[PATCH 2/5] MIPS: CM: export the symbols needed to access the GCRs from a module

[Vladimir Kondratiev]

Allow modules to use the GCR and CPC accessors from asm/mips-cm.h and
asm/mips-cpc.h:

- mips_gcr_base and mips_cpc_base are the mapped register blocks;
- the CPS_ACCESSOR macros consult mips_cm_is64 on every 64-bit register
  access;
- mips_cm_lock_other() / mips_cm_unlock_other() are the only way to
  reach the registers of another cluster through the redirect block.

This is a prerequisite for building the CM3 PMU driver as a module.

Signed-off-by: Vladimir Kondratiev <vladimir.kondratiev@xxxxxxxxxxxx>
---
 arch/mips/kernel/mips-cm.c  | 5 +++++
 arch/mips/kernel/mips-cpc.c | 2 ++
 2 files changed, 7 insertions(+)

diff --git a/arch/mips/kernel/mips-cm.c b/arch/mips/kernel/mips-cm.c
index 7c9c5dc38823..afe0664e4dcf 100644
--- a/arch/mips/kernel/mips-cm.c
+++ b/arch/mips/kernel/mips-cm.c
@@ -5,6 +5,7 @@
  */
 
 #include <linux/errno.h>
+#include <linux/export.h>
 #include <linux/of.h>
 #include <linux/percpu.h>
 #include <linux/spinlock.h>
@@ -14,8 +15,10 @@
 #include <asm/mipsregs.h>
 
 void __iomem *mips_gcr_base;
+EXPORT_SYMBOL_GPL(mips_gcr_base);
 void __iomem *mips_cm_l2sync_base;
 int mips_cm_is64;
+EXPORT_SYMBOL_GPL(mips_cm_is64);
 bool mips_cm_is_l2_hci_broken;
 
 static char *cm2_tr[8] = {
@@ -373,6 +376,7 @@ void mips_cm_lock_other(unsigned int cluster, unsigned int core,
 	 */
 	mb();
 }
+EXPORT_SYMBOL_GPL(mips_cm_lock_other);
 
 void mips_cm_unlock_other(void)
 {
@@ -389,6 +393,7 @@ void mips_cm_unlock_other(void)
 
 	preempt_enable();
 }
+EXPORT_SYMBOL_GPL(mips_cm_unlock_other);
 
 void mips_cm_error_report(void)
 {
diff --git a/arch/mips/kernel/mips-cpc.c b/arch/mips/kernel/mips-cpc.c
index 3e386f7e1545..4a8bd56bc2e8 100644
--- a/arch/mips/kernel/mips-cpc.c
+++ b/arch/mips/kernel/mips-cpc.c
@@ -6,6 +6,7 @@
 
 #include <linux/bitfield.h>
 #include <linux/errno.h>
+#include <linux/export.h>
 #include <linux/percpu.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
@@ -14,6 +15,7 @@
 #include <asm/mips-cps.h>
 
 void __iomem *mips_cpc_base;
+EXPORT_SYMBOL_GPL(mips_cpc_base);
 
 static DEFINE_PER_CPU_ALIGNED(spinlock_t, cpc_core_lock);
 

-- 
2.43.0