- 04 Jan, 2005 40 commits
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David Howells authored
The attached patch does two things: (1) Implements the ext2/ext3 bitops in terms of the main bitops functions. (2) Changes the Minix bitops to use the ext2 bitops (LE) rather than the main bitops (BE). Signed-Off-By:David Howells <dhowells@redhat.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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David Howells authored
The attached patch fixes three debugging problems in the frv arch: (1) Single-stepping in userspace steps through into the kernel-mode interrupt handler when a hardware interrupt happens, and sometimes it gets past where the debug-mode handler would normally catch it. This patch extends the range of detected PC values. (2) When setting up the kernel-mode exception frame from the debug-mode handler for a userspace debugging event, we weren't setting the LR register to generate a return to the exception handler epilogue. (3) sys_ptrace() now needs to "put" the inferior task_struct not "free" it as was done in 2.4. Signed-Off-By: -
David Howells authored
The attached patch makes more syscalls available for the FR-V arch. Signed-Off-By:
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David Howells authored
The attached patch changes the nommu bits of the FRV arch to incorporate the name changes made to the nommu core stuff. Signed-Off-By:
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David Howells authored
The attached patch changes the nommu procfs routines to match the nommu changes in patch 1/1. This is an exercise in structure renaming and handling the fact that the list of VMAs in the system is now held together by vma->vm_rb. Signed-Off-By:
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David Howells authored
The attached patch further changes the nommu stuff previously changed. These new changes do the following: (0) Some additional variables have been defined to make nommu even compile. (1) Get rid of the alternate vm_area_struct. The nommu mmap now uses the normal one. There's a refcount field added to the normal one, contingent on !CONFIG_MMU. (2) vm_rb is now used to keep track of the VMAs in an rbtree rather than adding a separate list. (3) mm_tblock_struct is now vm_list_struct. (4) put_vma() now calls vma->vm_ops->close() if available on nommu. (5) A dummy generic_file_vm_ops has been provided. It does nothing, but permits tiny-shmem to compile. tiny-shmem and ramfs still need attention, such that files contained therein can be mmapped shared-writably to some extent on nommu. Signed-Off-By: -
David Howells authored
The attached patch fixes the following problems in the ELF-FDPIC binfmt driver: (1) elf_fdpic_map_file() should be passed an mm_struct pointer, not NULL. (2) do_mmap() should be called with the mmap_sem held. (3) mm_struct::end_brk doesn't exist in 2.6 (debugging only). (4) Avoid debugging warnings by casting certain values to unsigned long before printing them. Signed-Off-By: -
David Howells authored
The attached patch adds a new binary format driver that allows a special variety of ELF to be used that permits the dynamic sections that comprise an executable, its dynamic loader and its shared libaries and its stack and data to be located anywhere within the address space. This is used to provide shared libraries and shared executables (at least, as far as the read-only dynamic sections go) on uClinux. Not only that, but the same binaries can be run on MMU linux without a problem. This is achieved by: (1) Passing loadmaps to the dynamic loader (or to a statically linked executable) to indicate the whereabouts of the various dynamic sections. (2) Using a GOT inside the program. (3) Passing setup_arg_pages() the stack pointer to be. (4) Allowing the arch greated control over how an executable is laid out in memory in MMU Linux. (5) Rewriting mm/nommu.c to support MAP_PRIVATE on files, thus allowing _mmap_ to handle sharing of private-readonly mappings. Signed-Off-By: -
David Howells authored
The attached patch fixes the usage of setup_arg_pages() in the IA64, MIPS, S390 and Sparc64 arches. This function now takes an extra parameter: the initial top of stack. This is useful in uClinux when there's no fixed location to which the stack pointer can be initialised. Signed-Off-By:
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David Howells authored
The attached patch changes setup_arg_pages() to take the proposed initial stack top for the new executable image. This makes it easier for the binfmt to place the stack at a non-fixed location, such as happens in !MMU configurations. Signed-Off-By:
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David Howells authored
The attached patch splits some memory-related procfs files into MMU and !MMU versions and places them in separate conditionally-compiled files. A header file local to the fs/proc/ directory is used to declare functions and the like. Additionally, a !MMU-only proc file (/proc/maps) is provided so that master VMA list in a uClinux kernel is viewable. Signed-Off-By:
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David Howells authored
The attached patch changes mm/nommu.c to better support mmap() when MMU support is disabled (as it is in uClinux). This was discussed on the uclibc mailing list in a thread revolving around the following message: Date: Thu, 1 Apr 2004 12:05:50 +1000 From: David McCullough <davidm@snapgear.com> To: David Howells <dhowells@redhat.com> Cc: Alexandre Oliva <aoliva@redhat.com>, uclibc@uclibc.org Subject: Re: [uClibc] mmaps for malloc should be private Message-ID: <20040401020550.GG3150@beast> The revised rules are: (1) Anonymous mappings can be shared or private, read or write. (2) Chardevs can be mapped shared, provided they supply a get_unmapped_area() file operation and use that to set the address of the mapping (as a frame buffer driver might do, for instance). (3) Files (and blockdevs) cannot be mapped shared since it is not really possible to honour this by writing any changes back to the backing device. (4) Files (or sections thereof) can be mapped read-only private, in which case the mapped bit will be read into memory and shared, and its address will be returned. Any excess beyond EOF will be cleared. (5) Files (or sections thereof) can be mapped writable private, in which case a private copy of the mapped bit will be read into a new bit memory, and its address will be returned. Any excess beyond EOF will be cleared. Mappings are per MM structure still. You can only unmap what you've mapped. Fork semantics are irrelevant, since there's no fork. A global list of VMA's is maintained to keep track of the bits of memory currently mapped on the system. The new binfmt makes use of (4) to implement shared libraries. Signed-Off-By: -
David Howells authored
