projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| f0921f50 | 1 | // SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) |
| 999a78d5 MY |
2 | /* |
| 3 | * libfdt - Flat Device Tree manipulation | |
| 4 | * Copyright (C) 2014 David Gibson <[email protected]> | |
| ce2dae3a | 5 | * Copyright (C) 2018 embedded brains GmbH |
| 999a78d5 MY |
6 | */ |
| 7 | #include "libfdt_env.h" | |
| 8 | ||
| 9 | #include <fdt.h> | |
| 10 | #include <libfdt.h> | |
| 11 | ||
| 12 | #include "libfdt_internal.h" | |
| 13 | ||
| ce2dae3a | 14 | static int fdt_cells(const void *fdt, int nodeoffset, const char *name) |
| 999a78d5 | 15 | { |
| ce2dae3a | 16 | const fdt32_t *c; |
| 8076fc29 | 17 | uint32_t val; |
| 999a78d5 MY |
18 | int len; |
| 19 | ||
| ce2dae3a MB |
20 | c = fdt_getprop(fdt, nodeoffset, name, &len); |
| 21 | if (!c) | |
| 0ba41ce1 | 22 | return len; |
| 999a78d5 | 23 | |
| ce2dae3a | 24 | if (len != sizeof(*c)) |
| 999a78d5 MY |
25 | return -FDT_ERR_BADNCELLS; |
| 26 | ||
| ce2dae3a | 27 | val = fdt32_to_cpu(*c); |
| 8076fc29 | 28 | if (val > FDT_MAX_NCELLS) |
| 999a78d5 MY |
29 | return -FDT_ERR_BADNCELLS; |
| 30 | ||
| 8076fc29 | 31 | return (int)val; |
| 999a78d5 MY |
32 | } |
| 33 | ||
| ce2dae3a | 34 | int fdt_address_cells(const void *fdt, int nodeoffset) |
| 999a78d5 | 35 | { |
| 0ba41ce1 MB |
36 | int val; |
| 37 | ||
| 38 | val = fdt_cells(fdt, nodeoffset, "#address-cells"); | |
| 8076fc29 MB |
39 | if (val == 0) |
| 40 | return -FDT_ERR_BADNCELLS; | |
| 0ba41ce1 MB |
41 | if (val == -FDT_ERR_NOTFOUND) |
| 42 | return 2; | |
| 43 | return val; | |
| ce2dae3a | 44 | } |
| 999a78d5 | 45 | |
| ce2dae3a MB |
46 | int fdt_size_cells(const void *fdt, int nodeoffset) |
| 47 | { | |
| 0ba41ce1 MB |
48 | int val; |
| 49 | ||
| 50 | val = fdt_cells(fdt, nodeoffset, "#size-cells"); | |
| 51 | if (val == -FDT_ERR_NOTFOUND) | |
| 52 | return 1; | |
| 53 | return val; | |
| 999a78d5 | 54 | } |
| f0921f50 SG |
55 | |
| 56 | /* This function assumes that [address|size]_cells is 1 or 2 */ | |
| 57 | int fdt_appendprop_addrrange(void *fdt, int parent, int nodeoffset, | |
| 58 | const char *name, uint64_t addr, uint64_t size) | |
| 59 | { | |
| 60 | int addr_cells, size_cells, ret; | |
| 61 | uint8_t data[sizeof(fdt64_t) * 2], *prop; | |
| 62 | ||
| 63 | ret = fdt_address_cells(fdt, parent); | |
| 64 | if (ret < 0) | |
| 65 | return ret; | |
| 66 | addr_cells = ret; | |
| 67 | ||
| 68 | ret = fdt_size_cells(fdt, parent); | |
| 69 | if (ret < 0) | |
| 70 | return ret; | |
| 71 | size_cells = ret; | |
| 72 | ||
| 73 | /* check validity of address */ | |
| 74 | prop = data; | |
| 75 | if (addr_cells == 1) { | |
| 76 | if ((addr > UINT32_MAX) || ((UINT32_MAX + 1 - addr) < size)) | |
| 77 | return -FDT_ERR_BADVALUE; | |
| 78 | ||
| 79 | fdt32_st(prop, (uint32_t)addr); | |
| 80 | } else if (addr_cells == 2) { | |
| 81 | fdt64_st(prop, addr); | |
| 82 | } else { | |
| 83 | return -FDT_ERR_BADNCELLS; | |
| 84 | } | |
| 85 | ||
| 86 | /* check validity of size */ | |
| 87 | prop += addr_cells * sizeof(fdt32_t); | |
| 88 | if (size_cells == 1) { | |
| 89 | if (size > UINT32_MAX) | |
| 90 | return -FDT_ERR_BADVALUE; | |
| 91 | ||
| 92 | fdt32_st(prop, (uint32_t)size); | |
| 93 | } else if (size_cells == 2) { | |
| 94 | fdt64_st(prop, size); | |
| 95 | } else { | |
| 96 | return -FDT_ERR_BADNCELLS; | |
| 97 | } | |
| 98 | ||
| 99 | return fdt_appendprop(fdt, nodeoffset, name, data, | |
| 100 | (addr_cells + size_cells) * sizeof(fdt32_t)); | |
| 101 | } |