diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/cell/iommu.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c index a6e6bc1b020f..950d4327b41e 100644 --- a/arch/powerpc/platforms/cell/iommu.c +++ b/arch/powerpc/platforms/cell/iommu.c @@ -307,14 +307,19 @@ static int cell_iommu_find_ioc(int nid, unsigned long *base) } static void cell_iommu_setup_page_tables(struct cbe_iommu *iommu, - unsigned long base, unsigned long size) + unsigned long dbase, unsigned long dsize, + unsigned long fbase, unsigned long fsize) { struct page *page; int i; unsigned long reg, segments, pages_per_segment, ptab_size, stab_size, - n_pte_pages; + n_pte_pages, base; - segments = size >> IO_SEGMENT_SHIFT; + base = dbase; + if (fsize != 0) + base = min(fbase, dbase); + + segments = max(dbase + dsize, fbase + fsize) >> IO_SEGMENT_SHIFT; pages_per_segment = 1ull << IO_PAGENO_BITS; pr_debug("%s: iommu[%d]: segments: %lu, pages per segment: %lu\n", @@ -366,7 +371,7 @@ static void cell_iommu_setup_page_tables(struct cbe_iommu *iommu, } pr_debug("Setting up IOMMU stab:\n"); - for (i = 0; i * (1ul << IO_SEGMENT_SHIFT) < size; i++) { + for (i = base >> IO_SEGMENT_SHIFT; i < segments; i++) { iommu->stab[i] = reg | (__pa(iommu->ptab) + n_pte_pages * IOMMU_PAGE_SIZE * i); pr_debug("\t[%d] 0x%016lx\n", i, iommu->stab[i]); @@ -417,7 +422,7 @@ static void cell_iommu_enable_hardware(struct cbe_iommu *iommu) static void cell_iommu_setup_hardware(struct cbe_iommu *iommu, unsigned long base, unsigned long size) { - cell_iommu_setup_page_tables(iommu, base, size); + cell_iommu_setup_page_tables(iommu, base, size, 0, 0); cell_iommu_enable_hardware(iommu); } |