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Diffstat (limited to 'arch/sparc64/kernel/pci_sun4v_asm.S')
-rw-r--r--arch/sparc64/kernel/pci_sun4v_asm.S95
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/pci_sun4v_asm.S b/arch/sparc64/kernel/pci_sun4v_asm.S
new file mode 100644
index 000000000000..6604fdbf746c
--- /dev/null
+++ b/arch/sparc64/kernel/pci_sun4v_asm.S
@@ -0,0 +1,95 @@
+/* pci_sun4v_asm: Hypervisor calls for PCI support.
+ *
+ * Copyright (C) 2006 David S. Miller <davem@davemloft.net>
+ */
+
+#include <asm/hypervisor.h>
+
+ /* %o0: devhandle
+ * %o1: tsbid
+ * %o2: num ttes
+ * %o3: io_attributes
+ * %o4: io_page_list phys address
+ *
+ * returns %o0: -status if status was non-zero, else
+ * %o0: num pages mapped
+ */
+ .globl pci_sun4v_iommu_map
+pci_sun4v_iommu_map:
+ mov %o5, %g1
+ mov HV_FAST_PCI_IOMMU_MAP, %o5
+ ta HV_FAST_TRAP
+ brnz,pn %o0, 1f
+ sub %g0, %o0, %o0
+ mov %o1, %o0
+1: retl
+ nop
+
+ /* %o0: devhandle
+ * %o1: tsbid
+ * %o2: num ttes
+ *
+ * returns %o0: num ttes demapped
+ */
+ .globl pci_sun4v_iommu_demap
+pci_sun4v_iommu_demap:
+ mov HV_FAST_PCI_IOMMU_DEMAP, %o5
+ ta HV_FAST_TRAP
+ retl
+ mov %o1, %o0
+
+ /* %o0: devhandle
+ * %o1: tsbid
+ * %o2: &io_attributes
+ * %o3: &real_address
+ *
+ * returns %o0: status
+ */
+ .globl pci_sun4v_iommu_getmap
+pci_sun4v_iommu_getmap:
+ mov %o2, %o4
+ mov HV_FAST_PCI_IOMMU_GETMAP, %o5
+ ta HV_FAST_TRAP
+ stx %o1, [%o4]
+ stx %o2, [%o3]
+ retl
+ mov %o0, %o0
+
+ /* %o0: devhandle
+ * %o1: pci_device
+ * %o2: pci_config_offset
+ * %o3: size
+ *
+ * returns %o0: data
+ *
+ * If there is an error, the data will be returned
+ * as all 1's.
+ */
+ .globl pci_sun4v_config_get
+pci_sun4v_config_get:
+ mov HV_FAST_PCI_CONFIG_GET, %o5
+ ta HV_FAST_TRAP
+ brnz,a,pn %o1, 1f
+ mov -1, %o2
+1: retl
+ mov %o2, %o0
+
+ /* %o0: devhandle
+ * %o1: pci_device
+ * %o2: pci_config_offset
+ * %o3: size
+ * %o4: data
+ *
+ * returns %o0: status
+ *
+ * status will be zero if the operation completed
+ * successfully, else -1 if not
+ */
+ .globl pci_sun4v_config_put
+pci_sun4v_config_put:
+ mov HV_FAST_PCI_CONFIG_PUT, %o5
+ ta HV_FAST_TRAP
+ brnz,a,pn %o1, 1f
+ mov -1, %o1
+1: retl
+ mov %o1, %o0