URL https://opencores.org/ocsvn/or1k_old/or1k_old/trunk

Subversion Repositories or1k_old

[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [armnommu/] [kernel/] [head-armo.S] - Blame information for rev 1782

Details | Compare with Previous | View Log


/*
 * linux/arch/arm/kernel/head.S
 *
 * Copyright (C) 1994, 1995, 1996, 1997 Russell King
 *
 * 26-bit kernel startup code
 */
                .text
                .align
                .global __stext
                .global __entry
/*
 * Entry point.
 */
__stext:
__entry:        cmp     pc, #0x02000000
                ldrlt   pc, LC1                 @ if 0x01800000, call at 0x02080000
                teq     r0, #0                  @ Check for old calling method
                blne    Loldparams              @ Move page if old
                adr     r5, LC0
                ldmia   r5, {r5, r6, sl, sp}    @ Setup stack
                mov     r4, #0
1:              cmp     r5, sl                  @ Clear BSS
                strcc   r4, [r5], #4
                bcc     1b
                mov     r0, #0xea000000         @ Point undef instr to continuation
                adr     r5, Lcontinue - 12
                orr     r5, r0, r5, lsr #2
                str     r5, [r4, #4]
                mov     r2, r4
                ldr     r5, Larm2_id
                swp     r0, r0, [r2]            @ check for swp (ARM2 can't)
                ldr     r5, Larm250_id
                mrc     15, 0, r0, c0, c0       @ check for CP#15 (ARM250 can't)
                mov     r5, r0                  @ Use processor ID if we do have CP#15
Lcontinue:      str     r5, [r6]
                mov     r5, #0xeb000000         @ Point undef instr vector to itself
                sub     r5, r5, #2
                str     r5, [r4, #4]
                mov     fp, #0
                b       _start_kernel
 
LC1:            .word   __stext
LC0:            .word   _edata
                .word   _arm_id
                .word   _end
                .word   _init_user_stack + 4096
Larm2_id:       .long   0x41560200
Larm250_id:     .long   0x41560250
                .align
 
Loldparams:     mov     r4, #0x02000000
                add     r3, r4, #0x00080000
                add     r4, r4, #0x0007c000
1:              ldmia   r0!, {r5 - r12}
                stmia   r4!, {r5 - r12}
                cmp     r4, r3
                blt     1b
                movs    pc, lr

Line No.	Rev	Author	Line
1	1622	jcastillo	`/*`
2			`* linux/arch/arm/kernel/head.S`
3			`*`
4			`* Copyright (C) 1994, 1995, 1996, 1997 Russell King`
5			`*`
6			`* 26-bit kernel startup code`
7			`*/`
8			`.text`
9			`.align`
10			`.global __stext`
11			`.global __entry`
12			`/*`
13			`* Entry point.`
14			`*/`
15			`__stext:`
16			`__entry: cmp pc, #0x02000000`
17			`ldrlt pc, LC1 @ if 0x01800000, call at 0x02080000`
18			`teq r0, #0 @ Check for old calling method`
19			`blne Loldparams @ Move page if old`
20			`adr r5, LC0`
21			`ldmia r5, {r5, r6, sl, sp} @ Setup stack`
22			`mov r4, #0`
23			`1: cmp r5, sl @ Clear BSS`
24			`strcc r4, [r5], #4`
25			`bcc 1b`
26			`mov r0, #0xea000000 @ Point undef instr to continuation`
27			`adr r5, Lcontinue - 12`
28			`orr r5, r0, r5, lsr #2`
29			`str r5, [r4, #4]`
30			`mov r2, r4`
31			`ldr r5, Larm2_id`
32			`swp r0, r0, [r2] @ check for swp (ARM2 can't)`
33			`ldr r5, Larm250_id`
34			`mrc 15, 0, r0, c0, c0 @ check for CP#15 (ARM250 can't)`
35			`mov r5, r0 @ Use processor ID if we do have CP#15`
36			`Lcontinue: str r5, [r6]`
37			`mov r5, #0xeb000000 @ Point undef instr vector to itself`
38			`sub r5, r5, #2`
39			`str r5, [r4, #4]`
40			`mov fp, #0`
41			`b _start_kernel`
42
43			`LC1: .word __stext`
44			`LC0: .word _edata`
45			`.word _arm_id`
46			`.word _end`
47			`.word _init_user_stack + 4096`
48			`Larm2_id: .long 0x41560200`
49			`Larm250_id: .long 0x41560250`
50			`.align`
51
52			`Loldparams: mov r4, #0x02000000`
53			`add r3, r4, #0x00080000`
54			`add r4, r4, #0x0007c000`
55			`1: ldmia r0!, {r5 - r12}`
56			`stmia r4!, {r5 - r12}`
57			`cmp r4, r3`
58			`blt 1b`
59			`movs pc, lr`

Browse

Tools

Subversion Repositories or1k_old

[/] [or1k_old/] [trunk/] [rc203soc/] [sw/] [uClinux/] [arch/] [armnommu/] [kernel/] [head-armo.S] - Blame information for rev 1782