to all user processes. Still missing are ELF headers and .eh_frame information. But it is enough to allow us to move signal trampolines off of the stack. Note that emulation of branch delay slots in the FPU emulator still requires the stack. We allocate a single page (the vdso) and write all possible signal trampolines into it. The stack is moved down by one page and the vdso is mapped into this space. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/975/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Avoid clobbering struct pt_regs in kthreadsDavid Daney2009-08-031-2/+3
| | | | | | | | | | | | | | | | | | | The resume() implementation octeon_switch.S examines the saved cp0_status register. We were clobbering the entire pt_regs structure in kernel threads leading to random crashes. When switching away from a kernel thread, the saved cp0_status is examined and if bit 30 is set it is cleared and the CP2 state saved into the pt_regs structure. Since the kernel thread stack overlaid the pt_regs structure this resulted in a corrupt stack. When the kthread with the corrupt stack was resumed, it could crash if it used any of the data in the stack that was clobbered. We fix it by moving the kernel thread stack down so it doesn't overlay pt_regs. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Add Cavium OCTEON cop2/cvmseg state entries to processor.h.David Daney2009-01-111-0/+69
| | | | | | | | | Add in the cop2 and cvmseg state info to the known proc reg data for Cavium so that it can be tracked, saved, restored. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* MIPS: Add HARDWARE_WATCHPOINTS definitions and support code.David Daney2008-10-111-0/+20
| | | | | | | | | | | This is the main support code for the patch. Here we just add the code, the following patches hook it up. Signed-off-by: David Daney <ddaney@avtrex.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> create mode 100644 arch/mips/include/asm/watch.h create mode 100644 arch/mips/kernel/watch.c
* MIPS: Move headfiles to new location below arch/mips/includeRalf Baechle2008-10-111-0/+263
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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