} else { \
paddr = ((uint32_t)pseg << 4) + poffs; \
} \
- (ptr) = (void*)paddr; \
+ (ptr) = (void*)phys_to_virt(paddr); \
} while(0)
/* hijack the "VESA" sig field, to pre-cache number of modes */
#define NMODES(inf) *(uint16_t*)((inf)->sig)
#define NACCMODES(inf) *(uint16_t*)((inf)->sig + 2)
+static int cur_pitch;
+/* TODO update cur_pitch on mode-change and on setscanlen */
+
+
int vbe_info(struct vbe_info *info)
{
- int i, num;
void *lowbuf;
uint16_t seg, sel;
uint16_t *modeptr;
+ uint32_t offs;
struct dpmi_regs regs = {0};
assert(sizeof *info == 512);
if(!(seg = dpmi_alloc(sizeof *info / 16, &sel))) {
return -1;
}
- lowbuf = (void*)((uint32_t)seg << 4);
+ lowbuf = (void*)phys_to_virt((uint32_t)seg << 4);
memcpy(lowbuf, "VBE2", 4);
FIXPTR(info->product);
FIXPTR(info->revstr);
FIXPTR(info->modes);
- FIXPTR(info->accel_modes);
+ /* implementations without the accel capability, will use the space taken
+ * by the accel_modes pointer for other data (probably video modes). We
+ * need to check for the capability before "fixing" this pointer, otherwise
+ * we'll shuffle random data.
+ */
+ if(info->caps & VBE_ACCEL) {
+ FIXPTR(info->accel_modes);
+ }
+
+ /* info->modes should be pointing somewhere at the end of the original
+ * low memory buffer. make it point at the same offset in the info
+ * buffer where we copied everything instead.
+ */
+ offs = (char*)info->modes - (char*)lowbuf;
+ if(offs < sizeof *info) { /* this should always be true */
+ info->modes = (uint16_t*)((char*)info + offs);
+ }
modeptr = info->modes;
while(*modeptr != 0xffff) {
int vbe_mode_info(int mode, struct vbe_mode_info *minf)
{
- int i, num;
void *lowbuf;
uint16_t seg, sel;
struct dpmi_regs regs = {0};
if(!(seg = dpmi_alloc(sizeof *minf / 16, &sel))) {
return -1;
}
- lowbuf = (void*)((uint32_t)seg << 4);
+ lowbuf = (void*)phys_to_virt((uint32_t)seg << 4);
regs.eax = 0x4f01;
regs.ecx = mode;
if(minf->attr & VBE_ATTR_LFB) {
fprintf(fp, " lfb@%lx", (unsigned long)minf->fb_addr);
+ } else {
+ fprintf(fp, " %xkb/bank", (unsigned int)minf->bank_size);
}
fprintf(fp, " [");
if(minf->attr & VBE_ATTR_NOTVGA) fprintf(fp, " non-vga");
if(minf->attr & VBE_ATTR_BANKED) fprintf(fp, " banked");
if(minf->attr & VBE_ATTR_LFB) fprintf(fp, " lfb");
- if(minf->attr & VBE_ATTR_2XSCAN) fprintf(fp, " dblscan");
+ if(minf->attr & VBE_ATTR_DBLSCAN) fprintf(fp, " dblscan");
if(minf->attr & VBE_ATTR_ILACE) fprintf(fp, " ilace");
if(minf->attr & VBE_ATTR_TRIPLEBUF) fprintf(fp, " trplbuf");
if(minf->attr & VBE_ATTR_STEREO) fprintf(fp, " stereo");
fprintf(fp, " ]\n");
fflush(fp);
}
+
+int vbe_setmode(uint16_t mode)
+{
+ struct dpmi_regs regs = {0};
+
+ regs.eax = 0x4f02;
+ regs.ebx = mode;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+
+ cur_pitch = vbe_getpitch();
+ return 0;
+}
+
+int vbe_setmode_crtc(uint16_t mode, struct vbe_crtc_info *crtc)
+{
+ void *lowbuf;
+ uint16_t seg, sel;
+ struct dpmi_regs regs = {0};
+
+ assert(sizeof *crtc == 59);
+
+ if(!(seg = dpmi_alloc((sizeof *crtc + 15) / 16, &sel))) {
+ return -1;
+ }
+ lowbuf = (void*)phys_to_virt((uint32_t)seg << 4);
+
+ memcpy(lowbuf, crtc, sizeof *crtc);
+
+ regs.eax = 0x4f02;
+ regs.ebx = mode;
+ regs.es = seg;
+ dpmi_int(0x10, ®s);
+
+ dpmi_free(sel);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+
+ cur_pitch = vbe_getpitch();
+ return 0;
+}
+
+int vbe_getmode(void)
+{
+ struct dpmi_regs regs = {0};
+
+ regs.eax = 0x4f03;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return regs.ebx & 0xffff;
+}
+
+int vbe_state_size(unsigned int flags)
+{
+ struct dpmi_regs regs = {0};
+
+ regs.eax = 0x4f04;
+ regs.edx = 0;
+ regs.ecx = flags;
+ dpmi_int(0x10, ®s);
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return (regs.ebx & 0xffff) * 64;
