Changeset dcbc8be in mainline for arch/ia32/include

Timestamp:

2005-06-02T23:56:26Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

ac5d02b

Parents:

7dcbc0a1

Message:

Big changes in IA-32 address space map.
Now the kernel is mapped above 0x80000000. Finally!
Userspace address space starts at 0x00000000.
Changes in many places.
This improvement temporarily breaks SMP and most likely also other stuff.
Supported size of memory is now only 4M as it is the biggest size that can be mapped at once on IA-32.

Changes in linker script.
Changes required because of the above.
Do not patch hardcoded_* variables but assign to them instead.

Cosmetic changes here and there.

Location:

arch/ia32/include

Files:

• mm/page.h (modified) (1 diff)
• mm/vm.h (modified) (1 diff)
• pm.h (modified) (1 diff)

arch/ia32/include/mm/page.h

@@ -35 +35 @@
 #define PAGE_SIZE       FRAME_SIZE
 
-#define KA2PA(x)        (x)
-#define PA2KA(x)        (x)
+#define KA2PA(x)        ((x) - 0x80000000)
+#define PA2KA(x)        ((x) + 0x80000000)
 
 struct page_specifier {

arch/ia32/include/mm/vm.h

@@ -32 +32 @@
 #include <arch/types.h>
 
-#define KERNEL_ADDRESS_SPACE_START_ARCH         (__address) 0x0
-#define KERNEL_ADDRESS_SPACE_END_ARCH           (__address) 0x3fffffff
-#define USER_ADDRESS_SPACE_START_ARCH           (__address) 0x40000000
-#define USER_ADDRESS_SPACE_END_ARCH             (__address) 0xffffffff  
+#define KERNEL_ADDRESS_SPACE_START_ARCH         (__address) 0x80000000
+#define KERNEL_ADDRESS_SPACE_END_ARCH           (__address) 0xffffffff  
+#define USER_ADDRESS_SPACE_START_ARCH           (__address) 0x00000000
+#define USER_ADDRESS_SPACE_END_ARCH             (__address) 0x7fffffff
 
-#define UTEXT_ADDRESS_ARCH      0x40000000
-#define USTACK_ADDRESS_ARCH     0xfffff000
-#define UDATA_ADDRESS_ARCH      0x41000000
+#define UTEXT_ADDRESS_ARCH      0x00001000
+#define USTACK_ADDRESS_ARCH     (0x7fffffffUL-(PAGE_SIZE-1))
+#define UDATA_ADDRESS_ARCH      0x21000000
 
 #endif

arch/ia32/include/pm.h

@@ -138 +138 @@
 
 extern void gdt_setbase(struct descriptor *d, __address base);
-extern void gdt_setlimit(struct descriptor *d, __address limit);
+extern void gdt_setlimit(struct descriptor *d, __u32 limit);
 
 extern void idt_init(void);