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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2009-10-26 00:31:50 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2009-10-26 00:34:57 +0100 |
| commit | 1f9a3b0584987f05b7e8560ff6ed59a3d78113e0 (patch) | |
| tree | a3f4343d3f1fffd1e2e722335672b8a693758691 | |
| parent | 54efb9945a023fd164fadbf87eedb9cc8234f4cd (diff) | |
Make tuning VM_MAX_ADDRESS trivial
* i386/i386/vm_param.h (LINEAR_MIN_KERNEL_ADDRESS): Set to
VM_MAX_ADDRESS instead of hardcoding to 0xc0000000.
(VM_MAX_KERNEL_ADDRESS): Set to LINEAR_MAX_KERNEL_ADDRESS -
LINEAR_MIN_KERNEL_ADDRESS instead of hardcoding to 0x40000000.
* i386/include/mach/i386/vm_param.h: Document how it may be tuned.
| -rw-r--r-- | i386/i386/vm_param.h | 4 | ||||
| -rw-r--r-- | i386/include/mach/i386/vm_param.h | 9 |
2 files changed, 9 insertions, 4 deletions
diff --git a/i386/i386/vm_param.h b/i386/i386/vm_param.h index 96fc8bac..ba8e5846 100644 --- a/i386/i386/vm_param.h +++ b/i386/i386/vm_param.h @@ -28,12 +28,12 @@ /* The kernel address space is 1GB, starting at virtual address 0. */ #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0x00000000) -#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0x40000000) +#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) (LINEAR_MAX_KERNEL_ADDRESS - LINEAR_MIN_KERNEL_ADDRESS)) /* The kernel virtual address space is actually located at high linear addresses. This is the kernel address range in linear addresses. */ -#define LINEAR_MIN_KERNEL_ADDRESS ((vm_offset_t) 0xc0000000) +#define LINEAR_MIN_KERNEL_ADDRESS ((vm_offset_t) VM_MAX_ADDRESS) #define LINEAR_MAX_KERNEL_ADDRESS ((vm_offset_t) 0xffffffff) #define KERNEL_STACK_SIZE (1*I386_PGBYTES) diff --git a/i386/include/mach/i386/vm_param.h b/i386/include/mach/i386/vm_param.h index a6b1efd5..e3cb2e47 100644 --- a/i386/include/mach/i386/vm_param.h +++ b/i386/include/mach/i386/vm_param.h @@ -66,8 +66,13 @@ #define i386_trunc_page(x) (((unsigned)(x)) & ~(I386_PGBYTES-1)) /* User address spaces are 3GB each, - starting at virtual and linear address 0. */ + starting at virtual and linear address 0. + + VM_MAX_ADDRESS can be reduced to leave more space for the kernel, but must + not be increased to more than 3GB as glibc and hurd servers would not cope + with that. + */ #define VM_MIN_ADDRESS ((vm_offset_t) 0) -#define VM_MAX_ADDRESS ((vm_offset_t) 0xc0000000) +#define VM_MAX_ADDRESS ((vm_offset_t) 0x80000000) #endif /* _MACH_I386_VM_PARAM_H_ */ |