diff options
Diffstat (limited to 'common')
| -rw-r--r-- | common/fdt_support.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c index 8ceeb0f..d483d66 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -35,6 +35,33 @@ */ DECLARE_GLOBAL_DATA_PTR; +/** + * fdt_getprop_u32_default - Find a node and return it's property or a default + * + * @fdt: ptr to device tree + * @path: path of node + * @prop: property name + * @dflt: default value if the property isn't found + * + * Convenience function to find a node and return it's property or a + * default value if it doesn't exist. + */ +u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop, + const u32 dflt) +{ + const u32 *val; + int off; + + off = fdt_path_offset(fdt, path); + if (off < 0) + return dflt; + + val = fdt_getprop(fdt, off, prop, NULL); + if (val) + return *val; + else + return dflt; +} /** * fdt_find_and_setprop: Find a node and set it's property @@ -593,3 +620,72 @@ int fdt_resize(void *blob) return actualsize; } + +#ifdef CONFIG_PCI +#define CONFIG_SYS_PCI_NR_INBOUND_WIN 3 + +#define FDT_PCI_PREFETCH (0x40000000) +#define FDT_PCI_MEM32 (0x02000000) +#define FDT_PCI_IO (0x01000000) +#define FDT_PCI_MEM64 (0x03000000) + +int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) { + + int addrcell, sizecell, len, r; + u32 *dma_range; + /* sized based on pci addr cells, size-cells, & address-cells */ + u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN]; + + addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1); + sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1); + + dma_range = &dma_ranges[0]; + for (r = 0; r < hose->region_count; r++) { + u64 bus_start, phys_start, size; + + /* skip if !PCI_REGION_MEMORY */ + if (!(hose->regions[r].flags & PCI_REGION_MEMORY)) + continue; + + bus_start = (u64)hose->regions[r].bus_start; + phys_start = (u64)hose->regions[r].phys_start; + size = (u64)hose->regions[r].size; + + dma_range[0] = 0; + if (size > 0x100000000ull) + dma_range[0] |= FDT_PCI_MEM64; + else + dma_range[0] |= FDT_PCI_MEM32; + if (hose->regions[r].flags & PCI_REGION_PREFETCH) + dma_range[0] |= FDT_PCI_PREFETCH; +#ifdef CONFIG_SYS_PCI_64BIT + dma_range[1] = bus_start >> 32; +#else + dma_range[1] = 0; +#endif + dma_range[2] = bus_start & 0xffffffff; + + if (addrcell == 2) { + dma_range[3] = phys_start >> 32; + dma_range[4] = phys_start & 0xffffffff; + } else { + dma_range[3] = phys_start & 0xffffffff; + } + + if (sizecell == 2) { + dma_range[3 + addrcell + 0] = size >> 32; + dma_range[3 + addrcell + 1] = size & 0xffffffff; + } else { + dma_range[3 + addrcell + 0] = size & 0xffffffff; + } + + dma_range += (3 + addrcell + sizecell); + } + + len = dma_range - &dma_ranges[0]; + if (len) + fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4); + + return 0; +} +#endif |