diff options
Diffstat (limited to 'plugins/gpu_neon')
| -rw-r--r-- | plugins/gpu_neon/Makefile | 15 | ||||
| -rw-r--r-- | plugins/gpu_neon/gpu.c | 242 |
2 files changed, 257 insertions, 0 deletions
diff --git a/plugins/gpu_neon/Makefile b/plugins/gpu_neon/Makefile new file mode 100644 index 0000000..aab989f --- /dev/null +++ b/plugins/gpu_neon/Makefile @@ -0,0 +1,15 @@ +CC = $(CROSS_COMPILE)gcc +CFLAGS += -ggdb -Wall -fPIC +CFLAGS += -mcpu=cortex-a8 -mtune=cortex-a8 -mfpu=neon -mfloat-abi=softfp + +TARGET = gpu_neon.so +LDFLAGS += -shared -Wl,-soname,$(TARGET) +SRC += gpu.c ../../frontend/arm_utils.s + +all: $(TARGET) + +$(TARGET): $(SRC) + $(CC) -o $@ $^ $(CFLAGS) $(LDFLAGS) + +clean: + $(RM) $(TARGET) diff --git a/plugins/gpu_neon/gpu.c b/plugins/gpu_neon/gpu.c new file mode 100644 index 0000000..f905f0a --- /dev/null +++ b/plugins/gpu_neon/gpu.c @@ -0,0 +1,242 @@ +/* + * (C) GraÅžvydas "notaz" Ignotas, 2011 + * + * This work is licensed under the terms of any of these licenses + * (at your option): + * - GNU GPL, version 2 or later. + * - GNU LGPL, version 2.1 or later. + * See the COPYING file in the top-level directory. + */ + +#include <stdint.h> +#include <string.h> + +#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) + +static struct { + uint16_t vram[1024 * 512]; + uint16_t guard[1024 * 512]; // overdraw guard + uint32_t regs[16]; + union { + uint32_t reg; + struct { + uint32_t tx:4; // 0 texture page + uint32_t ty:1; + uint32_t abr:2; + uint32_t tp:2; // 7 t.p. mode (4,8,15bpp) + uint32_t dtd:1; // 9 dither + uint32_t dfe:1; + uint32_t md:1; // 11 set mask bit when drawing + uint32_t me:1; // 12 no draw on mask + uint32_t unkn:3; + uint32_t width1:1;// 16 + uint32_t width0:2; + uint32_t height:1; + uint32_t video:1; // 20 NTSC,PAL + uint32_t rgb24:1; + uint32_t inter:1; // 22 interlace on + uint32_t den:1; // 23 display not enabled + uint32_t unkn2:2; + uint32_t busy:1; // 26 !busy drawing + uint32_t img:1; // 27 ready to DMA + uint32_t com:1; // 28 ready for commands + uint32_t dma:2; // 29 off, ?, to vram, from vram + uint32_t lcf:1; // 21 odd frame/blanking? + }; + } status; + struct { + int x, y, w, h; + int y1, y2; + } screen; + uint32_t blanking; +} gpu; + +long GPUinit(void) +{ + return 0; +} + +long GPUshutdown(void) +{ + return 0; +} + +uint32_t GPUreadStatus(void) +{ + return gpu.status.reg | (gpu.blanking << 31); +} + +void GPUwriteStatus(uint32_t data) +{ + static const short hres[8] = { 256, 368, 320, 384, 512, 512, 640, 640 }; + static const short vres[4] = { 240, 480, 256, 480 }; + uint32_t cmd = data >> 24; + + switch (data >> 24) { + case 0x00: + break; + case 0x03: + gpu.status.den = data & 1; + break; + case 0x04: + gpu.status.dma = data & 3; + break; + case 0x05: + gpu.screen.x = data & 0x3ff; + gpu.screen.y = (data >> 10) & 0x3ff; + break; + case 0x07: + gpu.screen.y1 = data & 0x3ff; + gpu.screen.y2 = (data >> 10) & 0x3ff; + break; + case 0x08: + gpu.status.reg = (gpu.status.reg & ~0x7f0000) | ((data & 