Author: rminnich
Date: 2008-08-30 05:35:40 +0200 (Sat, 30 Aug 2008)
New Revision: 847
Added:
coreboot-v3/arch/x86/stage1_mtrr.c
coreboot-v3/northbridge/amd/k8/reset_test.c
Modified:
coreboot-v3/arch/x86/Kconfig
coreboot-v3/arch/x86/amd/model_fxx/init_cpus.c
coreboot-v3/include/arch/x86/amd/k8/k8.h
coreboot-v3/include/arch/x86/cpu.h
coreboot-v3/lib/console.c
coreboot-v3/lib/lar.c
coreboot-v3/mainboard/amd/serengeti/Makefile
coreboot-v3/mainboard/amd/serengeti/initram.c
coreboot-v3/mainboard/amd/serengeti/mainboard.h
coreboot-v3/northbridge/amd/k8/raminit.c
Log:
This gets us back to a compiling k8 target.
This code has been tested on dbe62, and builds for qemu as well.
the next step is testing on simnow.
k8.h: add more prototypes and some required inline functions.
cpu.h: same
serengeti: expand defines in mainboard.h, though we need a better
mechanism; continue to fix initram.c, add new support files to Makefile
lib/console.c: include globalvars.h
lib/lar.c: Provide more informative print as the lar is scanned.
k8 north: needed reset_test.c from v2, fixes to raminit.c
arch/x86
Kconfig: new CONFIG variable CBMEMK, meaning coreboot mem k, memory
used for coreboot.
init_cpus.c: functions to start up CPUs
stage1_mtrr.c: bring over early mtrr support from v2.
Signed-off-by: Ronald G. Minnich <rminnich(a)gmail.com>
Acked-by: Ronald G. Minnich <rminnich(a)gmail.com>
Modified: coreboot-v3/arch/x86/Kconfig
===================================================================
--- coreboot-v3/arch/x86/Kconfig 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/arch/x86/Kconfig 2008-08-30 03:35:40 UTC (rev 847)
@@ -171,6 +171,15 @@
help
This option sets the size of the area used for CAR.
+config CBMEMK
+ hex
+ default 0x1000 if CPU_I586
+ default 0x1000 if CPU_AMD_GEODELX
+ default 0x2000 if CPU_AMD_K8
+ help
+ This option sets the top of the memory area, in KiB,
+ used for coreboot.
+
config K8_HT_FREQ_1G_SUPPORT
hex
default 1 if CPU_AMD_K8
Modified: coreboot-v3/arch/x86/amd/model_fxx/init_cpus.c
===================================================================
--- coreboot-v3/arch/x86/amd/model_fxx/init_cpus.c 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/arch/x86/amd/model_fxx/init_cpus.c 2008-08-30 03:35:40 UTC (rev 847)
@@ -321,6 +321,11 @@
unsigned bsp_apicid = 0;
unsigned apicid;
struct node_core_id id;
+ /* this is a bit weird but soft_reset can be defined in many places,
+ * so finding a common
+ * include file to use is a little daunting.
+ */
+ void soft_reset(void);
/*
* MTRR must be set by this point.
Added: coreboot-v3/arch/x86/stage1_mtrr.c
===================================================================
--- coreboot-v3/arch/x86/stage1_mtrr.c (rev 0)
+++ coreboot-v3/arch/x86/stage1_mtrr.c 2008-08-30 03:35:40 UTC (rev 847)
@@ -0,0 +1,141 @@
+/* we will compile this into initram since some basic prototypes differ with same names on v2. Sigh. */
+#include <mainboard.h>
+#include <config.h>
+#include <types.h>
+#include <io.h>
+#include <console.h>
+#include <globalvars.h>
+#include <lar.h>
+#include <string.h>
+#include <tables.h>
+#include <lib.h>
+#include <mc146818rtc.h>
+#include <cpu.h>
+#include <msr.h>
+#include <mtrr.h>
+
+void disable_var_mtrr(unsigned int reg)
+{
+ /* The invalid bit is kept in the mask so we simply
+ * clear the relevent mask register to disable a
+ * range.
