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esp32: IRAM_DATA_ATTR and IRAM_BSS_ATTR introduced

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Using these attributes, .data and .bss can be placed in IRAM

Signed-off-by: Sachin Parekh <sachin.parekh@espressif.com>
This commit is contained in:
Sachin Parekh
2020-04-16 16:02:07 +05:30
parent f245a518be
commit 1e6c25992e
4 changed files with 55 additions and 3 deletions
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27
components/esp32/ld/esp32.project.ld.in
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@@ -160,7 +160,6 @@ SECTIONS
mapping[iram0_text]
_iram_text_end = ABSOLUTE(.);
} > iram0_0_seg
.dram0.data :
@@ -338,9 +337,31 @@ SECTIONS
.iram0.text_end (NOLOAD) :
{
. = ALIGN (4);
_iram_end = ABSOLUTE(.);
_iram_text_end = ABSOLUTE(.);
} > iram0_0_seg
.iram0.data :
{
. = ALIGN(4);
_iram_data_start = ABSOLUTE(.);
mapping[iram0_data]
_iram_data_end = ABSOLUTE(.);
} > iram0_0_seg
.iram0.bss (NOLOAD) :
{
. = ALIGN(4);
_iram_bss_start = ABSOLUTE(.);
mapping[iram0_bss]
_iram_bss_end = ABSOLUTE(.);
. = ALIGN(4);
_iram_end = ABSOLUTE(.);
} > iram0_0_seg
/* Marks the end of data, bss and possibly rodata */
.dram0.heap_start (NOLOAD) :
{
@@ -349,7 +370,7 @@ SECTIONS
} > dram0_0_seg
}
ASSERT(((_iram_text_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)),
ASSERT(((_iram_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)),
"IRAM0 segment data does not fit.")
ASSERT(((_heap_start - ORIGIN(dram0_0_seg)) <= LENGTH(dram0_0_seg)),

10
components/esp32/ld/esp32_fragments.lf
View File

@@ -40,6 +40,14 @@ entries:
entries:
.iram1+
[sections:iram_data]
entries:
.iram.data+
[sections:iram_bss]
entries:
.iram.bss+
[sections:dram]
entries:
.dram1+
@@ -64,6 +72,8 @@ entries:
bss -> dram0_bss
common -> dram0_bss
iram -> iram0_text
iram_data -> iram0_data
iram_bss -> iram0_bss
dram -> dram0_data
rtc_text -> rtc_text
rtc_data -> rtc_data