0x3F) << 17) | ((data & 0x40) << 10); + gpu.screen.w = hres[(gpu.status.reg >> 16) & 7]; + gpu.screen.h = vres[(gpu.status.reg >> 19) & 3]; + break; + } + + if (cmd < ARRAY_SIZE(gpu.regs)) + gpu.regs[cmd] = data; +} + +void GPUreadDataMem(uint32_t *mem, int count) +{ +} + +uint32_t GPUreadData(void) +{ + return 0; +} + +void GPUwriteDataMem(uint32_t *mem, int count) +{ +} + +void GPUwriteData(uint32_t gdata) +{ +} + +long GPUdmaChain(uint32_t *base, uint32_t addr) +{ + return 0; +} + +typedef struct GPUFREEZETAG +{ + uint32_t ulFreezeVersion; // should be always 1 for now (set by main emu) + uint32_t ulStatus; // current gpu status + uint32_t ulControl[256]; // latest control register values + unsigned char psxVRam[1024*1024*2]; // current VRam image (full 2 MB for ZN) +} GPUFreeze_t; + +long GPUfreeze(uint32_t type, GPUFreeze_t *freeze) +{ + switch (type) { + case 1: // save + memcpy(freeze->psxVRam, gpu.vram, sizeof(gpu.vram)); + memcpy(freeze->ulControl, gpu.regs, sizeof(gpu.regs)); + freeze->ulStatus = gpu.status.reg; + freeze->ulControl[255] = gpu.blanking; // abuse free space + break; + case 0: // load + memcpy(gpu.vram, freeze->psxVRam, sizeof(gpu.vram)); + memcpy(gpu.regs, freeze->ulControl, sizeof(gpu.regs)); + gpu.status.reg = freeze->ulStatus; + gpu.blanking = freeze->ulControl[255]; + GPUwriteStatus((5 << 24) | gpu.regs[5]); + GPUwriteStatus((7 << 24) | gpu.regs[7]); + GPUwriteStatus((8 << 24) | gpu.regs[8]); + break; + } + + return 1; +} + +void GPUvBlank(int val) +{ + gpu.blanking = !!val; +} + +// rearmed specific + +#include "../../frontend/plugin_lib.h" +#include "../../frontend/arm_utils.h" + +static const struct rearmed_cbs *cbs; +static void *screen_buf; + +static void blit(void) +{ + static uint32_t old_status, old_h; + int x = gpu.screen.x & ~3; // alignment needed by blitter + int y = gpu.screen.y; + int w = gpu.screen.w; + int h; + uint16_t *srcs; + uint8_t *dest; + + srcs = &gpu.vram[y * 1024 + x]; + + h = gpu.screen.y2 - gpu.screen.y1; + + if (h <= 0) + return; + + if ((gpu.status.reg ^ old_status) & ((7<<16)|(1<<21)) || h != old_h) // width|rgb24 change? + { + old_status = gpu.status.reg; + old_h = h; + screen_buf = cbs->pl_fbdev_set_mode(w, h, gpu.status.rgb24 ? 24 : 16); + } + dest = screen_buf; + + if (gpu.status.rgb24) + { +#ifndef MAEMO + for (; h-- > 0; dest += w * 3, srcs += 1024) + { + bgr888_to_rgb888(dest, srcs, w * 3); + } +#else + for (; h-- > 0; dest += w * 2, srcs += 1024) + { + bgr888_to_rgb565(dest, srcs, w * 3); + } +#endif + } + else + { + for (; h-- > 0; dest += w * 2, srcs += 1024) + { + bgr555_to_rgb565(dest, srcs, w * 2); + } + } + + screen_buf = cbs->pl_fbdev_flip(); +} + +void GPUupdateLace(void) +{ + blit(); +} + +long GPUopen(void) +{ + cbs->pl_fbdev_open(); + screen_buf = cbs->pl_fbdev_flip(); + return 0; +} + +long GPUclose(void) +{ + cbs->pl_fbdev_close(); + return 0; +} + +void GPUrearmedCallbacks(const struct rearmed_cbs *cbs_) +{ + cbs = cbs_; +} + +// vim:shiftwidth=2:expandtab |