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Remove OpenBIOS ESP patch. Merged upstream.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2108 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2006-08-13 14:20:43 +00:00
parent 4d611c9a2f
commit 69fba4a51e
1 changed files with 0 additions and 30 deletions
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30
pc-bios/openbios-esp.diff
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@ -1,30 +0,0 @@
The ESP SCSI driver currently doesn't check whether a DMA requests has
completed before checking its status. On older qemu versions this works ok
because DMA happens instantly. On never qemu DMA can take an indeterminate
amount of time ooto complete, just like on real hardware.
The patch below waits for the controller to raise the DMA interrupt after
initiating a DMA request.
Index: drivers/esp.c
===================================================================
--- drivers/esp.c (revision 61)
+++ drivers/esp.c (working copy)
@@ -113,6 +113,8 @@ do_command(esp_private_t *esp, sd_privat
esp->espdma.regs->cond_reg = 0;
// Set ATN, issue command
esp->ll->regs[ESP_CMD] = ESP_CMD_SELA | ESP_CMD_DMA;
+ // Wait for DMA to complete
+ while ((esp->espdma.regs->cond_reg & DMA_HNDL_INTR) == 0) /* no-op */;
// Check status
status = esp->ll->regs[ESP_STATUS];
@@ -129,6 +131,8 @@ do_command(esp_private_t *esp, sd_privat
esp->espdma.regs->cond_reg = DMA_ST_WRITE;
// Transfer
esp->ll->regs[ESP_CMD] = ESP_CMD_TI | ESP_CMD_DMA;
+ // Wait for DMA to complete
+ while ((esp->espdma.regs->cond_reg & DMA_HNDL_INTR) == 0) /* no-op */;
// Check status
status = esp->ll->regs[ESP_STATUS];