summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/io-workarounds.h
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--arch/powerpc/include/asm/io-workarounds.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/io-workarounds.h b/arch/powerpc/include/asm/io-workarounds.h
new file mode 100644
index 000000000..3cce499fb
--- /dev/null
+++ b/arch/powerpc/include/asm/io-workarounds.h
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Support PCI IO workaround
+ *
+ * (C) Copyright 2007-2008 TOSHIBA CORPORATION
+ */
+
+#ifndef _IO_WORKAROUNDS_H
+#define _IO_WORKAROUNDS_H
+
+#ifdef CONFIG_PPC_IO_WORKAROUNDS
+#include <linux/io.h>
+#include <asm/pci-bridge.h>
+
+/* Bus info */
+struct iowa_bus {
+ struct pci_controller *phb;
+ struct ppc_pci_io *ops;
+ void *private;
+};
+
+void iowa_register_bus(struct pci_controller *, struct ppc_pci_io *,
+ int (*)(struct iowa_bus *, void *), void *);
+struct iowa_bus *iowa_mem_find_bus(const PCI_IO_ADDR);
+struct iowa_bus *iowa_pio_find_bus(unsigned long);
+
+extern struct ppc_pci_io spiderpci_ops;
+extern int spiderpci_iowa_init(struct iowa_bus *, void *);
+
+#define SPIDER_PCI_REG_BASE 0xd000
+#define SPIDER_PCI_REG_SIZE 0x1000
+#define SPIDER_PCI_VCI_CNTL_STAT 0x0110
+#define SPIDER_PCI_DUMMY_READ 0x0810
+#define SPIDER_PCI_DUMMY_READ_BASE 0x0814
+
+#endif
+
+#if defined(CONFIG_PPC_IO_WORKAROUNDS) && defined(CONFIG_PPC_INDIRECT_MMIO)
+extern bool io_workaround_inited;
+
+static inline bool iowa_is_active(void)
+{
+ return unlikely(io_workaround_inited);
+}
+#else
+static inline bool iowa_is_active(void)
+{
+ return false;
+}
+#endif
+
+void __iomem *iowa_ioremap(phys_addr_t addr, unsigned long size,
+ pgprot_t prot, void *caller);
+
+#endif /* _IO_WORKAROUNDS_H */