powerpc/powernv: Initialise nest mmu
POWER9 contains an off core mmu called the nest mmu (NMMU). This is
used by other hardware units on the chip to translate virtual
addresses into real addresses. The unit attempting an address
translation provides the majority of the context required for the
translation request except for the base address of the partition table
(ie. the PTCR) which needs to be programmed into the NMMU.
This patch adds a call to OPAL to set the PTCR for the nest mmu in
opal_init().
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index 0e2e57b..a0aa285 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -167,7 +167,8 @@
#define OPAL_INT_EOI 124
#define OPAL_INT_SET_MFRR 125
#define OPAL_PCI_TCE_KILL 126
-#define OPAL_LAST 126
+#define OPAL_NMMU_SET_PTCR 127
+#define OPAL_LAST 127
/* Device tree flags */
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 5c7db0f..08ddea9 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -232,6 +232,7 @@
int64_t opal_rm_pci_tce_kill(uint64_t phb_id, uint32_t kill_type,
uint32_t pe_num, uint32_t tce_size,
uint64_t dma_addr, uint32_t npages);
+int64_t opal_nmmu_set_ptcr(uint64_t chip_id, uint64_t ptcr);
/* Internal functions */
extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
diff --git a/arch/powerpc/include/asm/powernv.h b/arch/powerpc/include/asm/powernv.h
new file mode 100644
index 0000000..0e9c240
--- /dev/null
+++ b/arch/powerpc/include/asm/powernv.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2017 IBM Corp.
+ *
+ * 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; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_POWERNV_H
+#define _ASM_POWERNV_H
+
+#ifdef CONFIG_PPC_POWERNV
+extern void powernv_set_nmmu_ptcr(unsigned long ptcr);
+#else
+static inline void powernv_set_nmmu_ptcr(unsigned long ptcr) { }
+#endif
+
+#endif /* _ASM_POWERNV_H */