+ */
+ struct msr zero;
+ zero.lo = zero.hi = 0;
+ wrmsr(MTRRphysMask_MSR(reg), zero);
+}
+
+void set_var_mtrr(
+ unsigned long reg, unsigned long base, unsigned long size, unsigned long type)
+
+{
+ /* Bit Bit 32-35 of MTRRphysMask should be set to 1 */
+ /* FIXME: It only support 4G less range */
+ struct msr basem, maskm;
+ basem.lo = base | type;
+ basem.hi = 0;
+ wrmsr(MTRRphysBase_MSR(reg), basem);
+ maskm.lo = ~(size - 1) | 0x800;
+ maskm.hi = (1<<(CPU_ADDR_BITS-32))-1;
+ wrmsr(MTRRphysMask_MSR(reg), maskm);
+}
+
+void set_var_mtrr_x(
+ unsigned long reg, u32 base_lo, u32 base_hi, u32 size_lo, u32 size_hi, unsigned long type)
+
+{
+ /* Bit Bit 32-35 of MTRRphysMask should be set to 1 */
+ struct msr basem, maskm;
+ basem.lo = (base_lo & 0xfffff000) | type;
+ basem.hi = base_hi & ((1<<(CPU_ADDR_BITS-32))-1);
+ wrmsr(MTRRphysBase_MSR(reg), basem);
+ maskm.hi = (1<<(CPU_ADDR_BITS-32))-1;
+ if(size_lo) {
+ maskm.lo = ~(size_lo - 1) | 0x800;
+ } else {
+ maskm.lo = 0x800;
+ maskm.hi &= ~(size_hi - 1);
+ }
+ wrmsr(MTRRphysMask_MSR(reg), maskm);
+}
+
+void cache_cbmem(int type)
+{
+ /* Enable caching for 0 - 1MB using variable mtrr */
+ disable_cache();
+ set_var_mtrr(0, 0x00000000, COREBOOT_MEM_TOPK << 10, type);
+ enable_cache();
+}
+
+/* the fixed and variable MTTRs are power-up with random values,
+ * clear them to MTRR_TYPE_UNCACHEABLE for safty.
+ */
+void do_early_mtrr_init(const unsigned long *mtrr_msrs)
+{
+ /* Precondition:
+ * The cache is not enabled in cr0 nor in MTRRdefType_MSR
+ * entry32.inc ensures the cache is not enabled in cr0
+ */
+ struct msr msr;
+ const unsigned long *msr_addr;
+
+ /* Inialize all of the relevant msrs to 0 */
+ msr.lo = 0;
+ msr.hi = 0;
+ unsigned long msr_nr;
+ for(msr_addr = mtrr_msrs; (msr_nr = *msr_addr); msr_addr++) {
+ wrmsr(msr_nr, msr);
+ }
+
+#warning fix the XIP bits in stage1_mtrr.c that enable write through caching so we can do execute in place on the flash rom.
+#if 0
+#if defined(XIP_ROM_SIZE)
+ /* enable write through caching so we can do execute in place
+ * on the flash rom.
+ */
+ set_var_mtrr(1, XIP_ROM_BASE, XIP_ROM_SIZE, MTRR_TYPE_WRBACK);
+#endif
+#endif
+
+ /* Set the default memory type and enable fixed and variable MTRRs
+ */
+ /* Enable Variable MTRRs */
+ msr.hi = 0x00000000;
+ msr.lo = 0x00000800;
+ wrmsr(MTRRdefType_MSR, msr);
+
+}
+
+void early_mtrr_init(void)
+{
+ static const unsigned long mtrr_msrs[] = {
+ /* fixed mtrr */
+ 0x250, 0x258, 0x259,
+ 0x268, 0x269, 0x26A,
+ 0x26B, 0x26C, 0x26D,
+ 0x26E, 0x26F,
+ /* var mtrr */
+ 0x200, 0x201, 0x202, 0x203,
+ 0x204, 0x205, 0x206, 0x207,
+ 0x208, 0x209, 0x20A, 0x20B,
+ 0x20C, 0x20D, 0x20E, 0x20F,
+ /* NULL end of table */
+ 0
+ };
+ disable_cache();
+ do_early_mtrr_init(mtrr_msrs);
+ enable_cache();
+}
+
+int early_mtrr_init_detected(void)
+{
+ struct msr msr;
+ /* See if MTRR's are enabled.
