Changeset 5d8d71e in mainline for kernel/arch/amd64/src/boot/boot.S

Timestamp:

2009-03-03T21:17:45Z (15 years ago)

Author:

Jiri Svoboda <jirik.svoboda@…>

Branches:

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

Children:

06f96234

Parents:

c22e964

Message:

Move multiboot parsing to genarch/*/multiboot and adapt it for use with both ia32 and amd64. Multiboot info parsing now supported on amd64, too.

File:

• kernel/arch/amd64/src/boot/boot.S (modified) (1 diff)

kernel/arch/amd64/src/boot/boot.S

@@ -176 +176 @@
 start64:
         movq $(PA2KA(START_STACK)), %rsp
-        movl grub_eax, %eax
-        movl grub_ebx, %ebx
-        
-        cmpl $MULTIBOOT_LOADER_MAGIC, %eax                      # compare GRUB signature
-        je valid_boot
-                
-                xorl %ecx, %ecx                                 # no memory size or map available
-                movl %ecx, e820counter
-                
-                jmp invalid_boot
-                
-        valid_boot:
-                
-                movl (%ebx), %eax                               # ebx = physical address of struct multiboot_info
-                
-                bt $3, %eax                                     # mbi->flags[3] (mods_count, mods_addr valid)
-                jc mods_valid
-                        
-                        xorq %rcx, %rcx
-                        movq %rcx, init
-                        jmp mods_end
-                
-                mods_valid:
-                
-                xorq %rcx, %rcx
-                movl 20(%ebx), %ecx                             # mbi->mods_count
-                movq %rcx, init
-                
-                cmpl $0, %ecx
-                je mods_end
-                
-                movl 24(%ebx), %esi                             # mbi->mods_addr
-                movq $init, %rdi
-                
-                mods_loop:
-                        
-                        xorq %rdx, %rdx
-                        movl 0(%esi), %edx                      # mods->mod_start
-                        movq $0xffff800000000000, %r10
-                        addq %r10, %rdx
-                        movq %rdx, 8(%rdi)
-                        
-                        xorq %rdx, %rdx
-                        movl 4(%esi), %edx
-                        subl 0(%esi), %edx                      # mods->mod_end - mods->mod_start
-                        movq %rdx, 16(%rdi)
-                        
-                        addl $16, %esi
-                        addq $48, %rdi
-                        
-                        loop mods_loop
-                        
-                mods_end:
-                
-                bt $6, %eax                                     # mbi->flags[6] (mmap_length, mmap_addr valid)  
-                jc mmap_valid
-                        
-                        xorl %edx, %edx
-                        jmp mmap_invalid
-                        
-                mmap_valid:
-                movl 44(%ebx), %ecx                             # mbi->mmap_length
-                movl 48(%ebx), %esi                             # mbi->mmap_addr
-                movq $e820table, %rdi
-                xorl %edx, %edx
-                
-                mmap_loop:
-                        cmpl $0, %ecx
-                        jle mmap_end
-                        
-                        movl 4(%esi), %eax                      # mmap->base_addr_low
-                        movl %eax, (%rdi)
-                        
-                        movl 8(%esi), %eax                      # mmap->base_addr_high
-                        movl %eax, 4(%rdi)
-                        
-                        movl 12(%esi), %eax                     # mmap->length_low
-                        movl %eax, 8(%rdi)
-                        
-                        movl 16(%esi), %eax                     # mmap->length_high
-                        movl %eax, 12(%rdi)
-                        
-                        movl 20(%esi), %eax                     # mmap->type
-                        movl %eax, 16(%rdi)
-                        
-                        movl (%esi), %eax                       # mmap->size
-                        addl $0x4, %eax
-                        addl %eax, %esi
-                        subl %eax, %ecx
-                        addq $MEMMAP_E820_RECORD_SIZE, %rdi
-                        incl %edx
-                        jmp mmap_loop
-                
-                mmap_end:
-                
-                mmap_invalid:
-                movl %edx, e820counter
-                
-        invalid_boot:
-        
-#ifdef CONFIG_SMP
-        
-        # copy AP bootstrap routines below 1 MB
-        
-        movq $BOOT_OFFSET, %rsi
-        movq $AP_BOOT_OFFSET, %rdi
-        movq $_hardcoded_unmapped_size, %rcx
-        rep movsb
-        
-#endif
-        
-        call main_bsp   # never returns
+
+        # arch_pre_main(grub_eax, grub_ebx)
+        xorq %rdi, %rdi
+        movl grub_eax, %edi
+        xorq %rsi, %rsi
+        movl grub_ebx, %esi
+        call arch_pre_main
+
+        call main_bsp  
+
+        # Not reached.
         
         cli