diff options
Diffstat (limited to 'src/dma3_manager.c')
| -rw-r--r-- | src/dma3_manager.c | 52 |
1 files changed, 31 insertions, 21 deletions
diff --git a/src/dma3_manager.c b/src/dma3_manager.c index 6d12dec05..bb015c5cf 100644 --- a/src/dma3_manager.c +++ b/src/dma3_manager.c @@ -1,12 +1,23 @@ #include "global.h" #include "dma3.h" +IWRAM_DATA struct { + /* 0x00 */ const u8 *src; + /* 0x04 */ u8 *dest; + /* 0x08 */ u16 size; + /* 0x0A */ u16 mode; + /* 0x0C */ u32 value; +} gDma3Requests[128]; + +static bool8 gDma3ManagerLocked; +static u8 gDma3RequestCursor; + void ClearDma3Requests(void) { int i; gDma3ManagerLocked = TRUE; - gDma3RequestCursor = FALSE; + gDma3RequestCursor = 0; for(i = 0; i < (u8)ARRAY_COUNT(gDma3Requests); i++) { @@ -14,7 +25,7 @@ void ClearDma3Requests(void) gDma3Requests[i].src = 0; gDma3Requests[i].dest = 0; } - + gDma3ManagerLocked = FALSE; } @@ -22,9 +33,8 @@ void ClearDma3Requests(void) void ProcessDma3Requests(void) { // NOTE: the fillerA member of the DMA struct is actually u32 value; - // NOTE: gUnknown_0300001C is just a pointer inside the gDma3Requests structure, not a true symbol; feel free to remove u16 total_size; - + if (gDma3ManagerLocked) return; @@ -34,7 +44,7 @@ void ProcessDma3Requests(void) while (gDma3Requests[gDma3RequestCursor].size) { total_size += gDma3Requests[gDma3RequestCursor].size; - + if (total_size > 0xA000) return; // don't do too much at once @@ -90,14 +100,14 @@ void ProcessDma3Requests(void) } DmaFill16(3, gDma3Requests[gDma3RequestCursor].value, gDma3Requests[gDma3RequestCursor].dest, gDma3Requests[gDma3RequestCursor].size); break; - } - gDma3Requests[gDma3RequestCursor].src = 0; - gDma3Requests[gDma3RequestCursor].dest = 0; + } + gDma3Requests[gDma3RequestCursor].src = NULL; + gDma3Requests[gDma3RequestCursor].dest = NULL; gDma3Requests[gDma3RequestCursor].size = 0; gDma3Requests[gDma3RequestCursor].mode = 0; gDma3Requests[gDma3RequestCursor].value = 0; gDma3RequestCursor++; - + if (gDma3RequestCursor >= 128) // loop back to the first DMA request gDma3RequestCursor = 0; } @@ -331,7 +341,7 @@ _08000DB2:\n\ mov r5, r12\n\ ldrb r0, [r5]\n\ lsls r0, 4\n\ - ldr r3, =gUnknown_0300001C\n\ + ldr r3, =gDma3Requests + 0x0C\n\ adds r0, r3\n\ ldr r0, [r0]\n\ strh r0, [r1]\n\ @@ -347,7 +357,7 @@ _08000DB2:\n\ bhi _08000DB2\n\ ldrb r0, [r5]\n\ lsls r0, 4\n\ - ldr r5, =gUnknown_0300001C\n\ + ldr r5, =gDma3Requests + 0x0C\n\ adds r0, r5\n\ ldr r0, [r0]\n\ strh r0, [r1]\n\ @@ -419,13 +429,13 @@ _08000E46:\n\ } #endif -int RequestDma3Copy(void *src, void *dest, u16 size, u8 mode) +int RequestDma3Copy(const void *src, void *dest, u16 size, u8 mode) { int cursor; int var = 0; - + gDma3ManagerLocked = 1; - + cursor = gDma3RequestCursor; while(1) { @@ -434,12 +444,12 @@ int RequestDma3Copy(void *src, void *dest, u16 size, u8 mode) gDma3Requests[cursor].src = src; gDma3Requests[cursor].dest = dest; gDma3Requests[cursor].size = size; - + if(mode == 1) gDma3Requests[cursor].mode = mode; else gDma3Requests[cursor].mode = 3; - + gDma3ManagerLocked = FALSE; return (s16)cursor; } @@ -460,10 +470,10 @@ int RequestDma3Fill(s32 value, void *dest, u16 size, u8 mode) { int cursor; int var = 0; - + cursor = gDma3RequestCursor; gDma3ManagerLocked = 1; - + while(1) { if(!gDma3Requests[cursor].size) @@ -477,7 +487,7 @@ int RequestDma3Fill(s32 value, void *dest, u16 size, u8 mode) gDma3Requests[cursor].mode = 2; else gDma3Requests[cursor].mode = 4; - + gDma3ManagerLocked = FALSE; return (s16)cursor; } @@ -503,9 +513,9 @@ int CheckForSpaceForDma3Request(s16 index) for (; current < 0x80; current ++) if (gDma3Requests[current].size) return -1; - + return 0; - } + } if (gDma3Requests[index].size) return -1; |