+ * a #RESET disables them while an #INIT
+ * preserves their state. This works
+ * on both Intel and AMD cpus, at least
+ * according to the documentation.
+ */
+ msr = rdmsr(MTRRdefType_MSR);
+ return msr.lo & 0x00000800;
+}
Modified: coreboot-v3/include/arch/x86/amd/k8/k8.h
===================================================================
--- coreboot-v3/include/arch/x86/amd/k8/k8.h 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/include/arch/x86/amd/k8/k8.h 2008-08-30 03:35:40 UTC (rev 847)
@@ -690,6 +690,76 @@
void enable_fid_change(void);
void init_fidvid_bsp(unsigned bsp_apicid);
+/* k8/northbridge.c */
+void sdram_initialize(int controllers, const struct mem_controller *ctrl, struct sys_info *sysinfo);
+/* k8/reset_test.c */
+void distinguish_cpu_resets(unsigned nodeid);
+
+/* These are functions that MUST be inlined as we can not use a stack -- CAR or real ram */
+/* by yhlu 6.2005 */
+/* be warned, this file will be used other cores and core 0 / node 0 */
+static inline __attribute__((always_inline)) void disable_cache_as_ram(void)
+{
+
+ __asm__ volatile (
+
+ /* We don't need cache as ram for now on */
+ /* disable cache */
+ "movl %cr0, %eax\n\t"
+ "orl $(0x1<<30),%eax\n\t"
+ "movl %eax, %cr0\n\t"
+
+ /* clear sth */
+ "movl $0x269, %ecx\n\t" /* fix4k_c8000*/
+ "xorl %edx, %edx\n\t"
+ "xorl %eax, %eax\n\t"
+ "wrmsr\n\t"
+#if CONFIG_CARSIZE > 0x8000
+ "movl $0x268, %ecx\n\t" /* fix4k_c0000*/
+ "wrmsr\n\t"
+#endif
+
+ /* disable fixed mtrr from now on, it will be enabled by coreboot_ram again*/
+ "movl $0xC0010010, %ecx\n\t"
+// "movl $SYSCFG_MSR, %ecx\n\t"
+ "rdmsr\n\t"
+ "andl $(~(3<<18)), %eax\n\t"
+// "andl $(~(SYSCFG_MSR_MtrrFixDramModEn | SYSCFG_MSR_MtrrFixDramEn)), %eax\n\t"
+ "wrmsr\n\t"
+
+ /* Set the default memory type and disable fixed and enable variable MTRRs */
+ "movl $0x2ff, %ecx\n\t"
+// "movl $MTRRdefType_MSR, %ecx\n\t"
+ "xorl %edx, %edx\n\t"
+ /* Enable Variable and Disable Fixed MTRRs */
+ "movl $0x00000800, %eax\n\t"
+ "wrmsr\n\t"
+
+ /* enable cache */
+ "movl %cr0, %eax\n\t"
+ "andl $0x9fffffff,%eax\n\t"
+ "movl %eax, %cr0\n\t"
+
+ );
+}
+
+static void disable_cache_as_ram_bsp(void)
+{
+ __asm__ volatile (
+// "pushl %eax\n\t"
+ "pushl %edx\n\t"
+ "pushl %ecx\n\t"
+ );
+
+ disable_cache_as_ram();
+ __asm__ volatile (
+ "popl %ecx\n\t"
+ "popl %edx\n\t"
+// "popl %eax\n\t"
+ );
+}
+
+
#endif /* ! ASSEMBLY */
#endif /* AMD_K8_H */
Modified: coreboot-v3/include/arch/x86/cpu.h
===================================================================
--- coreboot-v3/include/arch/x86/cpu.h 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/include/arch/x86/cpu.h 2008-08-30 03:35:40 UTC (rev 847)
@@ -21,10 +21,11 @@
#ifndef ARCH_X86_CPU_H
#define ARCH_X86_CPU_H
-
+#include <config.h>
#include <types.h>
#include <device/device.h>
#include <shared.h>
+#include <mtrr.h>
#define X86_VENDOR_INTEL 0
#define X86_VENDOR_CYRIX 1
@@ -81,6 +82,13 @@
u8 x86_mask;
};
+/* prototypes for functions that may or may not be compiled in depending on cpu type */
+void set_var_mtrr_x(
+ unsigned long reg, u32 base_lo, u32 base_hi, u32 size_lo, u32 size_hi, unsigned long type);
+void set_var_mtrr(
+ unsigned long reg, unsigned long base, unsigned long size, unsigned long type);
+
+
/**
* Generic CPUID function.
