Changeset 74df77d in mainline for arch/ia32/src/acpi/acpi.c

Timestamp:

2005-06-10T16:18:43Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

87cd61f

Parents:

18e0a6c

Message:

Add map_structure() to automate mapping of memory structures that can span multiple pages and/or cross page boundaries.
Change ACPI map_sdt() to use map_structure().

Small changes in MPS code.
The extra frame allocation for accessing frame 0 is unnecessary as it is possible to access frame 0 from kernel address space.
Zero TSS descriptor in the newly prepared GDT.

File:

• arch/ia32/src/acpi/acpi.c (modified) (1 diff)

arch/ia32/src/acpi/acpi.c

@@ -79 +79 @@
 void map_sdt(struct acpi_sdt_header *sdt)
 {
-        int i, cnt, length;
-
         map_page_to_frame((__address) sdt, (__address) sdt, PAGE_NOT_CACHEABLE, 0);
-        
-        length = sdt->length + ((__address) sdt) - ((__address) sdt)&0xfffff000;
-        cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0);
-        
-        for (i = 1; i < cnt; i++)
-                map_page_to_frame(((__address) sdt) + i*PAGE_SIZE, ((__address) sdt) + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0);
+        map_structure((__address) sdt, sdt->length);
 }