Changeset 06e6805 in mainline for arch/ppc32/src/boot/boot.S

Timestamp:

2006-03-14T11:08:44Z (19 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

4bb4836d

Parents:

d1f8a87

Message:

ppc32: get memory map from loader

File:

• arch/ppc32/src/boot/boot.S (moved) (moved from arch/ppc32/src/start.S ) (1 diff)

arch/ppc32/src/boot/boot.S

@@ -29 +29 @@
 #include <arch/asm/regname.h>
 #include <arch/asm/spr.h>
+#include <arch/boot/boot.h>
+#include <arch/boot/memmap.h>
 
 .section K_TEXT_START
 
 .global kernel_image_start
+kernel_image_start:
+        
+        # r10 contains physical address to memmap_t
+        # from boot loader
+        
+        lis r4, 0x80000000@ha
+        addi r4, r4, 0x80000000@l
+        
+        add r10, r10, r4
 
-kernel_image_start:
+        lis r4, memmap@ha
+        addi r4, r4, memmap@l    # r4 = memmap
+        
+        lwz r5, 0(r10)           # memmap->total
+        stw r5, 0(r4)
+        
+        lwzu r5, 4(r10)           # memmap->count
+        stwu r5, 4(r4)
+        
+        cmpwi r5, 0
+        beq memmap_end
+        
+        mtctr r5
+        memmap_loop:
+        
+                lwzu r5, 4(r10)           # memmap->zones[i].start
+                stwu r5, 4(r4)
+                
+                lwzu r5, 4(r10)           # memmap->zones[i].size
+                stwu r5, 4(r4)
+        
+        bdnz memmap_loop
+        memmap_end:
+        
         b main_bsp