x86: Support use of PCI before relocation
Add support for using PCI before SDRAM is available, using early malloc()
and global_data.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/pci.c b/arch/x86/cpu/pci.c
index 0741dc2..2d8f16c 100644
--- a/arch/x86/cpu/pci.c
+++ b/arch/x86/cpu/pci.c
@@ -10,15 +10,36 @@
*/
#include <common.h>
+#include <errno.h>
+#include <malloc.h>
#include <pci.h>
#include <asm/pci.h>
static struct pci_controller x86_hose;
+int pci_early_init_hose(struct pci_controller **hosep)
+{
+ struct pci_controller *hose;
+
+ hose = calloc(1, sizeof(struct pci_controller));
+ if (!hose)
+ return -ENOMEM;
+
+ board_pci_setup_hose(hose);
+ pci_setup_type1(hose);
+ gd->arch.hose = hose;
+ *hosep = hose;
+
+ return 0;
+}
+
void pci_init_board(void)
{
struct pci_controller *hose = &x86_hose;
+ /* Stop using the early hose */
+ gd->arch.hose = NULL;
+
board_pci_setup_hose(hose);
pci_setup_type1(hose);
pci_register_hose(hose);