Commit | Line | Data |
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1da177e4 | 1 | #include <linux/linkage.h> |
16752e2e | 2 | #include <linux/init.h> |
1da177e4 LT |
3 | |
4 | #include <asm/entry.h> | |
5 | #include <asm/page.h> | |
6 | #include <asm/contregs.h> | |
7 | #include <asm/sun3-head.h> | |
8 | ||
9 | PSL_HIGHIPL = 0x2700 | |
10 | NBSG = 0x20000 | |
11 | ICACHE_ONLY = 0x00000009 | |
12 | CACHES_OFF = 0x00000008 | actually a clear and disable --m | |
13 | #define MAS_STACK INT_STACK | |
14 | ROOT_TABLE_SIZE = 128 | |
15 | PAGESIZE = 8192 | |
16 | SUN3_INVALID_PMEG = 255 | |
17 | .globl bootup_user_stack | |
18 | .globl bootup_kernel_stack | |
19 | .globl pg0 | |
20 | .globl swapper_pg_dir | |
21 | .globl kernel_pmd_table | |
22 | .globl availmem | |
23 | .global m68k_pgtable_cachemode | |
24 | .global kpt | |
25 | | todo: all these should be in bss! | |
26 | swapper_pg_dir: .skip 0x2000 | |
27 | pg0: .skip 0x2000 | |
28 | kernel_pmd_table: .skip 0x2000 | |
29 | ||
30 | .globl kernel_pg_dir | |
31 | .equ kernel_pg_dir,kernel_pmd_table | |
32 | ||
6f335cab | 33 | __HEAD |
1da177e4 LT |
34 | ENTRY(_stext) |
35 | ENTRY(_start) | |
36 | ||
37 | /* Firstly, disable interrupts and set up function codes. */ | |
38 | movew #PSL_HIGHIPL, %sr | |
39 | moveq #FC_CONTROL, %d0 | |
40 | movec %d0, %sfc | |
41 | movec %d0, %dfc | |
42 | ||
43 | /* Make sure we're in context zero. */ | |
44 | moveq #0, %d0 | |
45 | movsb %d0, AC_CONTEXT | |
46 | ||
47 | /* map everything the bootloader left us into high memory, clean up the | |
48 | excess later */ | |
49 | lea (AC_SEGMAP+0),%a0 | |
50 | lea (AC_SEGMAP+KERNBASE),%a1 | |
51 | 1: | |
52 | movsb %a0@, %d1 | |
53 | movsb %d1, %a1@ | |
54 | cmpib #SUN3_INVALID_PMEG, %d1 | |
55 | beq 2f | |
56 | addl #NBSG,%a0 | |
57 | addl #NBSG,%a1 | |
58 | jmp 1b | |
59 | ||
60 | 2: | |
61 | ||
62 | /* Disable caches and jump to high code. */ | |
63 | moveq #ICACHE_ONLY,%d0 | Cache disabled until we're ready to enable it | |
64 | movc %d0, %cacr | is this the right value? (yes --m) | |
65 | jmp 1f:l | |
66 | ||
67 | /* Following code executes at high addresses (0xE000xxx). */ | |
68 | 1: lea init_task,%curptr | get initial thread... | |
69 | lea init_thread_union+THREAD_SIZE,%sp | ...and its stack. | |
70 | ||
1da177e4 LT |
71 | /* Point MSP at an invalid page to trap if it's used. --m */ |
72 | movl #(PAGESIZE),%d0 | |
73 | movc %d0,%msp | |
74 | moveq #-1,%d0 | |
75 | movsb %d0,(AC_SEGMAP+0x0) | |
76 | ||
77 | jbsr sun3_init | |
78 | ||
79 | jbsr base_trap_init | |
80 | ||
81 | jbsr start_kernel | |
82 | trap #15 | |
83 | ||
84 | .data | |
85 | .even | |
86 | kpt: | |
87 | .long 0 | |
88 | availmem: | |
89 | .long 0 | |
90 | | todo: remove next two. --m | |
91 | is_medusa: | |
92 | .long 0 | |
93 | m68k_pgtable_cachemode: | |
94 | .long 0 | |
95 |