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| author | Jason A. Harmening <jah@FreeBSD.org> | 2015-10-23 12:03:25 +0000 |
|---|---|---|
| committer | Jason A. Harmening <jah@FreeBSD.org> | 2015-10-23 12:03:25 +0000 |
| commit | a50730587b9b45a82a5807354129e37143e5eabe (patch) | |
| tree | c4548edd5edeaf22ba0e2fba0d139a2ee16e021d /sys/arm | |
| parent | 3f8e0710526be16fc955664f572af7da6146235a (diff) | |
| download | src-a50730587b9b45a82a5807354129e37143e5eabe.tar.gz src-a50730587b9b45a82a5807354129e37143e5eabe.zip | |
Remove unclear comment about address truncation in busdma. Add (hopefully much clearer) comment at declaration of PHYS_TO_VM_PAGE().
Noted by: avg
Notes
Notes:
svn path=/head/; revision=289825
Diffstat (limited to 'sys/arm')
| -rw-r--r-- | sys/arm/arm/busdma_machdep-v6.c | 9 | ||||
| -rw-r--r-- | sys/arm/arm/busdma_machdep.c | 9 |
2 files changed, 0 insertions, 18 deletions
diff --git a/sys/arm/arm/busdma_machdep-v6.c b/sys/arm/arm/busdma_machdep-v6.c index a945b6371dc8..66d461204f16 100644 --- a/sys/arm/arm/busdma_machdep-v6.c +++ b/sys/arm/arm/busdma_machdep-v6.c @@ -1089,10 +1089,6 @@ _bus_dmamap_load_phys(bus_dma_tag_t dmat, sl++; sl->vaddr = 0; sl->datacount = sgsize; - /* - * PHYS_TO_VM_PAGE() will truncate - * unaligned addresses. - */ sl->pages = PHYS_TO_VM_PAGE(curaddr); sl->dataoffs = curaddr & PAGE_MASK; } else @@ -1214,10 +1210,6 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat, sl++; sl->vaddr = kvaddr; sl->datacount = sgsize; - /* - * PHYS_TO_VM_PAGE() will truncate - * unaligned addresses. - */ sl->pages = PHYS_TO_VM_PAGE(curaddr); sl->dataoffs = curaddr & PAGE_MASK; } else @@ -1687,7 +1679,6 @@ add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr, bpage->busaddr |= addr & PAGE_MASK; } bpage->datavaddr = vaddr; - /* PHYS_TO_VM_PAGE() will truncate unaligned addresses. */ bpage->datapage = PHYS_TO_VM_PAGE(addr); bpage->dataoffs = addr & PAGE_MASK; bpage->datacount = size; diff --git a/sys/arm/arm/busdma_machdep.c b/sys/arm/arm/busdma_machdep.c index e7ec8b1403d7..00c7f2314f98 100644 --- a/sys/arm/arm/busdma_machdep.c +++ b/sys/arm/arm/busdma_machdep.c @@ -993,10 +993,6 @@ _bus_dmamap_load_phys(bus_dma_tag_t dmat, bus_dmamap_t map, vm_paddr_t buf, sl++; sl->vaddr = 0; sl->datacount = sgsize; - /* - * PHYS_TO_VM_PAGE() will truncate - * unaligned addresses. - */ sl->pages = PHYS_TO_VM_PAGE(curaddr); sl->dataoffs = curaddr & PAGE_MASK; } else @@ -1108,10 +1104,6 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf, sl++; sl->vaddr = kvaddr; sl->datacount = sgsize; - /* - * PHYS_TO_VM_PAGE() will truncate - * unaligned addresses. - */ sl->pages = PHYS_TO_VM_PAGE(curaddr); sl->dataoffs = curaddr & PAGE_MASK; } else @@ -1541,7 +1533,6 @@ add_bounce_page(bus_dma_tag_t dmat, bus_dmamap_t map, vm_offset_t vaddr, bpage->busaddr |= addr & PAGE_MASK; } bpage->datavaddr = vaddr; - /* PHYS_TO_VM_PAGE() will truncate unaligned addresses. */ bpage->datapage = PHYS_TO_VM_PAGE(addr); bpage->dataoffs = addr & PAGE_MASK; bpage->datacount = size; |