ENGR00308060-2 mcc: implementation mcc on imx6sx

- inherited mcc ver 001.002 from vibryd mqx release.
- use mu general int4 as the cpu2cpu int (num is 122 at a9 side).
- add linux wait_event/wake_up mechanism on the buffer management
of share memory
- replace wait_event_interruptible### by wait_event###, so the sleep
task wouldn't be waken up by reboot or CTRL+C signals.
- use the offset address to do the MQX_TO_VIRT and VIRT_TO_MQX
exchanges.
- regmap_bits_updat can't write 1 to clear the bit-set asr, use
regmap_read/write
- fix mu irq clear hang issue
only do the regmap once in the isr register func, and
replace the multi-regmap operations in the kinds of mx6sx mcc related
apis by one global imx_mu_reg.

Signed-off-by: Richard Zhu <r65037@freescale.com>

2 files changed, 96 insertions, 0 deletions

diff --git a/include/linux/mcc_imx6sx.h b/include/linux/mcc_imx6sx.h
new file mode 100644
index 000000000000..86a6de7da31d
--- /dev/null
+++ b/include/linux/mcc_imx6sx.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ * Freescale IMX Linux-specific MCC implementation.
+ * Prototypes for iMX6sx-specific MCC library functions.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Define the phiscal memory address on A9 and shared M4,
+ * This definition should be aligned on both A9 and M4
+ */
+#define MCC_VECTOR_NUMBER_INVALID     (0)
+
+enum {
+        /* FIXME */
+        INT_CPU_TO_CPU_MU_A2M = 122,
+        INT_CPU_TO_CPU_MU_M2A = 90,
+
+        MU_ASR = 0x20,
+        MU_ACR = 0x24,
+};
+
+extern struct regmap *imx_mu_reg;
+
+/* Return core num. A9 0, M4 1 */
+unsigned int _psp_core_num(void);
+
+unsigned int mcc_get_cpu_to_cpu_vector(unsigned int);
+void mcc_clear_cpu_to_cpu_interrupt(unsigned int);
+void mcc_triger_cpu_to_cpu_interrupt(void);
+int imx_mcc_bsp_int_disable(unsigned int vector_number);
+int imx_mcc_bsp_int_enable(unsigned int vector_number);
diff --git a/include/linux/mcc_linux.h b/include/linux/mcc_linux.h
new file mode 100644
index 000000000000..f8591de63e74
--- /dev/null
+++ b/include/linux/mcc_linux.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2014 Freescale Semiconductor, Inc.
+ * Freescale IMX Linux-specific MCC implementation.
+ * Prototypes for Linunx-specific MCC library functions
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __MCC_LINUX__
+#define __MCC_LINUX__
+
+/* Define the kinds of cache macros */
+#define MCC_DCACHE_ENABLE(n)
+#define MCC_DCACHE_DISABLE()
+#define MCC_DCACHE_FLUSH()
+#define MCC_DCACHE_FLUSH_LINE(p)
+#define MCC_DCACHE_FLUSH_MLINES(p, m)
+#define MCC_DCACHE_INVALIDATE()
+#define MCC_DCACHE_INVALIDATE_LINE(p)
+#define MCC_DCACHE_INVALIDATE_MLINES(p, m)
+
+#define _mem_size unsigned int
+
+void * virt_to_mqx(void *);
+void * mqx_to_virt(void *);
+#define VIRT_TO_MQX(x) virt_to_mqx(x)
+#define MQX_TO_VIRT(x) mqx_to_virt(x)
+
+/* Semaphore-related functions */
+int mcc_init_semaphore(unsigned int);
+int mcc_deinit_semaphore(unsigned int);
+int mcc_get_semaphore(void);
+int mcc_release_semaphore(void);
+
+/* CPU-to-CPU interrupt-related functions */
+int mcc_register_cpu_to_cpu_isr(void);
+int mcc_generate_cpu_to_cpu_interrupt(void);
+
+/* Memory management-related functions */
+void mcc_memcpy(void *, void *, unsigned int);
+void _mem_zero(void *, unsigned int);
+
+#endif /* __MCC_LINUX__ */