kernel.git/arch/powerpc/platforms/cell, branch linux-2.6.19.y

[POWERPC] Fix cell "new style" mapping and add debug

2006-11-10T10:35:36Z

This fixes a typo in the "new style" code for mapping SPE resources, which causes it to try to map the same resource 4 times. It also adds some pr_debug's that are useful to track down issues with the firmware when bringinh up new machines. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras

[POWERPC] spufs: fix another off-by-one bug in spufs_mbox_read

2006-10-25T02:10:41Z

Currently, spufs_mbox_read transfers more bytes than requested on a read. If you ask for four bytes, you get eight. This fixes it to transfer the largest multiple of four bytes that is less than or equal to the number you asked for. Note: one nasty property of this file in spufs is that you can only read multiples of four bytes in the first place, since there is no way to atomically put back a few bytes into the hardware register. Thus, reading less than four bytes returns -EINVAL. Asking for more than four returns the largest possible multiple of four. Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras

[POWERPC] spufs: fix signal2 file to report signal2

2006-10-25T02:10:41Z

This fixes the /signal2 file to actually give signal2 data. Signed-off-by: Dwayne Grant Mcconnell Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras

[POWERPC] spufs: fix support for read/write on cntl

2006-10-16T05:52:14Z

This fixes a memory leak introduced by "spufs: add support for read/write oncntl", which was missing a call to simple_attr_close. Signed-off-by: Masato Noguchi Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras

[POWERPC] Don't crash on cell with 2 BEs when !CONFIG_NUMA

2006-10-16T05:52:14Z

The SPU code will crash if CONFIG_NUMA is not set and SPUs are found on a non-0 node. This workaround will ignore those SPEs and just print an message in the kernel log. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras

[POWERPC] SPU fixup after irq changes

2006-10-07T12:11:17Z

Remove struct pt_regs * from remaining spu irq functions. Signed-off-by: Olaf Hering Signed-off-by: Paul Mackerras

[POWERPC] Fix up after irq changes

2006-10-07T12:08:26Z

Remove struct pt_regs * from all handlers. Also remove the regs argument from get_irq() functions. Compile tested with arch/powerpc/config/* and arch/ppc/configs/prep_defconfig Signed-off-by: Olaf Hering Signed-off-by: Paul Mackerras

[PATCH] powerpc: irq change build breaks

2006-10-06T01:39:04Z

Fix up some of the buildbreaks from the irq handler changes. Signed-off-by: Olof Johansson Signed-off-by: Linus Torvalds

IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

2006-10-05T14:10:12Z

Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

[POWERPC] cell: fix bugs found by sparse

2006-10-04T23:21:02Z

- Some long constants should be marked 'ul'. - When using desc->handler_data to pass an __iomem register area, we need to add casts to and from __iomem. Signed-off-by: Arnd Bergmann Signed-off-by: Paul Mackerras