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linker: arm: add stm32 ccm sections

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The STM32 has special Core Coupled Memory, ccm for short, that can
only be accessed through the CPU and can not be use for DMA.

The following 3 sections have been added.
- ccm_bss for zero initialized data
- ccm_data for initialized data
- ccm_noinit for uninitialized data

Signed-off-by: Erwin Rol <erwin@erwinrol.com>
This commit is contained in:
Erwin Rol 2017-10-05 01:20:21 +02:00 • committed by Kumar Gala
commit 581446d8cd
4 changed files with 63 additions and 0 deletions
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13
include/linker/linker-defs.h
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@ -235,6 +235,19 @@ extern char _vector_end[];
/* end address of image, used by newlib for the heap */
extern char _end[];
#ifdef CONFIG_CCM_BASE_ADDRESS
extern char __ccm_data_rom_start[];
extern char __ccm_start[];
extern char __ccm_data_start[];
extern char __ccm_data_end[];
extern char __ccm_bss_start[];
extern char __ccm_bss_end[];
extern char __ccm_noinit_start[];
extern char __ccm_noinit_end[];
extern char __ccm_end[];
#endif /* CONFIG_CCM_BASE_ADDRESS */
#endif /* ! _ASMLANGUAGE */
#endif /* _LINKERDEFS_H */