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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
#ifndef HW_XTENSA_BOOTPARAM
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#define HW_XTENSA_BOOTPARAM
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#define BP_TAG_COMMAND_LINE 0x1001 /* command line (0-terminated string)*/
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#define BP_TAG_INITRD 0x1002 /* ramdisk addr and size (bp_meminfo) */
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#define BP_TAG_MEMORY 0x1003 /* memory addr and size (bp_meminfo) */
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#define BP_TAG_SERIAL_BAUDRATE 0x1004 /* baud rate of current console. */
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#define BP_TAG_SERIAL_PORT 0x1005 /* serial device of current console */
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#define BP_TAG_FDT 0x1006 /* flat device tree addr */
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#define BP_TAG_FIRST 0x7B0B /* first tag with a version number */
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#define BP_TAG_LAST 0x7E0B /* last tag */
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typedef struct BpTag {
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uint16_t tag;
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uint16_t size;
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} BpTag;
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typedef struct BpMemInfo {
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uint32_t type;
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uint32_t start;
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uint32_t end;
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} BpMemInfo;
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#define MEMORY_TYPE_CONVENTIONAL 0x1000
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#define MEMORY_TYPE_NONE 0x2000
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static inline size_t get_tag_size(size_t data_size)
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{
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return data_size + sizeof(BpTag) + 4;
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}
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static inline ram_addr_t put_tag(ram_addr_t addr, uint16_t tag,
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size_t size, const void *data)
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{
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BpTag bp_tag = {
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.tag = tswap16(tag),
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.size = tswap16((size + 3) & ~3),
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};
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cpu_physical_memory_write(addr, &bp_tag, sizeof(bp_tag));
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addr += sizeof(bp_tag);
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cpu_physical_memory_write(addr, data, size);
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addr += (size + 3) & ~3;
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return addr;
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}
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#endif
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