1 /* 2 * Copyright 2014 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs <bskeggs@redhat.com> 23 */ 24 #include <subdev/bios.h> 25 #include <subdev/bios/bit.h> 26 #include <subdev/bios/image.h> 27 #include <subdev/bios/pmu.h> 28 29 static u32 30 weirdo_pointer(struct nvkm_bios *bios, u32 data) 31 { 32 struct nvbios_image image; 33 int idx = 0; 34 if (nvbios_image(bios, idx++, &image)) { 35 data -= image.size; 36 while (nvbios_image(bios, idx++, &image)) { 37 if (image.type == 0xe0) 38 return image.base + data; 39 } 40 } 41 return 0; 42 } 43 44 u32 45 nvbios_pmuTe(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) 46 { 47 struct bit_entry bit_p; 48 u32 data = 0; 49 50 if (!bit_entry(bios, 'p', &bit_p)) { 51 if (bit_p.version == 2 && bit_p.length >= 4) 52 data = nvbios_rd32(bios, bit_p.offset + 0x00); 53 if ((data = weirdo_pointer(bios, data))) { 54 *ver = nvbios_rd08(bios, data + 0x00); /* maybe? */ 55 *hdr = nvbios_rd08(bios, data + 0x01); 56 *len = nvbios_rd08(bios, data + 0x02); 57 *cnt = nvbios_rd08(bios, data + 0x03); 58 } 59 } 60 61 return data; 62 } 63 64 u32 65 nvbios_pmuTp(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len, 66 struct nvbios_pmuT *info) 67 { 68 u32 data = nvbios_pmuTe(bios, ver, hdr, cnt, len); 69 memset(info, 0x00, sizeof(*info)); 70 switch (!!data * *ver) { 71 default: 72 break; 73 } 74 return data; 75 } 76 77 u32 78 nvbios_pmuEe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr) 79 { 80 u8 cnt, len; 81 u32 data = nvbios_pmuTe(bios, ver, hdr, &cnt, &len); 82 if (data && idx < cnt) { 83 data = data + *hdr + (idx * len); 84 *hdr = len; 85 return data; 86 } 87 return 0; 88 } 89 90 u32 91 nvbios_pmuEp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr, 92 struct nvbios_pmuE *info) 93 { 94 u32 data = nvbios_pmuEe(bios, idx, ver, hdr); 95 memset(info, 0x00, sizeof(*info)); 96 switch (!!data * *ver) { 97 default: 98 info->type = nvbios_rd08(bios, data + 0x00); 99 info->data = nvbios_rd32(bios, data + 0x02); 100 break; 101 } 102 return data; 103 } 104 105 bool 106 nvbios_pmuRm(struct nvkm_bios *bios, u8 type, struct nvbios_pmuR *info) 107 { 108 struct nvbios_pmuE pmuE; 109 u8 ver, hdr, idx = 0; 110 u32 data; 111 memset(info, 0x00, sizeof(*info)); 112 while ((data = nvbios_pmuEp(bios, idx++, &ver, &hdr, &pmuE))) { 113 if ( pmuE.type == type && 114 (data = weirdo_pointer(bios, pmuE.data))) { 115 info->init_addr_pmu = nvbios_rd32(bios, data + 0x08); 116 info->args_addr_pmu = nvbios_rd32(bios, data + 0x0c); 117 info->boot_addr = data + 0x30; 118 info->boot_addr_pmu = nvbios_rd32(bios, data + 0x10) + 119 nvbios_rd32(bios, data + 0x18); 120 info->boot_size = nvbios_rd32(bios, data + 0x1c) - 121 nvbios_rd32(bios, data + 0x18); 122 info->code_addr = info->boot_addr + info->boot_size; 123 info->code_addr_pmu = info->boot_addr_pmu + 124 info->boot_size; 125 info->code_size = nvbios_rd32(bios, data + 0x20); 126 info->data_addr = data + 0x30 + 127 nvbios_rd32(bios, data + 0x24); 128 info->data_addr_pmu = nvbios_rd32(bios, data + 0x28); 129 info->data_size = nvbios_rd32(bios, data + 0x2c); 130 return true; 131 } 132 } 133 return false; 134 } 135