sparc64: Make PAGE_OFFSET variable.

2013-11-12T23:22:34+00:00

Choose PAGE_OFFSET dynamically based upon cpu type. Original UltraSPARC-I (spitfire) chips only supported a 44-bit virtual address space. Newer chips (T4 and later) support 52-bit virtual addresses and up to 47-bits of physical memory space. Therefore we have to adjust PAGE_SIZE dynamically based upon the capabilities of the chip. Note that this change alone does not allow us to support > 43-bit physical memory, to do that we need to re-arrange our page table support. The current encodings of the pmd_t and pgd_t pointers restricts us to "32 + 11" == 43 bits. This change can waste quite a bit of memory for the various tables. In particular, a future change should work to size and allocate kern_linear_bitmap[] and sparc64_valid_addr_bitmap[] dynamically. This isn't easy as we really cannot take a TLB miss when accessing kern_linear_bitmap[]. We'd have to lock it into the TLB or similar. Signed-off-by: David S. Miller Acked-by: Bob Picco

sparc64: Consistently use fsrc2 rather than fmovd in optimized asm.

2012-06-27T08:25:23+00:00

Because fsrc2, unlike fmovd, does not update the %fsr register. Signed-off-by: David S. Miller

sparc,sparc64: unify lib/

2008-12-04T17:17:19+00:00

o Renamed files in sparc64 to _64.S when identical to sparc32 files. o iomap.c were equal for sparc32 and sparc64 o adjusted sparc/Makefile now we have only one lib/ Signed-off-by: Sam Ravnborg Signed-off-by: David S. Miller

BMC/Intel-BMC/linux.git/arch/sparc/lib/copy_page.S, branch dev

sparc64: Make PAGE_OFFSET variable.

sparc64: Consistently use fsrc2 rather than fmovd in optimized asm.

sparc,sparc64: unify lib/