Hello. On 09-04-2012 20:04, Steven J. Hill wrote:
From: "Steven J. Hill"<sjhill@xxxxxxxx>
Signed-off-by: Leonid Yegoshin<yegoshin@xxxxxxxx> Signed-off-by: Steven J. Hill<sjhill@xxxxxxxx> --- arch/mips/Kconfig | 29 +++++++++++++++++++++++------ arch/mips/include/asm/cpu.h | 2 +- arch/mips/kernel/cpu-probe.c | 4 ++++ arch/mips/kernel/traps.c | 1 + 4 files changed, 29 insertions(+), 7 deletions(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 991de91..fae33f3 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -282,6 +282,7 @@ config MIPS_MALTA select SYS_HAS_CPU_MIPS32_R1 select SYS_HAS_CPU_MIPS32_R2 select SYS_HAS_CPU_MIPS64_R1 + select SYS_HAS_CPU_MIPS64_R2 select SYS_HAS_CPU_NEVADA select SYS_HAS_CPU_RM7000 select SYS_HAS_EARLY_PRINTK @@ -1761,6 +1762,22 @@ config 64BIT endchoice +config 64BIT_PHYS_ADDR + bool "Kernel supports 64 bit physical addresses" if EXPERIMENTAL + depends on 64BIT
This option is selected on 32-bit CPUs like Alchemy, which has 36-bit physical address. It will cause a warning about unmet direct dependencies then.
+ help + Defines 64 bit physical addresses in kernel. + Increases page table sizes. + + It is an alternative for HIGHMEM usage of huge physical memory. + Requires 64bit capable CPU and 64 bit kernel code model.
No, it really doesn't.
+ Note: without this option kernel can support up to 4GB physical + memory for 4KB pages and up to 64GB for 64KB pages. + +config ARCH_PHYS_ADDR_T_64BIT + def_bool 64BIT_PHYS_ADDR + choice prompt "Kernel page size" default PAGE_SIZE_4KB
WBR, Sergei
