X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=retrocrawl;a=blobdiff_plain;f=src%2Famiga%2Fcopper.c;fp=src%2Famiga%2Fcopper.c;h=2c22d8a239c442867fbbfd62691ed2a7bf38502e;hp=0000000000000000000000000000000000000000;hb=cab072d239d772d1c3445612d2599da36b087b25;hpb=03ec5d69f5f53b61e8b6aefbcd23b0b258c6b60a

diff --git a/src/amiga/copper.c b/src/amiga/copper.c
new file mode 100644
index 0000000..2c22d8a
--- /dev/null
+++ b/src/amiga/copper.c
@@ -0,0 +1,77 @@
+#include "copper.h"
+#include "hwregs.h"
+
+uint32_t *copperlist, *copperlist_end;
+static uint32_t *copmem, *curlist;
+static int mode, copmem_size;
+
+extern uint32_t **_mem_start;
+
+int init_copper(int maxlist, int nlists)
+{
+	/* allocate and set new copper lists */
+	if(maxlist <= 0) maxlist = 256;
+	mode = nlists >= COPPER_DOUBLE ? COPPER_DOUBLE : COPPER_SINGLE;
+
+	copmem_size = maxlist * 4 * mode;
+	copmem = *_mem_start;
+
+	curlist = copperlist = copmem;
+	*curlist = COPPER_END;
+
+	if(mode == COPPER_DOUBLE) {
+		copperlist = curlist + maxlist;
+		*copperlist = COPPER_END;
+	}
+	copperlist_end = copperlist;
+
+	REG32_COP1LC = (uint32_t)curlist;
+	REG_COPJMP1 = 0;	/* causes copper to read COP1LC */
+	return 0;
+}
+
+void cleanup_copper(void)
+{
+}
+
+void enable_copper(void)
+{
+	REG_DMACON = SETBITS(DMA_COPPER);
+}
+
+void disable_copper(void)
+{
+	REG_DMACON = CLRBITS(DMA_COPPER);
+}
+
+void clear_copper(void)
+{
+	copperlist_end = copperlist;
+	*copperlist_end = COPPER_END;
+}
+
+void add_copper(uint32_t cmd)
+{
+	*copperlist_end++ = cmd;
+}
+
+void sort_copper(void)
+{
+	/* TODO */
+}
+
+void swap_copper(void)
+{
+	if(mode == COPPER_DOUBLE) {
+		uint32_t *tmpptr;
+		tmpptr = curlist;
+		curlist = copperlist;
+		copperlist = copperlist_end = tmpptr;
+
+		REG32_COP1LC = (uint32_t)curlist;
+		REG_COPJMP1 = 0;
+	} else {
+		copperlist_end = curlist;
+	}
+	*copperlist_end = COPPER_END;
+}