1 | /* SPDX-License-Identifier: BSD-3-Clause */ |
2 | #ifndef _LINUX_FW_CFG_H |
3 | #define _LINUX_FW_CFG_H |
4 | |
5 | #include <linux/types.h> |
6 | |
7 | #define FW_CFG_ACPI_DEVICE_ID "QEMU0002" |
8 | |
9 | /* selector key values for "well-known" fw_cfg entries */ |
10 | #define FW_CFG_SIGNATURE 0x00 |
11 | #define FW_CFG_ID 0x01 |
12 | #define FW_CFG_UUID 0x02 |
13 | #define FW_CFG_RAM_SIZE 0x03 |
14 | #define FW_CFG_NOGRAPHIC 0x04 |
15 | #define FW_CFG_NB_CPUS 0x05 |
16 | #define FW_CFG_MACHINE_ID 0x06 |
17 | #define FW_CFG_KERNEL_ADDR 0x07 |
18 | #define FW_CFG_KERNEL_SIZE 0x08 |
19 | #define FW_CFG_KERNEL_CMDLINE 0x09 |
20 | #define FW_CFG_INITRD_ADDR 0x0a |
21 | #define FW_CFG_INITRD_SIZE 0x0b |
22 | #define FW_CFG_BOOT_DEVICE 0x0c |
23 | #define FW_CFG_NUMA 0x0d |
24 | #define 0x0e |
25 | #define FW_CFG_MAX_CPUS 0x0f |
26 | #define FW_CFG_KERNEL_ENTRY 0x10 |
27 | #define FW_CFG_KERNEL_DATA 0x11 |
28 | #define FW_CFG_INITRD_DATA 0x12 |
29 | #define FW_CFG_CMDLINE_ADDR 0x13 |
30 | #define FW_CFG_CMDLINE_SIZE 0x14 |
31 | #define FW_CFG_CMDLINE_DATA 0x15 |
32 | #define FW_CFG_SETUP_ADDR 0x16 |
33 | #define FW_CFG_SETUP_SIZE 0x17 |
34 | #define FW_CFG_SETUP_DATA 0x18 |
35 | #define FW_CFG_FILE_DIR 0x19 |
36 | |
37 | #define FW_CFG_FILE_FIRST 0x20 |
38 | #define FW_CFG_FILE_SLOTS_MIN 0x10 |
39 | |
40 | #define FW_CFG_WRITE_CHANNEL 0x4000 |
41 | #define FW_CFG_ARCH_LOCAL 0x8000 |
42 | #define FW_CFG_ENTRY_MASK (~(FW_CFG_WRITE_CHANNEL | FW_CFG_ARCH_LOCAL)) |
43 | |
44 | #define FW_CFG_INVALID 0xffff |
45 | |
46 | /* width in bytes of fw_cfg control register */ |
47 | #define FW_CFG_CTL_SIZE 0x02 |
48 | |
49 | /* fw_cfg "file name" is up to 56 characters (including terminating nul) */ |
50 | #define FW_CFG_MAX_FILE_PATH 56 |
51 | |
52 | /* size in bytes of fw_cfg signature */ |
53 | #define FW_CFG_SIG_SIZE 4 |
54 | |
55 | /* FW_CFG_ID bits */ |
56 | #define FW_CFG_VERSION 0x01 |
57 | #define FW_CFG_VERSION_DMA 0x02 |
58 | |
59 | /* fw_cfg file directory entry type */ |
60 | struct fw_cfg_file { |
61 | __be32 size; |
62 | __be16 select; |
63 | __u16 reserved; |
64 | char name[FW_CFG_MAX_FILE_PATH]; |
65 | }; |
66 | |
67 | /* FW_CFG_DMA_CONTROL bits */ |
68 | #define FW_CFG_DMA_CTL_ERROR 0x01 |
69 | #define FW_CFG_DMA_CTL_READ 0x02 |
70 | #define FW_CFG_DMA_CTL_SKIP 0x04 |
71 | #define FW_CFG_DMA_CTL_SELECT 0x08 |
72 | #define FW_CFG_DMA_CTL_WRITE 0x10 |
73 | |
74 | #define FW_CFG_DMA_SIGNATURE 0x51454d5520434647ULL /* "QEMU CFG" */ |
75 | |
76 | /* Control as first field allows for different structures selected by this |
77 | * field, which might be useful in the future |
78 | */ |
79 | struct fw_cfg_dma_access { |
80 | __be32 control; |
81 | __be32 length; |
82 | __be64 address; |
83 | }; |
84 | |
85 | #define FW_CFG_VMCOREINFO_FILENAME "etc/vmcoreinfo" |
86 | |
87 | #define FW_CFG_VMCOREINFO_FORMAT_NONE 0x0 |
88 | #define FW_CFG_VMCOREINFO_FORMAT_ELF 0x1 |
89 | |
90 | struct fw_cfg_vmcoreinfo { |
91 | __le16 host_format; |
92 | __le16 guest_format; |
93 | __le32 size; |
94 | __le64 paddr; |
95 | }; |
96 | |
97 | #endif |
98 | |