amiga_imgv

annotate src/amiga/copper.c @ 12:20c7238c60be

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author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 20 Nov 2017 08:36:16 +0200
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nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <exec/memory.h>
nuclear@0 3 #include <exec/libraries.h>
nuclear@0 4 #include <graphics/gfxbase.h>
nuclear@0 5 #include "copper.h"
nuclear@0 6 #include "hwregs.h"
nuclear@0 7
nuclear@0 8 uint32_t *copperlist, *copperlist_end;
nuclear@0 9 static uint32_t *copmem, *curlist;
nuclear@0 10 static void *savedlist, *savedview;
nuclear@0 11 static int mode, copmem_size;
nuclear@0 12
nuclear@0 13 struct GfxBase *GfxBase;
nuclear@0 14
nuclear@0 15 int init_copper(int maxlist, int nlists)
nuclear@0 16 {
nuclear@0 17 /* save copper list (TODO) */
nuclear@0 18 if((GfxBase = (struct GfxBase*)OpenLibrary("graphics.library", 0))) {
nuclear@0 19 savedlist = GfxBase->copinit;
nuclear@0 20 savedview = GfxBase->ActiView;
nuclear@0 21 LoadView(0);
nuclear@0 22 WaitTOF();
nuclear@0 23 WaitTOF();
nuclear@0 24
nuclear@0 25 CloseLibrary(GfxBase);
nuclear@0 26 GfxBase = 0;
nuclear@0 27 }
nuclear@0 28
nuclear@0 29 /* allocate and set new copper lists */
nuclear@0 30 if(maxlist <= 0) maxlist = 256;
nuclear@0 31 mode = nlists >= COPPER_DOUBLE ? COPPER_DOUBLE : COPPER_SINGLE;
nuclear@0 32
nuclear@0 33 copmem_size = maxlist * 4 * mode;
nuclear@0 34 if(!(copmem = (uint32_t*)AllocMem(copmem_size, MEMF_CHIP))) {
nuclear@0 35 printf("failed to allocate chip memory for %d copper lists of %d instructions\n",
nuclear@0 36 mode, maxlist);
nuclear@0 37 return -1;
nuclear@0 38 }
nuclear@0 39
nuclear@0 40 curlist = copperlist = copmem;
nuclear@0 41 *curlist = COPPER_END;
nuclear@0 42
nuclear@0 43 if(mode == COPPER_DOUBLE) {
nuclear@0 44 copperlist = curlist + maxlist;
nuclear@0 45 *copperlist = COPPER_END;
nuclear@0 46 }
nuclear@0 47 copperlist_end = copperlist;
nuclear@0 48
nuclear@0 49 REG32_COP1LC = (uint32_t)curlist;
nuclear@0 50 REG_COPJMP1 = 0; /* causes copper to read COP1LC */
nuclear@0 51 return 0;
nuclear@0 52 }
nuclear@0 53
nuclear@0 54 void cleanup_copper(void)
nuclear@0 55 {
nuclear@0 56 /* restore copper list */
nuclear@0 57 REG32_COP1LC = (uint32_t)savedlist;
nuclear@0 58
nuclear@0 59 if((GfxBase = (struct GfxBase*)OpenLibrary("graphics.library", 0))) {
nuclear@0 60 GfxBase->copinit = savedlist;
nuclear@0 61 LoadView(savedview);
nuclear@0 62 WaitTOF();
nuclear@0 63 WaitTOF();
nuclear@0 64 CloseLibrary(GfxBase);
nuclear@0 65 GfxBase = 0;
nuclear@0 66 }
nuclear@0 67
nuclear@0 68 if(copmem) {
nuclear@0 69 FreeMem(copmem, copmem_size);
nuclear@0 70 }
nuclear@0 71 }
nuclear@0 72
nuclear@0 73 void enable_copper(void)
nuclear@0 74 {
nuclear@0 75 REG_DMACON = SETBITS(DMA_COPPER);
nuclear@0 76 }
nuclear@0 77
nuclear@0 78 void disable_copper(void)
nuclear@0 79 {
nuclear@0 80 REG_DMACON = CLRBITS(DMA_COPPER);
nuclear@0 81 }
nuclear@0 82
nuclear@0 83 void clear_copper(void)
nuclear@0 84 {
nuclear@0 85 copperlist_end = copperlist;
nuclear@0 86 *copperlist_end = COPPER_END;
nuclear@0 87 }
nuclear@0 88
nuclear@0 89 void add_copper(uint32_t cmd)
nuclear@0 90 {
nuclear@0 91 *copperlist_end++ = cmd;
nuclear@0 92 }
nuclear@0 93
nuclear@0 94 void sort_copper(void)
nuclear@0 95 {
nuclear@0 96 /* TODO */
nuclear@0 97 }
nuclear@0 98
nuclear@0 99 void swap_copper(void)
nuclear@0 100 {
nuclear@0 101 if(mode == COPPER_DOUBLE) {
nuclear@0 102 uint32_t *tmpptr;
nuclear@0 103 tmpptr = curlist;
nuclear@0 104 curlist = copperlist;
nuclear@0 105 copperlist = copperlist_end = tmpptr;
nuclear@0 106
nuclear@0 107 REG32_COP1LC = (uint32_t)curlist;
nuclear@0 108 REG_COPJMP1 = 0;
nuclear@0 109 } else {
nuclear@0 110 copperlist_end = curlist;
nuclear@0 111 }
nuclear@0 112 *copperlist_end = COPPER_END;
nuclear@0 113 }