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| author | jah <jah@FreeBSD.org> | 2015-10-23 12:03:25 +0000 |
|---|---|---|
| committer | jah <jah@FreeBSD.org> | 2015-10-23 12:03:25 +0000 |
| commit | 075add24963a3db8760d588931ebad0e20259482 (patch) | |
| tree | c4548edd5edeaf22ba0e2fba0d139a2ee16e021d /sys/arm | |
| parent | 7eb36dd3f94bbdd22cd44fd0fd1c86eb868bef1f (diff) | |
| download | FreeBSD-src-075add24963a3db8760d588931ebad0e20259482.zip FreeBSD-src-075add24963a3db8760d588931ebad0e20259482.tar.gz | |
Remove unclear comment about address truncation in busdma. Add (hopefully much clearer) comment at declaration of PHYS_TO_VM_PAGE().
Noted by: avg
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 a945b63..66d4612 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 e7ec8b1..00c7f23 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; |
