arch/mips/pci/pci-ip27.c

Source file repositories/reference/linux-study-clean/arch/mips/pci/pci-ip27.c

File Facts

System
Linux kernel
Corpus path
arch/mips/pci/pci-ip27.c
Extension
.c
Size
1202 bytes
Lines
46
Domain
Architecture Layer
Bucket
arch/mips
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/io.h>

#include <asm/sn/addrs.h>
#include <asm/sn/types.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/agent.h>
#include <asm/sn/ioc3.h>
#include <asm/pci/bridge.h>

#ifdef CONFIG_NUMA
int pcibus_to_node(struct pci_bus *bus)
{
	struct bridge_controller *bc = BRIDGE_CONTROLLER(bus);

	return bc->nasid;
}
EXPORT_SYMBOL(pcibus_to_node);
#endif /* CONFIG_NUMA */

static void ip29_fixup_phy(struct pci_dev *dev)
{
	int nasid = pcibus_to_node(dev->bus);
	u32 sid;

	if (nasid != 1)
		return; /* only needed on second module */

	/* enable ethernet PHY on IP29 systemboard */
	pci_read_config_dword(dev, PCI_SUBSYSTEM_VENDOR_ID, &sid);
	if (sid == (PCI_VENDOR_ID_SGI | (IOC3_SUBSYS_IP29_SYSBOARD) << 16))
		REMOTE_HUB_S(nasid, MD_LED0, 0x09);
}

DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_SGI, PCI_DEVICE_ID_SGI_IOC3,
			ip29_fixup_phy);

Annotation

Implementation Notes