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220 Commits

Author SHA1 Message Date
Ivan Grokhotkov
16c73edc67 Merge branch 'refactor/add_alias_name_for_ets_common_api' into 'master' 
esp_rom: extract common ets apis into esp_rom_sys.h

See merge request espressif/esp-idf!9701
 2020-07-28 15:04:55 +08:00
morris
2917651478 esp_rom: extract common ets apis into esp_rom_sys.h 2020-07-27 15:27:01 +08:00
Angus Gratton
abdb657926 bootloader esp32s2: Increase bootloader DRAM & IRAM allowance 
Bootloader DRAM now ends at 0x3FFEAB00 which is the start of ROM
static RAM (reclaimable after app is running).

IRAM loader segment increased by 8KB.

Available total static RAM for the app is now reduced by 16KB.
 2020-07-27 00:01:10 +00:00
Renz Bagaporo
837052c86f esp_system: restore deleted no stack check flag 
Restores the change of startup refactor changes removed the no stack
check protection flag when compiling the source file that contains
execution of constructors - which contains function to setup stack
guard. Restore that and update the source file, since this is in the 2nd
stage of the startup now.

Closes https://github.com/espressif/esp-idf/issues/5617
 2020-07-22 11:57:18 +08:00
Angus Gratton
442736c5d6 Merge branch 'refactor/common_rom_uart_apis' into 'master' 
esp_rom: extract common uart apis into esp_rom_uart.h

See merge request espressif/esp-idf!9313
 2020-07-21 15:24:21 +08:00
Angus Gratton
3755fb6597 Merge branch 'feature/add_esp32s3_bootloader_ld_file' into 'master' 
move part of esp32-s3 codes to master (bootloader linker, esp32s3 empty componnet)

See merge request espressif/esp-idf!9608
 2020-07-21 14:51:04 +08:00
Angus Gratton
a2eed7cba6 esp32s2: Always use eFuse config for WP pin 
No reason to override just this pin in software.
 2020-07-20 14:08:49 +08:00
chenjianqiang
bff6b5b70e bugfix(psram): configure MMU after PSRAM initialization 2020-07-20 12:21:32 +08:00
morris
d066c3ab2c esp_system: add panic high interrupt handler for esp32s3 2020-07-20 11:15:24 +08:00
morris
6316e6eba2 esp_system: add CONFIG_ESP_SYSTEM_RTC_EXT_CRYS 2020-07-20 11:15:24 +08:00
morris
204cb341b1 esp32s3: initial empty component 2020-07-20 10:51:05 +08:00
Angus Gratton
f83a61e2c8 Merge branch 'feature/ulp_riscv' into 'master' 
feature/components: Initial support for ULP-RISC-V Coprocessor on esp32s2

Closes IDF-521

See merge request espressif/esp-idf!8781
 2020-07-20 08:27:20 +08:00
morris
345606e7f3 esp_rom: extract common uart apis into esp_rom_uart.h 2020-07-17 16:00:59 +08:00
Felipe Neves
b6dba84323 ulp: added support to building code for riscv ULP coprocessor 2020-07-15 15:28:49 -03:00
morris
458b14a8ea esp_rom: extract common efuse apis into esp_rom_efuse.h 2020-07-15 10:40:50 +08:00
Angus Gratton
4a0a331122 Merge branch 'bugfix/esp32s2_return_use_fixed_static_ram_size_option' into 'master' 
esp32s2: Add USE_FIXED_STATIC_RAM_SIZE feature

Closes IDF-1800

See merge request espressif/esp-idf!9033
 2020-07-14 13:14:07 +08:00
Jiang Jiang Jian
64673b45e5 Merge branch 'bugfix/esp32s2_cache_unsupport_config' into 'master' 
esp32s2: remove unsupported cache option

