BMC/Intel-BMC/linux.git/arch/xtensa/mm/init.c, branch dev

xtensa: nommu: clean up memory map dump

2014-10-21T09:28:58+00:00

noMMU configuration doesn't use special area for vmalloc allocations, don't print it in the memory map. PAGE_OFFSET is fixed to 0 in noMMU, use min_low_pfn and max_low_pfn for lowmem range display. Make all XCHAL_KSEG_* constants unsigned long for consistency with other addresses. Signed-off-by: Max Filippov

xtensa: nommu: reserve memory below PLATFORM_DEFAULT_MEM_START

2014-10-21T09:28:57+00:00

Memory accounting code can't handle pages below PLATFORM_DEFAULT_MEM_START. Reserve those pages if they exist. When PLATFORM_DEFAULT_MEM_START is zero reserve one page at address 0 to make sure that successfull memory allocations don't return NULL. Signed-off-by: Max Filippov

xtensa: fix sysmem reservation at the end of existing block

2014-06-09T18:29:12+00:00

When sysmem reservation occurs exactly at the end of an existing block that block is deleted, because it is incorrectly included in the range of memblocks to remove. Fix that by skipping such block. Cc: stable@vger.kernel.org Signed-off-by: Max Filippov

xtensa: add HIGHMEM support

2014-04-06T17:29:21+00:00

Introduce fixmap area just below the vmalloc region. Use it for atomic mapping of high memory pages. High memory on cores with cache aliasing is not supported and is still to be implemented. Fail build for such configurations for now. Signed-off-by: Max Filippov

xtensa: dump sysmem from the bootmem_init

2014-04-01T21:35:55+00:00

Debug dump of physical memory configuration. Useful for inspection of resulting memory map, esp. in the presence of memmap= kernel option. Signed-off-by: Max Filippov

xtensa: handle memmap kernel option

2014-04-01T21:35:54+00:00

This option is useful for reserving memory regions for secondary cores in AMP configurations. Implement the following memmap variants: - memmap=nn[KMG]@ss[KMG]: force usage of a specific region of memory; - memmap=nn[KMG]$ss[KMG]: mark specified memory as reserved; - memmap=nn[KMG]: set end of memory. Signed-off-by: Max Filippov

xtensa: keep sysmem banks ordered in mem_reserve

2014-04-01T21:35:53+00:00

Rewrite mem_reserve so that it keeps bank order. Also make its return code more traditional. Signed-off-by: Max Filippov

xtensa: keep sysmem banks ordered in add_sysmem_bank

2014-04-01T21:35:52+00:00

Rewrite add_sysmem_bank so that it keeps bank order and merges adjacent/overlapping banks. Signed-off-by: Max Filippov

xtensa: split bootparam and kernel meminfo

2014-04-01T21:35:51+00:00

Bootparam meminfo is a bootloader ABI, kernel meminfo is for the kernel bookkeeping, keep them separate. Kernel doesn't care of memory region types, so drop the type field and don't pass it to add_sysmem_bank. Move kernel sysmem structures and prototypes to asm/sysmem.h and sysmem variable and add_sysmem_bank to mm/init.c Signed-off-by: Max Filippov

xtensa: don't pass high memory to bootmem allocator

2014-02-21T17:33:39+00:00

This fixes panic when booting on machine with more than 128M memory passed from the bootloader. Signed-off-by: Max Filippov