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authorpbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>2006-08-12 01:04:27 +0000
committerpbrook <pbrook@c046a42c-6fe2-441c-8c8c-71466251a162>2006-08-12 01:04:27 +0000
commit4d611c9a2f4c5d9080d8b6a6f0d7431233cd56f9 (patch)
tree6217063ef291bd680f1c81a82bdaef7345356c16 /pc-bios
parent4ca9c76f3620dc20e56d9b7027a6f1115ea48eea (diff)
SCSI and USB async IO support.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2107 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'pc-bios')
-rw-r--r--pc-bios/openbios-esp.diff30
-rw-r--r--pc-bios/openbios-sparc32bin506966 -> 246036 bytes
2 files changed, 30 insertions, 0 deletions
diff --git a/pc-bios/openbios-esp.diff b/pc-bios/openbios-esp.diff
new file mode 100644
index 0000000000..5d4f836f12
--- /dev/null
+++ b/pc-bios/openbios-esp.diff
@@ -0,0 +1,30 @@
+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];
+
diff --git a/pc-bios/openbios-sparc32 b/pc-bios/openbios-sparc32
index 7a729aa81b..04b60776df 100644
--- a/pc-bios/openbios-sparc32
+++ b/pc-bios/openbios-sparc32
Binary files differ