Commit Graph

10 Commits

Author SHA1 Message Date
Angus Gratton
87e13baaf1 freertos: Add RISC-V port
Changes come from internal branch commit a6723fc
2020-11-13 07:49:11 +11:00
Angus Gratton
66fb5a29bb Whitespace: Automated whitespace fixes (large commit)
Apply the pre-commit hook whitespace fixes to all files in the repo.

(Line endings, blank lines at end of file, trailing whitespace)
2020-11-11 07:36:35 +00:00
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
michael
4220752aed ut: Move tests back from "esp32" subfolder
DISABLED_FOR_TARGETS macros are used

Partly revert "ci: disable unavailable tests for esp32s2beta"

This partly reverts commit 76a3a5fb48.

Partly revert "ci: disable UTs for esp32s2beta without runners"

This partly reverts commit eb158e9a22.

Partly revert "fix unit test and examples for s2beta"

This partly reverts commit 9baa7826be.

Partly revert "efuse: Add support for esp32s2beta"

This partly reverts commit db84ba868c.
2020-01-06 17:13:53 +08:00
Mahavir Jain
8e28226935 Disable few test cases for ESP32S2BETA
These test cases will be fixed in subsequent MR
2019-12-09 16:30:55 +05:30
Ivan Grokhotkov
6091021e83 unity: separate common and IDF specific functionality
New unity component can be used for testing other applications.
Upstream version of Unity is included as a submodule.
Utilities specific to ESP-IDF unit tests (partitions, leak checking
setup/teardown functions, etc) are kept only in unit-test-app.
Kconfig options are added to allow disabling certain Unity features.
2018-11-19 12:36:31 +08:00
Angus Gratton
b6a7458e14 esp32 tests: TLS test: use same size stack for static & non-static task
Use constant instead of magic number of task priorities.
2018-07-23 03:54:44 +00:00
Angus Gratton
7313f3f925 esp32: Fix race in "TLS Test" where s_task can go out of scope before cleanup finishes
Probable cause for CI failures of "LoadStoreError" after this task finishes running.
2018-07-23 03:54:44 +00:00
Alexey Gerenkov
f8c42369f1 freertos: Adds C11 TLS support 2018-02-07 18:46:57 +03:00