60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
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/* boot_log.h — 跨 UTSM/DSK/应用 ELF 的启动日志环形缓冲（freestanding，无 libc）
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*
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* boot_log_info 由 UTSM 在静态内存中创建，经 dsk_boot_context.utsm_state 传递。
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* DSK 注册 flush 回调，将缓冲写入 FAT32: SYSTEM/DESHAB64/DEV/BOOTLOG.TXT
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* （DEV 目录不存在时回退 ESP 根目录 BOOTLOG.TXT）。
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*/
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#ifndef BOOT_LOG_H
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#define BOOT_LOG_H
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typedef unsigned int u32;
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typedef unsigned long long u64;
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#define BOOT_LOG_MAGIC 0x424C4746u /* "BLGF" */
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#define BOOT_LOG_VERSION 1u
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typedef struct boot_log_info boot_log_info;
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typedef int (*boot_log_flush_fn)(void);
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struct boot_log_info {
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u32 magic;
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u32 version;
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char *buf;
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u32 capacity;
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u32 length;
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u32 dropped;
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boot_log_flush_fn flush;
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};
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static inline void boot_log_append(boot_log_info *bi, const char *s) {
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if (!bi || bi->magic != BOOT_LOG_MAGIC || !s || !bi->buf)
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return;
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while (*s) {
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if (bi->length < bi->capacity)
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bi->buf[bi->length++] = *s;
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else
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bi->dropped++;
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s++;
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}
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}
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static inline void boot_log_bind(boot_log_info **slot, u64 utsm_state) {
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if (!slot)
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return;
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*slot = 0;
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if (!utsm_state)
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return;
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boot_log_info *bi = (boot_log_info *)(u64)utsm_state;
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if (bi && bi->magic == BOOT_LOG_MAGIC && bi->buf && bi->capacity)
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*slot = bi;
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}
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static inline int boot_log_try_flush(boot_log_info *bi) {
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if (bi && bi->flush)
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return bi->flush();
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return -1;
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}
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#endif /* BOOT_LOG_H */
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