+}
+
+int vbe_save(void *stbuf, int sz, unsigned int flags)
+{
+ void *lowbuf;
+ uint16_t seg, sel;
+ struct dpmi_regs regs = {0};
+
+ if(!(seg = dpmi_alloc((sz + 15) / 16, &sel))) {
+ return -1;
+ }
+ lowbuf = (void*)phys_to_virt((uint32_t)seg << 4);
+
+ regs.eax = 0x4f04;
+ regs.edx = 1; /* save */
+ regs.ecx = flags;
+ regs.es = seg;
+ dpmi_int(0x10, ®s);
+ if((regs.eax & 0xffff) != 0x4f) {
+ dpmi_free(sel);
+ return -1;
+ }
+
+ memcpy(stbuf, lowbuf, sz);
+ dpmi_free(sel);
+ return 0;
+}
+
+int vbe_restore(void *stbuf, int sz, unsigned int flags)
+{
+ void *lowbuf;
+ uint16_t seg, sel;
+ struct dpmi_regs regs = {0};
+
+ if(!(seg = dpmi_alloc((sz + 15) / 16, &sel))) {
+ return -1;
+ }
+ lowbuf = (void*)phys_to_virt((uint32_t)seg << 4);
+
+ memcpy(lowbuf, stbuf, sz);
+
+ regs.eax = 0x4f04;
+ regs.edx = 2; /* restore */
+ regs.ecx = flags;
+ regs.es = seg;
+ dpmi_int(0x10, ®s);
+ dpmi_free(sel);
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return 0;
+}
+
+int vbe_setwin(int wid, int pos)
+{
+ struct dpmi_regs regs;
+
+ if(wid & ~1) return -1;
+
+ regs.eax = 0x4f05;
+ regs.ebx = wid;
+ regs.edx = pos;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return 0;
+}
+
+int vbe_getwin(int wid)
+{
+ struct dpmi_regs regs;
+
+ if(wid & ~1) return -1;
+
+ regs.eax = 0x4f05;
+ regs.ebx = wid;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+
+ return regs.edx & 0xffff;
+}
+
+int vbe_setscanlen(int len_pix)
+{
+ struct dpmi_regs regs;
+
+ regs.eax = 0x4f06;
+ regs.ebx = 0; /* set scanline length in pixels */
+ regs.ecx = len_pix;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+
+ cur_pitch = vbe_getpitch();
+ return regs.ecx;
+}
+
+int vbe_getscanlen(void)
+{
+ struct dpmi_regs regs;
+
+ regs.eax = 0x4f06;
+ regs.ebx = 1; /* get scanline length */
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return regs.ecx;
+}
+
+int vbe_getpitch(void)
+{
+ struct dpmi_regs regs;
+
+ regs.eax = 0x4f06;
+ regs.ebx = 1; /* get scanline length */
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return regs.ebx;
+}
+
+int vbe_scanline_info(struct vbe_scanline_info *sinf)
+{
+ struct dpmi_regs regs;
+
+ regs.eax = 0x4f06;
+ regs.ebx = 1; /* get scanline length */
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+
+ sinf->size = regs.ebx & 0xffff;
+ sinf->num_pixels = regs.ecx & 0xffff;
+ sinf->max_scanlines = regs.edx & 0xffff;
+ return 0;
+}
+
+enum {
+ SDISP_SET = 0x00,
+ SDISP_GET = 0x01,
+ SDISP_ALTSET = 0x02,
+ SDISP_SET_STEREO = 0x03,
+ SDISP_GETSCHED = 0x04,
+ SDISP_STEREO_ON = 0x05,
+ SDISP_STEREO_OFF = 0x06,
+ SDISP_SET_VBLANK = 0x80,
+ SDISP_ALTSET_VBLANK = 0x82,
+ SDISP_SET_STEREO_VBLANK = 0x83
+};
+
+int vbe_setdisp(int x, int y, int when)
+{
+ struct dpmi_regs regs;
+
+ regs.eax = 0x4f07;
+ regs.ebx = (when == VBE_SWAP_VBLANK) ? SDISP_SET_VBLANK : SDISP_SET;
+ regs.ecx = x;
+ regs.edx = y;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return 0;
+}
+
+int vbe_swap(uint32_t voffs, int when)
+{
+ struct dpmi_regs regs;
+ int op;
+
+ switch(when) {
+ case VBE_SWAP_ASYNC:
+ op = SDISP_ALTSET;
+ break;
+
+ case VBE_SWAP_NOW:
+ /* XXX is this the only way? */
+ return vbe_setdisp(voffs % cur_pitch, voffs / cur_pitch, when);
+
+ case VBE_SWAP_VBLANK:
+ default:
+ op = SDISP_ALTSET_VBLANK;
+ break;
+ }
+
+
+ regs.eax = 0x4f07;
+ regs.ebx = op;
+ regs.ecx = voffs;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return -1;
+ }
+ return 0;
+}
+
+int vbe_swap_pending(void)
+{
+ struct dpmi_regs regs;
+
+ regs.eax = 0x4f07;
+ regs.ebx = SDISP_GETSCHED;
+ dpmi_int(0x10, ®s);
+
+ if((regs.eax & 0xffff) != 0x4f) {
+ return 0;
+ }
+ return regs.ecx;
+}
projects / dosdemo / blobdiff