*
@@ -201,6 +209,48 @@
__asm__ __volatile__("hlt" : : : "memory");
}
+/**
+ * Optimized generic x86 assembly for clearing memory
+ * @param addr address
+ * @param size Size in bytes to clear
+ */
+static inline void clear_memory(void *addr, unsigned long size)
+{
+ asm volatile(
+ "cld \n\t"
+ "rep; stosl\n\t"
+ : /* No outputs */
+ : "a" (0), "D" (addr), "c" (size>>2)
+ );
+
+}
+
+/* in v2, these were specialized to the k8 for no apparent reason.
+ * Also, clear_init_ram was set to noinline,
+ * for reasons I do not understand (but may be important; see the comment */
+/* by yhlu 6.2005 */
+/* be warned, this file will be used core 0/node 0 only */
+
+//static void __attribute__((noinline)) clear_init_ram(void)
+static inline void clear_init_ram(void)
+{
+ // ???
+ // gcc 3.4.5 will inline the copy_and_run and clear_init_ram in post_cache_as_ram
+ // will reuse %edi as 0 from clear_memory for copy_and_run part, actually it is increased already
+ // so noline clear_init_ram
+ // ???
+ clear_memory(0, ((CONFIG_CBMEMK<<10) - CONFIG_CARSIZE));
+
+}
+
+/* be warned, this file will be used by core other than core 0/node 0 or core0/node0 when cpu_reset*/
+static void set_init_ram_access(void)
+{
+ set_var_mtrr(0, 0x00000000, CONFIG_CBMEMK << 10, MTRR_TYPE_WRBACK);
+}
+
+
+
void * bottom_of_stack(void);
EXPORT_SYMBOL(bottom_of_stack);
struct global_vars * global_vars(void);
@@ -260,4 +310,5 @@
void setup_resource_map(const struct rmap *rm, u32 max);
EXPORT_SYMBOL(setup_resource_map);
+
#endif /* ARCH_X86_CPU_H */
Modified: coreboot-v3/lib/console.c
===================================================================
--- coreboot-v3/lib/console.c 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/lib/console.c 2008-08-30 03:35:40 UTC (rev 847)
@@ -1,6 +1,7 @@
#include <types.h>
#include <cpu.h>
#include <console.h>
+#include <globalvars.h>
#include <uart8250.h>
#include <stdarg.h>
#include <string.h>
Modified: coreboot-v3/lib/lar.c
===================================================================
--- coreboot-v3/lib/lar.c 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/lib/lar.c 2008-08-30 03:35:40 UTC (rev 847)
@@ -120,7 +120,8 @@
header = (struct lar_header *)walk;
fullname = walk + sizeof(struct lar_header);
- printk(BIOS_SPEW, "LAR: seen member %s\n", fullname);
+ printk(BIOS_SPEW, "LAR: %s@%p, size %d\n", fullname,
+ header, ntohl(header->len));
// FIXME: check checksum
if (strcmp(fullname, filename) == 0) {
Modified: coreboot-v3/mainboard/amd/serengeti/Makefile
===================================================================
--- coreboot-v3/mainboard/amd/serengeti/Makefile 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/mainboard/amd/serengeti/Makefile 2008-08-30 03:35:40 UTC (rev 847)
@@ -33,7 +33,9 @@
INITRAM_SRC= $(src)/mainboard/$(MAINBOARDDIR)/initram.c \
$(src)/northbridge/amd/k8/raminit.c \
$(src)/northbridge/amd/k8/dqs.c \
+ $(src)/northbridge/amd/k8/reset_test.c \
$(src)/arch/x86/pci_ops_conf1.c \
+ $(src)/arch/x86/stage1_mtrr.c \
$(src)/southbridge/amd/amd8111/stage1_smbus.c \
$(src)/arch/x86/amd/model_fxx/init_cpus.c \
