blob: b7e2b625914d38b36be2ab083153120204f352db (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/**
* @file bspstart.c
*
* @ingroup tms570
*
* @brief Startup code.
*/
/*
* Copyright (c) 2014 Premysl Houdek <kom541000@gmail.com>
*
* Google Summer of Code 2014 at
* Czech Technical University in Prague
* Zikova 1903/4
* 166 36 Praha 6
* Czech Republic
*
* Based on LPC24xx and LPC1768 BSP
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <bsp/tms570-pom.h>
#include <bsp/irq-generic.h>
#include <bsp/start.h>
#include <bsp/bootcard.h>
#include <bsp/linker-symbols.h>
#include <rtems/endian.h>
void bsp_start( void )
{
#if BYTE_ORDER == BIG_ENDIAN
/*
* If CPU is big endian (TMS570 family variant)
* set the CPU mode to supervisor and big endian.
* Do not set mode if CPU is little endian
* (RM48 family variant) for which default mode 0x13
* defined in cpukit/score/cpu/arm/cpu.c
* is right.
*/
arm_cpu_mode = 0x213;
#endif
tms570_initialize_and_clear();
/*
* If RTEMS image does not start at address 0x00000000
* then first level exception table at memory begin has
* to be replaced to point to RTEMS handlers addresses.
*
* There is no VBAR or other option because Cortex-R
* does provides only fixed address 0x00000000 for exceptions
* (0xFFFF0000-0xFFFF001C alternative SCTLR.V = 1 cannot
* be used because target area corersponds to PMM peripheral
* registers on TMS570).
*
* Alternative is to use jumps over SRAM based trampolines
* but that is not compatible with
* Check TCRAM1 ECC error detection logic
* which intentionally introduces data abort during startup
* to check SRAM and if exception processing goes through
* SRAM then it leads to CPU error halt.
*
* So use of POM to replace jumps to vectors target
* addresses seems to be the best option.
*/
if ( (uintptr_t)bsp_start_vector_table_begin != 0 ) {
tms570_pom_remap();
}
/* Interrupts */
bsp_interrupt_initialize();
}
|
