Skip to content

Instantly share code, notes, and snippets.

@ao-kenji

ao-kenji/luna88k-rop-140919-1.diff

Created September 19, 2014 13:22
Show Gist options
  • Save ao-kenji/00134f251bfbeec5d9fa to your computer and use it in GitHub Desktop.
Save ao-kenji/00134f251bfbeec5d9fa to your computer and use it in GitHub Desktop.
Download ZIP
[Merged into original tree] A trial to use LUNA frame buffer's ROP function on OpenBSD/luna88k. It makes 4bpp putchar about 20% faster.
Raw
luna88k-rop-140919-1.diff
Index: sys/arch/luna88k/dev/omrasops.c
===================================================================
RCS file: /cvs/src/sys/arch/luna88k/dev/omrasops.c,v
retrieving revision 1.11
diff -u -r1.11 omrasops.c
--- sys/arch/luna88k/dev/omrasops.c 2 Jan 2014 15:30:34 -0000 1.11
+++ sys/arch/luna88k/dev/omrasops.c 19 Sep 2014 13:22:11 -0000
@@ -175,8 +175,15 @@
width = ri->ri_font->fontwidth + align;
lmask = ALL1BITS >> align;
rmask = ALL1BITS << (-width & ALIGNMASK);
+
+ /* select all planes for later ROP function target */
+ *(volatile u_int32_t *)OMFB_PLANEMASK = 0xff;
+
if (width <= BLITWIDTH) {
lmask &= rmask;
+ /* set lmask as ROP mask value, with THROUGH mode */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[5] = lmask;
+
while (height > 0) {
glyph = 0;
for (i = ri->ri_font->stride; i != 0; i--)
@@ -187,20 +194,22 @@
fgpat = (fg & 0x01) ? glyph : 0;
bgpat = (bg & 0x01) ? glyphbg : 0;
- *P0(p) = (*P0(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P0(p) = (fgpat | bgpat);
fgpat = (fg & 0x02) ? glyph : 0;
bgpat = (bg & 0x02) ? glyphbg : 0;
- *P1(p) = (*P1(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P1(p) = (fgpat | bgpat);
fgpat = (fg & 0x04) ? glyph : 0;
bgpat = (bg & 0x04) ? glyphbg : 0;
- *P2(p) = (*P2(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P2(p) = (fgpat | bgpat);
fgpat = (fg & 0x08) ? glyph : 0;
bgpat = (bg & 0x08) ? glyphbg : 0;
- *P3(p) = (*P3(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P3(p) = (fgpat | bgpat);
p += scanspan;
height--;
}
+ /* reset mask value */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[5] = ALL1BITS;
} else {
u_int8_t *q = p;
u_int32_t lhalf, rhalf;
@@ -213,42 +222,50 @@
glyph <<= (4 - ri->ri_font->stride) * NBBY;
lhalf = (glyph >> align);
lhalfbg = lhalf ^ ALL1BITS;
+ /* set lmask as ROP mask value, with THROUGH mode */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[5] = lmask;
fgpat = (fg & 0x01) ? lhalf : 0;
bgpat = (bg & 0x01) ? lhalfbg : 0;
- *P0(p) = (*P0(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P0(p) = (fgpat | bgpat);
fgpat = (fg & 0x02) ? lhalf : 0;
bgpat = (bg & 0x02) ? lhalfbg : 0;
- *P1(p) = (*P1(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P1(p) = (fgpat | bgpat);
fgpat = (fg & 0x04) ? lhalf : 0;
bgpat = (bg & 0x04) ? lhalfbg : 0;
- *P2(p) = (*P2(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P2(p) = (fgpat | bgpat);
fgpat = (fg & 0x08) ? lhalf : 0;
bgpat = (bg & 0x08) ? lhalfbg : 0;
- *P3(p) = (*P3(p) & ~lmask) | ((fgpat | bgpat) & lmask);
+ *P3(p) = (fgpat | bgpat);
p += BYTESDONE;
rhalf = (glyph << (BLITWIDTH - align));
rhalfbg = rhalf ^ ALL1BITS;
+ /* set rmask as ROP mask value, with THROUGH mode */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[5] = rmask;
fgpat = (fg & 0x01) ? rhalf : 0;
bgpat = (bg & 0x01) ? rhalfbg : 0;
- *P0(p) = ((fgpat | bgpat) & rmask) | (*P0(p) & ~rmask);
+ *P0(p) = (fgpat | bgpat);
fgpat = (fg & 0x02) ? rhalf : 0;
bgpat = (bg & 0x02) ? rhalfbg : 0;
- *P1(p) = ((fgpat | bgpat) & rmask) | (*P1(p) & ~rmask);
+ *P1(p) = (fgpat | bgpat);
fgpat = (fg & 0x04) ? rhalf : 0;
bgpat = (bg & 0x04) ? rhalfbg : 0;
- *P2(p) = ((fgpat | bgpat) & rmask) | (*P2(p) & ~rmask);
+ *P2(p) = (fgpat | bgpat);
fgpat = (fg & 0x08) ? rhalf : 0;
bgpat = (bg & 0x08) ? rhalfbg : 0;
