M Hightower 3d9aeeff2d

Fix pre-SDK Cache_Read_Enable for PUYA flash (#8658) ...

* Enable SPI_CS_SETUP for early ICACHE use

The SPI_CS_SETUP parameter has been observed set by RTOS SDK and NONOS SDK
as part of flash init/configuration. It may be necessary for some flash
chips to perform correctly with ICACHE hardware access. Turning on and
leaving it on should be okay.

* Cleanup comment

* Change umm_init to default to IRAM

Some flash chips (PUYA) have some unknown requirements for running with
early `Cache_Read_Enable`. They work fine after the SDK is started.
For now, change umm_init to default to IRAM.
Define UMM_INIT_USE_ICACHE to move to ICACHE and free up IRAM.

Added some experimental code that may indirectly support PUYA.

Note, until this issue is resolved, that HWDT Stack Dump is not
going to work with PUYA flash.

* typo

* Finalize fix for PUYA flash and preSDK use of Cache_Read_Enable.

This resolves the exception 0 issue with PUYA flash when using
flash/ICACHE for umm_init and/or using HWDT Stack Dump.

2022-11-04 13:51:53 +03:00

..

esp8266

Fix pre-SDK Cache_Read_Enable for PUYA flash (#8658)

2022-11-04 13:51:53 +03:00