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nios2: pass command line and initrd to linux in bootm.c

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This patch adds bootargs passing to nios2 linux.

The args passing is enabled with,
r4 : 'NIOS' magic
r5 : pointer to initrd start
r6 : pointer to initrd end
r7 : pointer to command line

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
This commit is contained in:
Thomas Chou 2010-03-24 11:41:46 +08:00 • committed by Scott McNutt
parent 9e486ab1c9
commit ed29415784
1 changed files with 12 additions and 7 deletions
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19
lib_nios2/bootm.c
View file

@ -26,21 +26,26 @@
#include <asm/byteorder.h>
#include <asm/cache.h>
#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
{
void (*kernel)(void) = (void (*)(void))images->ep;
void (*kernel)(int, int, int, char *) = (void *)images->ep;
char *commandline = getenv("bootargs");
ulong initrd_start = images->rd_start;
ulong initrd_end = images->rd_end;
if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
return 1;
/* flushes data and instruction caches before calling the kernel */
flush_dcache (0,CONFIG_SYS_DCACHE_SIZE);
flush_icache (0,CONFIG_SYS_ICACHE_SIZE);
disable_interrupts();
flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
/* For now we assume the Microtronix linux ... which only
* needs to be called ;-)
*/
kernel ();
debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
/* does not return */
return 1;