diff options
Diffstat (limited to 'arch/m68k/Kconfig.cpu')
| -rw-r--r-- | arch/m68k/Kconfig.cpu | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu index 694c4fca9f5d..3e70fb7a8d83 100644 --- a/arch/m68k/Kconfig.cpu +++ b/arch/m68k/Kconfig.cpu @@ -20,6 +20,7 @@ choice config M68KCLASSIC bool "Classic M68K CPU family support" + select HAVE_ARCH_PFN_VALID config COLDFIRE bool "Coldfire CPU family support" @@ -373,16 +374,38 @@ config RMW_INSNS config SINGLE_MEMORY_CHUNK bool "Use one physical chunk of memory only" if ADVANCED && !SUN3 depends on MMU - default y if SUN3 - select NEED_MULTIPLE_NODES + default y if SUN3 || MMU_COLDFIRE help Ignore all but the first contiguous chunk of physical memory for VM purposes. This will save a few bytes kernel size and may speed up - some operations. Say N if not sure. + some operations. + When this option os set to N, you may want to lower "Maximum zone + order" to save memory that could be wasted for unused memory map. + Say N if not sure. config ARCH_DISCONTIGMEM_ENABLE + depends on BROKEN def_bool MMU && !SINGLE_MEMORY_CHUNK +config FORCE_MAX_ZONEORDER + int "Maximum zone order" if ADVANCED + depends on !SINGLE_MEMORY_CHUNK + default "11" + help + The kernel memory allocator divides physically contiguous memory + blocks into "zones", where each zone is a power of two number of + pages. This option selects the largest power of two that the kernel + keeps in the memory allocator. If you need to allocate very large + blocks of physically contiguous memory, then you may need to + increase this value. + + For systems that have holes in their physical address space this + value also defines the minimal size of the hole that allows + freeing unused memory map. + + This config option is actually maximum order plus one. For example, + a value of 11 means that the largest free memory block is 2^10 pages. + config 060_WRITETHROUGH bool "Use write-through caching for 68060 supervisor accesses" depends on ADVANCED && M68060 @@ -406,7 +429,7 @@ config M68K_L2_CACHE config NODES_SHIFT int default "3" - depends on !SINGLE_MEMORY_CHUNK + depends on DISCONTIGMEM config CPU_HAS_NO_BITFIELDS bool |