hi i am writing a video kernel driver for linux lexos and have got stuck
this is how NVIDIA do their regs
#define NV_PFIFO_RAMHT 0x00002210 /*
RW-4R */
#define NV_PFIFO_RAMHT_BASE_ADDRESS 8:4 /*
RWIUF */
#define NV_PFIFO_RAMHT_BASE_ADDRESS_10000 0x00000010 /*
RWI-V */
#define NV_PFIFO_RAMHT_SIZE 17:16 /*
RWIUF */
#define NV_PFIFO_RAMHT_SIZE_4K 0x00000000 /*
RWI-V */
#define NV_PFIFO_RAMHT_SIZE_8K 0x00000001 /*
RW--V */
#define NV_PFIFO_RAMHT_SIZE_16K 0x00000002 /*
RW--V */
#define NV_PFIFO_RAMHT_SIZE_32K 0x00000003 /*
RW--V */
#define NV_PFIFO_RAMHT_SEARCH 25:24 /*
RWIUF */
#define NV_PFIFO_RAMHT_SEARCH_16 0x00000000 /*
RWI-V */
#define NV_PFIFO_RAMHT_SEARCH_32 0x00000001 /*
RW--V */
#define NV_PFIFO_RAMHT_SEARCH_64 0x00000002 /*
RW--V */
#define NV_PFIFO_RAMHT_SEARCH_128 0x00000003 /*
RW--V */
this can be used like setreg( NV_PFIFO_RAMHT , htbase << ( 0 ?
NV_PFIFO_RAMHT_BASE_ADDRESS)) ;
but i wont to make it better so i tried it this way
#define NV_PFIFO_RAMHT_BASE_ADDRESS 0x00002210:8:4:3 /* address : high
bit : low bit : mode 3 = rw
this seemed much better all on one line so you can do
setreg(NV_PFIFO_RAMHT_BASE_ADDRESS , htbase) ;
but ( 2 ? 1:2:3 ) dose not work
and NV_PFIFO_RAMHT_BASE_ADDRESS 0x00002210,8,4,3 dose not work as
setreg(a,h,l,m) thinks this is
all one agr
the other would be to have it as a big struct
but then compiler can not optimize it ( i think )
if i can use #define 's the it quicker and setreg can be an inline asm
marco
how would it work if i used 64 bit like this
bits 32 - 63 reg address
bits 24 - 31 high bit
bits 16 - 23 low bit
bits 0 - 7 mode
#define NV_PFIFO_RAMHT_BASE_ADDRESS 0x0000221008040003
so if i sent this to the setreg(unsigned long long , data) asm macro it
would be in EAX:EDX (64 bit)
can the kernel use (long long) and (unsigned long long) ( 64 bit ints)
that 64 bit way look good but is it ?
( opps i wold need an extr 32 bits for value but can
have 64:32 i think )
has anyone got any help they can give me on this !please email me thank
you!
as i am stuck
also is there a down loadable book on c++ as i am just learning from
others ppl code and really
need a book to do it right
thank you david rundle <sector2@ihug.co.nz>
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