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[DRAFT] LLEXT DRAM data #9721

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[DRAFT] LLEXT DRAM data #9721

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08e711a
llext: add support for read-only data in DRAM
lyakh Dec 11, 2024
fa5d722
llext: add a macro for read-only "cold" DRAM data
lyakh Dec 11, 2024
e2d6d11
audio: src: move all coefficients to DRAM
lyakh Dec 11, 2024
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42 changes: 28 additions & 14 deletions scripts/llext_link_helper.py
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Original file line number Diff line number Diff line change
Expand Up @@ -76,6 +76,7 @@ def main():
executable = []
writable = []
readonly = []
readonly_dram = []
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I assume this will all be dumped when we build the target i.e. xkB hybrid RODATA in DRAM ?


text_found = False

Expand All @@ -101,10 +102,7 @@ def main():
if (s_flags & (SH_FLAGS.SHF_ALLOC | SH_FLAGS.SHF_EXECINSTR) ==
SH_FLAGS.SHF_ALLOC | SH_FLAGS.SHF_EXECINSTR and
s_type == 'SHT_PROGBITS'):
# An executable section, currently only a single .text is supported.
# In general additional executable sections are possible, e.g.
# .init. In the future support for arbitrary such sections can be
# added, similar to writable and read-only data below.
# An executable section.
if s_name == '.text':
text_found = True
text_addr = max_alignment(text_addr, 0x1000, s_alignment)
Expand All @@ -123,7 +121,10 @@ def main():

if s_type == 'SHT_PROGBITS' and s_flags & SH_FLAGS.SHF_ALLOC:
# .rodata or other read-only sections
readonly.append(section)
if '.dram' in s_name:
readonly_dram.append(section)
else:
readonly.append(section)

if not text_found:
raise RuntimeError('No .text section found in the object file')
Expand All @@ -136,24 +137,37 @@ def main():
# run at arbitrary memory locations. One of the use-cases is running
# parts of the module directly in DRAM - sacrificing performance but
# saving scarce SRAM. We achieve this by placing non-performance
# critical functions in a .text.dram ELF section. When compiling and
# linking such functions, an additional .literal.dram section is
# automatically created. Note, that for some reason the compiler also
# marks that section as executable.
# critical functions in a .text.dram ELF section, read-only data in a
# .rodata.dram ELF section, etc. When compiling and
# linking such functions, additional sections like .literal.dram are
# automatically created. Note, that for some reason for .text.dram the
# compiler also marks that section as executable.
# This script links those sections at address 0. We could hard-code
# section names, but so far we choose to only link .text the "original"
# way and all other executable sections we link at 0.
exe_addr = 0
# way and all other executable sections we link at 0. For data sections
# we accept any *.dram names.

dram_addr = 0

for section in executable:
s_alignment = section.header['sh_addralign']
s_name = section.name

exe_addr = align_up(exe_addr, s_alignment)
dram_addr = align_up(dram_addr, s_alignment)

command.append(f'-Wl,--section-start={s_name}=0x{dram_addr:x}')

dram_addr += section.header['sh_size']

for section in readonly_dram:
s_alignment = section.header['sh_addralign']
s_name = section.name

dram_addr = align_up(dram_addr, s_alignment)

command.append(f'-Wl,--section-start={s_name}=0x{exe_addr:x}')
command.append(f'-Wl,--section-start={s_name}=0x{dram_addr:x}')

exe_addr += section.header['sh_size']
dram_addr += section.header['sh_size']

start_addr = align_up(text_addr + text_size, 0x1000)

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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_10_21_2500_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_10_21_2500_5000_fir[480] = {
__cold_data static const int32_t src_int32_10_21_2500_5000_fir[480] = {
176197,
283398,
-489527,
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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_10_21_3455_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_10_21_3455_5000_fir[640] = {
__cold_data static const int32_t src_int32_10_21_3455_5000_fir[640] = {
110400,
517669,
162088,
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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_10_21_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_10_21_4535_5000_fir[2320] = {
__cold_data static const int32_t src_int32_10_21_4535_5000_fir[2320] = {
26554,
22041,
-35569,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_10_9_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_10_9_4535_5000_fir[1080] = {
__cold_data static const int32_t src_int32_10_9_4535_5000_fir[1080] = {
-35695,
60551,
-91611,
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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_16_21_4319_5000.h
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_16_21_4319_5000_fir[1472] = {
__cold_data static const int32_t src_int32_16_21_4319_5000_fir[1472] = {
69743,
-28255,
-123867,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_16_21_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_16_21_4535_5000_fir[2048] = {
__cold_data static const int32_t src_int32_16_21_4535_5000_fir[2048] = {
66387,
-68365,
-7975,
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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_16_7_4082_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_16_7_4082_5000_fir[896] = {
__cold_data static const int32_t src_int32_16_7_4082_5000_fir[896] = {
-71000,
181977,
-339747,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_2_2268_5000.h
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Expand Up @@ -7,7 +7,7 @@
/** \cond GENERATED_BY_TOOLS_TUNE_SRC */
#include <stdint.h>

