1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/copper.c	Wed Feb 21 18:00:45 2018 +0200
     1.3 @@ -0,0 +1,77 @@
     1.4 +#include "copper.h"
     1.5 +#include "hwregs.h"
     1.6 +
     1.7 +uint32_t *copperlist, *copperlist_end;
     1.8 +static uint32_t *copmem, *curlist;
     1.9 +static int mode, copmem_size;
    1.10 +
    1.11 +extern uint32_t _mem_start;
    1.12 +
    1.13 +int init_copper(int maxlist, int nlists)
    1.14 +{
    1.15 +	/* allocate and set new copper lists */
    1.16 +	if(maxlist <= 0) maxlist = 256;
    1.17 +	mode = nlists >= COPPER_DOUBLE ? COPPER_DOUBLE : COPPER_SINGLE;
    1.18 +
    1.19 +	copmem_size = maxlist * 4 * mode;
    1.20 +	copmem = (uint32_t*)_mem_start;
    1.21 +
    1.22 +	curlist = copperlist = copmem;
    1.23 +	*curlist = COPPER_END;
    1.24 +
    1.25 +	if(mode == COPPER_DOUBLE) {
    1.26 +		copperlist = curlist + maxlist;
    1.27 +		*copperlist = COPPER_END;
    1.28 +	}
    1.29 +	copperlist_end = copperlist;
    1.30 +
    1.31 +	REG32_COP1LC = (uint32_t)curlist;
    1.32 +	REG_COPJMP1 = 0;	/* causes copper to read COP1LC */
    1.33 +	return 0;
    1.34 +}
    1.35 +
    1.36 +void cleanup_copper(void)
    1.37 +{
    1.38 +}
    1.39 +
    1.40 +void enable_copper(void)
    1.41 +{
    1.42 +	REG_DMACON = SETBITS(DMA_COPPER);
    1.43 +}
    1.44 +
    1.45 +void disable_copper(void)
    1.46 +{
    1.47 +	REG_DMACON = CLRBITS(DMA_COPPER);
    1.48 +}
    1.49 +
    1.50 +void clear_copper(void)
    1.51 +{
    1.52 +	copperlist_end = copperlist;
    1.53 +	*copperlist_end = COPPER_END;
    1.54 +}
    1.55 +
    1.56 +void add_copper(uint32_t cmd)
    1.57 +{
    1.58 +	*copperlist_end++ = cmd;
    1.59 +}
    1.60 +
    1.61 +void sort_copper(void)
    1.62 +{
    1.63 +	/* TODO */
    1.64 +}
    1.65 +
    1.66 +void swap_copper(void)
    1.67 +{
    1.68 +	if(mode == COPPER_DOUBLE) {
    1.69 +		uint32_t *tmpptr;
    1.70 +		tmpptr = curlist;
    1.71 +		curlist = copperlist;
    1.72 +		copperlist = copperlist_end = tmpptr;
    1.73 +
    1.74 +		REG32_COP1LC = (uint32_t)curlist;
    1.75 +		REG_COPJMP1 = 0;
    1.76 +	} else {
    1.77 +		copperlist_end = curlist;
    1.78 +	}
    1.79 +	*copperlist_end = COPPER_END;
    1.80 +}