Philip Brown wrote:
> Hi folks,
>
> could someone take 1 minute and run through agpgart.h,
> just taking a look at the structs for the ioctls,
> and add comments for which "page" fields are ADDRESSES, vs which
> page fields are INDEXES/page-counts. My head's beginning to spin.
> I'll narrow it down for ya:
>
> typedef struct _agp_segment {
> off_t pg_start; /* starting page to populate */
> size_t pg_count; /* number of pages */
>
> typedef struct _agp_bind {
> off_t pg_start; /* starting page to populate */
>
> typedef struct _agp_allocate {
> size_t pg_count; /* number of pages */
> [Is this really "number of pages", or is it actually
> "amount of memory"? If really "number of pages",
> then WHY ISNT IT AN INT?!!]
From what is in the code, AFAI understand, this *is* really the number
of pages. And 'size_t' is nothing but an 'unsigned int' (in Linux at
least...). Here is the relevant excerpt from 'malloc.h' :
# undef size_t
# define size_t unsigned int
It looks like every '*_start' field is an adress, while every '*_count'
is a number of pages...
a+
--
Nicolas Aspert Signal Processing Laboratory (LTS)
Swiss Federal Institute of Technology (EPFL)
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