Closes IDFGH-3414

See merge request espressif/esp-idf!9300
 2020-07-12 21:33:56 +08:00
Wang Lei
6b12ac0968 esp32s2: remove unsupported cache option 2020-07-12 21:33:55 +08:00
Shubham Kulkarni
d4ce5de16e Include header file soc/cpu.h in memprot.c and system_api.c 
This fixes build issues with Vanilla FreeRTOS
 2020-07-10 13:56:42 +05:30
morris
a4d0033c03 esp_rom: extract common GPIO apis into esp_rom_gpio.h 2020-07-07 11:40:19 +08:00
Mahavir Jain
e62cb2be68 esp32s2: remove bt references from esp32s2 ld script 2020-07-02 03:45:05 +00:00
Darian Leung
97721d469c TWAI: Add ESP32-S2 support 
This commit adds TWAI driver support for the
ESP32-S2. The following features were added:

- Expanded BRP support
- Expanded CLKOUT Divider Support
- Updated example READMEs
 2020-06-30 16:56:03 +08:00
Ivan Grokhotkov
84833bf0df Merge branch 'feature/light_sleep_reject' into 'master' 
sleep: enable sleep reject when entering light sleep

Closes IDF-1678 and WIFI-1185

See merge request espressif/esp-idf!9242
 2020-06-29 15:57:49 +08:00
Ivan Grokhotkov
e94848556b esp32, esp32s2: update console initialization 2020-06-26 15:38:49 +02:00
Ivan Grokhotkov
4e30e8801c sleep: enable sleep reject when entering light sleep 2020-06-24 15:45:42 +00:00
Michael (XIAO Xufeng)
6b337049fb spiram: fix the read id failure 
The issue is caused by:
1. The disable_qio_mode inside read_id may have side effects.
2. read_id twice may have side effects.

Fix this issue by moving disable_qio_mode out of read_id and only do it
once before read_id. And retry read_id only when the first one is
failed.

Issue introduced in 3ecbb59c15.
 2020-06-23 11:18:20 +08:00
Renz Bagaporo
08cbfa6187 esp_system: fix various review issues 2020-06-19 18:40:10 +10:00
Renz Christian Bagaporo
67983d5c1c esp_system: restore order of some init functions 2020-06-19 18:40:10 +10:00
Renz Christian Bagaporo
20d17e648b esp32, esp32s2: remove dependency of cache err int init on freertos 2020-06-19 18:40:10 +10:00
Renz Christian Bagaporo
0f43a2620d esp_system: component init functions macro 
Allows components to declare initialization function, such that the
startup code does not have direct dependency on the component.
 2020-06-19 18:40:09 +10:00
Renz Bagaporo
bb5535ca5d esp32, esp32s2: move startup code into esp_system 2020-06-19 18:40:09 +10:00
Renz Christian Bagaporo
62ef63e835 esp32, esp32s2: move clk init functions to esp_system 2020-06-19 18:40:09 +10:00
Angus Gratton
91d8c26349 Merge branch 'bugfix/fix_16mbit_psram_id_read_error' into 'master' 
psram: fix 16mbit psram id read error

See merge request espressif/esp-idf!9083
 2020-06-19 11:49:26 +08:00
KonstantinKondrashov
96b3ab708a esp32s2: Add USE_FIXED_STATIC_RAM_SIZE feature 
This feature exists on ESP32 and missed for ESP32S2. This commit adds it for esp32s2 as well.

Closes: IDF-1800
 2020-06-17 22:24:51 +08:00
Ivan Grokhotkov
314d08e53f esp32s2: sleep_modes: remove dependency on driver/uart.h 2020-06-16 18:31:46 +02:00
Ivan Grokhotkov
5b291c032a esp32s2: suspend UART output using XOFF before entering light sleep 
Same logic as for the ESP32, except two changes:

* need to set UART_SW_FLOW_CON_EN bit for UART_FORCE_XOFF to take
  effect
* need to check if the peripheral is not clockgated and out of reset
 2020-06-16 18:13:14 +02:00
Angus Gratton
a5683f2263 Merge branch 'bugfix/efuse_logs' into 'master' 
esp32/esp32s2: Reduce using ESP_EARLY_LOGx and move some code after the stdout initialization in startup code

