1 |
786 |
skrzyp |
#ifndef CYGONCE_HAL_HALBOOT_SI /* -*-asm-*- */
|
2 |
|
|
#define CYGONCE_HAL_HALBOOT_SI
|
3 |
|
|
// ====================================================================
|
4 |
|
|
//
|
5 |
|
|
// /halboot.si
|
6 |
|
|
//
|
7 |
|
|
// HAL bootup platform-oriented code (assembler)
|
8 |
|
|
//
|
9 |
|
|
// ====================================================================
|
10 |
|
|
// ####ECOSGPLCOPYRIGHTBEGIN####
|
11 |
|
|
// -------------------------------------------
|
12 |
|
|
// This file is part of eCos, the Embedded Configurable Operating System.
|
13 |
|
|
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
|
14 |
|
|
//
|
15 |
|
|
// eCos is free software; you can redistribute it and/or modify it under
|
16 |
|
|
// the terms of the GNU General Public License as published by the Free
|
17 |
|
|
// Software Foundation; either version 2 or (at your option) any later
|
18 |
|
|
// version.
|
19 |
|
|
//
|
20 |
|
|
// eCos is distributed in the hope that it will be useful, but WITHOUT
|
21 |
|
|
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
22 |
|
|
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
23 |
|
|
// for more details.
|
24 |
|
|
//
|
25 |
|
|
// You should have received a copy of the GNU General Public License
|
26 |
|
|
// along with eCos; if not, write to the Free Software Foundation, Inc.,
|
27 |
|
|
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
28 |
|
|
//
|
29 |
|
|
// As a special exception, if other files instantiate templates or use
|
30 |
|
|
// macros or inline functions from this file, or you compile this file
|
31 |
|
|
// and link it with other works to produce a work based on this file,
|
32 |
|
|
// this file does not by itself cause the resulting work to be covered by
|
33 |
|
|
// the GNU General Public License. However the source code for this file
|
34 |
|
|
// must still be made available in accordance with section (3) of the GNU
|
35 |
|
|
// General Public License v2.
|
36 |
|
|
//
|
37 |
|
|
// This exception does not invalidate any other reasons why a work based
|
38 |
|
|
// on this file might be covered by the GNU General Public License.
|
39 |
|
|
// -------------------------------------------
|
40 |
|
|
// ####ECOSGPLCOPYRIGHTEND####
|
41 |
|
|
// ====================================================================
|
42 |
|
|
//#####DESCRIPTIONBEGIN####
|
43 |
|
|
//
|
44 |
|
|
// Author(s): hmt
|
45 |
|
|
// Contributors: hmt
|
46 |
|
|
// Date: 1999-02-01
|
47 |
|
|
// Purpose: Bootup code, platform oriented.
|
48 |
|
|
// Description:
|
49 |
|
|
//
|
50 |
|
|
//####DESCRIPTIONEND####
|
51 |
|
|
//
|
52 |
|
|
// ====================================================================
|
53 |
|
|
|
54 |
|
|
// External Platform Initial Setup
|
55 |
|
|
//
|
56 |
|
|
// This should set up RAM and caches, and calm down any external
|
57 |
|
|
// interrupt sources.
|
58 |
|
|
//
|
59 |
|
|
// It is just plain included in vectors.S
|
60 |
|
|
//
|
61 |
|
|
// RAM has not yet been touched at all; in fact all you have is a
|
62 |
|
|
// register window selected.
|
63 |
|
|
|
64 |
|
|
|
65 |
|
|
! Empty macro for debugging vectors.S
|
66 |
|
|
.macro led val
|
67 |
|
|
.endm
|
68 |
|
|
|
69 |
|
|
! First of all - before setting up the stack - set
|
70 |
|
|
! the available memory to the full 4Mb;
|
71 |
|
|
#define MEC_MEMCFG (0x01f80010)
|
72 |
|
|
sethi %hi( MEC_MEMCFG ), %g1
|
73 |
|
|
ld [ %g1 + %lo(MEC_MEMCFG) ], %g2
|
74 |
|
|
mov 7, %g3
|
75 |
|
|
sll %g3, 10, %g3 ! Bits 10,11,12 are of interest
|
76 |
|
|
andn %g2, %g3, %g2
|
77 |
|
|
mov 4, %g3
|
78 |
|
|
sll %g3, 10, %g3 ! Bits 10,11,12 are of interest
|
79 |
|
|
or %g2, %g3, %g2 ! Shift 256k left 4 times to
|
80 |
|
|
st %g2, [ %g1 + %lo(MEC_MEMCFG) ]
|
81 |
|
|
! ...give memsize of 4Mb
|
82 |
|
|
|
83 |
|
|
! then copy the branch instructions into the vector
|
84 |
|
|
rd %tbr, %g1
|
85 |
|
|
andn %g1, 0xfff, %g1 ! clear non-address bits
|
86 |
|
|
sethi %hi(real_vector_instructions), %l0
|
87 |
|
|
or %l0, %lo(real_vector_instructions), %l0
|
88 |
|
|
ld [ %l0 ], %l1
|
89 |
|
|
st %l1, [ %g1 ] ! into the vector
|
90 |
|
|
ld [ %l0 + 4 ], %l1
|
91 |
|
|
st %l1, [ %g1 + 4 ] ! into the vector
|
92 |
|
|
|
93 |
|
|
#endif /* CYGONCE_HAL_HALBOOT_SI */
|
94 |
|
|
/* EOF halboot.si */
|