Add STM32 CCM heep procfs

2 files changed, 324 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/stm32/Make.defs b/nuttx/arch/arm/src/stm32/Make.defs
index 4b15941a3..77d6b4c7e 100644
--- a/nuttx/arch/arm/src/stm32/Make.defs
+++ b/nuttx/arch/arm/src/stm32/Make.defs
@@ -96,6 +96,7 @@ CHIP_CSRCS  = stm32_allocateheap.c stm32_start.c stm32_rcc.c stm32_lse.c
 CHIP_CSRCS += stm32_lsi.c stm32_gpio.c stm32_exti_gpio.c stm32_flash.c stm32_irq.c
 CHIP_CSRCS += stm32_timerisr.c stm32_dma.c stm32_lowputc.c stm32_serial.c
 CHIP_CSRCS += stm32_spi.c stm32_sdio.c stm32_tim.c stm32_waste.c stm32_ccm.c
+CHIP_CSRCS += stm32_procfs_ccm.c
 
 ifeq ($(CONFIG_ARMV7M_CMNVECTOR),y)
 CHIP_ASRCS += stm32_vectors.S
diff --git a/nuttx/arch/arm/src/stm32/stm32_procfs_ccm.c b/nuttx/arch/arm/src/stm32/stm32_procfs_ccm.c
new file mode 100644
index 000000000..68666f466
--- /dev/null
+++ b/nuttx/arch/arm/src/stm32/stm32_procfs_ccm.c
@@ -0,0 +1,323 @@
+/****************************************************************************
+ * arch/arm/src/stm32/stm32_procfs_ccm.c
+ *
+ *   Copyright (C) 2014 Pelle Windestam. All rights reserved.
+ *   Author: Pelle Windestam (pelle@windestam.se)
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <sys/statfs.h>
+#include <sys/stat.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/arch.h>
+#include <nuttx/sched.h>
+#include <nuttx/kmalloc.h>
+#include <nuttx/fs/fs.h>
+#include <nuttx/fs/procfs.h>
+#include <nuttx/fs/dirent.h>
+
+#include <arch/irq.h>
+
+#include "stm32_ccm.h"
+
+#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FS_PROCFS)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+#define CCM_LINELEN     64
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+/* This enumeration identifies all of the thread attributes that can be
+ * accessed via the procfs file system.
+ */
+
+/* This structure describes one open "file" */
+
+struct ccm_file_s
+{
+  struct procfs_file_s  base;        /* Base open file structure */
+  unsigned int linesize;             /* Number of valid characters in line[] */
+  char line[CCM_LINELEN];        /* Pre-allocated buffer for formatted lines */
+
+  /* Add context specific data types for managing an open file here */
+};
+
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+/* File system methods */
+
+static int     ccm_open(FAR struct file *filep, FAR const char *relpath,
+                        int oflags, mode_t mode);
+static int     ccm_close(FAR struct file *filep);
+static ssize_t ccm_read(FAR struct file *filep, FAR char *buffer,
+                        size_t buflen);
+
+static int     ccm_dup(FAR const struct file *oldp,
+                       FAR struct file *newp);
+
+static int     ccm_stat(FAR const char *relpath, FAR struct stat *buf);
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/* See include/nutts/fs/procfs.h
+ * We use the old-fashioned kind of initializers so that this will compile
+ * with any compiler.
+ */
+
+const struct procfs_operations ccm_procfsoperations =
+{
+  ccm_open,       /* open */
+  ccm_close,      /* close */
+  ccm_read,       /* read */
+  NULL,            /* write */
+  ccm_dup,        /* dup */
+  NULL,            /* opendir */
+  NULL,            /* closedir */
+  NULL,            /* readdir */
+  NULL,            /* rewinddir */
+  ccm_stat        /* stat */
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: ccm_open
+ ****************************************************************************/
+
+static int ccm_open(FAR struct file *filep, FAR const char *relpath,
+                      int oflags, mode_t mode)
+{
+  FAR struct ccm_file_s *priv;
+
+  fvdbg("Open '%s'\n", relpath);
+
+  /* PROCFS is read-only.  Any attempt to open with any kind of write
+   * access is not permitted.
+   *
+   * REVISIT:  Write-able proc files could be quite useful.
