arm/qemuv7a: Modify link script

[W-M-R]

Summary

1. Modify to map to the specified memory, CONFIG_FLASH_START and CONFIG_RAM_START
2. Add explanation README.TXT

Impact

All configurations under qemev7a have been specified with CONFIG_FLASH_START CONFIG_FLASH_SIZE, CONFIG_RAM-START, and CONFIG_RAM_SIZE

Testing

No

[nuttxpr]

[Experimental Bot, please feedback here]

No, this PR does not meet the NuttX requirements.

Missing Information:

• Summary:
  • Lacks a clear explanation of why the change is necessary. Is it a bug fix, performance improvement, or new feature?
  • Doesn't specify what functional part of the code is being changed. Mention specific files or modules.
  • How does the mapping to CONFIG_FLASH_START and CONFIG_RAM_START actually work? What code is modified?
  • Are there related NuttX issues?
• Impact:
  • While it states all configurations are impacted, it's unclear what the user-facing consequences are. Will applications behave differently? Are there potential compatibility issues?
  • Will the build process change for any boards? Provide specifics if yes.
• Testing:
  • Unacceptable: "No" is not sufficient. You must provide testing evidence.
  • List the specific host operating systems, compilers, target architectures, and boards used for testing.
  • Include relevant log snippets demonstrating the problem before the change and the correct behavior after the change.

Recommendations:

1. Expand the Summary: Clearly articulate the problem or need this PR addresses. Provide more context on the code being modified and the mechanics of the change.
2. Detail Impact: Go beyond stating configurations are affected. Explain the consequences for users, build processes, and potential compatibility concerns.
3. Provide Thorough Testing Information: Testing is crucial! List all host and target environments, and include log snippets showing before/after behavior.

Without these improvements, it's difficult for maintainers to assess the PR's validity and safety.

[GUIDINGLI]

Hold for fix the knsh error

[acassis]

Please don't include README.txt into boards/. All README.txt were moved and converted to ReStructuredText into Documentation/ long time ago!