Changeset c520034 in mainline for kernel/generic/src/main/main.c

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/src/main/main.c (modified) (4 diffs)

kernel/generic/src/main/main.c

@@ -68 +68 @@
 #include <mm/page.h>
 #include <genarch/mm/page_pt.h>
+#include <mm/km.h>
 #include <mm/tlb.h>
 #include <mm/as.h>
@@ -86 +87 @@
 #include <sysinfo/sysinfo.h>
 #include <sysinfo/stats.h>
+#include <lib/ra.h>
 
 /** Global configuration structure. */
-config_t config;
+config_t config = {
+        .identity_configured = false,
+        .non_identity_configured = false,
+        .physmem_end = 0
+};
 
 /** Initial user-space tasks */
@@ -205 +211 @@
          */
         arch_pre_mm_init();
+        km_identity_init();
         frame_init();
-        
-        /* Initialize at least 1 memory segment big enough for slab to work. */
         slab_cache_init();
+        ra_init();      
         sysinfo_init();
         btree_init();
@@ -214 +220 @@
         page_init();
         tlb_init();
+        km_non_identity_init();
         ddi_init();
         arch_post_mm_init();