$(src)/arch/x86/amd/model_fxx/dualcore.c \
Modified: coreboot-v3/mainboard/amd/serengeti/initram.c
===================================================================
--- coreboot-v3/mainboard/amd/serengeti/initram.c 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/mainboard/amd/serengeti/initram.c 2008-08-30 03:35:40 UTC (rev 847)
@@ -22,6 +22,7 @@
#define _MAINOBJECT
#include <mainboard.h>
+#include <config.h>
#include <types.h>
#include <lib.h>
#include <console.h>
Modified: coreboot-v3/mainboard/amd/serengeti/mainboard.h
===================================================================
--- coreboot-v3/mainboard/amd/serengeti/mainboard.h 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/mainboard/amd/serengeti/mainboard.h 2008-08-30 03:35:40 UTC (rev 847)
@@ -33,7 +33,6 @@
#define SB_HT_CHAIN_UNITID_OFFSET_ONLY 1
#define ENABLE_APIC_EXT_ID 0
#define LIFT_BSP_APIC_ID 1
-
#warning clean up confusion on FIDVID. v2 was inconsistent.
/* In v2 there is confusion on the settings of these.
* The serengeti config sets it to zero.
@@ -44,3 +43,7 @@
/* MSR FIDVID_CTL and FIDVID_STATUS are shared by cores,
* so may don't need to do twice */
#define K8_SET_FIDVID_CORE0_ONLY 1
+
+/* architecture stuff which ought to be set "somewhere" "SOMEHOW" */
+/* preferably by asking the CPU, not be a DEFINE! */
+#define CPU_ADDR_BITS 40
Modified: coreboot-v3/northbridge/amd/k8/raminit.c
===================================================================
--- coreboot-v3/northbridge/amd/k8/raminit.c 2008-08-29 21:18:09 UTC (rev 846)
+++ coreboot-v3/northbridge/amd/k8/raminit.c 2008-08-30 03:35:40 UTC (rev 847)
@@ -2972,3 +2972,40 @@
}
}
}
+
+/**
+ * initialize sdram. There was a "generic" function in v2 that was not really that useful.
+ * we break it out by northbridge now to accomodate the different peculiarities of
+ * different chipsets.
+ *@param controllers Number of controllers
+ *@param ctlr array of memory controllers
+ *@param sysinfo pointer to sysinfo struct.
+ */
+void sdram_initialize(int controllers, const struct mem_controller *ctrl, struct sys_info *sysinfo)
+{
+ int i;
+ /* Set the registers we can set once to reasonable values */
+ for(i = 0; i < controllers; i++) {
+ printk(BIOS_DEBUG, "Ram1.%d, ",i);
+
+ sdram_set_registers(ctrl + i , sysinfo);
+ }
+
+ /* Now setup those things we can auto detect */
+ for(i = 0; i < controllers; i++) {
+ printk(BIOS_DEBUG, "Ram2.%d, ",i);
+ sdram_set_spd_registers(ctrl + i , sysinfo);
+
+ }
+
+ /* Now that everything is setup enable the SDRAM.
+ * Some chipsets do the work for us while on others
+ * we need to it by hand.
+ */
+ printk(BIOS_DEBUG, "Ram3\n");
+
+ sdram_enable(controllers, ctrl, sysinfo);
+
+ printk(BIOS_DEBUG, "Ram4\n");
+
+}
Added: coreboot-v3/northbridge/amd/k8/reset_test.c
===================================================================
--- coreboot-v3/northbridge/amd/k8/reset_test.c (rev 0)
+++ coreboot-v3/northbridge/amd/k8/reset_test.c 2008-08-30 03:35:40 UTC (rev 847)
@@ -0,0 +1,126 @@
+/*
+ * K8 northbridge
+ * This file is part of the coreboot project.