+   */
+
+  if ((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0)
+    {
+      fdbg("ERROR: Only O_RDONLY supported\n");
+      return -EACCES;
+    }
+
+  /* "cpuload" is the only acceptable value for the relpath */
+
+  if (strcmp(relpath, "ccm") != 0)
+    {
+      fdbg("ERROR: relpath is '%s'\n", relpath);
+      return -ENOENT;
+    }
+
+  /* Allocate a container to hold the task and attribute selection */
+
+  priv = (FAR struct ccm_file_s *)kzalloc(sizeof(struct ccm_file_s));
+  if (!priv)
+    {
+      fdbg("ERROR: Failed to allocate file attributes\n");
+      return -ENOMEM;
+    }
+
+  /* Save the index as the open-specific state in filep->f_priv */
+
+  filep->f_priv = (FAR void *)priv;
+  return OK;
+}
+
+/****************************************************************************
+ * Name: ccm_close
+ ****************************************************************************/
+
+static int ccm_close(FAR struct file *filep)
+{
+  FAR struct ccm_file_s *priv;
+
+  /* Recover our private data from the struct file instance */
+
+  priv = (FAR struct ccm_file_s *)filep->f_priv;
+  DEBUGASSERT(priv);
+
+  /* Release the file attributes structure */
+
+  kfree(priv);
+  filep->f_priv = NULL;
+  return OK;
+}
+
+/****************************************************************************
+ * Name: ccm_read
+ ****************************************************************************/
+
+static ssize_t ccm_read(FAR struct file *filep, FAR char *buffer,
+                           size_t buflen)
+{
+  FAR struct ccm_file_s *priv;
+  ssize_t ret = 0;
+  size_t linesize;
+  size_t copysize;
+  size_t remaining;
+  size_t totalsize;
+  struct mallinfo mem;
+  off_t offset = filep->f_pos;
+
+  fvdbg("buffer=%p buflen=%d\n", buffer, (int)buflen);
+
+  /* Recover our private data from the struct file instance */
+
+  priv = (FAR struct ccm_file_s *)filep->f_priv;
+  DEBUGASSERT(priv);
+
+
+  mm_mallinfo(&g_ccm_heap, &mem);
+  
+  remaining = buflen;
+  totalsize = 0;
+
+  linesize = snprintf(priv->line,
+                      CCM_LINELEN,
+                      "             total       used       free    largest\n");
+  copysize = procfs_memcpy(priv->line, linesize, buffer, remaining, &offset);
+  totalsize += copysize;
+  buffer    += copysize;
+  remaining -= copysize;
+
+  if (totalsize >= buflen)
+    {
+      return totalsize;
+    }
+
+  linesize = snprintf(priv->line,
+                      CCM_LINELEN,
+                      "Mem:   %11d%11d%11d%11d\n",
+                      mem.arena,
+                      mem.uordblks,
+                      mem.fordblks,
+                      mem.mxordblk);
+  copysize = procfs_memcpy(priv->line, linesize, buffer, remaining, &offset);
+  totalsize += copysize;
+
+  /* Update the file offset */
+
+  if (totalsize > 0)
+    {
+      filep->f_pos += totalsize;
+    }
+
+  return totalsize;
+}
+
+/****************************************************************************
+ * Name: ccm_dup
+ *
+ * Description:
+ *   Duplicate open file data in the new file structure.
+ *
+ ****************************************************************************/
+
+static int ccm_dup(FAR const struct file *oldp, FAR struct file *newp)
+{
+  FAR struct ccm_file_s *oldpriv;
+  FAR struct ccm_file_s *newpriv;
+
+  fvdbg("Dup %p->%p\n", oldp, newp);
+
+  /* Recover our private data from the old struct file instance */
+
+  oldpriv = (FAR struct ccm_file_s *)oldp->f_priv;
+  DEBUGASSERT(oldpriv);
+
+  /* Allocate a new container to hold the task and attribute selection */
+
+  newpriv = (FAR struct ccm_file_s *)kzalloc(sizeof(struct ccm_file_s));
+  if (!newpriv)
+    {
+      fdbg("ERROR: Failed to allocate file attributes\n");
+      return -ENOMEM;
+    }
+
+  /* The copy the file attribtes from the old attributes to the new */
+
+  memcpy(newpriv, oldpriv, sizeof(struct ccm_file_s));
+
+  /* Save the new attributes in the new file structure */
+
+  newp->f_priv = (FAR void *)newpriv;
+  return OK;
+}
+
+static int ccm_stat(const char *relpath, struct stat *buf)
+{
+  if (strcmp(relpath, "ccm") != 0)
+    {
+      fdbg("ERROR: relpath is '%s'\n", relpath);
+      return -ENOENT;
+    }
+
+  buf->st_mode    = S_IFREG|S_IROTH|S_IRGRP|S_IRUSR;
+  buf->st_size    = 0;
+  buf->st_blksize = 0;
+  buf->st_blocks  = 0;
+
+  return OK;
+}
+
+#endif /* !CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_PROCFS */