| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | #undef DEBUG |
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| 3 | |
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| 4 | #include <linux/kernel.h> |
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| 5 | #include <linux/string.h> |
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| 6 | #include <linux/ioport.h> |
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| 7 | #include <linux/etherdevice.h> |
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| 8 | #include <linux/of_address.h> |
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| 9 | #include <asm/prom.h> |
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| 10 | |
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| 11 | void of_parse_dma_window(struct device_node *dn, const __be32 *dma_window, |
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| 12 | unsigned long *busno, unsigned long *phys, |
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| 13 | unsigned long *size) |
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| 14 | { |
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| 15 | u32 cells; |
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| 16 | const __be32 *prop; |
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| 17 | |
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| 18 | /* busno is always one cell */ |
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| 19 | *busno = of_read_number(cell: dma_window, size: 1); |
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| 20 | dma_window++; |
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| 21 | |
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| 22 | prop = of_get_property(node: dn, name: "ibm,#dma-address-cells" , NULL); |
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| 23 | if (!prop) |
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| 24 | prop = of_get_property(node: dn, name: "#address-cells" , NULL); |
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| 25 | |
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| 26 | cells = prop ? of_read_number(cell: prop, size: 1) : of_n_addr_cells(np: dn); |
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| 27 | *phys = of_read_number(cell: dma_window, size: cells); |
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| 28 | |
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| 29 | dma_window += cells; |
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| 30 | |
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| 31 | prop = of_get_property(node: dn, name: "ibm,#dma-size-cells" , NULL); |
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| 32 | cells = prop ? of_read_number(cell: prop, size: 1) : of_n_size_cells(np: dn); |
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| 33 | *size = of_read_number(cell: dma_window, size: cells); |
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| 34 | } |
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| 35 | |
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