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clear BaS data segment at start

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This commit is contained in:
Markus Fröschle
2013-08-01 05:46:39 +00:00
parent 20b62d63b2
commit 2a9a57eeea
2 changed files with 23 additions and 2 deletions
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3
bas.lk.in
View File

@@ -51,7 +51,10 @@ SECTIONS
*/ */
AT (ALIGN(ADDR(.text) + SIZEOF(.text), 4)) AT (ALIGN(ADDR(.text) + SIZEOF(.text), 4))
{ {
__BAS_DATA_START = .;
*(.data) *(.data)
. = ALIGN(16);
__BAS_DATA_END = .;
*(.bss) *(.bss)
/* The BaS copy routine assumes that tha BaS size /* The BaS copy routine assumes that tha BaS size

22
sources/sysinit.c
View File

@@ -812,6 +812,21 @@ extern uint8_t _BAS_SIZE[];
extern uint8_t _FASTRAM_END[]; extern uint8_t _FASTRAM_END[];
#define FASTRAM_END ((uint32_t)_FASTRAM_END) #define FASTRAM_END ((uint32_t)_FASTRAM_END)
void clear_datasegment(void)
{
uint16_t *p;
extern uint16_t _BAS_DATA_START[];
uint16_t *BAS_DATA_START = &_BAS_DATA_START[0];
extern uint16_t _BAS_DATA_END[];
uint16_t *BAS_DATA_END = &_BAS_DATA_END[0];
p = BAS_DATA_START;
while (p < BAS_DATA_END)
{
*p++ = 0L;
}
}
void initialize_hardware(void) { void initialize_hardware(void) {
/* Test for FireTOS switch: DIP switch #5 up */ /* Test for FireTOS switch: DIP switch #5 up */
if (!(DIP_SWITCH & (1 << 6))) { if (!(DIP_SWITCH & (1 << 6))) {
@@ -841,14 +856,17 @@ void initialize_hardware(void) {
return; return;
} }
clear_datasegment();
init_gpio(); init_gpio();
init_serial(); init_serial();
xprintf("\n\n");
xprintf("Firebee BASIS system (BaS) v %d.%d (%s, %s)\r\n\r\n", MAJOR_VERSION, MINOR_VERSION, __DATE__, __TIME__);
/* /*
* Determine cause(s) of Reset * Determine cause(s) of Reset
*/ */
xprintf("\n\n");
xprintf("Firebee BASIS system (BaS) v %d.%d (%s, %s)\r\n\r\n", MAJOR_VERSION, MINOR_VERSION, __DATE__, __TIME__);
if (MCF_SIU_RSR & MCF_SIU_RSR_RST) if (MCF_SIU_RSR & MCF_SIU_RSR_RST)
xprintf("Reset. Cause: External Reset\r\n"); xprintf("Reset. Cause: External Reset\r\n");
if (MCF_SIU_RSR & MCF_SIU_RSR_RSTWD) if (MCF_SIU_RSR & MCF_SIU_RSR_RSTWD)