Merge pull request #397 from stnolting/cleanup_crt0

[sw} cleanup crt0 start-up code

CHANGELOG.md

@@ -32,6 +32,7 @@ mimpid = 0x01040312 => 01.04.03.12 => Version 01.04.03.12 => v1.4.3.12
 
 | Date (*dd.mm.yyyy*) | Version | Comment |
 |:-------------------:|:-------:|:--------|
+| 26.08.2022 | 1.7.5.8 | cleanup **crt0** start-up code: remove setup of `mcountern` and `mcountinhibit` CSRs; [#397](https://github.com/stnolting/neorv32/pull/397) |
 | 24.08.2022 | 1.7.5.7 | minor rtl cleanups [#396](https://github.com/stnolting/neorv32/pull/396) |
 | 20.08.2022 | 1.7.5.6 | :sparkles: update software framework to GCC 12.1.0 (new prebuilt toolchains available!) [#391](https://github.com/stnolting/neorv32/pull/391) |
 | 18.08.2022 | 1.7.5.5 | :lock: add **TRNG** read data protection; [#389](https://github.com/stnolting/neorv32/pull/389) |

docs/datasheet/software.adoc

@@ -486,7 +486,7 @@ phase where the application might not provide a trap handling yet.
 ** All interrupt sources are disabled and all pending interrupts are cleared.
 . Initialize the global pointer `gp` and the stack pointer `sp` according to the <<_ram_layout>> provided by the linker script.
 during the early boot phase.
-. Clear all counter CSRs and stop auto-increment.
+. Clear <<_cycleh>> and <<_instreth>> counter CSRs.
 . Clear the `.bss` section defined by the linker script.
 . Copy read-only data from the `.text` section to the `.data` section to set initialized variables.
 . Call and execute all _constructors_ (if there are any)

rtl/core/neorv32_application_image.vhd

@@ -1,8 +1,8 @@
 -- The NEORV32 RISC-V Processor: https://github.com/stnolting/neorv32
 -- Auto-generated memory initialization file (for APPLICATION) from source file <blink_led/main.bin>
--- Size: 1016 bytes
+-- Size: 1008 bytes
 -- MARCH: default
--- Built: 20.08.2022 18:15:44
+-- Built: 26.08.2022 15:55:14
 
 -- prototype defined in 'neorv32_package.vhd'
 package body neorv32_application_image is
@@ -14,13 +14,11 @@ x"ff810113",
 x"80000197",
 x"7f418193",
 x"00000517",
-x"13050513",
+x"12850513",
 x"30551073",
 x"30001073",
 x"30401073",
 x"34401073",
-x"32001073",
-x"30601073",
 x"b0001073",
 x"b8001073",
 x"b0201073",
@@ -45,11 +43,11 @@ x"00000e13",
 x"00000e93",
 x"00000f13",
 x"00000f93",
-x"3f800593",
+x"3f000593",
 x"80000617",
-x"f6860613",
+x"f7060613",
 x"80000697",
-x"f6068693",
+x"f6868693",
 x"00c58e63",
 x"00d65c63",
 x"0005a703",
@@ -58,15 +56,15 @@ x"00458593",
 x"00460613",
 x"fedff06f",
 x"80000717",
-x"f3c70713",
+x"f4470713",
 x"80000797",
-x"f3478793",
+x"f3c78793",
 x"00f75863",
 x"00072023",
 x"00470713",
 x"ff5ff06f",
-x"3f800413",
-x"3f800493",
+x"3f000413",
+x"3f000493",
 x"00945a63",
 x"0009a083",
 x"000080e7",
@@ -77,8 +75,8 @@ x"00000593",
 x"088000ef",
 x"30047073",
 x"34051073",
-x"3f800413",
-x"3f800493",
+x"3f000413",
+x"3f000493",
 x"00945a63",
 x"00042083",
 x"000080e7",