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devices/runtime: new syscall API
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65566ec710
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@ -1,19 +1,21 @@
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from llvm import core as lc
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from llvm import target as lt
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from artiq.compiler import ir_values
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lt.initialize_all()
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_syscalls = [
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("rpc", "i+:i"),
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("gpio_set", "ii:v"),
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("rtio_set", "iii:v"),
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("rtio_sync", "i:v"),
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("dds_program", "ii:v"),
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]
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_syscalls = {
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"rpc": "i+:i",
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"gpio_set": "ii:n",
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"rtio_set": "iii:n",
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"rtio_sync": "i:n",
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"dds_program": "ii:n",
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}
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def _str_to_functype(s):
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_chr_to_type = {
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"v": lc.Type.void,
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"n": lc.Type.void,
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"i": lc.Type.int
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}
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assert(s[-2] == ":")
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@ -31,22 +33,30 @@ def _str_to_functype(s):
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class LinkInterface:
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def set_module(self, module):
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self.module = module
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self.var_arg_fixcount = dict()
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for func_name, func_type_str in _syscalls:
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for func_name, func_type_str in _syscalls.items():
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var_arg_fixcount, func_type = _str_to_functype(func_type_str)
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if var_arg_fixcount is not None:
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self.var_arg_fixcount[func_name] = var_arg_fixcount
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module.add_function(func_type, "__syscall_"+func_name)
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self.module.add_function(func_type, "__syscall_"+func_name)
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self.module = module
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def emit_syscall(self, builder, syscall_name, args):
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if syscall_name in self.var_arg_fixcount:
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fixcount = self.var_arg_fixcount[syscall_name]
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args = args[:fixcount] \
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+ [lc.Constant.int(lc.Type.int(), len(args) - fixcount)] \
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+ args[fixcount:]
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return builder.call(self.module.get_function_named("__syscall_"+syscall_name), args)
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def syscall(self, syscall_name, args, builder):
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_chr_to_value = {
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"n": ir_values.VNone,
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"i": ir_values.VInt
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}
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r = _chr_to_value[_syscalls[syscall_name][-1]]()
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if builder is not None:
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args = [arg.llvm_value for arg in args]
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if syscall_name in self.var_arg_fixcount:
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fixcount = self.var_arg_fixcount[syscall_name]
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args = args[:fixcount] \
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+ [lc.Constant.int(lc.Type.int(), len(args) - fixcount)] \
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+ args[fixcount:]
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llvm_function = self.module.get_function_named("__syscall_"+syscall_name)
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r.llvm_value = builder.call(llvm_function, args)
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return r
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class Environment(LinkInterface):
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def __init__(self, ref_period):
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