diff options
Diffstat (limited to 'arch/sparc/include/asm/leon.h')
| -rw-r--r-- | arch/sparc/include/asm/leon.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/leon.h b/arch/sparc/include/asm/leon.h index 8c01f0f6b1ed..c1e05e4ab9e3 100644 --- a/arch/sparc/include/asm/leon.h +++ b/arch/sparc/include/asm/leon.h @@ -254,4 +254,13 @@ extern int leon_ipi_irq; #define _pfn_valid(pfn) ((pfn < last_valid_pfn) && (pfn >= PFN(phys_base))) #define _SRMMU_PTE_PMASK_LEON 0xffffffff +/* + * On LEON PCI Memory space is mapped 1:1 with physical address space. + * + * I/O space is located at low 64Kbytes in PCI I/O space. The I/O addresses + * are converted into CPU addresses to virtual addresses that are mapped with + * MMU to the PCI Host PCI I/O space window which are translated to the low + * 64Kbytes by the Host controller. + */ + #endif |