mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
35ddd068fb
... so we use the same code with Quad core cpu as old opteron. This patch is useful when acpi=off or _PXM is not there in DSDT. Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
#include <linux/init.h>
|
|
#include <linux/pci.h>
|
|
#include <asm/pci-direct.h>
|
|
#include <asm/mpspec.h>
|
|
#include <linux/cpumask.h>
|
|
#include <linux/topology.h>
|
|
|
|
/*
|
|
* This discovers the pcibus <-> node mapping on AMD K8.
|
|
*
|
|
* RED-PEN need to call this again on PCI hotplug
|
|
* RED-PEN empty cpus get reported wrong
|
|
*/
|
|
|
|
#define NODE_ID(dword) ((dword>>4) & 0x07)
|
|
#define LDT_BUS_NUMBER_REGISTER_0 0xE0
|
|
#define LDT_BUS_NUMBER_REGISTER_1 0xE4
|
|
#define LDT_BUS_NUMBER_REGISTER_2 0xE8
|
|
#define LDT_BUS_NUMBER_REGISTER_3 0xEC
|
|
#define NR_LDT_BUS_NUMBER_REGISTERS 4
|
|
#define SECONDARY_LDT_BUS_NUMBER(dword) ((dword >> 16) & 0xFF)
|
|
#define SUBORDINATE_LDT_BUS_NUMBER(dword) ((dword >> 24) & 0xFF)
|
|
|
|
#define PCI_DEVICE_ID_K8HTCONFIG 0x1100
|
|
#define PCI_DEVICE_ID_K8_10H_HTCONFIG 0x1200
|
|
#define PCI_DEVICE_ID_K8_11H_HTCONFIG 0x1300
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#define BUS_NR 256
|
|
|
|
static int mp_bus_to_node[BUS_NR];
|
|
|
|
void set_mp_bus_to_node(int busnum, int node)
|
|
{
|
|
if (busnum >= 0 && busnum < BUS_NR)
|
|
mp_bus_to_node[busnum] = node;
|
|
}
|
|
|
|
int get_mp_bus_to_node(int busnum)
|
|
{
|
|
int node = -1;
|
|
|
|
if (busnum < 0 || busnum > (BUS_NR - 1))
|
|
return node;
|
|
|
|
node = mp_bus_to_node[busnum];
|
|
|
|
/*
|
|
* let numa_node_id to decide it later in dma_alloc_pages
|
|
* if there is no ram on that node
|
|
*/
|
|
if (node != -1 && !node_online(node))
|
|
node = -1;
|
|
|
|
return node;
|
|
}
|
|
|
|
#endif
|
|
|
|
/**
|
|
* early_fill_mp_bus_to_node()
|
|
* called before pcibios_scan_root and pci_scan_bus
|
|
* fills the mp_bus_to_cpumask array based according to the LDT Bus Number
|
|
* Registers found in the K8 northbridge
|
|
*/
|
|
__init static int
|
|
early_fill_mp_bus_to_node(void)
|
|
{
|
|
#ifdef CONFIG_NUMA
|
|
int i, j;
|
|
unsigned slot;
|
|
u32 ldtbus;
|
|
u32 id;
|
|
int node;
|
|
u16 deviceid;
|
|
u16 vendorid;
|
|
int min_bus;
|
|
int max_bus;
|
|
|
|
static int lbnr[NR_LDT_BUS_NUMBER_REGISTERS] = {
|
|
LDT_BUS_NUMBER_REGISTER_0,
|
|
LDT_BUS_NUMBER_REGISTER_1,
|
|
LDT_BUS_NUMBER_REGISTER_2,
|
|
LDT_BUS_NUMBER_REGISTER_3
|
|
};
|
|
|
|
for (i = 0; i < BUS_NR; i++)
|
|
mp_bus_to_node[i] = -1;
|
|
|
|
if (!early_pci_allowed())
|
|
return -1;
|
|
|
|
slot = 0x18;
|
|
id = read_pci_config(0, slot, 0, PCI_VENDOR_ID);
|
|
|
|
vendorid = id & 0xffff;
|
|
if (vendorid != PCI_VENDOR_ID_AMD)
|
|
goto out;
|
|
|
|
deviceid = (id>>16) & 0xffff;
|
|
if ((deviceid != PCI_DEVICE_ID_K8HTCONFIG) &&
|
|
(deviceid != PCI_DEVICE_ID_K8_10H_HTCONFIG) &&
|
|
(deviceid != PCI_DEVICE_ID_K8_11H_HTCONFIG))
|
|
goto out;
|
|
|
|
for (i = 0; i < NR_LDT_BUS_NUMBER_REGISTERS; i++) {
|
|
ldtbus = read_pci_config(0, slot, 1, lbnr[i]);
|
|
|
|
/* Check if that register is enabled for bus range */
|
|
if ((ldtbus & 7) != 3)
|
|
continue;
|
|
|
|
min_bus = SECONDARY_LDT_BUS_NUMBER(ldtbus);
|
|
max_bus = SUBORDINATE_LDT_BUS_NUMBER(ldtbus);
|
|
node = NODE_ID(ldtbus);
|
|
for (j = min_bus; j <= max_bus; j++)
|
|
mp_bus_to_node[j] = (unsigned char) node;
|
|
}
|
|
|
|
out:
|
|
for (i = 0; i < BUS_NR; i++) {
|
|
node = mp_bus_to_node[i];
|
|
if (node >= 0)
|
|
printk(KERN_DEBUG "bus: %02x to node: %02x\n", i, node);
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
postcore_initcall(early_fill_mp_bus_to_node);
|