+ * Copyright (C) 2004-2005 Linux Networx
+ * (Written by Eric Biederman <ebiederman(a)lnxi.com> and Jason Schildt for Linux Networx)
+ * Copyright (C) 2005-7 YingHai Lu
+ * Copyright (C) 2005 Ollie Lo
+ * Copyright (C) 2005-2007 Stefan Reinauer <stepan(a)openbios.org>
+ * Copyright (C) 2008 Ronald G. Minnich <rminnich(a)gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
+ */
+/* This should be done by Eric
+ 2004.12 yhlu add dual core support
+ 2005.01 yhlu add support move apic before pci_domain in MB Config.lb
+ 2005.02 yhlu add e0 memory hole support
+ 2005.11 yhlu add put sb ht chain on bus 0
+*/
+
+#include <mainboard.h>
+#include <console.h>
+#include <lib.h>
+#include <string.h>
+#include <mtrr.h>
+#include <macros.h>
+#include <spd.h>
+#include <cpu.h>
+#include <msr.h>
+#include <amd/k8/k8.h>
+#include <amd/k8/sysconf.h>
+#include <device/pci.h>
+#include <device/hypertransport_def.h>
+#include <device/hypertransport.h>
+#include <mc146818rtc.h>
+#include <lib.h>
+#include <lapic.h>
+
+int cpu_init_detected(unsigned nodeid)
+{
+ unsigned long htic;
+ u32 dev;
+
+ dev = PCI_BDF(0, 0x18 + nodeid, 0);
+ htic = pci_conf1_read_config32(dev, HT_INIT_CONTROL);
+
+ return !!(htic & HTIC_INIT_Detect);
+}
+
+int bios_reset_detected(void)
+{
+ unsigned long htic;
+ htic = pci_conf1_read_config32(PCI_BDF(0, 0x18, 0), HT_INIT_CONTROL);
+
+ return (htic & HTIC_ColdR_Detect) && !(htic & HTIC_BIOSR_Detect);
+}
+
+int cold_reset_detected(void)
+{
+ unsigned long htic;
+ htic = pci_conf1_read_config32(PCI_BDF(0, 0x18, 0), HT_INIT_CONTROL);
+
+ return !(htic & HTIC_ColdR_Detect);
+}
+
+void distinguish_cpu_resets(unsigned nodeid)
+{
+ u32 htic;
+ u32 device;
+ device = PCI_BDF(0, 0x18 + nodeid, 0);
+ htic = pci_conf1_read_config32(device, HT_INIT_CONTROL);
+ htic |= HTIC_ColdR_Detect | HTIC_BIOSR_Detect | HTIC_INIT_Detect;
+ pci_conf1_write_config32(device, HT_INIT_CONTROL, htic);
+}
+
+void set_bios_reset(void)
+{
+ unsigned long htic;
+ htic = pci_conf1_read_config32(PCI_BDF(0, 0x18, 0), HT_INIT_CONTROL);
+ htic &= ~HTIC_BIOSR_Detect;
+ pci_conf1_write_config32(PCI_BDF(0, 0x18, 0), HT_INIT_CONTROL, htic);
+}
+
+unsigned node_link_to_bus(unsigned node, unsigned link)
+{
+ unsigned reg;
+
+ for(reg = 0xE0; reg < 0xF0; reg += 0x04) {
+ unsigned config_map;
+ config_map = pci_conf1_read_config32(PCI_BDF(0, 0x18, 1), reg);
+ if ((config_map & 3) != 3) {
+ continue;
+ }
+ if ((((config_map >> 4) & 7) == node) &&
+ (((config_map >> 8) & 3) == link))
+ {
+ return (config_map >> 16) & 0xff;
+ }
+ }
+ return 0;
+}
+
+unsigned get_sblk(void)
+{
+ u32 reg;
+ /* read PCI_BDF(0,0x18,0) 0x64 bit [8:9] to find out SbLink m */
+ reg = pci_conf1_read_config32(PCI_BDF(0, 0x18, 0), 0x64);
+ return ((reg>>8) & 3) ;
+}
+
+unsigned get_sbbusn(unsigned sblk)
+{
+ return node_link_to_bus(0, sblk);
+}
+
+