Closes IDFGH-3367

See merge request espressif/esp-idf!8904
 2020-06-16 13:47:02 +08:00
Krzysztof Budzynski
79a0e892a0 Merge branch 'feature/coredump_allow_variable_dumping' into 'master' 
Added coredump user defined variable into coredump

Closes IDF-44

See merge request espressif/esp-idf!8730
 2020-06-15 02:35:38 +08:00
Alexey Gerenkov
1deeadf4c5 Added coredump user defined variable into coredump 2020-06-15 02:35:38 +08:00
Angus Gratton
e29c9d331f Merge branch 'bugfix/esp32s2_define_correct_size_for_rtc_fast_mem' into 'master' 
esp32s2: Fix missed features CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP and...

Closes IDF-1800

See merge request espressif/esp-idf!9031
 2020-06-10 16:04:41 +08:00
chenjianqiang
3ecbb59c15 psram: fix 16mbit psram id read error 2020-06-05 21:06:21 +08:00
Angus Gratton
8b692c85f1 Merge branch 'test/move_rom_unit_test' into 'master' 
move rom unit test && enable intr_alloc test on esp32s2

See merge request espressif/esp-idf!8263
 2020-06-04 16:47:25 +08:00
Jakob Hasse
516680a4ff Doc: DS documentation for S2 2020-06-04 10:49:22 +08:00
morris
2ccdd7eb10 intr_alloc: using isr version of critical section 2020-06-03 13:16:13 +08:00
morris
d70961ad58 esp32s2: add more unit test for esp32s2 
Most of the test cases are copied from esp32
add int_alloc test
add delay test
add random test
 2020-06-03 13:16:13 +08:00
morris
783779c870 esp_rom: move rom api test into esp_rom component 2020-06-03 13:16:13 +08:00
KonstantinKondrashov
4d66c384a4 esp32s2: Fix missed features CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP and CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC 
Defines the correct size for RTC fast memory (the same as for ESP32).

Closes: IDF-1800
 2020-06-02 22:55:56 +08:00
KonstantinKondrashov
0b62b28e25 esp32s2: Move some code after the stdout initialization 2020-06-01 20:46:21 +08:00
Angus Gratton
baedfab382 Merge branch 'feature/dis_uart_dl_mode' into 'master' 
feature: Disable UART download mode

Closes IDF-1386

See merge request espressif/esp-idf!8590
 2020-05-29 14:09:54 +08:00
Angus Gratton
59f29cbca8 Merge branch 'feature/allow_rtc_memory_for_task_stacks' into 'master' 
Add RTC Fast Memory to Dynamic Memory Pool

See merge request espressif/esp-idf!8390
 2020-05-29 14:07:01 +08:00
Angus Gratton
f64ae4fa99 efuse: Add 'disable Download Mode' & ESP32-S2 'Secure Download Mode' functionality 2020-05-28 17:50:45 +10:00
jiangguangming
b25ccde45f flash mmap: fix bug for cache2phys and phys2cache on esp32s2 2020-05-26 15:14:23 +08:00
Angus Gratton
084e170a8f Merge branch 'refactor/esp_ipc' into 'master' 
Split esp_ipc to a seaparate component

Closes IDF-1295

See merge request espressif/esp-idf!8520
 2020-05-25 15:03:04 +08:00
Ivan Grokhotkov
948580d1a2 Merge branch 'gdb/bt_on_invalid_pc' into 'master' 
gdb: Modify PC in case of invalid PC

