Changeset f8ddd17 in mainline for kernel/generic/src/lib/rd.c

Timestamp:

2006-12-09T20:20:50Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

b82a13c

Parents:

9ab9c2ec

Message:

Rework support for virtually indexed cache.
Instead of repeatedly flushing the data cache, which was a huge overkill, refuse to create an illegal address alias
in the kernel (again) and allocate appropriate page color in userspace instead. Extend the detection also to
SYS_PHYSMEM_MAP syscall.

Add support for tracking physical memory areas mappable by SYS_PHYSMEM_MAP.

Lots of coding style changes.

File:

• kernel/generic/src/lib/rd.c (modified) (2 diffs)

kernel/generic/src/lib/rd.c

@@ -42 +42 @@
 #include <mm/frame.h>
 #include <sysinfo/sysinfo.h>
+#include <ddi/ddi.h>
+
+static parea_t rd_parea;                /**< Physical memory area for rd. */
 
 int init_rd(rd_header * header, size_t size)
 {
         /* Identify RAM disk */
-        if ((header->magic[0] != RD_MAG0) || (header->magic[1] != RD_MAG1) || (header->magic[2] != RD_MAG2) || (header->magic[3] != RD_MAG3))
+        if ((header->magic[0] != RD_MAG0) || (header->magic[1] != RD_MAG1) ||
+                (header->magic[2] != RD_MAG2) || (header->magic[3] != RD_MAG3))
                 return RE_INVALID;
         
@@ -77 +81 @@
                 dsize = size - hsize;
         
+        rd_parea.pbase = KA2PA((void *) header + hsize);
+        rd_parea.vbase = (uintptr_t) ((void *) header + hsize);
+        rd_parea.frames = SIZE2FRAMES(dsize);
+        rd_parea.cacheable = true;
+        ddi_parea_register(&rd_parea);
+
         sysinfo_set_item_val("rd", NULL, true);
         sysinfo_set_item_val("rd.size", NULL, dsize);
-        sysinfo_set_item_val("rd.address.physical", NULL, (unative_t) KA2PA((void *) header + hsize));
+        sysinfo_set_item_val("rd.address.physical", NULL, (unative_t)
+                KA2PA((void *) header + hsize));
+        sysinfo_set_item_val("rd.address.color", NULL, (unative_t)
+                PAGE_COLOR((uintptr_t) header + hsize));
 
         return RE_OK;