- 04 Jan, 2005 40 commits
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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 <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 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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Stephen Rothwell authored
This patch just renames all the fields (and the structure name) of the lppaca structure to rid us of some more StudyCaps. Signed-off-by:
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Stephen Rothwell authored
This patch just renames asm/iSeries/ItLpPaca.h to asm/lppaca.h as the lppaca structure is no longer just legacy iSeries specific. Signed-off-by:
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Stephen Rothwell authored
This fixes an aweful piece of code that could have just referenced xPMCRegsInUse in the lppaca structure. Signed-off-by:
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Stephen Rothwell authored
This patch finally removes the naca from all architectures except legacy iSeries and in the process makes it a structure instead of a pointer. Signed-off-by:
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Stephen Rothwell authored
The patch moves the debug_switch from the naca to a global variable. Also, a couple of trivial naming tidy ups. Signed-off-by:
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Stephen Rothwell authored
The serialPortAddr field of the naca was only being used locally, remove it. Signed-off-by:
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Stephen Rothwell authored
The only place that was using the paca pointer that was in the naca was some assembler that used it to find a parameter to pass to some C code. That C code did not even declare that parameter! Remove the paca pointer. Signed-off-by:
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Stephen Rothwell authored
This patch removes the (unused) /proc entries for the naca and the (per cpu) pacas. Also it removes a lot of no longer necessary includes of <asm/naca.h>. Signed-off-by:
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Stephen Rothwell authored
This patch just moves the interrupt_controller field of the naca into a global variable. Signed-off-by:
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Stephen Rothwell authored
This patch just removes the page table size field from the naca (and makes it ppc64_pft_size instead). Signed-off-by:
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Stephen Rothwell authored
This patch consolidates the variables that define the PPC64 cache sizes into a single structure (the were in the naca and the systemcfg structures). Those that were in the systemcfg structure are left there just because they are exported to user mode through /proc. Signed-off-by:
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