Changeset 204 for trunk/kernel/kern/chdev.h

Timestamp:

Jul 17, 2017, 8:42:59 AM (7 years ago)

Author:

alain

Message:

Bug fix in kernel_init
-This line, and those below, will be ignored--

M params.mk
M kernel_config.h
M Makefile
M hdd/virt_hdd.dmg
M tools/bootloader_tsar/boot.c
M kernel/libk/bits.h
M kernel/libk/elf.c
M kernel/libk/xhtab.c
M kernel/libk/elf.h
M kernel/libk/xhtab.h
M kernel/devices/dev_pic.c
M kernel/mm/vmm.c
M kernel/mm/mapper.c
M kernel/mm/mapper.h
M kernel/vfs/devfs.h
M kernel/vfs/vfs.c
M kernel/vfs/vfs.h
M kernel/vfs/devfs.c
M kernel/kern/chdev.h
M kernel/kern/kernel_init.c
M kernel/kern/process.c
M kernel/kern/process.h
M hal/tsar_mips32/core/hal_remote.c
M hal/tsar_mips32/drivers/soclib_pic.c

File:

• trunk/kernel/kern/chdev.h (modified) (4 diffs)

trunk/kernel/kern/chdev.h

@@ -48 +48 @@
  * Therefore a given I/O operation involve generally three clusters:
  * - the client cluster, containing the client thread,
- * - the server cluster, containing the chdev and the client thread,
- * - the I/O cluster containing the physical device.
+ * - the server cluster, containing the chdev and the server thread,
+ * - the I/O cluster, containing the physical device.
  *****************************************************************************************/
 
@@ -66 +66 @@
 
 /******************************************************************************************
- * This define the generic prototypes for the three functions that must be defined
+ * This define the generic prototypes for the two functions that must be defined
  * by all drivers implementing a generic device:
- * - "init"    : device initialisation.
  * - "cmd"     : start an I/O operation.
  * - "isr"     : complete an I/O operation.
- * The "init" function is called by kernel_init() to initialise the hardware device.
- * The "cmd" and "isr" are registered in the generic chdev descriptor by kernel_init(),
+ * The "cmd" and "isr" are registered in the generic chdev descriptor at kernel init,
  * and are called to start and complete an I/O operation.  
 *****************************************************************************************/
@@ -85 +83 @@
  * provide the same set of operations and the same driver API.
  * This enum must be consistent with the enum in files arch_info.h, and arch_class.py.
+ *
+ * WARNING : The ICU device exist in boot_info to specify the base address of the 
+ *           distributed LAPIC controler, but it does not exist as a chdev in the kernel,
+ *           as it is hidden in the driver associated to the PIC device.
  *****************************************************************************************/
  
@@ -99 +101 @@
         DEV_FUNC_TIM   =  8,
         DEV_FUNC_TXT   =  9,
-    DEV_FUNC_ICU   = 10,
+    DEV_FUNC_ICU   = 10,    
     DEV_FUNC_PIC   = 11,