From: Toni Wilen <twilen@winuae.net>
Date: Wed, 13 Mar 2024 18:27:00 +0000 (+0200)
Subject: "External" (SVGA chip) PCI device BAR size fix if BAR set without alignment detection.
X-Git-Tag: 5300~94
X-Git-Url: https://git.unchartedbackwaters.co.uk/w/?a=commitdiff_plain;h=ce18eba8476ffb13d6b4d9b3454f2297db721ffc;p=francis%2Fwinuae.git

"External" (SVGA chip) PCI device BAR size fix if BAR set without alignment detection.
---

diff --git a/pci.cpp b/pci.cpp
index 3c3ab70f..6b99381c 100644
--- a/pci.cpp
+++ b/pci.cpp
@@ -542,6 +542,26 @@ static void update_pci_config(uaecptr addr, int size)
 			}
 		} else {
 			pcibs->bar[i] = 0;
+			// pre-set bar size when indirect PCI config
+			if (pcibs->board->pci_put_config) {
+				uae_u32 tbar = pcibs->board->pci_get_config(off + 3) << 24;
+				tbar |= pcibs->board->pci_get_config(off + 2) << 16;
+				tbar |= pcibs->board->pci_get_config(off + 1) << 8;
+				tbar |= pcibs->board->pci_get_config(off + 0) << 0;
+				pcibs->board->pci_put_config(off + 3, 0xff);
+				pcibs->board->pci_put_config(off + 2, 0xff);
+				pcibs->board->pci_put_config(off + 1, 0xff);
+				pcibs->board->pci_put_config(off + 0, 0xff);
+				uae_u32 bar = pcibs->board->pci_get_config(off + 3) << 24;
+				bar |= pcibs->board->pci_get_config(off + 2) << 16;
+				bar |= pcibs->board->pci_get_config(off + 1) << 8;
+				bar |= pcibs->board->pci_get_config(off + 0) << 0;
+				pcibs->bar_size[i] = ~((bar & ~1) - 1);
+				pcibs->board->pci_put_config(off + 3, tbar >> 24);
+				pcibs->board->pci_put_config(off + 2, tbar >> 16);
+				pcibs->board->pci_put_config(off + 1, tbar >> 8);
+				pcibs->board->pci_put_config(off + 0, tbar >> 0);
+			}
 		}
 	}
 	if (pcibs->board->pci_put_config) {