static const int32_t src_int32_1_2_2268_5000_fir[36] = {
__cold_data static const int32_t src_int32_1_2_2268_5000_fir[36] = {
1065827,
-37924,
-4976218,
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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_2_2500_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_2_2500_5000_fir[40] = {
__cold_data static const int32_t src_int32_1_2_2500_5000_fir[40] = {
-879692,
460291,
4237437,
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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_2_2721_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_2_2721_5000_fir[44] = {
__cold_data static const int32_t src_int32_1_2_2721_5000_fir[44] = {
776925,
-535235,
-3522824,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_2_3401_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_2_3401_5000_fir[60] = {
__cold_data static const int32_t src_int32_1_2_3401_5000_fir[60] = {
483288,
-83413,
-1522435,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_2_3887_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_2_3887_5000_fir[84] = {
__cold_data static const int32_t src_int32_1_2_3887_5000_fir[84] = {
488732,
-7737,
-1049640,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_2_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_2_4535_5000_fir[192] = {
__cold_data static const int32_t src_int32_1_2_4535_5000_fir[192] = {
-215107,
-43725,
301513,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_3_2268_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_3_2268_5000_fir[52] = {
__cold_data static const int32_t src_int32_1_3_2268_5000_fir[52] = {
856478,
-618891,
-4156030,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_3_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_3_4535_5000_fir[260] = {
__cold_data static const int32_t src_int32_1_3_4535_5000_fir[260] = {
-76785,
87265,
208768,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_4_1512_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_4_1512_5000_fir[52] = {
__cold_data static const int32_t src_int32_1_4_1512_5000_fir[52] = {
740488,
-111252,
-2633435,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_4_2268_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_4_2268_5000_fir[60] = {
__cold_data static const int32_t src_int32_1_4_2268_5000_fir[60] = {
-1265010,
-1300023,
42822,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_4_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_4_4535_5000_fir[332] = {
__cold_data static const int32_t src_int32_1_4_4535_5000_fir[332] = {
-246503,
-173077,
24381,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_1_6_1134_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_1_6_1134_5000_fir[68] = {
__cold_data static const int32_t src_int32_1_6_1134_5000_fir[68] = {
-2393808,
-3445469,
-3907601,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_20_21_1250_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_20_21_1250_5000_fir[320] = {
__cold_data static const int32_t src_int32_20_21_1250_5000_fir[320] = {
134710,
1035873,
-9174506,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_20_21_2500_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_20_21_2500_5000_fir[560] = {
__cold_data static const int32_t src_int32_20_21_2500_5000_fir[560] = {
-5217,
-381011,
1487277,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_20_21_3125_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_20_21_3125_5000_fir[640] = {
__cold_data static const int32_t src_int32_20_21_3125_5000_fir[640] = {
81905,
-392860,
605436,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_20_21_4167_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_20_21_4167_5000_fir[1200] = {
__cold_data static const int32_t src_int32_20_21_4167_5000_fir[1200] = {
54594,
-184742,
399571,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_20_21_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_20_21_4535_5000_fir[2080] = {
__cold_data static const int32_t src_int32_20_21_4535_5000_fir[2080] = {
-39854,
85177,
-146854,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_20_7_2976_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_20_7_2976_5000_fir[560] = {
__cold_data static const int32_t src_int32_20_7_2976_5000_fir[560] = {
-33375,
393038,
-1331352,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_10_2500_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_10_2500_5000_fir[504] = {
__cold_data static const int32_t src_int32_21_10_2500_5000_fir[504] = {
7704,
568453,
-2657822,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_10_3455_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_10_3455_5000_fir[756] = {
__cold_data static const int32_t src_int32_21_10_3455_5000_fir[756] = {
-37222,
240677,
-698458,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_10_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_10_4535_5000_fir[2520] = {
__cold_data static const int32_t src_int32_21_10_4535_5000_fir[2520] = {
-9118,
18975,
-33943,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_16_4319_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_16_4319_5000_fir[1596] = {
__cold_data static const int32_t src_int32_21_16_4319_5000_fir[1596] = {
-50136,
105527,
-181643,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_16_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_16_4535_5000_fir[2436] = {
__cold_data static const int32_t src_int32_21_16_4535_5000_fir[2436] = {
-15208,
29050,
-48628,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_20_1250_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_20_1250_5000_fir[420] = {
__cold_data static const int32_t src_int32_21_20_1250_5000_fir[420] = {
94664,
-1133291,
202774,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_20_2500_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_20_2500_5000_fir[504] = {
__cold_data static const int32_t src_int32_21_20_2500_5000_fir[504] = {
8116,
587965,
-2725209,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_20_3125_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_20_3125_5000_fir[672] = {
__cold_data static const int32_t src_int32_21_20_3125_5000_fir[672] = {
4928,
190845,
-929522,
Expand Down
2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_20_4167_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_20_4167_5000_fir[1260] = {
__cold_data static const int32_t src_int32_21_20_4167_5000_fir[1260] = {
-79259,
176349,
-298364,
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2 changes: 1 addition & 1 deletion src/audio/src/coef/src_ipc4_int32_21_20_4535_5000.h
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Expand Up @@ -8,7 +8,7 @@

#include <stdint.h>

static const int32_t src_int32_21_20_4535_5000_fir[2268] = {
__cold_data static const int32_t src_int32_21_20_4535_5000_fir[2268] = {
-37260,
62223,
-92794,
Expand Down
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