device/pci_ops: Move questionable pci_locate() variants

These are defined for __SIMPLE_DEVICE__ when PCI
enumeration has not happened yet. These should not
really try to probe devices other than those on bus 0.

It's hard to track but there maybe cases of southbridge
being located on bus 2 and available for configuration, so
I rather leave the code unchanged. Just move these out of
arch/io.h because they cause build failures if one attempts
to include <arch/pci_ops.h> before <arch/io.h>.

There are two direct copies for ROMCC bootblocks to
avoid inlining them elsewhere.

Change-Id: Ida2919a5d83fe5ea89284ffbd8ead382e4312524
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/31304
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/device/pci_early.c b/src/device/pci_early.c
index 9086e64b85..ea2ebd5033 100644
--- a/src/device/pci_early.c
+++ b/src/device/pci_early.c
@@ -165,3 +165,34 @@ void pci_early_bridge_init(void)
 
 	pci_early_mmio_window(p2p_bridge, CONFIG_EARLY_PCI_MMIO_BASE, 0x4000);
 }
+
+/* FIXME: A lot of issues using the following, please avoid.
+ * Assumes 256 PCI busses, scans them all even when PCI bridges are still
+ * disabled. Probes all functions even if 0 is not present.
+ */
+pci_devfn_t pci_locate_device(unsigned int pci_id, pci_devfn_t dev)
+{
+	for (; dev <= PCI_DEV(255, 31, 7); dev += PCI_DEV(0, 0, 1)) {
+		unsigned int id;
+		id = pci_read_config32(dev, 0);
+		if (id == pci_id)
+			return dev;
+	}
+	return PCI_DEV_INVALID;
+}
+
+pci_devfn_t pci_locate_device_on_bus(unsigned int pci_id, unsigned int bus)
+{
+	pci_devfn_t dev, last;
+
+	dev = PCI_DEV(bus, 0, 0);
+	last = PCI_DEV(bus, 31, 7);
+
+	for (; dev <= last; dev += PCI_DEV(0, 0, 1)) {
+		unsigned int id;
+		id = pci_read_config32(dev, 0);
+		if (id == pci_id)
+			return dev;
+	}
+	return PCI_DEV_INVALID;
+}