See merge request espressif/esp-idf!8391
 2020-05-19 16:44:07 +08:00
Darian Leung
11d96b39d0 esp_ipc: Move to new component 
This commit moves esp_ipc into a separate component.
 2020-05-18 16:51:45 +08:00
Mahavir Jain
18c1838587 esp32s2: add config option to place RTC data in fast RAM 2020-05-14 13:12:26 +00:00
Mahavir Jain
1aac284dda heap: add rtc fast memory region to dynamic pool 
- for ESP32 only enabled in case of unicore config
- capability wise this region (8K) is same as DRAM, except non-DMA capable
- also fixed small issue in reserved memory region processing when (start == end)
 2020-05-14 13:12:26 +00:00
Xia Xiaotian
526a3e49ed esp_wifi: When WiFi TSF is active, skip light sleep 
* Add an API for peripherals to set callbacks to skip light sleep

* Make WiFi power save example work
 2020-05-13 19:31:36 +08:00
Michael (XIAO Xufeng)
f7ec57b615 Merge branch 'feature/usb_wrap_headers' into 'master' 
usb: add usb_wrap headers, move some code from LL to HAL

See merge request espressif/esp-idf!8395
 2020-05-10 19:19:14 +08:00
Sachin Parekh
46d914ff45 gdb: Modify PC in case of invalid PC 
Signed-off-by: Sachin Parekh <sachin.parekh@espressif.com>
 2020-05-08 18:34:52 +05:30
Ivan Grokhotkov
66889a7a58 esp32s2: return correct CPU number in esp_cache_err_get_cpuid 2020-05-04 10:13:14 +00:00
Angus Gratton
d013105256 Merge branch 'feature/twdt_prints_backtrace' into 'master' 
Add Task Watchdog backtrace printing

Closes IDF-1072

See merge request espressif/esp-idf!8136
 2020-05-04 14:58:53 +08:00
Angus Gratton
158ab5a9b9 Remove "disable ROM BASIC boot mode" from ESP32-S2 
Feature removed from ESP32-S2 ROM (was present in S2 Beta ROM)
 2020-05-01 16:16:47 +10:00
Ivan Grokhotkov
897e69cc9d soc, esp32s2: add usb_wrap peripheral 2020-04-29 10:04:13 +02:00
Darian Leung
b097dd0a79 Add Task Watchdog backtrace printing 
This commit makes the Task Watchdog print the backtrace of both
cores when it times out.
 2020-04-27 18:11:29 +00:00
Jakob Hasse
2da7e65646 Doc: S2 HMAC documentation 2020-04-27 12:25:46 +08:00
Ivan Grokhotkov
275ed32a11 Merge branch 'feature/esp32s2_iram_dram_protection' into 'master' 
esp32s2: IRAM/DRAM memory protection

See merge request espressif/esp-idf!8156
 2020-04-23 21:52:54 +08:00
Martin Vychodil
7491ea677a esp32s2: IRAM/DRAM memory protection 
* new mem_prot API
* mem_prot on & locked by default (see Kconfig)
* feature activated in start_cpu0_default()

JIRA IDF-1355
 2020-04-21 15:10:58 +02:00
Ivan Grokhotkov
9003c01b4b Merge branch 'init_priority_fix' into 'master' 
CXX: make __attribute__((init_priority(n))) work

See merge request espressif/esp-idf!8276
 2020-04-17 17:56:10 +08:00
Angus Gratton
433c1c9ee1 Merge branch 'bugfix/ds_mpi_lock' into 'master' 
crypto: DS uses RSA peripheral, added shared lock

See merge request espressif/esp-idf!8274
 2020-04-15 15:15:25 +08:00
Wang Jia Lin
b3d8b6a250 Merge branch 'bugfix/fix_esp32s2_soc_bug' into 'master' 
RTC regulator & voltage calibration fixes

See merge request espressif/esp-idf!8137
 2020-04-10 14:25:41 +08:00
Chai Ji’e
dac17709ec RTC regulator & voltage calibration fixes 2020-04-10 14:25:40 +08:00
Marius Vikhammer
a2a204c2b9 crypto: DS uses RSA peripheral, added shared lock 2020-04-09 11:11:04 +00:00
Jakob Hasse
4943b1cbf0 CXX: make __attribute__((init_priority(n))) work 
* Added corresponding test case
* Moved all C++ init tests to separate file

