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, 7 insertions, 15 deletions

diff --git a/arch/x86/cpu/coreboot/pci.c b/arch/x86/cpu/coreboot/pci.c
index 33f16a3079..4778f71600 100644
--- a/arch/x86/cpu/coreboot/pci.c
+++ b/arch/x86/cpu/coreboot/pci.c
@@ -13,8 +13,6 @@
 #include <pci.h>
 #include <asm/pci.h>
 
-static struct pci_controller coreboot_hose;
-
 static void config_pci_bridge(struct pci_controller *hose, pci_dev_t dev,
 			      struct pci_config_table *table)
 {
@@ -31,19 +29,13 @@ static struct pci_config_table pci_coreboot_config_table[] = {
 	{}
 };
 
-void pci_init_board(void)
+void board_pci_setup_hose(struct pci_controller *hose)
 {
-	coreboot_hose.config_table = pci_coreboot_config_table;
-	coreboot_hose.first_busno = 0;
-	coreboot_hose.last_busno = 0;
-
-	pci_set_region(coreboot_hose.regions + 0, 0x0, 0x0, 0xffffffff,
-		PCI_REGION_MEM);
-	coreboot_hose.region_count = 1;
-
-	pci_setup_type1(&coreboot_hose);
-
-	pci_register_hose(&coreboot_hose);
+	hose->config_table = pci_coreboot_config_table;
+	hose->first_busno = 0;
+	hose->last_busno = 0;
 
-	pci_hose_scan(&coreboot_hose);
+	pci_set_region(hose->regions + 0, 0x0, 0x0, 0xffffffff,
+		       PCI_REGION_MEM);
+	hose->region_count = 1;
 }