Changeset c520034 in mainline for kernel/generic/include/config.h

Timestamp:

2011-12-31T18:19:35Z (12 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

295f658, 77c2b02, 96cd5b4

Parents:

852052d (diff), 22f0561 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Support for kernel non-identity mappings, phase I.

• identity/non-identity kernel memory split on all architectures
• low/high physical memory split on all architectures
• frame allocator understands low/high memory
• high physical memory currently unused (Phase II)
• more compact frame_t
• zone conf frames, pte_t, kernel stacks allocated from low memory
• lockless TLB-miss handlers everywhere (newly sparc64, ia64)
• preallocate PTL1 page tables for non-identity and prevent their deallocation
• hw_map() unification
• new resource allocator used for allocating kernel virtual addresses

Breakage:

• sparc64/sun4v creates too large kernel identity; not fixed because of lack of testing hw
• ppc32's tlb_refill() seems wrong as it creates too large kernel identity, but appears unused and the architecture works normally

Not implemented yet (phase II):

• allow high memory to be used for common kernel allocations

File:

• kernel/generic/include/config.h (modified) (1 diff)

kernel/generic/include/config.h

@@ -74 +74 @@
 
 typedef struct {
-        unsigned int cpu_count;      /**< Number of processors detected. */
-        volatile size_t cpu_active;  /**< Number of processors that are up and running. */
+        /** Number of processors detected. */
+        unsigned int cpu_count;
+        /** Number of processors that are up and running. */
+        volatile size_t cpu_active;
         
         uintptr_t base;
-        size_t kernel_size;          /**< Size of memory in bytes taken by kernel and stack */
+        /** Size of memory in bytes taken by kernel and stack. */
+        size_t kernel_size;
         
-        uintptr_t stack_base;        /**< Base adddress of initial stack */
-        size_t stack_size;           /**< Size of initial stack */
+        /** Base adddress of initial stack. */
+        uintptr_t stack_base;
+        /** Size of initial stack. */
+        size_t stack_size;
+
+        bool identity_configured;
+        /** Base address of the kernel identity mapped memory. */
+        uintptr_t identity_base;
+        /** Size of the kernel identity mapped memory. */
+        size_t identity_size;
+
+        bool non_identity_configured;   
+
+        /** End of physical memory. */
+        uint64_t physmem_end;
 } config_t;