Closes https://github.com/espressif/esp-idf/issues/5038
 2020-04-08 09:11:54 +08:00
Marius Vikhammer
0a41bd3833 esp32s2 sha test: update "Test esp_sha" to use cache compensated timer for performance measuring 2020-04-06 06:37:28 +00:00
Jakob Hasse
0b02e5358e Digital Signature HW: adding S2 support 2020-04-01 13:47:13 +08:00
KonstantinKondrashov
df2ea2527f esp32s2: Add a Kconfig option- Number of attempts to repeat 32k XTAL calibration 2020-03-27 04:56:44 +00:00
Jakob Hasse
ea47bbb118 HMAC: adding upstream message support 2020-03-26 19:00:27 +08:00
Michael (XIAO Xufeng)
42c552242b Merge branch 'feature/fix_touch_driver_for_esp32s2' into 'master' 
driver(touch): fix touch sensor driver for esp32s2

See merge request espressif/esp-idf!7664
 2020-03-26 09:50:42 +08:00
Darian Leung
91841a53ff WDT: Add LL and HAL for watchdog timers 
This commit updates the watchdog timers (MWDT and RWDT)
in the following ways:

- Add seprate LL for MWDT and RWDT.
- Add a combined WDT HAL for all Watchdog Timers
- Update int_wdt.c and task_wdt.c to use WDT HAL
- Remove most dependencies on LL or direct register access
  in other components. They will now use the WDT HAL
- Update use of watchdogs (including RTC WDT) in bootloader and
  startup code to use the HAL layer.
 2020-03-26 02:14:02 +08:00
fuzhibo
340563f479 Driver(touch): fix touch sensor driver for esp32s2. 
1.update touch sensor driver for esp32s2;
2.update unit test for touch sensor;
3.update register files about touch sensor;
 2020-03-25 22:45:57 +08:00
Angus Gratton
62426a6c90 Merge branch 'refactor/use_new_component_registration_functions' into 'master' 
CMake: Use new component registration function

See merge request espressif/esp-idf!8068
 2020-03-25 08:02:42 +08:00
Renz Bagaporo
3d0967a58a test: declare requirements and include dirs private 2020-03-23 10:58:50 +08:00
Ivan Grokhotkov
18bc25b3a6 cpu_start: handle CONFIG_VFS_SUPPORT_IO 2020-03-20 14:03:45 +01:00
Wang Jia Lin
47253a827a Merge branch 'bugfix/esp32s2_support_16Mbit_psram' into 'master' 
bugfix(psram): add 16Mbit psram support for esp32s2

See merge request espressif/esp-idf!8011
 2020-03-20 00:22:49 +08:00
Angus Gratton
207914a13a Merge branch 'refactor/common_code_panic_handler' into 'master' 
Panic handling common code refactor

See merge request espressif/esp-idf!7489
 2020-03-19 11:23:57 +08:00
chenjianqiang
140e0390cc psram: add psram size auto detect for esp32s2 2020-03-19 10:53:47 +08:00
chenjianqiang
42154848cc psram: add 16Mbit psram support for esp32s2 2020-03-18 11:15:00 +08:00
Angus Gratton
59381b60c0 Merge branch 'refactor/hal_function_set_exception_vector_table' into 'master' 
soc: add hal api to set exception vector table base address

