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made stack location symbolic

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This commit is contained in:
Markus Fröschle
2014-08-10 17:19:10 +00:00
parent 6befb6fc46
commit 699ae1917b
1 changed files with 14 additions and 10 deletions
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24
tos/jtagwait/sources/jtagwait.c
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@@ -15,6 +15,10 @@ extern long _FPGA_JTAG_VALID;
#define FPGA_CONFIG (1 << 2) #define FPGA_CONFIG (1 << 2)
#define FPGA_CONF_DONE (1 << 5) #define FPGA_CONF_DONE (1 << 5)
#define SRAM1_START 0xff101000
#define SRAM1_END SRAM1_START + 0x1000
#define SAFE_STACK SRAM1_END - 4
long bas_start = 0xe0000000; long bas_start = 0xe0000000;
void wait_for_jtag(void) void wait_for_jtag(void)
@@ -23,11 +27,11 @@ void wait_for_jtag(void)
/* set supervisor stack to end of SRAM1 */ /* set supervisor stack to end of SRAM1 */
__asm__ __volatile__ ( __asm__ __volatile__ (
" move #0x2700,sr\n\t" /* disable interrupts */ " move #0x2700,sr\n\t" /* disable interrupts */
" move.l #0xff101000 + 0x1000 - 4,d0\n\t" /* 4KB on-chip core SRAM1 */ " move.l %[stack],d0\n\t" /* 4KB on-chip core SRAM1 */
" move.l d0,sp\n\t" /* set stack pointer */ " move.l d0,sp\n\t" /* set stack pointer */
:
: :
: [stack] "i" (SAFE_STACK)
: "d0", "cc" /* clobber */ : "d0", "cc" /* clobber */
); );
@@ -46,19 +50,19 @@ void wait_for_jtag(void)
MCF_GPIO_PDDR_FEC1L_PDDR_FEC1L4; /* bit 4 = LED => output */ MCF_GPIO_PDDR_FEC1L_PDDR_FEC1L4; /* bit 4 = LED => output */
/* all other bits = input */ /* all other bits = input */
xprintf("waiting for JTAG configuration start\r\n");
/* /*
* now that this GPIO ports have been switched to input, we can poll for FPGA config * now that GPIO ports have been switched to input, we can poll for FPGA config
* started from the JTAG interface (CONF_DONE goes low) and finish (CONF_DONE goes high) * started from the JTAG interface (CONF_DONE goes low) and finish (CONF_DONE goes high)
*/ */
xprintf("waiting for JTAG configuration start\r\n");
while ((MCF_GPIO_PPDSDR_FEC1L & FPGA_CONF_DONE)); /* wait for JTAG config load started */ while ((MCF_GPIO_PPDSDR_FEC1L & FPGA_CONF_DONE)); /* wait for JTAG config load started */
xprintf("waiting for JTAG configuration finished\r\n"); xprintf("waiting for JTAG configuration to finish\r\n");
while (!(MCF_GPIO_PPDSDR_FEC1L & FPGA_CONF_DONE)); /* wait for JTAG config load finished */ while (!(MCF_GPIO_PPDSDR_FEC1L & FPGA_CONF_DONE)); /* wait for JTAG config load finished */
xprintf("JTAG configuration finished.\r\n"); xprintf("JTAG configuration finished.\r\n");
_FPGA_JTAG_LOADED = true; /* indicate jtag loaded FPGA config to BaS */ _FPGA_JTAG_LOADED = true; /* indicate jtag loaded FPGA config to BaS */
_FPGA_JTAG_VALID = VALID_JTAG; _FPGA_JTAG_VALID = VALID_JTAG; /* set magic word to indicate _FPGA_JTAG_LOADED is valid */
/* wait */ /* wait */
xprintf("wait a little to let things settle...\r\n"); xprintf("wait a little to let things settle...\r\n");
@@ -95,7 +99,7 @@ int main(int argc, char *argv[])
*/ */
bas_start = (long) addr; bas_start = (long) addr;
printf("BaS start address set to %p\r\n", addr); printf("BaS start address set to %p\r\n", (void *) bas_start);
} }
else else
{ {