- *P3(p) = ((fgpat | bgpat) & rmask) | (*P3(p) & ~rmask);
+ *P3(p) = (fgpat | bgpat);
p = (q += scanspan);
height--;
}
+ /* reset mask value */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[5] = ALL1BITS;
}
+ /* select plane #0 only; XXX need this ? */
+ *(volatile u_int32_t *)OMFB_PLANEMASK = 0x01;
return 0;
}
@@ -408,7 +425,7 @@
struct rasops_info *ri = cookie;
u_int8_t *p;
int scanspan, startx, height, width, align, y;
- u_int32_t lmask, rmask, image;
+ u_int32_t lmask, rmask;
if (!on) {
/* make sure it's on */
@@ -433,48 +450,45 @@
width = ri->ri_font->fontwidth + align;
lmask = ALL1BITS >> align;
rmask = ALL1BITS << (-width & ALIGNMASK);
+
+ /* select all planes for later ROP function target */
+ *(volatile u_int32_t *)OMFB_PLANEMASK = 0xff;
+
if (width <= BLITWIDTH) {
lmask &= rmask;
+ /* set lmask as ROP mask value, with INV2 mode */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[12] = lmask;
+
while (height > 0) {
- image = *P0(p);
- *P0(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
- image = *P1(p);
- *P1(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
- image = *P2(p);
- *P2(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
- image = *P3(p);
- *P3(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
+ *W(p) = ALL1BITS;
p += scanspan;
height--;
}
+ /* reset mask value */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[5] = ALL1BITS;
} else {
u_int8_t *q = p;
while (height > 0) {
- image = *P0(p);
- *P0(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
- image = *P1(p);
- *P1(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
- image = *P2(p);
- *P2(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
- image = *P3(p);
- *P3(p) = (image & ~lmask) | ((image ^ ALL1BITS) & lmask);
+ /* set lmask as ROP mask value, with INV2 mode */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[12] = lmask;
+ *W(p) = ALL1BITS;
p += BYTESDONE;
- image = *P0(p);
- *P0(p) = ((image ^ ALL1BITS) & rmask) | (image & ~rmask);
- image = *P1(p);
- *P1(p) = ((image ^ ALL1BITS) & rmask) | (image & ~rmask);
- image = *P2(p);
- *P2(p) = ((image ^ ALL1BITS) & rmask) | (image & ~rmask);
- image = *P3(p);
- *P3(p) = ((image ^ ALL1BITS) & rmask) | (image & ~rmask);
+ /* set rmask as ROP mask value, with INV2 mode */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[12] = rmask;
+ *W(p) = ALL1BITS;
p = (q += scanspan);
height--;
}
+ /* reset mask value */
+ ((volatile u_int32_t *)OMFB_ROPFUNC)[5] = ALL1BITS;
}
+ /* select plane #0 only; XXX need this ? */
+ *(volatile u_int32_t *)OMFB_PLANEMASK = 0x01;
+
ri->ri_flg ^= RI_CURSOR;
return 0;
Index: sys/arch/luna88k/dev/omrasops.h
===================================================================
RCS file: /cvs/src/sys/arch/luna88k/dev/omrasops.h,v
retrieving revision 1.2
diff -u -r1.2 omrasops.h
--- sys/arch/luna88k/dev/omrasops.h 2 Jan 2014 15:30:34 -0000 1.2
+++ sys/arch/luna88k/dev/omrasops.h 19 Sep 2014 13:22:11 -0000
@@ -18,14 +18,17 @@
* Base addresses of LUNA's frame buffer
* XXX: We consider only 1bpp and 4bpp for now
*/
+
+#define OMFB_PLANEMASK 0xB1040000 /* BMSEL register */
#define OMFB_FB_WADDR 0xB1080008 /* common plane */
#define OMFB_FB_RADDR 0xB10C0008 /* plane #0 */
+#define OMFB_ROPFUNC 0xB12C0000 /* common ROP function */
/*
* Helper macros
*/
-#define W(addr) ((u_int32_t *)(addr))
-#define R(addr) ((u_int32_t *)((u_int8_t *)(addr) + 0x40000))
+#define W(addr) ((u_int32_t *)(addr))
+#define R(addr) ((u_int32_t *)((u_int8_t *)(addr) + 0x40000))
#define P0(addr) ((u_int32_t *)((u_int8_t *)(addr) + 0x40000))
#define P1(addr) ((u_int32_t *)((u_int8_t *)(addr) + 0x80000))
#define P2(addr) ((u_int32_t *)((u_int8_t *)(addr) + 0xC0000))
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment