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arch: riscv: common: linker: Add itcm & dtcm sections

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The current riscv linker script don't have sections for
Data & Instruction Tightly Coupled Memory.  Add itcm and
dtcm sections to make it available.  All sections were
8 byte align to keep compatible with rv64 SoCs.

Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>
This commit is contained in:
Gerson Fernando Budke 2021-08-02 23:21:59 -03:00 • committed by Christopher Friedt
commit a54fa4eb8e
1 changed files with 58 additions and 0 deletions
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58
include/arch/riscv/common/linker.ld
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@ -16,6 +16,7 @@
#include <autoconf.h>
#include <linker/sections.h>
#include <linker/devicetree_regions.h>
#include <linker/linker-defs.h>
#include <linker/linker-tool.h>
@ -79,6 +80,11 @@ MEMORY
ROM (rx) : ORIGIN = ROM_BASE, LENGTH = ROM_SIZE
#endif
RAM (rwx) : ORIGIN = RAM_BASE, LENGTH = RAM_SIZE
/* Data & Instruction Tightly Coupled Memory */
LINKER_DT_REGION_FROM_NODE(ITCM, rw, DT_CHOSEN(zephyr_itcm))
LINKER_DT_REGION_FROM_NODE(DTCM, rw, DT_CHOSEN(zephyr_dtcm))
/* Used by and documented in include/linker/intlist.ld */
IDT_LIST (wx) : ORIGIN = 0xFFFFF7FF, LENGTH = 2K
}
@ -268,6 +274,58 @@ SECTIONS
__kernel_ram_end = .;
__kernel_ram_size = __kernel_ram_end - __kernel_ram_start;
#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_itcm), okay)
GROUP_START(ITCM)
SECTION_PROLOGUE(_ITCM_SECTION_NAME,,SUBALIGN(8))
{
__itcm_start = .;
*(.itcm)
*(".itcm.*")
__itcm_end = .;
} GROUP_LINK_IN(ITCM AT> ROMABLE_REGION)
__itcm_size = __itcm_end - __itcm_start;
__itcm_rom_start = LOADADDR(_ITCM_SECTION_NAME);
GROUP_END(ITCM)
#endif
#if DT_NODE_HAS_STATUS(DT_CHOSEN(zephyr_dtcm), okay)
GROUP_START(DTCM)
SECTION_PROLOGUE(_DTCM_BSS_SECTION_NAME, (NOLOAD),SUBALIGN(8))
{
__dtcm_start = .;
__dtcm_bss_start = .;
*(.dtcm_bss)
*(".dtcm_bss.*")
__dtcm_bss_end = .;
} GROUP_LINK_IN(DTCM)
SECTION_PROLOGUE(_DTCM_NOINIT_SECTION_NAME, (NOLOAD),SUBALIGN(8))
{
__dtcm_noinit_start = .;
*(.dtcm_noinit)
*(".dtcm_noinit.*")
__dtcm_noinit_end = .;
} GROUP_LINK_IN(DTCM)
SECTION_PROLOGUE(_DTCM_DATA_SECTION_NAME,,SUBALIGN(8))
{
__dtcm_data_start = .;
*(.dtcm_data)
*(".dtcm_data.*")
__dtcm_data_end = .;
} GROUP_LINK_IN(DTCM AT> ROMABLE_REGION)
__dtcm_end = .;
__dtcm_data_rom_start = LOADADDR(_DTCM_DATA_SECTION_NAME);
GROUP_END(DTCM)
#endif
/* Located in generated directory. This file is populated by the
* zephyr_linker_sources() Cmake function.
*/