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40 lines
917 B
C
40 lines
917 B
C
#ifndef H_ECALL
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#define H_ECALL
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#include "sched.h"
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/* ecall codes are defined here
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*
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*
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*/
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enum ecall_codes {
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ECALL_SPAWN = 1,
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ECALL_SLEEP = 2,
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ECALL_JOIN = 3,
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ECALL_KILL = 4,
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ECALL_EXIT = 5,
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};
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#define ECALL_TABLE_LEN 16
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enum ecall_errors {
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ENOCODE = -1, // invalid syscall code
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EINVAL = -2, // invalid argument value
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ENOMEM = -3, // not enough memory
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};
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// initializer for ecall lookup table
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void init_ecall_table();
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// syscall handlers, are setup in the mtvec csr
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int ecall_handle_spawn(int*, ProcessControlBlock*);
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int ecall_handle_sleep(int*, ProcessControlBlock*);
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int ecall_handle_join(int*, ProcessControlBlock*);
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int ecall_handle_kill(int*, ProcessControlBlock*);
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int ecall_handle_exit(int*, ProcessControlBlock*);
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void handle_exception(int ecode, int mtval);
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void __attribute__((__noreturn__)) trap_handle(int interrupt_bit, int code, int mtval);
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#endif |