What does "āgataṭṭhāna" mean in the commentary to MN22

Yo pana buddhavacanaṃ uggaṇhitvā sīlassa āgataṭṭhāne sīlaṃ pūretvā samādhissa āgataṭṭhāne samādhigabbhaṃ gaṇhāpetvā vipassanāya āgataṭṭhāne vipassanaṃ paṭṭhapetvā maggaphalānaṃ āgataṭṭhāne
maggaṃ bhāvessāmi phalaṃ sacchikarissāmīti uggaṇhāti

from the Critical Pāli dictionary

āgata-ṭṭhāna

, n. [ sa. °sthāna], a) [ cf . āgata g]
Ps I 54,28 . . . ti ca . . . ti ca ~esu, “in the passages
running
( handed down ) thus . . . and thus . . .”; b) Ja
III 188,6 Sussondiyā ~aṁ vā gata-ṭṭhānaṁ vā
jānantā nāma nâhesuṁ, “they did not know what had
become of S.”;
Mp II 373,27 te bhikkhū desanāya
n’eva ~aṁ na gata-ṭṭhānaṁ addasaṁsu, “could not
make head or tail of the discourse.”