Function get_rcba_phys

util/intelmetool/src/rcba.c:13–41

Returns the physical RCBA base address or zero on error. */

/* Returns the physical RCBA base address or zero on error. */
u32 get_rcba_phys(void)
{
	struct pci_access *pacc;
	struct pci_dev *sb;
	uint32_t rcba_phys;

	pacc = pci_alloc();
	pacc->method = PCI_ACCESS_I386_TYPE1;

	pci_init(pacc);
	pci_scan_bus(pacc);

	sb = pci_get_dev(pacc, 0, 0, 0x1f, 0);
	if (!sb) {
		printf("Uh oh, southbridge not on BDF(0:31:0), please report "
		       "this error, exiting.\n");
		pci_cleanup(pacc);
		return 0;
	}
	pci_fill_info(sb, PCI_FILL_IDENT | PCI_FILL_BASES | PCI_FILL_SIZES |
			  PCI_FILL_CLASS);

	rcba_phys = pci_read_long(sb, 0xf0) & 0xfffffffe;

	pci_free_dev(sb);
	pci_cleanup(pacc);

	return rcba_phys;
}

/*
 * Writes 'val' to RCBA register at address 'addr'.