diff options
| author | Daniel Hellstrom <daniel@gaisler.com> | 2013-04-24 17:36:44 +0200 |
|---|---|---|
| committer | Daniel Hellstrom <daniel@gaisler.com> | 2015-04-17 01:10:19 +0200 |
| commit | 175b9a64722b0fb0599f0dcaa7758e014183faab (patch) | |
| tree | 0a83adbbdc20eeeb136954e81b942705c1bff201 /c/src/lib/libbsp/sparc/shared | |
| parent | PCI-RASTA: set GRPCI1 target cache-line-size to avoid poor performance (diff) | |
| download | rtems-175b9a64722b0fb0599f0dcaa7758e014183faab.tar.bz2 | |
GRPCI2: work-around for rev0 bug by limiting prefetching
Diffstat (limited to 'c/src/lib/libbsp/sparc/shared')
| -rw-r--r-- | c/src/lib/libbsp/sparc/shared/pci/grpci2.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/sparc/shared/pci/grpci2.c b/c/src/lib/libbsp/sparc/shared/pci/grpci2.c index 55a69ef052..3891c253af 100644 --- a/c/src/lib/libbsp/sparc/shared/pci/grpci2.c +++ b/c/src/lib/libbsp/sparc/shared/pci/grpci2.c @@ -187,11 +187,13 @@ struct grpci2_cap_first { unsigned int ext2ahb_map; unsigned int io_map; unsigned int pcibar_size[6]; + unsigned int ahb_pref; }; #define CAP9_CTRL_OFS 0 #define CAP9_BAR_OFS 0x4 #define CAP9_IOMAP_OFS 0x20 #define CAP9_BARSIZE_OFS 0x24 +#define CAP9_AHBPREF_OFS 0x3C struct grpci2_priv *grpci2priv = NULL; @@ -224,6 +226,7 @@ struct grpci2_pcibar_cfg grpci2_default_bar_mapping[6] = { struct grpci2_priv { struct drvmgr_dev *dev; struct grpci2_regs *regs; + unsigned char ver; char irq; char irq_mode; /* IRQ Mode from CAPSTS REG */ char bt_enabled; @@ -649,6 +652,10 @@ int grpci2_hw_init(struct grpci2_priv *priv) if (capptr == 0) return -1; + /* Limit the prefetch for GRPCI2 version 0. */ + if (priv->ver == 0) + grpci2_cfg_w32(host, capptr+CAP9_AHBPREF_OFS, 0); + /* Enable/Disable Byte twisting */ grpci2_cfg_r32(host, capptr+CAP9_IOMAP_OFS, &io_map); io_map = (io_map & ~0x1) | (priv->bt_enabled ? 1 : 0); @@ -708,6 +715,7 @@ int grpci2_init(struct grpci2_priv *priv) /* Found PCI core, init private structure */ priv->irq = apb->irq; + priv->ver = apb->ver; priv->regs = (struct grpci2_regs *)apb->start; priv->bt_enabled = DEFAULT_BT_ENABLED; priv->irq_mode = (priv->regs->sts_cap & STS_IRQMODE) >> STS_IRQMODE_BIT; |