michaelh/zephyr
1
0
Fork 0
Code Releases Activity

linker-defs: add size values for kernel/app memory

Browse source 
These can be computed from start/end values, but such
arithmetic can't be done when populating at build time
struct member values.

Some documentation has been added to explain exactly
what these symbols mean. It is intended for application
RAM to come first, then followed by kernel RAM and then
all unclaimed memory (also considered kernel RAM).

Obsolete _image_ram_all[] removed.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2017-08-01 15:13:44 -07:00 • committed by Anas Nashif
commit 3876f53640
1 changed files with 19 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

25
include/linker/linker-defs.h
View file

@ -147,14 +147,31 @@ GDATA(__data_num_words)
#include <zephyr/types.h>
#ifdef CONFIG_APPLICATION_MEMORY
/* Application memory area bounds */
/* Memory owned by the application. Start and end will be aligned for memory
* management/protection hardware for the target architecture.
* The policy for this memory will be to configure all of it as user thread
* accessible. It consists of all non-kernel globals.
*/
extern char __app_ram_start[];
extern char __app_ram_end[];
extern char __app_ram_size[];
#endif
/* Memory owned by the kernel */
/* Memory owned by the kernel. Start and end will be aligned for memory
* management/protection hardware for the target architecture..
*
* Consists of all kernel-side globals, all kernel objects, all thread stacks,
* and all currently unused RAM. If CONFIG_APPLICATION_MEMORY is not enabled,
* has all globals, not just kernel side.
*
* Except for the stack of the currently executing thread, none of this memory
* is normally accessible to user threads unless specifically granted at
* runtime.
*/
extern char __kernel_ram_start[];
extern char __kernel_ram_end[];
extern char __kernel_ram_size[];
/* Used by _bss_zero or arch-specific implementation */
extern char __bss_start[];
@ -184,10 +201,6 @@ extern char _image_rom_size[];
/* datas, bss, noinit */
extern char _image_ram_start[];
extern char _image_ram_end[];
/* Size of all ram starting from _image_ram_start, including unused RAM past
* _image_ram_end up to the limit of physical RAM.
*/
extern char _image_ram_all[];
extern char _image_text_start[];
extern char _image_text_end[];