MIPS: Netlogic: COP2 save/restore code
Add COP2 register state structure and functions for Netlogic XLP. The
RX and TX buffers and status registers are to be saved. Since the
registers are 64-bit, do the implementation in inline assembly which
works on both 32-bit and 64-bit kernels.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Cc: ddaney.cavm@gmail.com
Patchwork: https://patchwork.linux-mips.org/patch/5413/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 7c637a4..016dc4b 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -190,6 +190,16 @@
[cpu_dcache_line_size() / sizeof(unsigned long)];
};
+#elif defined(CONFIG_CPU_XLP)
+struct nlm_cop2_state {
+ u64 rx[4];
+ u64 tx[4];
+ u32 tx_msg_status;
+ u32 rx_msg_status;
+};
+
+#define COP2_INIT \
+ .cp2 = {{0}, {0}, 0, 0},
#else
#define COP2_INIT
#endif
@@ -237,6 +247,9 @@
struct octeon_cop2_state cp2 __attribute__ ((__aligned__(128)));
struct octeon_cvmseg_state cvmseg __attribute__ ((__aligned__(128)));
#endif
+#ifdef CONFIG_CPU_XLP
+ struct nlm_cop2_state cp2;
+#endif
struct mips_abi *abi;
};