Changeset 84060e2 in mainline for kernel/arch/sparc64/src/cpu/cpu.c

Timestamp:

2006-10-09T19:29:42Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

8ce8499

Parents:

e4398200

Message:

sparc64 work:

• hw_map() can now support up to 8M requests
• CPU stacks are now locked in DTLB of the respective processor
• kernel in the boot phase no longer relies on the stack provided by OpenFirmware
• instead of of doing FLUSHW during kernel startup, simply set the window state registers to the wanted state
• NWINDOW → NWINDOWS
• Add/fix some comments and copyrights.

File:

• kernel/arch/sparc64/src/cpu/cpu.c (modified) (3 diffs)

kernel/arch/sparc64/src/cpu/cpu.c

@@ -41 +41 @@
 #include <arch/types.h>
 #include <arch/drivers/tick.h>
+#include <arch/mm/page.h>
+#include <arch/mm/tlb.h>
+#include <macros.h>
 
 /** Perform sparc64 specific initialization of the processor structure for the current processor. */
@@ -53 +56 @@
         CPU->arch.mid = upa_config.mid;
         
+        /*
+         * Detect processor frequency.
+         */
         node = ofw_tree_find_child_by_device_type(ofw_tree_lookup("/"), "cpu");
         while (node) {
@@ -71 +77 @@
         CPU->arch.clock_frequency = clock_frequency;
         tick_init();
+        
+        /*
+         * Lock CPU stack in DTLB.
+         */
+        uintptr_t base = ALIGN_DOWN(config.base, 1<<KERNEL_PAGE_WIDTH);
+                 
+        if (!overlaps((uintptr_t) CPU->stack, PAGE_SIZE, base, (1<<KERNEL_PAGE_WIDTH))) {
+                /*
+                 * Kernel stack of this processor is not locked in DTLB.
+                 * First, demap any already existing mappings.
+                 * Second, create a locked mapping for it.
+                 */
+                dtlb_demap(TLB_DEMAP_PAGE, TLB_DEMAP_NUCLEUS, (uintptr_t) CPU->stack);
+                dtlb_insert_mapping((uintptr_t) CPU->stack, KA2PA(CPU->stack), PAGESIZE_8K, true, true);
+        }
+
 }