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[POWERPC] Uartlite: Flush RX fifo in bootwrapper

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Flush the uartlite RX fifo so that characters typed before entry into
the zImage wrapper do not muck up the kernel command line.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
This commit is contained in:
Grant Likely
2007-10-01 07:46:55 +10:00
committed by Josh Boyer
parent 267b49a96e
commit bedfc8a040
2 changed files with 11 additions and 1 deletions
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4
arch/ppc/boot/simple/misc-embedded.c
View File

@ -89,7 +89,9 @@ load_kernel(unsigned long load_addr, int num_words, unsigned long cksum, bd_t *b
* initialize the serial console port. * initialize the serial console port.
*/ */
embed_config(&bp); embed_config(&bp);
#if defined(CONFIG_SERIAL_CPM_CONSOLE) || defined(CONFIG_SERIAL_8250_CONSOLE) #if defined(CONFIG_SERIAL_CPM_CONSOLE) || \
defined(CONFIG_SERIAL_8250_CONSOLE) || \
defined(CONFIG_SERIAL_UARTLITE_CONSOLE)
com_port = serial_init(0, bp); com_port = serial_init(0, bp);
#endif #endif

8
arch/ppc/boot/simple/uartlite_tty.c
View File

@ -16,6 +16,14 @@
#define UARTLITE_BASEADDR ((void*)(XPAR_UARTLITE_0_BASEADDR)) #define UARTLITE_BASEADDR ((void*)(XPAR_UARTLITE_0_BASEADDR))
unsigned long
serial_init(int chan, void *ignored)
{
/* Clear the RX FIFO */
out_be32(UARTLITE_BASEADDR + 0x0C, 0x2);
return 0;
}
void void
serial_putc(unsigned long com_port, unsigned char c) serial_putc(unsigned long com_port, unsigned char c)
{ {