MIPS: Netlogic: Support for multi-chip configuration
Upto 4 Netlogic XLP SoCs can be connected over ICI links to form a
coherent multi-node system. Each SoC has its own set of on-chip
devices including PIC. To support this, add a per SoC stucture and
use it for the PIC and SYS block addresses instead of using global
variables.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4469
Signed-off-by: John Crispin <blogic@openwrt.org>
diff --git a/arch/mips/netlogic/xlr/wakeup.c b/arch/mips/netlogic/xlr/wakeup.c
index 0878924..3ebf741 100644
--- a/arch/mips/netlogic/xlr/wakeup.c
+++ b/arch/mips/netlogic/xlr/wakeup.c
@@ -33,6 +33,7 @@
*/
#include <linux/init.h>
+#include <linux/delay.h>
#include <linux/threads.h>
#include <asm/asm.h>
@@ -50,18 +51,34 @@
int __cpuinit xlr_wakeup_secondary_cpus(void)
{
- unsigned int i, boot_cpu;
+ struct nlm_soc_info *nodep;
+ unsigned int i, j, boot_cpu;
/*
* In case of RMI boot, hit with NMI to get the cores
* from bootloader to linux code.
*/
+ nodep = nlm_get_node(0);
boot_cpu = hard_smp_processor_id();
nlm_set_nmi_handler(nlm_rmiboot_preboot);
for (i = 0; i < NR_CPUS; i++) {
if (i == boot_cpu || !cpumask_test_cpu(i, &nlm_cpumask))
continue;
- nlm_pic_send_ipi(nlm_pic_base, i, 1, 1); /* send NMI */
+ nlm_pic_send_ipi(nodep->picbase, i, 1, 1); /* send NMI */
+ }
+
+ /* Fill up the coremask early */
+ nodep->coremask = 1;
+ for (i = 1; i < NLM_CORES_PER_NODE; i++) {
+ for (j = 1000000; j > 0; j--) {
+ if (nlm_cpu_ready[i * NLM_THREADS_PER_CORE])
+ break;
+ udelay(10);
+ }
+ if (j != 0)
+ nodep->coremask |= (1u << i);
+ else
+ pr_err("Failed to wakeup core %d\n", i);
}
return 0;