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26 lines
755 B
26 lines
755 B
7 years ago
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#ifndef _RISCV_HTIF_H
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#define _RISCV_HTIF_H
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#include <stdint.h>
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#if __riscv_xlen == 64
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# define TOHOST_CMD(dev, cmd, payload) \
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(((uint64_t)(dev) << 56) | ((uint64_t)(cmd) << 48) | (uint64_t)(payload))
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#else
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# define TOHOST_CMD(dev, cmd, payload) ({ \
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if ((dev) || (cmd)) __builtin_trap(); \
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(payload); })
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#endif
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#define FROMHOST_DEV(fromhost_value) ((uint64_t)(fromhost_value) >> 56)
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#define FROMHOST_CMD(fromhost_value) ((uint64_t)(fromhost_value) << 8 >> 56)
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#define FROMHOST_DATA(fromhost_value) ((uint64_t)(fromhost_value) << 16 >> 16)
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extern uintptr_t htif;
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void query_htif(uintptr_t dtb);
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void htif_console_putchar(uint8_t);
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int htif_console_getchar();
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void htif_poweroff() __attribute__((noreturn));
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void htif_syscall(uintptr_t);
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#endif
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