x86: Refactor PCI to permit alternate init

We want access PCI earlier in the init sequence, so refactor the code so
that it does not require use of a BSS variable to work. This will allow us
to use early malloc() to store information about a PCI hose.

Common PCI code moves to arch/x86/cpu/pci.c and a new
board_pci_setup_hose() function is provided by boards to set up the (single)
hose used by that board.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

1 files changed, 27 insertions, 0 deletions

diff --git a/arch/x86/cpu/pci.c b/arch/x86/cpu/pci.c
new file mode 100644
index 0000000..0741dc2
--- /dev/null
+++ b/arch/x86/cpu/pci.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * (C) Copyright 2008,2009
+ * Graeme Russ, <graeme.russ@gmail.com>
+ *
+ * (C) Copyright 2002
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <pci.h>
+#include <asm/pci.h>
+
+static struct pci_controller x86_hose;
+
+void pci_init_board(void)
+{
+	struct pci_controller *hose = &x86_hose;
+
+	board_pci_setup_hose(hose);
+	pci_setup_type1(hose);
+	pci_register_hose(hose);
+
+	hose->last_busno = pci_hose_scan(hose);
+}