ia64/linux-2.6.18-xen.hg

view arch/m68k/kernel/sun3-head.S @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 #include <linux/linkage.h>
3 #include <asm/entry.h>
4 #include <asm/page.h>
5 #include <asm/contregs.h>
6 #include <asm/sun3-head.h>
8 PSL_HIGHIPL = 0x2700
9 NBSG = 0x20000
10 ICACHE_ONLY = 0x00000009
11 CACHES_OFF = 0x00000008 | actually a clear and disable --m
12 #define MAS_STACK INT_STACK
13 ROOT_TABLE_SIZE = 128
14 PAGESIZE = 8192
15 SUN3_INVALID_PMEG = 255
16 .globl bootup_user_stack
17 .globl bootup_kernel_stack
18 .globl pg0
19 .globl swapper_pg_dir
20 .globl kernel_pmd_table
21 .globl availmem
22 .global m68k_pgtable_cachemode
23 .global kpt
24 | todo: all these should be in bss!
25 swapper_pg_dir: .skip 0x2000
26 pg0: .skip 0x2000
27 kernel_pmd_table: .skip 0x2000
29 .globl kernel_pg_dir
30 .equ kernel_pg_dir,kernel_pmd_table
32 .section .head
33 ENTRY(_stext)
34 ENTRY(_start)
36 /* Firstly, disable interrupts and set up function codes. */
37 movew #PSL_HIGHIPL, %sr
38 moveq #FC_CONTROL, %d0
39 movec %d0, %sfc
40 movec %d0, %dfc
42 /* Make sure we're in context zero. */
43 moveq #0, %d0
44 movsb %d0, AC_CONTEXT
46 /* map everything the bootloader left us into high memory, clean up the
47 excess later */
48 lea (AC_SEGMAP+0),%a0
49 lea (AC_SEGMAP+KERNBASE),%a1
50 1:
51 movsb %a0@, %d1
52 movsb %d1, %a1@
53 cmpib #SUN3_INVALID_PMEG, %d1
54 beq 2f
55 addl #NBSG,%a0
56 addl #NBSG,%a1
57 jmp 1b
59 2:
61 /* Disable caches and jump to high code. */
62 moveq #ICACHE_ONLY,%d0 | Cache disabled until we're ready to enable it
63 movc %d0, %cacr | is this the right value? (yes --m)
64 jmp 1f:l
66 /* Following code executes at high addresses (0xE000xxx). */
67 1: lea init_task,%curptr | get initial thread...
68 lea init_thread_union+THREAD_SIZE,%sp | ...and its stack.
70 /* copy bootinfo records from the loader to _end */
71 lea _end, %a1
72 lea BI_START, %a0
73 /* number of longs to copy */
74 movel %a0@, %d0
75 1: addl #4, %a0
76 movel %a0@, %a1@
77 addl #4, %a1
78 dbf %d0, 1b
80 /* Point MSP at an invalid page to trap if it's used. --m */
81 movl #(PAGESIZE),%d0
82 movc %d0,%msp
83 moveq #-1,%d0
84 movsb %d0,(AC_SEGMAP+0x0)
86 jbsr sun3_init
88 jbsr base_trap_init
90 jbsr start_kernel
91 trap #15
93 .data
94 .even
95 kpt:
96 .long 0
97 availmem:
98 .long 0
99 | todo: remove next two. --m
100 is_medusa:
101 .long 0
102 m68k_pgtable_cachemode:
103 .long 0