114 lines
4.1 KiB
C
114 lines
4.1 KiB
C
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/**************************************************************************
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Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
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Copyright © 2002 David Dawes
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All Rights Reserved.
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sub license, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice (including the
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next paragraph) shall be included in all copies or substantial portions
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of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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IN NO EVENT SHALL PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
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ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************/
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#ifndef _INTEL_RING_H
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#define _INTEL_RING_H
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#define OUT_RING(n) do { \
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if (I810_DEBUG & DEBUG_VERBOSE_RING) \
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ErrorF("OUT_RING 0x%08x: 0x%08x, (mask %x)\n", \
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pI830->ring_next, (unsigned int)(n), \
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pI830->LpRing->tail_mask); \
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*(volatile uint32_t *)(pI830->LpRing->virtual_start + \
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pI830->ring_next) = n; \
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pI830->ring_used += 4; \
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pI830->ring_next += 4; \
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pI830->ring_next &= pI830->LpRing->tail_mask; \
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} while (0)
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union intfloat {
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float f;
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unsigned int ui;
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};
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#define OUT_RING_F(x) do { \
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union intfloat tmp; \
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tmp.f = (float)(x); \
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OUT_RING(tmp.ui); \
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} while(0)
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#define ADVANCE_LP_RING() do { \
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if (pI830->ring_emitting == 0) \
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FatalError("%s: ADVANCE_LP_RING called with no matching " \
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"BEGIN_LP_RING\n", __FUNCTION__); \
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if (pI830->ring_used > pI830->ring_emitting) \
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FatalError("%s: ADVANCE_LP_RING: exceeded allocation %d/%d\n ", \
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__FUNCTION__, pI830->ring_used, \
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pI830->ring_emitting); \
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if (pI830->ring_used < pI830->ring_emitting) \
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FatalError("%s: ADVANCE_LP_RING: under-used allocation %d/%d\n ", \
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__FUNCTION__, pI830->ring_used, \
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pI830->ring_emitting); \
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pI830->LpRing->tail = pI830->ring_next; \
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pI830->LpRing->space -= pI830->ring_used; \
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if (pI830->ring_next & 0x07) \
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FatalError("%s: ADVANCE_LP_RING: " \
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"ring_next (0x%x) isn't on a QWord boundary\n", \
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__FUNCTION__, pI830->ring_next); \
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OUTREG(LP_RING + RING_TAIL, pI830->ring_next); \
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pI830->ring_emitting = 0; \
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} while (0)
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/*
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* XXX Note: the head/tail masks are different for 810 and i830.
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* If the i810 always sets the higher bits to 0, then this shouldn't be
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* a problem. Check this!
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*/
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#define DO_RING_IDLE() do { \
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int _head; \
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int _tail; \
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do { \
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_head = INREG(LP_RING + RING_HEAD) & I830_HEAD_MASK; \
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_tail = INREG(LP_RING + RING_TAIL) & I830_TAIL_MASK; \
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DELAY(10); \
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} while (_head != _tail); \
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} while (0)
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#define BEGIN_LP_RING(n) \
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do { \
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if (pI830->ring_emitting != 0) \
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FatalError("%s: BEGIN_LP_RING called without closing " \
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"ADVANCE_LP_RING\n", __FUNCTION__); \
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if ((n) > 2 && (I810_DEBUG&DEBUG_ALWAYS_SYNC)) \
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DO_RING_IDLE(); \
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pI830->ring_emitting = (n) * 4; \
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if ((n) & 1) \
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pI830->ring_emitting += 4; \
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if (pI830->LpRing->space < pI830->ring_emitting) \
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WaitRingFunc(pScrn, pI830->ring_emitting, 0); \
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pI830->ring_next = pI830->LpRing->tail; \
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if (I810_DEBUG & DEBUG_VERBOSE_RING) \
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ErrorF( "BEGIN_LP_RING %d in %s\n", n, FUNCTION_NAME); \
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pI830->ring_used = 0; \
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if ((n) & 1) \
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OUT_RING(MI_NOOP); \
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} while (0)
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#endif /* _INTEL_RING_H */
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