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debug feature: jtagtcpip, improve performance

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waiting for ZY1000 fifo to idle is now queued as
an asynchronous command. This radically improves
performance when waitIdle() is interspersed with
writes as no readback is required over TCP/IP.

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>
This commit is contained in:
Øyvind Harboe 2010-07-16 10:57:28 +02:00
parent bb588bdaec
commit 01b2a3091a
2 changed files with 26 additions and 0 deletions
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4
src/jtag/zy1000/jtag_minidriver.h
View File

@ -48,6 +48,7 @@ extern uint32_t zy1000_tcpin(uint32_t address);
#if BUILD_ECOSBOARD
// FIFO empty?
static __inline__ void waitIdle(void)
{
@ -57,6 +58,9 @@ static __inline__ void waitIdle(void)
ZY1000_PEEK(ZY1000_JTAG_BASE + 0x10, empty);
} while ((empty & 0x100) == 0);
}
#else
extern void waitIdle(void);
#endif
static __inline__ void waitQueue(void)
{

22
src/jtag/zy1000/zy1000.c
View File

@ -1107,6 +1107,7 @@ enum ZY1000_CMD
ZY1000_CMD_POKE = 0x0,
ZY1000_CMD_PEEK = 0x8,
ZY1000_CMD_SLEEP = 0x1,
ZY1000_CMD_WAITIDLE = 2
};
@ -1167,6 +1168,22 @@ void zy1000_tcpout(uint32_t address, uint32_t data)
}
}
/* By sending the wait to the server, we avoid a readback
* of status. Radically improves performance for this operation
* with long ping times.
*/
void waitIdle(void)
{
tcpip_open();
if (!writeLong((ZY1000_CMD_WAITIDLE << 24)))
{
fprintf(stderr, "Could not write to zy1000 server\n");
exit(-1);
}
}
uint32_t zy1000_tcpin(uint32_t address)
{
tcpip_open();
@ -1241,6 +1258,11 @@ static void tcpipserver(void)
jtag_sleep(data);
break;
}
case ZY1000_CMD_WAITIDLE:
{
waitIdle();
break;
}
default:
return;
}