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Merged
Ryzee119 merged 1 commit into from
Sep 8, 2025
+69 −62
Merged

pbkit: Expose graphics context registration #758

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112 changes: 53 additions & 59 deletions lib/pbkit/pbkit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -43,16 +43,6 @@
#define ADDR_FBMEM 2
#define ADDR_AGPMEM 3

#define DMA_CLASS_2 2
#define DMA_CLASS_3 3
#define DMA_CLASS_3D 0x3D

#define GR_CLASS_30 0x30
#define GR_CLASS_39 0x39
#define GR_CLASS_62 0x62
#define GR_CLASS_97 0x97
#define GR_CLASS_9F 0x9F

#define GPU_IRQ 3

#define XTAL_16MHZ 16.6667f
Expand Down Expand Up @@ -1128,11 +1118,11 @@ static void pb_prepare_tiles(void)



static void pb_create_dma_ctx( DWORD ChannelID,
DWORD Class,
DWORD Base,
DWORD Limit,
struct s_CtxDma *pDmaObject )
void pb_create_dma_ctx(DWORD ChannelID,
DWORD Class,
DWORD Base,
DWORD Limit,
struct s_CtxDma *pDmaObject)
{
DWORD Addr;
DWORD AddrSpace;
Expand Down Expand Up @@ -1177,7 +1167,7 @@ static void pb_create_dma_ctx( DWORD ChannelID,



static void pb_bind_channel(struct s_CtxDma *pCtxDmaObject)
void pb_bind_channel(struct s_CtxDma *pCtxDmaObject)
{
DWORD entry;
DWORD *p;
Expand Down Expand Up @@ -1408,70 +1398,73 @@ static void pb_3D_init(void)
#endif
}

static inline void pb_create_gr_instance(int ChannelID,
int Class,
DWORD instance,
DWORD flags,
DWORD flags3D,
struct s_CtxDma *pGrObject)
{
DWORD offset = instance << 4;
VIDEOREG(NV_PRAMIN + offset + 0x00) = flags;
VIDEOREG(NV_PRAMIN + offset + 0x04) = flags3D;
VIDEOREG(NV_PRAMIN + offset + 0x08) = 0;
VIDEOREG(NV_PRAMIN + offset + 0x0C) = 0;

memset(pGrObject,0,sizeof(struct s_CtxDma));

pGrObject->ChannelID = ChannelID;
pGrObject->Class = Class;
pGrObject->isGr = 1;
pGrObject->Inst = instance;
}


static void pb_create_gr_ctx( int ChannelID,
int Class,
struct s_CtxDma *pGrObject )
void pb_create_gr_ctx(int ChannelID,
int Class,
struct s_CtxDma *pGrObject)
{
DWORD flags;
DWORD flags3D;

int size;

int size;
DWORD Inst;

flags=Class&0x000000FF;
flags3D=0;

if ( (Class!=GR_CLASS_30)&&
(Class!=GR_CLASS_39)&&
(Class!=GR_CLASS_62)&&
(Class!=GR_CLASS_97)&&
(Class!=GR_CLASS_9F) )
switch (Class)
{
case GR_CLASS_97:
size=0x330; //816 bytes
flags3D=0x00000A00;
break;
case GR_CLASS_39:
size=16; //16 bytes
flags|=0x01000000;
break;
case GR_CLASS_12:
case GR_CLASS_19:
case GR_CLASS_30:
case GR_CLASS_62:
case GR_CLASS_72:
case GR_CLASS_9F:
size=16; //16 bytes
break;
default:
//"CreateGrObject invalid class number"
size=Class;
}
else
{
size=16; //16 bytes
if (Class==GR_CLASS_97)
{
size=0x330; //816 bytes
flags3D=1;
}
break;
}

Inst=pb_FreeInst; pb_FreeInst+=(size>>4);
Inst=pb_FreeInst;
pb_FreeInst+=(size>>4);

if (flags3D)
{
pb_3DGrCtxInst[pb_FifoChannelID]=Inst;
pb_3D_init();
}


flags=Class&0x000000FF;
flags3D=0x00000000;

if (Class==GR_CLASS_39) flags|=0x01000000;

if (Class==GR_CLASS_97) flags3D=0x00000A00;

VIDEOREG(NV_PRAMIN+(Inst<<4)+0x00)=flags;
VIDEOREG(NV_PRAMIN+(Inst<<4)+0x04)=flags3D;
VIDEOREG(NV_PRAMIN+(Inst<<4)+0x08)=0;
VIDEOREG(NV_PRAMIN+(Inst<<4)+0x0C)=0;


memset(pGrObject,0,sizeof(struct s_CtxDma));

pGrObject->ChannelID=ChannelID;
pGrObject->Class=Class;
pGrObject->isGr=1;
pGrObject->Inst=Inst;
pb_create_gr_instance(ChannelID, Class, Inst, flags, flags3D, pGrObject);
}


Expand Down Expand Up @@ -2181,7 +2174,8 @@ void pb_kill(void)
}


void pb_set_color_format(unsigned int fmt, bool swizzled) {
void pb_set_color_format(unsigned int fmt, bool swizzled)
{
pb_ColorFmt = fmt;
assert(swizzled == false);
}
Expand Down
19 changes: 16 additions & 3 deletions lib/pbkit/pbkit_dma.h
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Original file line number Diff line number Diff line change
Expand Up @@ -52,13 +52,26 @@ struct s_CtxDma
};

// Points an existing DMA context object at a new address.
void pb_set_dma_address (const struct s_CtxDma *context, const void *address, uint32_t limit);
void pb_set_dma_address(const struct s_CtxDma *context, const void *address, uint32_t limit);

// Binds a subchannel to the given context.
void pb_bind_subchannel (uint32_t subchannel, const struct s_CtxDma *context);
void pb_bind_subchannel(uint32_t subchannel, const struct s_CtxDma *context);

// Returns an AGP version of the given nv2a tiled memory address.
void *pb_agp_access (void *fb_memory_pointer);
void *pb_agp_access(void *fb_memory_pointer);

// Creates a DMA context for the given channel, class, and address space.
void pb_create_dma_ctx(DWORD ChannelID,
DWORD Class,
DWORD Base,
DWORD Limit,
struct s_CtxDma *pDmaObject);

// Binds the given DMA context.
void pb_bind_channel(struct s_CtxDma *pCtxDmaObject);

// Creates the context object for the given DMA object.
void pb_create_gr_ctx(int ChannelID, int Class, struct s_CtxDma *pCtxDmaObject);

#ifdef __cplusplus
}
Expand Down
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