Hi, These pacthes replace DISCONTIGMEM with SPARSEMEM on m68k for systems with !SINGLE_MEMORY_CHUNK set. With SPARSEMEM there is a single node for the entire physical memory and to cope with holes in the physical address space it is divided to sections of up to 16M. Each section has it's own memory map which size depends on actual populated memory. The section size of 16M was chosen pretty much arbitrarily as I couldn't find specs for systems with e.g. Zorro memory extensions. For the systems with ST-RAM and FastRAM, the switch to SPARSEMEM does not change the limitation that if the kernel is loaded into the FastRam the ST-RAM remains unmapped. It only ensures that if the kernel is loaded in ST-RAM, the memory map is allocated from high physical addresses and then atari/stram.c is able to reserve the frame buffer memory. If the kernel is loaded to FastRAM, the ST-RAM remains unmapped as with DISCONTIGMEM and the atari/stram.c maps it as IOMEM. v2 changes: * rebase on the current upstream * make ColdFire MMU select SINGLE_MEMORY_CHUNK in Kconfig.cpu Mike Rapoport (3): m68k/mm: make node data and node setup depend on CONFIG_DISCONTIGMEM m68k/mm: enable use of generic memory_model.h for !DISCONTIGMEM m68k/mm: switch from DISCONTIGMEM to SPARSEMEM arch/m68k/Kconfig.cpu | 14 ++++++-- arch/m68k/include/asm/page.h | 2 ++ arch/m68k/include/asm/page_mm.h | 6 +++- arch/m68k/include/asm/sparsemem.h | 8 +++++ arch/m68k/include/asm/virtconvert.h | 2 +- arch/m68k/mm/init.c | 8 ++--- arch/m68k/mm/motorola.c | 64 ++++++++++++++++++++++++++++++------- 7 files changed, 84 insertions(+), 20 deletions(-) create mode 100644 arch/m68k/include/asm/sparsemem.h -- 2.7.4