See merge request espressif/esp-idf!7905
 2020-03-11 14:44:42 +08:00
Renz Bagaporo
890510aecd esp32, esp32s2: move reset reason source to esp_system 2020-03-10 19:56:24 +08:00
Renz Christian Bagaporo
2b100789b7 esp32, esp32s2: move panic handling code to new component 2020-03-10 19:56:24 +08:00
morris
8b6c0947c7 soc: add hal api to set exception vector table base address 2020-03-06 20:23:30 +08:00
morris
f735b8891e esp32s2: print app description on startup 2020-03-06 15:24:28 +08:00
Renz Bagaporo
71c02394e5 esp32s2: remove esp_intr.h header 2020-03-05 16:15:59 +08:00
Renz Christian Bagaporo
7386ac6d15 esp32s2: remove calls to stall/unstall other core 2020-02-27 07:15:15 +05:00
Renz Christian Bagaporo
cefc71cdcd bootloader_support: mem-related initializations using cpu abstractions 2020-02-27 07:14:21 +05:00
Renz Christian Bagaporo
c9a51bfbb2 soc: create abstraction for cpu related operations 2020-02-27 07:14:19 +05:00
Ivan Grokhotkov
cee7377e3c esp32s2: hide “FPGA” as an option for CPU frequency 
unless IDF_ENV_FPGA is set.
 2020-02-17 17:33:56 +01:00
Ivan Grokhotkov
a8ad9d6b43 esp32s2: use smaller RTC_CLK_CAL_CYCLES by default 
Reduce the number proportionally to the frequency (160k on ESP32,
90k on ESP32-S2).
 2020-02-17 17:33:56 +01:00
Ivan Grokhotkov
490bf29767 esp32s2: fix enabling 32k XTAL clock 
On the ESP32S2, rtc_clk_cal(RTC_CAL_RTC_MUX) measures the frequency
of the 90kHz RTC clock regardless of the selected slow clock
frequency. Keep track which clock is selected and pass the argument
to rtc_clk_cal accordingly.

fix clock choices

update rtc 32k xtal code for s2

missed api in rtc.h

bootloader_clock: update for S2
 2020-02-17 17:33:56 +01:00
Ivan Grokhotkov
74ac618287 soc/rtc: update frequency switching APIs to match the master branch 
esp32s2 code was based in IDF v3.1, and used outdated APIs.

Closes IDF-670
 2020-02-17 17:23:32 +01:00
Ivan Grokhotkov
d2d3269159 esp32s2: sync esp_pm code from esp32 2020-02-17 16:03:47 +01:00
Jiang Jiang Jian
54a50f4532 Merge branch 'feature/support_esp32s2_wifi_v2' into 'master' 
WiFi: Add support for ESP32S2

See merge request espressif/esp-idf!7505
 2020-02-14 11:54:13 +08:00
Renz Christian Bagaporo
16e0c93e40 ci: solve public headers errors 2020-02-11 14:30:42 +05:00
Andrei Gramakov
4e8b4b9e49 soc: add USB peripheral register definitions, hal level, reg map, etc 2020-02-10 08:33:39 +00:00
Konstantin Kondrashov
daa9c30c8e rmt/esp32s2: Update RMT: reg, struct, LL and test_utils/ref_clock.c 2020-02-09 20:03:31 +08:00
Angus Gratton
11fac8637a docs: Resolve doxygen & Sphinx warnings 2020-02-07 16:37:45 +11:00
Sagar Bijwe
4f93a707f8 WiFi: Add support for ESP32S2 
1) Update WiFi and PHY libs for ESP32S2.
2) Remove KConfig options ESP32S2 PHY lib selection.
3) Change target macros from ESP32S2BETA to ESP32S2
 2020-02-06 14:19:30 +05:30
Konstantin Kondrashov
739eb05bb9 esp32: add implementation of esp_timer based on TG0 LAC timer 
Closes: IDF-979
 2020-02-06 14:00:18 +08:00
Ivan Grokhotkov
50466a5e4f Merge branch 'bugfix/esp32s2_ldscripts' into 'master' 
esp32s2: LD script fixes/improvements and re-enable SystemView examples

Closes IDF-1357, IDF-1354, and IDF-1346

See merge request espressif/esp-idf!7431
 2020-02-05 02:09:29 +08:00
Ivan Grokhotkov
41631587f8 Merge branch 'feature/esp32s2_brownout' into 'master' 
esp32s2: add brownout detector support

