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via: Make sure we flush write-combining using a follow-up read.

main
Thomas Hellstrom 2007-04-17 08:58:23 +02:00
parent e91ceff6c9
commit e805ca959d
1 changed files with 4 additions and 2 deletions
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6
shared-core/via_dma.c
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@ -430,8 +430,10 @@ static int via_hook_segment(drm_via_private_t *dev_priv,
paused = 0;
via_flush_write_combine();
*dev_priv->last_pause_ptr = pause_addr_lo;
(void) *(volatile uint32_t *)(via_get_dma(dev_priv) -1);
*paused_at = pause_addr_lo;
via_flush_write_combine();
(void) *paused_at;
reader = *(dev_priv->hw_addr_ptr);
ptr = ((volatile char *)paused_at - dev_priv->dma_ptr) +
dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
@ -536,7 +538,7 @@ static void via_cmdbuf_start(drm_via_private_t * dev_priv)
&pause_addr_hi, & pause_addr_lo, 1) - 1;
via_flush_write_combine();
while(! *dev_priv->last_pause_ptr);
(void) *(volatile uint32_t *)dev_priv->last_pause_ptr;
VIA_WRITE(VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
VIA_WRITE(VIA_REG_TRANSPACE, command);