On Tue, Jun 19, 2007 at 11:28:23AM -0400, Robert P. J. Day wrote:
>
> can someone explain how the older boot-time kernel parameters were
> implemented? for example, there is apparently a boot-time parm
> "pas16=", which is parsed in the source file drivers/scsi/pas16.c:
>
> ...
> /*
> * Function : pas16_setup(char *str, int *ints)
> *
> * Purpose : LILO command line initialization of the overrides array,
> *
> * Inputs : str - unused, ints - array of integer parameters with ints[0]
> * equal to the number of ints.
> *
> */
>
> void __init pas16_setup(char *str, int *ints)
> {
> static int commandline_current = 0;
> int i;
> if (ints[0] != 2)
> printk("pas16_setup : usage pas16=io_port,irq\n");
> else
> if (commandline_current < NO_OVERRIDES) {
> overrides[commandline_current].io_port = (unsigned short) ints[1];
> overrides[commandline_current].irq = ints[2];
> for (i = 0; i < NO_BASES; ++i)
> if (bases[i].io_port == (unsigned short) ints[1]) {
> bases[i].noauto = 1;
> break;
> }
> ++commandline_current;
> }
> }
> ...
>
> note that this parameter is not defined by calling __setup() or
> early_param(), so what's the connection between saying "pas16=" at
> boot time, and how this routine is eventually invoked?
>
> i realize the comment above implies that this is a LILO thing, but
> i've been told that that's rubbish. so how does this work? thanks.
Not at all...
There was a __setup() that somehow got lost between 2.4 and 2.6
> rday
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
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