The attached patch makes calibrate_delay() optional. In this architecture, it's a waste of time since we can predict exactly what it's going to come up with just by looking at the CPU's hardware clock registers. Thus far, we haven't seen a board with any clock not dependent on the CPU's clock. Signed-Off-By:
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David Howells authored
The attached patch provides the remaining arch-specific include files for the Fujitsu FR-V CPU arch. Signed-Off-By:
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David Howells authored
The attached patch provides the third 100KB or so of the arch-specific include files for the Fujitsu FR-V CPU arch. Signed-Off-By:
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William Lee Irwin III authored
This patch converts FRV to use remap_pfn_range() in its io_remap_page_range() function. Signed-off-by:
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David Howells authored
The attached patch provides the second 100KB or so of the arch-specific include files for the Fujitsu FR-V CPU arch. Signed-Off-By:
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David Howells authored
The attached patch makes byte and word writes to PCI config space work. The problem was that the pointer to the appropriate chunk of the config port needs to be juggled to allow for the fact that FRV is big endian in this case. Signed-Off-By:
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David Howells authored
The attached patch makes cache flushing work correctly on DMA consistent memory for the frv arch. On the FRV unmapped memory can't be flushed directly, but has to be kmapped first since the flush instructions take virtual pointers not physical ones. It also splits the MMU and !MMU versions into separate files. Signed-Off-By:
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David Howells authored
The attached patch removes irq_enter() and friends from asm-frv/hardirq.h as they are now mandatorily defined in linux/hardirq.h. Signed-Off-By:
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David Howells authored
The attached patch provides the first 100KB or so of the arch-specific include files for the Fujitsu FR-V CPU arch. Signed-Off-By:
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Dave Hansen authored
People love to do comparisons with highmem_start_page. However, where CONFIG_HIGHMEM=y and there is no actual highmem, there's no real page at *highmem_start_page. That's usually not a problem, but CONFIG_NONLINEAR is a bit more strict and catches the bogus address tranlations. There are about a gillion different ways to find out of a 'struct page' is highmem or not. Why not just check page_flags? Just use PageHighMem() wherever there used to be a highmem_start_page comparison. Then, kill off highmem_start_page. This removes more code than it adds, and gets rid of some nasty #ifdefs in .c files. Signed-off-by:
Dave Hansen <haveblue@us.ibm.com> Signed-off-by:
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David Howells authored
The attached patch makes the FR-V arch put all its memory in the DMA zone rather than the Normal zone since all the memory is available as a DMA target. Signed-Off-By:
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David Howells authored
The attached patches provides part 9 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 8 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 7 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 6 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 5 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 4 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 3 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 2 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patches provides part 1 of an architecture implementation for the Fujitsu FR-V CPU series, configurably as Linux or uClinux. Signed-Off-By:
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David Howells authored
The attached patch provides the arch-specific documentation for the Fujitsu FR-V CPU arch. Signed-Off-By:
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David Howells authored
The attached patch supplies the maintainer record for an architecture implementation for the Fujistu FR-V CPU series. Signed-Off-By:
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David Howells authored
The attached patch fixes a number of problems in the VM routines: (1) Some inline funcs don't compile if CONFIG_MMU is not set. (2) swapper_pml4 needn't exist if CONFIG_MMU is not set. (3) __free_pages_ok() doesn't counter set_page_refs() different behaviour if CONFIG_MMU is not set. (4) swsusp.c invokes TLB flushing functions without including the header file that declares them. CONFIG_SHMEM semantics: - If MMU: Always enabled if !EMBEDDED - If MMU && EMBEDDED: configurable - If !MMU: disabled Signed-Off-By: -
David Howells authored
The attached patch marks a variable as __initdata in a header file so that the FRV gcc generates the correct access method as initdata variables are too far from the GPREL pointer to access directly. Signed-Off-By:
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David Howells authored
The attached patch makes it possible to support gp-rel addressing for small variables. Since the FR-V cpu's have fixed-length instructions and plenty of general-purpose registers, one register is nominated as a base for the small data area. This makes it possible to use single-insn accesses to access global and static variables instead of having to use multiple instructions. This, however, causes problems with small variables used to pinpoint the beginning and end of sections. The compiler assumes it can use gp-rel addressing for these, but the linker then complains because the displacement is out of range. By declaring certain variables as arrays or by forcing them into named sections, the compiler is persuaded to access them as if they can be outside the displacement range. Declaring the variables as "const void" type also works. Signed-Off-By:
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David Howells authored
The attached patch provides an out-of-line implementation of find_next_bit() and rearranges linux/bitops.h to avoid a dependency loop between inline functions in there and in asm/bitops.h trying to include one another. Signed-Off-By:
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Stephen Rothwell authored
More tidying up. The htab_data structure contained 5 fields or which two were completely unused and one other was just kept for printing at boot time. I have mode the remaining two into global variables. Built and booted on iSeries (which is always lpar) and on pSeries without partitioning. Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Stephen Rothwell authored
This patch is just more clean up in the ppc64 arch. It uses c99 initializers for various iSeries structures that are used to pass information to the hypervisor. Also itLpNaca is not used by any code that could be in a module, so don't export it. Built and booted. Signed-off-by:
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