Closes IDF-751

See merge request espressif/esp-idf!7428
 2020-02-04 17:00:46 +08:00
Felipe Neves
429712c6eb freertos: moved all xtensa specific files into a separated folder 2020-01-27 16:05:30 -03:00
Ivan Grokhotkov
bb59ca3ab3 esp32s2: add missing ESP32S2_MEMMAP_TRACEMEM_TWOBANKS option 
It is used when app-trace is enabled, to provide ping-pong buffers.
 2020-01-24 10:48:38 +01:00
Ivan Grokhotkov
02a99e84c8 esp32s2: move trace memory reservation to soc_memory_layout.c 2020-01-24 10:48:38 +01:00
Ivan Grokhotkov
110f3c9ff5 esp32s2: put static .data and .bss directly after .iram.text 
This results in a single large heap section instead of two smaller
ones.

Closes IDF-1354
 2020-01-24 10:48:38 +01:00
Ivan Grokhotkov
27bff3517f esp32s2: fix "loadable ELF" build 
Closes IDF-1346
 2020-01-24 10:48:20 +01:00
Ivan Grokhotkov
caef7ad9f2 esp32, esp32s2beta: move brownout.c to esp_common 2020-01-23 13:44:19 +01:00
Ivan Grokhotkov
70752baba4 esp32s2: add brownout detector support 
1. add brownout detector HAL for esp32 and esp32s2
2. enable brownout reset for esp32 rev. 1 and above
3. add approximate brownout detector levels for esp32s2
 2020-01-23 13:44:19 +01:00
Ivan Grokhotkov
cbb84e8f5e esp32s2: fix THREADPTR calculation, re-enable FreeRTOS TLS tests 
1. Clarify THREADPTR calculation in FreeRTOS code, explaining where
the constant 0x10 offset comes from.

2. On the ESP32-S2, .flash.rodata section had different default
alignment (8 bytes instead of 16), which resulted in different offset
of the TLS sections. Unfortunately I haven’t found a way to query
section alignment from C code, or to use a constant value to define
section alignment in the linker script. The linker scripts are
modified to force a fixed 16 byte alignment for .flash.rodata on the
ESP32 and ESP32-S2beta. Note that the base address of .flash.rodata
was already 16 byte aligned, so this has not changed the actual
memory layout of the application.

Full explanation of the calculation below.

Assume we have the TLS template section base address
(tls_section_vma), the address of a TLS variable in the template
(address), and the final relocation value (offset). The linker
calculates:
offset = address - tls_section_vma + align_up(TCB_SIZE, alignment).

At run time, the TLS section gets copied from _thread_local_start
(in .rodata) to task_thread_local_start. Let’s assume that an address
of a variable in the runtime TLS section is runtime_address.
Access to this address will happen by calculating THREADPTR + offset.
So, by a series of substitutions:

THREADPTR + offset = runtime_address THREADPTR = runtime_address - offset
THREADPTR = runtime_address - (address - tls_section_vma + align_up(TCB_SIZE, alignment)) THREADPTR = (runtime_address - address) + tls_section_vma - align_up(TCB_SIZE, alignment)

The difference between runtime_address and address is same as the
difference between task_thread_local_start and _thread_local_start.
And tls_section_vma is the address of .rodata section, i.e.
_rodata_start. So we arrive to

THREADPTR = task_thread_local_start - _thread_local_start + _rodata_start - align_up(TCB_SIZE, alignment).

The idea with TCB_SIZE being added to the THREADPTR when computing
the relocation was to let the OS save TCB pointer in the TREADPTR
register. The location of the run-time TLS section was assumed to be
immediately after the TCB, aligned to whatever the section alignment
was. However in our case the problem is that the run-time TLS section
is stored not next to the TCB, but at the top of the stack. Plus,
even if it was stored next to the TCB, the size of a FreeRTOS TCB is
not equal to 8 bytes (TCB_SIZE hardcoded in the linker). So we have
to calculate THREADPTR in a slightly obscure way, to compensate for
these differences.

Closes IDF-1239
 2020-01-23 11:29:22 +01:00
morris
e30cd361a8 global: rename esp32s2beta to esp32s2 2020-01-22 12:14:38 +08:00